Head-Up Display Glare Error Detection Circuit
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Solution Overview
Problem
Head-up displays face challenges in maintaining visual recognizability of the background due to increased pixel ratios blocking the background or excessive luminance, which can lead to reduced user visibility, often caused by abnormal image data or processing errors.
Innovation Solution
A circuit device equipped with an error detection circuit that calculates a glare index value based on image data and determines if it exceeds threshold values, triggering processing to address glare errors, including notification and display-off processing to restore visual recognizability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the pixel ratio in the display region increases to provide more display information, then the information display capability is improved, but the visual recognizability of the background deteriorates due to increased glare
Solution Approach 1:
The error detection circuit performs preliminary detection of the glare index value before the display is fully rendered, calculating the glare index based on image data to determine if it exceeds a threshold. This allows preventive action to be taken before the harmful glare effect fully manifests, resolving the contradiction by anticipating and preventing background obscuration while maintaining high information display capability.
2Illumination intensity
If the luminance of the display is increased to improve visibility of display content, then the display visibility is improved, but the visual recognizability of the background deteriorates due to excessive brightness
Solution Approach 1:
The error detection circuit continuously monitors the glare index value calculated from display image data and provides feedback by comparing it against a threshold. When the glare index exceeds the threshold, the system receives notification and can adjust luminance parameters. This feedback mechanism resolves the contradiction by dynamically balancing display luminance for visibility while preventing excessive brightness that would obscure the background.
3Manufacturing precision
If image processing is enhanced to improve display quality, then the display quality is improved, but the occurrence of processing errors that cause glare increases
Solution Approach 1:
The error detection circuit performs preliminary validation of image data by calculating the glare index value before the processed image is displayed. This preliminary action detects processing errors that would cause glare, allowing the system to notify external devices or correct errors before they affect display quality. This resolves the contradiction by maintaining enhanced image processing while preventing processing errors from degrading reliability.
Data Source
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AI summary
A circuit device 100 includes an error detection circuit 110 and a processing circuit 120. The error detection circuit 110 obtains a glare index value, which is an index value indicating glare of a head-up display, based on image data IMD for head-up display. The error detection circuit 110 determines whether or not a glare index value has exceeded a first threshold value, and when the glare index value exceeds the first threshold value, detects occurrence of a first glare error. When occurrence of a first glare error is detected, the processing circuit 120 performs processing corresponding to the first glare error.