Display Panel Gamma Tuning for Brightness Reversal Control
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Solution Overview
Problem
Display panels experience brightness reversal and undesirable phenomena such as crosstalk and residual shadow due to large precision steps in adjusting dimming values, affecting display quality.
Innovation Solution
Setting the same voltage gamma max power and voltage gamma small power for multiple dimming values, calculating and writing a gamma register value for 0 gray scale to maintain consistent display performance, reducing the occurrence of brightness reversal and other issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If different voltage gamma max powers are set for different dimming values to reduce crosstalk and residual shadow, then display quality is improved, but brightness reversal occurs due to large precision steps in voltage adjustment
Solution Approach 1:
The patent changes the parameter of voltage gamma max power from being dynamically adjusted per dimming value to being fixed across multiple dimming values. This parameter change eliminates the brightness reversal issue caused by large precision steps while maintaining display quality through alternative compensation methods
Solution Approach 2:
The patent segments the dimming values into groups, where each group shares the same voltage gamma max power setting. This segmentation allows the system to avoid problematic voltage transitions while still providing dimming control across the full range
2Reliability
If voltage gamma max power is adjusted with high precision to avoid brightness reversal, then brightness consistency is improved, but crosstalk and residual shadow increase
Solution Approach 1:
The patent changes the voltage gamma max power from a finely-adjusted parameter to a coarser, fixed parameter across dimming groups, eliminating brightness reversal while managing crosstalk through the grouping strategy rather than continuous adjustment
3Manufacturing precision
If continuous adjustment of voltage gamma max power is used to maintain display quality across dimming values, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent simplifies the control system by segmenting dimming values into groups that share common voltage gamma max power settings, reducing the complexity of continuous adjustment while maintaining adequate display quality across the full dimming range
Data Source
AI summary
A gamma tuning method, apparatus, device, and storage medium and belongs to the field of display technology. The method includes: selecting a plurality of different target dimming values, and correspondingly setting, for each of the target dimming values, a same voltage gamma max power and a same voltage gamma small power; for each of the target dimming values, obtaining a gamma register value for 0 gray scale under the target dimming value according to the voltage gamma max power, the voltage gamma small power, a maximum gamma register value, and a target voltage for 0 gray scale under the target dimming value; and writing the gamma register value for 0 gray scale under the target dimming value into a gamma register of the display panel.