Light Source Module Optical Microstructures for Display Privacy
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Solution Overview
Problem
Existing privacy protection technologies for display apparatuses interfere with side viewing angles, affecting user operation and display quality.
Innovation Solution
A light source module comprising a light guide plate, a first light source, and a plurality of optical microstructures, where the optical microstructures have a first optical surface facing the light source, and first and second structural surfaces perpendicular to the light incident surface, with included angles between the optical surface and the light guide plate surface that gradually change with distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If optical microstructures are added to direct light for privacy protection, then privacy protection is improved, but side viewing angle interference increases
Solution Approach 1:
The patent applies local quality by designing optical microstructures with varying included angles at different positions on the light guide plate. The included angle changes from the edge toward the center, causing light to be directed differently in different regions. This ensures that privacy protection is achieved in the appropriate direction while minimizing interference in non-privacy protection areas, as each region's optical microstructures are optimized for its specific function.
2Ease of manufacture
If optical microstructures with fixed included angle are used, then manufacturing is simplified, but display quality in non-privacy areas deteriorates
Solution Approach 1:
The patent applies parameter changes by varying the included angle of the optical microstructures across different regions of the light guide plate. Instead of using a fixed included angle, the included angle is designed to change from the edge toward the center. This gradient in the included angle parameter allows the system to achieve both privacy protection and maintain display quality in non-privacy areas, while the manufacturing process remains relatively simple using conventional lithography and etching techniques.
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 directs light beams to create a privacy protection area while minimizing interference with non-privacy protection areas, enhancing display quality and user experience.
Implementation Method 1
The first light beams transmitted in the light guide plate emit from a second surface of the light guide plate after being reflected by the plurality of first optical surfaces of the optical microstructures
Data Source
AI summary
A display apparatus and a light source module thereof including a light guide plate, a first light source and a plurality of optical microstructures are provided. The first light source is disposed on one side of a first light incident surface of the light guide plate, and is adapted to emit a plurality of first light beams toward the first light incident surface. The optical microstructures are disposed on a first surface of the light guide plate, and each has a first optical surface facing the first light source, a first structural surface and a second structural surface. A first included angle provided between the first optical surface and the first surface of each of the optical microstructures gradually changes as a distance from the first surface increases. The first structural surface and the second structural surface of each optical microstructure are perpendicular to the first light incident surface.