Display Panel Drive Method for Color Cast Reduction
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Solution Overview
Problem
Existing display technologies face challenges in effectively controlling sub-pixel brightness to reduce color cast and improve display uniformity, particularly when current original gray-scale values are uniform across multiple continuous display frames.
Innovation Solution
A drive method for a display panel that converts uniform current original gray-scale values into first and second target gray-scale values, where the first target gray-scale value is greater than the original values and the second target gray-scale value is smaller, allowing for alternating data voltage inputs to adjacent sub-pixel units in a display frame to achieve mixed brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uniform current original gray-scale values are used across multiple continuous display frames, then the display process is simple and fast, but color cast occurs and display uniformity deteriorates
Solution Approach 1:
The patent segments the uniform gray-scale value into two different target gray-scale values (first target gray-scale value and second target gray-scale value). These segmented values are then alternately applied to adjacent sub-pixel units in different display frames, transforming a uniform input into a differentiated output pattern that prevents color cast while maintaining processing efficiency.
Solution Approach 2:
The patent implements periodic action by alternating between first target gray-scale value and second target gray-scale value in different display frames. Specifically, in odd-numbered display frames, the first target gray-scale value is applied to first sub-pixel units while the second target gray-scale value is applied to second sub-pixel units, and this pattern reverses in even-numbered frames, creating a periodic compensation mechanism that eliminates color cast.
2Manufacturing precision
If alternating data voltages are applied to adjacent sub-pixel units, then color cast is reduced and display uniformity is improved, but the control complexity increases
Solution Approach 1:
The patent applies local quality by differentiating the gray-scale values for different spatial locations. Specifically, first sub-pixel units and second sub-pixel units (which are adjacent to each other) receive different target gray-scale values based on their spatial positions and the current display frame number. This localized differentiation compensates for color cast in specific regions without requiring complex global adjustments.
Solution Approach 2:
The patent changes the gray-scale value parameter dynamically based on the display frame number and sub-pixel unit type. By converting the current original gray-scale value to either a first target gray-scale value or a second target gray-scale value according to the frame parity (odd or even) and spatial position, the system achieves adaptive parameter adjustment that improves display uniformity through relatively simple control logic.
3Manufacturing precision
If target gray-scale values are converted from original gray-scale values, then mixed brightness is achieved to reduce color cast, but the processing time increases
Solution Approach 1:
The patent implements preliminary action by pre-establishing the conversion relationship between original gray-scale values and target gray-scale values (first and second target gray-scale values) before actual display rendering. The conversion logic is prepared in advance, allowing the system to quickly select and apply the appropriate target gray-scale value based on the current frame number and sub-pixel unit type, thereby minimizing processing time during actual display operations.
Data Source
AI summary
A drive method for a display panel, and a display apparatus. The drive method includes: when current original gray-scale values corresponding to sub-pixels in the same region are the same in a plurality of continuous display frames, converting the current original gray-scale values into a first target gray-scale value and a second target gray-scale value; in a current display frame of the plurality of continuous display frames, controlling a data voltage corresponding to the first target gray-scale value to be input to a first sub-pixel unit in the region, and controlling a data voltage corresponding to the second target gray-scale value to be input to a second sub-pixel unit in the region, where each of the first sub-pixel unit and the second sub-pixel unit includes at least one sub-pixel.