• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The modalities of the present invention relate to a method and a device for adjusting a color temperature, which belongs to the field of display technologies. The method includes acquiring a color coordinate value of a pixel on an LCD that is acquired, when the LCD displays a white screen, to detect whether the color coordinate value is in a target color coordinate area, where the coordinate area of color is target color is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value, according to a target LCD color temperature, and adjust, if the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel, until the color coordinate value of the pixel falls within the target color coordinate area due to the adjustment, where N is a positive integer.
    公开号:BR112016013617A2
    申请号:R112016013617-9
    申请日:2015-10-29
    公开日:2020-06-30
    发明作者:Anyu Liu；Guosheng Li；Guilin ZHONG
    申请人:Xiaomi Inc.；
    IPC主号:
    专利说明:

    [0001] [0001] This application refers to and claims priority for Chinese Patent Application 201510131391.5, filed on March 24, 2015, the entire contents of which are incorporated by reference. TECHNICAL FIELD
    [0002] [0002] The modalities of the present invention relate to the field of display technologies, in particular, a method and a device for adjusting a color temperature. BACKGROUND
    [0003] [0003] The color temperature of a light source refers to the temperature of an ideal black body, when the color of the light from the lights emitted by the light source is the same as the color of the light of the ideal black body. Generally, a light source with a low color temperature emits warm lights, while a light source with a high color temperature emits cool lights.
    [0004] [0004] The Liquid Crystal Display (LCD) includes a backlight module containing Light Emitting Diode (LED), a light guide plate and liquid crystals. The blue light, the red light and the green light emitted by different LEDs on the backlight module are deflected and irradiated to the light guide plate by their respective corresponding liquid crystals, and the light quia plate still mixes the three lights to acquire a corresponding display color for each pixel on the LCD. It can be seen that the color temperature of the LCD depends mainly on the color temperatures of the LEDs. If the LEDs have different color temperatures, then a user will feel different colors when the LCD displays a white screen. Therefore, it is necessary to adjust the temperature of the LCD light.
    [0005] [0005] Generally, manufacturers can divide the LEDs into blocks, according to the color temperatures of the LEDs, and the
    [0006] [0006] The modalities of the present invention provide a method and a device for adjusting a color temperature to solve the problem that the color temperature of an LCD is not uniform when the LEDs of different blocks are arranged transversely on the LCD.
    [0007] [0007] According to a first aspect of the modalities of the present invention, a method is provided for adjusting a color temperature, which comprises: acquiring a coordinated color value of a pixel on an LCD, when the LCD displays a white screen; detect whether the color coordinate value is in a target color coordinate area, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value, according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the color coordinate area target due to fit, where N is a positive integer.
    [0008] [0008] According to a second aspect of the modalities of the present invention, there is provided a device for adjusting a color temperature, which comprises:
    [0009] [0009] According to a third aspect of the modalities of the present invention, there is provided a device for adjusting a color temperature, which comprises: a processor; a memory for storing instructions executable by the processor; where the processor is configured to: acquire a coordinated color value of one pixel on an LCD, when the LCD displays a white screen; detect whether the color coordinate value is in a target color coordinate area, where the target color coordinate area is an area including a target color coordinate value and the target color coordinate value is a calculated color coordinate value, so according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, adjust a component value of,
    [0010] [0010] The technical solutions provided by the modalities of the present invention may include the following beneficial effects: a coordinated color value of a pixel on an LCD is acquired when the LCD displays a white screen; if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value , according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value of the pixel falls within the area target color coordinate due to adjustment. Since the primary lights have different component values, they can be mixed together to generate lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the adjusted primary lights reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not uniform, when the LEDs of different blocks are arranged across the LCD and improve the consistency of the color temperature of the LCD.
    [0011] [0011] It is to be understood that both the previous general invention and the following detailed invention are exemplary only, but cannot limit the present invention. BRIEF INVENTION OF DRAWINGS
    [0012] [0012] The attached drawings, which are incorporated in the specification and constitute a part of the specification of the present invention, illustrate modalities consistent with the present invention, and together with the invention, serve to explain the principles of the present invention.
    [0013] [0013] FIG. 1 is a flow chart of a method for adjusting a color temperature according to an exemplary embodiment;
    [0014] [0014] FIG. 2 is a flow chart of a method for adjusting a color temperature according to another exemplary embodiment;
    [0015] [0015] FIG. 3 is a block diagram of a device for adjusting a color temperature according to an exemplary embodiment;
    [0016] [0016] FIG. 4 is a block diagram of a device for adjusting a color temperature according to an exemplary embodiment; and
    [0017] [0017] FIG. 5 is a block diagram of a device for adjusting a color temperature according to an exemplary embodiment. DETAILED INVENTION
    [0018] [0018] The exemplary modalities will be described in detail here and examples of the exemplary modalities are illustrated in the attached drawings. Unless otherwise stated, the same numbers in different attached drawings represent the same or similar elements when the attached drawings are described below. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are only examples of devices and methods as described in detail in the appended claims and in accordance with some aspects of the present invention.
