CN101883205B - Circuit for checking input signals and relative liquid crystal display television - Google Patents
Circuit for checking input signals and relative liquid crystal display television Download PDFInfo
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- CN101883205B CN101883205B CN 201010189690 CN201010189690A CN101883205B CN 101883205 B CN101883205 B CN 101883205B CN 201010189690 CN201010189690 CN 201010189690 CN 201010189690 A CN201010189690 A CN 201010189690A CN 101883205 B CN101883205 B CN 101883205B
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Abstract
The invention provides a liquid crystal display television (LCD TV) which carries out real-time reaction aiming at received shutdown signals, video and audio signals, data signals or remote control signals so as to break away from or enter into a standby mode; and when any signal for breaking away from the standby mode is not received, all the main power supplies of the LCD TV are kept closed, thus ensuring reduction of power consumption.
Description
Technical field
The present invention discloses a kind of circuit for checking input signals and relevant LCD TV, the espespecially a kind of circuit for checking input signals of electrical source consumption and relevant LCD TV of saving in standby mode.
Background technology
See also Fig. 1, it is a kind of simple function block schematic diagram of general LCD TV 100.As shown in Figure 1, LCD TV 100 comprises main system board 105, display floater 160, loud speaker 170, reaches frequency converter 150.Main system board 105 comprises power panel 110, secondary microcontroller 120, computing unit 130, reaches audio frequency amplifier 140.Include standby power module 112 and main power source module 114 in the power panel 110.Include computing unit power supply V1, audio frequency amplifier power supply V2, backlight electric power V3 in the main power source module 114.When LCD TV 100 entered standby mode, power panel 110 can only keep the power supply of standby power module 112, and closed all power supplys that comprise on the main power source module 114.After LCD TV 100 wishs break away from standby mode and when entering normal manipulation mode, standby power module 112 can provide standby voltage Vsb to secondary microcontroller 120, when secondary microcontroller 120 receives the start signal of prompting key command or remote command, the secondary microcontroller 120 signal PON that just output potential is higher starts the computing unit power supply V1 that main power source module 114 comprises, audio frequency amplifier power supply V2, and backlight electric power V3, with each self-starting computing unit 130, audio frequency amplifier 140, frequency converter 150, and drive according to this display floater 160 and loud speaker 170, wherein frequency converter 150 is used for driving the backlight mode of display floater 160.Yet although under standby mode, standby power module 112 still can consume the suitable electric power of main system board 105, so standby power module 112 is still remaining with progressive space saving in the power consumption under the standby mode of LCD TV 100.
Summary of the invention
The present invention discloses a kind of circuit for checking input signals.This circuit for checking input signals comprises switch and transistor.This switch comprises opening end, shutdown side, reaches output.This opening end is ground connection.This shutdown side is used for receiving shutdown signal.Whether this switch basis receives the signal that this shutdown signal decides this shutdown side of output or this opening end to input.This transistorized input is coupled to this output of this switch.This transistorized bias terminal is coupled to voltage source.This transistorized output is used for exporting start signal.This start signal is used for opening the power supply that a power panel comprises.
The present invention discloses a kind of circuit for checking input signals.This circuit for checking input signals comprises reverse amplification circuit, integrating circuit, reaches switching circuit.This reverse amplification circuit is coupled to the first voltage source.This reverse amplification circuit is used for receiving video-audio signal, to produce amplifying signal.This integrating circuit is used for this amplifying signal of integration, to produce integrated signal.This switching circuit comprises the first transistor and transistor seconds.The input of this first transistor is coupled to this integrating circuit receiving this integrated signal, and the first bias terminal of this first transistor is coupled to the second voltage source.The input of this transistor seconds is coupled to this first bias terminal of this first transistor, and the bias terminal of this transistor seconds is coupled to the tertiary voltage source, and the output of this transistor seconds is used for exporting start signal.This start signal is used for opening the power supply that a power panel comprises.
