• 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:
    a voltage generator for lowering and outputting the low level of the gate-on pulse applied to the n−1 th gate line by a predetermined voltage; Since the off voltage of the gate-on pulse lowered by a certain voltage is applied to the n-th gate line, when the gate-on pulse is applied to the n-th gate line, the potential of the storage capacitor connected to the n-th gate line remains constant In the leakage current driving device of the liquid crystal module including the LCD panel, the gate-on pulse is applied to the n-th gate line because the off-voltage of the gate-on pulse applied to the n-th gate line is lower by a predetermined voltage (ΔV). After is applied, the potential stored in the holding capacitor is stabilized, thereby reducing the leakage current generated when the gate-on pulse is applied with the off voltage.
    公开号:KR19990060015A
    申请号:KR1019970080233
    申请日:1997-12-31
    公开日:1999-07-26
    发明作者:전만복
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Leakage current prevention device of liquid crystal module
    The present invention relates to an apparatus for preventing leakage current of a liquid crystal module, and more particularly, to an apparatus for preventing leakage current by applying an off voltage level of a gate on pulse to a voltage lower than an existing level.
    Hereinafter, the prior art will be described.
    Conventional TFT LCD can show excellent display quality because each pixel can be controlled independently by using a switch called TFT. However, TFT has a certain amount of leakage current even in OFF state, so the initially applied pixel voltage cannot be maintained. There is a problem in that a difference in luminance between frames occurs in a pixel that should display the same luminance, and thus it is recognized as flicker.
    Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide an apparatus for preventing leakage current by applying an off voltage level of a gate on pulse to a voltage lower than the existing level.
    1 is a block diagram of an apparatus for preventing leakage current of a liquid crystal module according to an exemplary embodiment of the present invention.
    Figure 2 is a waveform diagram of the voltage output from the voltage generator according to the embodiment of the present invention.
    3 is an equivalent circuit diagram of a general gate panel.
    The configuration of the present invention for achieving the above object,
    a voltage generator for lowering and outputting the low level of the gate-on pulse applied to the n−1 th gate line by a predetermined voltage;
    Since the off voltage of the gate-on pulse lowered by a certain voltage is applied to the n-th gate line, when the gate-on pulse is applied to the n-th gate line, the potential of the storage capacitor connected to the n-th gate line is kept constant. Including an LCD panel.
    Hereinafter, with reference to the accompanying drawings an embodiment of the present invention by the above configuration as follows.
    1 is a block diagram of an apparatus for preventing leakage current of a liquid crystal module according to an embodiment of the present invention;
    2 is a waveform diagram of a voltage output from a voltage generator according to an embodiment of the present invention;
    3 is an equivalent circuit diagram of a general gate panel.
    As shown in Figure 1, the configuration of the leakage current prevention device of the liquid crystal module according to an embodiment of the present invention,
    a voltage generator 1 for lowering the off voltage of the n-1 th gate-on pulse applied to the n-1 th gate line by a predetermined voltage V;
    Since the off voltage of the n-1 th gate on pulse lowered by a predetermined voltage ΔV is applied to the n-1 th gate line through the gate driver 11, when the n th gate on pulse is applied to the n th gate line and an LCD panel 2 in which the potential of the storage capacitor Cst connected to the n−1 th gate line is kept constant.
    An embodiment of the present invention by the above configuration will be described with reference to the accompanying drawings.
    In order to display the LCD panel 2, the timing controller 10 outputs the digital data input from the graphic controller (not shown) to the source driver 12, and the voltage generator 1 is a constant voltage (ΔV). Outputs a gate on pulse having an off voltage as low as (see FIG. 2).
    The digital data input to the source driver 12 is stored in a shift register and then converted into an analog voltage by a digital to analog converter and stored in a latch.
    The analog voltage stored in the latch is output to the LCD panel 2 by a load signal input from the timing controller 10 to the source driver 12.
    The gate on pulses output from the voltage generator 1 are sequentially input to the gate lines of the LCD panel 2 by the gate driver 11, when the gate on pulses input to the gate lines are in an on state. The analog voltage input from the latch to the LCD panel 2 is transmitted to each pixel of the LCD panel 2 so that the LCD panel 2 is displayed.
    At this time, the off voltage (off) of the gate on pulse output from the voltage generator 1 is lower than the off voltage (p-off) of the conventional gate on pulse by a predetermined voltage (ΔV), the gate to the n-th gate line After the on pulse is applied, the potential stored in the holding capacitor Cst connected to the n-1 < th > gate line is kept constant (see Fig. 3).
    As described above, in the leakage current prevention device of the liquid crystal module provided in the embodiment of the present invention, since the off voltage of the gate-on pulse applied to the n-th gate line is a voltage as low as a constant voltage (ΔV), n After the gate-on pulse is applied to the first gate line, the potential stored in the storage capacitor is stabilized, thereby reducing the leakage current generated when the gate-on pulse is applied with the off voltage.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] a voltage generator for lowering and outputting the low level of the gate-on pulse applied to the n−1 th gate line by a predetermined voltage;
    Since the off voltage of the gate-on pulse lowered by a certain voltage is applied to the n-th gate line, when the gate-on pulse is applied to the n-th gate line, the potential of the storage capacitor connected to the n-th gate line is kept constant. Leakage current prevention device of a liquid crystal module comprising an LCD panel.
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    同族专利:
    公开号 | 公开日
    KR100490058B1|2005-08-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-12-31|Application filed by 윤종용, 삼성전자 주식회사
    1997-12-31|Priority to KR1019970080233A
    1999-07-26|Publication of KR19990060015A
    2005-08-23|Application granted
    2005-08-23|Publication of KR100490058B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970080233A|KR100490058B1|1997-12-31|1997-12-31|Liquid crystal display|
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