Head-Mounted Display Optical System with Micro Mirror Relay
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Solution Overview
Problem
Current head-mounted displays are excessively bulky and suffer from high energy loss due to the use of beam splitters in their optical components, necessitating a reduction in size and improvement in energy efficiency.
Innovation Solution
A display apparatus comprising left and right eye blocks with micro mirror units, relay units, and eyepiece units, which utilize a combination of optical lenses to enlarge and converge light beams, reducing size and energy loss by eliminating split beam losses and optimizing lens configurations to minimize optical aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a beam splitter is used in the optical component of a head mounted display, then the display can be implemented with conventional optical design, but the device becomes excessively bulky and suffers from high energy loss due to split beam losses
Solution Approach 1:
The patent removes the beam splitter from the optical system entirely. Instead of using a beam splitter to divide light paths, the design extracts only the necessary optical components (lenses and mirrors) to achieve image relay and display, eliminating the source of split beam losses and reducing energy waste.
Solution Approach 2:
The optical system is segmented into distinct functional units: a display unit with micro mirrors, a relay unit with multiple lenses for image enlargement, and an eyepiece unit with additional lenses for focusing. This segmentation allows each component to perform its specific function efficiently without the need for energy-lossy beam splitting.
2Volume of moving object
If conventional optical components with beam splitters are used, then the display apparatus can be designed with standard configurations, but the overall size becomes excessively bulky
Solution Approach 1:
The optical components are arranged in a nested configuration where the relay unit lenses are positioned within the space defined by the display unit and eyepiece unit. The multiple lenses in the relay unit are nested along the optical path, allowing compact arrangement that reduces overall device volume while maintaining manufacturing feasibility.
3Use of energy by moving object
If beam splitters are used to create stereoscopic images, then the optical path can be divided for left and right eyes, but energy is lost through split beam losses
Solution Approach 1:
The patent merges the optical paths for left and right eyes into a single display unit with micro mirrors that can direct light to different eyes. Instead of using separate beam splitters for each eye, the micro mirror array consolidates the function of creating stereoscopic images, improving energy efficiency by eliminating redundant beam splitting while maintaining the complexity of the micro mirror control system.
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 solution enables a more compact and energy-efficient display apparatus with reduced optical aberration, effectively addressing the bulkiness and energy loss issues of existing head-mounted displays.
Implementation Method 1
receive light beams of an input image and generate a relay image by enlarging the input image through the at least one first optical lens
Implementation Method 2
receive light beams of the relay image and generate an output image by converging the light beams of the relay image through the at least one second optical lens
Data Source
AI summary
A display apparatus and a display method are disclosed. The display apparatus includes a left eye block and a right eye block. Each of the left eye and right eye block includes a relay unit and an eyepiece unit. Relay unit including at least one first optical lens is configured to receive light beams of input image, and generate a relay image by enlarging input image through the at least one first optical lens. The eyepiece unit including at least one second optical lens is configured to receive light beams of relay image, and generate an output image for a user to see by converging light beams of relay image through the at least one second optical lens.