Mode Switching Electrode for Privacy Display Substrate
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Solution Overview
Problem
Current display technologies face challenges in providing privacy while maintaining cost-effectiveness and simplicity in manufacturing, as products that offer privacy are often more expensive and have complex manufacturing processes.
Innovation Solution
A display substrate with mode switching electrodes that switch between normal and privacy modes by generating electric fields, allowing for the formation of light leakage regions on the periphery of data lines, which reduces visibility from side angles, is integrated into a display panel. This is achieved through a configuration where mode switching electrodes are positioned on the substrate away from data lines, forming turbulent electric fields with other electrodes to control liquid crystal molecule deflection and create a light leakage region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mode switching electrodes are added to enable privacy mode switching, then privacy protection capability is improved, but device structure complexity increases
Solution Approach 1:
The mode switching electrode serves multiple functions: it acts as a standard electrode for normal display operation and simultaneously functions as a privacy mode switching electrode when applying specific voltage patterns. This multi-functionality allows the display panel to achieve privacy protection capability without adding dedicated separate structures, thereby improving adaptability while controlling structural complexity.
Solution Approach 2:
The electrode transitions between different functional states dynamically. By applying different voltage patterns (first voltage for normal mode, second voltage for privacy mode), the same electrode structure can switch between normal display function and privacy protection function, enabling the system to adapt to different operational requirements without physical reconfiguration.
2Adaptability or versatility
If electrodes are positioned to cover data lines for privacy mode, then light leakage control is improved, but manufacturing precision requirements increase
Solution Approach 1:
The electrode is divided into multiple segments or regions along its extension direction. By controlling the voltage applied to different segments independently, the system can create targeted light leakage regions at specific locations (such as data line peripheries) while maintaining normal display performance in other areas. This segmentation allows precise control of light leakage without requiring the entire electrode structure to be perfectly positioned.
Solution Approach 2:
Different regions of the electrode serve different functions: some regions are positioned to cover data lines for light leakage control in privacy mode, while other regions maintain normal display functionality. The electrode structure and voltage application are optimized locally to achieve the specific function required at each position, rather than requiring uniform precision across the entire structure.
3Adaptability or versatility
If turbulent electric fields are generated to deflect liquid crystal molecules, then privacy mode effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic or pulsed voltage application to generate turbulent electric fields only when privacy mode is activated. During normal operation, standard voltage patterns are applied. When privacy protection is needed, specific voltage patterns are applied periodically to create the turbulent fields that deflect liquid crystal molecules, thereby reducing energy consumption compared to continuous turbulent field generation while maintaining privacy mode effectiveness when required.
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 visibility from side angles, ensuring privacy while maintaining high transmissivity, low power consumption, and simplicity in manufacturing, thereby addressing the cost and complexity issues of existing privacy display technologies.
Implementation Method 1
the mode switching electrode is configured to switch display modes of the display panel, wherein the display modes include a normal mode and a privacy mode
Implementation Method 2
form turbulent electric fields which drive liquid crystal molecules to deflect under the privacy mode
Data Source
AI summary
Provided are a display substrate and a control method therefor, a display panel, and a display device. The display substrate is disposed in the display panel and includes a first substrate and multiple mode switching electrodes and multiple data lines disposed on the first substrate; wherein, the mode switching electrode is disposed on a side of the data line away from the first substrate and insulated from the data line, and an orthographic projection of the mode switching electrode on the first substrate covers part of an orthographic projection of the data line on the first substrate; and the mode switching electrode is configured to switch display modes of the display panel, wherein the display modes include a normal mode and a privacy mode.