Virtual Reality Device Locking Mode for Power Conservation

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Solution Overview

Problem

Virtual reality devices are uncomfortable due to weight and high power consumption, causing user discomfort and limited operation time, especially when used for extended periods without significant head movement.

Innovation Solution

The virtual reality device enters a locking mode when the viewing elevation angle remains stable for a predetermined time, constraining the image content to a fixed main viewpoint and reducing the frame rate, which simplifies image rendering and conserves power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the virtual reality device maintains high frame rate display to reduce user dizziness, then the user comfort is improved, but the power consumption increases and operation time is limited

Engineering Contradiction:

Improveuser comfortVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic frame rate adjustment based on user head movement detection. When the sensing unit detects that the user's head position remains relatively stable for a predetermined time period, the system automatically reduces the frame rate from high (60fps) to low (30fps or lower). This dynamic adaptation maintains user comfort during active usage while conserving power during static periods, directly resolving the contradiction between comfort and power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameter (frame rate) based on detected user behavior patterns. By monitoring head movement parameters through the sensing unit and adjusting the display refresh rate accordingly, the system optimizes the balance between visual stability (user comfort) and energy consumption, allowing the same device to operate effectively under different usage conditions.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the virtual reality device covers user's eyes with helmet or goggles to provide wider viewing angle, then the viewing angle is improved, but the device weight increases causing user discomfort

Engineering Contradiction:

Improveviewing angleVSAvoiddevice weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The patent replaces the traditional mechanical/optical approach of providing wide viewing angles through helmet design with a computational approach. Instead of relying solely on physical field of view expansion, the system uses head movement detection and dynamic rendering to maintain immersive experience with potentially lighter hardware, substituting mechanical design constraints with software-based adaptation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If the virtual reality device renders images in real time according to user's head movement, then the immersion sense is improved, but the computational load increases power consumption

Engineering Contradiction:

Improveimmersion senseVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts rendering intensity based on real-time detection of head movement. When the sensing unit detects stable head position for a predetermined period, the graphic processing unit reduces rendering frequency and frame rate, thereby lowering computational load and power consumption while maintaining the immersive experience through selective high-performance rendering during active movement periods.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes computational parameters (frame rate, rendering frequency) based on detected user behavior. This parameter adaptation allows the system to maintain high immersion quality when needed while consuming less power during static viewing periods, effectively resolving the contradiction between immersion and power consumption.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11051005B2Virtual reality device and operation method of virtual reality device

Publication Date: 2021.06.29 SUZHOU RAKEN TECH

AI summary

A virtual reality device and the operation method of virtual reality device, and the method includes: the virtual reality device displays an image content according to a corresponding viewing angle of a user; and when the time of virtual reality device detects that the viewing elevation angle is greater than a predetermined angle for a time period which exceeds a predetermined time period, the virtual reality device enters a locking mode; in the locking mode, the virtual reality device displays the image content with a fixed main field, and the virtual reality device constrains the viewing angle of the image content from the movement or rotation of the user. The present invention can determine whether to enter the locking mode according to a preset condition, and provide the main image content of the fixed field of view in the locking mode in order to achieve user convenience and save power.