WO2018058861A1 - 一种 oled 驱动电源装置及 oled 电视 - Google Patents

一种 oled 驱动电源装置及 oled 电视 Download PDF

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Publication number
WO2018058861A1
WO2018058861A1 PCT/CN2017/071023 CN2017071023W WO2018058861A1 WO 2018058861 A1 WO2018058861 A1 WO 2018058861A1 CN 2017071023 W CN2017071023 W CN 2017071023W WO 2018058861 A1 WO2018058861 A1 WO 2018058861A1
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WO
WIPO (PCT)
Prior art keywords
resistor
diode
capacitor
circuit
voltage
Prior art date
Application number
PCT/CN2017/071023
Other languages
English (en)
French (fr)
Inventor
蔡胜平
戴奇峰
韦宗旺
周建华
Original Assignee
深圳创维－Rgb电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳创维－Rgb电子有限公司 filed Critical 深圳创维－Rgb电子有限公司
Priority to US16/097,402 priority Critical patent/US10694138B2/en
Priority to EP17854323.7A priority patent/EP3444801B1/en
Publication of WO2018058861A1 publication Critical patent/WO2018058861A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/026—Arrangements or methods related to booting a display
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators

Definitions

  • the present invention relates to the field of power supply technologies, and in particular, to an OLED driving power supply device and an OLED television.
  • OLED organic light emitting diode Because it does not need backlight, no color filter and liquid crystal, and can emit light by itself, it is superior to traditional LCD and LED in terms of image quality, response speed, thickness and viewing angle. Therefore, in recent years, it has rapidly become a hot spot for research by major display manufacturers around the world. With the gradual maturity of OLED technology, TVs with OLED as a display solution will gradually replace traditional LCD and LED. TV. Therefore, there is a great need for a stable, high efficiency, low cost OLED power supply. At the same time, OLED is relatively traditional LCD, LED Television not only has a qualitative leap in image quality, but also has the characteristics of thin thickness and flexibility. Combining these characteristics, future OLED The appearance is more light, thin, and compact. In order to meet the appearance requirements, it is necessary to reduce the size of the power board.
  • the main board receives the standby signal, turns off the main line output in a certain sequence, and enters the standby state.
  • the outputs of the architecture are independent of each other, and the relationship between the two is clear and logical, which is convenient for timing control. But the overall architecture is more complicated, causing the power board to be too large and unsuitable.
  • the thin and light characteristics of OLED, how to avoid the contradiction between the novel and light design of OLED TV design and the excessive size of power board, is still urgently needed by researchers.
  • an object of the present invention is to provide an OLED driving power supply device and an OLED TV, by redesigning the power board architecture, eliminating the standby circuit and simplifying the circuit, not only meets the requirements of OLED for power supply output stability and timing, but also successfully reduces the size of the power board, perfectly solving the OLED.
  • the contradiction between the thin and light characteristics and the excessive size of the power board, while also reducing the power supply cost, is conducive to the popularity of OLED.
  • An OLED driving power supply device including a motherboard and an OLED a power board connected to the screen logic board, wherein the power board is provided with a power supply circuit, a first conversion module, a second conversion module, a switch, and a PFC circuit;
  • the power supply circuit After the power is turned on, the power supply circuit starts the PFC circuit according to the on/off signal output from the main board, and the PFC is activated by the PFC.
  • the circuit outputs a high voltage direct current to the first conversion module and the second conversion module, and the first conversion module converts the high voltage direct current into a first voltage and a second voltage to supply power to the main board, and the first enable signal output by the switch according to the main board Converting the first voltage to the first enable voltage
  • the OLED screen logic board supplies power; after a preset time, the main board outputs a second enable signal, and the power supply circuit controls the second conversion module to start according to the second enable signal, and converts the high voltage direct current into the second enable voltage to the OLED.
  • the screen logic board supplies power and illuminates the OLED screen.
  • the power supply circuit includes a switch control circuit and an enable switching circuit, and the switch control circuit outputs a third voltage to start the PFC according to the switch signal outputted by the main board.
  • a circuit outputting a fourth voltage to supply power to the first conversion module, and according to the PFC
  • the high voltage direct current output of the circuit outputs a fifth voltage; the enable switching circuit outputs the fifth voltage to the second conversion module according to the second enable signal outputted by the main board.