    [0019] [0019] FIG. 1 is a flow chart of a method for adjusting a color temperature according to an exemplary embodiment. The method for adjusting a color temperature is applied to a terminal including an LCD. As shown in FIG. 1, the method for adjusting a color temperature includes the following steps.
    [0020] [0020] In step 101, a color coordinate value of a pixel on an LCD is acquired when the LCD displays a white screen.
    [0021] [0021] In step 102, if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a coordinated color value calculated according to a target LCD color temperature.
    [0022] [0022] In Step 103, when the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value pixel falls within the target color coordinate area due to the fit, where N is a positive integer.
    [0023] [0023] In short, a method of adjusting the color temperature provided by the present invention includes that a coordinated color value of a pixel on an LCD is acquired, when the LCD displays a white screen; if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value of the pixel falls within the area target color coordinate due to adjustment. Since the primary lights having different component values can be mixed together to generate lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the adjusted primary lights reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not uniform, when the LEDs of different blocks are arranged across the LCD and have improved the consistency of the color temperature of the LCD.
    [0024] [0024] FIG. 2 is a flow chart of a method for adjusting a color temperature according to another exemplary embodiment. The method for adjusting a color temperature is applied to a terminal including an LCD. As shown in FIG. 2, the method for adjusting a color temperature includes the following steps.
    [0025] [0025] In step 201, a color coordinate value of a pixel on an LCD is acquired when the LCD displays a white screen.
    [0026] [0026] A coordinated color is to determine a point in a chromaticity diagram, where the point represents a color of light corresponding to the coordinated color. Generally, a transverse color coordinate axis is an x axis, while a vertical axis is a y axis, so a coordinated color value is represented by (x, y). For example, a color coordinate value for an incandescent color is (0.463, 0.420).
    [0027] [0027] A color temperature, which is calculated according to the coordinated color, has a corresponding relationship with the coordinated color. For example, a color temperature which is 7300k corresponds to a coordinated color value of (0.30 0.32). It is a mature technology to calculate a color temperature according to a coordinated color, which will not be repeated here.
    [0028] [0028] Since it is necessary to adjust the consistency of the LCD color temperature in the present mode, the adjustment of the LCD color temperature can be converted into the adjustment of the coordinated color value of the pixel on the LCD in an execution mode. In the present mode, the coordinated color value of the pixel is measured by a measuring device, when the LCD displays the white screen. Since a central area of the LCD emits relatively uniform lights, a color coordinate value of one pixel in the central area of the LCD can be measured in order to improve the accuracy of the color coordinate value.
    [0029] [0029] In step 202, if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a coordinated color value calculated according to a target color temperature on the LCD.
    [0030] [0030] In this mode, the terminal can program the target color temperature of the LCD, then calculate the target color coordinate value, according to the target color temperature, and then adjust the coordinate color value of the pixel on the LCD to the coordinated target color value, thus ensuring consistency of the LCD color temperature.
    [0031] [0031] Since it is difficult to adjust the pixel color coordinate value to the target color coordinate value accurately, the target color coordinate area can be defined based on the target color coordinate value, in order to reduce the difficulty in the adjustment. A user has the same perception at a color temperature corresponding to a color coordinate value in the target color coordinate area.
    [0032] [0032] The target color coordinate area can be calculated according to the target color coordinate value. Since the allowable errors of x and y in a color coordinate value are both 0.005 and the target color coordinate value is (0.30, 0.32), so the target color coordinate area is all coordinate values formed by four vertices (0.295, 0.315), (0.305, 0.315), (0.295, 0.325) and (0.305, 0.325).
    [0033] [0033] The step that the terminal detects if the color coordinate value is in the target color coordinate area includes that when the color coordinate value is in the target color coordinate area, it is determined that it is not necessary to adjust the color temperature of the LCD and the flow is terminated. Otherwise,
    [0034] [0034] In Step 203, when the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value pixel falls within the target color coordinate area due to the fit, where N is a positive integer.
    [0035] [0035] Since a light pixel color is acquired by mixing N primary lights, and different light colors are acquired when the primary lights with different component values are mixed. Therefore, the pixel color temperature is related to a component value of a primary light, and the component value of at least one primary light of N primary lights corresponding to the pixel can be adjusted when it is necessary to adjust the coordinate value. pixel color, where a component value is to indicate the ratio of a primary light to a light color, and the sum of the component values of all primary lights is equal to l, where the step is the component value of at least one primary light of N primary lights corresponding to the pixel is adjusted includes that a liquid crystal trigger voltage value corresponding to at least one primary light of N primary lights is adjusted, where the value of drive voltage is in a positive correlation relationship with the component value.
