Viewing Angle Switching Assembly for Display Panel
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Solution Overview
Problem
Existing display devices lack a solution to switch seamlessly between private protection mode and display sharing mode without increasing the thickness of the display panel.
Innovation Solution
A display panel design that incorporates a sidewall electrode and charged particles in an accommodating cavity, allowing the electrical polarity of the sidewall electrode to control the attraction of charged particles, thereby switching between private protection and display sharing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a privacy film is attached on the display panel, then private protection function is provided, but the display panel cannot switch between private protection mode and display sharing mode
Solution Approach 1:
The patent applies dynamics by making the display panel's privacy protection state switchable rather than static. The electrophoretic particles can dynamically change their orientation and distribution in response to electrical signals, allowing the display to transition between private protection mode (particles block oblique viewing angles) and display sharing mode (particles align to allow viewing). This dynamic behavior resolves the contradiction by enabling mode switching while maintaining privacy protection functionality.
2Adaptability or versatility
If a dimming box is provided with the display panel to enable mode switching, then switching between private protection mode and display sharing mode is achieved, but the thickness of the display panel is greatly increased
Solution Approach 1:
The patent merges the privacy protection function directly into the display panel structure by integrating electrophoretic particles within the panel layers. Instead of adding a separate dimming box component, the privacy control mechanism is combined with the existing display structure. The particles are embedded in a medium between the substrate and encapsulation layer, sharing space with other display components. This merging approach enables mode switching capability while avoiding significant thickness increase.
3Adaptability or versatility
If charged particles are used for mode switching, then switching between private protection mode and display sharing mode is enabled, but the structure becomes more complex
Solution Approach 1:
The patent applies self-service by utilizing the inherent electrophoretic effect of charged particles in an electric field. The particles automatically orient and move in response to the applied voltage without requiring complex mechanical actuators or additional control mechanisms. The electric field itself serves as both the control signal and the actuation mechanism, eliminating the need for separate driving structures. This self-service approach enables mode switching while keeping the overall structure relatively simple.
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
Enables switching between private protection and display sharing modes without significantly increasing the thickness of the display panel, providing effective privacy control while maintaining a slim form factor.
Implementation Method 1
the sidewall electrode is configured to have a second electrical polarity in a private protection mode... each of the charged particles has a first electrical polarity... the first electrical polarity and the second electrical polarity are opposite
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate; a light-emitting layer disposed on the substrate; a plurality of separating plates disposed on the light-emitting layer; an encapsulation layer disposed on the plurality of separating plate; and a viewing angle switching assembly disposed in the accommodating cavity. The substrate, the plurality of separating plates, and the encapsulation layer define an accommodating cavity. The viewing angle switching assembly includes a sidewall electrode disposed on the separating plate and charged particles having a first electrical polarity disposed in the accommodating cavity. In a private protection mode, the sidewall electrode has a second electrical polarity opposite to the first electrical polarity.