CN201994522U

CN201994522U - Protection isolating device for DVI signal source

Info

Publication number: CN201994522U
Application number: CN2011200416714U
Authority: CN
Inventors: 张俊清
Original assignee: Beijing Peony Electronic Group Co Ltd
Current assignee: Beijing Peony Electronic Group Co Ltd
Priority date: 2010-12-17
Filing date: 2011-02-18
Publication date: 2011-09-28
Anticipated expiration: 2021-02-18

Abstract

The utility model provides a protection isolating device for a DVI (Digital Video Interactive) signal source. The protection isolating device comprises an input DVI interface part, a DVI signal distributing part and an output DVI interface part which are connected in sequence, wherein, the input DVI interface part is used for inputting signals sent by the DVI signal source to the protection isolating device; the DVI signal distributing part is used for dividing DVI signals into at least two channel signals; and the output DVI interface part is used for outputting the DVI signals to a next facility. The protection isolating device is simple to operate without settings, can divide one channel signal into at least two channel signals, can still work through other ports by separately protecting the DVI signal source after one port is damaged, and can also lower the loss cost greatly.

Description

A kind of protection spacer assembly of DVI signal source

Technical field

The utility model relates to a kind of protection spacer assembly, protection and spacer assembly in particularly a kind of DVI transmission course.

Background technology

DVI (Digital Visual Interface), i.e. digital visual interface.It is by DDWG(Digital Display working Group, and numeral shows working group) technology of a kind of high-speed transfer digital signal of invention, two kinds of different interface shapes of DVI-D and DVI-I are arranged.DVI-D has only digital interface, and DVI-I has digital and analog interface.

Because the interface of transmission cable may be introduced electrostatic charge in the plug process, produce instantaneous pressure sometimes, this voltage can be delivered to device interior, and related device is broken, and causes loss.Along with popularizing of ports such as DVI; ESD(Electro-Static discharge; static release) protection question is paid attention to by everybody gradually; but because the unsteadiness of instantaneous pressure; so can not all place hope in the esd protection measure, particularly in the occasion that often needs plug DVI interface.

The utility model content

Technical problem to be solved in the utility model provides a kind ofly isolates and the protection spacer assembly of the DVI signal source protected DVI signal source and interface thereof, DVI signal source and subordinate equipment can be isolated, and do the ESD protective treatment at each DVI interface.

The protection spacer assembly of a kind of DVI signal source of the utility model, it comprises input DVI interface section, DVI signal allocation part and the output DVI interface section that is linked in sequence; This device is imported with the signal that the DVI signal source sends in input DVI interface section; DVI signal allocation part is divided into two paths of signals at least with the DVI signal; Output DVI interface section outputs to next stage equipment with the DVI signal.

Further, the DVI signal allocation partly comprises control chip and at least one DVI signal allocation chip, and control chip is connected with each DVI signal allocation chip, and each DVI signal allocation chip is connected with input, output DVI interface section respectively.

Further, this device also comprises the esd protection part; Described input, output DVI interface section all are connected with the esd protection part, and this esd protection part is carried out the ESD protective treatment to input, output DVI interface section.

Further, esd protection partly is the esd protection chip.

The utility model need not to be provided with, and is simple to operate, one road DVI signal can be divided into two-way at least, both can still can use other port workings after a port damages by insulation blocking DVI signal source, also greatly reduces cost depletions.

Description of drawings

Fig. 1 is the circuit block diagram of the protection spacer assembly of a kind of DVI signal source of the utility model.

Embodiment

Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.

Fig. 1 is the protection spacer assembly of a kind of DVI signal source of the utility model, comprise input DVI interface section, DVI signal allocation part, output DVI interface section and esd protection part, DVI signal allocation part is connected with input, output DVI interface section respectively, and input, output DVI interface section all are connected with the esd protection part;

The DVI signal allocation partly comprises a control chip and a DVI signal allocation chip; wherein; control chip is that the model that Explore Microelectronics Inc. produces is the MCU chip (MicroControllerUnit of EPF011A; one chip microcomputer); DVI signal allocation chip is that the model that Explore Microelectronics Inc. produces is the signal allocation chip of EP9132; control chip EPF011A is connected with DVI signal allocation chip EP9132 by data wire; the signal that the DVI signal source sends is imported this device by input DVI interface section; is two-way DVI signal by DVI signal allocation chip EP9132 with the DVI signal allocation of importing; and output to subordinate equipment, input by the standard interface of output DVI interface section; output DVI has all taked the esd protection measure with the esd protection chip in the interface section.

The course of work of the present utility model is as follows:

1. control chip EPF011A is by detecting the HOT-PLUG(hot plug of DVI output interface) signal, judge that in the two-way output which inserted subordinate equipment;

2. control chip EPF011A is by the DDC(Display Data Channel of EP9132) read the EDID(Extended Display Identification Data Standard of subordinate equipment), wherein EDID comprises the basic parameter of display device, as information such as manufacturer, name of product, maximum row field frequency, supported resolution, EDID versions, and the signal format that decision sends according to EDID information;

3. if there is new receiving equipment to insert, new EDID will mix with old EDID, and before new EDID is ready, the hot plug of DVI signal source equipment will be forbidden several seconds;

4., then carry out HDCP(High-bandwidth Digital Content Protection, the HDCP technology if DVI signal source signal is encrypted) authentication.

The EP9132 chip that the utility model uses can be two-way with one road DVI signal allocation, its internal integration a HDCP encryption/decryption engine, meet DVI1.3b standard and HDCP1.1 standard, and compatible DVI1.0 standard.This chip uses the EEPROM of an outside to store reception/emission key of HDCP, makes things convenient for the replacing of key.

The utility model is exported the DVI signal allocation that receives by EP9132 to two paths of signals; make DVI signal source and receiving equipment isolate; avoid the influence of receiving equipment to signal source equipment; thereby protection DVI signal source; at each DVI input, output interface place the esd protection measure is arranged all simultaneously, also increased the stability in the signals transmission greatly.

DVI distribution portion among other embodiment of the utility model can be a control chip and a plurality of minutes distribution chips; control chip divides distribution chip to be connected with each; each divides distribution chip can be two paths of signals output with the DVI signal allocation; so this DVI distribution portion can be two paths of signals output at least with the DVI signal allocation; make DVI signal source and receiving equipment isolate; avoid the influence of receiving equipment to signal source equipment, thus protection DVI signal source.

The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. the protection spacer assembly of a DVI signal source is characterized in that, it comprises input DVI interface section, DVI signal allocation part and the output DVI interface section that is linked in sequence;

This device is imported with the signal that the DVI signal source sends in input DVI interface section;

DVI signal allocation part is divided into two paths of signals at least with the DVI signal;

Output DVI interface section outputs to next stage equipment with the DVI signal.

2. the protection spacer assembly of a kind of DVI signal source according to claim 1; it is characterized in that: described DVI signal allocation partly comprises control chip and at least one DVI signal allocation chip; control chip is connected with each DVI signal allocation chip, and each DVI signal allocation chip is connected with input, output DVI interface section respectively.

3. the protection spacer assembly of a kind of DVI signal source according to claim 1 and 2 is characterized in that: it also comprises the esd protection part; Described input, output DVI interface section all are connected with the esd protection part, and this esd protection part is carried out the ESD protective treatment to input, output DVI interface section.

4. the protection spacer assembly of a kind of DVI signal source according to claim 3 is characterized in that: described esd protection partly is the esd protection chip.