CN201039354Y - A low-power consumption circuit - Google Patents
A low-power consumption circuit Download PDFInfo
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- CN201039354Y CN201039354Y CNU2007200216355U CN200720021635U CN201039354Y CN 201039354 Y CN201039354 Y CN 201039354Y CN U2007200216355 U CNU2007200216355 U CN U2007200216355U CN 200720021635 U CN200720021635 U CN 200720021635U CN 201039354 Y CN201039354 Y CN 201039354Y
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Abstract
The utility model discloses a circuit with lower power consumption, comprising an external signal source interface, a power circuit, a main process chip, a signal processing module for processing signals input by the external signal source device and a power switch circuit, wherein, the input end of the power switch circuit is connected with a DC power source, the control end receives control signal from the main process chip and the output end is connected with the power supply end of the signal processing module. The input end of the main process chip receives high level signal and low level signal from the power end of the outer signal source interface. When the main process chip detects that high level signal is inputted in the input end and the signal source channel is switched into the interface, the main process chip controls the input end to be communicated with the output end of the power switch circuit. The utility model controls the working of multi-way switch circuits of the interface circuit and the signal processing module through controlling the receiving device only when the signals are plugged in and the signal source channel is switched to the interface. The utility model solves the problem of resource waste efficiently.
Description
Technical field
The utility model belongs to the energy-saving design technical field, specifically, relates to a kind of low-power consumption energy-saving circuit design that is applied to the signal source interface circuit.
Background technology
Along with developing rapidly of liquid crystal TV set, the continuous lifting of market demands, multi-functional many interfaces have become the indispensability of liquid crystal TV set, and in this case, the advantage of HDMI interface appears suddenly out.HDMI is the high definition digital multimedia interface, and the data transfer bandwidth up to 5Gbps can be provided, and, only need a HDMI line just can transmit video-audio signal simultaneously, and unlike needing many wire rods to connect now.Simultaneously, owing to need not to carry out D/A or mould/number conversion, can obtain higher Voice ﹠ Video transmission quality.For the consumer, the HDMI technology can not only provide image quality clearly, and has simplified the installation of household audio and video system greatly.All be provided with the HDMI interface more than 2 on the general high terminal, for a plurality of interfaces, the switch that just must relate to signal source switches.Present way all is to make switch circuit part and HDMI signal processing circuit part in running order always, and the waste that can bring resource undoubtedly like this, the environmental protection television theory of advocating with the New Times runs in the opposite direction.
The utility model content
The utility model is in order to solve signal source interface treatment circuit in running order always energy waste problem that causes when complete machine moves in the prior art, a kind of novel low consumption circuit is provided, manage by power supply signal source interface treatment circuit, only just controlling described interface signal treatment circuit when complete machine switches to this signal source interface works on power, thereby the power consumption of effectively reducing has been saved electric energy.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of low consumption circuit, the signal processing module and the power switch circuit that comprise external signal source interface, power circuit, main process chip, the signal of outside signal source equipment input is handled; Wherein, the input of described power switch circuit connects DC power supply, and control end receives the control signal that main process chip is sent, and output connects the feeder ear of described signal processing module; The input of described main process chip receives the high-low level signal that the power end of described external signal source interface sends, and is communicated with output detecting the input of controlling described power switch circuit when its input has high level input and signal source passage to switch to described interface.
Wherein, described DC power supply can be provided by the direct voltage of importing by the power end of described external signal source interface.
Further, described external signal source interface includes multichannel, in order to reach the gating purpose, in described power switch circuit, include a multi-channel switch chip, the multi-channel input of described multi-channel switch chip respectively with the corresponding connection of power end of multichannel external signal source interface, the channel selecting termination is received the control signal that described main process chip is sent, and output connects the feeder ear of described signal processing module.
Wherein, the control signal that described main process chip is sent is the channel selecting control signal, by the GPIO mouth output of main process chip.
In order further to reach the purpose that reduces power consumption, the utility model has also carried out energy-saving design to the multichannel commutation circuit that the signal terminal that is used for multichannel external signal source interface is selected to switch; Many groups of alternative passages of described multichannel commutation circuit respectively with the corresponding connection of signal transmission terminal of multichannel external signal source interface, its channel selecting termination is received the control signal that main process chip is sent, and common port connects the corresponding signal terminal of described signal processing module; In order to make described multichannel commutation circuit only switch to the signal source passage on this interface and this interface has the signal input time to work on power the user, the output that the power end of described multichannel commutation circuit is connected described power switch circuit, promptly, reach energy saving purposes by the operating time of the described multichannel commutation circuit of control.
