Dual-Sided Touch Display with Optical Sensors
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Solution Overview
Problem
Conventional touch display panels are limited to single-sided input functions, restricting their applications in electronic devices.
Innovation Solution
A touch display device with dual-sided display and dual-sided touch input functions is achieved by using a first and second substrate with display devices and first and second optical touch sensor devices disposed on the substrates to enable touch input on both sides, utilizing optical touch sensor technologies for sensing inputs on each surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single-sided touch display panel is used, then the device structure is simple, but the input functionality is limited to one side only
Solution Approach 1:
The patent extends the touch display functionality from a single surface to dual surfaces by adding a second substrate with display devices and touch sensor devices on the opposite side of the first substrate. This dimensional expansion from 1-sided to 2-sided operation resolves the contradiction by providing versatile input functionality while maintaining a relatively compact structure through the use of transparent substrates and integrated sensor layers.
Solution Approach 2:
The patent implements multi-functionality by enabling both display and touch input operations on two opposite surfaces of the device. The first and second substrates each provide display surfaces and touch input surfaces, allowing the device to function as a touch display panel on both sides, thereby significantly enhancing adaptability and versatility.
2Adaptability or versatility
If dual-sided touch sensor devices are added to enable touch input on both surfaces, then touch input versatility is improved, but device complexity increases
Solution Approach 1:
The patent merges the touch sensor functionality into the display panel structure itself by integrating touch sensor devices with the display devices on both the first and second substrates. This combination approach enables dual-sided touch input capability while avoiding the need for separate, bulky sensor assemblies, thus limiting the increase in device complexity.
Solution Approach 2:
The patent employs optical touch sensor devices that utilize optical fields rather than mechanical contact sensors. This substitution allows for transparent sensor layers that do not interfere with the display function and enable touch detection through light interaction, reducing structural complexity compared to traditional mechanical or capacitive sensor systems.
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
The solution allows for dual-sided display and input functionality, enhancing the usability and versatility of touch display panels in electronic devices by enabling touch inputs on both sides of the panel.
Implementation Method 1
first optical touch sensor devices...for implementing touch input function on the first display surface; second optical touch sensor devices...for implementing touch input function on the second display surface
Data Source
AI summary
A touch display device includes a first substrate, a second substrate, a plurality of sub-pixel regions, a plurality of display devices, a plurality of first optical touch sensor device and second optical touch sensor devices. The first substrate and the second substrate are disposed oppositely. The display devices are disposed in the sub-pixel regions, respectively, to provide images for a first display surface and a second display surface. The first optical touch sensor devices are disposed on the first substrate and at least corresponding to part of the sub-pixel regions for implementing touch input function on the first display surface. The second optical touch sensor devices are disposed on the first substrate and at least corresponding to part of the sub-pixel regions for implementing touch input function on the second display surface.