Switchable Touch Display Device with Integrated Polarization Control
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Solution Overview
Problem
The existing switchable type touch display devices are thick and costly due to the need for separate touch and polarization control panels, which also lead to increased power consumption and limitations in applying them to mobile devices and partial 2D/3D displays.
Innovation Solution
A switchable type touch display device with a touch polarization control panel that integrates electrodes on a polarization control panel, allowing for the detection of touch and control of polarization states, reducing thickness and fabrication costs, and enabling efficient power use by forming electrodes for touch on a polarization control panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate touch panel and polarization control panel are used, then touch detection function and polarization control function are achieved, but device thickness increases and fabrication cost increases
Solution Approach 1:
The patent combines the touch detection panel and polarization control panel into a single integrated panel structure. The touch detection electrodes and polarization control electrodes are formed on the same substrate, allowing both touch detection and polarization control functions to be achieved within one panel, thereby reducing device thickness while maintaining functionality.
Solution Approach 2:
The integrated panel serves multiple functions simultaneously: it acts as both a touch detection panel and a polarization control panel. By designing the panel with both touch detection electrodes and polarization control electrodes, a single component performs what previously required two separate components, reducing overall device thickness.
2Adaptability or versatility
If separate touch panel and polarization control panel are used, then touch detection function and polarization control function are achieved, but fabrication cost increases
Solution Approach 1:
The patent merges the fabrication processes of the touch panel and polarization control panel into a single integrated manufacturing process. By forming both touch detection electrodes and polarization control electrodes on the same substrate using coordinated patterning steps, the patent reduces the number of separate fabrication processes required, thereby lowering fabrication costs.
Solution Approach 2:
The patent divides the electrode formation process into distinct patterning steps: first forming touch detection electrodes through a first photolithography process, then forming polarization control electrodes through a second photolithography process. This segmented approach allows for precise control of each electrode type while maintaining an integrated structure, optimizing both manufacturing complexity and cost.
3Adaptability or versatility
If separate touch panel and polarization control panel are used, then complete functionality is achieved, but power consumption increases
Solution Approach 1:
The patent combines the touch panel and polarization control panel into a single integrated structure, which reduces the total number of components and interconnections required. This integration reduces power consumption by eliminating redundant driving circuits and reducing the overall capacitance that needs to be charged and discharged during operation.
4Adaptability or versatility
If separate touch panel and polarization control panel are used, then full functionality is achieved, but device complexity increases
Solution Approach 1:
The patent integrates the touch detection panel and polarization control panel into a single panel structure, reducing device complexity by eliminating the need for separate panels and their associated mounting structures. The integrated design simplifies the overall device architecture while maintaining the ability to switch between 2D and 3D display modes through coordinated control of the integrated electrodes.
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 overall thickness and fabrication costs of the display device, enhances power efficiency, and allows for effective partial 2D/3D image display by integrating touch and polarization control functions within a single panel.
Implementation Method 1
a liquid crystal lens where a liquid crystal layer functions as a lens by using an optical anisotropic property of a liquid crystal molecule
Implementation Method 2
The liquid crystal molecule 56a has a birefringence property such that the liquid crystal molecule 56a has an ordinary refractive index no and an extraordinary refractive index no according to a propagation direction of light
Implementation Method 3
the lens panel refracts or straightly transmits a light passing through the touch polarization control panel according to a polarization state of the light
Implementation Method 4
The touch panel 60 detects a touch position from a change in capacitance between the transmission and reception electrodes 64 and 66 generated according to a touch
Data Source
AI summary
A switchable type touch display device includes: a display panel displaying an image; a touch polarization control panel over the display panel, wherein the touch polarization control panel includes: first and second touch polarization control substrates; a first electrode on an inner surface of the first touch polarization control substrate; a second electrode on an inner surface of the second touch polarization control substrate; a third electrode on an outer surface of the second touch polarization control substrate; and a polarization control liquid crystal layer between the first and second touch polarization control substrates; and a lens panel over the touch polarization control panel.