Tiled Display Layout With Black Matrix for Accurate Touch Sensing
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Solution Overview
Problem
Existing electronic devices fail to meet demands in integrating light-emitting and sensing functions effectively, particularly in preventing light interference and enhancing sensing accuracy.
Innovation Solution
The integration of a black matrix with light-shielding properties on the substrate, which does not overlap light-emitting and sensing elements, along with a cover layer and adhesion layer, to minimize light interference and improve sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix is used to shield light for driving elements, then light-shielding effectiveness is improved, but the complexity of the device structure increases
Solution Approach 1:
The black matrix is segmented into multiple regions with different functions: a first region with openings for light emission, a second region for sensing elements, and a third region (light-shielding portion) for shielding driving elements. This segmentation allows each region to be optimized for its specific function, achieving effective light-shielding for driving elements while maintaining device simplicity through integrated design.
2Measurement precision
If sensing elements are disposed adjacent to light-emitting elements, then touch sensitivity is improved, but the area occupied by the device increases
Solution Approach 1:
The sensing elements and light-emitting elements are merged into a closely integrated arrangement where sensing elements are disposed adjacent to light-emitting elements. The black matrix integrates multiple functions including light emission, sensing, and shielding in a unified structure, achieving high touch sensitivity without proportionally increasing the overall device area.
3Adaptability or versatility
If multiple functional elements are integrated in a compact arrangement, then device functionality is improved, but manufacturing precision requirements increase
Solution Approach 1:
Different regions of the black matrix are assigned different local qualities and functions: the first region has openings for light emission, the second region is optimized for sensing element placement, and the third region provides light-shielding. This local differentiation allows each area to be manufactured and optimized independently, reducing overall manufacturing precision requirements while maintaining high device functionality.
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
Enhances the accuracy of sensing elements by reducing light reflection from the substrate routing and allowing precise detection of user interactions, enabling interactive functions similar to touch displays.
Implementation Method 1
The sensing element includes a first thin-film transistor (TFT)... receiving the first signal by the first sensing element... receiving the second signal by the second sensing element
Data Source
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AI summary
An electronic device is provided. The electronic device includes a substrate and the electronic device also includes a light-emitting element, a sensing element and a black matrix disposed on the substrate. The sensing element is disposed adjacent to the light-emitting element. The black matrix has a plurality of openings and a light-shielding portion. The electronic device further includes a driving element disposed adjacent to and electrically connected to the light-emitting element. The sensing element includes a first thin-film transistor, and the driving element includes a second thin-film transistor. In a normal direction of the substrate, one of the openings is disposed corresponding to the sensing element, and the light-shielding portion is disposed corresponding to the driving element.