Head-Mounted Display With Adaptive Infrared Filtering

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Solution Overview

Problem

Users wearing head-mounted display devices experience difficulties in seeing surrounding objects due to ambient brightness being too low or too bright, affecting their experience.

Innovation Solution

A head-mounted display device with a movable infrared light filter and video sensing element that adjusts to ambient brightness by removing or attaching the filter as needed, utilizing infrared light for clear video capture in low light conditions and filtering infrared light in bright conditions, combined with an optical waveguide lens for projection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the head-mounted display device blocks ambient light to display virtual content, then the display quality is improved, but the user cannot see surrounding objects

Engineering Contradiction:

Improvedisplay brightnessVSAvoidvisibility of surrounding objects

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a movable infrared light filter that can dynamically change its position between attached and removed states based on ambient lighting conditions. This dynamic adjustment allows the system to adapt to different environmental conditions, enabling clear video capture in low light while maintaining visibility in bright conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the optical parameter of the video sensing element by introducing or removing the infrared light filter. This parameter change allows the sensing element to selectively capture infrared light in low ambient brightness conditions while blocking it in bright conditions, thereby optimizing video capture quality across different lighting environments.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the infrared light filter is attached to capture infrared light, then video quality in low light is improved, but the filter may be damaged by high temperature in bright conditions

Engineering Contradiction:

Improvevideo capture qualityVSAvoidfilter temperature

Core Design Contradiction:

Measurement precisionVSTemperature

Solution Approach 1:

The patent employs a movable infrared light filter that can be dynamically positioned. In bright ambient conditions, the filter is removed to prevent overheating and potential damage. In low light conditions, the filter is attached to enable infrared light capture. This dynamic positioning resolves the contradiction between utilizing the filter's protective function and preventing thermal damage.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent extracts the infrared light filter from the fixed structure and makes it movable. This extraction allows the filter to be selectively included or excluded from the optical path based on ambient conditions, preventing thermal damage in bright conditions while maintaining its protective function in low light conditions.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the head-mounted display device uses a fixed optical structure, then the device complexity is reduced, but it cannot adapt to different ambient brightness conditions

Engineering Contradiction:

Improveoptical structure complexityVSAvoidadaptability to ambient brightness

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent introduces a movable infrared light filter that can be positioned or removed based on ambient lighting conditions. This dynamic element adds minimal complexity while significantly enhancing the device's adaptability to different ambient brightness conditions, allowing optimal performance across diverse environments.

Inventive Principle:

Principle #15Dynamics

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

Enhances user experience by providing clear video of surroundings regardless of ambient brightness levels through adaptive video sensing and projection, maintaining visibility and comfort.

Implementation Method 1

a movable infrared light filter and video sensing element that adjusts to ambient brightness by removing or attaching the filter as needed, utilizing infrared light for clear video capture in low light conditions

Methodology Applied

Scientific EffectInfrared light filtering: Absorption (EM radiation)

Implementation Method 2

combined with an optical waveguide lens for projection

Methodology Applied

Scientific EffectOptical waveguide transmission: Waveguide (optics)

Data Source

PatentUS20250298252A1Head-mounted display device and display system

Publication Date: 2025.09.25 ASPHETEK SOLUTION (CHENGDU) LTD

AI summary

A head-mounted display device is provided, comprising a device body, an optical waveguide lens, an optical component, and one or more video component. The optical waveguide lens and the one or more video component are relatively arranged, the optical waveguide lens and the one or more video component are arranged in the device body, the optical component is detachably installed on the device body, the optical component is arranged on a side of the optical waveguide lens away from the one or more video component, the video component comprises a video sensing element and an infrared light filter, the video sensing element is arranged at a sider of the optical waveguide lens away the optical component, the infrared light filter is movably arranged on a side of the video sensing element away from the optical waveguide lens. A display system is also provided.