Rotatable 3D Light Valve for Light Spot Coverage in Stereoscopic Projection
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Solution Overview
Problem
The existing stereoscopic projection systems require large 3D light valves and are costly due to the need for a minimum area that accommodates the displacement range of light spots, which is (1+2K2)(1+2K1)LW, leading to increased size and cost.
Innovation Solution
A stereoscopic projection device with a 3D light valve rotationally installed on a lens assembly, allowing it to adjust and cover the current light spot range by rotational regulation, reducing the required area to (Max[(½+K2)L,(½+K1)W]+½L for square light valves or (1+2K2)L and (1+K1)W for rectangular light valves, depending on displacement coefficients K1 and K2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the 3D light valve area is increased to accommodate the displacement range of light spots, then the light spot coverage is improved, but the device size and cost increase
Solution Approach 1:
The patent applies the dynamics principle by making the 3D light valve rotatable instead of fixed. The light valve can rotate around the optical axis to dynamically adjust its position and cover different light spot ranges. This dynamic adjustment allows a smaller light valve area to accommodate the same light spot displacement range that would require a much larger fixed light valve area, thus resolving the contradiction between light spot coverage and device size.
2Adaptability or versatility
If the 3D light valve area is increased to accommodate the displacement range of light spots, then the light spot coverage is improved, but the device cost increases
Solution Approach 1:
The rotatable design of the 3D light valve enables a smaller light valve area to achieve the same light spot coverage as a larger fixed light valve. This reduces the amount of material and manufacturing complexity required, thereby lowering device cost while maintaining adequate light spot coverage capability.
3Area of stationary object
If the 3D light valve area is reduced, then the device size and cost decrease, but the light spot coverage is compromised
Solution Approach 1:
The patent resolves this contradiction by introducing rotational movement to the 3D light valve. The light valve rotates around the optical axis to track and cover light spots at different positions. This dynamic tracking capability allows a reduced light valve area to maintain adequate light spot coverage, as the light valve can be rotated to any necessary position rather than requiring a large fixed area to cover all possible positions simultaneously.
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 rotational adjustment of the 3D light valve reduces its area and weight, thereby decreasing the overall cost of the stereoscopic projection device while maintaining optical effectiveness.
Implementation Method 1
the light emitted by the projector is converted into left or right hand circularly polarized light for 3D projection after passing through a 3D light valve
Data Source
AI summary
A stereoscopic projection device is provided, including a projector including includes a lens assembly for emitting partially polarized light and polarization stereoscopic conversion equipment including a 3D light valve which is rotationally installed to a light-emitting side of the lens assembly and is parallel to the lens assembly, such that the partially polarized light passes through the 3D light valve to be converted into left hand circularly polarized light and right hand circularly polarized light. When the partially polarized light is subjected to light spot offset, the 3D light valve is rotationally regulated according to polarization characteristics of the partially polarized light and rotational symmetry of the light valve and has the same effect on the light polarization before and after being rotated, the 3D light valve is enabled to cover the current light spot range formed at the 3D light valve by the light emitted from the lens assembly.