Rotating HUD Screen for Driver Head Tracking
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Solution Overview
Problem
Combiner head-up displays (HUDs) have a smaller screen size due to the need to compensate for driver head movements, limiting the display area and information visibility.
Innovation Solution
A HUD system comprising a detection unit, a picture generating unit, and a control unit that adjusts the screen's angle and position to maintain optimal alignment with the driver's head, increasing the usable display area by compensating for head movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the combiner HUD uses a fixed projection surface to compensate for driver head movements, then the alignment with the driver is maintained, but the usable screen area is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the projection surface movable rather than fixed. The combiner screen is mounted on a rotating mechanism that allows it to dynamically adjust its orientation based on the detected head position of the driver. This enables the system to maintain proper alignment with the driver's eyes while utilizing a larger portion of the physical screen area, as the screen can be rotated to face the driver regardless of head position variations.
Solution Approach 2:
The system implements feedback by using a detection unit (camera or sensor) to continuously monitor the driver's head position and feeding this information back to the control unit. The control unit then adjusts the rotation angle of the combiner screen accordingly. This closed-loop feedback mechanism ensures that the projection surface always maintains optimal alignment with the driver's line of sight, resolving the contradiction between alignment stability and usable screen area.
2Area of stationary object
If the combiner HUD uses a larger physical screen, then more information can be displayed, but the cost increases
Solution Approach 1:
By implementing a rotatable combiner screen mechanism, the system allows a standard-sized screen to function as a larger effective display area. The screen can be rotated to different angles to accommodate various driver positions and viewing requirements, effectively increasing the usable display area without proportionally increasing the physical screen size or manufacturing cost.
Solution Approach 2:
The system changes the orientation parameter of the combiner screen dynamically rather than increasing the screen size parameter. By adjusting the rotation angle of the screen based on detected head position, the system achieves the effect of a larger display area while using a standard-sized, cost-effective screen, thus resolving the contradiction between display area and manufacturing cost.
3Device complexity
If the combiner HUD uses a fixed orientation, then the structure is simple, but it cannot adapt to driver head movements
Solution Approach 1:
The patent introduces a rotating mechanism for the combiner screen that enables dynamic adaptation to driver head movements. The screen can be rotated around a vertical axis to maintain proper alignment regardless of the driver's head position. This dynamic capability is achieved through a relatively simple mechanical rotation system controlled by a motor or actuator, adding minimal structural complexity while significantly improving adaptability.
Solution Approach 2:
The system uses a detection unit to monitor driver head position and provides feedback to a control unit, which then adjusts the combiner screen orientation accordingly. This feedback-based control system enables the structure to adapt to head movements automatically, achieving high versatility with minimal additional complexity through the use of sensors and a control algorithm.
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 usable screen area of the HUD, ensuring that more information can be displayed without being obstructed by the need to reserve space for head movement compensation, thereby improving driver visibility and safety.
Implementation Method 1
The optical unit projects the visual image onto the combiner
Data Source
AI summary
A head-up display (HUD) comprises a detection unit, a picture generating unit and a control unit. The detection unit detects a position of an object and generates a detection signal indicated the position of the object. The picture generating unit comprises a screen and an optical unit. The screen displays a visual image. The optical unit projects the visual image onto the screen. The control unit is coupled to the detection unit and the picture generating unit, controlling the screen to facing toward the object in response to the detection signal.