Method and device for adaptively adjusting Demura according to display brightness
A technology of adaptive adjustment and display brightness, applied in the field of AMOLED display system, can solve the problems such as the influence of Demura compensation effect, and achieve the best compensation effect
Active Publication Date: 2020-06-05
昇显微电子(苏州)股份有限公司
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[0004] At present, due to the limitation of Flash, only one set of Demura compensation tables is configured in the AMOLED display system. This set of Demura compensation tables only meets the settings of one of the gamma lookup tables, usually the gamma lookup table settings for normal display brightness. , when the Gamma Correction module is set to a gamma lookup table with abnormal display brightness, the Demura compensation effect will be affected
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[0027] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation of the method and device for adaptively adjusting Demura according to the display brightness according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments , structure, feature and effect thereof, detailed description is as follows. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0028] figure 1 It is a schematic diagram of the flow of Demura in the background technology, and the flow is as follows: Drive IC lights up the panel and displays several gray-scale images; CCD camera takes pictures...
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The invention belongs to the technical field of AMOLED display systems, and particularly discloses a method and a device for adaptively adjusting Demura according to display brightness. The method comprises the following steps: obtaining a maximum output brightness value Lv in a first gamma lookup table under normal display brightness, and configuring a Demura compensation table; obtaining a maximum output brightness value Lv' in a gamma lookup table II under abnormal display brightness; calculating a coefficient K according to Lv and Lv'; setting a red component of a Demura input end as R, agreen component as G, and a blue component as B; calculating k*R, K*G and K*B to serve as a red input value, a green input value and a blue input value of the Demura compensation table respectively, and looking up in the Demura compensation table according to the input values to obtain compensation values delta R / delta G / delta B; and dividing the compensation values delta R / delta G / delta B by K toserve as final compensation values, and calculating a red component, a green component and a blue component of a Demura output end respectively. The compensation value of the Demura can be adaptivelyadjusted according to different gamma lookup tables, so that the Demura is ensured to have an optimal compensation effect at different display brightness.
Description
technical field [0001] The present invention relates to the technical field of AMOLED display systems, and more particularly, to a method and device for adaptively adjusting Demura according to display brightness. Background technique [0002] AMOLED (Active Matrix Organic Light Emitting Diode) has been increasingly used in high-performance displays. Due to the limitations of the crystallization process, when LTPS TFTs are fabricated on large-area glass substrates, TFTs at different positions usually have non-uniformity in electrical parameters such as threshold voltage and mobility, and this non-uniformity will translate into differences in brightness , which is perceived by the human eye, that is, the Mura phenomenon. This kind of non-uniformity in electrical parameters is difficult to completely overcome in the process. At present, manufacturers generally use Demura to compensate the brightness difference, so that the brightness of the entire panel is uniform, and the br...
Claims
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Login to View More IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G2320/0626G09G2320/0673G09G2320/0666
Inventor 张娇吴樟福秦良
Owner 昇显微电子(苏州)股份有限公司