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Image display device and control method thereof

A technology of image display device and control method, applied in image communication, static indicator, TV, etc., capable of solving problems such as lack of practicability

Active Publication Date: 2021-02-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, it is understandable that these previous documents disclose proposals to directly measure the DC (direct current) component, so these documents may not be of practical use in view of noise

Method used

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  • Image display device and control method thereof
  • Image display device and control method thereof
  • Image display device and control method thereof

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Embodiment Construction

[0046]For display devices, maintaining the brightness balance of each pixel may be an important issue. For example, the pixels of a small display mounted on a mobile device may have the same problem. For display devices, compensating for unevenness in brightness may be an important issue. For example, this is an important issue for OLED (Organic Light Emitting Diode) display devices and high-definition displays used in mobile devices.

[0047]Generally speaking, it is possible to compensate for initial problems and / or pixel / pixel element errors by using camera data.figure 1 An example of image brightness unevenness is shown. The left side shows the example before compensation, and the right side shows the example after compensation.figure 1 , Compensates for brightness inequality.

[0048]figure 2 A schematic diagram showing an example of compensation operation on a cellular phone system.figure 2 Among them, "100" is a cellular phone system. "101" is the display device. "102" is a process...

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PUM

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Abstract

An image display device includes: a plurality of pixel elements for displaying images; a first power supply for applying a voltage to the plurality of pixel elements; a counter for outputting a counter signal; a ramp generator for receiving the A counter signal and outputting a ramp signal according to the counter signal; a second power supply for applying a voltage to the plurality of pixel elements according to the ramp signal; an amplifier for the first pixel element among the plurality of pixel elements Outputting a trigger signal when outputting current; a data driver, used to output a counter value according to the counter signal and the trigger signal; and a buffer, used to store the counter value.

Description

Technical field[0001]This application may involve, for example, an image display device and a control method of the image display device.Background technique[0002]Generally speaking, high-quality display devices are required.[0003]In the prior art, there are several methods for evaluating the degradation of a display device pixel of a focused I-V (current-voltage) characteristic or capacitance. For example, as shown below:[0004](1) U.S. Patent Application Publication No. 20090184901A1 (Organic Light-Emitting Display and Its Driving Method)[0005](2) U.S. Patent No. 8026876B2 (OLED brightness degradation compensation)[0006](3) U.S. Patent No. 7079091B2 (compensation for aging of OLED equipment)[0007]However, it is understandable that these previous documents disclose proposals for directly measuring DC (direct current) components, and therefore, these documents may not be practical in consideration of noise.Summary of the invention[0008]The following explanations are only examples, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/341
CPCG09G3/3225G09G3/3233G09G3/3275G09G2300/0819G09G2310/066G09G2320/0233G09G2320/043G09G2330/021G09G2330/028G09G2320/045G09G2330/12G09G2310/0259G09G2320/0295G09G3/3258G09G2310/0291
Inventor 冈本忠之
Owner HUAWEI TECH CO LTD