Overcurrent Protection Circuit for Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing overcurrent protection solutions for clock signal generation circuits in display devices require a large number of level switching circuits, which is space-inefficient.
Innovation Solution
An overcurrent protection circuit that utilizes N clock signal generation units, N first overcurrent detection circuits, N second overcurrent detection circuits, signal generation circuits, and two level switching circuits, along with a control circuit to provide overcurrent protection by switching control signals and stopping voltage outputs when excessive current is detected, thereby reducing the need for multiple level switching circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large quantity of level switching circuits are adopted for overcurrent protection, then overcurrent protection function is achieved, but circuit area increases
Solution Approach 1:
The patent merges the overcurrent protection function into the existing clock signal generation circuit by utilizing the output control module that already exists for clock signal output. The overcurrent detection circuits are integrated with the clock signal generation units, and the protection function is implemented through signal generation circuits that work with the existing level switching circuits, rather than adding separate dedicated overcurrent protection circuits.
Solution Approach 2:
The output control module in the clock signal generation circuit is designed to serve dual purposes: controlling clock signal output and implementing overcurrent protection. The level switching circuits are used both for normal clock signal generation and for overcurrent protection control, making the circuit components multi-functional and eliminating the need for separate dedicated protection circuits.
2Reliability
If multiple level switching circuits are used for overcurrent protection, then protection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the overcurrent protection control logic with the existing clock signal generation control structure. The signal generation circuits use the same control signals and control pathways as the normal operation, integrating protection functionality into the existing control framework rather than creating separate complex protection control paths.
Solution Approach 2:
The clock signal generation circuit performs self-protection by using its own output control module and level switching circuits to detect and respond to overcurrent conditions. The circuit monitors its own output current through integrated detection circuits and automatically controls its own shutdown through the existing control pathways, eliminating the need for external protection circuits.
Data Source
AI summary
The present disclosure provides an overcurrent protection circuit, an overcurrent protection method, a clock signal generation circuit and a display device. The overcurrent protection circuit includes N first overcurrent detection circuits, N second overcurrent detection circuits, a first signal generation circuit, a second signal generation circuit, a first level switching circuit, a second level switching circuit and a control circuit. The first signal generation circuit is configured to output a first control signal to the first level switching circuit upon the receipt of a first overcurrent indication signal. The second signal generation circuit is configured to output a second control signal to the second level switching circuit upon the receipt of a second overcurrent indication signal. The control circuit is configured to provide an OFF control signal to an nth output control module after a predetermined time period upon the receipt of a third control signal and/or a fourth control signal, where N is a positive integer, and n is a positive integer smaller than or equal to N.