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Voltage conversion circuit, display panel and driving method thereof

一种电压转换电路、电压的技术，应用在静态指示器、非线性光学、仪器等方向，能够解决显示面板闪烁大等问题，达到改善色偏现象、提高显示品质的效果

Active Publication Date: 2017-04-19
TCL 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 purpose of the present invention is to solve the technical defect that the display panel in VA mode flickers relatively large in the prior art

Method used

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  • Voltage conversion circuit, display panel and driving method thereof
  • Voltage conversion circuit, display panel and driving method thereof
  • Voltage conversion circuit, display panel and driving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] figure 1 It is a schematic diagram of the structure of the liquid crystal display panel according to this embodiment. The display panel 100 is, for example, a VA type display panel, which includes a display area 110 and a non-display area 120, wherein the non-display area 120 is located at the periphery of the display area 110. The scan line GL and the data line DL are formed on the display panel 100 along the first direction and the second direction, respectively. The scan line GL and the data line DL cross each other in the display area 110. The data line DL includes a main data line DL1 and a sub data line DL2, and the main data line DL1 and the sub data line DL2 are parallel to each other and alternately arranged. Wherein, the scan line GL is used to transmit scan driving signals, the main data line DL1 is used to transmit data signals in the main pixel area, and the secondary data line DL2 is used to transmit data signals in the sub pixel area.

[0055] The display ...

Embodiment 2

[0065] This embodiment provides a specific structure of the voltage inversion circuit. Such as Figure 4 As shown, the reverse unit includes four transistors T1, T2, T3, and T4 of the same channel type, and a capacitive element C3.

[0066] Among them, the transistor T1 is equivalent to a specific example of a sampling voltage switch, the transistor T2 is equivalent to a specific example of a reference voltage switch, the transistor T3 is equivalent to a specific example of an output voltage switch, and the transistor T4 is equivalent to a specific example of an initialization switch. The transistors T1, T2, T3, and T4 are, for example, N-type thin film transistors (TFT).

[0067] In this embodiment, the voltage dividing unit includes capacitors C1 and C2 connected in series. The input terminal of the first voltage dividing capacitor C1 is connected to the main data line DL1 and receives the data signal voltage Vm of the main pixel area; the input terminal of the second voltage di...

Embodiment 3

[0085] The difference from the second embodiment is that two transistors T1' and T4' are added to the sampling voltage switch and the initialization switch in this embodiment. Such as Figure 5 As shown, the gate and source of T1' are short-circuited and coupled to the first clock source to receive the first clock signal CLK1. The drain of T1' is coupled to the gate of T1. The gate and source of T4' are short-circuited and coupled to the first clock source to receive the first clock signal CLK1. The drain of T4' is coupled to the gate of T4.

[0086] The transistors T1' and T4' can make the reverse unit work more stable. Specifically, in the t1 time period, when the first clock signal CLK1 transitions from low level to high level, the sampling voltage switch and the initialization switch can be quickly turned on, and when the first clock signal CLK1 transitions from high level to At low level, the sampling voltage switch and the initialization switch can be cut off quickly.

[...

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PUM

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Abstract

The invention discloses a voltage conversion circuit, a display panel and a driving method. The voltage conversion circuit includes a voltage dividing unit, which receives the data signal voltage of the main pixel area, and divides the data signal voltage of the main pixel area to output an intermediate voltage; The intermediate voltage is inverted under control to obtain the data signal voltage of the sub-pixel area, so that the polarity of the pixel voltage in the sub-pixel area is opposite to that of the main pixel area. The invention can improve the display quality of the panel while improving the color shift phenomenon in the VA display mode.

Description

Technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a voltage conversion circuit, a display panel and a driving method thereof. Background technique [0002] In the prior art, LCD (Liquid crystal displays) is a widely used flat panel display, which uses a liquid crystal switch to modulate the intensity of the light field of the backlight to realize screen display. The LCD has a variety of display modes. Among them, the VA (Vertical Alignment) mode is a common display mode that has the advantages of high contrast, wide viewing angle, and no friction alignment. However, since the VA display adopts a vertically rotating liquid crystal, the difference in the birefringence of the liquid crystal molecules is relatively large, resulting in a serious color shift problem under a large viewing angle. [0003] At present, the mainstream method to solve the problem of VA display color shift is the 8-domain improvement technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/3688G02F1/13624G09G3/3614G09G3/3655G09G2320/0219G09G2320/0242G02F1/134354G09G3/3696G09G2310/08G09G2320/0247G09G2330/02
Inventor 徐洪远
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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