Vehicle Display Image Tilt Correction via Two-Stage Inspection
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Solution Overview
Problem
Existing vehicle display devices face inefficiencies in adjusting for positional displacement due to image tilt, with complex mechanical adjustment procedures and a need for efficient correction methods.
Innovation Solution
A method and device that perform two inspections to calculate and store correction values for adjusting the image projection position on a windshield, using a control unit and non-volatile memory to correct image tilt by changing the projection position in the up-and-down direction, with separate values for stand-alone and vehicle-mounted units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical means are used to adjust positional displacement (adjusting part position or housing installation state), then adjustment precision can be improved, but the work procedure becomes complicated and time-consuming
Solution Approach 1:
The patent replaces mechanical adjustment mechanisms with a software-based correction system. The control unit calculates correction values based on the relationship between projection positions and image tilt, then applies these corrections digitally to the image display area, eliminating the need for mechanical part adjustments or housing reinstallation.
Solution Approach 2:
The patent changes parameters (correction values) to adjust the image display area and compensate for tilt. By modifying display parameters through calculation and storage in memory, the system achieves precise positional correction without physical mechanical changes to the device structure.
2Manufacturing precision
If mechanical adjustment methods are used for image tilt correction, then correction accuracy can be improved, but the adjustment time and productivity are reduced
Solution Approach 1:
The patent performs preliminary calculation of correction values based on pre-established relationships between projection positions and image tilt. By preparing correction data in advance and storing it in memory, the system enables rapid deployment without time-consuming on-site mechanical adjustments, significantly improving productivity while maintaining accuracy.
Solution Approach 2:
The patent substitutes mechanical adjustment procedures with automated computational correction. The control unit automatically calculates and applies correction values to the image display area, eliminating manual mechanical adjustment operations and thereby increasing adjustment speed and productivity.
3Productivity
If stand-alone inspection is performed first, then correction values can be pre-calculated, but an additional inspection step is required before vehicle installation
Solution Approach 1:
The patent segments the inspection and correction process into two distinct phases: stand-alone inspection for calculating basic correction values, and vehicle-mounted inspection for calculating additional correction values. This segmentation allows each phase to focus on specific correction needs, making the overall process more manageable and efficient despite the added step.
Solution Approach 2:
The patent performs preliminary inspection and correction value calculation during the stand-alone phase before vehicle installation. By preparing correction data in advance, the system reduces the adjustment workload during vehicle installation, improving installation efficiency even though an additional inspection step is required.
Data Source
AI summary
A method of adjusting a vehicle display device includes: performing a first inspection, calculating a first correction value, and writing the first correction value into a non-volatile memory of the vehicle display device; and performing a second inspection, calculating a second correction value, and writing the second correction value into the non-volatile memory of the vehicle display device, each of the first correction value and the second correction value is a value with which an image display area is corrected so that a tilt of an axis of the image is reduced, and in the second inspection, the display device displays an image to the image display area that has been corrected with the first correction value.