CN202475621U - Led liquid crystal television - Google Patents
Led liquid crystal television Download PDFInfo
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- CN202475621U CN202475621U CN2011205746890U CN201120574689U CN202475621U CN 202475621 U CN202475621 U CN 202475621U CN 2011205746890 U CN2011205746890 U CN 2011205746890U CN 201120574689 U CN201120574689 U CN 201120574689U CN 202475621 U CN202475621 U CN 202475621U
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Abstract
The utility model relates to an LED liquid crystal television which includes a television mainboard, a liquid crystal screen including an LED backlight, a rectifier and filter circuit, a PFC circuit, a reverse excitation circuit, and an LED driving circuit. The rectifier and filter circuit receives an alternating current input, and then carries out the rectification and the filtering so as to provide a first direct voltage. The PFC circuit is electrically connected with the rectifier and filter circuit to receive the first direct voltage and carries out the power factor correction, and then provides a second direct voltage. The reverse excitation circuit receives the second direct voltage and outputs a third direct voltage to the television mainboard and the LED driving circuit which take the third direct voltage as a working voltage, and outputs a fourth direct voltage to the LED driving circuit so as to provide the power supply voltage to the LED backlight. A power circuit of a conventional LED liquid crystal television is complex in architecture, low in system efficiency, poor in reliability, and is high in cost, the LED liquid crystal television solves the above defects, and achieves the high reliability and low cost through constructing and applying the architecture of PFC circuit+reverse excitation circuit+LED driving circuit.
Description
Technical field
The utility model relates to the Display Technique field, particularly a kind of LED LCD TV.
Background technology
As shown in Figure 1; Traditional LED LCD TV 100 comprises: current rectifying and wave filtering circuit 11, pfc circuit (power factor correction circuit; Circuit of power factor correction) 13, stand-by circuit 15, LCC circuit 17 and led drive circuit 19, and TV motherboard 22 and liquid crystal display screen 24.At this, LCC circuit 17 is a kind of circuit form of series parallel resonance circuit (series-parallel resonance circuit), and TV motherboard 22 comprises circuit such as audio/video decoder, and liquid crystal display screen 24 comprises LED-backlit source and liquid crystal panel.In addition; Output DC was depressed into pfc circuit 13 after current rectifying and wave filtering circuit 11 received and exchanges input and carry out rectifying and wave-filtering; Direct voltage by 13 pairs of inputs of pfc circuit carries out dividing two-way output after the power factor correction; One the road supplies with stand-by circuit 15, and LLC circuit 17 is then supplied with on another road, guarantees the higher power factor of whole power circuit (PF) value whereby and guarantees harmonic factor (harmonic wave factor).Wherein, stand-by circuit 15 provides special-purpose standby power to TV motherboard 22, to reduce stand-by power consumption; LLC circuit 17 provides required supply voltage to TV motherboard 22 and led drive circuit 19, and carries out drive controlling by the LED-backlit source in 19 pairs of liquid crystal display screens 24 of led drive circuit.
By on can know; Because the power supply of traditional LED LCD TV 100 and the framework that the LED driving framework is adopted are pfc circuit+LLC circuit+led drive circuit+stand-by circuit; This kind framework is complicated, system effectiveness is low, reliability is relatively poor, and higher cost also has bigger difficulty for the application of product.
The utility model content
Therefore, the utility model proposes a kind of new LED LCD TV to the defective of power supply in traditional LED LCD TV and LED driving framework, to reduce system cost and complexity and to have higher reliability.
Particularly, a kind of LED LCD TV that an embodiment of the utility model provides, it comprises TV motherboard, liquid crystal display screen, current rectifying and wave filtering circuit, pfc circuit, circuit of reversed excitation and led drive circuit, liquid crystal display screen comprises the LED-backlit source.Wherein, current rectifying and wave filtering circuit receives and exchanges input and carry out rectifying and wave-filtering so that first direct voltage to be provided.Pfc circuit is electrically connected current rectifying and wave filtering circuit and after receiving first direct voltage and carrying out Active PFC, second direct voltage is provided.Circuit of reversed excitation receives second direct voltage and exports the 3rd direct voltage and the 4th direct voltage; TV motherboard and led drive circuit receive the 3rd direct voltage respectively as operating voltage, and led drive circuit receives the 4th direct voltage and to the LED-backlit source supply voltage is provided whereby.