The present invention discloses a kind of circuit for checking input signals.This circuit for checking input signals comprises the first switching circuit and second switch circuit.This first switching circuit comprises the first transistor.The input of this first transistor is used for reception of data signal, and the bias terminal of this first transistor is ground connection.This second switch circuit comprises transistor seconds.The input of this transistor seconds is coupled to output and first voltage source of this first transistor.The bias terminal of this transistor seconds is coupled to the second voltage source.The output output enabling signal of this transistor seconds.This enabling signal is used for starting the power supply that a power panel comprises.
The present invention discloses a kind of circuit for checking input signals.This circuit for checking input signals comprises reverse amplification circuit, integrating circuit, switching circuit and self-hold circuit.This reverse amplification circuit is coupled to the first voltage source.This reverse amplification circuit is used for receiving remote signal, to produce amplifying signal.This integrating circuit is used for this amplifying signal of integration, to produce integrated signal.This switching circuit comprises the first transistor and transistor seconds.The input of this first transistor is coupled to this integrating circuit, to receive this integrated signal.The first bias terminal of this first transistor is ground connection.The second bias terminal of this first transistor is coupled to the second voltage source.The input of this transistor seconds is coupled to this second bias terminal of this first transistor.The bias terminal of this transistor seconds is coupled to the tertiary voltage source.The output output enabling signal of this transistor seconds.This enabling signal is used for opening the power supply that a power panel comprises.This self-hold circuit comprises the 3rd transistor.The 3rd transistorized input is coupled to this enabling signal.The 3rd transistorized the first bias terminal is ground connection.The 3rd transistorized the second bias terminal is coupled to this input of this transistor seconds.
The present invention discloses a kind of LCD TV.This LCD TV comprises battery, input signal pattern testing circuit, signal source, relay, power panel and display floater.This input signal pattern testing circuit is coupled to the electric power that this battery is provided to receive this battery.This circuit for checking input signals receives shutdown signal, video-audio signal, data-signal and/or remote signal, and produces enabling signal according to those signals.This input signal pattern testing circuit comprises power supply signal testing circuit, video-audio signal testing circuit, detection of data signal circuit, reaches the remote signal testing circuit.This power supply signal testing circuit is used for producing this enabling signal according to this shutdown signal.This video-audio signal testing circuit is used for producing this enabling signal according to this video-audio signal.This detection of data signal circuit is used for producing this enabling signal according to this data-signal.This remote signal testing circuit is used for producing this enabling signal according to this remote signal.This signal source is used to provide a plurality of driving signals.This relay (Relay) receives this enabling signal with this input signal pattern testing circuit of cause, and receives these a plurality of driving signals with this signal source of cause.This power panel is coupled to this relay, also to receive these a plurality of driving signals according to being activated its power supply in this enabling signal cause standby mode.This display floater is coupled to this power panel, and is used for the electric power that received with this power panel and show a picture according to these a plurality of driving signals.
Description of drawings
Fig. 1 is a kind of simple function block schematic diagram of general LCD TV.
Fig. 2 is the simple function block schematic diagram of the disclosed LCD TV of the present invention.
Fig. 3,4,5,6 schematic diagrames for various circuit for checking input signals that LCD TV comprises shown in Figure 2.
[main element label declaration]
| 100、200 | LCD TV |
| 105、205 | Main system board |
| 110 | Power panel |
| 112 | The standby power module |
| 114 | Main power source module |
| 120 | Secondary microcontroller |
| 130 | Computing unit |
| 140 | Audio frequency amplifier |
| 150 | Frequency converter |
| 160 | Display floater |
| 170 | Loud speaker |
| V1、V2、V3 | Power supply |
| 210 | Input power |
| 220 | Relay |
| 250 | The input signal pattern testing circuit |
| 280 | Battery |
| 300、400、500、600 | Circuit for |
| 410、610 | Reverse |
| 420、620 | Integrating circuit |
| 430、510、520、630 | Switching circuit |
| 640 | Self-hold circuit |
| SW101 | Switch |
| Q101、Q201、Q202、Q203、Q301、Q302、 Q501、Q502、Q503、Q504 | Transistor |
| R101、R102、R201、R202、R203、R204、 R205、R206、R207、R208、R209、R301、 R302、R303、R304、R305、R501、R502、 R503、R504、R505、R506、R507、R508、 R509、R510、R511、R512 | Resistance |
| C201、C202 | Electric capacity |
| D101、D201、D301、D501 | Diode |
| NA | Shutdown side |
| NC | Opening end |
| Power_key | Shutdown signal |
| PON、POFF | Signal |
| AV | Video-audio signal |
| IR | Remote signal |
| AV_A、IR_A | Amplifying signal |
| AV_C、IR_C | Integrated signal |
| HDMI、PC | Data-signal |
| Vsb31、Vsb41、Vsb42、Vsb43、Vsb51、 Vsb52、Vsb61、Vsb62、Vsb63 | The standby voltage source |
Embodiment
In order further to reduce the power consumption of set standby power module under standby mode in the LCD TV, the present invention is corresponding to the employed unlike signal of LCD TV source, exposure has various circuit for checking input signals, and has disclosed the LCD TV that comprises these circuit for checking input signals.
