FFC Insertion Protection Circuit for Display Panel Short Circuits
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Solution Overview
Problem
During the manufacture of display panels, flexible flat cables (FFCs) are often inserted or plugged in either a power-off or power-on state, leading to potential pin connection disorders, short circuits, and irreversible damage due to omitted takt times for switching on/off, which affects yield and production efficiency.
Innovation Solution
An insertion and plugging protection device is introduced, comprising interface assemblies, connectors, a protection circuit, and a power source control circuit that generates a preset electric signal when connectors are connected, controlling the power source module to output a specific voltage, preventing pin connection disorders and short circuits by ensuring proper power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If FFC insertion and plugging operations are performed during display panel manufacture, then circuit detection can be completed, but pin connection disorders and short circuits may occur leading to irreversible damage
Solution Approach 1:
The protection circuit performs preliminary detection before power is applied to the display panel. The detection circuit checks whether the FFC connector is properly connected to the T-Con board before enabling power supply, preventing pin connection disorders and short circuits from occurring in the first place
Solution Approach 2:
A protection circuit is introduced as an intermediary component between the FFC connector and the power supply system. This protection circuit includes detection circuits that monitor connection status and control circuits that manage power supply timing, acting as a mediator to prevent direct damage to the display panel
2Reliability
If FFC is inserted or plugged in power-off state, then short circuit risk is reduced, but takt time for switching on and off power source may be omitted affecting production efficiency
Solution Approach 1:
The protection circuit implements feedback control by continuously monitoring the FFC connector status and automatically controlling the power supply timing. When the connector is detected as connected, the control circuit enables power supply; when disconnected, it cuts off power, creating a closed-loop system that eliminates manual takt time management
Solution Approach 2:
The protection circuit performs self-service by automatically detecting connector status and managing power supply without external intervention. The detection circuit and control circuit work autonomously to ensure proper power timing, freeing up production workflow without requiring manual power switching
3Productivity
If FFC is inserted or plugged in power-on state, then production efficiency is improved, but pin connection disorder and short circuit may occur causing irreversible damage
Solution Approach 1:
The protection circuit performs preliminary detection of connector status before power is applied to the display panel. The detection circuit checks whether the FFC connector is properly connected to the T-Con board before enabling power supply, preventing pin connection disorders and short circuits from occurring in the first place
Data Source
AI summary
An insertion and plugging protection device includes: at least one first interface assembly; at least one second interface assembly; at least one connector, a first end of each connector being adapted to a corresponding first interface assembly, and a second end of each connector being adapted to a corresponding second interface assembly; a protection circuit forming a protection loop, the protection loop being configured to generate a preset electric signal when the first end of each connector is connected to the corresponding first interface assembly and the second end of each connector is connected to the corresponding second interface assembly; and a power source control circuit connected to the protection circuit and a power source module of the display device, and configured to control the power source module to output a first preset power source voltage signal in accordance with the preset electric signal.