Vehicle Head-Up Display Adaptive Eyebox Positioning

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Solution Overview

Problem

Current head-up displays in vehicles require manual adjustment of the eyebox to accommodate different drivers' eye levels and are cumbersome to reposition when seat settings change, leading to discomfort and inefficiency.

Innovation Solution

A vehicle head-up display system that uses a displacement sensor to measure the distance to the driver's face, adjusting the display position and angle automatically based on these measurements, and includes a control unit to calculate the optimal display settings, allowing for adaptive positioning and detection of driver presence or absence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual adjustment of the eyebox is used to accommodate different drivers' eye levels, then the display can be positioned correctly for each driver, but the operation becomes cumbersome and time-consuming when seat settings change or different drivers use the vehicle

Engineering Contradiction:

Improveeyebox positioning accuracyVSAvoidmanual adjustment convenience

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The system automatically detects the driver's eye level and adjusts the eyebox position without manual intervention. The control unit receives eye level information from the driver detection system and autonomously repositions the display, eliminating the need for manual adjustment while maintaining accurate positioning.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The manual mechanical adjustment system is replaced with an automated detection and control system. The driver detection system (using cameras or sensors) and control unit substitute for manual mechanical adjustment, automatically determining eye level and adjusting the eyebox position electronically.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If the eyebox position is fixed for a single driver, then the display position remains stable, but the system cannot adapt when different drivers with different eye levels use the vehicle

Engineering Contradiction:

Improvedisplay position stabilityVSAvoidmulti-driver adaptability

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The eyebox position transitions from a fixed static setting to a dynamic adjustable position. The system continuously adapts the eyebox location based on real-time detection of the current driver's eye level, allowing the display to remain stable for each individual driver while adapting to different drivers sequentially.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the positional parameters of the eyebox based on detected driver characteristics. By measuring eye level and adjusting the display position accordingly, the system maintains optimal viewing conditions for each driver while preserving stability during each driver's usage period.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If the driver needs to reposition the eyebox after every seat adjustment, then the display can remain at the correct eye level, but this frequent manual repositioning reduces efficiency and increases complexity

Engineering Contradiction:

Improveeye level alignment accuracyVSAvoidtime for repositioning

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system continuously monitors seat position and driver eye level, providing real-time feedback to the control unit. When seat adjustment is detected or eye level changes are measured, the system automatically adjusts the eyebox position to maintain accurate alignment, eliminating the need for manual repositioning and reducing time loss.

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 provides a comfortable and efficient automatic adjustment of the eyebox for individual drivers, reducing the need for manual repositioning and enhancing safety by detecting driver presence or absence, thus improving driving experience and safety.

Implementation Method 1

performing a distance measurement by using a displacement sensor for measuring a distance to a face of one or more drivers

Methodology Applied

Scientific EffectDisplacement sensing: Displacement

Implementation Method 2

The optical system is configured to project an image displayed on the display panel onto a windshield or a combiner and to control the position and an angle of the image to be displayed

Methodology Applied

Scientific EffectOptical projection: Refraction

Data Source

PatentUS11428945B2Head-up display for vehicle and method for controlling the same

Publication Date: 2022.08.30 HYUNDAI MOBIS CO LTD

AI summary

A vehicle head-up display that automatically repositions an eyebox by measuring a distance to a driver's face and a method of controlling the same are disclosed. A method of controlling a vehicle head-up display according to some embodiments includes performing a distance measurement by using a displacement sensor for measuring a distance to a face of a driver and performing a display position adjustment including adjusting a display position and a display angle of head-up display information based on a measured distance to the face of the driver. Positioning of driver's face and then automatically adjusting the display position and the display angle of the head-up display information adaptively to individual drivers can reduce the inconveniences of the manual setting of the head-up display in a vehicle frequented with car-sharing drivers.