Anisotropic Prism Light Control Member for Display Viewing Angle
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Solution Overview
Problem
Display devices face challenges in controlling the viewing angle of emitted light, particularly in specific environments like driving, where limiting the viewing angle is desired to prevent image distortion from various user positions.
Innovation Solution
A light control member is introduced, comprising a substrate with an anisotropic prism and an absorptive pattern on its second side surface, along with a protective layer, which controls the emission angle by altering the path of light emitted from the display panel, preventing damage to the absorptive pattern and first side surface during manufacturing through a dry-etching process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the absorptive pattern is formed on the second side surface of the anisotropic prism without protection, then the viewing angle can be controlled, but the absorptive pattern and first side surface are damaged during the dry-etching manufacturing process
Solution Approach 1:
A protective layer is formed on the first side surface and second side surface of the anisotropic prism before the dry-etching process. This preliminary protective action prevents damage to the absorptive pattern and first side surface during manufacturing, while still allowing the anisotropic prism to control the viewing angle effectively
Solution Approach 2:
The protective layer acts as an intermediary between the dry-etching process and the absorptive pattern/first side surface. It shields the sensitive absorptive pattern from direct exposure to the etching process, preventing damage while allowing the manufacturing process to proceed
2Reliability
If the absorptive pattern protective layer is formed to cover the absorptive pattern material, then damage during dry-etching is prevented, but the device complexity increases
Solution Approach 1:
The protective layer serves multiple functions: it protects the absorptive pattern during dry-etching, maintains the integrity of the first side surface, and does not interfere with the optical functionality of the anisotropic prism. This multi-functionality justifies the additional structural element
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 controls the viewing angle to a desired position, preventing defects in optical properties and yield loss by protecting the absorptive pattern and first side surface during the manufacturing process, thus enhancing the display device's performance in environments requiring limited viewing angles.
Implementation Method 1
an anisotropic prism disposed on the substrate, where the anisotropic prism includes a first side surface extending at a first angle with respect to one surface of the substrate, and a second side surface extending at a second angle greater than the first angle with respect to the one surface of the substrate
Implementation Method 2
an absorptive pattern disposed on the second side surface of the anisotropic prism
Data Source
AI summary
A light control member comprises a substrate; an anisotropic prism disposed on the substrate and including a first side surface extending at a first angle and a second side surface extending at a second angle greater than the first angle, with respect to one surface of the substrate; an absorptive pattern disposed on the second side surface of the anisotropic prism; and an absorptive pattern protective layer disposed on the second side surface of the anisotropic prism and the absorptive pattern.