Compact Projection Apparatus Using Integrated LED and Fly-Eye Lens
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Solution Overview
Problem
Conventional DLP micro projectors are bulky due to their complex illumination optical systems requiring multiple light sources and collimator modules, making them large and heavy, which hinders their portability and high-quality projection capabilities.
Innovation Solution
A projection apparatus is designed with a light supply device using an LED lamp capable of emitting red, green, and blue light, combined with a collimator fly-eye lens to collimate light, an optical path conversion device, a DMD device for processing light, and a projection lens device, which reduces the size and weight by eliminating the need for separate color light sources and collimator mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light sources and collimator modules are used in conventional DLP micro projectors, then projection quality is maintained, but device size and weight increase
Solution Approach 1:
The patent combines multiple light sources (red, green, blue LEDs) into a single integrated LED lamp assembly, merging their illumination functions. The collimator fly-eye lens integrates the collimation function for all three color lights into a single optical component, eliminating the need for separate collimator modules for each light source. This merging reduces the number of components, thereby reducing overall device weight while maintaining projection quality.
Solution Approach 2:
The single LED lamp assembly serves multiple functions by emitting red, green, and blue light simultaneously, replacing what would traditionally require three separate light sources. The collimator fly-eye lens performs the collimation function for all color lights at once, making it a universal optical component that handles multiple wavelengths. This multi-functionality reduces component count and weight while preserving the required projection performance.
2Reliability
If multiple light sources and collimator modules are used in conventional DLP micro projectors, then projection quality is maintained, but device volume increases
Solution Approach 1:
The patent merges multiple light sources into a single LED lamp assembly and combines multiple collimator modules into one collimator fly-eye lens. This consolidation significantly reduces the volume occupied by the illumination optical system, allowing the overall micro projector to be more compact while maintaining the necessary projection quality through the integrated design.
Solution Approach 2:
The single LED lamp provides illumination for multiple colors simultaneously, and the collimator fly-eye lens handles collimation for all colors in a single pass. This multi-functional approach eliminates the need for separate optical paths and components for each color, thereby reducing the overall device volume while preserving projection quality.
3Reliability
If separate color light sources and collimator mechanisms are used, then optical performance is ensured, but device complexity increases
Solution Approach 1:
The patent combines separate color light sources into a single multi-color LED lamp assembly, reducing the number of individual light source components. It merges separate collimator mechanisms into a single collimator fly-eye lens that handles all colors. This merging dramatically simplifies the illumination optical system's structure while maintaining optical performance through proper optical design of the integrated components.
Solution Approach 2:
The single LED lamp assembly serves as a universal light source for red, green, and blue lights, eliminating the need for separate color light source components. The collimator fly-eye lens acts as a universal collimator for all wavelengths. This multi-functionality reduces component count and simplifies the overall optical system architecture while ensuring optical performance is maintained through careful optical design.
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 effectively reduces the volume and weight of the projection apparatus, enhancing portability and projection quality by collimating light from a single LED lamp and streamlining the optical path, while maintaining high image projection capabilities.
Implementation Method 1
the collimator fly-eye lens is capable of collimating the light ray emitted by each of the lamp bodies
Implementation Method 2
an optical path conversion device, configured to convert a direction of the light rays emitted by the light supply device
Implementation Method 3
an optical path conversion device, configured to convert a direction of the light rays emitted by the light supply device
Implementation Method 4
a DMD device, configured to process the light rays from the optical path conversion device and feed the processed light rays to the optical path conversion device
Data Source
AI summary
The present disclosure provides a projection apparatus. The projection apparatus includes: a light supply device, including an LED lamp and a collimator fly-eye lens, wherein lamp bodies of the LED lamp are arrayed and the LED lamp is capable of simultaneously emitting red, green, and blue light rays, and the collimator fly-eye lens is capable of collimating the light ray emitted by each of the lamp bodies; an optical path conversion device, configured to convert a direction of the light rays emitted by the light supply device; a DMD device, configured to process the light rays from the optical path conversion device and feed the processed light rays to the optical path conversion device; and a projection lens device; wherein the light rays transmitted by the optical path conversion device to the projection lens device to achieve image projection.