Piezoelectric Light Blocking Pattern for Dynamic Viewing Angle Control
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Solution Overview
Problem
Display devices lack effective privacy protection mechanisms, particularly in adjusting the viewing angle to prevent external visibility of the screen content.
Innovation Solution
The display device incorporates an input sensing panel with a piezoelectric pattern and light blocking pattern that change volume in response to voltage, adjusting the light emitting area and viewing angle to enhance privacy by reducing the visible area when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light emitting area is made large to improve visibility and display quality, then the viewing angle increases and more users can see the screen, but privacy protection deteriorates as external parties can also see the screen content
Solution Approach 1:
The patent applies the dynamics principle by making the light blocking pattern movable and adjustable. The light blocking pattern can be positioned at different locations and sizes to dynamically control the viewing angle and light emitting area. This allows the display device to switch between wide visibility mode (large light emitting area) and privacy protection mode (small light emitting area with blocked viewing angles), resolving the contradiction between visibility and privacy protection.
2Object-affected harmful factors
If a fixed light blocking pattern is used to protect privacy, then external visibility is reduced, but the ability to adjust viewing angle and adapt to different usage scenarios is lost
Solution Approach 1:
The light blocking pattern is designed to be dynamically adjustable rather than fixed. It can be positioned at different locations and sized differently to adapt to various usage scenarios. This dynamic capability allows the system to maintain privacy protection while adapting to different viewing requirements, thus resolving the contradiction between privacy protection and adaptability.
Solution Approach 2:
The light blocking pattern serves multiple functions: it blocks external visibility for privacy protection, it defines the light emitting area boundaries, and it can be adjusted to accommodate different viewing scenarios. This multi-functionality allows a single component to address both privacy concerns and adaptability requirements simultaneously.
3Ease of operation
If the viewing angle is increased to allow more users to view the screen simultaneously, then display accessibility improves, but privacy protection deteriorates as screen content becomes visible from more directions
Solution Approach 1:
The system dynamically adjusts the light blocking pattern to control viewing angles. When wide accessibility is needed, the light blocking pattern is positioned to allow broader viewing. When privacy protection is prioritized, the light blocking pattern is adjusted to restrict viewing angles. This dynamic adjustment resolves the contradiction between viewing accessibility and privacy protection by allowing the system to adapt to different operational requirements.
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
This solution effectively blocks the viewing angle from external parties, thereby improving the privacy protection function of the display device by dynamically adjusting the light emitting area.
Implementation Method 1
a piezoelectric pattern covering the second conductive patterns
Data Source
AI summary
A display device comprises a display panel including a pixel providing a light and an input sensing panel sensing an external input. The input sensing panel includes a first sensing insulating layer disposed on the display panel, first conductive patterns disposed on the first sensing insulating layer, a second sensing insulating layer covering the first conductive patterns, second conductive patterns disposed on the second sensing insulating layer, a piezoelectric pattern covering the second conductive patterns, a light blocking pattern covering the piezoelectric pattern and defining a transmission opening transmitting the light, and a third sensing insulating layer covering the light blocking pattern.