Projection Display Interchangeable Lens Mounting
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Solution Overview
Problem
Existing projection type image display apparatuses do not adequately account for the replacement of imaging lenses based on the focal length of projection lenses, leading to suboptimal performance across different projection distances.
Innovation Solution
A projection type image display apparatus is designed with interchangeable projection and imaging lenses, allowing for the selection and mounting of suitable lenses based on the focal length of the projection lens, along with identification systems to ensure correct combinations and optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed imaging lens is used in the projector, then the device structure is simple, but the imaging performance is suboptimal when used with projection lenses of different focal lengths
Solution Approach 1:
The patent implements a replaceable imaging lens system that allows dynamic adaptation to different projection lens focal lengths. The imaging lens can be exchanged based on the projection lens being used, enabling the system to optimize imaging performance for each specific configuration rather than relying on a fixed lens design.
Solution Approach 2:
The patent changes the focal length parameter of the imaging lens to match different projection lens requirements. By selecting imaging lenses with appropriate focal lengths corresponding to short, standard, and long focal length projection lenses, the system optimizes the overall imaging performance for each projection scenario.
2Reliability
If multiple imaging lenses are provided for different projection distances, then the imaging quality is optimized, but the device complexity increases
Solution Approach 1:
The patent divides the imaging lens system into multiple discrete lens modules, each optimized for specific projection distance scenarios. This segmentation allows the user to select and exchange only the necessary lens for each application, rather than integrating all lens types into a single complex system.
Solution Approach 2:
The replaceable imaging lens system provides multi-functionality by enabling the same projector body to work optimally with different projection lens types. The universal mounting interface and selection mechanism allow a single device to adapt to various imaging requirements through lens exchange.
Data Source
AI summary
An object of the present invention is to provide a projection type image display apparatus in which an imaging lens can be replaced according to a focal length of a projection lens. In order to achieve the above object, a projection type image display apparatus includes: a light source; a lighting optical system configured to guide light from the light source to a display element; a projection lens mounting portion in which a projection lens configured to project the light transmitting through or being reflected by the display element is mountable, and that is configured to allow one replaceable projection lens of a plurality of replaceable projection lenses to be selectively mounted in the projection type image display apparatus; and an imaging lens mounting portion configured to allow one imaging lens of a plurality of replaceable imaging lenses to be selectively mounted in the projection type image display apparatus.