Optical Assembly for Compact VR Imaging

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Solution Overview

Problem

It is challenging to display high-resolution VR images on small-sized display screens used in wearable VR devices due to size constraints.

Innovation Solution

An optical assembly comprising a light-transmitting device, a light-converging device, and a light-reflecting device is used to converge and reflect light from left-eye and right-eye display images, reducing the image size while maintaining high resolution, utilizing optical components like optical prisms, lenses, and mirrors to achieve this.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a large-sized display screen is used to display high-resolution VR images, then image definition is improved, but device size and weight increase making it unsuitable for wearable applications

Engineering Contradiction:
Improveimage definitionVSAvoiddevice size
Core Design Contradiction:
Measurement precisionVSVolume of moving object

Solution Approach 1:

The optical system is segmented into multiple functional components: light-transmitting device (optical prism), light-converging device (lenses), and light-reflecting device (mirrors). This segmentation allows each component to perform a specific function in the optical path, enabling compact arrangement while maintaining high-resolution image quality.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The optical components are arranged in a nested configuration where the light-converging lenses are positioned within the optical path defined by the light-transmitting prism, and the light-reflecting mirrors are integrated into the same compact space. This nesting allows multiple optical elements to occupy overlapping or adjacent spatial volumes, achieving high resolution in a small form factor.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Measurement precision

If optical components are added to converge and reflect light for high-resolution display on small screens, then image definition is improved, but device complexity increases

Engineering Contradiction:
Improveimage definitionVSAvoidoptical system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The optical assembly performs multiple functions simultaneously: the light-transmitting device directs light from display screens, the light-converging lenses focus light to reduce image size while maintaining resolution, and the light-reflecting mirrors redirect light to the user's eyes. This multi-functionality is achieved through a unified optical assembly design where each component serves its primary purpose without requiring additional separate systems.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the light transmission, convergence, and reflection functions into a single integrated optical assembly rather than using separate systems. The optical prism, lenses, and mirrors are arranged in a compact configuration where they work together as one cohesive unit, reducing overall system complexity compared to multiple independent optical systems.

Inventive Principle:
Principle #5Merging (Combining)

3Volume of moving object

If the display screen size is reduced for wearable devices, then device portability is improved, but image resolution and quality deteriorate

Engineering Contradiction:
Improvedisplay screen sizeVSAvoidimage resolution
Core Design Contradiction:
Volume of moving objectVSMeasurement precision

Solution Approach 1:

The patent replaces the direct viewing of large display screens with an optical system that uses light transmission, convergence, and reflection. Instead of mechanically enlarging the display screen, the system uses optical lenses to converge light and create magnified virtual images, substituting mechanical size with optical manipulation to achieve high resolution on small screens.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The optical system changes the parameters of light propagation through the optical path. The light-converging lenses alter the convergence parameter of light rays, and the light-reflecting mirrors change the direction parameter of light. These parameter changes enable the system to maintain high image resolution while using a small display screen by manipulating how light travels and focuses.

Inventive Principle:
Principle #35Parameter changes

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 optical assembly enables the display of high-resolution VR images on small-sized screens, improving user experience by maintaining image definition and reducing the space occupied by VR components.

Implementation Method 1

a light-transmitting device, configured to receive light of a left-eye display image and light of a right-eye display image, and transmit the light of the left-eye display image and the light of the right-eye display image to a light-converging device

Methodology Applied
Scientific EffectLight transmission: Light

Implementation Method 2

the light-converging device, configured to converge the light of the left-eye display image and the light of the right-eye display image to a light-reflecting device, wherein a size of a first display image formed by converging the light of the left-eye display image is smaller than a size of the left-eye display image

Methodology Applied
Scientific EffectLight convergence: Lens

Implementation Method 3

the light-reflecting device, configured to reflect light of the first display image to a left eye of a user, and reflect light of the second display image to a right eye of the user

Methodology Applied
Scientific EffectLight reflection: Reflection

Data Source

PatentUS11474356B2Optical assembly and virtual reality device
Publication Date: 2022.10.18 ORDOS YUANSHENG OPTOELECTRONICS
  • US11474356B2 patent drawing
  • US11474356B2 patent drawing

AI summary

An optical assembly and a virtual reality device are provided. The optical assembly includes a light-transmitting device, a light-converging device, and a light-reflecting device. The light-transmitting device is configured to receive light of a left-eye display image and light of a right-eye display image, and transmit the light of the left-eye display image and the light of the right-eye display image to a light-converging device. The light-converging device is configured to converge the light of the left-eye display image and the light of the right-eye display image to a light-reflecting device. A size of a first display image formed by converging the light of the left-eye display image is smaller than a size of the left-eye display image, and a size of a second display image formed by converging the light of the right-eye display image is smaller than a size of the right-eye display image. The light-reflecting device is configured to reflect light of the first display image to a left eye of a user, and reflect light of the second display image to a right eye of the use.