Ambient Light Adaptive Display Image Processing
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Solution Overview
Problem
Conventional electronic displays, such as LCDs and OLEDs, face challenges in maintaining readability in bright ambient light conditions, particularly in direct sunlight, due to insufficient contrast and increased design complexity which raises manufacturing costs.
Innovation Solution
The system dynamically modifies images by adjusting pixel states, brightness, and gamma values based on detected ambient light levels, creating high-contrast bi-level or monochrome images, and reducing information content and increasing font size to enhance readability in bright environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional display hardware is used, then manufacturing cost is low, but readability in bright ambient light is poor
Solution Approach 1:
The system dynamically changes display parameters including gamma values, brightness levels, and contrast ratios based on detected ambient light conditions. In bright light, the display switches to higher gamma values (e.g., gamma 2.2 or higher) and adjusts pixel luminance to maintain readability without requiring specialized hardware
Solution Approach 2:
The display system dynamically adapts its characteristics in real-time based on ambient light sensing. The controller continuously monitors light levels and adjusts display parameters accordingly, transitioning between different operating modes (indoor, outdoor, direct sunlight) to optimize readability while using conventional hardware
2Reliability
If display hardware is modified to improve readability in bright light, then readability improves, but device complexity increases
Solution Approach 1:
The patent replaces physical hardware modifications with software-based image processing and parameter adjustment mechanisms. Instead of modifying the display hardware itself, the system uses image generation processing to dynamically adjust pixel values, gamma curves, and brightness levels through computational methods
Solution Approach 2:
An image generation processor acts as an intermediary between the conventional display hardware and the viewer's eye. This intermediary component processes images to optimize contrast and brightness for specific lighting conditions, effectively decoupling the simplicity of conventional hardware from the complexity of adaptive display performance
3Reliability
If image processing is applied to enhance readability, then readability in bright light improves, but processing complexity increases
Solution Approach 1:
The system applies targeted parameter changes to image data including gamma correction curves, luminance scaling, and contrast enhancement specifically optimized for bright light conditions. These processing operations focus on key parameters rather than comprehensive image manipulation, reducing computational complexity
Solution Approach 2:
The system pre-calculates and stores optimized image parameters and lookup tables for different lighting conditions. When ambient light levels change, the system quickly switches between pre-computed parameter sets rather than performing complex real-time calculations, reducing processing overhead
Data Source
AI summary
Systems and method to generate more readable modified images that are presented on electronic displays in bright ambient light, such as direct sunlight. Images normally presented in lower ambient light are modified to generate modified images that have higher contrast and that contain less information. For example, modified images contain pixels that are either “on” or “off” and may be inverted to present a black on white background image on the display. Some information, such as text fields or icons, is removed from the modified image to increase readability in bright ambient light. A backlight level of the display is also able to be increased in bright ambient light.