Display Panel Specular Reflection Uniformity via Optical Zone Segmentation
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Solution Overview
Problem
Mirror display panels face challenges in uniforming the specular reflection effect between the display area and the peripheral area, affecting user experience due to differences in structure and weight.
Innovation Solution
A display panel configuration with a first substrate and a second substrate, including a polarization layer, quarter wave plates, a reflection layer, and a light absorption layer, which allows switching between image and specular reflection modes to unify the reflection effect by attenuating light beams and using materials like aluminum, gold, or molybdenum oxide for the reflection layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional semi lens glass is used on the display panel, then the display area and peripheral area can provide specular reflection functions, but the specular reflection effects are different due to different structures, affecting user experience
Solution Approach 1:
The patent divides the optical control into different zones: the display area uses a first optical stack with specific layers for image display, while the peripheral area uses a second optical stack with different configurations for specular reflection. This segmentation allows each zone to be optimized independently, resolving the contradiction between uniform reflection effect and structural complexity.
Solution Approach 2:
The patent applies different optical structures to different regions: the display area employs a configuration optimized for image display with specific polarization and liquid crystal layers, while the peripheral area uses a configuration optimized for mirror reflection with different layer arrangements. This local quality approach ensures each region performs its specific function optimally while maintaining overall system coherence.
2Weight of moving object
If traditional mirror display panel structure is used, then specular reflection function is provided, but the weight cannot be lightened
Solution Approach 1:
The patent changes the optical parameters and material composition of the optical stacks in different regions. By adjusting the arrangement, thickness, and material properties of polarization layers, liquid crystal layers, and optical compensation layers, the patent achieves lightweight construction while maintaining effective specular reflection in the peripheral area and image display in the display area.
3Ease of operation
If the display area and peripheral area have different structures, then their functions can be optimized, but the boundary between them becomes identifiable, affecting user experience
Solution Approach 1:
The patent extracts the specular reflection function from the entire display surface and confines it specifically to the peripheral area, while the display area maintains its image display function. This extraction creates a clear functional separation where the peripheral mirror region and display region serve distinct purposes, reducing boundary identifiability issues by making the functional division intentional and optimized.
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 unifies the specular reflection effect across the display and peripheral areas, enhancing user experience by reducing the identifiability of the boundary and allowing for a lightweight design.
Implementation Method 1
The first polarization layer, located within the display area and the peripheral area, comprises a wire-grid polarizer
Implementation Method 2
The first quarter wave plate is located within the peripheral area. The first quarter wave plate is located between the first polarization layer and the reflection layer
Implementation Method 3
The reflection layer is located within the peripheral area
Implementation Method 4
The second substrate further comprises a light absorption layer. The light absorption layer is located between the first polarization layer and the pixel array
Data Source
AI summary
A display panel has a display area and a peripheral area. The peripheral area is located outside the display area. The display panel includes a first substrate, a second substrate, and a display medium layer. The second substrate is located above the first substrate and includes a first polarization layer, a first quarter wave plate (QWP), a reflection layer, and a pixel array. The first polarization layer is located within the display area and the peripheral area and includes a wire-grid polarizer. The first QWP is located within the peripheral area. The reflection layer is located within the peripheral area, in which the first QWP is located between the first polarization layer and the reflection layer. The pixel array is at least located within the display area. The display medium layer is located between the first substrate and the second substrate.