Lens Alignment via Projecting Support in Light Emitting Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light emitting devices face challenges in accurately aligning a lens with the light emitting device, leading to misalignment and reduced quality of emitted light.
Innovation Solution
A light emitting device design featuring a molded material with a projecting support that allows for precise alignment of a lens, using a sliding surface and surface-contact supporting surfaces to ensure accurate positioning, and a lens with an inner and outer surface configuration that connects to the projecting support, ensuring consistent light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a lens is bonded to a printed circuit board using a conventional method, then the lens can be attached to the board, but the lens cannot be accurately aligned with the light emitting device
Solution Approach 1:
The projecting support is formed on the printed circuit board before the lens is attached. This preliminary structure provides a predetermined positioning surface that guides the lens into accurate alignment with the light emitting device during the bonding process, eliminating the need for complex alignment procedures afterward.
Solution Approach 2:
The projecting support acts as an intermediary element between the printed circuit board and the lens. It provides a standardized interface with a positioning surface that ensures accurate lens placement without requiring direct complex interactions between the board and lens, thereby simplifying the overall bonding structure.
2Manufacturing precision
If the lens is bonded without a positioning structure, then the bonding process is simpler, but the lens alignment with the light emitting device is inaccurate
Solution Approach 1:
The projecting support is pre-formed on the printed circuit board, creating a built-in positioning mechanism. This allows the lens to be accurately positioned during bonding without requiring additional complex alignment tools or procedures, maintaining ease of manufacture while achieving high positioning accuracy.
Solution Approach 2:
The projecting support structure is designed to automatically guide the lens into the correct position during the bonding process. The positioning surface and sliding surface work together to self-align the lens with the light emitting device, eliminating the need for external alignment assistance.
3Manufacturing precision
If a projecting support with sliding surface is used, then lens alignment accuracy is improved, but the manufacturing complexity of the support structure increases
Solution Approach 1:
The sliding surface is pre-formed on the projecting support during board fabrication. This preliminary feature guides the lens into accurate alignment as it is bonded to the board, achieving high precision without requiring complex adjustable mechanisms or post-bonding alignment procedures.
Data Source
AI summary
A light emitting device capable of bonding a lens at a preset accurate position, and a backlight unit comprising the same are provided. The light emitting device includes a molded material having an opening through which light generated from a light emitting element disposed in the molded material is emitted, a projecting support disposed along at least part of a circumference of the opening of the molded material, and a lens having an inner surface that defines an internal surface on which light emitted from the light emitting element is incident, an outer surface that defines an external surface from which the incident light is emitted to the outside, and a bottom surface that connects the inner surface and the outer surface, wherein a boundary between the inner surface and the bottom surface, a lower part of the inner surface, or the bottom surface contacts the projecting support.