Light Guide Plate Tilted Edge V-Grooves Hot Spot Elimination
Solution Overview
Problem
Current liquid crystal display (LCD) light guide plates (LGP) suffer from hot spots on the incident edge, which reduces light utilization efficiency and visual quality, especially in outdoor applications where higher lightness is demanded.
Innovation Solution
The LGP features an incident edge with a tilted surface and V-shaped grooves that diffuse light, preventing hot spots by distributing light evenly, and a corresponding light source module with a supporting frame and reflector to enhance light utilization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional flat incident edge is used in the light guide plate, then the structure is simple and easy to manufacture, but hot spots occur on the incident edge reducing light utilization efficiency
Solution Approach 1:
The incident edge is divided into different regions with different structures: a tilted surface with V-shaped grooves in the first region, and a flat surface in the second region. This local differentiation allows the tilted surface to diffuse light and eliminate hot spots, while maintaining a simple flat structure in other areas for ease of manufacture.
Solution Approach 2:
The incident edge incorporates a tilted surface with a specific angle (10°-80°) instead of a flat surface. This angular modification changes the light incidence pattern, causing light to scatter more uniformly and eliminate hot spots while improving light utilization efficiency.
2Object-generated harmful factors
If the tilted surface angle is increased to improve light diffusion, then hot spot elimination is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The tilted surface angle is optimized within a specific range (10°-80°) to achieve effective hot spot elimination. This parameter optimization balances the light diffusion effect with manufacturing feasibility, avoiding excessive precision requirements while maintaining hot spot elimination effectiveness.
3Object-generated harmful factors
If V-shaped grooves are added to the tilted surface to enhance light diffusion, then hot spot elimination is improved, but device complexity increases
Solution Approach 1:
The tilted surface is segmented with V-shaped grooves that divide the light path into multiple directions. This segmentation effectively diffuses light to eliminate hot spots while using a simple V-shaped geometry that does not significantly increase manufacturing 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 eliminates hot spots on the incident edge, improving light distribution and utilization efficiency, resulting in enhanced visual performance and increased lightness for outdoor use.
Implementation Method 1
V-shaped grooves that diffuse light, preventing hot spots by distributing light evenly
Implementation Method 2
When the light from a light source strikes on a tilted surface, on which V-shaped grooves make the light diffused
Implementation Method 3
the light source module further comprises a reflector configured on the vertical face
Data Source
AI summary
A light guide plate includes an incident edge and a plurality of V-shaped grooves. The incident edge includes a tilted surface, a vertical surface, a top surface and a bottom surface. The top surface is configured in parallel with the bottom surface. The top surface joins with an end of the tilted surface. The bottom surface joins with the other end of the tilted surface. The plurality of V-shaped grooves extend in a predetermined direction and are configured on the tilted surface. When the light from a light source strikes on a tilted surface, on which V-shaped grooves make the light diffused, and the diffused light is in conformity on the incident edge, having no hot spot there.