    [0036] [0036] For each primary light, a component value of a primary light is determined by a gray scale of the primary light and the gray scale of the primary light is determined by a deflection angle of a corresponding liquid crystal, while the angle The deflection rate of the corresponding liquid crystal is controlled by a corresponding activation voltage for the corresponding liquid crystal, thus the adjustment of the value of the primary light component can be converted into adjustment of a value of the activation voltage of the corresponding liquid crystal for the light. primary. A trigger voltage controls a liquid crystal corresponding to a primary light, in which the higher the trigger voltage value is, the greater the deflection angle of the liquid crystal is, and the greater the light transmission is, thus resulting in on a larger gray scale of the primary light and a value of the major component of the primary light, where the primary light is blue light, red light or green light, and the step is the liquid crystal trigger voltage value corresponding to at least one primary light from the N primary lights is adjusted includes: 1) whether the pixel color temperature is higher or lower than the target color temperature is determined according to the coordinated color value; 2) when the pixel color temperature is higher than the target color temperature, at least one operation to increase a trigger voltage value of a corresponding liquid crystal to blue light, reduce a trigger voltage value to a corresponding liquid crystal for the red light and reducing a trigger voltage value of a corresponding liquid crystal for the green light is performed; and 3) when the pixel color temperature is lower than the target color temperature, at least one operation to reduce a trigger voltage value of a liquid crystal corresponding to blue light, increase a trigger voltage value of a corresponding liquid crystal for the red light and increasing a trigger voltage value of a corresponding liquid crystal for the green light is performed.
    [0037] [0037] When the pixel color temperature is higher than the target color temperature, it is indicated that the color of the pixel light is a warm color, and at least an operation to increase the value of the trigger voltage of the crystal corresponding liquid for the blue light, reducing the trigger voltage value of the corresponding liquid crystal for the red light and reducing the trigger voltage value of the corresponding liquid crystal for the green light should be carried out in this way. For example, only the corresponding liquid crystal activation voltage value for blue light is increased, or only the corresponding liquid crystal activation voltage value for red light is reduced, or the liquid crystal activation voltage values are reduced. corresponding to the red light and the green light are reduced at the same time, or the activation voltage value of the corresponding liquid crystal for the blue light is increased, while the activation voltage values of the respective liquid crystals corresponding to the red light and the light green are reduced, and so on.
    [0038] [0038] Since the green light, the red light and the blue light are primary lights that have an effect on the brightness of the LCD from the most significant to the least importance, the voltage value of the corresponding liquid crystal activation for the blue light it can be increased, preferably, and the activation voltage values of the corresponding liquid crystals for the red light and the green light are subsequently reduced, in order to reduce the influence of the adjustment of the value of the component of the primary lights on the luminosity.
    [0039] [0039] In a first mode of execution, the step that at least one operation of increasing the voltage value of the corresponding liquid crystal to the blue light, reducing the value of the voltage of the corresponding liquid crystal to the light red and reduce the trigger voltage value of the corresponding liquid crystal for the green light is performed includes:
    [0040] [0040] In this embodiment, when the activation voltage value of the corresponding liquid crystal for the blue light is increased, the terminal can increase the activation voltage value according to a predetermined step. For example, if the predetermined step is set to 0.05v, then the terminal can increase the activation voltage value of the corresponding liquid crystal to the blue light by 0.05v each time, and detect whether a coordinated value of current color is in the target color coordinate area, and if the current coordinate value is not in the target color coordinate area, then continue to increase the corresponding liquid crystal trigger voltage value for blue light by 0.05v, otherwise, end the adjustment flow. Or the terminal can converge to a predetermined step and increase the trigger voltage value according to the convergent predetermined step. For example, if an initial predetermined step is 0.2v, then the terminal increases the trigger voltage value of the corresponding liquid crystal for blue light by 0.2v, and detects whether the current color coordinate value is at coordinated area of target color; if the current color coordinate value is not in the target area and is greater than the maximum value of the target color coordinate area, then set the default step to -0.1lv, and reduce the crystal trigger voltage value corresponding liquid for blue light by 0.1v; and if the current color coordinate value is not in the target area and is less than the maximum value of the target color coordinate area, then set the predetermined step to 0.2v, and continue to increase the trigger voltage value of the corresponding liquid crystal to blue light by 0.2v.
