Drive apparatus and drive method of thin-film transistor liquid crystal display

A liquid crystal display and thin film transistor technology, which is applied in the field of display driving, can solve the problems of poor display effect, high S-COF temperature, and inability to reduce the maximum value of gray-scale voltage, and achieves the effect of ensuring charging efficiency and reducing heat generation.

Active Publication Date: 2016-11-23
SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem in the prior art that the maximum value of the grayscale voltage of the system cannot be lowered at a high refresh

Method used

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  • Drive apparatus and drive method of thin-film transistor liquid crystal display
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  • Drive apparatus and drive method of thin-film transistor liquid crystal display

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Experimental program
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specific Embodiment approach 1

[0060] Specific implementation mode one: refer to image 3 This implementation mode is specifically described, a driving device for a thin film transistor liquid crystal display described in this implementation mode, the device includes the following units:

[0061] Grayscale judging unit: select the intermediate grayscale value of the display system, and compare the current grayscale value with the intermediate grayscale value;

[0062] Voltage output unit: used to reduce the gate turn-on voltage when the current gray scale value is less than the middle gray scale value.

[0063] The above voltage output unit is also used for:

[0064] When the current gray scale value is greater than the middle gray scale value, the gate turn-on voltage remains unchanged.

[0065] The above-mentioned gray scale judging unit specifically includes the following modules:

[0066] Gray-scale acquisition module: used to collect the gray-scale value of the current screen data in the timing cont...

specific Embodiment approach 2

[0072] Specific implementation mode two: refer to image 3 Describe this embodiment in detail. This embodiment is a further description of the driving device for a thin film transistor liquid crystal display described in Embodiment 1. The voltage output unit includes: a resistor R1, a resistor R2, a P-MOS transistor M1 and N-MOS tube M2;

[0073] Such as image 3 As shown, VGH is the gate turn-on voltage generated on the PCB, and its value is greater than or equal to the maximum value of the gate turn-on voltage required by the panel (for example: 33V);

[0074] Resistor R1 and resistor R2 are the resistors formed by the Array process on the Fan Out Area. The two resistors can divide VGH into two parts to output separately, namely: the source input voltage V of the P-MOS transistor 1 , the drain input voltage V of N-MOS transistor M2 2 ; A is the control signal output by TCON, and OUTPUT represents the output voltage of the voltage output unit.

[0075] The gate turn-on vo...

specific Embodiment approach 3

[0096] Specific implementation mode three: refer to Figure 4 This implementation mode is specifically described, a driving method of a thin film transistor liquid crystal display described in this implementation mode, the device includes the following steps:

[0097] S401 selects the middle grayscale value of the display system,

[0098] S402 and comparing the current gray scale value with the middle gray scale value, and judging whether the current gray scale value is greater than the middle gray scale value;

[0099] S404, when the current gray scale value is smaller than the middle gray scale value, lower the gate turn-on voltage.

[0100] The above-mentioned driving method of a thin film transistor liquid crystal display, the method also includes:

[0101] S404 When the current gray scale value is greater than the middle gray scale value, the gate turn-on voltage remains unchanged.

[0102] For the driving method of the above-mentioned thin film transistor liquid cryst...

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Abstract

The invention provides a drive apparatus and a drive method of a thin-film transistor liquid crystal display, which relate to the technical field of a display drive. In order to solve the problems in the prior art that a maximum value of a system gray-scale voltage at a high refresh frequency cannot be reduced, the S-COF temperature is excessively high, and the display effect is poor, the invention adopts a novel drive architecture design, a plurality of VGH voltages are utilized, and at a low gray-scale phase, the system adopts a relatively low reference voltage to match with the normal VGH voltage, and the needed gray scale is obtained by virtue of white balance settings; and at a high gray-scale phase, the system adopts a relatively high VGH voltage to guarantee the charging efficiency, and the needed gray scale is acquired. By adopting the drive apparatus and the drive method, the maximum value of the gray-scale voltage can be reduced, and S-COF heat is further reduced.

Description

technical field [0001] The invention belongs to the technical field of display driving, and in particular relates to a driving device and a driving method of a thin film transistor liquid crystal display. Background technique [0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display) is one of the main varieties of flat panel display, and has become an important display platform in modern IT and video products. The main driving principle of TFT-LCD, such as figure 1 Shown: The main board of the system connects the R / G / B three-color compressed signal, control signal and power to the connector (connector) on the PCB board (print circuit board, printing board) through the wire, and the data passes through the TCON on the PCB board. (Timing Controller, timing controller) After IC processing, through the PCB board, through S-COF (Source-Chip on Film, source film on film) and G-COF (Gate-Chip on Film, gate film on film) Connect wi...

Claims

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Application Information

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IPC IPC(8): G09G3/36
CPCG09G3/36G09G3/3696G09G2320/0271
Inventor 黄笑宇
Owner SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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