Display Device Control Signal Frequency Monitoring
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Solution Overview
Problem
Flat-panel display devices are susceptible to image errors due to abnormal control signals caused by power supply noise, which existing technologies do not adequately address, leading to potential damage and reduced reliability.
Innovation Solution
A display device equipped with a processor and a detector that measures the frequency of control signals and compares it to a threshold range to detect abnormalities, transmitting an abnormal detection signal to disable or reset the power supply, thereby preventing visually perceptible image errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supply is continuously provided to the display panel, then normal display operation is maintained, but the device becomes vulnerable to image errors when control signals become abnormal due to power supply noise
Solution Approach 1:
The detector continuously monitors control signal characteristics (frequency, pulse width) before abnormality causes visible image errors. When deviations are detected within threshold ranges, the system preemptively disables power supply to prevent harmful display artifacts, rather than waiting for errors to manifest
Solution Approach 2:
The system establishes a closed-loop feedback mechanism where the detector monitors control signal parameters and provides real-time information to the processor. The processor adjusts power supply state based on this feedback, creating a dynamic protection system that adapts to signal quality variations
2Reliability
If a detector and processing system is added to monitor control signals, then reliability is enhanced through abnormality detection, but device complexity increases
Solution Approach 1:
The detector is designed to monitor multiple control signal parameters (frequency, pulse width) simultaneously using a single circuit block. The processor performs both normal control signal processing and abnormality detection functions, reducing the need for separate dedicated circuits for each monitoring function
Solution Approach 2:
The system uses its existing control signal paths and processing infrastructure to perform self-diagnosis. The detector leverages the already-present control signals to monitor their own quality, and the processor utilizes its existing computational resources to analyze signal characteristics without requiring external monitoring equipment
Data Source
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AI summary
A display device is provided including a display unit configured to display an image; a processor that supplies a control signal for controlling a driving of the display unit; a detection circuit that detects whether the control signal is abnormal based on a frequency of the control signal measured in a frame unit; and a power supply that supplies driving power to the display unit, where the driving power is blocked from being supplied to the display unit when the control signal is detected to be abnormal. The detection circuit detects whether the control signal is abnormal based on an average frequency of the control signal for N successive frames, where N is a natural number of 2 or more.