    [0041] [0041] The terminal can define a limit voltage value for each primary light and limit a liquid crystal activation voltage value corresponding to a primary light less than or equal to the limit voltage value. If the color coordinate value is not yet in the target color correlated area, when the corresponding liquid crystal trigger voltage value for blue light reaches the blue light threshold voltage value, then at least one reduce the activation voltage value of the corresponding liquid crystal to the red light and to reduce the activation voltage value of the corresponding liquid crystal to the green light needs to be performed, in which the processes of reducing the activation voltage value of the corresponding liquid crystal for red light and reducing the trigger voltage value of the corresponding liquid crystal for green light are similar to the process of increasing the trigger voltage value of the corresponding liquid crystal for blue light and will not be described here several times .
    [0042] [0042] When the color temperature of the pixel is lower than the temperature of the target color, it is indicated that the color of the pixel light is a cold color, and at least an operation to reduce the trigger voltage value of the crystal corresponding liquid for blue light, increasing the trigger voltage value of the corresponding liquid crystal for red light and increasing the trigger voltage value of the corresponding liquid crystal for green light needs to be performed at the moment. For example, only the trigger voltage value of the corresponding liquid crystal for the blue light is reduced, or only the trigger voltage value of the corresponding liquid crystal for the red light is increased, or the trigger voltage values of the liquid crystals corresponding to the red light and the green light are increased at the same time, or the voltage value of the corresponding liquid crystal to the blue light is reduced, while the values of the voltage of the liquid crystals corresponding to the red light and the light green are increased, and so on.
    [0043] [0043] Since the drop in a value of the primary light component can reduce the brightness of the LCD, the values of activation voltage of the liquid crystals, respectively, correspond to the red light and the green light can be increased, preferably, and the activation voltage value of the corresponding liquid crystal for the blue light is subsequently reduced, in order to reduce the influence of the adjustment of the value of the component of the primary lights on the brightness.
    [0044] [0044] In a second execution mode, the step that, at least, one operation to reduce the value of activation voltage of the corresponding liquid crystal to the blue light, increase the value of activation voltage of the corresponding liquid crystal to the light red and increase the voltage value of the corresponding liquid crystal for the green light is performed includes: 1) at least one operation to increase the voltage value of the corresponding liquid crystal for the red light and increase the voltage value activation of the corresponding liquid crystal for the green light is performed; and 2) after the activation voltage values of the corresponding liquid crystals for the red light and the green light reach their respective limit voltage values, the activation voltage value of the corresponding liquid crystal for the blue light is reduced,
    [0045] [0045] In step 204, a gamma curve corresponding to the primary lights is adjusted according to the value of the adjusted component of the primary lights, and a tendency to adjust the gamma curve is the same as the value of the component.
    [0046] [0046] Since theThe display effect is also related to brightness and contrast, after the value of the component of the primary lights is adjusted so that the color coordinate value of the pixel located in the target color coordinate area, the additional terminals they need to adjust the gamma curve of the primary lights in order to adjust the brightness and contrast of the LCD to improve the display effect of the LCD. For example, a blue light gamma curve does not need to be adjusted after a blue light component value is adjusted; gamma curves of red light and green light need to be adjusted, respectively, after the values of the component of green light and red light are adjusted, where the adjustment tendency of a gamma curve is the same as that of a component value. For example, a gamma curve is shifted upwards in a translational manner when a value of the primary lights component is increased, and it is shifted downwards in a translational way when the value of the primary lights component is reduced.
    [0047] [0047] It can be learned from the curve characteristics of a gamma curve that a smaller gray scale will bring less change in luminosity and a larger gray scale will bring more changes in luminosity. Therefore, a gamma curve adjustment range can be defined by segments, in order to improve the accuracy of the gamma curve adjustment. For example, a first adjustment range is defined by a gamma curve having a relatively small gray scale, a second adjustment range is defined by a gamma curve having a relatively large gray scale, and the first adjustment range is smaller than that the second adjustment range, in which the adjustment range for the gamma curve can be a value acquired through calculation, or an empirical value, which is not limited by the present modality.
    [0048] [0048] To summarize, the color temperature adjustment method provided by the present invention includes that a coordinated color value of a pixel on an LCD is acquired when the LCD displays a white screen; if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value according to a target color temperature of the LCD; if the color coordinate value is not in the target color coordinate area, a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value of the pixel falls within the coordinated area target color due to adjustment. Since the primary lights have different component values, they can be mixed together to generate lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the adjusted primary lights reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not yet uniform when the LEDs of different blocks are arranged across the LCD and improve the consistency of the color temperature of the LCD.
    [0049] [0049] In addition, the gamma curve corresponding to the primary lights is adjusted according to the value of the adjusted component of the primary lights, and the tendency to adjust the gamma curve is the same as that of the component value, so that the luminosity and the LCD contrast are adjusted after the color temperature of the LCD is adjusted, thus improving the LCD display effect.
