CN201118044Y

CN201118044Y - HDMI selector

Info

Publication number: CN201118044Y
Application number: CNU2007200581185U
Authority: CN
Inventors: 吴明村; 王志刚
Original assignee: ZHONGSHAN JESMAY ELECTRONIC CO Ltd
Current assignee: ZHONGSHAN JESMAY ELECTRONIC CO Ltd
Priority date: 2007-10-10
Filing date: 2007-10-10
Publication date: 2008-09-17
Anticipated expiration: 2017-10-10

Abstract

The utility model discloses an HDMI selector, consisting of a casing and a selecting steering circuit arranged in the casing, wherein the casing is provided with at least two HDMI signal input interfaces, a HDMI signal output interface and a selecting keypad; the at least two HDMI signal input interfaces, the HDMI signal output interface and the selecting keypad are all electrically connected with the selecting steering circuit; a power isolating circuit is also arranged in the casing; the power input end of the at least two HDMI signal input interfaces is connected with the power supply end of the selecting steering circuit through the power isolating circuit; an HDMI box joint can be served as the HDMI signal output interface, and an HDMI tool joint pin or an HDMI tool joint pin provided with an HDMI short string can be served as the HDMI signal output interface. The HDMI selector has the advantages that a power supplier can be left out, as well as an independent HDMI connecting line from the HDMI selector to an HDMI receiving device; an individual power supply is not needed; the HDMI selector is small and portable; the production cost is low.

Description

A kind of HDMI selector

Technical field:

The utility model relates to a kind of HDMI selector of the HDMI of selection source device input.

Background technology:

Along with the pursuit of people to the high-quality audio frequency and video, a kind of new digital transmission standard-HDMI (High Definition Multimedia Interface) " High Definition Multimedia " is called for short the HDMI audio ﹠ video equipment and progresses into family, has improved people's life widely.Because the HDMI source device in the family is more and more, and limited as the input interface of the HDTV of receiving equipment, therefore a kind of HDMI equipment of needs can be selected the HDMI source device, and a kind of so just equipment of HDMI selector.As shown in Figure 1 and Figure 2, traditional HDMI selector is a box-shaped device, there are selection key 11, infrared remote control window 12, mains switch 13 etc. in the front, there are some HDMI female joints 14 at the back side, be used for inputing or outputing of HDMI signal, and power supply port 15, power by the power supply unit that provides.General occupation mode is: by the HDMI connecting line connect input interface to HDMI source device, connection output interface to the HDMI receiving equipment, be HDTV, selection key or remote controller by the front are selected, and make one road input signal be transferred to HDTV by the HDMI selector.Traditional HDMI selector need be powered separately by power supply unit, and the HDMI selector uses inconvenience, the cost height to needing to connect an independently HDMI connecting line between the HDTV.

Summary of the invention:

The purpose of this utility model proposes a kind of independent power supply that need not, small volume and less weight, the HDMI selector that cost is low exactly.

For achieving the above object, a kind of HDMI selector of the utility model, comprise shell and place its interior selection control circuit, shell is provided with at least two HDMI signal input interfaces, HDMI signal output interface and selection key, these at least two HDMI signal input interfaces, HDMI signal output interface and selection key are electrically connected with the selection control circuit, also be provided with place in the shell from circuit, the power input of described at least two HDMI signal input interfaces connects the feeder ear of selecting control circuit through power isolation circuit.

Above-mentioned power isolation circuit can comprise at least two isolating diodes, and its positive pole connects the power input of corresponding at least two HDMI signal input interfaces respectively, and its negative pole is connected to each other the back and connects the feeder ear of selecting control circuit.By the buffer action of isolating diode, avoid interacting between the HDMI source device power supply.

In a kind of preferred implementation, above-mentioned HDMI signal input interface is the HDMI female joint of being located at shell one side, and the HDMI signal output interface is the HDMI male joint of being located at the shell opposite side.

In another kind of preferred implementation, above-mentioned HDMI signal input interface is the HDMI female joint, and the HDMI signal output interface is the HDMI male joint of band HDMI short-term.The HDMI female joint can be located at a side of shell, and the HDMI male joint of band HDMI short-term can be located at the opposite side of shell.

HDMI signal output interface of the present utility model is the HDMI male joint of HDMI male joint or band HDMI short-term, can directly insert HDMI receiving equipment, i.e. HDTV; The HDMI signal input interface is the HDMI female joint, can connect the HDMI source device by the HDMI connecting line.Selection control circuit in the shell is selected a conduct input at least two HDMI female joints, by a HDMI male joint HDMI signal is transferred to HDTV.

The utility model selects the power supply of control circuit to take from the power input of HDMI signal input interface, just takes from the power supply of HDMI source device, has saved power supply unit.The utility model HDMI signal output interface is selected the HDMI male joint of HDMI male joint or band HDMI short-term for use, then can save the independent HDMI connecting line of the utility model to HDTV.Reach and need not independent power supply, small volume and less weight, the purpose that cost is low.