Wherein, the DC power supply of connection power switch circuit input is provided by power circuit.
Specifically, in described power switch circuit, also include a NPN type triode and a P-channel field-effect transistor (PEFT) pipe, the base stage of described NPN type triode connects the control signal output ends of described main process chip, grounded emitter, collector electrode connects the grid of described P-channel field-effect transistor (PEFT) pipe on the one hand through first divider resistance, connects the output of described power circuit on the other hand by second divider resistance; The source electrode of described P-channel field-effect transistor (PEFT) pipe connects the output of described power circuit, and drain electrode connects the power end of described multichannel commutation circuit.
Wherein, the control signal that described main process chip is sent is a switch controlling signal, by its another road GPIO mouth output.
Again further, described external signal source interface is the HDMI interface, and its hot-swappable detection signal end connects a handshake gating circuit; The control end of described handshake gating circuit receives the control signal that described main process chip is sent, and the gating passage connects the power end and the hot-swappable detection signal end of described HDMI interface respectively; When the power end that detects described HDMI interface in main process chip has the high level input, control described handshake gating circuit action, be communicated with power end and its hot-swappable detection signal end of described HDMI interface.
Specifically, in described handshake gating circuit, include a NPN type triode, the base stage of described triode receives the control signal that described main process chip is sent, grounded emitter, collector electrode connects the hot-swappable detection signal end of described HDMI interface on the one hand, connects the power end of described HDMI interface on the other hand by resistance.
Compared with prior art, advantage of the present utility model and good effect are: the utility model designs by the peripheral circuit to the outside source interface, changed multichannel commutation circuit and signal processing module in the outside source interface circuit in the past are in power supply state always after the receiving equipment operation mode of operation, but only there is being signal source equipment to insert, and when the signal source passage of receiving equipment switches on this interface, its multichannel commutation circuit and signal processing module be normal power supply work, thereby efficiently solve the problem of the wasting of resources, save electric energy, realized the reliable switching controls of external signal source channels.
Description of drawings
Fig. 1 is the port definition and the handshake gating circuit schematic diagram of HDMI interface in the utility model;
Fig. 2 is wherein a part of circuit theory diagrams of power switch circuit in the utility model;
Fig. 3 is other a part of circuit theory diagrams of power switch circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
The utility model is in order to reach the energy-saving and cost-reducing purpose of external signal source interface and signal processing circuit thereof, in described interface circuit, be provided with a power switch circuit, the input of described power switch circuit connects a direct current power supply, control end receives the control signal that main process chip is sent, and output connects the feeder ear of described signal processing module; The input of described main process chip receives the high-low level signal that the power end of described external signal source interface sends, and is communicated with output detecting the input of controlling described power switch circuit when its input has high level input and signal source passage to switch to described interface.The utility model is by changing the on off state of described power switch circuit, and then realize the power supply of outside source interface circuit is controlled, make its only energising work when the signal source passage that signal source equipment insertion and receiving equipment are arranged switches on this interface, thereby not only realized reliable control to the outside source interface, and reduced the power consumption of receiving equipment, improved the complete machine quality.
In the receiving equipment that only is provided with one tunnel external signal source interface, described power switch circuit can simply adopt a switch element (as parts such as triode, field effect transistor, relays) to realize.With NPN type triode is example, and the base stage of described triode receives the control signal that main process chip is sent, and collector electrode connects described DC power supply, and emitter connects the feeder ear of described signal processing module.Detect that signal source equipment inserts and the signal source passage of receiving equipment when having switched on this interface at receiving equipment, send high-level control signal and make the triode conducting, thereby control described DC power supply is the signal processing module power supply, finishes the normal process output of signal.Certainly, described DC power supply equally also can adopt the direct voltage of the feeder ear output of described external signal source interface to provide.
