Adaptive Color Correction for Display Backlight Modulation
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Solution Overview
Problem
Backlight modulation in display devices causes spectral shifts, leading to inconsistent and inaccurate color output, as existing color correction techniques assume a fixed backlight level and fail to account for changes in luminance adjustments.
Innovation Solution
Generating and applying multiple color correction matrices specific to different backlight levels to compensate for spectral shifts and inter-color channel cross-talk, ensuring accurate color output across varying backlight settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If backlight level is adjusted to reduce power consumption, then energy efficiency is improved, but color accuracy deteriorates due to spectral shifts
Solution Approach 1:
The system dynamically adjusts color correction parameters based on the current backlight level. Multiple color correction matrices are pre-calibrated for different backlight levels (e.g., 100%, 80%, 60%, 40%), and the appropriate matrix is selected and applied in real-time based on the detected backlight level, enabling adaptive color compensation as power consumption requirements change
Solution Approach 2:
The invention changes the parameters of color correction matrices according to backlight level. By calibrating and storing multiple sets of color correction coefficients corresponding to different backlight levels, the system can switch between parameter sets to maintain color accuracy across varying luminance conditions while optimizing power consumption
2Device complexity
If a single color correction matrix is used for all backlight levels, then device complexity is reduced, but color consistency deteriorates across different luminance settings
Solution Approach 1:
The color correction system is segmented into multiple discrete correction matrices, each optimized for a specific backlight level range. This segmentation allows the system to handle different luminance conditions with dedicated correction parameters, improving color consistency without requiring a single overly complex adaptive algorithm
Solution Approach 2:
Multiple color correction matrices are pre-calibrated and stored in memory during manufacturing or initialization. This preliminary preparation eliminates the need for real-time complex calculations, allowing the system to simply select and apply the appropriate pre-computed matrix based on the current backlight level, thus maintaining color consistency without adding significant operational complexity
Data Source
AI summary
The techniques of this disclosure are applicable to backlight display devices. For such devices, the backlight may have different backlight intensity settings in order to promote power conservation. The techniques of this disclosure may apply different adjustments to the display, depending on the backlight intensity setting. In one example, different color correction matrices may be applied for different backlight settings in order to achieve desirable adjustments in the device at the different backlight settings. The adjustments described herein may address chrominance shifts due to different backlight settings as well as cross-talk between color channels. The techniques may also be applicable to organic light emitting diode (OLED) displays that have different luminance settings, and some described techniques may be applicable to displays that have static or fixed luminance output.