Light-Emitting Device Cover With Deformable Projected Portion
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Solution Overview
Problem
Existing light-emitting and illumination devices have a significant thickness that limits their compactness and versatility in applications, particularly in mobile devices where space is a constraint.
Innovation Solution
A light-emitting device design featuring a substrate with a light-emitting element, a light-transmissive member, and a cover with a deformable projected portion that securely engages with a counterpart member, allowing for a reduced thickness configuration and enhanced fixation, along with a manufacturing method that includes forming a cover with a recess and sidewall structure using light-transmissive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional cover structure is used, then the device provides adequate protection and light transmission, but the device thickness is significant
Solution Approach 1:
The patent applies this principle by creating a thin cover structure made of light-transmissive material that maintains adequate protection and light transmission while significantly reducing device thickness. The cover includes a recess that receives the light-emitting element and a projected portion for engagement.
Solution Approach 2:
The patent applies this principle by nesting the light-emitting element within the recess of the cover structure. The cover's recess is configured to receive and hold the light-emitting element, creating a compact integrated assembly that reduces overall device thickness while maintaining structural integrity.
2Length of moving object
If the cover thickness is reduced, then the device becomes more compact, but the fixation strength with the counterpart member may be insufficient
Solution Approach 1:
The patent applies this principle by transitioning from a planar cover design to a three-dimensional structure with a projected portion that extends outward. This projected portion engages with a corresponding recess in the counterpart member, creating mechanical interlocking that provides strong fixation despite the reduced overall thickness of the cover.
Solution Approach 2:
The patent applies this principle by designing the projected portion to be deformable under pressing force. When the cover is pressed against the counterpart member, the projected portion deforms to create a secure mechanical engagement, providing strong fixation strength while maintaining a thin profile.
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 a substantial reduction in device thickness while maintaining effective light emission and fixation strength, making these devices more suitable for compact applications such as mobile phone flashlights.
Implementation Method 1
The projected portion is formed of a material that is deformable due to a pressing force generated in the event of an engagement with a counterpart member
Implementation Method 2
a light-transmissive member disposed on a light extraction surface of the light-emitting element
Implementation Method 3
an upper portion that is transmissive to light coming from the light-emitting element
Data Source
AI summary
A light-emitting device includes: a substrate; a light-emitting element disposed on the substrate; a light-transmissive member disposed on a light extraction surface of the light-emitting element; and a cover that covers the light-emitting element with a gap between the cover and the light-emitting element, the cover including: an upper portion that is transmissive to light coming from the light-emitting element, a sidewall extending along a peripheral edge of the upper portion and having an outer lateral surface on which a projected portion is formed, and a recess defined by the upper portion and the sidewall. The projected portion is formed of a material that is deformable due to a pressing force generated in the event of an engagement with a counterpart member.