In the embodiment of the utility model, above-mentioned current rectifying and wave filtering circuit for example comprises differential mode, common mode filtering circuit part and rectification circuit part.
In the embodiment of the utility model, above-mentioned pfc circuit for example mainly comprises pfc controller, mains switch, detection resistance, boost inductance, booster diode and dividing potential drop sample resistance; Boost inductance receives first direct voltage and first direct voltage are connected to booster diode through diode electrically negative terminal; The negative terminal of booster diode is as the output and the dividing potential drop sample resistance ground connection through being connected in series of second direct voltage, and the anode of booster diode is electrically connected to boost inductance and passes through mains switch in regular turn and detect grounding through resistance; Mains switch and the node, the control end of mains switch and the different pins that the node between the dividing potential drop sample resistance is electrically connected to pfc controller respectively that detect between the resistance.
In the embodiment of the utility model, above-mentioned circuit of reversed excitation for example mainly comprises anti-swash controller, anti-violent change depressor, mains switch, detection resistance, first output diode, second output diode and feedback circuit; The former limit winding of anti-violent change depressor receives second direct voltage and passes through mains switch in regular turn and detect grounding through resistance; Mains switch is electrically connected to the anti-different pins that swash controller respectively with the node and the control end of mains switch that detect between the resistance; One end of the secondary winding of anti-violent change depressor is exported the 4th direct voltage through first output diode, and the other end is exported the 3rd direct voltage through second output diode; Feedback circuit is electrically connected between the feedback pin of the 3rd direct voltage and anti-sharp controller.Further, above-mentioned feedback circuit for example has feedback input end and start/Opportunity awaiting control for linear end and mainly comprises optical coupler, error amplifier, control switch, diode and first to the 6th resistance; An output of optical coupler is electrically connected to anti-feedback pin and another output head grounding that swashs controller; An input of optical coupler is electrically connected to this feedback input end through first resistance, and another input is electrically connected to feedback input end and passes through error amplifier ground connection through second resistance; The 3rd resistance and the 5th resistance string are connected between feedback input end and the ground, and the node between the 3rd resistance and the 5th resistance is electrically connected to the control end of error amplifier; One end of the 4th resistance is electrically connected to feedback input end, and the other end is through control switch ground connection and in regular turn through diode and the 6th grounding through resistance, and the node between diode and the 6th resistance is electrically connected to the control end of error amplifier; The control end of control switch is electrically connected to start/Opportunity awaiting control for linear end, and feedback input end is electrically connected to the 3rd direct voltage.
In the embodiment of the utility model, above-mentioned led drive circuit for example mainly comprises driving governor, inductance, diode, first control switch, the 7th resistance, second control switch and the 8th resistance; The 4th direct voltage is passed to the LED power end through inductance and diode in regular turn, and the node between inductance and the diode is in regular turn through first control switch and the 7th grounding through resistance, and the control end of first control switch is electrically connected to the driving pin of driving governor; One end of second control switch is electrically connected to the LED control end, and the other end is through the 8th grounding through resistance, and control end is electrically connected to the driving pin of driving governor; Node between second control switch and the 8th resistance is electrically connected to the feedback pin of driving governor; The LED-backlit source is electrically connected between LED power end and the LED control end.In addition, above-mentioned led drive circuit
(37)For example also comprise switching circuit, the 3rd direct voltage is electrically connected to the power pins of driving governor via switching circuit.In addition, above-mentioned led drive circuit for example also comprises pulse-width modulation circuit, and pulse-width modulation circuit is electrically connected to driving governor and have a pulse-width signal input.Moreover above-mentioned LED power end for example further passes through the tenth resistance and the 11 grounding through resistance of serial connection; And the node between the tenth resistance and the 11 resistance is electrically connected to the breech lock pin of driving governor.
