Display Substrate Pixel Layout for Edge Color Uniformity

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Solution Overview

Problem

In display products with narrow frames, such as spliced screens, the uneven edges of the frame can shield pixels to different extents, leading to rainbow-like patterns due to varying effects on RGB sub-pixels, resulting in color discrepancies at the screen edges.

Innovation Solution

A display substrate with a middle display region and two peripheral display regions, where sub-pixels are arranged along specific directions to ensure uniform aperture exposure, with unique wiring configurations for thin film transistors and data lines, preventing uneven shielding by the frame.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If sub-pixels are arranged in a conventional uniform pattern across the entire display, then manufacturing is simplified, but frame edges shield pixels unevenly causing rainbow-like patterns and color discrepancies

Engineering Contradiction:

Improvesub-pixel arrangement simplicityVSAvoidrainbow-like patterns at screen edge

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The display panel is divided into a first display region and a second display region. The first display region uses a conventional sub-pixel arrangement, while the second display region uses a different sub-pixel arrangement. This segmentation allows each region to be optimized for its specific function, preventing rainbow-like patterns at the screen edge while maintaining manufacturing simplicity in the majority of the display area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different sub-pixel arrangement patterns are applied to different regions of the display panel. Specifically, the second display region (peripheral region) uses a special arrangement where at least one pixel unit has a different sub-pixel arrangement compared to the first display region. This local quality adjustment ensures that pixels in the peripheral region are not adversely affected by frame shielding, eliminating color discrepancies at the screen edges.

Inventive Principle:

Principle #3Local quality

2Shape

If the display uses a narrow frame design, then the product appearance is improved, but pixels at the periphery are shielded by the frame causing color discrepancies

Engineering Contradiction:

Improvenarrow frame designVSAvoidcolor discrepancies at screen edge

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent applies a special sub-pixel arrangement pattern in the second display region (peripheral region) that is specifically designed to compensate for frame shielding effects. This local adjustment ensures that even with a narrow frame design, the peripheral pixels maintain correct color representation, eliminating rainbow-like patterns while preserving the aesthetic narrow frame appearance.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of trying to make the frame larger to avoid shielding pixels, the patent inverts the approach by adjusting the sub-pixel arrangement in the peripheral region to specifically counteract the shielding effect. This inversion allows the narrow frame design to be maintained while solving the color discrepancy problem through a相反的技术手段.

Inventive Principle:

Principle #13The other way round (Inversion)

3Object-affected harmful factors

If different sub-pixel arrangements are used in different regions, then rainbow-like patterns are prevented, but device complexity increases

Engineering Contradiction:

Improverainbow-like patterns preventionVSAvoidsub-pixel arrangement complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The display panel is segmented into two distinct regions with different sub-pixel arrangements. The first display region uses a conventional, simple arrangement that is easy to manufacture, while the second display region uses a special arrangement only where needed to prevent rainbow-like patterns. This segmentation minimizes the area requiring complex arrangements, thereby reducing overall device complexity while still achieving the desired effect.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The complex sub-pixel arrangement is applied locally only in the second display region (peripheral region) where it is needed to prevent rainbow-like patterns. The majority of the display area (first display region) maintains a simple, conventional arrangement. This localized application of complexity minimizes the impact on overall device complexity while effectively preventing the harmful optical effects at the screen edges.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20240038776A1Display substrate and display device

Publication Date: 2024.02.01 BEIJING BOE DISPLAY TECH CO LTD

AI summary

The present disclosure provides a display substrate and a display device. The display substrate includes a middle display region, and first and second peripheral display regions arranged at two opposite sides of the middle display region respectively. Each pixel unit includes at least two sub-pixels in different colors and having a rectangular shape including long and short sides. In the middle display region and at least one of the first and second peripheral display regions, the sub-pixels in each pixel unit are sequentially arranged along a short side extension direction, extension directions of the first and second peripheral display regions are perpendicular to the short side extension direction in the middle display region, and the short side extension direction in at least one of the first and second peripheral display regions is perpendicular to the short side extension direction in the middle display region.