Display signal line connection detecting circuit

A detection circuit and display technology, applied in the detection circuit field, can solve problems such as looseness, abnormal display of the display, failure to eliminate problems in time, etc., and achieve the effect of convenient identification

Inactive Publication Date: 2016-10-19
HONG FU JIN PRECISION IND WUHAN CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 int

Method used

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  • Display signal line connection detecting circuit
  • Display signal line connection detecting circuit
  • Display signal line connection detecting circuit

Examples

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Example Embodiment

[0012] See figure 1 , The display signal line connection detection circuit of the present invention is used to detect whether the signal line 20 connected between a host 10 and a display 30 is well connected. The host 10 is provided with a first interface 11, and the display 30 is provided with a second The interface 31, the signal line 20 is connected between the first interface 11 and the second interface 31, so as to transmit a video signal between the host 10 and the display 30.

[0013] The host 10 also has a detection and indication circuit 40, and the detection and indication circuit 40 is connected to the first interface 11.

[0014] See figure 2 , Which is a schematic diagram when the first interface 11 and the second interface 12 are connected. In this embodiment, the first interface 11 and the second interface 12 are both VGA (video graphics array) interfaces, and the first interface 11 includes a The first display identification pin ID1 and a first ground pin GND1, the...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G06F11/273G06F11/32
CPCG06F13/385G06F13/4068
Inventor 黄开龙陈俊生
Owner HONG FU JIN PRECISION IND WUHAN CO LTD
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