Cylindrical Light Unit for Uniform Display Illumination
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Solution Overview
Problem
Conventional light units for non-self-emissive display devices, such as liquid crystal displays, typically have a planar structure that limits the ability to provide uniform light distribution across cylindrical surfaces, restricting the viewing angle and display quality.
Innovation Solution
A light unit with a cylindrical structure, featuring a light source surrounded by a diffuser and optical sheets, which disperses light uniformly in all directions, allowing for a cylindrical display device that can be viewed from various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar light unit structure is used, then the structure is simple and easy to manufacture, but the light distribution uniformity on cylindrical surfaces is poor
Solution Approach 1:
The patent applies curvature by transforming the planar light unit structure into a cylindrical configuration. The light guide plate is formed with a cylindrical outer surface that matches the cylindrical display panel, enabling uniform light distribution across the curved surface. This structural curvature resolves the contradiction by making the light unit suitable for cylindrical displays while maintaining manufacturability through injection molding techniques.
2Device complexity
If a planar light unit structure is used, then the device complexity is low, but the viewing angle is limited
Solution Approach 1:
The cylindrical structure of the light guide plate enables the display to be viewed from multiple angles around the circular configuration. The curved surface naturally distributes light in all radial directions, providing omnidirectional viewing capability that resolves the contradiction between simple device structure and enhanced viewing angle adaptability.
3Manufacturing precision
If a cylindrical light unit structure is used, then the light distribution uniformity on cylindrical surfaces is improved, but the device complexity increases
Solution Approach 1:
The cylindrical light guide plate performs multiple functions: it guides light from the light source, distributes light uniformly across the curved surface, and provides the structural framework for the cylindrical display. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity while achieving uniform light distribution.
Solution Approach 2:
The patent merges the light guiding function and the structural support function into a single cylindrical light guide plate component. By combining these functions, the design avoids the need for separate structural elements, thus reducing overall device complexity while maintaining the cylindrical configuration necessary for uniform light distribution.
4Adaptability or versatility
If a cylindrical light unit structure is used, then the viewing angle is increased, but the device complexity increases
Solution Approach 1:
The cylindrical geometry inherently provides omnidirectional light distribution, enabling viewing from all angles around the display. This geometric solution achieves enhanced viewing angle adaptability without requiring complex optical systems or multiple light sources, thus limiting the increase in device complexity while maximizing viewing versatility.
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 cylindrical light unit enhances display recognition by providing uniform light intensity across the cylindrical surface, increasing the viewing angle and improving display quality by ensuring consistent image visibility from different directions.
Implementation Method 1
a diffuser separated from the light source at a predetermined distance and having a cylindrical structure... which disperses light uniformly in all directions
Implementation Method 2
At least one optical sheet disposed along an outer surface of the diffuser
Data Source
AI summary
The inventive concept relates to a light unit and a diffuser separated from the light source at a predetermined distance and having a cylindrical structure, and a cylindrical structure display device including the same.