Compact Laser Element With Longitudinal Pin Arrangement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current laser elements are too large for size reduction in applications like miniature projectors, and existing designs with multiple light emitting elements face challenges in achieving compact size while maintaining separate control over laser beams of different wavelengths, leading to issues with speckle noise due to high coherency.
Innovation Solution
A laser element design featuring a terminal member with strategically arranged pins and a base configuration that allows for the mounting of multiple light emitting points, enabling separate control of laser beams and reducing the overall size by optimizing pin arrangement and base shape, such as circular, D-cut, or I-cut shapes, to accommodate multiple laser chips with varying wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple light emitting elements are mounted on a heat block with multiple pins for separate control, then separate control of laser beams of different wavelengths is achieved, but the size of the laser element increases making it difficult to achieve 3.8 mm diameter
Solution Approach 1:
Multiple light emitting elements (laser chips) are mounted on a single heat block with a unified base structure, merging multiple functions into one compact unit. The base integrates multiple pins for separate control while maintaining a compact 3.8 mm diameter overall size, resolving the contradiction between separate control capability and size reduction.
Solution Approach 2:
The base is designed with a circular cross-section (3.8 mm diameter) and extended length, utilizing the longitudinal dimension to accommodate multiple pins and light emitting elements arranged along the length rather than spreading them out radially, enabling separate control within a constrained diameter.
2Ease of manufacture
If five connection terminals (pins) are provided for mounting multiple light emitting elements, then electrical connection and control are enabled, but the pins interfere with each other and increase the required size
Solution Approach 1:
Instead of arranging pins in a planar configuration that causes interference, the pins are distributed along the longitudinal axis of the extended base, utilizing the length dimension to spatially separate pin locations and eliminate interference while maintaining compact diameter.
3Adaptability or versatility
If a typical laser element of 5.6 mm diameter is used, then sufficient space is available for mounting and wiring, but the size is too large for miniature displays requiring several centimeters square modules
Solution Approach 1:
The base transitions from a short wide configuration (5.6 mm diameter) to an extended longitudinal configuration (3.8 mm diameter × extended length), shifting the available space from radial to longitudinal dimension, enabling adequate mounting and wiring space within a reduced diameter suitable for miniature displays.
Data Source
AI summary
A laser element includes a light emitting portion that has at least two or more light emitting points, and a terminal member on which the light emitting portion is mounted. The terminal member includes a base portion that has a mounting surface on which the light emitting portion is mounted, a base that has a front surface where the base portion is provided substantially at a center, and four pins that extend from a rear surface of the base. The light emitting portion is positioned in a range surrounded by the four pins as viewed from the front surface of the base.