Sub-pixel arrangement for LCD aperture ratio and power
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges in reducing power consumption while maintaining image quality, as the number of sub-pixels per pixel is high, leading to increased power consumption and limited brightness.
Innovation Solution
The implementation of innovative pixel arrangement methods, where sub-pixels are arranged in specific configurations to reduce the number of sub-pixels per pixel, increasing the aperture ratio and brightness, and decreasing power consumption by using a combination of sub-pixels corresponding to different colors, including white, to enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of sub-pixels per pixel is increased to improve image quality, then the PPI increases and image quality improves, but the power consumption increases and aperture ratio decreases
Solution Approach 1:
The invention segments the traditional pixel structure by introducing a pixel group comprising multiple pixels (first pixel, second pixel, third pixel, fourth pixel) with different sub-pixel configurations. This segmentation allows different regions to have different sub-pixel densities, optimizing the balance between image quality and power consumption across the display area.
Solution Approach 2:
The invention applies local quality by giving different pixels within the pixel group different sub-pixel compositions. Specifically, the first and second pixels have different sub-pixels than the third and fourth pixels, allowing certain regions to have higher sub-pixel density for better image quality while other regions use fewer sub-pixels to reduce power consumption.
2Measurement precision
If the number of sub-pixels per pixel is increased to improve image quality, then the PPI increases and image quality improves, but the aperture ratio decreases
Solution Approach 1:
The display is segmented into pixel groups with varying sub-pixel densities. By distributing sub-pixels non-uniformly across the pixel group, the invention maintains high PPI in critical areas while preserving larger aperture ratios in other areas, thus resolving the contradiction between image quality and aperture ratio.
Solution Approach 2:
Different pixels within the pixel group are assigned different sub-pixel configurations. This local differentiation allows the display to achieve high image quality where needed while maintaining larger aperture ratios in regions where fewer sub-pixels are present, optimizing the trade-off between these two parameters.
3Use of energy by moving object
If the number of sub-pixels per pixel is decreased to reduce power consumption, then the power consumption decreases and aperture ratio increases, but the image quality deteriorates
Solution Approach 1:
The invention segments the display into pixel groups where not all pixels have the same sub-pixel count. This allows the system to use fewer sub-pixels (reducing power consumption) in certain pixels while compensating with the overall pixel group structure to maintain acceptable image quality.
Solution Approach 2:
By applying different sub-pixel configurations to different pixels within the pixel group, the invention creates local variations in image quality. Areas with more sub-pixels provide better image quality, while areas with fewer sub-pixels reduce power consumption, achieving an overall balance.
4Use of energy by moving object
If the number of sub-pixels per pixel is decreased to reduce power consumption, then the power consumption decreases and aperture ratio increases, but the PPI decreases
Solution Approach 1:
The pixel group structure segments the display into units with varying sub-pixel densities. This segmentation allows the overall PPI to be maintained through the combination of multiple pixels while individual pixels can use fewer sub-pixels to reduce power consumption.
Solution Approach 2:
The invention applies local quality by having different pixels with different sub-pixel counts within the same pixel group. This creates local variations where some pixels contribute more to PPI while others focus on power efficiency, achieving an overall balance between these conflicting parameters.
Data Source
AI summary
A display device includes a plurality of sub-pixel groups. Each of sub-pixel groups includes a first sub-pixel located at a first column; a second sub-pixel located at a second column adjacent to the first column; a third sub-pixel located at a third column adjacent to the second column; a fourth sub-pixel located at a fourth column adjacent to the third column; and a fifth sub-pixel located at the third column and the fourth column; wherein height of first sub-pixel equals height of second sub-pixel, height of first sub-pixel is greater than heights of third sub-pixel, fourth sub-pixel and fifth sub-pixel, and height of the first sub-pixel is different from or equal to sum of heights of fifth sub-pixel and third sub-pixel or sum of heights of fifth sub-pixel and fourth sub-pixel; wherein height of fifth sub-pixel is different from or equal to heights of third sub-pixel and fourth sub-pixel.