When on receiving equipment, being provided with multichannel external signal source interface simultaneously, in order further to reach energy saving purposes, the working power that is used for multipath signal source is carried out the multichannel commutation circuit that gating switches in the interface circuit is carried out switch control, make it detect that signal source inserts and the signal source passage of receiving equipment works on power when having switched on this interface, to reach the purpose of energy savings at receiving equipment.
Embodiment one, is concrete annexation and the operation principle of setting forth described low consumption circuit of example with two-way HDMI interface below.
Fig. 1 is the port definition of one road HDMI interface P15 wherein, its 18 pin is the power end of HDMI interface P15, by 18 pin inputs+5V DC power supply PWR5V-1 provides by the external signal source device, do not rely on the operating state of receiving equipment, connect the input of main process chip in the receiving equipment, realize the detection whether main process chip is inserted outside signal source equipment.Described input can adopt wherein one road GPIO cause for gossip of main process chip existing.
Include a multi-channel switch chip in power switch circuit of the present utility model, can select model as shown in Figure 3 is the two-way switch chip U36 realization of TS5A3157DCKR.Two-way input N0, the NC of described two-way switch chip U36 is connected the power end of described two-way HDMI interface, i.e. 18 pin respectively through resistance R 325, R326 and switching diode; Channel selecting end IN receives the control signal that described main process chip is sent by the GPIO_16 mouth of the main process chip of resistance R 324 connections; Output COM connects the feeder ear of signal processing module.Described signal processing module can be independent signal processing circuit, can also be integrated in the described main process chip, and the utility model does not limit this.
When the HDMI signal generating apparatus is connected on the receiving equipment, 18 pin input+5V direct voltage PWR5V_1 or PWR5V_0 by its HDMI interface, the GPIO mouth of connected main process chip is put height, then main process chip has been judged as the HDMI signal and has inserted, simultaneously, work as EDID, HDCP all connects when errorless, main process chip is with the hot-swappable detection signal end HOTPLU of HDMI interface, i.e. 19 pin electric position height, to described HDMI signal generating apparatus heat outputting plug detection signal, set up the communication path between HDMI signal generating apparatus and the receiving equipment, control HDMI signal generating apparatus is exported audio-video signal to receiving equipment.
Between described main process chip and HDMI interface, be connected with a handshake gating circuit, the control end of described handshake gating circuit receives the control signal that main process chip is sent, and the gating passage connects the power end (18 pin) and the hot-swappable detection signal end (19 pin) of described HDMI interface respectively; When the power end (18 pin) that detects described HDMI interface in main process chip has the high level input, control described handshake gating circuit action, be communicated with 18 pin and 19 pin of described HDMI interface.
Among Fig. 1, adopt a NPN type triode Q22 to cooperate simple peripheral circuit to form described handshake gating circuit.Illustrated GPIO_2_1 is wherein one road GPIO mouth of main process chip, the heat outputting plug detects control signal, the base stage that connects described triode Q22 through series resistance R372, the grounded emitter of described triode Q22, collector electrode connects 19 pin of described HDMI interface P15 on the one hand, and, connect 18 pin of described HDMI interface P15 on the other hand by divider resistance R364 through divider resistance R363 ground connection.
Insert when main process chip has been judged as the HDMI signal, EDID, HDCP all connect when errorless simultaneously, by its GPIO_2_1 mouth output low level signal, triode Q22 ends, from the input of 18 pin of HDMI interface P15+the 5V direct voltage to the hot-swappable detection signal of its 19 pin output high level, controls differential signal end RX1_0, RX1_0B, RX1_1, RX1_1B, RX1_2, RX1_2B, RX1C, the RX1CB of outside HDMI signal generating apparatus by interface P15 and exports audio-video signal to receiving equipment under the effect of divider resistance R364, R363.At this moment, main process chip is judged current signal source passage source, if choose described HDMI interface, then by its GP1O_16 mouth output high level or low level control signal, switch output 5V direct voltage PWR5V as shown in Figure 3, and then to PWR5V_0 or PWR5V_1, power for signal processing module, control it and work on power.When receiving equipment was in non-HDMI source, PWR5V did not export 5V, and signal processing module is not worked, to reduce power consumption.
When the external signal source device that does not have the external signal source device to insert or to insert is in off-mode, not having signal input or EDID, HDCP to be connected with mistakes, described main process chip is by its GPIO_2_1 mouth output high level signal, control triode Q22 conducting, make the 19 pin ground connection of HDMI interface P15, thereby stop the external signal source device to send audio-video signal to receiving equipment.
