Display Panel Backup Voltage During Power Converter Failure
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Solution Overview
Problem
Display panels in vehicles face safety risks due to power converter malfunctions, which can cause shutdowns and affect driver safety, as existing power supply devices lack effective mechanisms to maintain operation during abnormal conditions.
Innovation Solution
A power supply device with a sub-power unit that supplies a sub-driving voltage when the primary power converter operates abnormally, and includes control signals to restart the converter, ensuring continuous display without shutdown, even if the primary power converter fails to resume normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power converter supplies driving voltage to a display panel, then the display panel can operate normally, but when the power converter operates abnormally, the display panel must be shutdown to prevent malfunction
Solution Approach 1:
The patent applies preliminary action by providing a sub-power unit that is pre-configured to supply sub-driving voltage to the display panel. When the power converter operates abnormally, this pre-prepared sub-power unit can immediately take over without requiring system shutdown, thus preventing malfunction while maintaining display operation.
Solution Approach 2:
The sub-power unit acts as an intermediary between the abnormal power converter and the display panel. It receives control signals from the power converter indicating abnormal operation and provides a backup driving voltage through which the display panel can continue operating without direct connection to the faulty power converter.
2Reliability
If a sub-power unit supplies sub-driving voltage during abnormal operation, then display panel shutdown is prevented, but the system complexity increases
Solution Approach 1:
The sub-power unit is designed with multi-functionality to reduce overall system complexity. It can supply sub-driving voltage during abnormal operation, receive control signals from the power converter, and potentially restart the power converter by transmitting restart control signals. This multi-functional design consolidates several functions into a single component rather than requiring separate dedicated components for each function.
Solution Approach 2:
The patent merges the backup power supply function with the control signal processing function into a single sub-power unit. Rather than having a separate backup power source and separate control circuitry, the sub-power unit integrates both capabilities, reducing the number of discrete components and simplifying the overall system architecture.
3Object-affected harmful factors
If the power converter stops supplying driving voltage during abnormal operation, then display panel safety is maintained, but image display is interrupted
Solution Approach 1:
The patent applies parameter changes by switching from the primary driving voltage supplied by the power converter to a sub-driving voltage supplied by the sub-power unit during abnormal operation. This parameter change in voltage source allows the display panel to maintain operation with potentially different voltage characteristics while avoiding the harmful effects of the abnormal power converter, thus preserving both safety and continuity.
Data Source
AI summary
A power supply may include a power converter configured to supply a driving voltage to a display panel. The power converter may also include a sub-power unit configured to supply a sub-driving voltage to the display panel when the power converter operates abnormally.