Display Device Gamma Compensation for Full-Screen Uniformity
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Solution Overview
Problem
Current display technologies face challenges in implementing full-screen displays due to the presence of cameras, which restrict screen design and result in limited screen sizes, as well as issues with gamma correction across different pixel resolutions, leading to non-uniform image quality and data bit loss.
Innovation Solution
A display device is designed with separate data line groups for high and low resolution areas, utilizing gamma compensation voltage generation units to provide tailored gamma compensation voltages for each resolution, allowing for uniform image quality across the screen and enabling full-screen displays without data bit loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a sensing area with low-resolution pixels is provided to implement full-screen display, then screen size is improved, but image quality uniformity deteriorates due to brightness and color differences between low-resolution and high-resolution pixels
Solution Approach 1:
The patent applies local quality by providing different gamma compensation voltages to different resolution areas. The sensing area (low-resolution) and display area (high-resolution) receive tailored gamma compensation voltages through separate data line groups, ensuring each area achieves optimal image quality characteristics suited to its resolution level while maintaining overall uniformity across the full screen.
Solution Approach 2:
The patent changes the gamma compensation voltage parameter differently for low-resolution and high-resolution pixels. By adjusting the gamma compensation voltage according to the resolution of each pixel group, the patent compensates for the inherent brightness and color differences, achieving uniform image quality across areas with different resolutions.
2Power
If analog gamma is set high for sensing area requiring high drive voltage, then drive capability is improved, but data bit loss occurs in display area
Solution Approach 1:
The patent segments the data line system into separate data line groups: a first data line group for high-resolution pixels in the display area, and a second data line group for low-resolution pixels in the sensing area. This segmentation allows independent control of drive voltages and gamma compensation for each area, preventing data bit loss in the display area while providing sufficient drive voltage to the sensing area.
3Manufacturing precision
If separate data line groups are provided for high and low resolution areas, then image quality uniformity is improved, but device complexity increases
Solution Approach 1:
The patent divides the data line system into separate data line groups corresponding to different resolution areas. This segmentation enables independent gamma compensation control for each area, achieving uniform image quality across the full screen while managing the complexity through systematic organization of data lines and compensation circuits.
Data Source
AI summary
The display device includes a first data line group including data lines connected to pixels arranged at a first resolution; a second data line group including data lines connected to pixels arranged at the first resolution and pixels arranged at a second resolution; a first gamma compensation voltage generation unit that divides a first reference voltage and outputs a gamma compensation voltage; a second gamma compensation voltage generation unit that divides a second reference voltage and outputs gamma compensation voltages; a first data drive unit that converts pixel data into the gamma compensation voltage output from the first gamma compensation voltage generation unit and outputs a data voltage to the first data line group; and a second data drive unit that converts pixel data into the gamma compensation voltage output from the second gamma compensation voltage generation unit and outputs a data voltage to the second data line group.