Beam Splitter Absorber Layout for Stray Light in Display Optics
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Solution Overview
Problem
Existing VR and AR devices suffer from non-imaging light, also known as stray light, which degrades the display quality of the imaged image.
Innovation Solution
A display device with an optical imaging apparatus that includes an absorbing element with a specific shape and arrangement to absorb non-imaging light without blocking imaging light, comprising an image source element, a beam splitting element, and a reflective element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an absorbing element is added to reduce non-imaging light, then display quality is improved, but device complexity increases
Solution Approach 1:
An absorbing element is introduced as an intermediary component between the image source element and the beam splitting element. This absorbing element specifically targets and absorbs non-imaging light (stray light) without interfering with the imaging light path, thereby improving display quality while maintaining a relatively simple structural addition
Solution Approach 2:
The absorbing element is designed with specific local properties: it is positioned and shaped to selectively absorb only non-imaging light in specific regions where stray light occurs, while allowing imaging light to pass through unaffected. This localized approach improves display quality without requiring complex system-wide modifications
2Reliability
If the absorbing element is positioned to absorb non-imaging light, then display quality is improved, but imaging light may be blocked
Solution Approach 1:
The absorbing element is designed with specific local properties: it is positioned and shaped to selectively absorb only non-imaging light in specific regions where stray light occurs, while allowing imaging light to pass through unaffected. This localized approach ensures that the absorbing element targets harmful stray light without interfering with the useful imaging light path
Solution Approach 2:
The absorbing element converts the harmful effect of stray light into a beneficial outcome by selectively absorbing only the non-imaging light components. The element is designed to transform the harmful stray light into absorbed energy while leaving the beneficial imaging light intact, thereby improving display quality without blocking the desired light path
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
The absorbing element effectively reduces non-imaging light, thereby improving the display quality of the displayed scene by minimizing its influence on the imaging light.
Implementation Method 1
an absorbing element, a shape of the absorbing element and an arrangement position of the absorbing element in the display device cause the absorbing element to absorb non-imaging light
Implementation Method 2
light emitted by the image source element is reflected to the reflective element through the beam splitting element
Implementation Method 3
the reflective element reflects light to the beam splitting element, and the beam splitting element transmits light
Data Source
AI summary
The present disclosure provides a display device, the display device includes an optical imaging apparatus including an image source element, a beam splitting element, and a reflective element configured to be aligned on light path; and an absorbing element, a shape of the absorbing element and an arrangement position of the absorbing element in the display device cause the absorbing element to absorb non-imaging light in a scene to be displayed, and not block imaging light for generating a display image of the scene to be displayed. In the display device, the absorbing element absorbs the non-imaging light in the scene to be displayed and reduces the non-imaging light in the display device, in turn reduces influence of the non-imaging light on the scene to be displayed and improves display quality of the display image of the scene to be displayed.