Sub-pixel Arrangement for LCD Aperture Ratio and Power Optimization
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Solution Overview
Problem
Liquid crystal displays (LCDs) face challenges in maintaining image quality while reducing power consumption, as increasing pixels per inch (PPI) beyond a threshold leads to power consumption increases and decreased recognition of individual pixels, making it difficult to recognize distances between pixels.
Innovation Solution
The solution involves rearranging sub-pixels into groups where the rows of certain sub-pixels overlap, reducing the number of sub-pixels per pixel, and optimizing the aperture ratio, while incorporating sub-pixels corresponding to different colors, such as adding a white sub-pixel to enhance brightness and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PPI of the LCD is increased to improve image quality, then the image quality is improved, but the power consumption increases and the aperture ratio decreases
Solution Approach 1:
The invention divides the traditional RGB pixel structure into sub-pixel groups containing five sub-pixels (R1, G1, B1, R2, G2) arranged in a segmented pattern. This segmentation allows selective activation of sub-pixels and reduces the total number of sub-pixels needed per pixel, thereby increasing aperture ratio and reducing power consumption while maintaining image quality through coordinated sub-pixel control
Solution Approach 2:
The invention changes the structural parameters of the pixel array by reducing the number of sub-pixels per pixel from the traditional three to a optimized five-sub-pixel group configuration. This parameter change increases the aperture ratio and reduces power consumption while maintaining or improving image quality through the specific arrangement and selective driving of sub-pixels
2Measurement precision
If the PPI of the LCD is increased to improve image quality, then the image quality is improved, but the aperture ratio decreases
Solution Approach 1:
The pixel structure is segmented into five sub-pixels (R1, G1, B1, R2, G2) arranged in a specific pattern where R1 and G1 are in one row and B1, R2, G2 are in another row. This segmentation optimizes the use of light and increases the effective aperture ratio by reducing redundant sub-pixel structures while maintaining color accuracy and image quality
Solution Approach 2:
The invention merges the functionality of multiple traditional sub-pixels into a five-sub-pixel group configuration. By combining red, green, and blue sub-pixels in a specific arrangement with overlapping rows, the design achieves better light utilization and increased aperture ratio while maintaining the necessary color gamut and image quality
3Use of energy by moving object
If the number of sub-pixels is decreased to reduce power consumption, then the power consumption is reduced, but the image quality may deteriorate
Solution Approach 1:
The invention applies local quality optimization by assigning different roles to different sub-pixels within the five-sub-pixel group. The sub-pixels are strategically positioned and configured to provide enhanced color accuracy in critical areas while reducing the total number of sub-pixels, thereby maintaining image quality while reducing power consumption
Solution Approach 2:
The driving module implements feedback control by selectively activating specific sub-pixels (R1, G1, B1, R2, G2) based on the image content and luminance requirements. This feedback mechanism ensures that the minimum necessary number of sub-pixels are activated to maintain image quality, thereby reducing power consumption without sacrificing visual performance
Data Source
AI summary
A display device with a plurality of sub-pixel groups is disclosed. Each of the sub-pixel groups comprises 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 fourth column; wherein the row of the second sub-pixel overlaps the row of the first sub-pixel; wherein the row of the third sub-pixel overlaps the row of the first sub-pixel; wherein the row of at least one of the fourth sub-pixel and the fifth sub-pixel overlaps the row of the first sub-pixel; wherein a sum of the heights of the fourth sub-pixel and the fifth sub-pixel is smaller than or equal to the height of the first sub-pixel.