CN101437108A - Television set - Google Patents
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- CN101437108A CN101437108A CNA2007101246051A CN200710124605A CN101437108A CN 101437108 A CN101437108 A CN 101437108A CN A2007101246051 A CNA2007101246051 A CN A2007101246051A CN 200710124605 A CN200710124605 A CN 200710124605A CN 101437108 A CN101437108 A CN 101437108A
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Abstract
The invention provides a TV set, which comprises information source input ports and a power management module. The TV set also comprises an on/off control circuit, wherein the on/off control circuit is connected with the information source input ports and comprises a signal sampling circuit and a signal processing circuit; the signal sampling circuit is used for sampling peak values of video signals of the information source input ports of the TV set; the signal processing circuit is connected with the signal sampling circuit and used for converting a signal transmitted by the signal sampling circuit into a high level signal or a low level signal and transmitting the high level signal or the low level signal to the power management module; and the power management module is used for controlling on/off of the TV set according to the high level signal. Due to the technical proposal provided by the invention, users do not need to respectively perform bootup operation on the TV set and other external equipment when using the TV set, so that the TV set is simple and convenient.
Description
Technical field
The invention belongs to TV technology, relate in particular to the technology of control TV power on and off.
Background technology
Domestic television machine industry was in by the stage of traditional simulated television to the Digital Television transition at present, and set-top box will be broken up to analog signal quite coexisting with simulated television in period fully as a kind of transitional product.Usually user's machine that televiews in this manner needs with TV remote controller and the set-top box remote controller startup and shutdown of remote-controlled television set and set-top box respectively, and this uses to the user and makes troubles.In addition, when video information equipment such as television set connection DVD, EVD, also can there be the needs problem of remote controller switching on and shutting down respectively.
When the user uses television set in reality, wish that television set can be according to the start situation of these external devices, Auto Power On after the start of external devices such as set-top box or DVD or EVD; Equally, when these external device shutdown, television set also can shut down automatically, thereby need not carry out the switching on and shutting down operation respectively at different equipment, to simplify the operation.
Disclosed a kind of method and circuit of controlling TV power on and off in No. the 200510020998.2nd, Chinese patent application, it proposes by checking the switch of controlling television set that has or not of television set AV input port vision signal.But this scheme has following deficiency: the passage of detection is the AV input port, and this is the minimum input requirement of common simulation video, can't satisfy requirements such as the high-quality component vide form 1080I/720P of set-top box output or PC form; The peak value circuit is difficult to operate as normal, and this is that actual uplink is obstructed because the relative input signal of pressure drop that peak value detection diode itself consumes is excessive; If adopt the integrated circuit comparative voltage, cost is high relatively; Need take the MCU resource, the software flow relative complex; The more important thing is can't realize the multichannel input signal detection and and input signal between isolation.
Therefore, be necessary to provide a kind of circuit of controlling TV power on and off, to meet consumers' demand.
Summary of the invention
The object of the present invention is to provide a kind of television set, being intended to solve the television set that exists in the prior art can not be according to the problem that has or not automatic switching of external device incoming video signal.
The present invention realizes like this, a kind of television set, described television set comprises information source input port and power management module, described television set also comprises the switching on and shutting down control circuit, described switching on and shutting down control circuit links to each other with described information source input port, described switching on and shutting down control circuit comprises signal sample circuit and signal processing circuit, and described signal sample circuit is used for the vision signal peak value of television set information source input port is sampled; Described signal processing circuit links to each other with described signal sample circuit, be used for the conversion of signals of described signal sample circuit transmission is become high level signal or low level signal, and be used for described high level signal or low level signal are transferred to described power management module, described power management module is used for according to described high level signal control television boot-strap.
Described signal sample circuit comprises buffer circuit, amplifying circuit and peak value sampling circuit, described buffer circuit is used for cutting off the direct current signal in the described vision signal, described amplifying circuit is used for described vision signal is amplified, and described peak value sampling circuit is used for described vision signal peak value is sampled.
Described buffer circuit comprises isolation capacitance.
Described amplifying circuit is the common collection utmost point in-phase amplification circuit of being made up of triode and its peripheral circuit.
Described peak value sampling circuit comprises two-way high speed diode (D1/D2) and electric capacity (C1).
Described signal processing circuit comprises level shift circuit and phase inverter.
Described level shift circuit comprises triode (Q1), described phase inverter comprises triode (Q2), the collector electrode of described triode (Q1) links to each other with the emitter of described triode (Q2), converts the PW_ON pin that described high level signal is imported down described power management module to after the vision signal peak value process skew of described signal sample circuit collection and the paraphase.
Described signal processing circuit also comprises buffer circuit, is used for the microcontroller MCU of described high level signal or low level signal and described TV set power administration module is isolated.
Described information source input port is a two-way or more than the two-way, and described signal sample circuit is a two-way or more than the two-way, connects described information source input port respectively.
