Projector Level Difference Correction Mechanism
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Solution Overview
Problem
Projection display devices face challenges in reducing the distance between the projector and screen while maintaining image quality and avoiding increased costs and mechanical issues due to the need for wide-angle lenses and level differences in the projector body.
Innovation Solution
A projection display device with a projection lens section, a mirror section, and a level difference correction mechanism that adjusts the orientation of the light to ensure smooth projection without creating dead spaces or oblique surfaces, using an arm member and adjusting screws to correct level differences and fine-tune the projection direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the projection lens section and mirror section are shifted to promote a wider angle of projection light, then the projection distance is shortened, but a level difference is created on the side surface of the main body cabinet causing the projector to be oblique to the horizontal direction
Solution Approach 1:
The patent introduces a level difference correction section that adds a corrective dimension to the optical path. By inserting this intermediate section between the projection lens and mirror, the system compensates for the level difference created by shifting components, allowing the projector body to remain level while maintaining the shortened projection distance achieved through component shifting.
Solution Approach 2:
The level difference correction section acts as an intermediary element between the projection lens section and the mirror section. This mediator component corrects the optical path deviation caused by shifting the projection components, enabling the projector to maintain a level orientation on the placement plane while achieving shorter projection distance through component repositioning.
2Length of moving object
If a wide-angle lens with large view angle is used to achieve oblique projection without distortion, then the projection distance is shortened, but increased costs due to large-sized lens and large-sized projector body occur
Solution Approach 1:
The patent segments the projection optical system into distinct functional sections: a projection lens section with a first view angle and a mirror section with a second view angle. This segmentation allows each component to be optimized independently, using standard-sized lenses rather than requiring a single large wide-angle lens, thereby reducing costs and projector body size while achieving the desired oblique projection with shortened distance.
3Adaptability or versatility
If the mirror is shifted to promote wider angle of projection light, then the projection angle is increased, but dead space is created in the main body cabinet making the projector large-sized
Solution Approach 1:
The patent employs adjustable support structures including adjusting screws that allow dynamic positioning of the mirror section. This dynamic adjustment capability enables the mirror to be shifted to achieve wider projection angles while maintaining compact cabinet dimensions, as the system can be precisely configured rather than requiring excessive fixed space for maximum angle adjustment.
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 a compact projector design with improved light orientation and reduced mechanical stress, allowing for efficient projection without distortion and increased service life of the light source, while maintaining a compact and level surface.
Implementation Method 1
a projection lens section to which light modulated by a light modulating element is entered
Implementation Method 2
a mirror section for reflecting the light emitted from the projection lens section to a projection plane
Data Source
AI summary
A projection display device comprises a main body cabinet, a projection lens section to which light modulated by a light modulating element entered, and a mirror section for reflecting the light emitted from the projection lens section to a projection plane. A level difference depending on an arrangement shift of the projection lens section and the mirror section is formed on a second side surface facing a first side surface having light projection port of the main body cabinet. Furthermore, the projection display device comprises a level difference correction section for directing the light from the mirror section in a desired direction by correcting the level difference, when the main body cabinet is planed on a plane to be placed, the second side surface facing the plane to be placed.