Transflective Display Image Adaptation for Readability and Flare
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Solution Overview
Problem
Transflective displays face issues such as flare and color desaturation in reflective mode, tone rendering curve differences between reflective and transmissive modes, and reduced text readability due to average reflectance reduction, especially in bright ambient light conditions.
Innovation Solution
An image analysis method that identifies first and second pixels, adapting the image by changing the reflectance of first pixels relative to second pixels to create an adapted image for improved text readability and color fidelity, using spatial modulation and black frame insertion to mitigate the effects of ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reflectance is increased for text readability in bright ambient light, then text readability is improved, but flare and color desaturation increase
Solution Approach 1:
The patent applies different reflectance values to different pixel types within the same display. Specifically, text pixels are assigned higher reflectance values to maintain readability in bright ambient light, while image pixels use lower reflectance values to minimize flare and color desaturation. This local differentiation resolves the contradiction by allowing each pixel type to have optimized properties for its specific function.
2Object-generated harmful factors
If average reflectance is reduced to minimize flare, then flare and color desaturation are reduced, but text readability deteriorates
Solution Approach 1:
Instead of uniformly reducing reflectance across all pixels, the patent implements pixel-type-specific reflectance control where text pixels maintain high reflectance for readability while image pixels use lower reflectance to reduce flare. This localized approach resolves the contradiction by preventing the trade-off from affecting the wrong pixel types.
3Ease of operation
If gamma is optimized for reflective mode, then text readability in ambient light is improved, but tone rendering in transmissive mode deteriorates
Solution Approach 1:
The patent applies different gamma correction curves to different pixel types. Text pixels use a gamma optimized for reflective mode to ensure readability in ambient light, while image pixels use a gamma optimized for transmissive mode to maintain accurate tone rendering. This resolves the contradiction by allowing mode-specific optimization for each pixel type without compromise.
4Device complexity
If a single image is used for both reflective and transmissive modes, then device complexity is reduced, but image quality deteriorates in one or both modes
Solution Approach 1:
The patent segments the image data into different pixel types (text pixels and image pixels) and applies different processing parameters to each segment. This includes different reflectance values and different gamma corrections for text versus image regions. This segmentation approach resolves the contradiction by allowing mode-specific optimization for each pixel type while maintaining a unified display system.
Data Source
AI summary
A method including analysing an image intended for display on a transflective display to identify first pixels and second pixels in the image; and creating an adapted image for display on the transflective display by changing relative reflectance of the first pixels relative to the second pixels.