The embodiment of the utility model is to the shortcoming that the power circuit framework is complicated, system effectiveness is low, reliability is relatively poor and cost is higher of traditional LED LCD TV; Through the building and using of novel pfc circuit+circuit of reversed excitation+led drive circuit framework, high reliability and low cost have really been realized.
Above-mentioned explanation only is the general introduction of the utility model technical scheme; In order more to know the technological means of understanding the utility model; And can implement according to the content of specification, and for let the above-mentioned of the utility model with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 is the schematic block diagram of traditional LED LCD TV.
Fig. 2 is the schematic block diagram of a kind of LED LCD TV of the utility model embodiment.
Fig. 3 is the schematic circuit of current rectifying and wave filtering circuit among Fig. 2.
Fig. 4 is the schematic circuit of pfc circuit among Fig. 2.
Fig. 5 is the schematic circuit of circuit of reversed excitation among Fig. 2.
Fig. 6 is the schematic circuit of led drive circuit among Fig. 2.
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined goal of the invention is taked; Below in conjunction with accompanying drawing and preferred embodiment; To its embodiment of LED LCD TV, method, step, structure, characteristic and the effect that proposes according to the utility model, specify as after.
Aforementioned and other technology contents, characteristics and the effect of relevant the utility model can clearly appear in following the cooperation in the graphic preferred embodiment detailed description of reference.Explanation through embodiment; When can being to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the utility model; Yet the appended graphic usefulness that only provides reference and explanation is not to be used for the utility model is limited.
See also Fig. 2, it is the schematic block diagram of a kind of LED LCD TV of the utility model embodiment.In Fig. 2, LED LCD TV 300 comprises current rectifying and wave filtering circuit 31, pfc circuit 33, circuit of reversed excitation 35, led drive circuit 37, TV motherboard 42 and liquid crystal display screen 44.Wherein, current rectifying and wave filtering circuit 31, pfc circuit 33, circuit of reversed excitation 35 and led drive circuit 37 constitute the power supply and the LED driving framework of LED LCD TV 300 in the present embodiment.TV motherboard 42 for example comprises circuit such as audio/video decoder; Liquid crystal display screen 44 for example comprises LED-backlit source and liquid crystal panel.
See also Fig. 3; The AC-input voltage Vac that current rectifying and wave filtering circuit 31 receives is before through the full-wave bridge rectifier circuit that comprises diode VD1 ~ VD4; Utilize fuse F1 and thermistor RT1 to realize that short-circuit protection and restriction start impulse current, and utilize capacitor C 1, C2 filtering differential mode noise and utilize capacitor C 3, C4 and common-mode inductor L1, L2 filtering common-mode noise.Afterwards, exportable direct voltage Vin behind full-wave bridge rectifier.In addition, the ac output voltage Vac1 after filtering out differential mode noise and common-mode noise also can be provided before carrying out full-wave bridge rectifier.In the present embodiment, the scope of the AC-input voltage Vac that current rectifying and wave filtering circuit 31 is suitable for is 100V ~ 240V, and capacitor C 1 ~ C4 and common-mode inductor L1 ~ L2 are as the main composition of differential mode, common mode filtering circuit part.
