Scanning Optical Device Translucent Films Ghosting Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing virtual image display apparatuses face challenges in miniaturization and weight reduction due to their configuration, which includes a liquid crystal display apparatus and a collimate optical system, making it difficult to achieve a lightweight and compact form for head-mounted display units.
Innovation Solution
The solution involves an image display apparatus with a scanning mechanism using mirrors and translucent films, which converts light from a source into parallel light without the need for a liquid crystal display apparatus or intermediate image formation, allowing for reduced size and weight by eliminating the need for a two-dimensional image formation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a liquid crystal display apparatus and collimate optical system are used to form a two-dimensional image, then image quality is improved, but device size and weight increase
Solution Approach 1:
The patent extracts and eliminates the liquid crystal display apparatus and collimate optical system from the traditional virtual image display configuration. Instead of forming a two-dimensional image through these heavy components, the invention uses a light source that directly emits light beams scanned by mirrors, removing the unnecessary image formation process and achieving weight reduction while maintaining display functionality
Solution Approach 2:
The patent inverts the conventional approach by not forming an intermediate two-dimensional image at all. Rather than creating an image and then displaying it, the system directly scans light beams to create the visual output, eliminating the intermediate image formation step and its associated heavy optical components
2Illumination intensity
If a liquid crystal display apparatus and collimate optical system are used to form a two-dimensional image, then image quality is improved, but device volume increases
Solution Approach 1:
The patent extracts and eliminates the liquid crystal display apparatus and collimate optical system from the traditional virtual image display configuration. Instead of forming a two-dimensional image through these heavy components, the invention uses a light source that directly emits light beams scanned by mirrors, removing the unnecessary image formation process and achieving volume reduction while maintaining display functionality
Solution Approach 2:
The patent inverts the conventional approach by not forming an intermediate two-dimensional image at all. Rather than creating an image and then displaying it, the system directly scans light beams to create the visual output, eliminating the intermediate image formation step and its associated bulky optical components
3Object-generated harmful factors
If translucent films with high light reflectivity are used to suppress ghosting, then ghosting is reduced, but light transmission is decreased
Solution Approach 1:
The patent applies parameter changes by optimizing the light reflectivity of translucent films to satisfy a specific mathematical relationship (R≤k×{(P/t)×tanζ}^1/2). This quantitative parameter control allows the system to suppress ghosting effects while maintaining adequate light transmission, resolving the contradiction between these two requirements through precise parameter optimization
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 enables a significant reduction in size and weight of the image display apparatus, suppressing ghosting effects by controlling light reflectivity, and allows for a more compact and lightweight head-mounted display unit.
Implementation Method 1
light from a light source incident to a light receiving face is reflected by a plurality of translucent films and emitted from a light emitting face
Data Source
AI summary
Disclosed herein is an image display apparatus, including: a light source; and a scanning section adapted to scan a light beam emitted from the light source; the scanning section including (a) a first mirror, (b) a first light deflection section, (c) a second mirror, and (d) a second light deflection section; the second light deflection section including an external light receiving face; the second light deflection section having a plurality of translucent films provided in the inside thereof; the translucent films having a light reflectivity R2 at a wavelength of the light beam which satisfies: R2≦k×{(P2/t2)×tan(ζ2)}1/2 where k is a constant higher 0 but lower than 1, P2 an array pitch of the translucent films, t2 a thickness of the second light deflection section, and ζ2 an angle formed between the light emitting face and the translucent films.