Light Guide Plate Stray Light Shielding for Display Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display apparatuses face challenges in preventing unwanted images from being visually recognized by observers and others, with stray light components causing ghost images and deteriorating image quality.
Innovation Solution
A display apparatus featuring a light guide plate with a light-shielding portion integrated within, positioned between the light incident surface and reflection surfaces, which shields stray light components and prevents them from reaching the observer, while maintaining the optical path for intended image light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a light guide plate with reflection surface is used to guide image light to the observer, then image display function is achieved, but stray light components cause unwanted images to be visually recognized
Solution Approach 1:
The light-shielding portion is extracted as a separate functional element within the light guide plate to specifically address stray light. This component is positioned at locations where stray light components may be generated or reflected, such as behind reflection surfaces or at interfaces, to selectively remove harmful stray light while preserving the main image light path
Solution Approach 2:
The light-shielding portion is applied locally at specific positions within the light guide plate rather than uniformly throughout. It is strategically placed at interfaces, behind reflection surfaces, or at regions where stray light generation is most likely, allowing selective shielding of stray light paths while maintaining optical transparency in the main light transmission areas
2Object-affected harmful factors
If light-shielding portion is added to shield stray light, then unwanted images are prevented, but device complexity increases
Solution Approach 1:
The light-shielding portion is merged with the light guide plate structure, forming an integrated component rather than a separate accessory. This integration allows the light-shielding function to be incorporated into the existing light guide plate manufacturing process, reducing overall device complexity while maintaining effective stray light prevention
Solution Approach 2:
The light-shielding portion serves multiple functions: it shields stray light from reaching the observer, prevents unwanted image formation, and can be integrated into the existing light guide plate structure. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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
Effectively prevents unwanted images from being seen by observers and others, enhancing image quality by shielding stray light components without obstructing the intended image light path, thus improving the overall display performance.
Implementation Method 1
at least one light-shielding portion that is provided in the light guide plate main body and shields a stray light component of the image light
Implementation Method 2
at least one reflection surface that is provided inside the light guide plate main body and reflects the image light via the optical surface group to a side of the eyeball
Implementation Method 3
a first optical surface that totally internally reflects the image light via the light incident surface
Data Source
AI summary
To provide a display apparatus capable of preventing unwanted images from being visually recognized by an observer and others. A display apparatus according to the present technology includes: an image light generation apparatus that generates image light; and a light guide plate that guides the image light from the image light generation apparatus to an eyeball, in which the light guide plate includes a light guide plate main body including a light incident surface upon which the image light enters, and an optical surface group including a plurality of optical surfaces that guides the image light via the light incident surface, at least one reflection surface that is provided inside the light guide plate main body and reflects the image light via the optical surface group to a side of the eyeball, and at least one light-shielding portion that is provided in the light guide plate main body and shields a stray light component of the image light. In accordance with a display apparatus according to the present technology, a display apparatus capable of preventing unwanted images from being visually recognized by an observer and other people can be provided.