Display Panel Driving Apparatus Voltage Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in controlling power supply to flat panel displays, particularly in distinguishing between continuous and non-continuous short circuits, which can lead to momentary shutdowns due to static electricity or environmental factors, causing the DC-DC converter to malfunction and fail to detect short circuits effectively.
Innovation Solution
A driving apparatus for display panels that includes a DC-DC converter, a signal controller, and a driving controller. The driving controller compares the driving power source voltage with a pulse voltage to determine the operation state of the DC-DC converter and adjusts the power supply enable signal to ensure normal operation, detecting and recovering from momentary shutdowns and short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power short circuit protection circuit is used to protect the display panel, then the display panel is protected from continuous short circuit damage, but the DC-DC converter may be momentarily and intermittently shut down due to static electricity or environmental factors, causing the display device to fail to detect the short circuit and remain in shutdown state
Solution Approach 1:
The driving controller continuously monitors the driving power source voltage from the DC-DC converter and compares it with the power supply enable signal state. When a mismatch is detected (voltage present but enable signal low), the controller generates a wake-up signal to reset the DC-DC converter, enabling automatic recovery from momentary shutdowns while maintaining protection against continuous short circuits.
Solution Approach 2:
The system performs self-diagnosis by comparing the actual voltage output with the expected enable signal state. The driving controller automatically detects the shutdown condition and triggers a wake-up sequence without user intervention, allowing the display device to self-recover from transient power supply issues.
2Length of moving object
If the display panel is made thinner to achieve lightness and thinness, then the aesthetic and portability requirements are met, but it becomes difficult to control the driving of power applied to the display panel, increasing the risk of short circuits and overheating
Solution Approach 1:
The patent replaces complex mechanical power control mechanisms with an electronic control system. The driving controller uses electrical signal monitoring and comparison to detect power supply anomalies, substituting physical thickness-based protection with intelligent electronic oversight that can precisely monitor and respond to power variations in thin panel designs.
Solution Approach 2:
The system monitors changes in voltage parameters and signal states to detect abnormal conditions. By continuously comparing the driving power source voltage with the power supply enable signal, the system can identify momentary shutdowns and trigger appropriate responses, maintaining reliable power control despite the reduced physical thickness of the display panel.
Data Source
AI summary
A driving apparatus of a display panel comprises a display panel for displaying an image according to an image signal; a DC-DC converter configured to output a voltage supplied from an external power source as a driving power source voltage for driving the display panel; a signal controller configured to generate a power supply enable signal for controlling an operation of the DC-DC converter and transfer it to the DC-DC converter; and a driving controller configured to determine an operation of the DC-DC converter according to a state of the driving power source voltage by receiving the driving power source voltage and comparing the received driving power source voltage with a pulse voltage of the power supply enable signal, and drive the DC-DC converter by adjusting the power supply enable signal in case the DC-DC converter is not operated.