Hybrid Projection Illumination Layout for Brightness-Cost Tradeoff
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Solution Overview
Problem
Conventional illumination systems face a trade-off between high luminous efficiency and low production cost, with laser units offering high efficiency but high cost, and LEDs providing low brightness and low cost, making it difficult to achieve both high brightness and affordable solutions.
Innovation Solution
A projection device and illumination system that combines light emitting diodes and laser units on a circuit board, with the laser and LED illumination ranges partially overlapping to enhance central illumination intensity while maintaining low peripheral intensity, using a wavelength conversion component to generate excitation beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If laser units are used as illumination light source, then luminous efficiency is improved, but production cost increases
Solution Approach 1:
The patent combines laser units and light emitting diodes into a single light source module where both components work together. The laser unit provides high luminous efficiency for the central area while the light emitting diode covers the peripheral area, achieving both high efficiency and cost-effectiveness through integration.
Solution Approach 2:
The patent applies different illumination sources to different regions: laser units are used for the central high-brightness area where high luminous efficiency is critical, while light emitting diodes are used for the peripheral areas where cost is more important. This local differentiation resolves the contradiction by optimizing each region according to its specific requirements.
2Ease of manufacture
If light emitting diodes are used as illumination light source, then production cost is reduced, but illumination intensity is insufficient
Solution Approach 1:
The patent merges laser units and light emitting diodes in a complementary arrangement where the laser unit provides high intensity illumination for the central area and the light emitting diode supplements the peripheral area. This combination achieves high overall illumination intensity while maintaining cost-effectiveness.
Solution Approach 2:
The patent applies laser units to the central area where high illumination intensity is most critical, and uses light emitting diodes for the peripheral areas. This local optimization ensures that the central area achieves high brightness requirements while the overall system remains cost-effective due to the use of cheaper LED components in less critical regions.
3Ease of manufacture
If multiple light emitting diodes are arranged as array, then production cost is reduced, but luminous efficiency is insufficient
Solution Approach 1:
The patent merges multiple light emitting diodes with laser units in a hybrid array configuration. The light emitting diodes are arranged to cover peripheral areas while the laser unit is positioned to illuminate the central area, creating a complementary illumination pattern that achieves both cost-effectiveness and high luminous efficiency.
Solution Approach 2:
The patent applies different components to different spatial locations: light emitting diodes are used in peripheral positions where cost is prioritized, while laser units are positioned centrally where luminous efficiency is most important. This spatial differentiation allows the system to achieve high overall luminous efficiency through the strategic placement of high-efficiency laser components in the most critical region.
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 achieves high luminous efficiency and low hardware cost by simultaneously or alternately activating LEDs and lasers, providing a rectangular light-emitting surface suitable for car headlights with adaptive brightness control.
Implementation Method 1
The wavelength conversion component allows penetration of some part of the illumination beam, and is excited by other part of the illumination beam to generate an excitation beam
Data Source
AI summary
A projection device is applied to an illumination system and includes a circuit board, a light source module and a wavelength conversion component. The light source module is disposed on the circuit board and adapted to emit an illumination beam. The light source module includes at least one light emitting diode and at least one laser unit arranged adjacent to each other. A total luminous of the light source module is ranged between 0.5 square millimeters and 10 square millimeters. The wavelength conversion component is disposed on the light source module. A laser illumination range of the laser unit is partly overlapped with a light emitting diode illumination range of the light emitting diode to increase an illumination intensity of a central area of the illumination beam, and an illumination intensity of a peripheral area of the illumination beam is lower than the illumination intensity of the central area.