Curved Reflector Illumination System for Miniaturized Projection Devices
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Solution Overview
Problem
The challenge is to reduce the size of projection devices while maintaining the uniformity of the illumination light beam, as simply reducing the number of elements in the illumination system leads to poor imaging effects.
Innovation Solution
An illumination system comprising a light source module, a lens module, and a curved reflector, where the ratio of the effective focal length of the curved reflector to the lens module falls within 1 to 3, ensuring efficient energy use and improved light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the number of elements in the illumination system is reduced to decrease system size, then the device complexity and volume are reduced, but the uniformity of the illumination light beam deteriorates
Solution Approach 1:
The patent introduces a curved reflector with a specifically designed curved surface to replace traditional flat or simple optical elements. The curved surface shape is optimized to redirect light rays and achieve uniform illumination distribution across the light beam, thereby maintaining illumination quality while reducing the overall number of optical elements in the system.
Solution Approach 2:
The patent optimizes key parameters including the focal length of the lens module, the curvature radius of the curved reflector, and the relative positioning between optical elements. By carefully adjusting these parameters, the system achieves uniform illumination with fewer components, resolving the contradiction between system miniaturization and illumination uniformity.
2Loss of energy
If the number of elements in the illumination system is reduced to improve energy efficiency, then the energy loss is reduced, but the imaging effect deteriorates
Solution Approach 1:
The curved reflector with optimized curvature effectively collects and redirects light energy that would otherwise be lost, improving energy utilization efficiency. Simultaneously, the precise design of the curved surface ensures proper light distribution to maintain acceptable imaging quality, thus resolving the contradiction between energy efficiency and imaging effect.
Solution Approach 2:
The curved reflector serves multiple functions: it acts as a light collector, a light redistributor for uniformity, and a space-saving element that reduces the number of separate optical components. This multi-functionality allows the system to maintain imaging quality while improving energy efficiency and reducing component count.
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
This configuration results in a miniaturized projection device with enhanced energy efficiency and improved imaging effects by reducing the number of elements and maintaining light uniformity, meeting basic usage requirements.
Implementation Method 1
The light beam is emitted sequentially from the light source module, passes through the lens module, and is reflected by the curved reflector to form the illumination light beam
Implementation Method 2
The light beam is emitted sequentially from the light source module, passes through the lens module, and is reflected by the curved reflector to form the illumination light beam
Data Source
AI summary
Disclosed is an illumination system configured to provide an illumination light beam. The illumination system includes a light source module, a lens module, and a curved reflector. The light source module is configured to generate a light beam. The lens module is disposed on a transmission path of the light beam. The curved reflector is disposed on the transmission path of the light beam. The light beam is emitted sequentially from the light source module, passes through the lens module, and is reflected by the curved reflector to form the illumination light beam. A ratio between an effective focal length of the curved reflector and an effective focal length of the lens module falls within a range of 1 to 3. A projection device is also provided.