HUD Cover Scraper for Adhered Object Removal
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Solution Overview
Problem
Existing HUD systems frequently wear out the exit surface due to frequent cleaning, leading to degraded display quality, and users may not detect dirt effectively when cleaning is user-operated, resulting in incomplete removal of adhered objects.
Innovation Solution
A projection display device with a region detecting unit and object removal control unit that activates the object removing mechanism only when predetermined display content is blocked by an adhered object, using a movable scraper with a narrow width to minimize surface contact and maintain display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the object removing mechanism is activated frequently to remove adhered objects from the exit surface, then the display quality is maintained, but the exit surface is worn and display quality is degraded
Solution Approach 1:
The system uses an image capturing unit to detect adhered objects on the exit surface and automatically activates the object removing mechanism only when objects are detected, eliminating the need for frequent manual cleaning operations and reducing wear on the exit surface
Solution Approach 2:
The system continuously monitors the exit surface using an image capturing unit and provides feedback to the control unit, which then activates the object removing mechanism only when necessary, creating a closed-loop control system that optimizes cleaning frequency
2Duration of action of stationary object
If the object removing mechanism is activated only on user operation to reduce wear on the exit surface, then the lifespan of the exit surface is extended, but users may not detect dirt effectively and cleaning is not appropriately performed
Solution Approach 1:
The image capturing unit automatically detects adhered objects on the exit surface and triggers cleaning operations without user intervention, ensuring that cleaning is performed appropriately based on actual contamination levels rather than user awareness
Solution Approach 2:
The system replaces manual user detection and operation with an automated optical detection system (image capturing unit) that objectively identifies adhered objects and triggers cleaning operations
3Reliability
If a wide scraper is used to remove objects from the entire exit surface, then all adhered objects are removed effectively, but the surface wear is increased
Solution Approach 1:
The system uses a narrow scraper that targets only the specific region where adhered objects are detected, rather than cleaning the entire exit surface, thereby minimizing unnecessary wear on clean areas while effectively removing objects from contaminated regions
Solution Approach 2:
The exit surface is divided into regions based on object detection results, and the scraper operates only in the contaminated region, segmenting the cleaning operation to match the actual contamination pattern
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 solution reduces the frequency of surface cleaning, minimizes wear on the exit surface, and ensures effective removal of adhered objects only when critical display content is affected, thereby maintaining high display quality and user safety.
Implementation Method 1
a light modulating unit spatially modulating light emitted from a light source on the basis of input image information and projects image light obtained as a result of spatial modulation
Implementation Method 2
an object removing mechanism that removes an object adhered to a front surface of the cover by scraping the front surface of the cover
Data Source
AI summary
A HUD including a projection display unit, a housing, a cover, a region detection unit, an object removing mechanism and an object removal control unit is provided. The projection display unit spatially modulates light emitted from a light source as image information and projects image light obtained from spatial modulation onto a windshield to display an image. The housing accommodates the projection display unit and has an opening portion through which the image light exits. The cover covers the opening portion. The region detecting unit detects an object adhesion region in which the object is adhered to the cover. The object removing mechanism removes an object adhered to a front surface of the cover by scraping the front surface of the cover. The object removal control unit activates the object removing mechanism when important display content is included in a portion of the image light, the portion being blocked.