Transflective Array Substrate Rough Surface for Diffuse Reflection
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Solution Overview
Problem
Existing liquid crystal display (LCD) technologies face challenges in achieving clear display performance both indoors and outdoors due to low backlight utilization, leading to poor diffuse reflection effects and limited viewing angles, especially under strong light conditions.
Innovation Solution
The development of a transflective array substrate with a reflection region featuring a particle layer providing a granular rough surface and a reflection electrode with an uneven, continuous shape, which enhances diffuse reflection and reduces specular reflection, thereby improving viewing angles and visual effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight structure is used, then the display can be seen indoors, but the utilization ratio of light is greatly decreased and the display cannot be seen clearly outdoors with strong light
Solution Approach 1:
The display screen is divided into two distinct regions: a pixel region for displaying images and a reflection region for enhancing ambient light reflection. This segmentation allows the device to simultaneously utilize both backlight and ambient light, improving overall light utilization efficiency and display visibility under different lighting conditions.
Solution Approach 2:
The reflection region serves multiple functions: it reflects ambient light to enhance display visibility outdoors, reduces glare from strong light sources, and complements the backlight system. This multi-functionality resolves the contradiction between indoor and outdoor display performance while improving backlight utilization.
2Illumination intensity
If a smooth reflecting layer is used, then the manufacturing process is simple, but the diffuse reflection effect is poor and viewing angles are limited
Solution Approach 1:
The reflecting layer is designed with locally varied properties: the pixel region maintains a relatively smooth surface for standard display function, while the reflection region features a rough surface with microparticles for enhanced diffuse reflection. This local differentiation optimizes each region's function without unnecessarily complicating the entire structure.
Solution Approach 2:
The reflection region incorporates a rough surface with microparticles that create curved and irregular micro-structures. These micro-curves and spherical-like particle shapes scatter light in multiple directions, significantly improving diffuse reflection effect and viewing angles compared to a flat smooth surface.
3Ease of operation
If a rough surface is created on the reflecting layer, then the diffuse reflection effect is improved, but the manufacturing precision and surface uniformity become difficult to control
Solution Approach 1:
A resin layer is introduced as an intermediary material between the base substrate and the reflection region. This resin layer serves as a medium to embed microparticles and create the desired rough surface structure. By controlling the resin layer's properties and the particle embedding process, the patent achieves both the required surface roughness for diffuse reflection and acceptable manufacturing precision.
Solution Approach 2:
The patent controls the roughness parameters of the reflection region by adjusting particle size distribution, particle concentration, and resin layer thickness. These parameter changes allow optimization of diffuse reflection effect while maintaining manufacturing feasibility and surface uniformity within acceptable tolerances.
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 significantly increases reflectivity and viewing angles while minimizing specular reflection, resulting in improved display performance under various lighting conditions.
Implementation Method 1
a particle layer 112, the particle layer 112 being configured to provide a granular rough surface 1111
Implementation Method 2
a reflection electrode 108 on the particle layer 112
Data Source
Figure 1~2
Figure 3~4A
Figure 4B~5
AI summary
Provided are an array substrate and a manufacturing method thereof, and a display device. The array substrate comprises a base substrate (101), a layered structure (1110), and a reflective electrode (108). The base substrate (101) comprises a pixel region (PR). The pixel region (PR) comprises a reflective region (RR). The layered structure (1110) is located in the reflective region (RR) and comprises a granular layer (112). The granular layer (112) is configured such that one side of the layered structure (1110) away from the base substrate (101) has a granular, rough surface (1111). The reflective electrode (108) is provided over the granular layer (112). The array substrate can enhance diffuse reflection of a reflective region.