Head-Up Display Mirror Control for Precise Eyebox Positioning
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Solution Overview
Problem
Existing HUD systems face inaccuracies in adjusting the height of displayed information due to the minimum angle of change of the mirror, leading to imprecise movements and longevity issues with motor components.
Innovation Solution
A method and apparatus that utilize motor driving and video timing control to adjust the position of a mirror, allowing for precise positioning of the display region within the user's eyebox by combining mechanical and video control to reduce backlash errors and extend motor durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mirror tilt is adjusted using a motor with minimum angle change, then the HUD height can be changed, but the positioning precision is insufficient
Solution Approach 1:
The patent replaces the purely mechanical mirror adjustment system with a hybrid system that combines motor-driven mirror tilt with video timing control. The video controller adjusts the display timing and position to compensate for the discrete steps of motor-driven mirror adjustment, achieving continuous and precise HUD positioning that overcomes the minimum angle change limitation of the motor.
2Adaptability or versatility
If the motor is constantly driven to adjust mirror position, then the HUD position can be changed, but the motor component longevity is reduced
Solution Approach 1:
The patent substitutes video timing control for frequent mechanical motor operations. The video controller adjusts display parameters to achieve fine positioning between motor steps, reducing the need for constant motor actuation and thereby extending motor component lifespan while maintaining full position adjustability.
Solution Approach 2:
The patent uses partial action by combining two control mechanisms: the motor provides coarse adjustment to reach near the target position, and video timing control provides fine adjustment for precise positioning. This division of labor reduces overall motor usage and wear.
3Ease of operation
If the mirror minimum angle change is used for adjustment, then the system is simple to operate, but the positioning accuracy is insufficient
Solution Approach 1:
The patent merges motor-driven mirror adjustment with video timing control into a unified system. The motor handles large-position adjustments with simple operation, while video timing control adds fine-grained positioning capability. The combined system maintains ease of operation through automated control while achieving high positioning accuracy.
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 the accuracy of HUD positioning and extends the lifespan of motor components by reducing mechanical stress through collaborative motor and video timing control, ensuring the display region is optimally positioned for the user.
Implementation Method 1
controlling a motor to drive a tilt of the mirror to thereby change a tilt position of the mirror
Implementation Method 2
adjusting the perceived region within the display region using a video timing control
Implementation Method 3
A heads-up display (HUD) generally provides information on a windshield of a vehicle that can be viewed by a driver of the vehicle
Data Source
AI summary
A method includes receiving a user input by a video display controller, determining a position of a perceived region based on the user input, determined a variance of at least one or more lines outside an eyebox of a user based on the position of the perceived region, calculating a corresponding position of a mirror based on the variance of the one or more lines being outside of the eyebox, and causing the perceived region to appear within the eyebox of the user based on the corresponding position of the mirror and the determined variance of the one or more lines.