• 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:
    PURPOSE: A vertical output circuit of a monitor is provided to vary a vertical driving signal outputted from a vertical driving integrated circuit(IC), which feeds back a vertical deflection current flowing on a vertical deflection coil and outputs the vertical driving signal according to an inputted vertical synchronizing signal, so as to automatically control the size of a vertical screen. CONSTITUTION: A vertical size detector(30) detects a vertical deflection current flowing on a vertical deflection coil(V-DY), and outputs a predetermined feedback signal for compensating the size of a vertical screen, according to changes of vertical deflection remaining amounts. A vertical driving integrated circuit(IC)(10) variably outputs a predetermined vertical driving signal, according to the feedback signal inputted after being outputted from the vertical size detector(30) and an inputted vertical synchronizing signal. The vertical size detector(30) comprises as follows. A photo coupler(31) detects the vertical deflection current and outputs a feedback voltage signal in proportion to the vertical deflection remaining amounts. A comparator(32) outputs a feedback signal indicating a lower voltage characteristic, as the feedback voltage signal of the photo coupler(31) is bigger than a reference voltage, and applies the feedback signal to the vertical driving IC(10).
    公开号:KR20010010986A
    申请号:KR1019990030151
    申请日:1999-07-24
    公开日:2001-02-15
    发明作者:이정욱
    申请人:김영환；현대전자산업 주식회사；
    IPC主号:
    专利说明:

    Vertical output circuit in a monitor}
    The present invention relates to a vertical output circuit of a monitor, and more particularly to a vertical output circuit of a monitor equipped with a function for automatically adjusting the vertical screen size.
    In general, when the vertical frequency output from the PC is input to the monitor, the vertical screen size of the monitor is also changed. Therefore, in the conventional monitor, the vertical screen size of the monitor is changed by varying the amount of deflection current flowing through the vertical deflection coil according to the vertical frequency. There is a vertical output circuit adapted to adjust.
    Referring to the conventional vertical output circuit shown in Fig. 1, the vertical drive IC 10 is configured to output a predetermined vertical drive signal in accordance with a predetermined vertical synchronization signal output from a PC. In addition, when a vertical driving signal output from the vertical driving IC 10 is input, the vertical output IC 21 of the vertical output unit 20 amplifies the vertical driving signal and vertically passes through the noise removing unit 22. A predetermined vertical deflection current is applied to the deflection coil V-DY.
    At this time, the vertical output IC 21 receives the current flowing through the vertical deflection coil V-DY through the current feedback unit 23 and power amplifies the vertical driving signal.
    In Fig. 1, the resistors R4 and R7 of the current feedback section 23 are current feedback resistors, R5 are surge and noise canceling resistors, and the resistor R6 is the reference voltage resistor of the vertical output IC 21. . In addition, the capacitors C1 and C2 of the noise removing unit 22 and the resistor R8 remove noise included in the deflection current output from the vertical output IC 21 and the vertical output IC 21 and the vertical deflection coil V. -DY) to match each other.
    The vertical output circuit operating as described above adjusts the variable resistor VR connected directly to the vertical drive IC 10 whenever a vertical synchronous signal output from the PC is changed in accordance with the video mode so that the vertical deflection coil ( By adjusting the vertical deflection current flowing through V-DY), the vertical screen size is set to an appropriate size.
    Typically, the vertical screen size of a monitor is set to an appropriate size as the producer adjusts the vertical deflection current by adjusting the variable resistance VR while watching the vertical screen displayed directly on the CRT at the time of monitor production.
    However, at the time of monitor production, if the producer directly changes the vertical deflection current to set the vertical screen size to an appropriate size or the user directly implements the vertical output circuit to change the vertical deflection current to set the vertical screen size every time the video mode is changed. Not only the productivity of the monitor is lowered, but also there is a problem that the user is inconvenient to use.
    Accordingly, an object of the present invention is to overcome the above-described problems, and an object of the present invention is to receive a vertical deflection current flowing through a vertical deflection coil and to output a vertical drive signal according to an input vertical synchronization signal. It provides a monitor's vertical output circuit that automatically adjusts the vertical screen size by varying the vertical drive signal.
    In the vertical output circuit of the monitor for achieving the object of the present invention, when the vertical drive IC outputs a vertical drive signal according to the input vertical synchronization signal, the vertical output IC of the horizontal output unit feeds the current flowing through the vertical deflection coil through the current feedback unit. A vertical output circuit of a monitor configured to receive power amplification of a vertical drive signal and apply a predetermined vertical deflection current to a vertical deflection coil via a noise canceller.
    A vertical magnitude detector for detecting a vertical deflection current flowing through the vertical deflection coil and outputting a predetermined feedback signal for compensating a vertical screen size according to a change in the amount of vertical deflection current; and a feedback signal output from the vertical magnitude detector; And a vertical driving IC which variably outputs a predetermined vertical driving signal in accordance with the input vertical synchronizing signal.
