Light Guide Plate Microprojections Prevent Interference Fringes
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Solution Overview
Problem
Existing light emitting display devices using light guide plates face issues with interference fringes due to warping, which can lead to reduced display effects and increased manufacturing costs, especially when the plates come into contact or approach each other within a certain distance, and are difficult to visually conceal.
Innovation Solution
Incorporating a microprojection group with specific height and arrangement on the surface of the light guide plates to maintain a separation distance that prevents interference fringes, while also forming microrecesses and microprojections on the same surface to enhance manufacturing efficiency and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a spacer is disposed between light guide plates to secure a clearance, then interference fringes can be prevented, but light progress inside the light guide plates is hindered by the screw and manufacturing complexity increases
Solution Approach 1:
The invention extracts the harmful screw element from the structure and replaces it with a simpler spacer configuration. The spacer is positioned to maintain clearance between light guide plates without interfering with light paths, eliminating the need for screws while preventing interference fringes.
Solution Approach 2:
The spacer acts as an intermediary element between light guide plates, maintaining the necessary clearance to prevent contact and interference fringes. This mediator component simplifies the overall structure by eliminating the need for screw fasteners that would block light paths.
2Object-affected harmful factors
If the spacer is disposed at the end of light guide plates to avoid visual recognition, then the spacer is difficult for players to visually recognize, but there is nothing to hold the clearance in the center where visual recognition region is located
Solution Approach 1:
The invention applies local quality by positioning the spacer specifically in the non-visual recognition region (end portion) of the light guide plate. This localized placement maintains the necessary clearance in the visual recognition area through the spacer's presence at the end, preventing interference fringes where they would be most noticeable while avoiding visual recognition of the spacer itself.
3Volume of moving object
If light guide plates are made closer together to reduce overall device size, then the device becomes more compact, but interference fringes occur when plates contact or approach within occurrence distance
Solution Approach 1:
The spacer serves as an intermediary element that maintains a precise clearance between light guide plates, preventing direct contact and the occurrence of interference fringes. This allows the plates to be positioned close together for compactness while the spacer ensures the separation distance remains above the occurrence distance for interference fringe formation.
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
This configuration effectively prevents interference fringes from being visually recognized, even when the light guide plates are warped, while reducing manufacturing costs by integrating microprojections and microrecesses on the same surface, ensuring reliable display performance and cost savings.
Implementation Method 1
a plurality of microrecesses that emit light supplied within the light guide plate to outside
Implementation Method 2
the microprojection group having a height and an arrangement that ensure such a distance that interference fringes are not visually recognized
Data Source
AI summary
A first light guide plate and a second light guide plate are arranged facing each other. A microprojection group comprising a plurality of microprojections is arranged in the visual recognition region of the surface facing the first light guide plate in the second light guide plate. The plurality of microprojections have a height and arrangement that ensure a distance where interference fringes are not visually recognized between the first light guide plate and the second light guide plate in contact with the second light guide plate. The microprojection group and the dimples configuring a design part formed on the second light guide plate are formed on an identical surface.