Laser Projection System Using Rotating Lens Disk
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Solution Overview
Problem
Current LCD projectors are heavy and bulky, making them impractical for portable use, as they cannot be miniaturized to fit in a pocket or briefcase while maintaining functionality for projecting presentations.
Innovation Solution
A light beam delivery system utilizing a rotating disk of lenses, synchronized with pulsed and colored light beams from a computer or television, to project images onto a surface, with a compact design that includes a USB connector, batteries, and adjustable legs for stability and angle adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LCD projectors are used to project presentations, then image projection capability is achieved, but the device becomes heavy and bulky
Solution Approach 1:
The patent replaces the traditional LCD projection system with a laser-based light source and digital micromirror device (DMD) system. This substitution eliminates the need for bulky LCD panels and high-wattage bulbs, achieving compact form factor while maintaining projection capability. The laser diodes generate coherent light that is modulated by the DMD to create the projected image, fundamentally changing the mechanical architecture of the projector.
Solution Approach 2:
The patent changes key parameters of the projection system: using low-power laser diodes instead of high-wattage bulbs, employing a DMD with microscopically small mirrors instead of LCD panels, and utilizing digital signal processing instead of analog optical pathways. These parameter changes enable the projector to be miniaturized to pocket size while maintaining functional performance.
2Reliability
If LCD projectors are used to project presentations, then image projection capability is achieved, but the device occupies large volume
Solution Approach 1:
The patent employs a nested architecture where the DMD chip with its array of microscopic mirrors is integrated onto a compact substrate, which is then housed within a small enclosure containing the laser diodes and optical components. The adjustable legs and USB connector are integrated into the compact body, creating a nested structure that minimizes overall volume while maintaining all necessary functions.
Solution Approach 2:
The patent transitions from two-dimensional LCD panels to a three-dimensional DMD structure where microscopic mirrors are arranged in a spatial array that can be precisely controlled. This dimensional change allows for more efficient use of space and enables the projection of high-resolution images from a much smaller volume.
3Reliability
If traditional projection methods are used, then image projection is achieved, but portability is compromised
Solution Approach 1:
The patent creates a universal projection device that can connect to multiple sources (computers via USB, other devices) and project to various surfaces (walls, screens, ceilings using adjustable legs). The compact design with rechargeable batteries enables the device to function independently without requiring external power sources, achieving true portability while maintaining versatile projection capabilities.
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
Enables the projection of high-resolution images in a lightweight, portable device that can be easily carried, allowing for flexible presentation delivery without the need for heavy equipment.
Implementation Method 1
a rotating disk where the rotating disk contains a multitude of lenses, such that the lenses are aligned to direct the beam of light across the surface
Implementation Method 2
A laser projection system includes a housing, a motor, a rotating lens assembly mounted on the motor, a lens array on the rotating lens assembly, a laser assembly in the housing, and a controller in the housing
Data Source
AI summary
A device for projecting images from a video generating device such as a computer, television receiver, or similar device onto a screen or other surface is described in this invention. The device uses a rotating disk containing numerous lenses to direct a light beam from a laser or other light source towards the screen. In one embodiment, a pulsed laser light from red, green, and blue lasers are combined into a single light pulse that is transmitted through the rotating disk that transmit each light pulse to a specific location on the screen.