VR Display Optical Path Using Peripheral Angle Expansion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices for virtual reality applications face challenges in providing a high-resolution image with a wide angle of view while maintaining image quality and reducing eye strain.
Innovation Solution
A display device configuration that includes a light source, a first optical system, a MEMS mirror, and an angle changing element, which converts divergent light beams into collimated beams and changes the light beam's direction more significantly in the peripheral section than the central section, allowing for a high-resolution image with a wide angle of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light is scanned by MEMS and directly projected on the retina, then high resolution can be achieved, but the angle of view remains narrow
Solution Approach 1:
The patent applies local quality by using different optical path configurations for different regions of the display. The first optical path (for the first region) and second optical path (for the second region) are designed with different characteristics, allowing the central region to maintain high resolution while the peripheral region expands the angle of view. This regional differentiation resolves the contradiction between resolution and viewing angle.
Solution Approach 2:
The display is segmented into multiple regions with different optical characteristics. By dividing the display area into a first region and second region, each with dedicated optical paths, the system can optimize resolution for the central region while expanding the angle of view for the peripheral region, thus resolving the technical contradiction.
2Manufacturing precision
If the optical system is designed for high resolution, then image quality improves, but the configuration becomes complex
Solution Approach 1:
The patent uses a single light source that serves multiple functions by generating light beams for both the first optical path and second optical path. This multi-functional approach reduces the number of separate light sources needed, simplifying the overall optical system configuration while maintaining high resolution capabilities.
Solution Approach 2:
The patent merges multiple optical paths into a unified system where a single light source feeds both the first and second optical paths. By combining these paths and using shared components where possible, the system achieves high resolution without proportionally increasing complexity.
3Manufacturing precision
If multiple light sources are used for different regions, then image quality improves, but the device becomes more expensive
Solution Approach 1:
The single light source is designed to perform multiple functions by generating light beams for different optical paths and regions. This eliminates the need for separate light sources for the first and second regions, reducing manufacturing costs while maintaining high image quality through differentiated optical path design.
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 the display of high-quality images with a wide angle of view, maintaining high resolution in both central and peripheral regions, reducing eye strain, and allowing for a compact and cost-effective design.
Implementation Method 1
a first optical system which converts the light beam emitted from the light source into a collimated light beam
Implementation Method 2
a first mirror which reflects the light beam coming through the first optical system while rotating around a first axis
Implementation Method 3
The changing element has a central section and a peripheral section outside the central section. The peripheral section possesses higher positive refracting power than positive refracting power of an inner section
Implementation Method 4
a second optical system which deflects the light beam coming through the changing element
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Display device (100) includes light source (111), first optical system (121), first mirror (131), changing element (132), and second optical system (133). Light source (111) emits a light beam. First optical system (121) converts the light beam emitted from the light source (111) into a collimated light beam. First mirror (131) reflects the light beam coming through the first optical system (121) while rotating around a first axis. Changing element (132) changes a traveling direction of the light beam reflected by the first mirror (131). Changing element (132) has a central section and a peripheral section outside the central section. Second optical system (133) deflects the light beam coming through the changing element (132). Changing element (132) changes the traveling direction of the light beam such that an angle of the light beam in the traveling direction which has been reflected by first mirror (131) is changed more greatly in the peripheral section than in the central section.