Optical Recess Touch Substrate for Display Devices
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Solution Overview
Problem
Conventional display devices with touch panels require separate optical sensors or touch electrodes to sense touch events, increasing manufacturing cost, complexity, and time.
Innovation Solution
A display device with a touch substrate featuring optical recesses that reflect different amounts of incident light, eliminating the need for separate optical sensors and touch electrodes, and utilizing a coordinate processor to determine touch coordinates based on reflected light information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate optical sensors and touch electrodes are used to sense touch events, then touch sensing capability is achieved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent merges the touch sensing function with the display panel by integrating optical recesses directly into the display structure. The display panel itself becomes the touch sensor, eliminating the need for separate touch electrodes and optical sensors. This is achieved by forming optical recesses at specific positions on the display panel that reflect light to indicate touch events, thereby combining display and touch sensing functions into a single integrated component.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both the display component and the touch sensing component. The optical recesses integrated into the display panel enable the panel to detect touch events while maintaining its primary display function, thus achieving multi-functionality and reducing the need for additional separate components.
2Reliability
If separate optical sensors and touch electrodes are used to sense touch events, then touch sensing capability is achieved, but manufacturing cost increases
Solution Approach 1:
The patent merges the touch sensing function with the display panel by integrating optical recesses directly into the display structure. The display panel itself becomes the touch sensor, eliminating the need for separate touch electrodes and optical sensors. This is achieved by forming optical recesses at specific positions on the display panel that reflect light to indicate touch events, thereby combining display and touch sensing functions into a single integrated component.
Solution Approach 2:
The patent extracts and eliminates the separate optical sensors and touch electrodes from the traditional touch panel structure. By removing these additional components and relying solely on the display panel with integrated optical recesses, the manufacturing process is simplified and costs are reduced while maintaining touch sensing capability.
3Reliability
If separate optical sensors and touch electrodes are used to sense touch events, then touch sensing capability is achieved, but manufacturing time increases
Solution Approach 1:
The patent merges the touch sensing function with the display panel by integrating optical recesses directly into the display structure. The display panel itself becomes the touch sensor, eliminating the need for separate touch electrodes and optical sensors. This is achieved by forming optical recesses at specific positions on the display panel that reflect light to indicate touch events, thereby combining display and touch sensing functions into a single integrated component.
Solution Approach 2:
The optical recesses are pre-formed as part of the display panel manufacturing process itself, rather than being added as separate components afterward. This preliminary integration of touch sensing structures into the display panel fabrication reduces the number of manufacturing steps and decreases overall production time.
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 solution reduces manufacturing costs, complexity, and time by integrating touch event sensing into the display device without the need for additional components, simplifying the manufacturing process and eliminating the requirement for masks typically used in touch electrode formation.
Implementation Method 1
a touch substrate disposed on the display panel, the touch substrate including optical recesses each configured to reflect respectively different amounts of incident light
Data Source
AI summary
An optical touch system includes: a coordinate processor; a display device; and an optical element. The optical element is configured to emit light towards the display device and provide information about reflected light corresponding to a portion of the emitted light to the coordinate processor. The display device includes: a display panel configured to display an image, a touch substrate disposed on the display panel, the touch substrate including optical recesses each configured to reflect respectively different amounts of incident light, and a protective layer disposed on the touch substrate. The coordinate processor is configured to determine a touch or near-touch coordinate based on the information received from the optical element.