See also Fig. 2, it is for the simple function block schematic diagram of the disclosed LCD TV 200 of the present invention.As shown in Figure 2, LCD TV 200 comprises main system board 205, frequency converter 150, display floater 160, reaches loud speaker 170.Main system board 205 comprises input power 210, relay 220, power panel 110, computing unit 130, audio frequency amplifier 140, reaches input signal pattern testing circuit 250.Main system board 205 optionally arranges battery 280 in addition, to supply with the required power consumption under standby mode of input signal pattern testing circuit 250.Input signal pattern testing circuit 250 comprises the first circuit for checking input signals 300, the second circuit for checking input signals 400, the 3rd circuit for checking input signals 500, reaches the 4th circuit for checking input signals 600.The first circuit for checking input signals 300 receives shutdown signal Power_key, i.e. expression has TV signal just to be received by LCD TV 200, and therefore the first circuit for checking input signals 300 can send signal PON and make LCD TV 200 disengaging standby modes.The second circuit for checking input signals 400 receives video-audio signal AV, when receiving video-audio signal AV, represent to have TV signal just to be received by LCD TV 200, make LCD TV 200 break away from standby mode so the second circuit for checking input signals 400 can send signal PON; Wherein video-audio signal AV can be composite terminal signal (Composite videoconnector sigal).The 3rd circuit for checking input signals 500 receives and represents the first data-signal HDMI of outer input data or represent personal computer (Personal Computer, PC) the second data-signal PC, represent that when receiving data-signal HDMI the data or the outside personal computer signal that have the outside to input are just received by LCD TV 200, make LCD TV 200 break away from standby modes so the 3rd circuit for checking input signals 500 can produce signal PON according to this; Wherein data-signal HDMI can be high resolution multimedia interface signal (High Definition Multimedia Interface Signal, HDMIsignal).The 4th circuit for checking input signals 600 receives remote signal IR, when receiving remote signal IR, represent to have outside remote controller to send instruction and will open LCD TV 200, make LCD TV 200 break away from standby mode so the 4th circuit for checking input signals 600 can produce signal PON according to this; Note that in various embodiments of the present invention, because the signal strength signal intensity of video-audio signal AV and remote signal IR is lower, therefore need to incites somebody to action signal strength signal intensity raising separately and carry out comparatively easily trace routine with amplifying circuit.When input signal pattern testing circuit 600 receives the signal of its circuit for checking input signals that comprises, can produce signal PON to open or closed relay 220, but so that power supply V1, V2, V3 that relay 220 power-on plates 110 comprise, and those power supplys that are unlocked are in order to open each self-corresponding device.
Above-mentioned each circuit for checking input signals 300,400,500,600 detailed execution mode will be described below.See also Fig. 3, it is the schematic diagram of circuit for checking input signals 300 shown in Figure 2.As shown in Figure 3, circuit for checking input signals 300 comprises interrupteur SW 101, transistor Q101, resistance R 101, R102, reaches diode D101.Interrupteur SW 101 comprises opening end NC and shutdown side NA.Opening end NC is ground connection.Shutdown side NA is used for receiving shutdown signal Power_key, and interrupteur SW 101 is according to the shutdown signal Power_key that whether receives shutdown signal Power_key and decide earthing potential signal that output shutdown side NC couples or opening end NA to input.The input of transistor Q101 is coupled to the output NB of interrupteur SW 101 by resistance R 101, the bias terminal of transistor Q101 is coupled to standby voltage source Vsb31, and the output of transistor Q101 is used for exporting start signal PON, to open relay 220 and power panel 110.The first end of resistance R 101 is coupled to the output NB of interrupteur SW 101, and the second end of resistance R 101 is coupled to the input of transistor Q101.The first end of resistance R 102 is coupled to the second end of resistance R 101, and the second end of resistance R 102 is coupled to the bias terminal of transistor Q101.
