Optical Engine Base Rigidity for Projection Video Positioning
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Solution Overview
Problem
Conventional projection video display devices face issues with positional accuracy of optical components due to deformation of the light guide, which affects video quality when external forces are applied, leading to luminance unevenness and color shifts.
Innovation Solution
The optical engine and projection optical system are fixed to a common base with high rigidity, which is attached to the device case, rather than being directly fixed to the case, thereby maintaining positional accuracy and preventing deformation-induced quality deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light guide is fixed directly to the case, then the structure is simple, but positional accuracy of optical components deteriorates when external force is applied
Solution Approach 1:
A rigid plate is introduced as an intermediary component between the case and the light guide. The rigid plate is fixed to the case, and the light guide is fixed to the rigid plate, rather than directly to the case. This intermediary structure isolates the optical components from direct case deformation, maintaining positional accuracy while preserving structural simplicity.
2Ease of manufacture
If the light guide is made of synthetic resin material, then ease of manufacture is improved, but strength and deformation resistance deteriorate
Solution Approach 1:
The rigid plate serves as a mediator that bears the mechanical load and provides structural strength, while the light guide maintained its synthetic resin material for ease of manufacture. The rigid plate compensates for the low strength of synthetic resin materials, allowing the light guide to remain easy to manufacture while the overall assembly achieves high strength and deformation resistance.
3Adaptability or versatility
If the light guide has a complicated internal structure, then adaptability to component shapes is improved, but deformation under external force increases
Solution Approach 1:
The rigid plate acts as a stable intermediary that provides deformation resistance and structural stability. The light guide can maintain its complicated internal structure for adaptability to various component shapes, while the rigid plate prevents this complexity from translating into deformation under external force, isolating the adaptability function from the stability function.
Data Source
AI summary
Provided is a projection video display device with which precision of location of each component of the optical engine and the projection optical assembly is maintained and display video quality not impaired even if exterior force is sustained. A projection video display device comprises an optical engine (2) which projects light which is emitted from a light source (21) upon a liquid-crystal panel (231) and forms a video, and a projection optical assembly (3) which projects an enlargement of the video which is emitted from the optical engine (2). The projection optical assembly (3) and the optical engine (2) are configured to be anchored to a common base (4) which retains these in an integrated manner, with the common base (4) being attached to the casing of the device.