    In the vertical output circuit of the monitor according to the above configuration, the vertical output IC power amplifies the vertical driving signal of the vertical driving IC every time the vertical frequency is changed to apply a predetermined vertical deflection current to the vertical deflection coil. The vertical magnitude detecting unit detects a vertical deflection current flowing through the vertical deflection coil, outputs a feedback voltage signal proportional to the amount of vertical deflection current, and outputs a feedback signal indicating a lower voltage characteristic as the feedback voltage signal is larger than a reference voltage, thereby outputting the vertical driving IC. Accordingly, the vertical driving IC outputs a vertical driving signal representing a voltage characteristic proportional to the voltage level of the feedback signal of the vertical magnitude detecting unit to vary the vertical deflection current to respond to the vertical frequency variation. Vertical screen size to optimal size It is adapted to control the same.
    1 is a circuit diagram showing a conventional vertical output circuit,
    2 is a circuit diagram showing a vertical output circuit of the monitor according to the present invention.
    <Explanation of symbols for main parts of drawing>
    10: vertical drive IC 20: vertical output
    21: vertical output IC 22: noise canceling section
    23: current feedback unit 30: vertical size detection unit
    31: photo coupler 32: comparator
    V-DY: vertical deflection coil VR: variable resistor
    R1 to R8: resistors C1 and C2: capacitors
    Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    Referring to FIG. 2, the vertical driving IC 10 variably outputs a predetermined vertical driving signal according to a predetermined vertical synchronizing signal output from a PC and a feedback signal of a vertical deflection current. That is, the vertical driving IC 10 variably outputs a predetermined vertical driving signal according to the feedback signal inputted from the vertical size detection unit 30 and the input vertical synchronization signal.
    The vertical driving IC 10 outputs a vertical driving signal indicating a high voltage characteristic in order to increase the vertical deflection current and to increase the screen size when a feedback signal indicating a high voltage characteristic is input, and vice versa. When is input, in order to reduce the vertical deflection current to reduce the size of the screen outputs a vertical drive signal showing a low voltage characteristic.
    The vertical output IC 21 of the vertical output unit 20 amplifies the vertical drive signal and applies a predetermined vertical deflection current to the vertical deflection coil V-DY via the noise removing unit 22. At this time, the vertical output IC 21 receives the current flowing through the vertical deflection coil V-DY through the current feedback unit 23 and power amplifies the vertical driving signal.
    The vertical size detector 30 detects a vertical deflection current flowing through the vertical deflection coil V-DY and outputs a predetermined feedback signal for compensating the vertical screen size according to the change of the vertical deflection current amount.
    The photo coupler 31 of the vertical magnitude detector 30 detects a vertical deflection current flowing through the vertical deflection coil V-DY and outputs a feedback voltage signal proportional to the amount of vertical deflection current.
    The photo coupler 31 detects a horizontal deflection current fed back to the vertical output IC 21 through the current feedback section 23 of the horizontal output section 20.
    A current proportional to the amount of vertical deflection current flows through the photodiode of the photocoupler 31 and the collector-emitter of the phototransistor.
    The comparator 32 of the subic size detector 30 outputs a feedback signal having a lower voltage characteristic as the feedback voltage signal of the photo coupler 31 is greater than the reference voltage.
    As the collector-emitter current of the photo transistor increases, the comparator 32 outputs a feedback signal indicating a low voltage characteristic as the feedback voltage signal input to the comparator 32 increases.
    2, the resistors R4 and R7 of the current feedback section 23 are current feedback resistors, R5 are surge and noise removing resistors, and the resistor R6 is the reference voltage resistor of the vertical output IC 21. .
    The capacitors C1 and C2 of the noise removing unit 22 and the resistor R8 remove noise included in the deflection current output from the vertical output IC 21 and the vertical output IC 21 and the vertical deflection coil V-DY. ) To match each other.
    The resistors R1 and R2 of the vertical magnitude detector 30 are resistors for the reference voltage of the comparator 32, and the resistors R3 and R9 are resistors for removing noise.
    By the above configuration, the vertical output circuit of the monitor according to the present invention operates as follows.
    When the vertical frequency varies, the vertical output IC 21 power amplifies the vertical driving signal of the vertical driving IC 10 and applies a predetermined vertical deflection current to the vertical deflection coil V-DY. The photo coupler 31 connected to the current feedback section 23 of 20 detects a vertical deflection current flowing through the vertical deflection coil V-DY, and outputs a feedback voltage signal proportional to the amount of vertical deflection current.
    For example, as the vertical frequency changes, the current of the vertical deflection current flowing through the current vertical deflection coil V-DY increases, and the current flowing through the resistors R7 and R4 of the current feedback unit 23 of the vertical output unit 20 also increases. When increasing, a large amount of current flows through the photodiode and the phototransistor of the photocoupler 31, so that the photo coupler 31 outputs a high feedback voltage signal, and conversely, the current flowing through the current vertical deflection coil V-DY. When the deflection current decreases, a small amount of current flows through the photodiode and the phototransistor of the photocoupler 31, so that the photo coupler 31 outputs a low feedback voltage signal.
