The display cable connects to the display panel at one end and communicates with the motherboard at the other. It is typically made of flexible printed circuit board (FPC), and its connection to the motherboard is responsible for transmitting signals and power to ensure proper screen display.
The signal terminals of the ribbon cable mainly serve the following functions:
1. Signal transmission: Transmits the display signal data (such as RGB, LVDS, MIPI, etc.) output by the main control chip to the TFT driver IC.
2. Power supply: Provides operating voltage for LCD driver chips, backlight driver circuits, etc.
3. Control interface: such as reset signal, backlight switch signal, touch signal, etc.
The ribbon cable bonding mainly serves the following functions:
1. Bond the precision wiring area of the ribbon cable to the TFT panel onto the glass substrate.
Common definitions for output terminals:
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signal
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Description
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VCC
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Power supply (3.3V / 1.8V)
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GND
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ground wire
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CLK+ / CLK−
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Clock signal
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LED−
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Backlight power supply negative terminal
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LED +
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Backlight power supply positive terminal
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