Display device, method for controlling display device, and computer storage medium

A display device, comprising:

• a display panel, a first control assembly, a connection circuit board, and a second control assembly, wherein
• the display panel is connected to the first control assembly, one end of the connection circuit board is connected to the first control assembly, and another end of the connection circuit board is connected to the second control assembly:
• the connection circuit board comprises a board body, a test circuit and a signal transmission line that are disposed on the board body, wherein the test circuit comprises two first test lines extending in a first direction, first ends of the two first test lines are electrically connected and are disposed on a side of the connection circuit board proximate to the first control assembly, second ends of the two first test lines are disposed on a side of the connection circuit board proximate to the second control assembly and are connected to the second control assembly, the first direction being parallel to the signal transmission line;
• and the signal transmission line is configured to transmit signals between the first control assembly and the second control assembly:
• and
• the second control assembly is configured to:
• transmit a test signal to a second end of one first test line in the two first test lines and receive the test signal from a second end of another first test line in the two first test lines, determine a length of the connection circuit board in the first direction based on a transmitting moment and a receiving moment of the test signal, and determine a phase of a sampling clock based on the length of the connection circuit board in the first direction.