The present invention overcomes the deficiencies in the prior art, employing is detected the vision signal peak value of television set information source input port by hardware circuit, and convert the peak value of detected vision signal to high level signal and be input to the TV set power administration module, the technical scheme of the high level signal control television boot-strap of TV set power administration module input, make that the user does not need respectively television set and its external equipment to be carried out the switching on and shutting down operation when using television set, only need to open external equipment and get final product; In addition, technical scheme provided by the invention considered the sigtnal interval from, reliable and stable; Do not need to take the resource of TV MCU, needn't do any change on the software yet, portable good.
Description of drawings
Fig. 1 is the theory diagram of the described switching on and shutting down control circuit of the embodiment of the invention;
Fig. 2 is the circuit diagram of the described switching on and shutting down control circuit of the embodiment of the invention.
Embodiment
Technical scheme provided by the invention is: hardware circuit detects the vision signal peak value of television set information source input port, and convert the peak value of detected vision signal to high level signal and be input to the TV set power administration module, the high level signal control television boot-strap of TV set power administration module input.
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The theory diagram of the described control TV power on and off of embodiment of the invention circuit as shown in Figure 1, comprise the signal sample circuit and the signal processing circuit that are connected with each road information source input port of television set, AV/VIDEO only is shown among Fig. 1, S-VIDEO, VGA (Video Graphics Array, usually connect the PC output signal,) and YPBPR (Analog Component Video signal) four tunnel information source input port, but the technical scheme that other information source input port of television set can adopt the embodiment of the invention to provide equally, finish sampling to the vision signal peak value, and the signal of sampling is transferred to signal processing circuit and handles, the vision signal of sampling is transferred to the TV set power administration module after converting " height " or " low " level to, and the TV set power administration module is controlled the startup of television set according to " height " or " low " of incoming signal level.
Because vision signal is a series of electric pulses, its level size is proportional with the brightness of pixel, is unipolar." having " of such vision signal or " nothing " are easy to be processed into " height " or " low " level by the identification of power module PW_ON pin.
The TV set power administration module is that the high-low level by outside PW_ON pin determines whether starting: when PW_ON was high level, power management module started, and just enters operating state; When PW_ON was low level, power management module was in holding state, just only standby power supply branch road in work, to satisfy the power consumption requirement of energy-conserving product when the standby.
When above-mentioned AV, S-VIDEO, YPBPR and VGA information source input port are imported by signal, the signal sampling module collects the peak value of vision signal, convert it into the PW_ON pin that is input to power management module behind the high level then, power management module PW_ON pin is that high level works on power automatically, and television set enters the state of watching; As do not detected the signal input, then power management module PW_ON pin is a low level, still is in holding state.
As shown in Figure 1, above-mentioned signal sample circuit comprises buffer circuit, amplifying circuit and peak value sampling circuit, wherein, buffer circuit is used for cutting off direct current, do not influence the signal quality that is input to the television video treatment channel, got rid of the influence of the direct current biasing that external video signal source may bring yet.Because the incoming video signal amplitude is less, standard is 1Vp-p, therefore does suitable amplification, amplifies about 3 times in the present embodiment, and the purpose of amplification is to take a sample accurately and reliably for back peak sample circuit.The format differences of having ignored concrete signal during the sampling of peak sample circuit is to avoid the influence of amplified signal distortion.
Signal processing circuit comprises level shift circuit, phase inverter and buffer circuit, for the more reliable external signal state that obtains, the application level off-centre circuit obtains accurate high-low level, its major function is to connect the requirement of TTL/CMOS circuit incoming level after guaranteeing, as the corresponding 0V of low level, the corresponding VCC of high level, the VCC of this place is 5V.Therefore but level is opposite with the logical relation of requirement herein, connects phase inverter after.For not influencing the control of original power management MCU, to finish level with diode and isolate, it mainly utilizes the unilateal conduction characteristic of diode to realize.
Concrete circuit diagram as shown in Figure 2, capacitor C 10/C20/C30/C40 works to cut off direct current, triode Q10/Q20/Q30/Q40 and its peripheral circuit R10/R11/R12/R13/C11, R20/R21/R22/R23/C21, R30/R31/R32/R33/C31 and R40/R41/R42/R43/C41 form and collect utmost point in-phase amplification circuit altogether, and about 9db gains.The peak sample circuit comprises capacitance C12/C22/C32/C42, two-way high speed diode D1/D2 and C1, as the signal U ' by capacitance C12/C22/C32/C42 during greater than Uc1 (capacitor C 1 both end voltage), the D1/D2 conducting, C1 by charging quickly very to U ' peak value; As U ' during less than Uc1, diode D1/D2 is because of instead ending partially, and the electric capacity on the C1 bleeds off by R1, reliably working when guaranteeing that peak signal arrives next time.As long as any one tunnel vision signal of input, the C1 two ends all can obtain the peak value after the corresponding amplification.Consider the characteristics of actual activity vision signal, be the more reliable actual external signal state that obtains, Q1 finishes level deviation with triode, level shift circuit finish when the Uc1 level from 0～2.3V (about 3 times of videos amplify voltage and deduct diode drop) when changing, off-centre circuit output changes from 0～5V, to satisfy the requirement that the back utmost point connects the TTL/CMOS circuit.As Q1 base stage level 〉=0.7V, Q1 begins conducting like this, and collector electrode is output as low level, obtains high level after the Q2 paraphase; As Q1 base stage level≤0.7V, Q1 ends, and collector electrode is output as high level, obtains low level after the Q2 paraphase.Diode D3 and D4 form the level buffer circuit.D4 avoids the interference to the switching on and shutting down control of power management MCU.When there was the signal input outside, the Q2 current collection is high level very, diode D3 conducting, and output is still high level, and D4 is in cut-off state because of the anode high level, power module unlatching work; When the outside did not have the signal input, the Q2 current collection is low level very, and diode D3 ends, and power module keeps original operating state.Resistance R 1 constitutes the discharge loop of capacitor C 1, externally has no progeny in the input signal, rapidly electric charge among the C1 is bled off, and detects unusual when avoiding inserting signal once more and misoperation.