    [0050] [0050] FIG. 3 is a block diagram of a device for adjusting a color temperature according to an exemplary embodiment. The device for adjusting a color temperature is applied to a terminal including an LCD. As shown in Fig. 3, the device for adjusting a color temperature includes a coordinate acquisition module 301, a coordinate detection module 302 and a component adjustment module
    [0051] [0051] The coordinate acquisition module 301 is configured to acquire a color coordinate value of one pixel on the LCD, when the LCD displays a white screen.
    [0052] [0052] The coordinate detection module 302 is configured to detect whether the color coordinate value acquired by the coordinate acquisition module 301 is in a target color coordinate area, where the target color coordinate area is an area that includes a value target color coordinate and the target color coordinate value is a coordinated color value calculated according to a target color temperature of the LCD.
    [0053] [0053] The component adjustment module 303 is configured to, when the coordinate detection module 302 detects that the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the target color coordinate area due to the adjustment, where N is a positive integer.
    [0054] [0054] To summarize, the color temperature adjustment device provided by the present invention acquires a color coordinate value of one pixel on an LCD, when the LCD displays a white screen, detect whether the color coordinate value is in an area target color coordinate, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a color coordinate value calculated according to an LCD target color temperature; and if the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the coordinate area of target color due to adjustment. Since, the primary lights that have different component values can be mixed together to generate lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the primary lights set reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not yet uniform, when the LEDs of different blocks are arranged across the LCD and have improved the consistency of the color temperature of the LCD.
    [0055] [0055] FIG. 4 is a block diagram of a device for adjusting a color temperature according to an exemplary embodiment. The device for adjusting a color temperature is applied to a terminal containing an LCD. As shown in Fig. 4, the device for adjusting a color temperature includes a 401 coordinate acquisition module, a 402 coordinate detection module and a component adjustment module
    [0056] [0056] The 401 coordinate acquisition module is configured to acquire a pixel color coordinate value on the LCD when the LCD displays a white screen.
    [0057] [0057] The coordinate detection module 402 is configured to detect whether the color coordinate value acquired by the coordinate acquisition module 401 is in a target color coordinate area, where the target color coordinate area is an area that includes a value target color coordinate and the target color coordinate value is a color value calculated according to a target color temperature of the LCD.
    [0058] [0058] The component adjustment module 403 is configured to, when the coordinate detection module 402 detects that the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the target color coordinate area due to the adjustment, where N is a positive integer.
    [0059] [0059] Alternatively, the component adjustment module 403 is further configured to adjust a liquid crystal activation voltage value corresponding to at least one primary light from the N primary lights, in which the activation voltage value is in a positive correlation relationship with the component value.
    [0060] [0060] Alternatively, component adjustment module 403 includes a color temperature sensing sub-module 4031, a first adjustment sub-module 4032 and a second adjustment sub-module 4033.
    [0061] [0061] The color temperature detection sub-module 4031 is configured to determine, according to the coordinated color value, whether the pixel color temperature is higher or lower than the target color temperature.
    [0062] [0062] The first adjustment sub-module 4032 is configured to execute, when the color temperature detection sub-module 4031 detects that the pixel color temperature is higher than the target color temperature, at least one operation of increasing a corresponding liquid crystal switching voltage value for blue light, reducing a corresponding liquid crystal switching voltage value for red light and reducing a corresponding liquid crystal switching voltage value for green light.
    [0063] [0063] The second adjustment sub-module 4033 is configured to execute, when the color temperature detection sub-module 4031 detects that the pixel color temperature is lower than the target color temperature, at least one operation to reduce a value of activation voltage of a corresponding liquid crystal for blue light, increase a value of activation voltage of a corresponding liquid crystal for red light and increase the value of a voltage of corresponding liquid crystal for green light.
    [0064] [0064] Alternatively, the first adjustment sub-module 4032 is also configured to: increase the activation voltage value of the corresponding liquid crystal for blue light; and after the corresponding liquid crystal activation voltage value for the blue light reaches a blue light limit voltage value, perform at least one operation to reduce the corresponding liquid crystal activation voltage value for the red light and reduce the activation voltage value of the corresponding liquid crystal to the green light.
    [0065] [0065] Alternatively, the second adjustment sub-module 4033 is further configured to: perform at least one operation to increase the activation voltage value of the corresponding liquid crystal to the red light and increase the activation voltage value of the liquid crystal corresponding to the green light; and after the activation voltage values of the corresponding liquid crystals for the red light and the green light reach their respective limit voltage values, reduce the activation voltage value of the corresponding liquid crystal for the blue light.
    [0066] [0066] Alternatively, the color temperature adjustment device also includes a 404 gamma adjustment module.
    [0067] [0067] The gamma adjustment module 404 is configured to adjust, according to the value of the adjusted component of the primary lights after adjustment by the component adjustment module 403, a corresponding gamma curve for the primary lights, in which a trend of adjustment of the gamma curve is the same as that of the component value.