See also Fig. 4, the dc output end that pfc circuit 33 is electrically connected to current rectifying and wave filtering circuit 31 is to receive VD Vin and Vin is carried out output dc voltage Vin1 (for example being 380V) after the power factor correction.In the present embodiment, pfc circuit 33 mainly comprises pfc controller N1, (Boost) inductance L 3 of boosting, mains switch V1, detect resistance R S1, booster diode VD5, dividing potential drop sample resistance R1 and R2 and capacitor C 5 is supported in output.Wherein, Direct voltage Vin1 is electrically connected to a end of boost inductance L3 and is connected to the anode that capacitor C 5 is supported in output via diode electrically simultaneously; The b of boost inductance L3 holds through booster diode VD5 and is electrically connected to the anode of output support capacitor C 5 and passes through mains switch V1 and detection resistance R S1 ground connection simultaneously in regular turn; The c end ground connection of boost inductance L3, and the Zcd pin that the d of boost inductance L3 end is electrically connected to pfc controller N1 is to provide the control signal frequency of control signal control pfc controller N1 adjustment Dri pin output.Dividing potential drop sample resistance R1 and R2 are serially connected with output and support between the anode and ground of capacitor C 5.At this; Pfc controller N1 for example is the MC33262PFC control chip; Its CS pin is electrically connected to mains switch V1 and detects the node between the resistance R S1; The Dri pin is electrically connected to the control end of mains switch V1, and VFB pin (feedback pin) is electrically connected to node between dividing potential drop sample resistance R1 and the R2 with the variation of sense current in direct output voltage V in1 and feed back to the ON time length that pfc controller N1 controls mains switch V1.
See also Fig. 5, circuit of reversed excitation 35 mainly comprises the anti-controller N2 of swashing, anti-violent change depressor T1, mains switch V2, detects resistance R S2, diode VD6 ~ VD10 and feedback circuit 351.Wherein, Anti-sharp controller N2 for example is the NCP1271 control chip; Its HV pin (also being the high voltage startup pin) is electrically connected to current rectifying and wave filtering circuit 31 to receive ac output voltage Vac1; Its Skip/latch pin is through grounding through resistance, and its VCC pin is connected to the y end of the former limit winding of anti-violent change depressor T1 through diode VD9; And the x of the former limit winding of anti-violent change depressor T1 end ground connection.Detect the end ground connection of resistance R S2, and the other end of detection resistance R S2 is electrically connected to the z end of the former limit winding of anti-violent change depressor T1 through mains switch V2; The node that detects between resistance R S2 and the mains switch V2 is electrically connected to the CS pin that instead swashs controller N2, and the control end of mains switch V2 is electrically connected to the Drv pin of the anti-controller N2 of swashing.In addition, the w termination of the former limit winding of anti-violent change depressor T1 is received stream output voltage V in1 as the input power supply.One end of the secondary winding of anti-violent change depressor T1 is via diode VD6 output high-voltage dc voltage Vout2, and the other end of the secondary winding of anti-violent change depressor T1 is via diode connected in parallel VD7 and VD8 output low-voltage dc voltage Vout1.And low-voltage dc voltage Vout1 is coupled to the FB pin that instead swashs controller N2 via feedback circuit 351, controls the ON time length of mains switch V2 whereby, realizes the control of output constant voltage.
For feedback circuit 351; It mainly comprises optical coupler N3, error amplifier N4, resistance R 3 ~ R8, control switch V3; And have a start/Opportunity awaiting control for linear end STB and a feedback input end INP, this feedback input end INP is electrically connected to low-voltage direct output voltage V out1.Wherein, the output of optical coupler N3 is connected to GND pin and the ground connection of the anti-controller N2 of swashing, and another output is connected to the FB pin (feedback pin) of the anti-controller N2 of swashing; The input of optical coupler N3 is connected to feedback input end INP through resistance R 3; Another input of optical coupler N3 is connected to feedback input end INP through resistance R 4 and through error amplifier N4 ground connection, and resistance R 5 and R7 are serially connected with between feedback input end INP and the ground and node between the two is connected to the control end of error amplifier N4.One end of resistance R 6 is electrically connected to feedback input end INP, and the other end is through control switch V3 ground connection and in regular turn through diode VD10 and resistance R 8 ground connection, and the node between diode VD10 and the resistance R 8 is electrically connected to the control end of error amplifier N4.The control end of control switch V3 is electrically connected to start/Opportunity awaiting control for linear end STB.When start/Opportunity awaiting control for linear end STB be input as logical one the time, control switch V3 conducting, this moment, the value of low-voltage direct output voltage V out1 for example was 12V; And when start/Opportunity awaiting control for linear end STB be input as logical zero (corresponding to holding state) time, control switch V3 ends, this moment, the value of low-voltage direct output voltage V out1 for example was positioned at voltage range 5V ~ 7.5V, thereby can realize low-power consumption standby.
