White Pixel Display Luminance and Resolution via Segmentation
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Solution Overview
Problem
Display devices using only red, green, and blue pixels suffer from reduced luminance due to the presence of color filters, which attenuate backlight light, leading to decreased image brightness.
Innovation Solution
Incorporating a white pixel without a color filter, arranged in a specific layout with color pixels, allowing for pixel sharing and rendering-driven image display, which enhances luminance and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color pixels with color filters are used to display images, then color representation is achieved, but luminance decreases due to light attenuation
Solution Approach 1:
The pixel array is segmented into distinct color pixel regions and white pixel regions. Each region serves a specific function: color pixels provide color information while white pixels provide high luminance. This segmentation allows the system to overcome the luminance limitation of color filters by strategically placing white pixels in regions requiring high brightness.
Solution Approach 2:
White pixels are designed to serve multiple functions: they provide high luminance for bright areas, can be used for rendering adjacent color pixels through spatial interpolation, and can replace color pixels in certain display conditions. This multi-functionality allows the white pixels to contribute to both luminance enhancement and color image reconstruction.
2Illumination intensity
If white pixels without color filters are added to increase luminance, then image brightness improves, but pixel layout complexity increases
Solution Approach 1:
Different regions of the display are assigned different pixel types based on local requirements. White pixels are placed in specific patterns (e.g., every other pixel in alternating columns) rather than uniformly throughout. This local differentiation optimizes luminance where needed while maintaining color accuracy in other regions, and the regular alternating pattern keeps the layout manageable.
Solution Approach 2:
Instead of making all pixels color pixels with filters and trying to maximize light transmission through filter optimization, the invention inverts the approach by using some pixels without filters (white pixels) and using rendering techniques to synthesize the missing color information from neighboring pixels.
3Measurement precision
If rendering driving with pixel sharing is implemented, then resolution improves, but control complexity increases
Solution Approach 1:
The rendering driver performs preliminary processing of image data before it reaches the display pixels. It pre-calculates which pixels should be activated and at what intensities, taking into account the non-standard pixel layout with white and color pixels. This preliminary action simplifies the actual pixel control by converting complex high-resolution image data into simplified drive signals that account for the shared pixel architecture.
Solution Approach 2:
The rendering system creates virtual copies of pixel functions through software algorithms. When a white pixel needs to display color information, the system copies color data from adjacent color pixels and applies it to the white pixel through rendering calculations, effectively making the white pixel behave as if it were a color pixel without the physical complexity of color filters.
Data Source
AI summary
A display device is disclosed. In one aspect, a plurality of unit columns of pixels are arranged in a first direction. At least one of the unit columns includes a color column of pixels including a plurality of color pixels each configured to display a plurality of colors other than white. The unit columns also include a white column of pixels including a plurality of white pixels arranged in a second direction crossing the first direction, wherein the color column includes first to third color pixels configured to respectively display first to third colors different from each other.