Array Substrate Touch Lead Group Merging for Aperture Ratio

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Solution Overview

Problem

Existing array substrates for display technologies face challenges such as low pixel aperture ratio and high production costs due to the presence of multiple touch leads between sub-pixels, which affect the resolution and light transmittance of display apparatuses.

Innovation Solution

The array substrate design includes a touch lead group with a first and second lead provided side by side, where the first lead is connected to a touch electrode in one row and the second lead to an adjacent row, reducing the number of leads and increasing the space for sub-pixels, thereby improving the pixel aperture ratio and light transmittance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple touch leads are provided between sub-pixels, then touch functionality is achieved, but pixel aperture ratio decreases

Engineering Contradiction:

Improvetouch functionalityVSAvoidpixel aperture ratio

Core Design Contradiction:

ReliabilityVSArea of moving object

Solution Approach 1:

The patent combines multiple touch leads (first lead and second lead) into a single integrated structure positioned between adjacent pixel columns. This merging approach maintains the necessary touch functionality while reducing the total lead area occupying pixel space, thereby improving the pixel aperture ratio compared to providing separate leads for each touch row.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The touch lead group serves multiple functions simultaneously: it provides touch signal transmission for multiple touch rows through the first and second leads, while also acting as a structural element that defines pixel column boundaries. This multi-functionality reduces the need for additional dedicated structures, preserving pixel aperture area.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple touch leads are provided between sub-pixels, then touch functionality is achieved, but light transmittance decreases

Engineering Contradiction:

Improvetouch functionalityVSAvoidlight transmittance

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

By merging the first lead and second lead into a single touch lead group structure rather than providing separate leads, the total material volume and optical obstruction area are reduced. This allows more light to pass through the pixel region, improving light transmittance while maintaining touch functionality through the integrated lead structure.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If multiple touch leads are provided between sub-pixels, then touch functionality is achieved, but production cost increases

Engineering Contradiction:

Improvetouch functionalityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The integration of multiple leads into a single touch lead group simplifies the manufacturing process by reducing the number of separate patterning and deposition steps required. This merging approach reduces production complexity and cost compared to manufacturing multiple separate leads between each sub-pixel.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies different structural configurations to different regions: the touch lead group is positioned specifically between adjacent pixel columns rather than between every sub-pixel, optimizing the balance between touch functionality and manufacturing simplicity. This localized approach reduces overall production cost while maintaining necessary touch capabilities.

Inventive Principle:

Principle #3Local quality

4Area of moving object

If leads are positioned between adjacent pixel columns, then pixel aperture ratio increases, but lead connection complexity increases

Engineering Contradiction:

Improvepixel aperture ratioVSAvoidlead connection complexity

Core Design Contradiction:

Area of moving objectVSDevice complexity

Solution Approach 1:

The patent positions the touch lead group in a specific spatial arrangement between adjacent pixel columns, utilizing the columnar dimension rather than row-based positioning. This dimensional reorganization allows the first and second leads to serve multiple touch rows simultaneously, reducing connection complexity while maintaining high pixel aperture ratio.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20240393648A1Array substrate, testing method therefor, and display apparatus

Publication Date: 2024.11.28 HEFEI BOE OPTOELECTRONIC TECH CO LTD

AI summary

An array substrate, a testing method therefor and a display apparatus. The array substrate comprises multiple touch control electrodes forming multiple touch control rows and multiple touch control columns, and multiple pixel units forming multiple pixel rows and multiple pixel columns, the orthographic projection of the touch control electrodes on the array substrate at least partially overlapping the orthographic projection of the multiple pixel units on the array substrate, and the pixel units comprising multiple sub-pixels; a touch control lead group is arranged in the middle of at least one adjacent pixel column, the touch control lead group at least comprising a first lead and a second lead arranged in parallel, and the first lead is connected to one of the touch control electrodes in one touch control row, and the second lead is connected to another touch control electrode in the adjacent touch control row.