Description of drawings:

Fig. 1 is the front stereo appearance figure of prior art HDMI selector;

Fig. 2 is the back side stereo appearance figure of Fig. 1;

Fig. 3 is the stereo appearance figure of the utility model embodiment;

Fig. 4 is the three-dimensional exploded view of Fig. 3;

Fig. 5 is the circuit block diagram of the utility model embodiment;

Fig. 6 is the circuit theory diagrams of the utility model embodiment power isolation circuit;

Embodiment:

The CONSTRUCTED SPECIFICATION of the utility model embodiment is described in detail in detail below in conjunction with accompanying drawing:

As Fig. 3, shown in Figure 4, the utility model embodiment, comprise shell 2, select control circuit and power isolation circuit, select control circuit and power isolation circuit to be located on the pcb board 3 that places in the shell 2, shell 2 is made up of loam cake 21 and lower cover 22, two HDMI female joints 4, the HDMI male joint 5 of a band HDMI short-term 51, a selection key 6 is electrically connected with selecting control circuit, the front end face of shell 2 is located in two HDMI female joints 4, the rear end face of shell 2 is located in the HDMI male joint 5 of a band HDMI short-term 51, be between loam cake 21 and the lower cover 22, the loam cake 21 of shell 2 is provided with a selection key 6.

As Fig. 5, shown in Figure 6, power input S1_5V, the S2_5V of two HDMI female joints 4 connects the feeder ear+5V that selects control circuit 32 through power isolation circuit 31.Power isolation circuit 31 comprises two isolating diode D1, D2, its positive pole connects power input S1_5V, the S2_5V of corresponding two HDMI female joints 4 respectively, its negative pole is connected to each other the back and connects the feeder ear+5V that selects control circuit 32, should+5V voltage can also obtain other required supply power voltage after the step-down of voltage stabilizing chip, as+3.3V ,+1.5V etc.

The HDMI female joint 4 of present embodiment is the HDMI joint of standard, and the faller gill of its afterbody directly is welded on the pcb board 3, and the HDMI signal with input is transferred to selection control circuit 32 on the one hand, gives from the power taking of HDMI source device on the other hand and selects control circuit 32.Select control circuit 32 by manually or automatically selecting a conduct input in two HDMI female joints 4.Manually refer to:,, select the signal input of one of them HDMI female joint 4 then by selection key 6 manual switchovers if two HDMI female joints 4 connect corresponding two HDMI source devices; Automatically refer to:,, all can select the signal input of this HDMI female joint automatically no matter then be that HDMI female joint if having only a HDMI female joint to connect the HDMI source device in two HDMI female joints.Select the HDMI signal after control circuit 32 will be selected to be transferred to HDMI receiving equipment, i.e. HDTV by the HDMI male joint 5 of being with HDMI short-term 51.Pressing plate 7, screw 8 and cableties 9 are used for fixing the HDMI short-term 51 of HDMI male joint 5.

The present embodiment outer appearnce is like the cable of a belt lacing, and small volume and less weight need not independent power supply, saves the independent HDMI connecting line of present embodiment to HDTV simultaneously, and is easy to use, saves cost.

Certainly, the HDMI male joint 5 of one of present embodiment band HDMI short-term 51 also can be with HDMI short-term 51, and the rear end face of shell 2 directly is located in HDMI male joint 5, is between loam cake 21 and the lower cover 22.

Claims

1, a kind of HDMI selector, comprise shell and place its interior selection control circuit, shell is provided with at least two HDMI signal input interfaces, HDMI signal output interface and selection key, these at least two HDMI signal input interfaces, HDMI signal output interface and selection key are electrically connected with the selection control circuit, it is characterized in that: also be provided with the power isolation circuit that places in the shell, the power input of described at least two HDMI signal input interfaces connects the feeder ear of selecting control circuit through power isolation circuit.

2, HDMI selector according to claim 1 is characterized in that: described at least two HDMI signal input interfaces are two to four.

3, HDMI selector according to claim 1, it is characterized in that: described power isolation circuit comprises at least two isolating diodes, its positive pole connects the power input of corresponding at least two HDMI signal input interfaces respectively, and its negative pole is connected to each other the back and connects the feeder ear of selecting control circuit.

4, HDMI selector according to claim 3 is characterized in that: described at least two HDMI signal input interfaces are two to four, and are corresponding, and at least two isolating diodes are two to four.

5, according to each described HDMI selector of claim 1 to 4, it is characterized in that: described HDMI signal input interface is the HDMI female joint of being located at shell one side, and the HDMI signal output interface is the HDMI male joint of being located at the shell opposite side.

6, according to each described HDMI selector of claim 1 to 4, it is characterized in that: described HDMI signal input interface is the HDMI female joint, and the HDMI signal output interface is the HDMI male joint of band HDMI short-term.

7, HDMI selector according to claim 6 is characterized in that: a side of shell is located in described HDMI female joint, and the opposite side of shell is located in the HDMI male joint of band HDMI short-term.