Light Guide Plate Assembly with Integrated Adhesive for Light Leakage Prevention
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Solution Overview
Problem
Conventional electronic devices with multiple light-emitting sources face challenges in maintaining light blocking effects due to miniaturization, which narrows the attachment region of double-sided tapes between light guide plates and the housing, leading to potential detachment and light leakage.
Innovation Solution
The design incorporates a second light guide plate with a main-body plate portion that superposes on the first light guide plate, with a double-sided tape attaching the main-body plate portion to the housing, and a light-blocking member to prevent light leakage, increasing the attachment area and maintaining the light blocking effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the housing is miniaturized to reduce device size, then the overall device dimensions are reduced, but the attachment region of the double-sided tape becomes narrower
Solution Approach 1:
The patent combines the attachment functions for both light guide plates into a single double-sided tape. The first light guide plate and second light guide plate are attached to the housing simultaneously through one integrated adhesive member, maximizing the use of available attachment space in the miniaturized housing structure.
Solution Approach 2:
The double-sided tape extends in the width direction of the housing to compensate for the reduced attachment area in the length direction. By utilizing the width dimension more effectively, the total attachment region area is maintained despite housing miniaturization.
2Ease of operation
If separate double-sided tapes are used for each light guide plate, then each plate can be independently attached, but the total attachment region becomes insufficient in miniaturized housings
Solution Approach 1:
Instead of using separate double-sided tapes for the first and second light guide plates, the patent employs a single integrated double-sided tape that attaches both plates to the housing. This merging approach consolidates the attachment function while maximizing the utilization of the limited attachment region area in miniaturized housings.
3Productivity
If the attachment region is narrowed due to miniaturization, then more space is available for other components, but the double-sided tape may come off causing light leakage
Solution Approach 1:
The patent merges the attachment of both light guide plates into a single double-sided tape structure, which distributes the attachment load across a strategically designed region. This integrated approach enhances attachment reliability by preventing tape detachment that would cause light leakage, while still accommodating the space constraints of miniaturized housings.
Solution Approach 2:
The double-sided tape is positioned and dimensioned to provide enhanced attachment reliability at critical locations. The tape extends in the width direction to ensure adequate attachment area is dedicated to securing the light guide plates, maintaining local attachment quality even when the overall housing size is reduced.
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 light leakage by securing a larger attachment area for the adhesive member and enhancing the light blocking effect, even in miniaturized housings.
Implementation Method 1
a first adhesive member that is inserted between the second light guide plate and the housing and attaches the main-body plate portion to the housing
Implementation Method 2
guides light of the first light-emitting source from the first projection to the first hole
Implementation Method 3
guides light of the second light-emitting source from the second projection to the second hole
Implementation Method 4
blocks out the light of the first light-emitting source with the main-body plate portion
Data Source
AI summary
An electronic device includes a housing, a first light guide plate, a second light guide plate, and a first adhesive member. A first hole in position to a first light-emitting source and a second hole in position to a second light-emitting source are formed on the housing. The first light guide plate has a first projection to be inserted into the first hole. The second light guide plate has a main-body plate portion to be superposed on the first light guide plate with the first projection penetrating therethrough and a second projection to be inserted into the second hole. The second light guide plate blocks out the light of the first light-emitting source with the main-body plate portion. The first adhesive member is inserted between the second light guide plate and the housing, and attaches the main-body plate portion to the housing.