3D Cinema Projection Using Beam Splitter Mirrors
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Solution Overview
Problem
Existing 3D image cinema systems require a taller interior space due to the need for separate left and right image projection, making installation in standard buildings with lower ceilings impractical and increasing construction costs.
Innovation Solution
A 3D image cinema system with a projection room using semi-transparent mirrors and two-sided surface reflection mirrors to project 3D images in both forward and rearward directions, allowing for symmetrical screen arrangements and stepped seating, enabling image division and projection on two screens with enhanced brightness and viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate left and right image projection is used for 3D images, then 3D viewing capability is achieved, but the interior space height must be doubled compared to general buildings
Solution Approach 1:
The patent combines the projection of left and right images into a single projection path using a beam splitter (semi-transparent mirror). The beam splitter divides the projected light into two separate paths - one for the left image and one for the right image - allowing both 3D images to be projected simultaneously without requiring separate projection rooms or increased ceiling height.
Solution Approach 2:
The beam splitter acts as an intermediary optical element that receives the projected light and redirects it into two separate paths. This intermediary component enables the separation of left and right images without requiring physical separation of the projection systems, thereby eliminating the need for doubled interior space height.
2Ease of operation
If chair arrangement height is increased in a stepped manner to provide adequate viewing angles, then viewing quality is improved, but the inner space height requirement increases to greater than 6 meters
Solution Approach 1:
The patent introduces a vertical dimension to the viewing arrangement by positioning screens at different heights (front screen at upper position, rear screen at lower position). This vertical arrangement allows viewers to see both screens from a single seating position without requiring stepped chair arrangements, thereby reducing the inner space height requirement while maintaining adequate viewing angles.
3Adaptability or versatility
If traditional 3D projection systems are installed in existing residential and commercial buildings, then theater facilities can be added, but the building ceiling height (2-5 meters) is insufficient
Solution Approach 1:
The patent merges the projection paths of left and right images into a single optical path using a beam splitter. This consolidation allows the system to fit within standard building ceiling heights by eliminating the need for separate, vertically stacked projection systems that would require doubled ceiling space.
Solution Approach 2:
The system utilizes vertical space efficiently by positioning the front screen at a higher location and the rear screen at a lower location. This vertical arrangement allows both screens to be viewed from a single seating level, adapting the traditional horizontal theater layout to a vertical configuration that fits within standard ceiling heights.
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 installation of 3D image cinema systems in buildings with standard ceiling heights, providing wider viewing angles and reducing construction costs by allowing for flexible theater configurations without the need for specialized spaces.
Implementation Method 1
a semi-transparent mirror, a two-sided surface reflection mirror and a polarization plate between a left image projector and a right image projector to project separately the 3D image in front and rear directions
Implementation Method 2
a semi-transparent mirror, a two-sided surface reflection mirror and a polarization plate between a left image projector and a right image projector to project separately the 3D image in front and rear directions
Implementation Method 3
the semi-transparent mirror and a reflection mirror are provide at an inclination angle in a front surface of the projector for projecting separately the 3D image in an opposing direction
Data Source
AI summary
A 3D image cinema system having at least one projection room for viewing 3D images or 2D images is divided into forward and rearward viewing directions for the projection of an image on a front screen and a rear screen which are provided in a front end and a rear end of the projection room, respectively. Further, a front direction chair and a rear direction chair having a different viewing direction are provided on a front step and a rear step between the projection room and the front and rear screens where the theater can be easily installed in a general building and the 3D and 2D image has as much as 1.5-2 times wider viewing as a prior image.