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A hot plug detection and regulation circuit

A hot-swap, circuit technology, applied in the direction of detecting faulty computer hardware, etc., can solve the problems of display timing errors, black screen, unable to connect normally, etc., to avoid timing errors and solve the effect of black screen

Active Publication Date: 2019-01-29
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is completed in order to solve the above-mentioned deficiencies in the prior art. The purpose of the present invention is to propose a hot-swap detection and adjustment circuit, which prevents the hot-swap detection signal HPD from flipping to high before the data line SDA signal. Level and sudden changes, etc., thus solving the problem of a black screen due to the timing error of the connection between the display and the host computer

Method used

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  • A hot plug detection and regulation circuit
  • A hot plug detection and regulation circuit
  • A hot plug detection and regulation circuit

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Experimental program
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Embodiment 1

[0040] image 3 A structural diagram of a hot plug detection and adjustment circuit provided in the first embodiment of the present invention is given.

[0041] Such as image 3 A hot plug detection and adjustment circuit provided in the first embodiment includes: a connector 100, a detection module 200, and a communication protocol module 300.

[0042] Wherein, the detection module 200 includes a signal detection sub-module 210. The input ends of the signal detection sub-module 210 are respectively electrically connected to the first output end of the display 400, the first output end and the second output end of the communication protocol module 300, It receives the hot plug detection signal sent by the display 400 and the first communication signal and the second communication signal sent by the communication protocol module.

[0043] It should be pointed out that the detection sub-module 210 only plays a role in transmitting the hot plug detection signal, and makes logical judgme...

Embodiment 2

[0052] Figure 4 A structural diagram of a detection sub-module in a hot-plug detection and adjustment circuit provided in the second embodiment of the present invention is given. Such as Figure 4 As shown, the hot plug detection and adjustment circuit provided in the second embodiment of the present invention is based on the first embodiment, and the signal detection sub-module 210 includes: a first voltage comparison sub-circuit 211, a timing sub-circuit 212, and a first switch Sub-circuit 213;

[0053] Wherein, the first input terminal of the first voltage comparison sub-circuit 211 is electrically connected to the first output terminal of the communication protocol module 300 for receiving the first communication signal;

[0054] The second input terminal of the first voltage comparison sub-circuit 211 is electrically connected to the second output terminal of the communication protocol module for receiving the second communication signal;

[0055] The first voltage comparison ...

Embodiment 3

[0066] Figure 5 It is a structural diagram of a hot plug detection and adjustment circuit provided in the third embodiment of the present invention.

[0067] by Figure 5 As shown, the detection module 200 in a hot plug detection and adjustment circuit may further include a control sub-module 220;

[0068] Wherein, the first input terminal of the control sub-module 220 is electrically connected with the first output terminal of the display 400 for receiving hot plug detection signals; the second input terminal is electrically connected with the second output terminal of the display 400 for receiving internal Start power signal;

[0069] The output end of the control sub-module 220 is electrically connected to the input end of the connector 100, and is used to control the hot-plug detection output of the sub-module 220 when the hot-plug detection signal and the internal start power signal are both at high level. The signal is sent to the connector 100.

[0070] The control sub-module...

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Abstract

The invention discloses an HPD (Hot Plug Detect) regulating circuit, which comprises a connector, a detection module and a communication protocol module, wherein the detection module comprises a signal detection sub module; the input end of the signal detection sub module is electrically connected with the first output end of a display, and the first output end and the second output end of the communication protocol module, and is used for receiving an HPD signal sent by the display and a first communication signal and a second communication signal which are sent by the communication protocol module; and the output end of the signal detection sub module is electrically connected with the input end of the connector and is used for sending the HPD signal to the connector when detecting that the first communication signal and the second communication signal simultaneously maintain a high level for a period of time exceeding the preset time. The HPD detection regulating circuit has the advantages that the time sequence error of the connection between the display and a host is avoided, so that the problem of black screen occurrence in the connection process of the display and the host is solved.

Description

Technical field [0001] The invention relates to the technical field of multimedia interface detection, in particular to a hot plug detection and adjustment circuit. Background technique [0002] With the development of large-scale integrated circuit technology, integrated circuit bus (inter-integrated Circuit, I 2 C) More and more applications are used in the design of large-scale integrated circuits to simplify the hardware design of the system. I 2 The C bus has two signal lines, one is a bidirectional data line SDA, and the other is a clock line SCL. All received I 2 The serial data lines SDA on the C bus devices are all connected to the SDA of the bus, and the clock lines SCL of each device are connected to the SCL of the bus. [0003] Hot Plug Detect (Hot Plug Detect, HPD) is to send the detection signal output by the display to the host. When the display is connected to or disconnected from the host system through the interface, the host can use the process of receiving the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/22
Inventor 常琳张晓娥杨德林
Owner KUSN INFOVISION OPTOELECTRONICS