Light Source Module Circuit Layout for High-Power Heat Dissipation
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Solution Overview
Problem
Existing technologies face challenges in efficiently dissipating heat generated by the driver circuit of integrated circuits used to drive surface-emitting laser devices in light source modules.
Innovation Solution
A light source module design that includes a field-effect transistor (FET) and charge storage units on a substrate, with specific terminal couplings and electrical potentials, to enhance heat dissipation and enable high-power, high-speed light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power light emission is achieved using integrated circuit driver circuits, then light output power and speed are improved, but heat generation increases making efficient heat dissipation difficult
Solution Approach 1:
The patent divides the driver circuit into multiple independent integrated circuits, each responsible for driving a specific light-emitting element. This segmentation allows heat to be distributed across multiple separate IC packages rather than concentrated in a single circuit, improving heat dissipation efficiency while maintaining high-power light output capability
Solution Approach 2:
The patent introduces a substrate as an intermediary thermal management structure between the light-emitting elements and the housing. The substrate provides dedicated heat dissipation pathways that conduct heat away from the IC packages and light-emitting elements, enabling high-power operation without excessive temperature rise
2Device complexity
If multiple surface-emitting laser devices are driven by a single integrated circuit, then device complexity is reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent segments the driver functionality across multiple IC packages, with each IC independently driving one or more light-emitting elements. This segmentation maintains relatively simple individual circuit designs while distributing thermal loads, achieving a balance between circuit simplicity and heat dissipation efficiency
Solution Approach 2:
The patent assigns different functional responsibilities to different IC packages and their corresponding light-emitting elements, allowing each local region to be optimized for its specific function while maintaining overall system simplicity. This local optimization enables efficient heat management without requiring complex centralized control
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 design allows for stable, high-power, and high-speed light output while effectively managing heat, enabling applications such as distance sensing using a time-of-flight method.
Implementation Method 1
a field-effect transistor disposed on the first substrate, the field-effect transistor having a third terminal and a fourth terminal
Implementation Method 2
a charge storage unit disposed on the first substrate, the charge storage unit having a fifth terminal and a sixth terminal
Implementation Method 3
a light source disposed on the first substrate to emit light, the light source having a first terminal and a second terminal
Data Source
AI summary
A light source module, a distance-measuring apparatus, and a mobile object. The light source module includes a first substrate, a light source disposed on the first substrate to emit light, the light source having a first terminal and a second terminal, a field-effect transistor disposed on the first substrate, the field-effect transistor having a third terminal and a fourth terminal, and a charge storage unit disposed on the first substrate, the charge storage unit having a fifth terminal and a sixth terminal. In the light source module, the first terminal and the sixth terminal are coupled to each other, the second terminal and the third terminal are coupled to each other. In the light source module, the fourth terminal and the fifth terminal are at an equivalent electrical potential. The distance-measuring apparatus includes the light source module. The includes the distance-measuring apparatus.