Switch Panel Structure for Privacy Viewing Angle Control
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Solution Overview
Problem
Display devices with wide viewing angles can inadvertently expose confidential information to bystanders, necessitating a solution that allows switching between viewing modes with different angles while maintaining display quality.
Innovation Solution
A display device incorporating a switch panel with a shielding pattern layer and a light transmitting layer, along with a liquid crystal layer, enables switching between wide and narrow viewing angles by altering the power supply to pixel electrodes, enhancing display quality in both modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide viewing angle display is used, then the display can be viewed from multiple angles, but confidential information can be easily exposed to bystanders
Solution Approach 1:
The patent applies a switch panel with liquid crystal layer that can dynamically change the viewing angle characteristics. By controlling the liquid crystal molecules through voltage applied to pixel electrodes, the display can switch between wide viewing angle mode (for sharing) and narrow viewing angle mode (for privacy), making the viewing angle property dynamic rather than fixed
Solution Approach 2:
The patent changes the optical parameters of the display by controlling the liquid crystal layer's molecular orientation through voltage. By adjusting the voltage applied to pixel electrodes, the display modifies its viewing angle characteristics and light transmission properties to achieve different viewing modes
2Adaptability or versatility
If a switch panel with liquid crystal layer is added to enable viewing angle switching, then viewing mode flexibility is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the switch panel functionality directly with the display panel structure. The liquid crystal layer, pixel electrodes, and shielding pattern layer are integrated into the display panel assembly, combining the viewing angle switching function with the display function in a unified structure rather than using separate components
Solution Approach 2:
The switch panel structure serves multiple functions: it acts as both the display panel and the viewing angle control mechanism. The liquid crystal layer and pixel electrodes perform both the display function and the viewing angle switching function, making the structure multi-functional and reducing overall system complexity
3Object-affected harmful factors
If the light transmitting layer has filling parts with greater thickness, then light shielding performance is improved, but light transmission for display quality may be affected
Solution Approach 1:
The patent applies local quality by creating different thickness regions in the light transmitting layer. The filling parts have greater thickness for enhanced light shielding in specific areas, while other regions maintain appropriate thickness for light transmission. This spatial variation in thickness allows different areas to serve different optical functions simultaneously
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 achieves narrow viewing angles for privacy and wide viewing angles for sharing, maintaining or improving display quality by controlling light transmission and leakage.
Implementation Method 1
a liquid crystal layer disposed between the first substrate and the second substrate
Implementation Method 2
The liquid crystal layer is disposed between the first substrate and the second substrate... by altering the power supply to pixel electrodes
Implementation Method 3
a shielding pattern layer disposed between a liquid crystal layer of the switch panel and the display panel... includes multiple opening parts and multiple light shielding parts arranged alternately
Implementation Method 4
a light transmitting layer and between the liquid crystal layer and the shielding pattern layer... maintaining or improving display quality by controlling light transmission
Data Source
AI summary
A display device includes a display panel and a switch panel. The switch panel includes a first substrate disposed on the display panel, a shielding pattern layer, a light transmitting layer, pixel electrodes disposed on the light transmitting layer, a second substrate disposed on the pixel electrodes, and the liquid crystal layer disposed between the first substrate and the second substrate. The shielding pattern layer is disposed on the first substrate and includes opening parts and light shielding parts arranged alternately with the opening parts. Each of the light shielding parts has a first thickness. The light transmitting layer is disposed on the shielding pattern layer and includes filling parts filling the opening parts and extending parts arranged alternately with the filling parts. Each of the filling parts has a second thickness greater than the first thickness.