Display Gamma Compensation Across Multiple Refresh Rates
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Solution Overview
Problem
Display panels operating at multiple refresh rates experience visual flicker due to differences in luminance and color between refresh rates, especially noticeable at low luminance, which degrades user experience.
Innovation Solution
Apply a value offset to the default gamma value based on measured differences in luminance or color between refresh rates to generate a new gamma value, which is then used when the display panel operates at the second refresh rate, thereby reducing or eliminating visual flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the display panel operates at multiple refresh rates, then user experience is enhanced through higher refresh rates, but visual flicker occurs due to luminance and color differences between refresh rates
Solution Approach 1:
The patent adjusts gamma values as a parameter to compensate for luminance and color differences between refresh rates. By dynamically changing the gamma value based on the detected refresh rate, the display maintains consistent visual output characteristics across different refresh rates, thereby eliminating visual flicker while preserving the benefits of multiple refresh rates
Solution Approach 2:
The system detects the current refresh rate and uses this information to dynamically adjust the gamma value. This feedback mechanism ensures that the display adapts to different operating conditions by automatically selecting appropriate gamma values that maintain visual consistency across refresh rate transitions
2Device complexity
If a default gamma value is used across all refresh rates, then device complexity is reduced, but luminance and color inconsistency occurs between refresh rates
Solution Approach 1:
The patent transitions from a static gamma value approach to a dynamic one where the gamma value changes based on the refresh rate. The system automatically detects the refresh rate and adjusts the gamma value accordingly, creating a dynamic adaptation mechanism that maintains visual consistency without requiring complex manual configuration
Solution Approach 2:
By changing the gamma parameter based on refresh rate conditions, the system achieves luminance and color consistency across different operating modes. This parameter adjustment strategy allows the display to adapt its characteristics dynamically while maintaining relatively simple device architecture
Data Source
AI summary
A method may include measuring, from a device having a display panel configured to operate at a first refresh rate or a second refresh rate, a difference in luminance of the display panel between the first refresh rate and the second refresh rate for an input gray level. The method may also include applying, based on the measured difference in luminance, a value offset to a default gamma value used by the device for the input gray level when the display panel is operating at the second refresh rate, thereby generating a new gamma value. The method may further include storing, at the device, the new gamma value, where subsequent to the storing, the device is configured to override the default gamma value for the input gray level with the new gamma value when the display panel is operating at the second refresh rate.