Interface circuit and display device

A display device, comprising a main board, a logic board, and an interface circuit, wherein the interface circuit comprises:

• a video transmission interface, an Inter-Integrated Circuit (IIC) communication interface, and an isolation circuit,
• wherein the video transmission interface comprises a plurality of empty pins, and video signal transmission is performed between the main board and the logic board through the video transmission interface;
• the plurality of empty pins are defined as the IIC communication interface, and IIC signal transmission is performed between the main board and the logic board through the IIC communication interface;
• and
• the isolation circuit is electrically connected to the IIC communication interface;
• wherein the IIC communication interface comprises a write protection pin, a serial clock pin, and a serial data pin, the isolation circuit comprises a first isolation circuit and a second isolation circuit, the write protection pin and the serial data pin are electrically connected to the first isolation circuit, and the write protection pin and the serial clock pin are electrically connected to the second isolation circuit;
• wherein the write protection pin comprises a first level state and a second level state, wherein when the write protection pin is in the first level state, the main board and the logic board are in an IIC isolation state;
• when the write protection pin is in the second level state, the main board and the logic board are in an IIC communication state.

An interface circuit, for use in a display device, the display device comprising a main board and a logic board, the interface circuit comprising a video transmission interface, an Inter-Integrated Circuit (IIC) communication interface, and an isolation circuit,

• wherein the video transmission interface comprises a plurality of empty pins, a plurality of first pins, a power supply terminal, and a video transmission terminal, and video signal transmission is performed between the main board and the logic board through the video transmission interface, wherein the plurality of empty pins are arranged adjacent to each other, and the first pins are arranged on two sides of the plurality of empty pins arranged adjacent to each other, the first pins are grounded, and the first pins and the empty pins are arranged between the power supply terminal and the video transmission terminal;
• the plurality of empty pins are defined as the IIC communication interface, and IIC signal transmission is performed between the main board and the logic board through the IIC communication interface;
• the isolation circuit is electrically connected to the IIC communication interface;
• wherein the logic board comprises a power management chip and a logic processing chip, and the power supply terminal is electrically connected to the power management chip;
• and
• the video transmission terminal is electrically connected to the logic processing chip.