Gamma Value Tuning for Display Panels
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Solution Overview
Problem
Automated gamma value adjustment systems in TFT-LCD production often result in color shifts and white balance reversal due to large differences between target and actual gamma values, leading to suboptimal display quality.
Innovation Solution
A method and device for tuning gamma values in display panels, which involves setting preset gamma value intervals, acquiring brightness values, calculating gamma values, and adjusting them within these intervals to maintain a linear relationship between brightness and gray scale changes, thereby reducing color shifts and improving white balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated gamma value adjustment system adjusts gamma values based on target value 2.2, then adjustment efficiency is improved, but color accuracy deteriorates due to white balance reversal when difference is large
Solution Approach 1:
The gamma value adjustment range is segmented into multiple intervals (first gamma value interval and second gamma value interval) based on the calculated gamma value. By dividing the adjustment process into segments, the system applies different adjustment strategies for different gamma value ranges, preventing white balance reversal while maintaining adjustment efficiency.
Solution Approach 2:
The system dynamically changes the target gamma value parameter based on the calculated gamma value. When the calculated gamma value falls into different intervals, the system adjusts to different target gamma values (first target gamma value or second target gamma value), optimizing both adjustment efficiency and color accuracy for different initial conditions.
2Measurement precision
If gamma value is adjusted significantly to meet target value, then gamma precision is improved, but white balance stability deteriorates due to reversal
Solution Approach 1:
The system dynamically determines the adjustment target based on the calculated gamma value. The target gamma value is not fixed but adapts dynamically according to the initial gamma measurement, allowing the system to achieve precise gamma adjustment while maintaining white balance stability through context-aware parameter selection.
Solution Approach 2:
The gamma value adjustment is segmented into different ranges with different target values. This segmentation prevents excessive adjustment that would cause white balance reversal, as each segment has an appropriately chosen target value that achieves precision without destabilizing the white balance.
Data Source
AI summary
Disclosed are a gamma value tuning method of a display panel, which comprises the following steps: setting a preset gamma value interval according to a parameters of a display panel to be tested; acquiring a brightness value of a gray scale on the display panel to be tested; calculating a gamma value corresponding to the brightness value of the gray scale; adjusting the gamma value to the first gamma value when the gamma value is smaller than the first gamma value of the preset gamma value interval; adjusting the gamma value to the second gamma, when the second gamma value in the gamma value is larger than the preset gamma value interval.