Head-Up Display Brightness Monitoring to Prevent Driver Dazzling
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Solution Overview
Problem
Existing head-up displays in the automotive sector face issues with excessive image brightness, leading to user dazzling and potential safety hazards, especially in low ambient light conditions, due to the lack of effective brightness control mechanisms.
Innovation Solution
A head-up display system incorporating an image brightness monitoring device connected to the image control unit and display element, which monitors and adjusts image brightness in real-time to prevent excessive brightness, using shielding and error monitoring to minimize signal interference and ensure user safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display element is set to high brightness to ensure visibility, then the image visibility is improved, but the user may be dazzled in low ambient light conditions
Solution Approach 1:
The patent implements a feedback mechanism where an image brightness monitoring device continuously monitors the brightness of the image signal and provides feedback to the image control unit. This closed-loop control allows the system to automatically adjust brightness levels, ensuring visibility while preventing excessive brightness that could dazzle the user in low ambient light conditions.
Solution Approach 2:
The monitoring device is positioned to check image brightness before the image is fully displayed to the user. By performing preliminary brightness verification, the system can prevent dazzling before it occurs, rather than reacting after the problem arises.
2Reliability
If shielding measures are implemented to prevent signal interference, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces an image brightness monitoring device as an intermediary component between the image control unit and the display element. This monitoring device acts as a mediator that verifies signal integrity and brightness levels without requiring complex shielding measures, thereby maintaining reliability while minimizing additional complexity.
Data Source
AI summary
A head-up display having a display apparatus comprising a picture generating unit comprising a display element for displaying an image and a driver for the display element, an optical unit for projecting the image onto a projection surface, and an image control unit for controlling the display element via the driver. The picture generating unit further comprises an image brightness monitoring device, which has an image signal input connected to an image signal output of the image control unit and has a signal output connected to a signal input of the display element.