Ambient Light Aware Display Color Gamut Correction
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Solution Overview
Problem
Backlit display devices face reduced image quality due to desaturated images in varying ambient lighting conditions, particularly from bright ambient light which causes reflected light and differing color intensities, leading to an incorrect white point.
Innovation Solution
An apparatus with sensor input and color gamut correction logic adjusts the output of display light sources to change the saturation of primary colors, using a lookup table to adjust light source output levels based on ambient light conditions, ensuring the perceived white point remains consistent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light sources of multiple colors are simultaneously illuminated to form primary colors, then the display can generate a wide range of images, but the image quality deteriorates in bright ambient light conditions due to reflected ambient light causing desaturation
Solution Approach 1:
The patent implements dynamic adjustment of light source output levels based on detected ambient lighting conditions. The system continuously monitors ambient light and adjusts the intensity and chromaticity of display light sources in real-time to maintain optimal color saturation and white point, transforming the static display system into an adaptive one that responds to environmental changes.
Solution Approach 2:
The patent changes the operating parameters of light sources by adjusting their output levels and chromaticities according to ambient lighting conditions. Through lookup tables storing pre-determined adjustment values for different ambient light scenarios, the system modifies light source parameters to compensate for ambient light effects, maintaining faithful color reproduction across varying environmental conditions.
2Manufacturing precision
If the display adjusts light source output to maintain color saturation in ambient light, then image quality improves, but the system complexity increases due to sensor input and color gamut correction logic
Solution Approach 1:
The patent employs lookup tables that contain pre-calculated correction values for various ambient lighting conditions. Instead of performing complex real-time calculations, the system pre-computes the optimal light source adjustment parameters and stores them for quick retrieval, significantly reducing the computational burden and system complexity while maintaining high image quality.
Solution Approach 2:
The patent introduces lookup tables as an intermediary between the ambient light sensor and the light source control system. These tables act as a pre-processing layer that translates ambient light conditions into appropriate correction values, simplifying the control logic and reducing the complexity of the overall system architecture.
3Manufacturing precision
If the display dynamically adjusts primary color saturation based on ambient light, then faithful image reproduction is achieved, but processing requirements increase
Solution Approach 1:
The patent pre-computes and stores color gamut correction values in lookup tables for various ambient lighting conditions. This preliminary action eliminates the need for complex real-time color space transformations and iterative calculations, allowing the system to achieve faithful image reproduction through simple table lookups and direct parameter adjustments.
Solution Approach 2:
The patent extracts the computationally intensive color correction calculations from the real-time processing path and places them in pre-computed lookup tables. This separation removes the heavy processing burden from the critical display refresh path, maintaining high image reproduction fidelity while improving processing efficiency.
Data Source
AI summary
Systems, apparatus, and methods are disclosed herein for adjusting the operation of a display based on ambient lighting conditions. One such apparatus includes a sensor input for receiving sensor data indicative of an ambient lighting condition, output logic and color gamut correction logic. The output logic is configured to simultaneously cause light sources of at least two colors to be illuminated to form each of at least three generated primary colors. The color gamut correction logic is configured to cause the output logic to adjust the output of at least one display light source for each of the at least three generated primary colors to change the saturation of each of the at least three generated primary colors based on the received ambient light sensor data.