Vehicle Display Update Detection Using Triangular Screen Regions
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Solution Overview
Problem
Existing vehicle devices face challenges in determining whether an entire display screen has been updated efficiently, particularly with the increase in display size and definition, leading to prolonged processing times and potential delays in periodic updates or incorrect display on multiple devices.
Innovation Solution
A vehicle device configuration that includes a graphic processing unit, a synthesizer, and a determiner, where the synthesizer divides the display region into triangular unit regions and draws a determination image within a set region, allowing the determiner to compare the prepared and actual images in the frame buffer to determine if the screen has been updated, thereby reducing processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire display screen is checked for updates by comparing all pixels, then the accuracy of update detection is improved, but the processing time increases significantly
Solution Approach 1:
The display screen is divided into multiple triangular unit regions, and a determination region is selected within the pasting region. Instead of comparing all pixels across the entire screen, the system only compares pixels within this specific determination region, thereby maintaining update detection accuracy while significantly reducing processing time.
2Manufacturing precision
If display size and definition are increased, then the display quality is improved, but the time required to process and verify screen updates increases
Solution Approach 1:
The system extracts only the necessary determination region from the entire pasting region for update verification. By focusing computational resources on this specific subset of pixels rather than processing the entire high-resolution display screen, the system maintains display quality while reducing the time required to verify updates.
3Reliability
If periodic updates are performed on multiple display devices, then the comprehensiveness of display monitoring is improved, but the time available for each update decreases
Solution Approach 1:
By segmenting the verification process to focus on a specific determination region rather than the entire screen, the system reduces the time required for each update check. This enables periodic updates to be performed on multiple display devices within the available time window, maintaining comprehensive monitoring reliability.
Data Source
AI summary
A vehicle device includes an application as a determiner configured to determine whether a frame buffer has been updated. The application is further configure to set a determination region, prepare a determination image to be drawn in the determination region, request a GPU to draw the prepared determination image, read the determination image that is actually drawn in the frame buffer by the GPU, and determine that the frame buffer has been updated when the prepared determination image matches the read determination image.