Pixelated Luminous Screen Heat Sink for Laser Lighting
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Solution Overview
Problem
Existing lighting systems using lasers struggle to produce inhomogeneous light beams with desired shapes and luminance variations, which are essential for applications like automotive lighting, projection systems, and camera flashlights.
Innovation Solution
A lighting system comprising a laser and a pixelated luminous screen with a heat sink made from thermally conductive material, where the heat sink contacts the side edges of luminous pixels to dissipate heat and enhance heat management, allowing for the creation of inhomogeneous light beams with varied luminance and color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pixelated luminous screen is used to generate high-resolution light beams, then the light resolution and customization capability are improved, but heat accumulation in the luminous pixels increases
Solution Approach 1:
The luminous screen is divided into multiple discrete luminous pixels arranged in a grid pattern. Each pixel is separated by non-luminous material, creating isolated heat generation zones. This segmentation allows heat to be contained within individual pixels rather than accumulating across the entire screen, while still maintaining high-resolution light output through the collective action of all pixels.
Solution Approach 2:
Non-luminous material is introduced between adjacent luminous pixels to serve as a thermal barrier and optical separator. This intermediary material prevents heat transfer between neighboring pixels and allows independent thermal management of each luminous element, solving the heat accumulation problem while preserving the pixelated light generation capability.
2Illumination intensity
If high power laser light is used to illuminate the luminous screen, then the luminance output is improved, but heat damage to the luminous screen increases
Solution Approach 1:
The luminous screen is divided into multiple discrete luminous pixels arranged in a grid pattern. Each pixel is separated by non-luminous material, creating isolated heat generation zones. This segmentation allows heat to be contained within individual pixels rather than accumulating across the entire screen, while still maintaining high-resolution light output through the collective action of all pixels.
Solution Approach 2:
Different regions of the luminous screen have different properties: luminous pixels convert light to other wavelengths while non-luminous regions provide thermal isolation and structural support. This local differentiation allows the screen to withstand high power laser illumination by distributing thermal stress across multiple isolated zones rather than concentrating it uniformly.
3Shape
If multiple images or light beams are superimposed to create inhomogeneous light distribution, then the light beam shape control is improved, but the system complexity increases
Solution Approach 1:
The luminous screen is divided into multiple discrete luminous pixels arranged in a grid pattern. Each pixel can be independently controlled to emit or not emit light, allowing direct programming of complex light beam shapes and luminance distributions without requiring multiple physical light sources or complex optical path manipulations.
Solution Approach 2:
The light beam characteristics (shape, luminance distribution, color) can be dynamically changed by controlling which pixels are activated and at what intensity levels. This dynamic control capability replaces static optical systems with multiple fixed light sources, reducing system complexity while maintaining flexibility.
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 system effectively generates high-resolution, inhomogeneous light beams with improved heat management, suitable for applications requiring high luminance and customizable light patterns, such as automotive lighting and projection systems.
Implementation Method 1
a heat sink formed from thermally conductive material, the heat sink being positioned between the plurality of luminous pixels such that it contacts the adjacent side edges of the pixels
Implementation Method 2
a pixelated luminous screen for emitting light when excited by incident light
Data Source
AI summary
Proposed is a lighting system comprising: at least one laser adapted to output light; a pixelated luminous screen for emitting light when excited by incident light; and at least one optical component adapted to redirect and distribute light from the at least one laser to the pixelated luminous screen. The pixelated luminous screen comprises: a plurality of luminous pixels arranged adjacent each other with separated side edges, each pixel comprising luminous material; and a heat sink formed from thermally conductive material. The heat sink is positioned between the plurality of luminous pixels such that it contacts the adjacent side edges of the pixels.