Vehicle HUD Display Controller Vibration Adaptation

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Solution Overview

Problem

Vehicle head-up displays (HUDs) face challenges in maintaining optimal image display during vehicle vibrations, particularly when the combiner and projection unit vibrate differently, leading to reduced visibility and potential image disruption in applications like construction machines.

Innovation Solution

A projection type display device equipped with a light modulator, vibration detectors for the combiner and projection unit, and a display controller that adjusts the image display format based on detected vibrations, ensuring continuous and optimal visibility by changing the display format in response to relative vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the HUD increases the size of display content during vehicle vibration, then visibility is enhanced, but the display format becomes less adaptable when combiner and unit vibrations differ

Engineering Contradiction:

ImprovevisibilityVSAvoiddisplay format adaptability

Core Design Contradiction:

Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The display controller dynamically adjusts the display format based on real-time vibration detection. When relative vibration between the combiner and projection unit exceeds a threshold, the system switches from a first display format to a second display format, making the display adaptable to varying vibration conditions rather than using a fixed format adjustment strategy

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes display parameters (format, size, position) based on detected vibration characteristics. The display controller monitors vibration signals from both the combiner and projection unit, and adjusts display content parameters accordingly, allowing the display to adapt to different vibration scenarios through parameter modification

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If the HUD stops display during large vehicle vibration, then forward visibility is secured, but continuous usage during vibration is prevented

Engineering Contradiction:

Improveforward visibilityVSAvoidcontinuous usage

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

Instead of statically stopping display during vibration, the system dynamically adjusts the display format based on real-time vibration detection. The display controller continuously monitors vibration signals and switches between display formats, enabling continuous operation while maintaining visibility by adapting to vibration conditions rather than halting operation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system converts the harmful effect of vibration into useful information by detecting vibration signals and using them to control display format adjustments. The vibration that would normally degrade visibility is instead used as a control signal to switch to a more suitable display format, turning the harmful factor into a beneficial control mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Adaptability or versatility

If the combiner and projection unit are installed at different positions, then system design flexibility is improved, but relative vibration between components increases during vehicle operation

Engineering Contradiction:

Improveinstallation flexibilityVSAvoidrelative vibration stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The system uses vibration detectors to monitor the relative vibration between the combiner and projection unit, and the display controller adjusts the display format based on this feedback. The closed-loop control system detects vibration signals and responds by switching display formats, compensating for the instability caused by different installation positions

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The display controller acts as an intermediary that processes vibration signals from both the combiner and projection unit, and translates these signals into appropriate display format adjustments. This intermediary component协调s the interaction between the two separately mounted components, managing the relative vibration effects through intelligent control

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10642034B2Projection type display device, control method of projection type display device, control program of projection type display device

Publication Date: 2020.05.05 FUJIFILM CORP

AI summary

Provided are a projection type display device, a control method of a projection type display device, and a control program of a projection type display device, capable of being continuously used even in a case where a vehicle vibrates, and performing optimal display depending on the vibration. An HUD 100 includes a projection display section 50 that projects image light obtained by spatially modulating light emitted from a light source onto a combiner 12 to display a virtual image, a first vibration detector 61 that detects a first vibration of the combiner 12, a second vibration detector 62 that detects a second vibration of the projection display section 50, a third vibration detector 63 that detects a third vibration of the projection display section 50 with respect to the combiner 12 on the basis of the first vibration and the second vibration, and a display controller 64 that controls the image to be displayed by the projection display section 50. The display controller 64 changes a display format of content to be displayed by the projection display section 50 on the basis of the third vibration.