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a display device

A technology for display devices and driving transistors, which is applied to static indicators, instruments, etc., can solve problems such as uneven display brightness of the display screen, and achieve the effect of uniform luminous brightness

Active Publication Date: 2020-12-04
YUNGU GUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a display device, which solves the technical problem of uneven display brightness of the display screen in the prior art

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Embodiment Construction

[0024] As mentioned in the background art, in the prior art, the luminance of each pixel in the display screen is not uniform, so that the display brightness of the display screen is not uniform. The inventor found that the reason for this problem lies in the driver in the pixel circuit Thin film transistors work in the saturation region, and the channel current is equal to the light emitting current of the light emitting device. However, due to manufacturing reasons, the threshold voltage of each driving thin film transistor will be different, which will cause uneven luminance of each pixel, resulting in The display brightness of the display is uneven.

[0025] Based on this, the present invention provides a display device. Before driving a pixel to emit light, a detection circuit is used to detect the threshold voltage of the pixel. During the process of driving the pixel to emit light, the threshold voltage is used for the compensation operation of the driving circuit. , so...

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Abstract

The invention provides a display device. Before a pixel is driven to emit light, threshold voltage of a pixel is detected by using a detection circuit; in the process of driving the pixels to emit light, the threshold voltage is used for compensation operation of the driving circuit, so that the current flowing through the light-emitting device is irrelevant to the threshold voltage of the drivingtransistor, the light-emitting brightness of each pixel can be the same, and the light-emitting brightness of the display screen is uniform.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a display device. Background technique [0002] In the prior art, the display screen uses organic materials to make light-emitting devices, and thin film transistors are used to construct pixel circuits. Pixels are arranged in an array, and the display screen is refreshed in a progressive scanning manner. However, even if the driving voltages are completely the same, the luminous brightness of each pixel is not necessarily the same, which causes the problem of uneven luminous brightness of the display screen. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a display device, which solves the technical problem of uneven display brightness of the display screen in the prior art. [0004] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3291G09G3/3266
CPCG09G3/3266G09G3/3291G09G2320/0233
Inventor 解红军
Owner YUNGU GUAN TECH CO LTD
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