Circuit board and display apparatus

A circuit board comprising:

• a connector configured to connect an onboard system of the circuit board to an external system, wherein the connector is provided with a first ground terminal and connected to a first ground;
• and
• a screw hole connected to the first ground to discharge static electricity through the first ground, wherein the circuit board is provided with at least one screw hole, and the screw hole is disposed at a corner position of the circuit board,
• wherein the first ground is isolated from a ground wire of the circuit board,
• wherein the ground wire is provided with a plurality of second ground terminals, one side of the screw hole and one side of the connector are respectively provided with the second ground terminal, and the second ground terminal is connected to the first ground through a link resistance, wherein the screw hole and the connector are indirectly connected to the second ground terminals through the first ground,
• wherein the first ground is a laminated conductive structure disposed in the circuit board, and extends in a straight line at an edge position of the circuit board, and the laminated conductive structure of the first ground has a width of more than 40 mils, and
• wherein the circuit board is a two-layer circuit board comprising a top circuit board and a bottom circuit board, a first ground wire on the top circuit board and a second ground wire on the bottom circuit board form a grid-like frame shape, the first ground wire on the top circuit board and the second ground wire on the bottom circuit board are connected to each other through a via hole on the circuit board, and the via hole is located on a location where a projection of the first ground wire on the top circuit board coincides with a projection of the second ground wire on the bottom circuit board.