Primary Color Subpixel Voltage Compensation for Display Mura
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Solution Overview
Problem
Existing display technologies cannot effectively eliminate color mura in display pictures, as they rely solely on gray mura information for voltage compensation, failing to address color mura issues, which degrade the display effect.
Innovation Solution
A voltage compensation device for primary color subpixels that determines the display grayscale value and performs voltage compensation using either primary color mura information for high brightness or gray mura information for low brightness, ensuring effective elimination of both general and color mura.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage compensation is performed using only gray mura information, then general mura can be eliminated, but color mura cannot be eliminated
Solution Approach 1:
The patent segments the mura compensation process into two distinct parts: gray mura compensation using gray test picture information, and color mura compensation using color test picture information. By dividing the compensation task into separate modules that handle different types of mura independently, the system can effectively address both general mura and color mura without interference between the two compensation processes.
Solution Approach 2:
The patent adds a new dimension to the traditional gray-scale mura compensation by introducing color information processing. Instead of solely relying on gray-level data, the system incorporates color test pictures to capture color mura characteristics, thereby expanding the compensation capability from one dimension (gray scale) to another dimension (color space).
2Device complexity
If voltage compensation is performed on all subpixels using gray mura information, then processing is simplified, but color-specific mura issues remain unaddressed
Solution Approach 1:
The patent applies local quality by treating different subpixel types (red, green, blue) with specialized compensation methods tailored to their specific characteristics. Instead of applying a uniform gray mura compensation approach to all subpixels, the system uses color-specific mura information from color test pictures to compensate for color mura in each primary color subpixel individually, thereby improving color mura elimination while maintaining reasonable system complexity.
3Ease of manufacture
If only gray test pictures are used for mura detection, then the detection process is simple, but color mura information is not captured
Solution Approach 1:
The patent performs preliminary action by capturing color mura information in advance through color test pictures before actual display operation. The system pre-acquires color mura characteristics using dedicated color test pictures, stores this information, and then applies it during normal operation to eliminate color mura. This preliminary capture of color information ensures that color mura data is available without adding complexity to the real-time detection process.
Data Source
AI summary
The present invention provides a device and a method for compensating a voltage of a primary color subpixel, and a display device. The voltage compensation device includes: a grayscale determination module for determining whether a display grayscale value corresponding to a data voltage of the primary color subpixel is larger than a preset grayscale value; a first compensation module for performing voltage compensation on the primary color subpixel according to primary color mura information acquired in advance in a primary color test picture, when the display grayscale value is determined to be larger than the preset grayscale value; and a second compensation module for performing voltage compensation on the primary color subpixel according to gray mura information acquired in advance in a gray test picture, when the display grayscale value is determined to be equal to or smaller than the preset grayscale value.