WRGB Display Panel Asymmetric Subpixel Circuit Design
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Solution Overview
Problem
Display devices face challenges in efficiently converting and displaying YCbCr image data into WRGB format, particularly in simplifying the driving circuit structure and improving aperture ratio.
Innovation Solution
A display device with a display panel comprising gate lines, data lines, and pixels arranged in a matrix form, where luminance data is applied to white subpixels, and colored subpixels include dual subpixels of equal size to white subpixels, connected by a single data line, with transistors connected to signal lines through white subpixels, allowing for effective conversion and display of YCbCr data as WRGB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If YCbCr image data is converted and displayed using traditional RGB subpixel structures, then color accuracy may be maintained, but the aperture ratio is reduced and driving circuit complexity increases
Solution Approach 1:
The pixel is segmented into two white subpixels and two colored subpixels (red and green), where the white subpixels are positioned at corners and the colored subpixels are positioned at edge centers. This segmentation allows for optimized light emission areas and simplified driving circuits while maintaining color accuracy through the WRGB arrangement.
Solution Approach 2:
The patent employs an asymmetric subpixel arrangement where white subpixels are located at corner positions and colored subpixels (red and green) are located at edge center positions. This asymmetric WRGB configuration optimizes the aperture ratio by effectively arranging the light-emitting areas while maintaining color accuracy, and allows for simplified driving circuit design compared to traditional symmetric RGB arrangements.
2Measurement precision
If separate data lines are provided for each subpixel, then individual control precision is improved, but the number of signal lines increases and aperture ratio decreases
Solution Approach 1:
The patent merges the control of two colored subpixels (red and green) into a single data line, reducing the total number of signal lines required. The asymmetric WRGB pixel structure allows for efficient signal distribution where fewer data lines can address multiple subpixels, thereby increasing the aperture ratio while maintaining sufficient control precision through the optimized pixel layout.
3Adaptability or versatility
If more subpixels of equal size are arranged in a pixel, then color representation is improved, but the aperture ratio and manufacturing simplicity are compromised
Solution Approach 1:
The patent applies local quality by assigning different functions to different subpixel positions within the pixel. White subpixels at corner positions provide bright light emission, while colored subpixels (red and green) at edge center positions provide color information. This localized functional assignment achieves effective color representation with a simplified WRGB structure that is easier to manufacture compared to more complex multi-subpixel arrangements.
Data Source
AI summary
In a display device and display panel, a display panel includes: a plurality of pixels arranged in a matrix, each including two white subpixels and a plurality of colored subpixels, and a data pad connecting two adjacent colored subpixels, among the plurality of colored subpixels, corresponding to a same color, in a first direction, wherein luminance data is applied to the white subpixel, wherein each of the plurality of colored subpixels includes a dual subpixel having a size of the two white subpixels arranged in a second direction, the dual subpixel including a plurality of transistors, wherein a first transistor in the dual subpixel is connected to a first signal line extending through a first of the two white subpixels, and wherein a second transistor in the dual subpixel, is connected to a second signal line extending through a second of the two white subpixels.