Black Matrix Light Shielding for Tiled Electronic Device Sensing
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Solution Overview
Problem
Current electronic devices with light-emitting diodes (LEDs) and sensing functions face challenges in meeting demands for efficient light management and accurate sensing, particularly in interactive display applications where light shielding and sensing accuracy are crucial.
Innovation Solution
An electronic device design incorporating a substrate with a light-emitting element, a sensing element, and a black matrix with openings and a light-shielding portion, where the sensing element includes a thin-film transistor and the driving element also includes a thin-film transistor, optimized for improved light management and sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix with light-shielding portion is added to shield light from the driving element, then light shielding performance is improved, but device complexity increases
Solution Approach 1:
The black matrix is merged with the substrate structure, integrating the light-shielding function into the existing substrate rather than adding a separate component. This reduces device complexity while maintaining effective light shielding for the driving element.
Solution Approach 2:
The black matrix acts as an intermediary layer between the driving element and external light sources, selectively blocking harmful light while allowing necessary light to reach the sensing element through dedicated openings.
2Measurement precision
If the sensing element is disposed adjacent to the light-emitting element without light shielding, then sensing accuracy deteriorates due to stray light, but device complexity increases with light shielding structures
Solution Approach 1:
The black matrix is applied selectively only in regions where light shielding is necessary (around the driving element), while leaving openings in regions where light must reach the sensing element. This localized approach improves sensing accuracy without unnecessarily increasing device complexity.
3Device complexity
If multiple functional elements (light-emitting, sensing, driving) are integrated on the same substrate, then device complexity is reduced, but light management becomes more difficult
Solution Approach 1:
Different regions of the substrate are assigned different optical properties: the black matrix regions provide light shielding for the driving element, while opening regions allow light to reach the sensing element. This localized optical management enables effective light control in the integrated structure.
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 light shielding and sensing accuracy, enabling effective interactive functions and display performance by ensuring the sensing element can accurately detect changes in light intensity and position, even with user interaction.
Implementation Method 1
The sensing element is disposed adjacent to the light-emitting element... receiving the first signal by the first sensing element... receiving the second signal by the second sensing element
Data Source
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.