Projector Depth Detection Masks Non-Target Areas
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Solution Overview
Problem
Existing projector technologies fail to prevent areas outside the desired projection surface from being emphasized, leading to unwanted emphasis of peripheries or illumination of individuals in the projection area.
Innovation Solution
A projector with a detection system that measures distances to a target area and adjusts the projection image state to mask areas beyond the target, either by preventing light projection or using a single color, thereby avoiding emphasis on non-target areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the projection image is projected on the entire projection surface, then the coverage area is increased, but the non-target areas are unintentionally emphasized
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different regions within the projection surface. The control section identifies target parts versus non-target parts and applies different projection states to each region. Specifically, the projection image is projected normally on target parts while masking or reducing projection on non-target parts, thereby achieving localized quality control that prevents unwanted emphasis on peripheral or unintended areas while maintaining full coverage capability.
2Illumination intensity
If the projection image includes peripheral areas, then the overall visibility is improved, but the target area contrast is reduced
Solution Approach 1:
The patent implements local quality by applying different projection intensities and masking strategies to different regions. The control section processes the projection image to maintain normal visibility and contrast on target parts while applying masking or reduced intensity to peripheral non-target parts. This localized differentiation ensures that overall visibility is preserved through complete coverage, while target area contrast is maintained through selective emphasis on designated regions.
3Area of stationary object
If light is projected on all areas of the projection surface, then the illumination coverage is increased, but individuals in the projection area are bedazzled
Solution Approach 1:
The patent applies local quality by spatially differentiating the projection output based on depth information. The control section uses depth data to identify regions where individuals are present and applies masking or reduced projection intensity specifically to those areas while maintaining normal projection on target surfaces. This localized control prevents glare and discomfort to individuals in the projection area while preserving comprehensive illumination coverage on intended surfaces.
Solution Approach 2:
The patent implements feedback by utilizing depth sensor information to dynamically adjust the projection output. The control section receives depth data about the environment and individuals in the projection area, processes this information to identify regions requiring masking, and adjusts the projection image accordingly in real-time. This feedback mechanism enables adaptive control that prevents glare to individuals while maintaining effective illumination coverage on target surfaces.
Data Source
AI summary
A projector includes a projection section adapted to project a projection image on a projection surface including a target part, a detection section adapted to detect a distance from a predetermined position to the target part, and a control section adapted to set an area to be projected on the projection surface other than the target part out of the projection image as a partial area based on the distance thus detected, and change a display state of the projection image so that the partial area set is masked.