In addition, the operation principle of circuit of reversed excitation 35 is roughly: the Drv pin that instead swashs controller N2 is exported for example square-wave signal of control signal; When control signal is high level, mains switch V2 conducting, anti-violent change depressor T1 energy storage; When control signal was low level, mains switch V2 ended, and anti-violent change depressor T1 releases energy, and diode VD6 and VD7 ~ VD8 conducting is also exported high-voltage dc voltage Vout2 and low-voltage dc voltage Vout1 respectively.Feedback circuit 35 is through relatively determining whether the light-emitting diode among its optical coupler N3 is lighted in the back to the sampling of low-voltage direct output voltage V out1 and the reference voltage that provides with error amplifier N4 (for example 2.5V); The state of the low-voltage dc voltage Vout1 of output voltage error signal to inform output is provided to the anti-FB pin that swashs controller N2 whereby, realizes close-loop feedback control.
See also Fig. 6, led drive circuit 37 mainly comprises driving governor N5, switching circuit 371, pulse-width modulation circuit 373, control switch V4 ~ V5, inductance L 4, diode VD11, output support capacitor C 6 and resistance R 9 ~ R13.Wherein, driving governor N5 for example is the NCP1351 control chip.The low-voltage dc voltage Vout1 of circuit of reversed excitation 35 outputs is electrically connected to the VCC pin (power pins) of driving governor N5 through switching circuit 371; And the VCC pin of driving governor N5 and CTIMER pin, LATCH pin link together, and whether switching circuit 371 has a switch control end SW and allow low pressure output voltage V out1 to input to driving governor N5 so that operating voltage to be provided with decision.Pulse-width modulation circuit 373 is electrically connected to the CT pin of driving governor N5, and has a pulse-width signal input PWM to realize the brightness adjustment control (Dimming) to the LED-backlit source 441 in the liquid crystal display screen 44.Led drive circuit 37 has a LED power end LED+ and a LED control end LED-; 441 in LED-backlit source can be connected between LED+ and the LED-; LED power end LED+ supports capacitor C 6 ground connection and is connected to high-voltage dc voltage Vout2 via diode VD11 and inductance L 4 in regular turn through output; LED control end LED-is in regular turn via control switch V5 and resistance R 10 ground connection, and the control end of control switch V5 is connected to the Drv pin (driving pin) of driving governor N5; The end of control switch V4 is connected to the node between inductance L 4 and the diode VD11, and the other end is through resistance R 9 ground connection, and the control end of control switch V4 is electrically connected to the Drv pin of driving governor N5.In addition, the node between control switch V5 and the resistance R 10 is electrically connected to the FB pin (feedback pin) of driving governor N5 through resistance R 11, to realize the constant current control to LED-backlit source 441 in the liquid crystal display screen 44.In other words, control switch V5, resistance R 10 ~ R11 are as the chief component in the constant-current control circuit in LED-backlit source 441.In addition, LED power end LED+ is resistance R 12 and the R13 ground connection through being connected in series further, and the node OVP between resistance R 12 and the R13 is electrically connected to the LATCH pin (breech lock pin) of driving governor N5 to realize overvoltage protection.
In sum; The shortcoming that the power circuit framework is complicated, system effectiveness is low, reliability is relatively poor and cost is higher to traditional LED LCD TV; The utility model being built and using through novel pfc circuit+circuit of reversed excitation+led drive circuit framework, has really realized high reliability and low cost
The above; It only is the preferred embodiment of the utility model; Not being that the utility model is done any pro forma restriction, though the utility model with the preferred embodiment exposure as above, yet is not in order to limit the utility model; Anyly be familiar with the professional and technical personnel; In not breaking away from the utility model technical scheme scope, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be not break away from the utility model technical scheme content in every case;, all still belong in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.
