Imaging System Using Polarization Filters and Shutter for Screen Projection
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Solution Overview
Problem
Current imaging systems for projected images on screens suffer from low image quality due to reflection and absorption of light, leading to mixed projected and outside light, resulting in degraded image quality during recording or distribution.
Innovation Solution
An image system comprising a projector, a screen, and an imager with filters to prevent transmission of the projected image, including a shutter function for intermittent projection and polarization filters to enhance image quality, and a synthesizer to combine high-quality images, with the screen being at least partially metal or coated with metal powder paint for improved polarization retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a projector projects an image on a screen for live performance, then the live atmosphere is provided to audience, but the projected image quality is degraded due to light reflection and absorption
Solution Approach 1:
The imaging process is segmented into multiple channels: one for capturing the live performance scene and another for capturing the projected image separately. The imager alternates between capturing the screen area and the projector output, allowing high-quality projected image capture without degrading the live performance brightness.
Solution Approach 2:
A beam splitter or dichroic mirror is introduced as an intermediary optical element to separate the projected light path from the imaging path. This allows the imager to capture the projected image directly from the projector output rather than through the screen reflection, eliminating the quality degradation caused by screen reflection and absorption.
2Loss of information
If the imager shoots through the screen to capture the projected image, then the projected image is captured, but outside light and reflected light mix with the projected image
Solution Approach 1:
The imager performs periodic switching between two imaging modes: capturing the screen area during live performance and capturing the projector output for the projected image. This periodic action allows selective capture of projected image information without contamination from outside light reflecting off the screen.
Solution Approach 2:
The projected image information is extracted directly from the projector output path rather than being captured through the screen. By taking the projected image signal directly from the projector, the system eliminates the mixing of outside light and reflected light that occurs when imaging through the screen.
3Object-affected harmful factors
If a filter is placed on the imager to block projected light, then outside light can be captured, but the projected image cannot be captured simultaneously
Solution Approach 1:
The imager uses periodic switching to alternate between capturing scenes with the filter active (blocking projected light) and capturing projected images without the filter. This allows both functions to be performed at different times, with the system synthesizing the final output by combining these alternating captures.
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 high-quality image capture and synthesis of projected images without low-quality projections, maintaining the live atmosphere and providing clear, high-quality images for distribution.
Implementation Method 1
an imager capable of shooting an area, including the screen through a filter preventing transmission of the image displayed on the screen
Implementation Method 2
the image projected on the screen is polarized under a first condition, and the filter of the imager is a second filter unit, that allows only transmission of polarization under a second condition, not under the first condition
Implementation Method 3
the screen is at least partially metal or is coated with metal powder paint
Data Source
AI summary
Since an image projected from a projector has basically not high quality due to degradation of brightness and mixture of outside light, the image shot by the conventional technology includes the projected image with basically not high quality. In order to solve the above deficiency, in an aspect of the present invention provides an image system, where live performance is provided to audience by image projection on the screen, and the image to be shot does not include the projected image with low quality. For example, the image system can later synthesize a high-quality image having the same content as the projected image.