Array Substrate Scanning Line Merging for VA Display Color Shift

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Solution Overview

Problem

Conventional vertical alignment (VA) mode liquid crystal displays face challenges with color shift and reduced pixel aperture rate due to the requirement of a charge share line, which occupies display area and affects image quality.

Innovation Solution

The design of an array substrate with pixel areas configured to share a scanning line and data line, where the source and gate of one TFT are on the same layer, and the gate, source, and drain of another TFT are on the same layer, eliminating the need for a charge share line and optimizing pixel aperture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a charge share line is configured in conventional LCD display, then color shift is avoided, but pixel aperture rate is reduced

Engineering Contradiction:

Improvecolor shift avoidanceVSAvoidpixel aperture rate

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent merges the charge share line function into the scanning line by configuring the scanning line to extend across both sub-pixels and serve as a common electrode. This integration eliminates the need for a separate charge share line while maintaining the charge sharing function between sub-pixels, thereby avoiding color shift without reducing pixel aperture rate.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The scanning line is designed to perform multiple functions: it serves as both the scanning signal transmission line and the common electrode for charge sharing between sub-pixels. This multi-functionality eliminates the need for dedicated charge share lines, resolving the contradiction between avoiding color shift and maintaining high pixel aperture rate.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If charge share line is used, then sub pixels are controlled properly, but display area is occupied

Engineering Contradiction:

Improvesub pixel controlVSAvoiddisplay area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent combines the charge share line with the scanning line structure, so that the scanning line serves dual purposes: transmitting scanning signals and providing common electrode function for charge sharing. This merger eliminates the need for separate charge share lines, ensuring proper sub-pixel control without occupying additional display area.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts the charge sharing function from the conventional separate charge share line and integrates it into the scanning line system. By taking out the redundant charge share line structure and incorporating its function into the existing scanning line, the display area is preserved while sub-pixel control reliability is maintained.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10551708B2Array substrates, manufacturing methods thereof and display panels

Publication Date: 2020.02.04 SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

AI summary

The present disclosure relates to an array substrate, a manufacturing method thereof, and a display panel. Each of the pixel areas correspondingly connects with a data line and a scanning line. In each of the pixel areas, a source of a first TFT and a gate of a second TFT are on the same layer. A gate of the first TFT, a source and a drain of the second TFT, and the scanning line are on the same layer. As such, the present disclosure may avoid the color shift of the vertical alignment (VA) display and may improve the pixel aperture rate.