Display Panel Overvoltage Circuit With Low-Loss Switch Isolation
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Solution Overview
Problem
Existing technologies face challenges in stabilizing power supply voltage to integrated circuits (ICs) and protecting them from overvoltage, often resulting in voltage loss and potential damage.
Innovation Solution
An overvoltage protection circuit with a dual-line configuration, utilizing a first control switch and a protection module to disconnect the voltage input and output when the power supply voltage exceeds a preset threshold, and a voltage conversion unit to manage switch states, preventing voltage loss and ensuring stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If overvoltage protection is activated to protect ICs from high voltage, then IC safety is improved, but voltage loss occurs and voltage stability deteriorates
Solution Approach 1:
The patent introduces a protection module as an intermediary between the voltage input end and voltage output end. This module includes a voltage conversion unit and a switch unit that work together to monitor voltage levels and control the first control switch. When overvoltage is detected, the protection module activates the switch to disconnect the circuit, protecting the IC while minimizing voltage loss during normal operation.
Solution Approach 2:
The protection module performs preliminary voltage detection and preparation before overvoltage damage can occur. The voltage conversion unit continuously monitors the voltage level, and when it approaches the threshold, the system is already prepared to activate the first control switch through the switch unit, preventing damage before it happens rather than reacting after damage occurs.
2Stability of the object's composition
If voltage stabilization measures are implemented, then voltage stability is improved, but circuit complexity increases
Solution Approach 1:
The protection module is segmented into distinct functional units: a voltage conversion unit for voltage detection and conversion, and a switch unit for controlling the first control switch. This segmentation allows each unit to perform its specific function efficiently while keeping the overall circuit design modular and manageable, reducing the perceived complexity through clear functional separation.
Solution Approach 2:
The protection module serves multiple functions within a single integrated structure. It can detect voltage levels, convert voltage signals for comparison, control the first control switch state, and provide overvoltage protection all through one module. This multi-functionality reduces the need for separate components, thereby managing circuit complexity while achieving comprehensive voltage stabilization.
Data Source
AI summary
A circuit includes a voltage input end, a voltage output end, a first control switch and a protection module; the voltage input end is configured to be applied with a power supply voltage; the voltage input end and the voltage output end are connected via a first line; the first control switch is connected between the voltage input end and the voltage output end and located on the first line; the protection module is connected between the voltage input end and the voltage output end and is located on a second line connected in parallel with the first line, the protection module is connected to the first control switch and configured to control the first control switch to turn off to be disconnected from the first line when the power supply voltage is greater than a preset voltage. The circuit has an overvoltage protection function.