In a preferred embodiment of the present invention, transistor Q101 is the ambipolar junction transistors of pnp type (Bipolar Junction Transistor), the input of transistor Q101 is base stage (Base), the bias terminal of transistor Q101 is emitter-base bandgap grading (Emitter), and the output of transistor Q101 is collector (Collector).The input of diode D101 is coupled to the output of transistor Q101, and the second end output signal PON of diode D101.
The function mode of circuit for checking input signals 300 is that details are as follows.When LCD TV 200 entered standby mode by the normal operation state, interrupteur SW 101 can switch to shutdown side NA, so that the input end of transistor Q101 is in high potential and transistor Q101 is closed, so signal PON can be in electronegative potential.Otherwise, when LCD TV 200 enters the normal operation state by standby mode, interrupteur SW 101 can switch to opening end NC, so that the input end of transistor Q101 is in electronegative potential and transistor Q101 is opened, so signal PON can be in high potential and open power supply V1, V2, the V3 that relay 220 and power panel 110 comprise.
See also Fig. 4, it is the schematic diagram of circuit for checking input signals 400 shown in Figure 2.As shown in Figure 4, circuit for checking input signals 400 comprises capacitor C 201, resistance R 201, reverse amplification circuit 410, integrating circuit 420, switching circuit 430 and diode D201.Reverse amplification circuit 410 is coupled to the first standby voltage source Vsb41.
In a preferred embodiment of the present invention, transistor Q201, Q202 are all the ambipolar junction transistors of npn type, and transistor Q203 is the ambipolar junction transistors of pnp type.Wherein, this input of transistor Q201 is base stage, and this first bias terminal of transistor Q201 is collector, and this second bias terminal of transistor Q201 is emitter-base bandgap grading; This input of transistor Q202 is base stage, and this bias terminal of transistor Q202 is collector, and the emitter-base bandgap grading of transistor Q202 is ground connection; This input of transistor Q203 is base stage, and this bias terminal of transistor Q203 is emitter-base bandgap grading, and this output of transistor Q203 is collector.
The mode of operation of circuit for checking input signals 400 is that details are as follows.Receive the video-audio signal AV of high potential when circuit for checking input signals 400 after, transistor Q201 can be unlocked, and the dividing potential drop that the current potential of video-audio signal AV can be by resistance R 202 and R203 and the bias voltage of the first standby voltage source Vsb41 and be exaggerated in reverse mode, and result from the bias terminal of transistor Q201 with the form of amplifying signal AV_A; When the meaning of reverse amplification described herein referred to that the current potential as video-audio signal AV is lower, the current potential that is positioned at the bias terminal of transistor 201 can be because the situation of the higher and related raising of dividing potential drop that resistance R 202 is assigned to compared to R204.Because the unlatching of transistor Q201, the current potential of the bias terminal of transistor Q201 can descend, so in fact amplifying signal AV_A is positioned at electronegative potential.After the amplifying signal AV_A that integrating circuit 420 will be positioned at electronegative potential is integrated to a certain degree the input of transistor Q202 produce the integrated signal AV_C that is positioned at high potential and so that transistor Q202 open; Thus, the current potential of the first bias terminal of transistor Q202 can descend and be in electronegative potential and so that transistor Q203 unlatching.Because the unlatching of transistor Q203, the current potential of the output of transistor Q203 can be subject to the bias voltage of the 3rd standby voltage source Vsb43 and high potential occur, therefore this moment, signal PON was in high potential, and had opened power supply V1, V2, V3 that relay 220 and power panel 110 comprise.
