Lamp Diaphragm Light Collimation Efficiency
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Solution Overview
Problem
Existing decorative lighting solutions face challenges in achieving high collimation and central light intensity while maintaining a compact design, and they often suffer from low light collection efficiency and excessive light path length, which affects the lighting effect and practicality.
Innovation Solution
A lamp design incorporating a laser diode, a wavelength conversion plate with a transparent thermally conductive substrate, and a light collimation element that focuses and collimates light, using a diaphragm to block diffused light and optimize light transmission, resulting in a highly collimated and intense beam with reduced light path length through the use of mirrors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a laser diode and wavelength conversion plate are used to create a small light spot, then light collimation efficiency is improved, but the light path length increases and device complexity increases
Solution Approach 1:
The patent introduces a diaphragm with a light transmitting region that is positioned at a specific distance from the wavelength conversion plate. This diaphragm blocks diffused light in the radial direction while allowing collimated light to pass through, effectively filtering light in a dimensional space and shortening the functional light path without compromising collimation efficiency.
Solution Approach 2:
The diaphragm extracts and blocks the harmful diffused light ring surrounding the light spot, separating the useful collimated light from the harmful scattered light. This extraction of the light path allows the system to achieve high collimation efficiency without requiring an excessively long light path to naturally filter out scattered light.
2Illumination intensity
If a diaphragm is added to block diffused light, then light beam quality is improved, but device complexity increases
Solution Approach 1:
The diaphragm is designed with a light transmitting region that has specific dimensional parameters, where at least one point on the edge of the light transmitting region is at a distance from the center of the light spot that is less than a characteristic distance L. This localized precision design allows the diaphragm to block only the necessary diffused light while maintaining high transmission of useful light, achieving improved central light intensity with minimal added complexity.
3Productivity
If the light transmitting region of the diaphragm is positioned close to the excitation area, then light spread is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines a characteristic distance L that provides a quantitative criterion for positioning the diaphragm relative to the wavelength conversion plate. By establishing this specific distance parameter, the design transforms a qualitative positioning requirement into a quantifiable manufacturing specification, making it easier to achieve the desired light collimation efficiency while managing manufacturing precision requirements.
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 achieves a highly collimated and intense light beam with improved light collection efficiency, reducing light spread and enhancing decorative lighting effects, such as creating a 'stars in the sky' effect, while maintaining a compact and efficient optical path.
Implementation Method 1
a light source, wherein the light source includes a laser diode and a wavelength conversion plate. The laser light emitted by the laser diode is focused on the wavelength conversion plate and excites the wavelength conversion plate to emit converted light
Implementation Method 2
The laser light emitted by the laser diode is focused on the wavelength conversion plate and excites the wavelength conversion plate to emit converted light
Implementation Method 3
The laser emitted by the laser diode passes through the transparent thermally conductive substrate and is focused on the wavelength conversion coating
Implementation Method 4
a wavelength conversion plate with a transparent thermally conductive substrate
Implementation Method 5
The surface of the transparent thermally conductive substrate is coated with an optical film that transmits laser light and at least partially reflects converted light
Implementation Method 6
a light collimation element for receiving and collimating light emitted from the diaphragm
Implementation Method 7
The diaphragm could at least partially block the diffused light ring around the light spot
Data Source
AI summary
A lamp is provided that includes a light source (119), having a laser diode (111, 511, 911) and a fluorescent sheet (112). The laser (121, 521, 621, 721, 921) emitted from the laser diode (111, 511, 911) is focused on the fluorescent sheet (112) and excites the fluorescent sheet (112) to emit fluorescent light (123, 323). The fluorescent sheet (112) has a transparent thermally conductive substrate (512a, 612a, 712a, 912a, 1012a) and a fluorescent coating (512b, 612b, 712b, 912b, 1012b) attached to the substrate, and has a diaphragm plate (717) disposed at a rear end of an optical path of the fluorescent sheet (112) and attached to the fluorescent sheet (112), the diaphragm plate (717) having a light-transmitting zone (717a) and a light-shading zone (717b) closely adjacent to each other. The diaphragm plate (717) can at least partially block light around a light-emission spot.