Modular Projection Lens Assembly for Varying Display Sizes
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Solution Overview
Problem
Conventional projection lens systems for large-size image display apparatuses face challenges in efficient assembly and manufacturing due to the need for customized lens blocks with precise dimensions and surface accuracy, leading to increased costs and complexity.
Innovation Solution
A method for assembling a projection lens in an oblique projection optical system by dividing the lens into blocks, including spherical and aspherical lenses, which can be interchangeably combined based on image display element sizes, allowing for efficient manufacturing and adjustment of light beams according to lens specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If single lenses are divided into multiple blocks with customized dimensions for different image display element sizes, then the lens can be adapted to various applications, but the design and assembly costs increase significantly
Solution Approach 1:
The patent applies universality by designing a standardized lens block structure that can serve multiple functions across different applications. The lens block includes a standardized mounting structure and optical path arrangement that allows the same basic design to accommodate different image display element sizes by simply changing the lens diameter, rather than redesigning the entire lens assembly for each application.
Solution Approach 2:
The patent segments the lens system into modular lens blocks that can be independently designed and assembled. The lens block is divided into distinct components including the lens element, mounting structure, and optical path elements, allowing for standardized manufacturing of individual modules that can be combined in different configurations for different applications.
2Manufacturing precision
If lens blocks are customized for each image display element size, then optical performance can be optimized, but manufacturing costs increase
Solution Approach 1:
The patent applies parameter changes by maintaining a standardized lens block design while varying only critical parameters such as lens diameter and focal length to match different image display element sizes. This approach allows for optimized optical performance for each application while avoiding the costly redesign of entire lens blocks, as only specific parameters need to be adjusted rather than the complete structure.
Solution Approach 2:
The standardized lens block design serves multiple applications with different image display element sizes, reducing the total number of unique lens blocks that need to be manufactured. This universality approach lowers manufacturing costs by reusing the same standardized components across different applications while still achieving optimized optical performance through parameter adjustments.
3Ease of operation
If the projection lens is divided into multiple lens blocks, then assembly flexibility is improved, but the number of components and assembly steps increase
Solution Approach 1:
The patent segments the lens system into a manageable number of standardized lens blocks that can be independently manufactured and assembled. This segmentation provides assembly flexibility by allowing different combinations of lens blocks to be used for different applications, while the standardized nature of each block reduces the complexity of assembly procedures compared to custom-designed lens assemblies.
Solution Approach 2:
The standardized lens blocks can be universally applied across different projection systems with varying image display element sizes. This universality reduces the number of different component types that need to be managed and assembled, as the same standardized blocks can serve multiple functions, thereby reducing overall assembly complexity despite the modular approach.
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
This approach enables efficient and cost-effective manufacturing of projection lenses with desired optical performance, reducing assembly and manufacturing costs while maintaining surface accuracy and roughness, even with varying image display element sizes.
Implementation Method 1
a projection lens through which modulated image light from the image display element is obliquely projected onto a projection surface
Data Source
AI summary
Provided is a projection lens assembly method in an oblique projection optical system, which enables efficient manufacture even if a size of an image display element to be mounted varies, and a projection type image display apparatus using the projection lens. The projection lens assembly method in the oblique projection optical system for an oblique type projection image display apparatus including a block of a spherical lens and a block of an aspherical lens includes: preparing in advance the block of the spherical lens having a size that adapts to image display elements having different sizes and incorporated in the projection image display apparatus, and the block of a common aspherical lens; and assembling the block of the spherical lens selected in accordance with the sizes of the incorporated image display elements and the block of the common aspherical lens to assemble the projection lens.