    [0068] [0068] To summarize, the color temperature adjustment device provided by the present invention acquires a color coordinate value of one pixel on an LCD, when the LCD displays a white screen, detect whether the color coordinate value is in an area target color coordinate, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a color coordinate value calculated according to a target LCD color temperature, and if the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the color coordinate area target due to adjustment. Since, the primary lights that have different component values can be mixed together to generate lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the primary lights set reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not yet uniform when the LEDs of different blocks are arranged across the LCD and improve the consistency of the color temperature of the LCD.
    [0069] [0069] In addition, a gamma curve corresponding to the primary lights is adjusted according to the value of the adjusted component of the primary lights, and the tendency to adjust the gamma curve is the same as that of the component value, so that the luminosity and the LCD contrast are adjusted after the color temperature of the LCD is adjusted, thus improving the LCD display effect.
    [0070] [0070] A specific way for each module in the devices of the previous modalities to perform an operation was described in detail in the modalities related to the methods and will not be elaborated here.
    [0071] [0071] An exemplary embodiment of the present invention provides a device for adjusting a color temperature, which can implement a method of adjusting the color temperature provided by the present invention. The device for adjusting a color temperature includes a processor, and a memory for storing instructions executable by the processor, where the processor is configured to: acquire a coordinated color value of one pixel on an LCD when the LCD displays a white screen ; detect whether the color coordinate value is in a target color coordinate area, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a color coordinate value calculated from according to a target color temperature of the LCD; and if the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the coordinate area of target color due to fit, where N is a positive integer.
    [0072] [0072] FIG. 5 is a block diagram of a device 500 for adjusting a color temperature according to an exemplary embodiment. For example, device 500 can be a cell phone, a computer, a digital transmission terminal, a message transceiver, a game console, a tablet device, a medical device, fitness equipment, a personal digital assistant, and so on. onwards.
    [0073] [0073] With reference to Fig. 5, device 500 may include at least one of the following components: a processing component 502, a memory 504, a power source component 506, a multimedia component 508, a component audio 510, an input / output interface (1/0) 512, a sensor component 514 and a communication component 516.
    [0074] [0074] Generally, the processing component 502 controls the global operations of the device 500, such as operations related to display, phone calls, data communication, camera operations, and recording operations. The processing component 502 can include one or more processors 518 to execute the instructions, in order to complete all or some steps of the previous methods. In addition, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, Processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.
    [0075] [0075] Memory 504 is configured to store various types of data, in order to support operations on the device
    [0076] [0076] The power source component 506 provides power to various components of the device 500. The power source component 506 may include a power source management system, one or more power sources, and other components related to generation , power management and distribution of the 500 device.
    [0077] [0077] The multimedia component 508 includes a screen providing an output interface between the device 500 and a user. In some embodiments, the screen may include an LCD and a Touch Panel (TP). The screen can be implemented as a touch screen, in order to receive an input signal from the user, including the TP. The TP includes one or more touch sensors, in order to detect a touch, a device, and a gesture on the TP. The touch sensor can not only detect a limit of a touch or a device, but also detect a duration and pressure related to the touch or the device. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the device 500 is in an operating mode, such as a camera mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or provided with a focal length and optical zoom capability.
    [0078] [0078] The audio component 510 is configured for the output and / or input of an audio signal. For example, the audio component 510 includes a microphone (MIC). When the device 500 is in an operating mode, such as a call mode, a recording mode and a voice recognition mode, the MIC is configured to receive an external audio signal, and the received audio signal can still be stored in memory
    [0079] [0079] The 1/0 512 interface provides an interface between the processing component 502 and a peripheral interface module. The peripheral interface module can be a keyboard, a click wheel, buttons and so on. These buttons can include, but are not limited to, a home button, a volume button, a start button and a lock button.
    [0080] [0080] The sensor component 514 includes one or more sensors to provide status evaluation in various aspects for the device 500. For example, the sensor component 514 can detect an on / off state of the device 500, a relative location of a component, for example, the component is a display and keyboard of the device 500. The component of the sensor 514 can also detect a change in the location of the device 500 or a change in the location of a component of the device 500, the existence of a contact between a user and device 500, the location or acceleration / deceleration of device 500, and a change in temperature of device 500. Sensor component 514 may include a proximity sensor configured to detect the existence of a nearby object when there is no physical contact. The 514 sensor component can also include an optical sensor, such as a Complementary Metal Oxide Semiconductor (CMOS) image sensor or a Load-Coupled Device (CCD) image sensor used in an imaging application. In some embodiments, the component of sensor 514 may further include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
    [0081] [0081] Communication component 516 is configured to facilitate wired or wireless communication between the device
    [0082] [0082] In an exemplary embodiment, device 500 can be implemented by one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processors (DSP), Digital Signal Processing Devices (DSPD), Programmable Logic Devices (PLD ), Programmable Logic Gate Network (FPGA), controllers, microcontrollers, microprocessors, or other electronic elements, in order to implement the previous methods.
