Rounded Polygon Light Guide Plate for Uniform LCD Illumination
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Solution Overview
Problem
The existing light guide plates in liquid crystal display devices suffer from decreased optical efficiency and luminance due to scattering patterns formed on their surfaces, which lead to non-uniform luminance and potential hot spots in the display.
Innovation Solution
A light guide plate with rounded polygon patterns on its lower surface, specifically in the shape of a wedge, is designed to converge light in a specific direction, improving luminance by spreading light between adjacent patterns for uniform illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If scattering patterns are formed on the light guide plate surface, then light distribution is improved, but luminance uniformity deteriorates and hot spots occur
Solution Approach 1:
The patent applies curvature by forming rounded polygon patterns instead of sharp-edged patterns on the light guide plate. The rounded corners and curved surfaces of the patterns modify light scattering behavior to prevent concentrated light paths that cause hot spots, while still achieving uniform light distribution across the display area.
Solution Approach 2:
The patent implements local quality by creating patterns with specific geometric characteristics (rounded polygons with controlled side lengths and angles) in different regions of the light guide plate. This allows optimization of light scattering in specific areas to maintain luminance uniformity while preventing hot spots.
2Loss of energy
If conventional scattering patterns are used, then light guidance is achieved, but optical efficiency decreases
Solution Approach 1:
The rounded polygon patterns with curved surfaces improve optical efficiency by reducing light loss through more effective scattering. The curved geometry allows better control of light paths, minimizing energy loss while maintaining or enhancing luminance output compared to conventional sharp-edged patterns.
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 enhances luminance uniformity and prevents hot spots by directing light in a specific direction, thereby improving the optical efficiency and display quality of liquid crystal display devices.
Implementation Method 1
a plurality of light converging patterns in a rounded wedge shape having a rounded upper surface on a lower surface of the main body to converge and reflect the incident light in the predetermined direction
Implementation Method 2
Light emitted from the lamps 11 installed in both side faces of the light guide plate 13, respectively, is incident on a side face of the light guide plate 13, and the incident light is transmitted from an upper surface of the light guide plate 13
Data Source
AI summary
Provided is a light guide plate including: a main body for guiding incident light and transmitting the incident light from an upper surface of the main body; and a plurality of light converging patterns in a rounded wedge shape having a rounded upper surface on a lower surface of the main body to converge and reflect the incident light in a predetermined direction.