Integrated Touch and Multi-View Optical System
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Solution Overview
Problem
Current display devices with touch sensing and multi-view image display functions face challenges in reducing thickness and weight while maintaining effective touch sensing and image quality.
Innovation Solution
An optical system comprising a first panel with first electrodes, a second panel with second electrodes, and an optical conversion layer, where an electric field generated by the electrodes creates a phase difference in the optical conversion layer for multi-view mode and forms a touch sensing capacitor for touch mode, using transparent conductive materials like ITO, IZO, graphene, or metal nanowires, and an organic insulating layer to improve touch sensing functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If separate touch sensing panel and optical system are used, then touch sensing function and multi-view image display function are independent, but device thickness and weight increase
Solution Approach 1:
The patent combines the touch sensing panel and the optical system into a single integrated structure. The touch sensing panel includes first and second electrodes that form a touch sensing capacitor, while the optical system uses the same electrodes to generate electric fields for creating phase differences in the optical conversion layer. This merging eliminates the need for separate components, thereby reducing device weight and thickness while maintaining both touch sensing and multi-view image display functions.
Solution Approach 2:
The electrodes in the touch sensing panel serve dual purposes: they function as sensing elements for touch detection by forming a capacitive structure, and simultaneously act as optical control elements by generating electric fields that manipulate the optical conversion layer to create phase differences for multi-view display. This multi-functionality allows a single component structure to perform multiple tasks, reducing overall device complexity and weight.
2Illumination intensity
If multiple layers are used for touch sensing and optical conversion, then both functions are achieved, but image luminance decreases due to more layers image passes through
Solution Approach 1:
The patent merges the touch sensing capacitor structure with the optical conversion layer structure. The first and second electrodes are positioned such that they form the touch sensing capacitor while simultaneously being adjacent to the optical conversion layer. This integration reduces the number of intermediate layers that light must pass through, minimizing light loss and maintaining high image luminance while preserving effective touch sensing capability.
3Length of moving object
If integrated touch sensing capacitor is formed with optical system, then device thickness is reduced, but touch sensing precision may be affected
Solution Approach 1:
The patent optimizes the local properties of the integrated structure by carefully positioning the first and second electrodes and configuring the optical conversion layer material properties in specific regions. The electrode arrangement and optical conversion layer characteristics are tailored to ensure that the capacitive coupling for touch sensing remains effective while the optical path for phase difference generation is maintained. This localized optimization preserves touch sensing precision despite the reduced device thickness.
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 enhances the thickness, weight, and touch sensing performance of display devices with integrated touch sensing and multi-view image display capabilities, reducing the number of layers the image passes through to enhance luminance and improve touch performance.
Implementation Method 1
an electric field generated in the optical conversion layer by the plurality of first electrodes and the plurality of second electrodes in a multi-view mode generates a phase difference in the optical conversion layer based on a location of the optical conversion material
Implementation Method 2
the plurality of first electrodes and the common electrode forms a touch sensing capacitor to sense a touch in a touch mode
Data Source
AI summary
An optical system includes a first panel that includes a plurality of first electrodes; a second panel facing the first panel and that includes a plurality of second electrodes; and an optical conversion layer positioned between the first panel and the second panel that includes an optical conversion material. An electric field generated in the optical conversion layer by the plurality of first electrodes and the plurality of second electrodes in a multi-view mode generates a phase difference in the optical conversion layer based on a location of the optical conversion material. The plurality of second electrodes includes a plurality of sub electrodes and a common electrode, and the plurality of first electrodes and the common electrode forms a touch sensing capacitor to sense a touch in a touch mode.