In described receiving equipment, the signal transmission terminal of two-way HDMI interface comprises differential signal end RX1_0, RX1_0B, RX1_1, RX1_1B, RX1_2, RX1_2B, RX1C, RX1CB; Touch operating side CEC and I
2C bus end SCL, SDA respectively with the corresponding connection of two groups of alternative passages of a multichannel commutation circuit; Described multichannel commutation circuit can adopt a multichannel to switch chip TMDS341A and realize, its channel selecting termination is received the control signal that main process chip is sent, common port connects the corresponding signal terminal of described signal processing module, under the control action of main process chip, the external signal source data that the user is chosen is switched to output to and is carried out audio frequency and video in the described signal processing module and handle, and then realizes the broadcast output of audio-video signal.
In order to make described multichannel commutation circuit only switch to the signal source passage on this interface and this interface has the signal input time to work on power the user, the output that the power end of described multichannel commutation circuit is connected described power switch circuit, promptly, reach energy saving purposes by the operating time of the described multichannel commutation circuit of control.
For achieving the above object, in power switch circuit of the present utility model, also include as shown in Figure 2 circuit structure.Wherein, GPIO_9 is wherein one road GPIO mouth of main process chip, output switch control signal, and by the base stage of resistance R 180 connection NPN type triode Q16, and through pull-up resistor R346 connection+3.3V DC power supply.The grounded emitter of described NPN type triode Q16, collector electrode connects the grid of described P-channel field-effect transistor (PEFT) pipe U50 on the one hand through the first divider resistance R183, on the other hand by the second divider resistance R185 connect power circuit+3.3V dc power output end AV33.The source electrode of described P-channel field-effect transistor (PEFT) pipe U50 connects dc power output end AV33, and drain electrode connects the power end AV33_HDMI of described multichannel commutation circuit.
When main process chip has detected that the HDMI signal inserts and user when switching on the described signal source passage HDMI source, the GPIO_9 mouth output high level of main process chip, triode Q16 conducting, make the grid voltage of P-channel field-effect transistor (PEFT) pipe U50 be lower than its source voltage, and then control P-channel field-effect transistor (PEFT) pipe U50 conducting, to the power end AV33_HDMI of described multichannel commutation circuit output+3.3V direct voltage, make it enter operating state.Otherwise, the GPIO_9 mouth output low level of main process chip, P-channel field-effect transistor (PEFT) pipe U50 ends, and the AV33_HDMI end is not exported 3.3V, and the outage of multichannel commutation circuit is not worked, and then finishes its Based Intelligent Control.
The utility model is by adopting above-mentioned power switch circuit, only there is being the HDMI signal source equipment to insert and during the current HDMI of the switching to source of receiving equipment, its HDMI multichannel commutation circuit and HDMI signal processing module work on power, thereby effectively reduce Overall Power Consumption, have saved electric energy.Power switch circuit of the present utility model equally also can be applied in the receiving equipment with multichannel HDMI interface more, perhaps has in the receiving equipment of multichannel DVI interface, and the utility model is not limited thereto.
Described receiving equipment can be the electric equipments such as television set that generally use in the present family, and the utility model does not specifically limit this.
Above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example; variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. a low consumption circuit comprises external signal source interface, power circuit, main process chip and the signal processing module that the signal of outside signal source equipment input is handled; It is characterized in that: in described low consumption circuit, also include a power switch circuit, the input of described power switch circuit connects DC power supply, control end receives the control signal that main process chip is sent, and output connects the feeder ear of described signal processing module; The input of described main process chip receives the high-low level signal that the power end of described external signal source interface sends, and is communicated with output detecting the input of controlling described power switch circuit when its input has high level input and signal source passage to switch to described interface.
2. low consumption circuit according to claim 1 is characterized in that: the direct voltage of described DC power supply for importing by the power end of described external signal source interface.
3. low consumption circuit according to claim 2, it is characterized in that: described external signal source interface includes multichannel, in described power switch circuit, include a multi-channel switch chip, the multi-channel input of described multi-channel switch chip respectively with the corresponding connection of power end of multichannel external signal source interface, the channel selecting termination is received the control signal that described main process chip is sent, and output connects the feeder ear of described signal processing module.
