Light Guide Plate Corner Step Patterns for Luminance Uniformity
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Solution Overview
Problem
Conventional light guide plates with irregular shapes lead to non-uniform luminance due to light concentration at corners, resulting in poor image quality and aesthetic issues in liquid crystal displays.
Innovation Solution
The implementation of a light guide plate with stepped edges and first step patterns, including a first tread and a first riser, at the reverse light incident plane corners to disperse light and reduce concentration, enhancing luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light guide plate has irregular shape with conventional corners, then manufacturing is simpler, but light concentration occurs at corners causing non-uniform luminance
Solution Approach 1:
The corner region of the light guide plate is segmented into multiple surfaces through stepped edges and step patterns, dividing the light interaction into distinct zones. This segmentation prevents light concentration by creating multiple reflection and emission paths at corners, thereby improving luminance uniformity while maintaining manufacturability through standardized molding processes.
Solution Approach 2:
The light guide plate applies different structural characteristics to different regions: the corner regions feature stepped edges and step patterns with specific geometric parameters, while the main body maintains a uniform structure. This local differentiation addresses light concentration at corners without complicating the overall manufacturing process.
2Illumination intensity
If light guide plate corners are modified with curvature or chamfer, then light concentration is reduced, but manufacturing complexity increases
Solution Approach 1:
Instead of modifying corner geometry in the planar dimension (curvature or chamfer), the invention introduces a vertical dimension through stepped edges and step patterns. This dimensional transition creates multiple light emission surfaces that effectively disperse corner light concentration while maintaining relatively simple manufacturing through conventional molding 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 disperses light at corners, improving luminance uniformity and image quality by preventing light from being concentrated in specific regions, thus addressing the issue of non-uniform illumination.
Implementation Method 1
The light guide plate having a light incident plane on which light is incident from a light source and a reverse light incident plane facing the light incident plane, includes at least one of corners of the reverse light incident plane having a curvature, a chamfered shape, or a plurality of first step patterns including a first tread and a first riser
Data Source
AI summary
A light guide plate and a liquid crystal display are disclosed. The light guide plate having a light incident plane on which light is incident from a light source and a reverse light incident plane facing the light incident plane, includes at least one of corners of the reverse light incident plane having a curvature, a chamfered shape, or a plurality of first step patterns including a first tread and a first riser.