Odd-Column Sub-Pixel Repeating Units for Display Driver Simplification
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Solution Overview
Problem
Current display panel technologies face challenges in achieving high resolution and efficient power usage due to increased complexity of pixel circuits, layout constraints, and display performance issues such as aperture ratio reduction and screen flickering, particularly in large-size displays.
Innovation Solution
The implementation of a display panel with sub-pixel repeating units arranged in odd-numbered columns, where each unit includes an extra sub-pixel for color mixing and polarization variation, allowing each unit to utilize its own sub-pixels as coloring resources and eliminating the need for data transfer between driving circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sub-pixel rendering technology is applied to increase resolution, then image quality is improved, but driving circuit complexity increases due to data transfer requirements between adjacent regions
Solution Approach 1:
The display panel is divided into multiple independent sub-pixel groups, where each group contains sub-pixels of different colors (e.g., red, green, blue, white). Each sub-pixel group can be driven independently without requiring data transfer between adjacent driving circuits, thus reducing circuit complexity while maintaining high resolution capability
Solution Approach 2:
Each sub-pixel group is designed to contain multiple color sub-pixels (RGBW) that can serve different functions. The same sub-pixel group structure can display different colors and adjust brightness levels, eliminating the need for separate dedicated circuits for each color channel and reducing overall system complexity
2Loss of energy
If aperture ratio is increased to improve backlight transmittance, then power consumption is reduced, but display resolution is lowered due to larger pixel size
Solution Approach 1:
Each pixel is segmented into multiple sub-pixels (red, green, blue, and white), allowing the white sub-pixel to have a larger area for high transmittance while the colored sub-pixels maintain smaller sizes for high resolution. This segmentation enables different sub-pixels to serve different functions with optimized dimensions
Solution Approach 2:
Different sub-pixels within the same pixel unit have different optical properties - the white sub-pixel is designed with larger area and higher transmittance for efficiency, while the colored sub-pixels are designed with smaller areas for resolution. This local quality differentiation allows simultaneous optimization of both power consumption and resolution
3Manufacturing precision
If pixel circuit complexity is increased to achieve high resolution, then display quality is improved, but layout area is occupied and manufacturing difficulty increases
Solution Approach 1:
The pixel circuit is segmented into multiple independent sub-pixel circuits, each controlling a specific color sub-pixel. This segmentation allows for simpler individual circuit designs that are easier to manufacture, while the combination of multiple sub-pixels achieves the desired high resolution display quality
Solution Approach 2:
Instead of using a single complex pixel circuit to control all color channels, the patent inverts the approach by using multiple simple sub-pixel circuits, each controlling a single color sub-pixel. This inversion simplifies the circuit design and manufacturing process while achieving the same resolution outcome
Data Source
AI summary
A display panel and a display driver are provided. The display panel includes a plurality of sub-pixel repeating units, which are arranged repeatedly to form a pixel array. Each row of the sub-pixel repeating unit includes an odd number of sub-pixels, where every two sub-pixels are regarded as one pixel unit, and another sub-pixel is added at the last column of the sub-pixel repeating unit. The odd-numbered sub-pixels are respectively written by N groups of pixel data. The amount of these sub-pixels is 2N+1, which is between two to two and a half times of the amount of the pixel data. Each odd-numbered column of the sub-pixel repeating unit includes the sub-pixels of two different colors, which are alternately arranged in each odd-numbered column.