Bichromatic Display Subpixel Rendering for Infrared Overlay
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Solution Overview
Problem
Current subpixel arrangements in image display systems, particularly those with two saturated primary colors, face challenges in achieving optimal cost/performance ratios and effective rendering of both visible and non-visible light sources, such as infrared, while dealing with limitations in modulation transfer function and luminance efficiency.
Innovation Solution
The implementation of subpixel repeating groups with metameric pairs, such as red and cyan, arranged in checkerboard patterns, along with the use of gamut mapping and subpixel rendering techniques, allows for improved information efficiency and luminance modulation, enabling brighter images and effective rendering of achromatic colors, including white, which can combine visible and infrared data sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional subpixel arrangements with two saturated primary colors are used, then manufacturing cost is reduced, but information efficiency and luminance modulation are insufficient
Solution Approach 1:
The display system segments the color information by using two saturated primary colors (e.g., red and cyan) instead of three, and compensates for the reduced color information through subpixel rendering techniques that process image data at a higher resolution than the physical pixel grid, thereby maintaining information efficiency while reducing manufacturing complexity
Solution Approach 2:
The patent changes the parameter of primary color count from three to two saturated primary colors, and compensates for the information loss by implementing subpixel rendering that utilizes metameric relationships between colors, allowing the display to represent a wider gamut than the physical subpixels would suggest
2Device complexity
If conventional subpixel arrangements are used, then device complexity is reduced, but modulation transfer function response is limited
Solution Approach 1:
The patent extends the display system's capability into another dimension by processing and displaying non-visible light sources (e.g., infrared) alongside visible light, using subpixel rendering to combine these different spectral dimensions into a unified image output, thereby improving MTF response across multiple spectral bands without increasing physical subpixel complexity
3Use of energy by moving object
If two saturated primary colors are used, then luminance efficiency is improved, but ability to render achromatic colors is reduced
Solution Approach 1:
The patent changes the color rendering approach by using subpixel rendering to synthesize achromatic colors (grays, whites) through controlled combinations of the two saturated primary colors, rather than relying on a third achromatic subpixel, thereby maintaining luminance efficiency while achieving versatile color rendering including achromatic ranges
4Productivity
If conventional subpixel rendering is used, then processing of visible light is adequate, but processing of non-visible light sources is insufficient
Solution Approach 1:
The patent implements a universal subpixel rendering system that can process multiple types of light sources (visible and non-visible such as infrared) through the same display hardware, using gamut mapping and subpixel rendering algorithms to adaptively handle different spectral inputs and produce unified visual output, thereby achieving multi-functional processing capability
Data Source
AI summary
A display system includes a subpixelated display panel having subpixels in two saturated primary colors. In one embodiment, the primary colors are selected so as to be a substantially metameric pair for an achromatic color such as white. Information display efficiencies arise from utilizing a checkerboard arrangement for the two primary colored subpixels and from using subpixel rendering algorithms to render an image on the display. The bichromatic display may display a black and white image combined with a monochromatic image, or may provide the capability to overlay a first image from a first image source carried on a chromatic channel onto a second image from a second image source carried on a luminance channel, where the first image source detects light wavelengths that the Human Vision System is not sensitive to, such as infrared light. This latter embodiment of the bichromatic display system is suitable for night vision devices.