• 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 present invention relates to a backlight lighting device circuit of a mobile communication device, comprising: an optical sensor unit connected to a second amplifier and converting a signal of light into an electrical signal; A first amplifier connected between the optical sensor unit and the A / D conversion unit to amplify the weak electric signal converted by the optical sensor unit; An A / D converter connected between the first amplifier and the CPU to convert an analog signal amplified from the first amplifier into a digital signal; A CPU unit connected between the A / D conversion unit and the D / A conversion unit to control the brightness of the backlight unit; A D / A conversion unit connected between the CPU unit and the second amplifier unit to convert a digital signal output from the CPU unit into an analog signal; A second amplifier connected between the D / A converter and the backlight unit to control the backlight unit by adjusting a gain value; Backlight lighting automatic on / off control device of the mobile communication device, characterized in that it comprises a backlight lighting unit. The present invention is to prevent unnecessary current consumption has the effect of extending the use time of the battery.
    公开号:KR19980058144A
    申请号:KR1019960077453
    申请日:1996-12-30
    公开日:1998-09-25
    发明作者:박의권
    申请人:김영환；현대전자산업 주식회사；
    IPC主号:
    专利说明:

    BACK LIGHT automatic on / off control device of mobile communication device
    1 is a conventional backlight lighting circuit
    2 is a block diagram of a back light automatic on / off control apparatus of a mobile communication device of the present invention.
    Explanation of symbols for main parts of the drawings
    1: optical sensor unit 2: first amplifier unit
    3: A / D converter 4: CPU
    5: D / A conversion part 6: 2nd amplification part
    7: BACK LIGHT
    The present invention relates to a backlight lighting device circuit of a mobile communication device such as a mobile phone or a pager, and in particular, to adjust the brightness of backlight lighting according to the brightness of light using an optical sensor.
    Backlight is a device that lights up at the back of the display panel so that it can be used at night as in daytime.
    The conventional apparatus includes a controller for controlling on / off of backlighting as shown in FIG. 1; Resistance; A transistor serving as a switch according to a signal output from the controller (TRANGISTER: hereinafter referred to as TR); It was configured to include a light emitting diode.
    In this conventional device, the circuit operates even under daytime or indoor lighting.
    However, the conventional apparatus configured as described above has a problem in that daytime, even in indoor lighting, when the backlight lighting unit is operated, current is unnecessarily consumed, and the battery life is shortened.
    SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems. In particular, the backlight unit automatically turns on / off the backlight unit of the mobile communication device to quantitatively adjust the brightness of the backlight unit according to the brightness of the ambient light using an optical sensor. To provide an off control.
    In order to achieve the above object, an automatic backlight lighting on / off control apparatus of a mobile communication device of the present invention includes an optical sensor for converting a signal of light into an electrical signal; A first amplifier for amplifying the weak electrical signal converted by the optical sensor; An A / D converter converting the analog signal amplified from the first amplifier into a digital signal; A central processing unit (CENTRAL PROCESSING UNIT: hereinafter referred to as CPU) for controlling the brightness of the backlighting unit; A D / A converter converting the digital signal output from the CPU into an analog signal; A second amplifier for controlling the brightness of the backlight unit by adjusting the gain value; It is characterized by its technical configuration that the backlight is configured to include.
    The automatic backlight lighting on / off control device of the present invention uses a light sensor to quantitatively adjust the brightness of the backlight lighting unit according to the degree of ambient light brightness, thereby preventing unnecessary current consumption and using the battery. It is effective to prolong time.
    Hereinafter, an embodiment according to the technical idea of the backlighting automatic on / off control device of the present invention configured as described above, will be described in detail with reference to the accompanying drawings.
    Example
    As shown in FIG. 2, the signal output terminal of the optical sensor unit 1 is connected to the signal input terminal of the first amplifier 2, and the signal output terminal of the first amplifier 2 is connected to the A / D converter. The signal output terminal of the CPU unit 4 is connected to the signal input terminal of the CPU unit 4, and the signal output terminal of the CPU unit 4 is connected to the D / A converter unit. The signal output terminal of the D / A converter 5 is connected to the signal input terminal of the second amplifier 6, and the signal output terminal of the second amplifier 6 is backlighted. This embodiment is constructed by connecting to the signal input terminal of the illumination unit 7.
    Hereinafter, the operation of the present embodiment configured as described above will be described.
    First, the optical signal input from the phototransistor of the optical sensor unit 1 (hereinafter referred to as P-TR) is a weak signal converted into an electrical signal. It is input to the CPU section 4 via the converter section 3.
    The digital signal converted according to the brightness of the light is input from the CPU unit 4 to the D / A converter 5, and the input signal is adjusted by the second amplifier 6 with gain.
    By comparing the voltage input from the D / A converter 5 with the reference voltage, the base terminal voltage of the second amplifier 6 TR (Q1) is adjusted, and the output voltage is automatically adjusted according to the brightness of the light. The brightness of the backlight unit 7 is to be adjusted.
    For example, if the ambient light is bright (under daylight or bright light), the level of the electrical signal converted from the P-TR will also increase, and accordingly the output voltage output from the D / A converter 5 will be high. If the base terminal potential voltage of the second amplifier 6 TR (Q1) is also high, the collector output current of TR (Q1) flows less, and the light brightness of the backlight unit becomes dim.
    On the contrary, when the ambient light brightness is dark (night or dark lighting), the level of the electrical signal converted from the P-TR of the optical sensor unit 1 becomes small, so that the second amplifier 6 TR (Q1) Collector's output current flows a lot and the brightness of the backlight unit 7 becomes brighter.
    As described above, the backlighting automatic on / off control device of the present invention is to automatically adjust the lighting of the backlighting unit automatically according to the ambient light brightness, thereby preventing unnecessary current consumption and extending the battery life. There is an effect that can be done.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] An optical sensor unit connected to the second amplifier unit and converting a signal of light into an electrical signal; A first amplifier connected between the optical sensor unit and the A / D conversion unit to amplify the weak electric signal converted by the optical sensor unit; An A / D converter connected between the first amplifier and the CPU to convert an analog signal amplified from the first amplifier into a digital signal; A CPU unit connected between the A / D conversion unit and the D / A conversion unit to control the brightness of the backlight unit; A D / A conversion unit connected between the CPU unit and the second amplifier unit to convert a digital signal output from the CPU unit into an analog signal; A second amplifier connected between the D / A converter and the backlight unit to control the backlight unit by adjusting a gain value; Backlight lighting automatic on / off control device of the mobile communication device, characterized in that it comprises a backlight lighting unit.
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    同族专利:
    公开号 | 公开日
    KR100316694B1|2002-02-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-30|Application filed by 김영환, 현대전자산업 주식회사
    1996-12-30|Priority to KR1019960077453A
    1998-09-25|Publication of KR19980058144A
    2002-02-19|Application granted
    2002-02-19|Publication of KR100316694B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960077453A|KR100316694B1|1996-12-30|1996-12-30|Apparatus for automatically turning on/off backlight of mobile communication device|
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