Light Guide Plate Ionizing Radiation Curing Optical Precision
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Solution Overview
Problem
Conventional light guide plates produced by injection molding or thermal transfer processing struggle to achieve excellent optical properties, making it difficult to maintain accuracy and functionality, especially in thinner display devices with larger screens, leading to issues like light discoloration and the need for additional optical members.
Innovation Solution
A light guide plate with a light exit-side layer formed by curing an ionizing radiation curable resin, featuring unit shaped elements arranged in a specific direction, which enhances optical effects and prevents light discoloration, and a body portion with a light scattering component for improved light distribution and condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional injection molding or thermal transfer processing is used to produce light guide plates, then manufacturing simplicity is maintained, but optical precision and functional accuracy deteriorate, leading to light discoloration and inability to achieve excellent optical properties
Solution Approach 1:
The patent replaces conventional mechanical processing methods (injection molding, thermal transfer processing) with ionizing radiation processing to form the light exit-side layer. This substitution enables precise control of layer thickness and optical properties without the limitations of mechanical molding, achieving excellent optical precision while maintaining manufacturing feasibility through a different technological approach
Solution Approach 2:
The patent changes the fundamental processing parameter from mechanical/thermal methods to ionizing radiation methods. By using ionizing radiation to cure the resin and form the light exit-side layer, the process achieves superior optical precision and functional accuracy that cannot be obtained through conventional molding or thermal transfer techniques
2Reliability
If additional optical members are added to improve optical properties, then optical performance is enhanced, but device complexity and production cost increase
Solution Approach 1:
The patent merges the light guide plate body with the light exit-side layer having optical elements into a single integrated structure. The light exit-side layer is formed directly on the light guide plate through ionizing radiation processing, eliminating the need for separate optical members and reducing device complexity while maintaining excellent optical performance
Solution Approach 2:
The light guide plate is designed to perform multiple functions: it guides light from the edge source and simultaneously contains the light exit-side layer with optical elements that control light extraction and angular distribution. This multi-functional integration reduces the number of separate components needed in the system
3Length of moving object
If display devices are made thinner with larger screens, then device thickness is reduced, but manufacturing accuracy of light guide plates becomes difficult to maintain
Solution Approach 1:
The patent replaces mechanical molding methods with ionizing radiation processing to form the light exit-side layer. This substitution enables precise control of layer thickness and optical properties even in thin, large-screen displays, overcoming the limitations of conventional mechanical methods which cannot achieve the required precision in such applications
Solution Approach 2:
The patent applies local quality by forming the light exit-side layer only on the specific region where light extraction is needed, with precise control over layer thickness and optical properties. This localized processing enables high precision in thin display structures without affecting the overall device thickness
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 enables the production of light guide plates with excellent optical properties, reducing the number of optical members needed, lowering production costs, and facilitating thinner, more efficient surface light source devices with enhanced light directionality and reduced discoloration.
Implementation Method 1
a light exit-side layer disposed on a side of the light exit surface side relative to the body portion and formed by curing of an ionizing radiation curable resin
Implementation Method 2
The light traveling in the light guide plate, by the optical action of the light guide plate, is caused to gradually exit the light exit surface as it travels in the light guide plate
Implementation Method 3
a light scattering component is dispersed in the light guide plate so that light, traveling in the light guide plate, is allowed to gradually exit the light guide plate
Implementation Method 4
The light that has entered the light guide plate repeats reflection at a pair of opposing main surfaces and travels in the light guide plate in a direction (light guide direction) almost perpendicular to the light entrance surface
Data Source
AI summary
A light guide plate has a light exit surface, a back surface opposed to the light exit surface, and a light entrance surface consisting of at least part of a side surface. The light guide plate also has a body portion, and a light exit-side layer formed from an ionizing radiation curable resin. The light exit-side layer includes an optical element portion which defines the light exit surface. The optical element portion includes unit shaped elements arranged in one direction intersecting a light guide direction, each unit shaped element extending linearly in a direction intersecting the one direction.