Display signal line connection detecting circuit

Abstract

A display signal line connection detecting circuit is used for detecting whether the first interface of a host is well connected with the second interface of a display or not; the first interface is provided with a first display ID pin; the first display ID pin is earthed when the first and second interfaces are well connected, and not earthed when the first and second interfaces are not well connected; the display signal line connection detecting circuit comprises a control chip, a switch, and a LED; the control chip comprises a detection pin and a control pin; the detection pin is connected with the first display ID pin; the control pin controls the switch to open and close; the LED is connected in series with the switch; when the detection pin detects the first display ID pin is in high level, the control pin can open the switch, thus allowing the LED to light up for indication.

Description

technical field [0001] The invention relates to a detection circuit, especially a circuit for detecting the connection of display signal lines. Background technique [0002] A desktop computer generally includes a host computer and a monitor. The host computer transmits video signals to the monitor through a signal cable, but there may be looseness between the signal cable connecting the host computer and the monitor and the interface of the computer or monitor, which may cause the monitor to malfunction. According to the display, users are usually difficult to perceive the looseness of the signal line, which leads to the inability to troubleshoot the problem in time and affects the normal use of the computer. Contents of the invention [0003] In view of the above, it is necessary to provide a circuit that can detect and indicate the connection of signal lines. [0004] A display signal line connection detection circuit, used to detect whether a first interface of a host...

AI Technical Summary

Problems solved by technology

[0002] A desktop computer generally includes a host computer and a monitor. The host computer transmits video signals to the monitor through a signal cable, but there may be looseness between the signal cable connecting the host computer and the monitor and the interface of the computer or monitor, which may cause the monitor to malfunction. It is often difficult for users to notice the looseness of the signal line, which will lead to the failure to troubleshoot the problem in time and affect the normal use of the computer.

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