Touch Control Display Panel Black Matrix Layer Design
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Solution Overview
Problem
Conventional touch control display panels experience Moiré patterns and anti-blanking effects due to metal lines in touch electrodes, which affect display quality and can cause light reflection impacting thin film transistor performance.
Innovation Solution
A touch control display panel design featuring a counter substrate with a first and second black matrix layer and touch electrodes limited to the inter-subpixel region, where the black matrix layers substantially cover the orthographic projections of the touch electrodes, and an insulating layer and color filter blocks are integrated to improve display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If metal lines are used in touch electrodes, then touch control function is achieved, but Moiré patterns and light reflection occur affecting display quality
Solution Approach 1:
The touch electrode is divided into multiple segments (first touch electrode layer and second touch electrode layer) arranged in different orientations. This segmentation breaks the continuous metal line structure into discrete segments, reducing the formation of Moiré patterns while maintaining touch sensitivity and control functionality.
Solution Approach 2:
The touch electrode structure transitions from a single-plane metal line to a multi-layer three-dimensional structure. The first and second touch electrode layers are positioned at different heights and orientations, creating a spatial arrangement that reduces light reflection and Moiré effects while preserving touch control operation.
2Object-affected harmful factors
If black matrix layers are added to cover touch electrodes, then Moiré patterns and light reflection are reduced, but device structure becomes more complex
Solution Approach 1:
The black matrix layers serve multiple functions simultaneously: they cover the touch electrodes to reduce Moiré patterns and light reflection, provide structural support, and define the boundaries between subpixel regions. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The black matrix layers are integrated with the touch electrode structure and other display components. The first and second black matrix layers are combined with the multi-layer touch electrode system to form a unified structure that achieves both touch control and optical optimization without requiring entirely separate systems.
3Object-affected harmful factors
If touch electrodes are limited to inter-subpixel region, then display quality is improved, but touch electrode area is reduced
Solution Approach 1:
The touch electrode structure is selectively positioned in the inter-subpixel region where it does not interfere with the optical performance of the subpixel regions. This local placement optimizes display quality in the critical subpixel areas while maintaining sufficient touch electrode area in the inter-subpixel regions for effective touch control.
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 design minimizes Moiré patterns and light reflection, enhancing display quality by ensuring the black matrix layers cover the touch electrodes effectively, thereby improving the performance and properties of the thin film transistor.
Implementation Method 1
the first black matrix layer is made of an insulating light absorbing material
Data Source
AI summary
A touch control display panel having a subpixel region and an inter-subpixel region is provided. The touch control display panel includes an array substrate and a counter substrate facing the array substrate. The counter substrate includes a base substrate; a first black matrix layer on the base substrate; a plurality of touch electrodes on the base substrate; and a second black matrix layer on a side of the plurality of touch electrodes away from the first black matrix layer. The first black matrix layer, the second black matrix layer, and the plurality of touch electrodes are limited in the inter-subpixel region. Orthographic projections of the first black matrix layer and the second black matrix layer on the base substrate substantially cover an entirety of an orthographic projection of the plurality of touch electrodes on the base substrate.