See also Fig. 5, it is the schematic diagram of circuit for checking input signals 500 shown in Figure 2.As shown in Figure 5, circuit for checking input signals 500 comprises the first switching circuit 510, second switch circuit 520, reaches diode D301.The first switching circuit 510 comprises transistor Q301 and resistance R 301, R302.Second switch circuit 520 comprises transistor Q302 and resistance R 303, R304, R305.
In the first switching circuit 510, the input of transistor Q301 is by resistance R 301 reception of data signal HDMI or PC, and the bias terminal of transistor Q301 is ground connection.The first end of resistance R 301 is used for reception of data signal HDMI or PC, and the second end of resistance R 301 is coupled to this input of transistor Q301.The first end of resistance R 302 is coupled to this second end of resistance R 301, and the second end of resistance R 302 is ground connection.
In second switch circuit 520, the input of transistor Q302 is coupled to output and the first standby voltage source Vsb51 of transistor Q301 by resistance R 304, the bias terminal of transistor Q302 is coupled to the second standby voltage source Vsb52, and the output output signal PON of transistor Q302, power supply V1, the V2, the V3 that are comprised with starting relay 220 and power panel 110.The first end of resistance R 303 is coupled to this output of transistor Q301, and the second end of resistance R 303 is coupled to the first standby voltage source Vsb51.The first end of resistance R 304 is coupled to this output of transistor Q301, and the second end of resistance R 304 is coupled to this input of transistor Q302.The first end of resistance R 305 is coupled to this second end of resistance R 304, and the second end of resistance R 305 is coupled to this bias terminal of transistor Q302.The first end of diode D301 is coupled to this output of transistor Q302, and the second end of diode D301 is used for output signal PON.
In a preferred embodiment of the present invention, transistor Q301 is the ambipolar junction transistors of npn type, and transistor Q302 is the ambipolar junction transistors of pnp type, wherein this input of transistor Q301 is base stage, this bias terminal of transistor Q301 is emitter-base bandgap grading, and this output of transistor Q301 is collector, and this input of transistor Q302 is base stage, this bias terminal of transistor Q302 is emitter-base bandgap grading, and this output of transistor Q302 is collector.
The function mode of circuit for checking input signals 500 explains orally as follows.When circuit for checking input signals 500 received the data-signal HDMI of high potential or PC, transistor Q301 can be unlocked and the current potential of the output of pulldown transistors 0301, and therefore turn-on transistor Q302.Thus, the current potential of the output of transistor Q302 can rise because being subject to the bias voltage of the second standby voltage source Vsb52, so that signal PON is positioned at high potential, and and then opens power supply V1, V2, the V3 that relay 220 and power panel 110 comprise.
See also Fig. 6, it is the schematic diagram of circuit for checking input signals 600 shown in Figure 2.As shown in Figure 6, circuit for checking input signals 600 comprises resistance R 501, reverse amplification circuit 610, integrating circuit 620, switching circuit 630, self-hold circuit 640, reaches diode D501.Reverse amplification circuit 610 comprises transistor Q501, reaches resistance R 502, R503, R504.Integrating circuit 620 comprises resistance R 505 and capacitor C 501.Switching circuit 630 comprises transistor Q502 and Q504, reaches resistance R 506, R507, R508, R509, R512.Self-hold circuit 640 comprises transistor Q503, reaches resistance R 510, R511.
In reverse amplification circuit 610, the input of transistor Q501 receives remote signal IR by resistance R 501, and the first bias terminal of transistor Q501 is ground connection, and the second bias terminal of transistor Q501 is coupled to the first standby voltage source Vsb61.The first end of resistance R 503 is coupled to this input of transistor Q501, and the second end of resistance R 503 is coupled to this first bias terminal of transistor Q501.The first end of resistance R 502 is coupled to this input of transistor Q501, and the second end of resistance R 502 is coupled to the first standby voltage source Vsb61.The first end of resistance R 504 is coupled to this second bias terminal of transistor Q501, and the second end of resistance R 504 is coupled to this second end of resistance R 502.Reverse amplification circuit 610 receives remote signal IR and its current potential is amplified with reverse manner, and produces amplifying signal IR_A in this second bias terminal of transistor Q501.
