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Method and device for obtaining electrical data of pixel unit, and array substrate

A pixel unit and array substrate technology, applied in the field of pixel data compensation, can solve problems such as large deviation in calculation compensation amount, large noise data error, and influence on compensation effect, and achieve the effect of improving precision, eliminating influence, and improving accuracy

Active Publication Date: 2020-11-17
BOE TECH GRP CO LTD
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Problems solved by technology

When the Mux multiplexer in the external compensation circuit selects the acquisition channel by switching the switch, the GOA level VGH / VGL of the pixel unit will generate voltage fluctuations in the initial stage of establishment, and will be coupled to the sensing line (Sensing Line) through parasitic capacitance. As a result, the noise data extracted by the analog-to-digital converter ADC in the external compensation circuit has a large error, such as a voltage span exceeding one gray scale, resulting in a large deviation when calculating the compensation amount in the subsequent process, which seriously affects the compensation effect.

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  • Method and device for obtaining electrical data of pixel unit, and array substrate
  • Method and device for obtaining electrical data of pixel unit, and array substrate
  • Method and device for obtaining electrical data of pixel unit, and array substrate

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[0060] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The exemplary described embodiments below do not represent all embodiments consistent with the present invention. Rather, they are merely examples of arrangements consistent with aspects of the invention as recited in the appended claims.

[0061] An embodiment of the present invention provides an array substrate, see figure 1 , including the pixel unit 10 and an external compensation unit 20 other than the pixel unit. It should be noted that the number of external compensation units 20 and the number of pixel units 10 are one-to-many units, that is, one external compensation unit 20 can detect electrical data of multiple pixel units 10 . Wherein, each pixel unit 10 i...

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Abstract

The invention relates to a method and a device for obtaining electrical data of a pixel unit, and an array substrate. The array substrate comprises a pixel unit and an external compensation unit. Eachpixel unit comprises a detection switch device; when the detection switching device is turned on, the external compensation unit is used for obtaining first data, and the first data comprises noise data caused by level jump in the external compensation unit; when the detection switching device is closed, the external compensation unit is connected to the pixel unit and used for obtaining second data, and the second data comprises noise data caused by level jump in the external compensation unit and electrical data of the pixel unit; and the external compensation unit is also used for acquiring electrical data according to the first data and the second data. According to the method, the influence of the level jump noise on the electrical data can be eliminated, the precision of acquiring the electrical data can be improved, and the accuracy of subsequently acquired compensation data can be improved.

Description

technical field [0001] The present invention relates to the technical field of pixel data compensation, in particular to a method and device for acquiring electrical data of a pixel unit, and an array substrate. Background technique [0002] At present, in AMOLED displays, the existing relatively mature internal compensation technology obviously cannot meet its development needs, so it is imperative to develop external compensation technology. However, in the current external compensation technology, the external compensation circuit adopts the idea of ​​time-division multiplexing to separately collect noise data of each pixel unit. When the Mux multiplexer in the external compensation circuit selects the acquisition channel by switching the switch, the GOA level VGH / VGL of the pixel unit will generate voltage fluctuations in the initial stage of establishment, and will be coupled to the sensing line (Sensing Line) through parasitic capacitance. As a result, the noise data ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225G09G3/00
CPCG09G3/3225G09G3/006G09G3/3233G09G2300/0819G09G2310/0297G09G2310/0291G09G2310/0294G09G2320/0295G09G3/325G09G2300/0804G09G2310/061
Inventor 杨华玲殷新社
Owner BOE TECH GRP CO LTD
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