    As the vertical deflection current is varied as described above, when the photo coupler 31 outputs a predetermined feedback voltage signal to the comparator 32, the comparator 32 is coupled with the feedback voltage signal of the photo coupler 31. A predetermined feedback signal based on a result of comparing the reference voltages is output.
    That is, the comparator 32 outputs a feedback signal indicating a lower voltage characteristic as the feedback voltage signal has a larger value than the reference voltage and feeds it back to the vertical driving IC 10.
    For example, when the photocoupler 31 detects that the amount of vertical deflection current is increasing and outputs a high feedback voltage signal, the comparator 32 provides feedback indicating low voltage characteristics in order to reduce the amount of increasing vertical deflection current to a predetermined value. On the contrary, when the photo coupler 31 detects that the amount of vertical deflection current is decreasing and outputs a low feedback voltage signal, the comparator 32 increases the amount of decreasing vertical deflection current to a predetermined value. Outputs a feedback signal representing the characteristic.
    As the vertical frequency is changed as described above, when the predetermined feedback signal output from the comparator 32 is first fed back to the vertical driving IC 10 after outputting a predetermined vertical driving signal, the vertical driving IC 10 Outputs a vertical drive signal indicating a voltage characteristic proportional to the voltage level of the feedback signal of the comparator 32 to vary the vertical deflection current to automatically adjust the vertical screen size to an optimal size in response to the vertical frequency variation.
    For example, when the comparator 32 outputs a feedback signal indicating a low voltage characteristic in order to reduce the amount of increasing vertical deflection current to a predetermined value, the vertical driving IC 10 outputs a predetermined first output as the vertical frequency is changed. By outputting a vertical drive signal having a lower voltage characteristic than the vertical drive signal, the amount of vertical deflection current is reduced and the vertical screen size is reduced.
    When the comparator 32 outputs a feedback signal indicating a high voltage characteristic to increase the amount of decreasing vertical deflection current to a predetermined value, the vertical driving IC 10 first outputs a predetermined vertical drive as the vertical frequency is changed. Outputs a vertical drive signal that exhibits higher voltage characteristics than the signal to increase the amount of vertical deflection current and at the same time increase the vertical screen size.
    As described above, the vertical output circuit of the monitor according to the present invention receives the vertical deflection current flowing through the vertical deflection coil and varies the vertical drive signal output from the vertical drive IC outputting the vertical drive signal according to the input vertical synchronization signal. Since the vertical screen size is automatically adjusted, the productivity of the monitor can be improved by eliminating the process for properly setting the vertical screen size from the production process of the monitor, and there is an effect of providing convenience to the user.
    What has been described above is just one embodiment for implementing the vertical output circuit of the monitor according to the present invention, and the present invention is not limited to the above-described embodiment, but the gist of the present invention claimed in the following claims. Various changes can be made by those skilled in the art without departing from the scope of the present invention.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] When the vertical driving IC 10 outputs the vertical driving signal according to the input vertical synchronizing signal, the vertical output IC 21 of the horizontal output unit 20 passes through the current feedback unit 23 to the vertical deflection coil V-DY. In a vertical output circuit of a monitor configured to receive power flowing back and amplify a vertical driving signal and apply a predetermined vertical deflection current to the vertical deflection coil V-DY via the noise removing unit 22.
    A vertical magnitude detector 30 which detects a vertical deflection current flowing through the vertical deflection coil V-DY and outputs a predetermined feedback signal for compensating the vertical screen size according to the change of the vertical deflection current amount;
    Vertical driving IC 10 for outputting a predetermined vertical drive signal in accordance with the feedback signal and the input vertical synchronization signal output from the vertical size detector 30.
    Vertical output circuit of the monitor comprising a.
    [2" claim-type="Currently amended] The method of claim 1, wherein the vertical size detector 30
    A photo coupler 31 which detects a vertical deflection current flowing through the vertical deflection coil V-DY and outputs a feedback voltage signal proportional to the amount of vertical deflection current;
    The comparator 32 outputs a feedback signal indicating a lower voltage characteristic as the feedback voltage signal of the photo coupler 31 is greater than a reference voltage and applies the feedback signal to the vertical driving IC 10.
    Vertical output circuit of the monitor comprising a.
    [3" claim-type="Currently amended] 3. The photocoupler 31 of the vertical magnitude detector 30 is fed back to the vertical output IC 21 through the current feedback section 23 of the horizontal output section 20. A vertical output circuit of a monitor, characterized by detecting a horizontal deflection current.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1999-07-24|Application filed by 김영환, 현대전자산업 주식회사
    1999-07-24|Priority to KR1019990030151A
    2001-02-15|Publication of KR20010010986A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019990030151A|KR20010010986A|1999-07-24|1999-07-24|Vertical output circuit in a monitor|
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