Display Module Anti-Glare Light-Blocking Layer
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Solution Overview
Problem
Liquid crystal displays experience glare due to specular reflection from external ambient light, leading to a strong feeling of reflected light and color shifts that affect the quality of displayed images.
Innovation Solution
A display module with a first light-blocking layer on the light exit side, featuring light-filtering units and reflected light-reducing layers composed of refractive index mismatched layers, along with additional layers like a second light-blocking layer, roughened layer, and diffusion layer to reduce glare and enhance viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional liquid crystal display is used, then the display can show images, but external ambient light causes specular reflection resulting in glare and strong reflected light feeling
Solution Approach 1:
The light-blocking layer is divided into multiple light-filtering units corresponding to different pixels, with reflected light-reducing layers positioned between adjacent light-filtering units. This segmentation allows selective filtering of ambient light while maintaining display functionality and reducing overall glare through distributed reflection reduction.
Solution Approach 2:
Different regions of the display module have different optical properties - light-filtering units are positioned over pixels to allow display light through while blocking ambient light, and reflected light-reducing layers are placed between them to specifically address specular reflection. This local differentiation optimizes both display quality and anti-glare performance.
2Object-affected harmful factors
If light-filtering units are disposed corresponding to pixels, then ambient light can be filtered, but color shifts and image quality deterioration occur due to reflected light
Solution Approach 1:
The reflected light-reducing layers, which could potentially block useful light, are designed with specific optical properties (refractive index between 1.3-1.65, thickness 50-200 nm) to reduce harmful specular reflection while allowing display light to pass through. The anti-glare effect is achieved by converting the potentially harmful reflected light into beneficial diffuse reflection or absorption.
3Object-affected harmful factors
If reflected light-reducing layers with specific refractive indices are added, then anti-glare effect is achieved, but the device structure becomes more complex
Solution Approach 1:
The reflected light-reducing layers are designed with specific parameter ranges - refractive index between 1.3-1.65 and thickness between 50-200 nm - to optimize the anti-glare effect. By controlling these parameters, the layers effectively reduce specular reflection while maintaining transparency to display light, achieving anti-glare functionality without excessive complexity.
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 filters out ambient light, reduces reflected light, and improves image quality by preventing color blending and expanding the viewing angle, resulting in an anti-glare effect and enhanced picture quality.
Implementation Method 1
each reflected light-reducing layer includes a first refraction layer and a second refraction layer that are arranged in a stacking manner, and wherein a refractive index of the first refraction layer is not equal to a refractive index of the second refraction layer
Implementation Method 2
The refractive index of the first refraction layer is greater than the refractive index of the second refraction layer
Implementation Method 3
the first light-blocking layer includes a plurality of light-filtering units disposed at intervals and reflected light-reducing layers each of which disposed between the corresponding light-filtering units
Implementation Method 4
The second refraction layer includes a first matrix and first matting particles dispersed in the first matrix. The first refraction layer includes a second matrix and second matting particles dispersed in the second matrix
Implementation Method 5
The roughened layer is disposed between the second light-blocking layer and the first light-blocking layer. A surface of the roughened layer on a side of the roughened layer facing the first light-blocking layer is an uneven rough surface
Data Source
AI summary
A display module is provided. The display module includes a display panel and a first light-blocking layer. The display panel includes a plurality of pixels disposed at intervals. The first light-blocking layer is disposed on a light exit side of the display panel, and the first light-blocking layer includes a plurality of light-filtering units disposed at intervals and reflected light-reducing layers each of which disposed between the corresponding light-filtering units which are adjacent to each other. The light-filtering units are respectively disposed corresponding to the plurality of pixels. The display module can achieve an anti-glare effect, and have better quality of displayed pictures.