Method and device for generating gray scale correction table of curved surface display screen

Abstract

The embodiments of the present invention disclose a method and a device for generating a gray scale correction table of a curved surface display screen, which relate to the field of image display and are used for improving the display uniformity of the curved surface display screen and then promoting the display effect of the curved surface display screen. In the embodiments, the method comprises the steps of defining an actual brightness table for expressing the actual brightness value of each pixel unit under a preset gray scale; defining a target brightness table for expressing the target brightness value to be arrived at by each pixel unit under the preset gray scale according to the actual brightness value mean of a plurality of sampling pixel units; for a random pixel unit in the curved surface display screen, comparing the difference between the actual brightness value and the target brightness value of the pixel unit under the preset gray scale, and calculating the corresponding gray scale correction value of the pixel unit under the preset gray scale according to the comparison result and a gamma curve corresponding to the area where the pixel unit is located in the curved surface display screen; and generating the gray scale correction table corresponding to the pixel unit, thus solving the above problems.

Description

technical field [0001] The invention relates to the field of image display, in particular to a method and device for generating a gray scale correction table of a curved display screen. Background technique [0002] With the development of display technology, display screens such as televisions and monitors are gradually developing towards larger screens and ultra-high definition. On the one hand, products of 55 inches and above have gradually become the mainstream; on the other hand, UHD products of 3840×2160 (4K×2K) based on UHD (Ultra High Definition) display technology are rapidly popularizing. Among them, the UD display technology is the next-generation TV display technology of HD (High Definition, high definition) and FullHD (full high definition). [0003] Existing display screens can be classified into flexible display screens (also referred to as curved display screens) and rigid display screens (also referred to as flat display screens). Generally speaking, a cur...

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Problems solved by technology

[0004] However, the current curved display screens have the following defects: First, some irregular changes will occur in the optical properties of the display screen due to stress, which will cause the image to show partial color cast, poor uniformity, bright spots, and color blocks. etc.; Second, due to the deformation of the module, the parameter performance design of the optical components (light guide plate, reflective light path) has changed slightly, resulting in a decrease in the uniformity index of the backlight

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