3D Head-Up Display Vibration Compensation Using Acceleration Feedback

Solution Overview

Problem

Movable objects equipped with head-up display systems experience vibrations, causing the virtual image plane to vibrate, leading to an uncomfortable viewing experience for users as they must adjust their viewpoint to maintain clarity.

Innovation Solution

A head-up display system incorporating a three-dimensional display device, an optical member, and an accelerometer, where the accelerometer detects acceleration and adjusts the image position on the display panel to counteract vibrations, ensuring a stable virtual image plane for the user.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the head-up display apparatus uses a fixed optical system to form a virtual image plane, then the structure is simple and easy to manufacture, but the virtual image plane vibrates when the vehicle moves, causing discomfort to the user

Engineering Contradiction:

Improvestructural simplicityVSAvoidvibration of virtual image plane

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by making the display panel movable rather than fixed. The display panel is positioned on a movable support that can adjust its position in response to detected vibrations. This dynamic adjustment allows the display panel to compensate for vehicle movements, keeping the virtual image plane stable relative to the user's line of sight while maintaining overall system simplicity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback by using a vibration sensor to detect vehicle vibrations and using this information to control the position of the display panel. The control unit receives vibration signals and adjusts the display panel position accordingly, creating a closed-loop system that actively compensates for disturbances. This feedback mechanism stabilizes the virtual image plane without requiring a completely complex optical system.

Inventive Principle:

Principle #23Feedback

2Stability of the object's composition

If the head-up display apparatus uses a movable display panel to compensate for vibrations, then the virtual image plane remains stable, but the device complexity increases

Engineering Contradiction:

Improvestability of virtual image planeVSAvoidsystem complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the display panel movable rather than fixed. The display panel is positioned on a movable support that can adjust its position in response to detected vibrations. This dynamic adjustment allows the display panel to compensate for vehicle movements, keeping the virtual image plane stable relative to the user's line of sight while maintaining overall system simplicity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback by using a vibration sensor to detect vehicle vibrations and using this information to control the position of the display panel. The control unit receives vibration signals and adjusts the display panel position accordingly, creating a closed-loop system that actively compensates for disturbances. This feedback mechanism stabilizes the virtual image plane without requiring a completely complex optical system.

Inventive Principle:

Principle #23Feedback

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 system allows users to view the virtual image plane comfortably by compensating for vibrations, reducing the need for frequent viewpoint adjustments and enhancing the overall display stability.

Implementation Method 1

an optical element, and a controller. The display panel displays an image. The optical element defines a traveling direction of image light emitted from the display panel

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

The optical member reflects the image light from the three-dimensional display device toward a user's eye

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 3

The accelerometer detects acceleration of the three-dimensional display device

Methodology Applied

Scientific EffectAcceleration detection: Accelerometer

Data Source

PatentUS11882268B2Head-up display system and movable object

Publication Date: 2024.01.23 KYOCERA CORP

AI summary

A head-up display system includes a three-dimensional display device, an optical member, and an accelerometer. The three-dimensional display device includes a display panel, an optical element, and a controller. The display panel displays an image. The optical element defines a traveling direction of image light emitted from the display panel. The optical member reflects the image light from the three-dimensional display device toward a user's eye. The optical member is at a fixed position relative to the three-dimensional display device. The accelerometer detects acceleration of the three-dimensional display device. The controller controls a position of the image on the display panel based on the acceleration.