Display System Artifact Injection for Power-Based Verification
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Solution Overview
Problem
Existing digital systems cannot reliably determine if critical information is being displayed on a screen, as they cannot distinguish between image data being sent and actual display success, especially in cases of power supply noise and cable failures.
Innovation Solution
A display system that injects a known image artifact into the image frames, measuring power consumption differences between frames with and without the artifact to ensure proper display operation, using a graphics controller, difference injector, display controller, power measurement circuit, arithmetic controller, and error detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hash value comparison is used to verify image data integrity, then data transmission accuracy can be confirmed, but the system cannot detect actual display failures
Solution Approach 1:
The patent introduces a power measurement circuit as an intermediary component that measures the power consumption of the display device. This mediator provides indirect evidence of display operation by detecting power usage patterns, enabling the system to verify actual display output rather than just confirming data transmission integrity through hash comparison alone.
2Measurement precision
If power measurement is used to detect display operation, then actual display success can be determined, but the system becomes unable to distinguish power supply noise from genuine display activity
Solution Approach 1:
The patent applies preliminary action by modifying the image data before display to include a known artifact with specific power consumption characteristics. This pre-modification enables the system to have an expected power signature to compare against actual measurements, allowing distinction between noise and genuine display activity through pattern recognition rather than raw power measurement alone.
Solution Approach 2:
The patent utilizes changes in power consumption characteristics (analogous to color changes in optical detection) by introducing artifacts that create distinguishable power signatures. Different image content produces different power consumption patterns, enabling the system to recognize genuine display activity versus noise through these characteristic variations.
3Loss of information
If the display system monitors image data characteristics, then data integrity can be verified, but the system cannot detect cable failures or physical display issues
Solution Approach 1:
The patent implements feedback by creating a closed-loop verification system. The power measurement circuit continuously monitors display power consumption and feeds this information back to the controller, which compares actual power usage against expected values. This feedback mechanism enables real-time detection of physical failures such as cable disconnections or display malfunctions, complementing the open-loop image data integrity checks.
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
Enables high-confidence detection of display system operation by measuring power consumption changes caused by the artifact, distinguishing between noise and actual display success, thus ensuring critical information is properly displayed.
Implementation Method 1
The power measurement circuit can measure a first power characteristic and a second power characteristic during respective display of the image frame and the modified image frame on a display screen of the display system
Data Source
AI summary
A display system includes a graphics controller, a difference injector, a display controller, a power measurement circuit, an arithmetic controller and an error detector. The graphics controller provides an image frame to the difference injector. The difference injector modifies the image frame by a known image artifact, and provides the image frame and the modified image frame to the display controller. The display controller displays the image frame and the modified image frame at a display screen. The power measurement circuit measures a first power characteristic of the display screen during the display of the image frame and a second power characteristic of the display screen during the display of the modified image frame. The arithmetic controller determines a differential power characteristic based on the first and second power characteristics. The error detector determines whether the differential power characteristics are indicative of the display of a known image artifact.