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display device

A technology for display devices and display boards, which is applied to static indicators, cathode ray tube indicators, instruments, etc., and can solve the problems of increased control circuit scale, decreased display quality of display devices, and complicated control, etc.

Active Publication Date: 2016-02-24
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The degradation of the display quality of the display device due to the burn-in phenomenon can be solved by controlling the display elements so as to compensate for the decrease in luminance due to the burn-in when the display elements in which the burn-in occurs are driven.
In the method of measuring the temporal change data of the operation history multiple times in advance and compensating for the decrease in luminance due to the burn-in phenomenon with reference to a table storing the measured temporal change data, there is a problem that the scale of the control circuit increases and the control becomes complicated

Method used

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example 2

[0049] 3. Example 2 (Other)

[0050] [Overall Explanation of Display Device and Display Device Driving Method]

[0051] From the viewpoint of digital control, it is preferable to change the values ​​of the input signal and the video signal in steps represented by powers of two. In the display device and the display device driving method according to the embodiments of the present disclosure, the grayscale value of the video signal may be greater than the maximum value of the grayscale value of the input signal.

[0052] For example, an input signal may be subjected to 8-bit grayscale control, while a video signal may be subjected to greater than 8-bit grayscale control. For example, a configuration in which a video signal is subjected to 9-bit control can be considered, but the present disclosure is not limited to this example.

[0053] In the display device according to the embodiment of the present disclosure, as the unit time becomes shorter, the accuracy of burn compensa...

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Abstract

A display apparatus includes: a display panel that includes display elements having a current-driven light-emitting portion and that displays an image on the basis of a video signal; and a luminance correcting unit that corrects the luminance of the display elements when the display panel displays an image by correcting a gradation value of an input signal and outputting the corrected input signal as the video signal. The luminance correcting unit includes an operating time conversion factor holder, a reference operating time calculator, an accumulated reference operating time storage, a reference curve storage, a gradation correction value holder, and a video signal generator.

Description

technical field [0001] The present disclosure relates to display devices, and more particularly, to display devices that can compensate for temporal variations in brightness of display elements. Background technique [0002] Display elements having light emitting portions and display devices having such display elements are well known. For example, a display element (hereinafter, also abbreviated as an organic EL display element) having an organic electroluminescent part (hereinafter also abbreviated as an organic EL display element) utilizing electroluminescence of an organic material (hereinafter, also abbreviated as EL) can emit light with high brightness by low-voltage DC driving. The display elements that have attracted attention. [0003] Similar to liquid crystal displays, for example, in a display device including an organic electroluminescent display element (hereinafter, also abbreviated as an organic EL display device), a simple matrix type and an active matrix t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G5/10G09G3/34
CPCG09G3/3233G09G2300/0426G09G2300/0819G09G2300/0861G09G2300/0866G09G2320/0233G09G2320/041G09G2320/045G09G2320/046
Inventor 山下淳一内野胜秀
Owner JOLED INC