Total Reflection Prism Near-Eye Display for Large Field of View
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current near-eye display systems struggle to achieve a large field of view angle while maintaining a compact and slim design, due to the need for a large-aperture imaging system which increases the axial thickness of the device.
Innovation Solution
The use of a total reflection prism to conduct one or more times of total reflection on light emitted by an image source, combined with a near-eye dioptric component for image amplification, allows for a large field of view angle to be achieved in a compact volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large-aperture imaging system is used to achieve a large field of view angle, then the field of view angle is improved, but the axial thickness of the device increases
Solution Approach 1:
The patent uses a total reflection prism to fold the optical path, changing the light propagation from a straight axial path to a reflected path that extends laterally. This allows the optical system to achieve a large effective aperture and field of view angle without increasing the axial thickness, as the light is redirected through reflection rather than linear propagation.
Solution Approach 2:
The total reflection prism acts as an intermediary component that mediates between the image source and the near-eye dioptric component. It extends the light propagation path and enables the optical system to achieve large aperture effects while maintaining a compact axial profile through the prism's reflective surfaces.
2Area of stationary object
If the focal length of the imaging system is increased to achieve large aperture, then the field of view angle is improved, but the device becomes less compact
Solution Approach 1:
By using the total reflection prism to fold the optical path in a different spatial dimension, the system achieves an extended effective focal length and aperture without proportionally increasing the overall device volume. The reflected optical path allows compact packaging of the optical components.
Solution Approach 2:
The patent integrates the total reflection prism within the compact near-eye display device structure, nesting the optical path folding mechanism within the overall device volume. This allows the extended optical path to be contained within a compact form factor suitable for wearable applications.
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 solution enables a compact near-eye display device to provide a large field of view angle, enhancing user experience while maintaining a slim and portable form factor.
Implementation Method 1
the total reflection prism is used to conduct one or more times of total reflection on the light emitted by the image source, so as to extend the light propagation path
Implementation Method 2
finally, the near-eye dioptric component is used for image amplification
Data Source
AI summary
Disclosed is a total reflection based compact near-eye display device with a large field of view. Light rays emitted by an image source (103) are transmitted by using a total reflection prism (101), and are finally subjected to image magnification by means of a near-eye dioptric component (105), such that a near-eye display effect with a large field of view is achieved under the conditions of a compact volume. A gap layer exists between the near-eye dioptric component and the total reflection prism, and the gap layer contains substances with a refractive index lower than that of the total reflection prism.