Light Guide Plate Arc Surface and Optical Recesses for Uniform Illumination
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Solution Overview
Problem
Conventional liquid crystal displays experience light loss and reduced display quality due to the inefficiencies in light distribution from point light sources, leading to dark areas and uneven brightness.
Innovation Solution
The use of a light guide plate with an arc-shaped opposite surface and inclined second surfaces forming optical recesses, which transforms the light from a point light source into a rectangular brightness distribution, reducing dark areas and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a point light source is used, then power consumption is reduced and slimness is improved, but light distribution becomes uneven causing dark areas and reduced display quality
Solution Approach 1:
The light guide plate is divided into multiple functional surfaces: a light incident surface with optical recesses for receiving light, an arc-shaped opposite surface for reflecting light, connection surfaces for transitioning between surfaces, and an upper surface for outputting light. This segmentation allows each surface to perform its specific function optimally, transforming point light into uniform area light while maintaining energy efficiency.
2Device complexity
If a conventional light guide plate is used, then device simplicity is maintained, but light loss occurs and display quality deteriorates due to dark areas
Solution Approach 1:
The opposite surface of the light guide plate is designed with an arc shape that reflects light toward the upper surface. This curved geometry efficiently redirects light paths, ensuring uniform light distribution across the display area and minimizing light loss without requiring additional complex optical components.
Solution Approach 2:
Optical recesses are formed by creating inclined second surfaces that extend from the first surface in a predetermined direction, adding a dimensional feature to the light incident surface. This dimensional change enables the formation of polygonal pyramid-shaped optical recesses that effectively capture and distribute light, reducing dark areas while maintaining structural simplicity.
3Ease of manufacture
If the light incident surface is flat, then manufacturing is simple, but dark areas are created and display quality is reduced
Solution Approach 1:
The light incident surface incorporates optical recesses formed by inclined second surfaces that extend from the first surface in a predetermined direction. This dimensional modification creates polygonal pyramid-shaped recesses that effectively capture light from the point source and redistribute it uniformly, eliminating dark areas while maintaining ease of manufacture through straightforward surface geometry.
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 significantly improves the display quality by minimizing light loss and dark areas, resulting in a more uniform and efficient light distribution to the display panel.
Implementation Method 1
a plurality of second surfaces inclined from the first surface in an area corresponding to the light source such that at least one optical recess having a polygonal pyramid shape is defined by the second surfaces on the light incident surface
Implementation Method 2
an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape
Implementation Method 3
an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape
Data Source
AI summary
A display apparatus includes a light source and a light guide plate including a light incident surface facing the light source and which receive the light, an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape, connection surfaces at opposing sides of the light incident surface and which connect the light incident surface and the opposite surface, an upper surface connected to the light incident surface, the opposite surface and the connection surfaces and which outputs the light, and a lower surface opposite to the upper surface. The light incident surface of the light guide plate includes a first surface extending in a predetermined direction, and second surfaces inclined from the first surface in an area corresponding to the light source such that an optical recess having a polygonal pyramid shape is defined by the second surfaces.