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A detection circuit and a liquid crystal display device

A technology for detecting circuits and display panels, used in measuring devices, static indicators, optical instrument testing, etc., can solve problems such as screen flicker, grayscale screen and solid-color screen flicker, inability to accurately detect the quality of display panels, and save borders. , the effect of suppressing flicker

Active Publication Date: 2021-09-21
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the detection process of the liquid crystal display device, if the polarities of two adjacent pixels on the display panel are the same, there will be flickering of the grayscale picture and the solid color picture, so that the quality of the display panel cannot be accurately detected.
figure 1 It is the first detection circuit and waveform diagram in the prior art, such as figure 1 As shown, the detection circuit uses a plurality of switching elements, three data signal lines and one control signal line to make the sub-pixels on the display panel sequentially switch and receive a corresponding image signal every frame, but in the same frame, the corresponding The polarities of the driving voltages of two adjacent sub-pixels are basically the same, so the screen will flicker

Method used

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  • A detection circuit and a liquid crystal display device
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  • A detection circuit and a liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] The detection circuit 100 of this embodiment is used to detect the display panel 200. The display panel 200 includes a plurality of pixel units arranged in an array, and each pixel unit includes three sub-pixels for displaying different colors, respectively the first sub-pixel (R1, R2, etc.), the second sub-pixel (G1, G2, etc.) and the third sub-pixel (B1, B2, etc.), the detection circuit 100 includes a plurality of switching elements T, at least two control signal lines and at least three data signals Wire.

[0032] Each of the multiple switching elements T includes a control terminal, a first channel terminal, and a second channel terminal. The first channel terminals of the multiple switching elements T are all connected to the same sub-pixel adjacent to each row along the column direction. The multiple switching elements T The control terminals of the plurality of switching elements T are all connected to a corresponding one of the at least two control signal lines,...

no. 2 example

[0045] R0, R1, R2, R3, R4, etc. in the drawings of this specification represent each first sub-pixel, G0, G1, G2, G3, G4, etc. represent each second sub-pixel, B0, B1, B2, B3, B4, etc. denote the respective third sub-pixels. Please refer to image 3 , image 3 It is a detection circuit 100 and a waveform diagram of an embodiment. image 3 In the detection circuit shown, the first channel ends of the plurality of switch elements (T) are connected to the upper and lower corresponding sub-pixels of any two adjacent rows. Now, the six sub-pixels of two adjacent pixel units in each row are the first sub-pixel R1, the second sub-pixel G1, the third sub-pixel B1, the fourth sub-pixel R2, the fifth sub-pixel G2 and the sixth sub-pixel The sub-pixel B2 is taken as an example for description.

[0046] The structure of the detection circuit 100 of this embodiment is basically the same as that of the detection circuit 100 of the first embodiment, the only difference is that the detect...

no. 3 example

[0054] Please refer to Figure 5 , Figure 5 It is a detection circuit 100 and a waveform diagram of an embodiment. The structure of the detection circuit 100 of this embodiment is basically the same as that of the detection circuit 100 of the second embodiment. Pixels are connected.

[0055] Specifically, in the first time period of the first frame, the control signal on the first control signal line ADD1 is at a high level, and the corresponding three switching elements T are turned on, so that the six sub-pixels of any adjacent two groups of pixel units Three of the sub-pixels are respectively connected to the three data signal lines one by one and obtain corresponding polarities. For example, an embodiment such as Figure 5 As shown, in the first time period of the first frame, the control signal on the first control signal line ADD1 is at a high level, and the corresponding three switching elements T are turned on, so that the six sub-pixels of any adjacent two groups...

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Abstract

The invention provides a detection circuit, which includes a plurality of switch elements, at least three data signal lines and at least two control signal lines. In each time period of each frame, if the control signal on one of the control signal lines is at a high level, the corresponding multiple switching elements are controlled to be turned on, and then the connection between some sub-pixels and the at least three data signal lines is controlled. Corresponding one of the data signal lines is connected to obtain the corresponding polarity; correspondingly, each time a frame passes, the corresponding control signals on the at least two control signal lines pass through the plurality of switching elements so that all sub-pixels are connected to the A corresponding one of the at least three data signal lines is connected to obtain a corresponding polarity, and polarities of the same sub-pixel of adjacent pixel units in the same row are reversed. The invention also provides a liquid crystal display device. The detection circuit and the liquid crystal display device of the present invention can suppress the flickering of the gray-scale picture and the solid-color picture, and save more frames.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a detection circuit and a liquid crystal display device. Background technique [0002] With the development of liquid crystal display technology, people's requirements for display panels are getting higher and higher, and the competition in the LCD panel industry is becoming more and more fierce, which requires panel manufacturers to have superb technology and high yield. [0003] However, during the detection process of the liquid crystal display device, if two adjacent pixels on the display panel have the same polarity, grayscale images and solid color images will flicker, so that the quality of the display panel cannot be accurately detected. figure 1 It is the first detection circuit and waveform diagram in the prior art, such as figure 1 As shown, the detection circuit uses a plurality of switching elements, three data signal lines and one control signal line to make t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00G09G3/36G01M11/00
CPCG01M11/00G09G3/006G09G3/36
Inventor 王金烨张鼎
Owner KUSN INFOVISION OPTOELECTRONICS
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