    [0083] [0083] A non-temporary computer-readable storage medium including an instruction is further provided in an exemplary embodiment, such as memory 504 including an instruction. The instruction can be executed by the processor 518 of the device 500, in order to complete the previous methods. For example, the non-temporary computer-readable storage medium may be a ROM, Random Access Memory (RAM), a Compact Disk ROM (CD-ROM), a magnetic tape, a floppy disk, a storage device for optical data, and so on.
    [0084] [0084] Other modalities of the invention will be evident to those skilled in the art from the consideration of the description and practice of the invention described here. This application is intended to cover any variations, uses, or adaptations of the invention following the general principles thereof and including such deviations from the present invention as come within known or customary practice in the art. The specification and modalities are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.
    [0085] [0085] It should be understood that the present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and changes can be made without departing from the scope of the present invention. The scope of the present invention is limited only by the appended claims. INDUSTRIAL APPLICABILITY
    [0086] [0086] In the embodiments of the present invention, a coordinated color value of a pixel on an LCD is acquired when the LCD displays a white screen; if the color coordinate value is in a target color coordinate area is detected, where the target color coordinate area is an area that includes a target color coordinate value and the target color coordinate value is a calculated color coordinate value according to a target color temperature of the LCD; if the color coordinate value is not in the target color coordinate area, then a component value of at least one primary light of N primary lights corresponding to the pixel is adjusted until the color coordinate value of the pixel falls within of the target color coordinate area due to adjustment. Since the primary lights that have different component values can be mixed together to generate the lights with different color temperatures, a component value of the primary lights can be adjusted, so that a color temperature acquired by mixing the primary lights The set temperature reaches a target color temperature, thus solving the problem that the color temperature of an LCD is not yet uniform when the LEDs of different blocks are arranged across the LCD and have improved the consistency of the color temperature of the LCD.
    权利要求:
    Claims (13)
    [1]
    1. Method for adjusting a color temperature, characterized by the fact that it comprises: acquiring a coordinated color value of one pixel on a Liquid Crystal Display (LCD), when the LCD displays a white screen; detect whether the color coordinate value is in a target color coordinate area, where the target color coordinate area is an area that comprises a target color coordinate value and the target color coordinate value is a color coordinate value, so according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel until the color coordinate value of the pixel falls within the coordinate area of target color due to fit, where N is a positive integer.
    [2]
    2. Method, according to claim 1, characterized by the fact that it adjusts the component value of at least one primary light of the N primary lights corresponding to the pixel, which comprises: adjusting a trigger voltage value of a corresponding liquid crystal at least one primary light from the N primary lights, where the drive voltage value is in a positive correlation relationship with the component value.
    [3]
    3. Method according to claim 2, characterized by the fact that the primary light is blue light, red light or green light, and adjusts the liquid crystal activation voltage value corresponding to at least one primary light the N primary lights comprising: determining whether a pixel color temperature is higher or lower than the target color temperature, according to the coordinated color value;
    when the pixel color temperature is higher than the target color temperature, to perform at least one operation to increase a trigger voltage value of a corresponding liquid crystal for blue light, reduce a voltage value of activating a corresponding liquid crystal for red light and reducing a voltage value of activating a corresponding liquid crystal for green light;
    when the pixel color temperature is lower than the target color temperature, to perform at least one operation to reduce a trigger voltage value of a corresponding liquid crystal for blue light, increase a voltage value of activation of a corresponding liquid crystal for the red light and increase a voltage value of activation of a corresponding liquid crystal for the green light.
    [4]
    4, Method according to claim 3, characterized by the fact that to perform at least one operation to increase the activation voltage value of the corresponding liquid crystal to the blue light, reduce the activation value of the crystal corresponding liquid for the red light and reduce the activation voltage value of the corresponding liquid crystal for the green light comprising:
    increase the activation voltage value of the corresponding liquid crystal for blue light; and after the corresponding liquid crystal drive voltage value for the blue light reaches a blue light limit voltage value, to perform at least one operation to reduce the corresponding liquid crystal drive voltage value for the red light and reduce the activation voltage value of the corresponding liquid crystal to the green light.
