Projector Sub-Pixel Segmentation for Resolution and Brightness
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Solution Overview
Problem
Existing projector technologies require a large color liquid crystal panel with a high number of pixels, leading to increased size and reduced aperture ratio, and struggle with maintaining response speed, especially when using liquid crystal panels with color filters.
Innovation Solution
A display device with sub-pixels of green, white, and magenta colors, illuminated by yellow and cyan light sources, allowing for efficient expression of colors and improved resolution and brightness, while maintaining a lower total sub-pixel count, and utilizing a liquid crystal display device to modulate light for image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color liquid crystal panel with color filter is used to display color images, then color display capability is improved, but the number of pixels must be more than three times the required resolution, causing the panel size to increase and aperture ratio to decrease
Solution Approach 1:
The invention segments the color display function by separating the green color display into two independent green sub-pixels (first green sub-pixel and second green sub-pixel), while using a magenta sub-pixel for red and blue display. This segmentation allows the panel to achieve full color display capability with fewer total sub-pixels, thereby reducing panel size while maintaining color reproduction quality.
Solution Approach 2:
The invention applies local quality by giving different functions to different sub-pixels: the first green sub-pixel displays green using yellow illumination light, the second green sub-pixel displays green using cyan illumination light, and the magenta sub-pixel displays both red and blue. This localized functional differentiation optimizes the overall system performance while reducing the total number of sub-pixels required.
2Illumination intensity
If a color liquid crystal panel with color filter is used, then color display is achieved, but the sub-pixel number increases to more than three times the required resolution, lowering the aperture ratio
Solution Approach 1:
The invention segments the green color display function into two separate green sub-pixels that operate with different illumination lights (yellow and cyan), allowing the magenta sub-pixel to handle red and blue display. This segmentation strategy reduces the total sub-pixel count from more than three times the resolution to approximately twice the resolution, thereby improving the aperture ratio while maintaining color display capability.
Solution Approach 2:
The magenta sub-pixel serves multiple functions by displaying both red and blue colors, making it a multi-functional element. Combined with the two green sub-pixels that handle green display through different illumination paths, this universal approach reduces the overall number of sub-pixels needed while maintaining full color display capability.
3Illumination intensity
If a liquid crystal panel with color filter is used in a projector, then color image projection is achieved, but the response speed becomes difficult to maintain at proper levels
Solution Approach 1:
The invention employs periodic action by using field-sequential color display with three illumination lights (yellow, cyan, and a third light) that are alternately switched in time. The liquid crystal panel displays different color information in different time periods corresponding to each illumination light, achieving color image projection while maintaining fast response speed since each sub-pixel only needs to switch between two states rather than handling full color transitions simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures high apparent resolution and brightness with a reduced number of sub-pixels, improving display quality and maintaining color balance, while also enhancing the response speed of the display device.
Implementation Method 1
a light source capable of illuminating the light modulation element with yellow illumination light and cyan illumination light
Implementation Method 2
a light modulation element having at least one first sub-pixel with green color, at least one second sub-pixel including green color, and at least one third sub-pixel with magenta color
Data Source
AI summary
Since green is expressed by the first sub-pixels and the second sub-pixels, and at the same time, red is expressed by the third sub-pixels using the yellow illumination light, and green is expressed by the first sub-pixels and the second sub-pixels, and at the same time, blue is expressed by the third sub-pixels using the cyan illumination light, the display device can assure the apparent resolution and the brightness using the first and second sub-pixels with greenish color. It should be noted that red and blue can be expressed by the third sub-pixels with magenta color.