Liquid Crystal Display Panel Polarizer Placement for Reflection Reduction
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Solution Overview
Problem
In traditional liquid crystal displays, strong ambient light reflects multiple times between the packaging cover plate and the display panel body, causing a color washout phenomenon at large viewing angles, leading to poor user experience.
Innovation Solution
A liquid crystal display panel design that includes a packaging cover plate with a first polarizer and optionally a quarter-wave plate, positioned on the light-emitting side of the display module, which reduces the intensity and amount of ambient light reflected, preventing color washout by ensuring it does not enter the viewer's eyes, even at specular reflection angles. This design also incorporates a large viewing angle polarizer and a touch layer, with protrusions on the packaging cover plate to further reduce specular reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a packaging cover plate is used to protect the display panel body, then the display panel body is protected, but strong ambient light reflects multiple times between the packaging cover plate and the display panel body causing color washout at large viewing angles
Solution Approach 1:
A first polarizer is introduced as an intermediary component between the packaging cover plate and the display panel body. This polarizer filters ambient light by allowing only light waves oscillating in a specific direction to pass through, thereby reducing the intensity of reflected light that causes color washout at large viewing angles while maintaining the protective function of the packaging cover plate
Solution Approach 2:
The invention changes the optical parameters of the system by introducing polarizing filters that modify the polarization state of light. The first polarizer and second polarizer (in some embodiments) alter the polarization direction and intensity of ambient light, transforming the optical interaction between the packaging cover plate and display panel body to reduce harmful reflections
2Object-affected harmful factors
If a first polarizer is added to the packaging cover plate to reduce ambient light reflection, then color washout is prevented, but the device complexity increases
Solution Approach 1:
The packaging cover plate is designed with multi-functionality by integrating the first polarizer directly into its structure. This allows the packaging cover plate to simultaneously serve as both a protective element and an optical filtering element, reducing ambient light reflection without requiring a completely separate complex optical system
Solution Approach 2:
The first polarizer is merged with the packaging cover plate structure, combining the protective function of the cover plate with the optical filtering function of the polarizer. This integration reduces the number of separate components and simplifies the overall device structure while achieving the desired reduction in ambient light reflection
Data Source
AI summary
A liquid crystal display panel and a liquid crystal display device are disclosed. The liquid crystal display panel includes a display module and a packaging cover plate disposed on a light-emitting side of the display module. The packaging cover plate includes a cover plate body and a first polarizer, wherein the first polarizer is disposed on a side of the cover plate body adjacent to the display module and/or on a side of the cover plate body away from the display module.