Hardware Signal details of LED TV Panels STV, OE, CKV, VGL, VGH, and COF

Below is the full and brief explanation of the signals and technologies STV, OE, CKV, VGL, VGH, and COF, which are commonly used in LED/LCD TV T-Con boards and panels​

STV – Start Vertical

Instructs the panel to start driving from the vertical direction in the scanning process.

It provides a trigger pulse, which starts the scan in the gate driver circuit.

CKV – Clock Vertical

Provides a clock signal to the gate driver.

There is a CKV pulse for each gate line, which activates the pixels on the panel.

OE – Output Enable

Used to enable/disable the output of the gate driver.

Usually helps in controlling the on/off of the pixel drive.

VGH – Voltage Gate High

A high voltage supply (usually +20V or more) used in the gate driver circuit.

It is used to create the ON condition of the gate line.

VGL – Voltage Gate Low

Low voltage supply of the gate drive (usually -6V to -10V).

It is used to create the OFF condition of the gate line.

COF – Chip On Film

This is a technology where the IC is directly connected to a flexible film.

T-Con and panel are used as gate/source drivers. This makes the TV thin and reliable.

These signals and voltages are essential for the proper operation of the LCD/LED display panel. Usually, they are sent from the T-Con board to the COF driver IC, which controls the gate and source lines of the panel.

Thank you Al Ameen Electronics

 

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