Non-coaxial Optical Component Reduces HMD Module Thickness
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Solution Overview
Problem
Existing head-mounted display devices face challenges in achieving a compact design due to the thickness of the display device module, which affects user comfort and practicality.
Innovation Solution
The implementation of a display device module that includes a display panel, a non-coaxial optical component, a first optical element, and a second optical element, where the non-coaxial optical component has an incident surface facing the display panel, and the first and second optical elements are configured to reflect and transmit light in a way that reduces the module's thickness by eliminating the need for additional compensation prisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional optical design with compensation prisms is used, then external scene imaging can be corrected, but the display device module thickness increases
Solution Approach 1:
The patent extracts and eliminates the compensation prism from the optical system by using a non-coaxial optical component with specifically designed reflective surfaces that inherently correct imaging distortion without requiring additional corrective elements, thereby reducing module thickness while maintaining imaging accuracy
Solution Approach 2:
The patent transitions from a coaxial optical path to a non-coaxial optical path by introducing optical elements at specific angles, changing the dimensional arrangement of the optical system to achieve both thinness and imaging correction simultaneously
2Length of stationary object
If the display device module thickness is reduced for compact design, then user comfort improves, but optical path design becomes more difficult
Solution Approach 1:
The patent merges the functions of light reflection, optical path folding, and imaging correction into a single non-coaxial optical component with multiple reflective surfaces, simplifying the overall optical design while achieving the desired thin profile
Solution Approach 2:
The patent optimizes specific parameters such as the angles of reflective surfaces and the relative positions of optical elements to achieve the desired optical performance in a compact configuration, transforming the design space to accommodate thinness requirements
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 design reduces the thickness of the display device module, enabling a more compact head-mounted display device that minimizes pressure on the user's head and enhances user experience without distorting external scene imaging.
Implementation Method 1
the non-coaxial optical component includes an incident surface and an emergent surface, and the incident surface of the non-coaxial optical component faces the display panel, so that light emitted by the display panel is capable of being transmitted through the incident surface and transmitted from the emergent surface
Implementation Method 2
the first optical element is configured to reflect, to the second optical element, the light transmitted from the emergent surface, where an included angle is provided between the first optical element and the second optical element
Implementation Method 3
the second optical element is configured to reflect, back to the first optical element, the light reflected by the first optical element, so that the light is transmitted from the first optical element
Data Source
AI summary
Embodiments of this application provide a display device module, including a display panel, a non-coaxial optical component, a first optical element, and a second optical element. The non-coaxial optical component includes an incident surface and an emergent surface, and the incident surface of the non-coaxial optical component faces the display panel, so that light emitted by the display panel is capable of being transmitted through the incident surface and transmitted from the emergent surface. In this application, a thickness of a display module in a head-mounted display device in a viewing direction of human eyes is reduced, and a compact design of the head-mounted display device is implemented.