Claims (9)
1. a LED LCD TV comprises TV motherboard, liquid crystal display screen, current rectifying and wave filtering circuit, pfc circuit and led drive circuit, and this liquid crystal display screen comprises the LED-backlit source; It is characterized in that,
This LED LCD TV also comprises: circuit of reversed excitation is electrically connected this pfc circuit and this led drive circuit;
Wherein, This current rectifying and wave filtering circuit receives the interchange input and carries out behind the rectifying and wave-filtering first direct voltage being provided; This pfc circuit is electrically connected this current rectifying and wave filtering circuit and after receiving this first direct voltage and carrying out Active PFC, second direct voltage is provided; This circuit of reversed excitation receives this second direct voltage and exports the 3rd direct voltage and the 4th direct voltage; This TV motherboard and this led drive circuit receive the 3rd direct voltage respectively as operating voltage, and this led drive circuit receives the 4th direct voltage and to this LED-backlit source supply voltage is provided whereby.
2. LED LCD TV as claimed in claim 1 is characterized in that, this current rectifying and wave filtering circuit comprises differential mode, common mode filtering circuit part and rectification circuit part.
3. LED LCD TV as claimed in claim 1 is characterized in that, this pfc circuit comprises pfc controller, mains switch, detection resistance, boost inductance, booster diode and dividing potential drop sample resistance; This boost inductance this first direct voltage of reception and this first direct voltage are connected to the negative terminal of booster diode through diode electrically; The negative terminal of this booster diode is as the output and the dividing potential drop sample resistance ground connection through being connected in series of this second direct voltage, and the anode of this booster diode is electrically connected to this boost inductance and passes through this mains switch and this detection grounding through resistance in regular turn; Node, the control end of this mains switch and the different pins that the node between this dividing potential drop sample resistance is electrically connected to this pfc controller respectively between this mains switch and this detection resistance.
4. LED LCD TV as claimed in claim 1 is characterized in that, this circuit of reversed excitation comprises anti-swash controller, anti-violent change depressor, mains switch, detection resistance, first output diode, second output diode and feedback circuit; The former limit winding of this anti-violent change depressor receives this second direct voltage and detects grounding through resistance through this mains switch and this in regular turn; The node between this mains switch and this detection resistance and the control end of this mains switch are electrically connected to this different pins that instead swash controller respectively; One end of the secondary winding of this anti-violent change depressor is through this first output diode output the 4th direct voltage, and the other end is through this second output diode output the 3rd direct voltage; This feedback circuit is electrically connected on the 3rd direct voltage and should instead swashs between the feedback pin of controller.
5. LED LCD TV as claimed in claim 4 is characterized in that, this feedback circuit has feedback input end and start/Opportunity awaiting control for linear end and comprises optical coupler, error amplifier, control switch, diode and first to the 6th resistance; An output of this optical coupler is electrically connected to this feedback pin and another output head grounding of instead swashing controller; An input of this optical coupler is electrically connected to this feedback input end through this first resistance, and another input is electrically connected to this feedback input end and passes through this error amplifier ground connection through this second resistance; The 3rd resistance and the 5th resistance string are connected between this feedback input end and the ground, and the node between the 3rd resistance and the 5th resistance is electrically connected to the control end of this error amplifier; One end of the 4th resistance is electrically connected to this feedback input end, and the other end is through this control switch ground connection and in regular turn through this diode and the 6th grounding through resistance, and the node between this diode and the 6th resistance is electrically connected to the control end of this error amplifier; The control end of this control switch is electrically connected to this start/Opportunity awaiting control for linear end, and this feedback input end is electrically connected to the 3rd direct voltage.
6. LED LCD TV as claimed in claim 1 is characterized in that, this led drive circuit comprises driving governor, inductance, diode, first control switch, the 7th resistance, second control switch and the 8th resistance; The 4th direct voltage is passed to the LED power end through this inductance and this diode in regular turn; Node between this inductance and this diode is in regular turn through this first control switch and the 7th grounding through resistance, and the control end of this first control switch is electrically connected to the driving pin of this driving governor; One end of this second control switch is electrically connected to the LED control end, and the other end is through the 8th grounding through resistance, and control end is electrically connected to the driving pin of this driving governor; Node between this second control switch and the 8th resistance is electrically connected to the feedback pin of this driving governor; This LED-backlit source is electrically connected between this LED power end and this LED control end.