In integrating circuit 620, this second bias terminal that the first end of resistance R 505 is coupled to transistor 501 is receiving this amplifying signal IR_A, and the second end of resistance R 505 is used for exporting integrated signal IR_C.The first end of capacitor C 501 is coupled to this second end of resistance R 505, and the second end of capacitor C 501 is ground connection.Integrating circuit 620 is the amplifying signal IR_A that receives integration in addition, and at this second end output integrated signal IR_C of resistance R 505.
In switching circuit 630, the input of transistor Q502 is coupled to resistance R 505, and to receive integrated signal IR_C, the first bias terminal of transistor Q 502 is ground connection, and the second bias terminal of transistor Q502 is coupled to the second standby voltage source Vsb62.The first end of resistance R 506 is coupled to this input of transistor Q502, and the second end of resistance 506 is coupled to this first bias terminal of transistor Q502.The input of transistor Q504 is coupled to this second bias terminal that is coupled to transistor Q502 by resistance R 508, the bias terminal of transistor Q504 is coupled to the 3rd standby voltage source Vsb63, and the output of transistor Q504 output enabling signal PON, power supply V1, the V2, the V3 that are comprised to open relay 220 and power panel 110.The first end of resistance R 507 is coupled to this output of transistor Q502, and the second end of resistance R 507 is coupled to the second standby voltage source Vsb62.The first end of resistance R 508 is coupled to this output of transistor Q502, and the second end of resistance R 508 is coupled to this input of transistor Q504.The first end of resistance R 509 is coupled to this input of transistor Q504, and the second end of resistance R 509 is coupled to the 3rd standby voltage source Vsb63.The first end of resistance R 512 is coupled to this second end of resistance R 509, and the second end of resistance R 512 is coupled to this bias terminal of transistor Q504.
In self-hold circuit 640, the input of transistor Q503 is coupled to and receives enabling signal PON, and the first bias terminal of transistor Q503 is ground connection, and the second bias terminal of transistor Q503 is coupled to this input of transistor Q504.The first end of resistance R 510 receives enabling signal PON, and the second end of resistance R 510 is coupled to this input of transistor Q503.The first end of resistance R 511 is coupled to this second end of resistance R 510, and the second end of resistance R 511 is ground connection.
In a preferred embodiment of the present invention, transistor Q501, Q502, Q503 are the ambipolar junction transistors of npn type, and transistor Q504 is the ambipolar junction transistors of pnp type.Therefore this input of transistor Q502 is base stage, and this bias terminal of transistor Q502 is emitter-base bandgap grading, and this output of transistor Q502 is collector; This input of transistor Q504 is base stage, and this bias terminal of transistor Q504 is emitter-base bandgap grading, and this output of transistor Q504 is collector; This input of transistor Q503 is base stage, and this first bias terminal of transistor Q503 is emitter-base bandgap grading, and this second bias terminal of transistor Q503 is collector; This input of transistor Q501 is base stage, and this first bias terminal of transistor Q501 is emitter-base bandgap grading, and this second bias terminal of transistor Q501 is collector.
The function mode of circuit for checking input signals 600 is that explanation is as follows.When the user has started remote controller momently, and when making the of short duration appearance high potential of remote signal IR, reverse amplification circuit 610 can be with remote signal IR to amplify as above-mentioned reverse manner, and produce amplifying signal IR_A in the second bias terminal of transistor Q501, then integrating circuit 620 can with amplifying signal IR_A in addition integration produce integrated signal IR_C.When the current potential of integrated signal IR_C is accumulate to when being enough to by its high potential transistor Q502 to be opened, the current potential of the output of transistor Q502 can descend and transistor Q504 is unlocked, so that the current potential of the output of transistor Q504 presents high potential under the bias voltage of the 3rd standby voltage source Vsb63, and export according to this enabling signal PON of high potential, power supply V1, the V2, the V3 that are comprised to open relay 220 and power panel 110.Yet owing to only can be kept the high potential of one period short time by the remote signal IR that the user started, if remote signal IR is returned to electronegative potential more afterwards, enabling signal PON will be returned to electronegative potential and cause closing of above-mentioned each power supply; In order to prevent this situation, self-hold circuit 640 remains on electronegative potential by the input with transistor Q504, keeps the high potential of enabling signal PON.When self-hold circuit 640 received the enabling signal PON of high potential by resistance R 510, transistor Q503 can open and the input current potential of lasting pulldown transistors Q504, and kept the unlatching of transistor Q504 and the high potential of enabling signal PON.
