Shared Blue Sub-Pixel Drive Circuit for High-Resolution Displays
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Solution Overview
Problem
Traditional pixel drive circuits for high-resolution displays are difficult to manufacture due to the small size required for sub-pixels, necessitating a reduction in the number of pixel drive circuits to achieve higher pixel density.
Innovation Solution
A display structure where multiple sub-pixels share a single pixel drive circuit, with the blue sub-pixels connected to a common drive circuit based on average luminance data, reducing the overall number of pixel drive circuits while maintaining high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel resolution is increased to more than 500 ppi, then the display resolution is improved, but the pixel drive circuit cannot be manufactured due to the small size of the sub pixel
Solution Approach 1:
Multiple blue sub-pixels (third sub-pixels) within the same pixel group share a common pixel drive circuit. Specifically, N blue sub-pixels are controlled by one pixel drive circuit, while red and green sub-pixels maintain individual drive circuits. This merging approach reduces the total number of pixel drive circuits, making manufacturing feasible for high-resolution displays exceeding 500 ppi.
Solution Approach 2:
The common pixel drive circuit for blue sub-pixels serves multiple functions by controlling N blue sub-pixels simultaneously. This multi-functional design allows a single circuit to replace what would traditionally require N separate circuits, enabling high-resolution display manufacturing.
2Ease of manufacture
If the number of pixel drive circuits is reduced, then the manufacturing difficulty is decreased, but the image quality may be compromised
Solution Approach 1:
Different sub-pixel types receive different levels of drive circuit allocation based on human visual sensitivity. Blue sub-pixels, to which the human eye is less sensitive, share common drive circuits. Red and green sub-pixels, to which the eye is more sensitive, maintain individual drive circuits. This localized differentiation maintains image quality while reducing manufacturing complexity.
Solution Approach 2:
The invention changes the control parameter approach for blue sub-pixels by using average luminance data from multiple blue sub-pixels to drive them collectively. This parameter transformation allows N blue sub-pixels to be controlled by one circuit through calculated average values, preserving visual quality while reducing circuit count.
3Reliability
If each sub pixel is driven by a separate pixel drive circuit, then the image quality is maintained, but the number of pixel drive circuits increases making high resolution difficult to achieve
Solution Approach 1:
The invention merges the control of N blue sub-pixels into a single pixel drive circuit, reducing the total circuit count from N separate circuits to 1 common circuit for blue sub-pixels, while red and green sub-pixels maintain individual circuits. This merging directly addresses the device complexity issue.
Solution Approach 2:
The invention applies partial merging by fully separating red and green sub-pixel control while partially merging blue sub-pixel control. This selective approach maintains sufficient image quality for human perception while achieving the necessary reduction in circuit complexity for high-resolution displays.
Data Source
AI summary
A display is disclosed, including a pixel structure and pixel drive circuits. The pixel structure includes a plurality of pixel groups, each pixel group including two or more pixel units. The pixel unit includes a first sub pixel, a second sub pixel and a third sub pixel. Each of the first sub pixels is connected to a first pixel drive circuit, each of the second sub pixels is connected to a second pixel drive circuit, and all the third sub pixels in one pixel group are connected to a same third pixel drive circuit. A drive method for a display is also disclosed. In the above display and the drive method, a plurality of third sub pixels in one pixel group can be driven by a same third pixel drive circuit based on the same luminance data, which reduces the number of the pixel drive circuits and allows pixel drive of high resolution.