7. LED LCD TV as claimed in claim 6 is characterized in that this led drive circuit more comprises switching circuit, and the 3rd direct voltage is electrically connected to the power pins of this driving governor via this switching circuit.
8. LED LCD TV as claimed in claim 6 is characterized in that this led drive circuit more comprises pulse-width modulation circuit, and this pulse-width modulation circuit is electrically connected to this driving governor and has a pulse-width signal input.
9. LED LCD TV as claimed in claim 6; It is characterized in that; This LED power end is the tenth resistance and the 11 grounding through resistance through being connected in series further, and the node between the tenth resistance and the 11 resistance is electrically connected to the breech lock pin of this driving governor.
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| CN2011205746890U CN202475621U (en) | 2011-12-31 | 2011-12-31 | Led liquid crystal television |
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| CN2011205746890U CN202475621U (en) | 2011-12-31 | 2011-12-31 | Led liquid crystal television |
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| CN102931848A (en) * | 2012-11-20 | 2013-02-13 | 冠捷显示科技（厦门）有限公司 | High-efficiency flyback power supply system applicable to liquid crystal display products |
| CN104135147A (en) * | 2014-07-30 | 2014-11-05 | 广州金升阳科技有限公司 | Synchronous switch circuit for PFC |
| TWI478471B (en) * | 2012-11-09 | 2015-03-21 | Tpv Electronics Fujian Co Ltd | Startup circuit of supply voltage for pfc circuit and switching power supply using the same |
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| TWI478471B (en) * | 2012-11-09 | 2015-03-21 | Tpv Electronics Fujian Co Ltd | Startup circuit of supply voltage for pfc circuit and switching power supply using the same |
| CN102931848A (en) * | 2012-11-20 | 2013-02-13 | 冠捷显示科技（厦门）有限公司 | High-efficiency flyback power supply system applicable to liquid crystal display products |
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| CN104135147A (en) * | 2014-07-30 | 2014-11-05 | 广州金升阳科技有限公司 | Synchronous switch circuit for PFC |
| WO2017076006A1 (en) * | 2015-11-02 | 2017-05-11 | 深圳创维－Rgb电子有限公司 | Constant-voltage and constant-current synchronous output power supply, and television |
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| CN105405410A (en) * | 2015-11-20 | 2016-03-16 | 青岛海信电器股份有限公司 | Backlight driving circuit and driving method and display device thereof |
| CN105323512B (en) * | 2015-11-23 | 2018-09-18 | 深圳创维－Rgb电子有限公司 | A kind of secondary control device of PFC power supplies |
| CN105323512A (en) * | 2015-11-23 | 2016-02-10 | 深圳创维－Rgb电子有限公司 | A PFC power supply secondary control device |
| CN106488607B (en) * | 2016-09-09 | 2018-04-10 | 深圳创维－Rgb电子有限公司 | Switching Power Supply and television set |
| CN106488607A (en) * | 2016-09-09 | 2017-03-08 | 深圳创维－Rgb电子有限公司 | Switching Power Supply and television set |
| WO2018192077A1 (en) * | 2017-04-20 | 2018-10-25 | 深圳市华星光电技术有限公司 | Television power source |
| US10341602B2 (en) | 2017-04-20 | 2019-07-02 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | TV power supply |
| CN111724747A (en) * | 2019-03-20 | 2020-09-29 | 海信视像科技股份有限公司 | Display device and power supply starting method |
| CN110247455A (en) * | 2019-06-26 | 2019-09-17 | 深圳创维－Rgb电子有限公司 | Television set |
| CN110247455B (en) * | 2019-06-26 | 2023-10-27 | 深圳创维－Rgb电子有限公司 | Television set |
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