Power Voltage Generator Short Detection via Charge Sharing
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Solution Overview
Problem
Display apparatuses face safety and reliability issues due to undetected shorts between signal transmitting lines, which can lead to heat or fire generation.
Innovation Solution
A power voltage generator with a voltage sensor and power breaker that detects voltage differences between charge sharing periods of gate clock signals to disconnect power when a short is sensed, enhancing safety and reliability by sensitive detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional short detection methods are used, then device complexity is reduced, but measurement precision deteriorates leading to undetected shorts
Solution Approach 1:
The patent introduces a voltage sensor as an intermediary component that indirectly detects shorts by measuring voltage differences during charge sharing periods, rather than directly detecting current or resistance. This mediator approach enables sensitive short detection while maintaining relatively simple device architecture.
Solution Approach 2:
The patent changes the detection parameter from direct current or resistance measurement to voltage measurement during specific charge sharing periods. By monitoring voltage differences between signal lines during controlled charge sharing, the system achieves high detection sensitivity without complex detection circuits.
2Reliability
If continuous monitoring is implemented, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring by detecting voltage differences only during specific charge sharing periods rather than continuous monitoring. The voltage sensor operates intermittently during these defined periods, achieving reliable short detection while minimizing energy consumption through periodic rather than continuous operation.
3Measurement precision
If voltage sensing during charge sharing periods is implemented, then short detection sensitivity is improved, but device complexity increases
Solution Approach 1:
The voltage sensor serves multiple functions: it monitors voltage during charge sharing periods for short detection, and can potentially be used for other voltage monitoring purposes. This multi-functionality justifies the added component while providing comprehensive detection capability without requiring separate dedicated circuits for each function.
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
Prevents heat or fire by sensitively detecting shorts between gate clock signal lines, thereby enhancing the safety and reliability of the display apparatus.
Implementation Method 1
the voltage sensor is configured to sense a first voltage in a first charge sharing period of a gate clock signal and a second voltage in a second charge sharing period of the gate clock signal
Data Source
AI summary
A power voltage generator includes a voltage sensor and a power controller. The voltage sensor is configured to sense a first voltage in a first charge sharing period of a gate clock signal and a second voltage in a second charge sharing period of the gate clock signal. The power breaker is configured to disconnect a power based on the first voltage and the second voltage.