The present invention discloses a kind of LCD TV and corresponding to the set circuit for checking input signals of types of signals.This LCD TV can for the shutdown signal that receives, video-audio signal, data-signal, and remote signal make real-time reaction to break away from or to enter standby mode, when receiving to break away from any signal of standby mode, then do not keep closing of each main power source of LCD TV, to guarantee the minimizing of power consumption.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. LCD TV comprises:
Battery;
The input signal pattern testing circuit, be coupled to the electric power that this battery is provided to receive this battery, this input signal pattern testing circuit receives shutdown signal, video-audio signal, data-signal and/or remote signal, and according to those signals generation enabling signals, this input signal pattern testing circuit comprises:
The power supply signal testing circuit is used for producing this enabling signal according to this shutdown signal;
The video-audio signal testing circuit is used for producing this enabling signal according to this video-audio signal;
The detection of data signal circuit is used for producing this enabling signal according to this data-signal; And
The remote signal testing circuit is used for producing this enabling signal according to this remote signal;
Signal source is used to provide a plurality of driving signals;
Relay is used for receiving this enabling signal from this input signal pattern testing circuit, and is used for receiving these a plurality of driving signals from this signal source;
Power panel is coupled to this relay, with according to this enabling signal, starts its power supply and receive these a plurality of driving signals in standby mode; And
Display floater is coupled to this power panel, and is used for the electric power that received with this power panel and show a picture according to these a plurality of driving signals.
2. LCD TV according to claim 1 also comprises:
Computing unit, be coupled to this power panel, this computing unit is used for receiving electric power and these a plurality of driving signals of this power panel, is used for sending standby signal so that this power panel enters this standby mode, and is used for reaching this this display floater of a plurality of drive with the electric power that is received; And
Audio frequency amplifier is coupled to the loud speaker that this power panel and this display floater comprise, and is used for reaching this this loud speaker of a plurality of drive with the electric power that this power panel provides.
3. LCD TV according to claim 1 and 2, wherein said power supply signal testing circuit comprises:
Switch comprises opening end, shutdown side and output, and wherein this opening end is ground connection, and this shutdown side is used for receiving shutdown signal, and whether this switch basis receives the signal that this shutdown signal decides this shutdown side of output or this opening end to input; And
Transistor, its input are coupled to this output of this switch, and this transistorized bias terminal is coupled to voltage source, and this transistorized output is used for exporting start signal, and wherein this start signal is used for opening the power supply that a power panel comprises.
4. LCD TV according to claim 3, wherein said power supply signal testing circuit also comprises:
The first resistance, its first end are coupled to this output of this switch, and the second end of this first resistance is coupled to this transistorized this input;
The second resistance, its first end are coupled to this second end of this first resistance, and the second end of this second resistance is coupled to this transistorized this bias terminal.
5. LCD TV according to claim 1 and 2, wherein said video-audio signal testing circuit comprises:
Reverse amplification circuit is coupled to the first voltage source, and this reverse amplification circuit is used for receiving video-audio signal, to produce amplifying signal;
Integrating circuit is used for this amplifying signal of integration, to produce integrated signal; And
Switching circuit comprises:
The first transistor, its input are coupled to this integrating circuit receiving this integrated signal, and the first bias terminal of this first transistor is coupled to the second voltage source; And
Transistor seconds, its input are coupled to this first bias terminal of this first transistor, and the bias terminal of this transistor seconds is coupled to the tertiary voltage source, and the output of this transistor seconds is used for exporting start signal.
6. LCD TV according to claim 5,
Wherein this first transistor is the ambipolar junction transistors of npn type, and this transistor seconds is the ambipolar junction transistors of pnp type;
Wherein this input of this first transistor is base stage, and this of this first transistor the first bias terminal is collector, and the emitter-base bandgap grading of this first transistor is ground connection;
Wherein this input of this transistor seconds is base stage, and this bias terminal of this transistor seconds is emitter-base bandgap grading, and this output of this transistor seconds is collector.
