Touch Sensing Optical System with Organic Dielectric Layer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with both 3D image display and touch sensing functions face increased thickness, weight, processing steps, and manufacturing costs due to the need for separate optical systems and sensors, which can reduce image brightness and product competitiveness.
Innovation Solution
An optical system that integrates a dielectric constant of 2.5 to 3.5 organic insulating layer functioning as a touch sensing capacitor, with a liquid crystal optical conversion layer, and drivers for voltage application, reduces the number of processing steps and costs while maintaining image luminance by combining 3D image and touch sensing functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate optical system and sensor are attached to display device, then touch sensing function and 3D image display function are achieved, but thickness and weight of display device are increased
Solution Approach 1:
The patent combines the optical system for 3D/multi-viewing image display and the touch sensing sensor into a single integrated structure. The optical conversion layer serves dual purposes: converting light for 3D/multi-viewing display and acting as a dielectric layer for the touch sensing capacitor. This merging eliminates the need for separate attached components, thereby reducing the overall thickness and weight of the display device while maintaining both touch sensing and 3D image display functions.
Solution Approach 2:
The optical conversion layer is designed to perform multiple functions simultaneously. It serves as both the optical conversion medium for 3D/multi-viewing image display and as the dielectric layer for the touch sensing capacitor. This multi-functionality allows a single component to fulfill multiple roles, reducing the number of separate components needed and thereby decreasing the device's thickness and weight.
2Adaptability or versatility
If separate optical system and sensor are attached to display device, then touch sensing function and 3D image display function are achieved, but brightness of displayed image is reduced
Solution Approach 1:
By merging the optical system and touch sensor into a single integrated structure, the light path is optimized with fewer interfaces and less light loss. The integrated design allows for better light management, ensuring that the brightness of the displayed image is maintained or even improved compared to separate attached components that would introduce additional light loss at each interface.
3Adaptability or versatility
If separate optical system and sensor are attached to display device, then touch sensing function and 3D image display function are achieved, but number of processing steps and manufacturing cost are increased
Solution Approach 1:
The integration of the optical system and touch sensor into a single structure significantly reduces the number of manufacturing steps. Instead of separately manufacturing and then attaching two distinct components, the patent describes a unified fabrication process where the optical conversion layer and touch sensing layers are formed together. This reduces the number of alignment steps, bonding operations, and quality checks required, thereby simplifying manufacturing and reducing costs.
Solution Approach 2:
The multi-functional design allows for a single set of manufacturing processes to produce components that serve multiple purposes. The same layers that form the optical conversion system also serve as the touch sensing structure, eliminating the need for separate manufacturing lines and assembly processes for distinct components, thus reducing overall manufacturing complexity and cost.
4Weight of stationary object
If integrated optical system with touch sensing is used, then thickness and weight are reduced, but manufacturing complexity may increase
Solution Approach 1:
While merging components reduces thickness and weight, the patent addresses manufacturing complexity by designing the integration process to follow standard display manufacturing workflows. The optical conversion layer and touch sensing layers are formed using conventional deposition and patterning techniques, minimizing the introduction of complex new manufacturing steps while achieving the benefits of integration.
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 reduces the thickness, weight, and processing time of the display device while maintaining image luminance, enhancing product competitiveness by integrating touch sensing and 3D/multi-viewing image display functions without increasing manufacturing complexity or costs.
Implementation Method 1
a sensing capacitor and detects a change in capacitance of the sensing capacitor which is generated when a conductor, such as a finger, approaches the sensor
Implementation Method 2
A dielectric constant of 2.5 to 3.5 organic insulating layer functioning as a touch sensing capacitor
Implementation Method 3
an optical system, such as a lenticular lens, a parallax barrier, or the like, is disposed on a display device and displays a 3D image without using glasses
Implementation Method 4
a liquid crystal optical conversion layer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An optical system includes: a first panel including a plurality of first electrodes extending in a first direction; a second panel facing the first panel and including a plurality of second electrodes extending in a second direction crossing the first direction; an optical conversion layer between the first panel and the second panel; and a first insulating layer between the first electrodes and the second electrodes, the first insulating layer including an organic material, wherein, in a touch mode, one or more of the first electrodes and one or more of the second electrodes crossing each other form a touch sensing capacitor, and wherein, in a multi-view mode, the first electrodes and the second electrodes apply an electric field to the optical conversion layer, the electric field depending on a voltage difference between the first electrode and the second electrode, to generate different phase differences.