Touch Display Device With Integrated Sensing Elements
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Solution Overview
Problem
Touch display devices with integrated touch functions tend to increase in thickness due to the need for a cover lens, which complicates the integration of micro LED technology.
Innovation Solution
The integration of sensing elements between light-emitting elements and a substrate in a touch display device, allowing the sensing elements to overlap orthographically with the light-emitting elements, thereby maintaining device thickness without increasing it, and enabling adjustable sensing resolution by spacing adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cover lens is added to enable touch function, then touch capability is improved, but device thickness increases
Solution Approach 1:
The patent combines the touch sensor and light-emitting element into a single integrated structure where the touch sensor is positioned directly on the substrate and the light-emitting element is positioned directly on the touch sensor, eliminating the need for a separate cover lens and reducing overall device thickness
Solution Approach 2:
The patent transitions from a planar layered structure to a three-dimensional stacked structure where multiple functional layers (substrate, touch sensor, light-emitting element) are vertically integrated, allowing touch functionality to be achieved without increasing horizontal footprint or requiring additional cover layers
2Length of moving object
If sensing elements are integrated with light-emitting elements, then device thickness is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the device into distinct functional modules (substrate layer, touch sensor layer, light-emitting element layer) that can be manufactured separately and then stacked together, simplifying the manufacturing process while achieving thin integration
Solution Approach 2:
The substrate serves multiple functions as both the structural base for the device and the sensing layer for touch detection, while the light-emitting element serves as both the display component and a potential indicator for touch status, reducing the need for separate dedicated components
Data Source
AI summary
A touch display device, including a substrate and multiple light-emitting units bonded to the substrate, is provided. Each of the multiple light-emitting units includes at least one light-emitting element. A first light-emitting unit of the multiple light-emitting units includes at least one sensing element. In the first light-emitting unit, the at least one sensing element is located between the at least one light-emitting element and the substrate. The orthographic projection of the at least one sensing element on the substrate overlaps the orthographic projection of the at least one light-emitting element on the substrate.