Display Substrate with Alternating Solid and Mixed Color Columns
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Solution Overview
Problem
Conventional display devices face challenges in achieving a desirable display effect while minimizing manufacturing costs, particularly in reducing edge blur and improving pixel density, as existing methods are limited by process conditions and result in undesirable image boundary distortions.
Innovation Solution
A display substrate with sub-pixel units arranged in alternating solid and mixed color columns, where the sub-pixel units have different colors and specific geometric arrangements, allowing for precise control of illumination to form pixel units, thereby reducing edge aliasing and enhancing display clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixels per inch (PPI) is increased to reduce edge blur, then the display quality is improved, but the manufacturing cost increases and process complexity increases
Solution Approach 1:
The display substrate is divided into different pixel types (first pixels with 3 subpixels, second pixels with 2 subpixels, third pixels with 4 subpixels) arranged in different column patterns. This segmentation allows different regions to have different effective resolutions, improving edge display quality without uniformly increasing PPI across the entire display, thereby controlling manufacturing cost.
Solution Approach 2:
Different pixel configurations are applied to different spatial locations: first pixels (RGB) are used in non-edge regions, while second pixels (RGBW with one subpixel turned off) are used in edge regions. This local quality approach optimizes edge display performance specifically where needed, rather than increasing overall PPI, thus avoiding unnecessary manufacturing cost increases.
2Manufacturing precision
If the pixels per inch (PPI) is increased to improve display quality, then the edge display effect is improved, but the device complexity increases
Solution Approach 1:
The display is segmented into different pixel types arranged in alternating column patterns. First pixels (3 subpixels) alternate with second pixels (2 subpixels), creating a structured complexity that is manageable. This segmentation reduces edge aliasing by creating different effective resolutions in different regions without requiring uniform high PPI, thus controlling device complexity.
Solution Approach 2:
The patent introduces a fourth subpixel dimension (the white subpixel in RGBW configuration) that can be selectively activated or deactivated. This dimensional approach allows dynamic control of pixel density in different regions, improving edge display quality without permanently increasing the physical pixel count, thereby managing device complexity.
3Illumination intensity
If simultaneous illumination of multiple subpixel units is used to display edge images, then the brightness is improved, but edge aliasing and image boundary distortion occur
Solution Approach 1:
In edge region pixels (second pixels), one subpixel is extracted or turned off, leaving only 2 active subpixels instead of 3. This extraction reduces the illuminated area at edges, preventing light from adjacent pixels from causing aliasing, while maintaining sufficient brightness through the remaining subpixels and the white subpixel contribution.
Solution Approach 2:
Different illumination strategies are applied to different regions: full 3-subpixel illumination in non-edge regions for maximum brightness, and reduced 2-subpixel illumination in edge regions for sharp edges. This local quality approach optimizes both brightness and edge sharpness by adapting illumination characteristics to spatial location.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement enables sharper image edges and uniform color representation, reducing manufacturing costs by optimizing sub-pixel unit spacing and arrangement, leading to improved display quality and reduced edge distortions.
Implementation Method 1
an organic light emitting diode disposed on the substrate and having a fourth subpixel opened in the pixel defining layer different from the first, second, and third subpixels
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
The present application provides a display substrate, the display substrate including a plurality of sub-pixel units, the plurality of sub-pixel units arranged in a plurality of rows and columns, wherein the plurality of columns of the sub-pixel units include alternatingly disposed solid color sub-pixel unit columns and mixed color sub-pixel unit columns, the solid color sub-pixel unit columns including a plurality of sub-pixel units corresponding to the same color, and in the mixed color sub-pixel unit columns, adjacent two sub-pixel units correspond to different colors. In the same row of sub-pixel units, the sub-pixel units on both sides of the sub-pixel unit in the solid color sub-pixel unit column have different colors. The utility model also provides a display device. The display device does not appear jagged or blurred when displaying an image.