Projector Light Exit Angle Adjustment for Curved Surfaces
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Solution Overview
Problem
Conventional projectors are unable to maintain focus on curved surfaces or project images at different depths, limiting their ability to project on non-flat surfaces effectively.
Innovation Solution
A projector with a light exit adjustment mechanism that controls the light exit angle and position of component light fluxes, allowing for simultaneous projection on areas at different depths by using a light selector to adjust the light transmission and emission from multiple self-luminous devices, which can form coherent light and be precisely directed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional projection optical system is used, then the projection structure is simple, but the projector cannot maintain focus on surfaces with varying depths
Solution Approach 1:
The light emitter is divided into multiple independent light-emitting units arranged in a matrix, each capable of emitting light flux with different exit angles. This segmentation allows different regions of the projection area at different depths to receive light flux from corresponding light-emitting units, enabling focus maintenance on surfaces with varying depths without requiring a complex adjustable projection optical system.
Solution Approach 2:
Different light-emitting units are configured with different light exit angles to match the local depth characteristics of different regions in the projection area. This local quality approach ensures that each region receives light flux optimized for its specific depth, maintaining focus across the entire projection area including curved surfaces without needing complex mechanical adjustments.
2Adaptability or versatility
If a planar display device with a fixed focal plane is used, then the device structure is simple, but simultaneous projection on areas at different depths is not possible
Solution Approach 1:
The system dynamically controls the light exit angles of different light-emitting units based on the depth characteristics of the projection area. By adjusting which light-emitting units are activated and at what angles, the system can adapt to different projection scenarios including flat surfaces, curved surfaces, and areas with varying depths, achieving high adaptability without requiring a physically complex light control mechanism.
Solution Approach 2:
The matrix arrangement of light-emitting units with controllable light exit angles creates a universal light emission system that can project onto various types of surfaces (flat, curved, multi-depth) using the same basic structure. This multi-functionality is achieved through software control of light emission patterns rather than through complex mechanical or optical components.
3Reliability
If light flux from multiple light emission points is controlled individually, then projection on depth-varying surfaces is enabled, but the device complexity increases
Solution Approach 1:
Each light-emitting unit in the matrix is configured to emit light flux with specific exit angles that correspond to its position in the matrix. This self-service configuration allows the system to automatically match light emission characteristics to the required projection areas without requiring complex external adjustment mechanisms. The light-emitting units essentially configure themselves to provide the necessary light control for maintaining focus on depth-varying surfaces.
Data Source
AI summary
A projector includes a light exit adjustment mechanism that adjusts (sets) a light exit angle to be used for each of component light fluxes IL that exit from self-luminous devices disposed in a plurality of positions in a light emitter and a circuit apparatus that is a light controller that controls a light exit position and the light exit angle of each of the component light fluxes IL that exit out of the light exit adjustment mechanism in accordance with a projection area PD that is irradiated with the component light fluxes IL having passed through the light exit adjustment mechanism. Under the control of the circuit apparatus, the light exit adjustment mechanism allows the component light fluxes that form image light to exit from a plurality of positions at angles different from each other to perform simultaneous or concurrent projection on the projection area.