4. low consumption circuit according to claim 3 is characterized in that: the control signal that described main process chip is sent is the channel selecting control signal, and the GPIO mouth by main process chip sends.
5. low consumption circuit according to claim 1, it is characterized in that: described external signal source interface includes multichannel, its signal transmission terminal connects described signal processing module by a multichannel commutation circuit, and the power end of described multichannel commutation circuit connects the output of described power switch circuit.
6. low consumption circuit according to claim 1 or 5, it is characterized in that: the DC power supply that connects described power switch circuit input is provided by power circuit.
7. low consumption circuit according to claim 6, it is characterized in that: in described power switch circuit, also include a NPN type triode and a P-channel field-effect transistor (PEFT) pipe, the base stage of described NPN type triode connects the control signal output ends of described main process chip, grounded emitter, collector electrode connects the grid of described P-channel field-effect transistor (PEFT) pipe on the one hand through first divider resistance, connects the output of described power circuit on the other hand by second divider resistance; The source electrode of described P-channel field-effect transistor (PEFT) pipe connects the output of described power circuit, and drain electrode connects the power end of described multichannel commutation circuit.
8. low consumption circuit according to claim 7 is characterized in that: the control signal that described main process chip is sent is a switch controlling signal, by its another road GPIO mouth output.
9. according to claim 1 or 3 or 5 described low consumption circuits, it is characterized in that: described external signal source interface is the HDMI interface, and its hot-swappable detection signal end connects a handshake gating circuit; The control end of described handshake gating circuit receives the control signal that described main process chip is sent, and the gating passage connects the power end and the hot-swappable detection signal end of described HDMI interface respectively; When the power end that detects described HDMI interface in main process chip has the high level input, control described handshake gating circuit action, be communicated with power end and its hot-swappable detection signal end of described HDMI interface.
10. low consumption circuit according to claim 9, it is characterized in that: in described handshake gating circuit, include a NPN type triode, the base stage of described triode receives the control signal that described main process chip is sent, grounded emitter, collector electrode connects the hot-swappable detection signal end of described HDMI interface on the one hand, connects the power end of described HDMI interface on the other hand by resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200216355U CN201039354Y (en) | 2007-04-29 | 2007-04-29 | A low-power consumption circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200216355U CN201039354Y (en) | 2007-04-29 | 2007-04-29 | A low-power consumption circuit |
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| CN201039354Y true CN201039354Y (en) | 2008-03-19 |
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| CNU2007200216355U Expired - Fee Related CN201039354Y (en) | 2007-04-29 | 2007-04-29 | A low-power consumption circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345904A (en) * | 2013-07-18 | 2013-10-09 | 邯郸市天之虹光电科技有限公司 | LED full color display screen control system |
| CN103684500A (en) * | 2012-09-25 | 2014-03-26 | 华为技术有限公司 | Pairing method of wireless transmitting terminal and wireless receiving terminal and related device |
| CN103731614A (en) * | 2013-12-31 | 2014-04-16 | 杭州国芯科技股份有限公司 | Television signal outputting circuit for automatically detecting terminal connection and detecting method |
-
2007
- 2007-04-29 CN CNU2007200216355U patent/CN201039354Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684500A (en) * | 2012-09-25 | 2014-03-26 | 华为技术有限公司 | Pairing method of wireless transmitting terminal and wireless receiving terminal and related device |
| CN103684500B (en) * | 2012-09-25 | 2016-08-24 | 华为技术有限公司 | Pairing method of wireless transmitting terminal and wireless receiving terminal and related device |
| CN103345904A (en) * | 2013-07-18 | 2013-10-09 | 邯郸市天之虹光电科技有限公司 | LED full color display screen control system |
| CN103731614A (en) * | 2013-12-31 | 2014-04-16 | 杭州国芯科技股份有限公司 | Television signal outputting circuit for automatically detecting terminal connection and detecting method |
| CN103731614B (en) * | 2013-12-31 | 2017-07-14 | 杭州国芯科技股份有限公司 | The TV signal output circuit and detection method of a kind of automatic detection terminal connection |
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Granted publication date: 20080319 Termination date: 20110429 |