    [5]
    5. Method, according to claim 3, characterized by the fact that to perform at least one operation to reduce the activation voltage value of the corresponding liquid crystal to the blue light, increase the activation value of the crystal corresponding liquid for the red light and increase the value of activation voltage of the corresponding liquid crystal for the green light which comprises: perform at least one operation to increase the value of activation voltage of the corresponding liquid crystal for the red light and increase the activation voltage value of the corresponding liquid crystal for the green light; and after the activation voltage values of the corresponding liquid crystals for the red light and the green light reach their respective limit voltage values, reduce the activation voltage value of the corresponding liquid crystal for the blue light.
    [6]
    6. Method according to any one of claims 1 to 5, characterized by the fact that it further comprises: adjusting, according to the value of the adjusted component of the primary lights, a corresponding gamma curve for the primary lights, in which a trend adjustment of the gamma curve is the same as the component value.
    [7]
    7. Device for adjusting a color temperature, characterized by the fact that it comprises: a coordinated acquisition module, configured to acquire a coordinated color value of one pixel on a Liquid Crystal Display (LCD), when the LCD displays a display white; a coordinate detection module, configured to detect whether the color coordinate value acquired by the coordinate acquisition module is in a target color coordinate area, where the target color coordinate area is an area comprising a target color coordinate value and the target color coordinate value is a calculated color coordinate value according to a target LCD color temperature; and a component adjustment module configured to, when the coordinate detection module detects that the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N corresponding primary lights to the pixel until the color coordinate value of the pixel falls within the target color coordinate area due to the fit, where N is a positive integer.
    [8]
    8. Device according to claim 7, characterized by the fact that the component adjustment module is further configured to adjust a liquid crystal activation voltage value corresponding to at least one primary light from the N primary lights , where the drive voltage value is in a positive correlation relationship with the component value.
    [9]
    9. Device according to claim 8, characterized by the fact that the component adjustment module comprises: a color temperature to detect a sub-module configured to determine whether a pixel color temperature is higher or lower than the temperature the target color, according to the color coordinate value; a first adjustment sub-module configured to execute, when the color temperature detection sub-module detects that the pixel color temperature is higher than the target color temperature, at least one operation to increase a trigger voltage value of a corresponding liquid crystal for blue light, reduce a trigger voltage value of a corresponding liquid crystal for red light and reduce a trigger voltage value of a corresponding liquid crystal for green light; and a second adjustment sub-module configured to execute, when the color temperature detection sub-module detects that the pixel color temperature is lower than the target color temperature, at least one operation to reduce a trigger voltage value of a corresponding liquid crystal for blue light, increase a trigger voltage value of a corresponding liquid crystal for red light and increase a trigger voltage value of a corresponding liquid crystal for green light.
    [10]
    10. Device, according to claim 9, characterized by the fact that the first adjustment sub-module is further configured to: increase the activation voltage value of the corresponding liquid crystal for blue light; and after the corresponding liquid crystal activation voltage value for the blue light reaches a blue light limit voltage value, perform at least one operation to reduce the corresponding liquid crystal activation voltage value for the red light and reduce the activation voltage value of the corresponding liquid crystal to the green light.
    [11]
    11. Device according to claim 9, characterized by the fact that the second adjustment sub-module is further configured to: perform at least one operation to increase the activation voltage value of the corresponding liquid crystal for the red light and increase the activation voltage value of the corresponding liquid crystal for the green light; and after the activation voltage values of the corresponding liquid crystals for the red light and the green light reaches their respective limit voltage values, reduce the activation voltage value of the corresponding liquid crystal for the blue light.
    [12]
    12. Device according to any one of claims 7 to 11, characterized by the fact that it still comprises: a gamma adjustment module, configured to adjust, according to the value of the adjusted component of the primary lights after the adjustment made by the module of component adjustment, a corresponding gamma curve for the primary lights, where a tendency to adjust the gamma curve is the same as the component value.
    [13]
    13. Device for adjusting a color temperature, characterized by the fact that it comprises: a processor; a memory to store instructions executable by the processor; where the processor is configured to: acquire a coordinated color value of one pixel on a Liquid Crystal Display (LCD), when the LCD displays a white screen; detect whether the color coordinate value is in a target color coordinate area, where the target color coordinate area is an area that comprises a target color coordinate value and the target color coordinate value is a calculated color coordinate value, according to a target color temperature of the LCD; and when the color coordinate value is not in the target color coordinate area, adjust a component value of at least one primary light of N primary lights corresponding to the pixel, until the color coordinate value of the pixel falls within the coordinated area target color due to fit, where N is a positive integer.
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    同族专利:
    公开号 | 公开日
    KR101873658B1|2018-07-02|
    CN104766574B|2019-02-12|
    RU2651247C2|2018-04-18|
    RU2016122441A|2017-12-11|
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    JP2017515133A|2017-06-08|
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    WO2016150161A1|2016-09-29|
    CN104766574A|2015-07-08|
    KR20160124737A|2016-10-28|
    MX2016006429A|2016-12-14|
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