Drain discharging apparatus and method for improving twinkling at start
A start-up flickering and discharging device technology, which is applied to static indicators, instruments, etc., can solve problems such as poor screen flickering, and achieve the effects of reduced screen flickering defect rate, low cost, and improved leakage characteristics
Active Publication Date: 2010-04-14
K TRONICS (SUZHOU) TECH CO LTD +1
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Problems solved by technology
[0005] The purpose of the present invention is to provide a drain discharge device and method for improving the start-up flicker, improve the leakage characteristics of the thin film transistor through the external circuit of the panel, and effectively solve the technical defects such as poor screen flicker that cannot be effectively overcome in the prior art
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[0023] figure 1 It is a schematic circuit diagram of an embodiment of the drain discharge device for improving the startup flickering of the present invention. Such as figure 1 As shown, the drain discharge device for improving startup flicker includes a DC analog power supply AVDD, a switch tube, a diode D1 and a storage capacitor C1. In this embodiment, the switch tube is a P-channel enhanced field effect transistor Q1. Among them, the source S of the P-channel enhanced field effect transistor Q1 is connected to the storage capacitor C1, the drain D is connected to the gate shutdown power supply of the thin film transistor (TFT), the gate S is connected to the DC analog power supply AVDD, and the DC analog The power supply AVDD is also connected to the anode of the unidirectional conduction diode D1, and the cathode of the diode D1 is connected to the storage capacitor C1.
[0024] The working process of the drain discharge device for improving the power-on flickering of...
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The invention relates to a device and a method for improving drain electrode discharge of start-up flickering, the device comprises an DC analog power supply which is connected with an anode of one-way conduction diode, a cathode of the diode is connected with a storage capacitance, switch tubes are connected between the DC analog power supply, the cathode of the diode and the grid electrode cut-off power supply of the thin-film transistor in the panel. The method comprises that when cutting off the panel power supply, an positive voltage is inputted to the grid electrode cut-off power supplyof the thin-film transistor in the panel to enable the grid cut-off voltage more than 0 V in the setting time. The invention improves the creepage characteristic of the thin-film transistor by increasing the grid electrode cut-off voltage of the thin-film transistor at close-down moment for an instant, not only further reduces the picture flickering defective fraction, but also avoids difficulty ofpicture design, with low cost and extensive application prospect.
Description
technical field [0001] The invention relates to a control device and a control method of a liquid crystal display device, in particular to a drain discharge device and a method for improving start-up flicker. Background technique [0002] The input signal of the existing liquid crystal display is an analog signal with a frequency of 60 Hz. When it is turned on quickly after shutdown (the time interval between shutdown and startup is less than 2 seconds), poor power on flicker generally occurs, and the time interval between shutdown and startup The shorter it is, the stronger the flickering is, but when the time interval between power off and on is longer, the flicker will become weaker or even disappear. [0003] The mechanism of LCD screen flickering is that after the power of the module is turned off, since there is no signal on the thin film transistor (TFT) of the LCD panel (Panel), the pixels in the panel retain the charge of the last picture driving the panel. During ...
Claims
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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 王英
Owner K TRONICS (SUZHOU) TECH CO LTD