Projection Optical System Alignment for Super-Wide-Angle Displays
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Solution Overview
Problem
There is a need for an image display apparatus and projection optical system that can achieve high-quality image display, particularly in super-wide-angle projection scenarios where existing technologies struggle to maintain image quality and alignment of pixel light directions.
Innovation Solution
The image display apparatus includes a light source, an image generator, and a projection optical system comprising a lens system and a reflection optical system. The lens system refracts pixel light, and the reflection optical system aligns the traveling directions of pixel light, using curved reflecting surfaces to ensure precise alignment and high-quality image projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a super-wide-angle projection optical system is used to perform large-screen display on a small projection space, then the projection capability is improved, but the alignment precision of pixel light directions deteriorates
Solution Approach 1:
The projection optical system is divided into multiple optical components including a lens system and a reflection optical system with multiple reflecting surfaces. This segmentation allows each component to be optimized for its specific function, with the lens system handling light convergence and the reflection optical system handling light direction alignment, thereby maintaining high alignment precision despite the super-wide-angle projection capability
Solution Approach 2:
The patent introduces a reflection optical system that operates in a different spatial dimension (using oblique incidence at wide angles up to 85 degrees or more) to correct the alignment of pixel light directions. By utilizing the reflection dimension with rotationally asymmetric surfaces, the system can align light rays in super-wide-angle projection without compromising precision
2Ease of operation
If display shifting is performed by moving optical components, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent incorporates a drive mechanism that enables dynamic movement of optical components (such as the lens system or reflection optical system) along the optical axis or laterally. This dynamic capability allows display shifting to be performed by simply moving selected optical components, improving ease of operation while the modular design keeps the complexity manageable
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 configuration allows for high-quality image display with a standard deviation of pixel light direction distribution less than 0.16, enabling efficient alignment and maintaining image quality even in super-wide-angle projections, thus addressing the challenges of existing technologies.
Implementation Method 1
The lens system refracts a plurality of pieces of pixel light included in the generated image light, and emits the plurality of pieces of refracted pixel light
Implementation Method 2
The plurality of pieces of pixel light emitted from the lens system is reflected off the reflection optical system to be headed for an onto-projection object in a state in which traveling directions of the plurality of pieces of pixel light are aligned
Data Source
AI summary
An image display apparatus according to an embodiment of the present technology includes a light source, an image generator, and a projection optical system. The image generator modulates light emitted by the light source to generate image light that includes a plurality of pieces of pixel light. The projection optical system includes a lens system and a reflection optical system. The lens system is formed along a reference axis at a position at which the generated image light enters the lens system. The lens system refracts the plurality of pieces of pixel light included in the generated image light, and emits the plurality of pieces of refracted pixel light. The reflection optical system is formed along the reference axis. The plurality of pieces of pixel light emitted from the lens system is reflected off the reflection optical system to be headed for an onto-projection object in a state in which traveling directions of the plurality of pieces of pixel light are aligned, the onto-projection object being an object onto which projection is performed.