Optical Scanning Projection Screen Coherent Light Guidance
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Solution Overview
Problem
Conventional projection video display apparatuses face challenges in reducing manufacturing costs, power consumption, miniaturization, weight, and design flexibility, particularly in environments where portability and low-cost solutions are required.
Innovation Solution
A projection video display apparatus with an optical scanning video projecting system that uses coherent light to project images from behind or in front of a semitransparent screen, eliminating the need for a housing and incorporating a freeform surface lens and mirror configuration for enhanced light efficiency and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional projection video display apparatus is used, then video display function is achieved, but manufacturing cost, power consumption, and apparatus size are excessive
Solution Approach 1:
The patent extracts and removes the housing structure from the projection video display apparatus, keeping only the essential functional components (projection unit and screen). This extraction eliminates unnecessary structural complexity and manufacturing costs while preserving the core video display function.
Solution Approach 2:
The patent employs a simple, minimalistic configuration without requiring durable housing or protective structures. The apparatus uses basic optical components and a simple support stand, reducing manufacturing complexity and cost while maintaining functionality.
2Use of energy by moving object
If a conventional projection video display apparatus is used, then video display function is achieved, but power consumption is high
Solution Approach 1:
The patent removes unnecessary components and structural elements that would consume power, keeping only the essential projection unit and screen. This minimalistic configuration reduces overall power consumption while maintaining video display functionality.
3Weight of moving object
If a conventional projection video display apparatus is used, then video display function is achieved, but apparatus size and weight are excessive
Solution Approach 1:
The patent extracts and removes the housing structure and other bulky components, retaining only the essential projection unit and screen. This extraction dramatically reduces apparatus weight and size while preserving the core video display function.
Solution Approach 2:
The patent divides the apparatus into separate functional components (projection unit, screen, and simple support stand), allowing for a compact configuration that minimizes overall apparatus size and weight.
4Adaptability or versatility
If a conventional projection video display apparatus is used, then video display function is achieved, but design flexibility and portability are limited
Solution Approach 1:
The patent removes the fixed housing structure that limits design flexibility and portability. By keeping only the essential projection unit and screen with a simple support stand, the apparatus can be easily transported and adapted to different usage environments.
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 enables low-cost, portable, and energy-efficient video display with improved image quality and design flexibility, allowing for ultra-low power consumption and weight reduction while maintaining high brightness and linearity.
Implementation Method 1
the video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light on the video projection screen, the video light being composed of coherent light
Implementation Method 2
a video projection screen arranged in an indoor space in a state where both surfaces of the video projection screen are exposed to the indoor space, both surfaces including a rear surface and a front surface, the video projection screen being configured to transmit video light to display video on the front surface
Implementation Method 3
the video projection screen is configured to guide the video light composed of the coherent light from the video projecting apparatus toward a direction to the front surface of the video projection screen
Data Source
AI summary
A projection video display apparatus includes: a video projection screen, having a front and a rear surface, arranged in an indoor space. The video projection screen transmits video light from behind the rear surface or in front of the front surface to display video on the front surface. The front surface functions as a video display surface. A video projecting apparatus, arranged in a side of the rear surface or the front surface, enlarges and projects the video light from the rear or front surface. The video projecting apparatus is configured by an optical scanning video projecting apparatus that forms the video by scanning video light composed of coherent light on the video projection screen. The video projection screen guides the video light from the video projecting apparatus toward a direction to the front surface, and causes part of the light in the indoor space to be transmitted therethrough.