7. LCD TV according to claim 1 and 2, wherein said detection of data signal circuit comprises:
The first switching circuit comprises:
The first transistor, its input are used for reception of data signal, and the bias terminal of this first transistor is ground connection; And
The second switch circuit comprises:
Transistor seconds, its input is coupled to output and first voltage source of this first transistor, the bias terminal of this transistor seconds is coupled to the second voltage source, and the output of this transistor seconds output enabling signal, and wherein this enabling signal is used for starting the power supply that power panel comprises.
8. LCD TV according to claim 7, wherein this first switching circuit also comprises:
The first resistance, its first end is used for receiving this data-signal, and the second end of this first resistance is coupled to this input of this first transistor;
The second resistance, its first end are coupled to this second end of this first resistance, and the second end of this second resistance is ground connection.
9. LCD TV according to claim 1 and 2, wherein said remote signal testing circuit comprises:
Reverse amplification circuit is coupled to the first voltage source, and this reverse amplification circuit is used for receiving remote signal, to produce amplifying signal;
Integrating circuit is used for this amplifying signal of integration, to produce integrated signal;
Switching circuit comprises:
The first transistor, its input is coupled to this integrating circuit, and to receive this integrated signal, the first bias terminal of this first transistor is ground connection, and the second bias terminal of this first transistor is coupled to the second voltage source; And
Transistor seconds, its input is coupled to this second bias terminal of this first transistor, the bias terminal of this transistor seconds is coupled to the tertiary voltage source, and the output of this transistor seconds output enabling signal, and wherein this enabling signal is used for opening the power supply that a power panel comprises; And
Self-hold circuit comprises:
The 3rd transistor, its input is coupled to this enabling signal, and the 3rd transistorized the first bias terminal is ground connection, and the 3rd transistorized the second bias terminal is coupled to this input of this transistor seconds.
10. LCD TV according to claim 9,
Wherein this first transistor and the 3rd transistor are all the ambipolar junction transistors of npn type, and this transistor seconds is the ambipolar junction transistors of pnp type;
Wherein this input of this first transistor is base stage, and this of this first transistor the first bias terminal is emitter-base bandgap grading, and this second bias terminal end of this first transistor is collector;
Wherein this input of this transistor seconds is base stage, and this bias terminal of this transistor seconds is emitter-base bandgap grading, and this output of this transistor seconds is collector; And
Wherein the 3rd transistorized this input is base stage, and the 3rd transistorized this first bias terminal is emitter-base bandgap grading, and the 3rd transistorized this second bias terminal is collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010189690 CN101883205B (en) | 2010-05-26 | 2010-05-26 | Circuit for checking input signals and relative liquid crystal display television |
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| CN 201010189690 CN101883205B (en) | 2010-05-26 | 2010-05-26 | Circuit for checking input signals and relative liquid crystal display television |
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| CN201310083023.9A Division CN103167316B (en) | 2010-05-26 | 2010-05-26 | Input signal detection circuit and related liquid crystal television |
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| CN101883205A CN101883205A (en) | 2010-11-10 |
| CN101883205B true CN101883205B (en) | 2013-04-17 |
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| CN102799258B (en) * | 2011-05-27 | 2015-05-20 | 友懋国际科技股份有限公司 | Monitor system for computer power supply |
| CN102780865B (en) * | 2012-07-24 | 2015-06-03 | 深圳创维－Rgb电子有限公司 | Television and audio playing method thereof |
| CN103561221B (en) | 2013-11-15 | 2016-08-17 | 京东方科技集团股份有限公司 | A kind of power supply circuits and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101386A (en) * | 2006-07-05 | 2008-01-09 | 群康科技(深圳)有限公司 | Power supply and discharge circuit of liquid-crystal panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101101386A (en) * | 2006-07-05 | 2008-01-09 | 群康科技(深圳)有限公司 | Power supply and discharge circuit of liquid-crystal panel |
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