Touch Display Anti-Peeping via Patterned Electrode Layer
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Solution Overview
Problem
Current touch display technologies face challenges in achieving lightweight, thin designs while maintaining desirable display quality and privacy, particularly in public settings where anti-peeping functionality is needed without compromising screen brightness or viewing experience.
Innovation Solution
A touch display apparatus incorporating a patterned viewing angle control transparent electrode layer between substrates, which controls liquid crystal rotation by adjusting voltage, reducing the viewing angle to implement an anti-peeping mode while maintaining desirable liquid crystal efficiency and integrating touch electrode layers for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an adhesion-type anti-peeping patch is adhered on the screen surface, then anti-peeping effect is achieved, but display brightness is greatly reduced and viewing experience is reduced
Solution Approach 1:
The patent extracts the anti-peeping function from external patches and integrates it into the display structure itself by forming control electrode members directly on the first substrate. This eliminates the need for external anti-peeping patches that block light, while achieving the same privacy protection function through voltage-controlled liquid crystal orientation within the display layers.
Solution Approach 2:
The patent merges the anti-peeping function with the display structure by integrating control electrode members into the substrate architecture. The control electrode members are formed alongside pixel electrodes and common electrodes, combining the display and anti-peeping functions into a single integrated system rather than using separate external patches.
2Weight of stationary object
If in-cell technology is used to integrate touch element in the panel, then lightweight and thin design is achieved, but manufacturing difficulty increases
Solution Approach 1:
The patent segments the control electrode members into distinct regions (first control electrode members, second control electrode members, third control electrode members) corresponding to different functional areas. This segmentation allows for simplified manufacturing by forming control electrodes in separate stages alongside pixel electrodes, reducing the complexity of integrating multiple functions into a single process.
3Object-affected harmful factors
If viewing angle is reduced to prevent peeping, then privacy is protected, but display quality and liquid crystal efficiency are compromised
Solution Approach 1:
The patent implements dynamic control of viewing angle through voltage application to the control electrode members. The liquid crystal orientation and resulting viewing angle characteristics can be adjusted in real-time based on operational requirements, allowing the display to adapt between normal viewing mode and anti-peeping mode without compromising overall display quality.
Solution Approach 2:
The patent changes the electrical parameters (voltage) applied to the control electrode members to control liquid crystal orientation. By adjusting voltage parameters, the system can modify the viewing angle characteristics to achieve privacy protection while maintaining display quality through precise parameter control rather than fixed structural modifications.
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 effectively reduces the viewing angle to prevent unauthorized viewing while maintaining light weight, small thickness, and high display quality, and simplifies processing by replacing traditional metal bridges with transparent bridging lines.
Implementation Method 1
when a voltage is applied on the patterned viewing angle control transparent electrode layer, rotation of LC can be controlled to achieve efficacy of anti-peeping
Data Source
AI summary
A touch display apparatus includes a first substrate including first and second surfaces, a second substrate having a side facing the second surface and provided with a pixel electrode layer, an insulator layer and a common electrode layer, and a liquid crystal (LC) layer disposed between the first and second substrates. The second surface is provided with opening areas, a non-opening area surrounding the opening areas, a black matrix layer, a color filter layer, a protection layer, a touch electrode layer, first and second flat layers, and a patterned viewing angle control transparent electrode layer including control electrode members disposed corresponding to the opening areas, first connection electrode members disposed corresponding to the non-opening area in a first direction and connected to the control electrode members, and second connection electrode members disposed corresponding to the non-opening area in a second direction and connected to the first connection electrode members.