Compared with prior art, the present invention has the following advantages: easy to operate, the user only need can realize simultaneously both switching on and shutting down are controlled with the remote controller of set-top box or video disc player.Compare with existing invention, have multiple signals and detect, consider the sigtnal interval from, reliable and stable; Do not need to take the MCU resource, needn't do any change on the software yet, portable good.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of television set, described television set comprises information source input port and power management module, it is characterized in that, described television set also comprises the switching on and shutting down control circuit, described switching on and shutting down control circuit links to each other with described information source input port, described switching on and shutting down control circuit comprises signal sample circuit and signal processing circuit, and described signal sample circuit is used for the vision signal peak value of television set information source input port is sampled; Described signal processing circuit links to each other with described signal sample circuit, be used for the conversion of signals of described signal sample circuit transmission is become high level signal or low level signal, and be used for described high level signal or low level signal are transferred to described power management module, described power management module is used for according to described high level signal control television boot-strap.
2, television set according to claim 1, it is characterized in that, described signal sample circuit comprises buffer circuit, amplifying circuit and peak value sampling circuit, described buffer circuit is used for cutting off the direct current signal in the described vision signal, described amplifying circuit is used for described vision signal is amplified, and described peak value sampling circuit is used for described vision signal peak value is sampled.
3, television set according to claim 2 is characterized in that, described buffer circuit comprises isolation capacitance.
4, television set according to claim 2 is characterized in that, described amplifying circuit is the common collection utmost point in-phase amplification circuit of being made up of triode and its peripheral circuit.
5, television set according to claim 2 is characterized in that, described peak value sampling circuit comprises two-way high speed diode (D1/D2) and electric capacity (C1).
6, television set according to claim 1 is characterized in that, described signal processing circuit comprises level shift circuit and phase inverter.
7, television set according to claim 6, it is characterized in that, described level shift circuit comprises triode (Q1), described phase inverter comprises triode (Q2), the collector electrode of described triode (Q1) links to each other with the emitter of described triode (Q2), converts the PW_ON pin that described high level signal is imported down described power management module to after the vision signal peak value process skew of described signal sample circuit collection and the paraphase.
8, television set according to claim 6 is characterized in that, described signal processing circuit also comprises buffer circuit, is used for the microcontroller MCU of described high level signal or low level signal and described TV set power administration module is isolated.
9, television set according to claim 1 is characterized in that, described information source input port is a two-way or more than the two-way, and described signal sample circuit is a two-way or more than the two-way, connects described information source input port respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101246051A CN101437108A (en) | 2007-11-16 | 2007-11-16 | Television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101246051A CN101437108A (en) | 2007-11-16 | 2007-11-16 | Television set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101437108A true CN101437108A (en) | 2009-05-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101246051A Pending CN101437108A (en) | 2007-11-16 | 2007-11-16 | Television set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647571A (en) * | 2011-02-16 | 2012-08-22 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN103491326A (en) * | 2013-09-24 | 2014-01-01 | 青岛海信电器股份有限公司 | All-in-one computer television and control method of all-in-one computer television |
| CN104469180A (en) * | 2014-11-04 | 2015-03-25 | 深圳市创维群欣安防科技有限公司 | Audio and video signal switching crosstalk preventing device based on analog multiplexer |
-
2007
- 2007-11-16 CN CNA2007101246051A patent/CN101437108A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647571A (en) * | 2011-02-16 | 2012-08-22 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN102647571B (en) * | 2011-02-16 | 2015-01-07 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN103491326A (en) * | 2013-09-24 | 2014-01-01 | 青岛海信电器股份有限公司 | All-in-one computer television and control method of all-in-one computer television |
| CN103491326B (en) * | 2013-09-24 | 2017-02-08 | 青岛海信电器股份有限公司 | All-in-one computer television and control method of all-in-one computer television |
| CN104469180A (en) * | 2014-11-04 | 2015-03-25 | 深圳市创维群欣安防科技有限公司 | Audio and video signal switching crosstalk preventing device based on analog multiplexer |
| CN104469180B (en) * | 2014-11-04 | 2017-12-19 | 深圳市创维群欣安防科技股份有限公司 | A kind of audio-video signal switching anti-crosstalk device based on analog multiplexer |
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Open date: 20090520 |