  • the first conversion module includes a first LLC controller and a first transformer, by the first LLC
  • the controller starts the first transformer according to the fourth voltage outputted by the switch control circuit; the first transformer converts the high voltage direct current outputted by the PFC circuit into the first voltage and the second voltage, and outputs the power to the main board.
  • the second conversion module includes a second LLC controller and a second transformer, by the second LLC The controller starts the second transformer according to the fifth voltage that enables the output of the switching circuit; the second transformer converts the high voltage direct current outputted by the PFC circuit into a second enable voltage to supply power to the logic board of the OLED panel.
  • the switch control circuit includes a first control sub-circuit and a second control sub-circuit, and the first control sub-circuit outputs a third voltage to start the PFC according to the switch signal outputted by the main board.
  • the circuit outputs a fourth voltage to supply power to the first conversion module; and the second control sub-circuit outputs a fifth voltage according to the high voltage DC output after the PFC is started.
  • the first conversion module further includes a standby step-down circuit for controlling the magnitudes of the first voltage and the second voltage output to the main board according to the switch signal.
  • the standby step-down circuit includes a first diode, a second diode, a third diode, a first resistor, a second resistor, a third resistor, a fourth resistor, and a fifth resistor.
  • An anode of the first diode is connected to the main board, and a cathode of the first diode is connected to one end of the second resistor, one end of the first capacitor, and a base of the first triode through a first capacitor;
  • the other end of the second resistor is grounded;
  • the other end of the first capacitor is grounded;
  • the emitter of the first transistor is grounded, and the collector of the first transistor is connected to one end of the seventh resistor through a third resistor, One end of the eighth resistor and one end of the third capacitor;
  • the anode of the second capacitor is connected to one end of the fourth resistor, the anode of the second diode, and the cathode of the third diode, and the cathode of the second capacitor is grounded
  • the other end of the fourth resistor is connected to the negative pole of the second diode;
  • the anode of the second diode is connected to one end of the fourth capacitor and the cathode of the first shunt reference source
  • the first control sub-circuit includes a fourth diode, a fifth diode, a sixth diode, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, and a fifteenth resistor , the sixteenth resistor, the seventeenth resistor, the eighteenth resistor, the nineteenth resistor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the second triode, the third triode, the fourth triode And a second optical coupling;
  • the anode of the fourth diode is connected to the main board, and the cathode of the fourth diode is connected to one end of the thirteenth resistor, one end of the fifth capacitor, and the base of the second triode through a twelfth resistor;
  • the other end of the thirteenth resistor is grounded;
  • the other end of the fifth capacitor is grounded;
  • the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the second photocoupler
  • the second leg of the second optocoupler and the one end of the fifteenth resistor are connected through the fourteenth resistor, and the other end of the fifteenth resistor is connected to the enable switching circuit;
  • the third of the second optocoupler The leg is connected to one end of the seventeenth resistor, the negative electrode of the fifth diode, and the base of the third diode through the sixteenth resistor, and the fourth photocoupler a leg is connected to the collector of the third transistor and the first conversion module; the other end of the seventeenth resistor is
  • the second control sub-circuit includes a twentieth resistance, a twenty-first resistance, a second twenty-second resistance, a twenty-third resistance, a twenty-fourth resistance, a twenty-fifth resistance, and a second Sixteen resistors, twenty-seventh resistors, twenty-eighth resistors, fifth triodes, seventh diodes, eighth diodes, ninth diodes, eighth capacitors, ninth capacitors, tenth Capacitor and second shunt reference source;
  • the emitter of the fifth triode is connected to the first control sub-circuit, and is connected to one end of the twenty-first resistor and the cathode of the second shunt reference source through a tens resistor, the base of the fifth triode Connecting the other end of the twenty-first resistor, the emitter of the fifth transistor is connected to the anode of the seventh diode, and the anode of the eighth diode is further connected by the twenty-second resistor;
  • the negative pole of the pole tube is connected to enable the switching circuit;
  • the negative pole of the eighth diode is connected to the negative pole of the ninth diode, the feedback leg of the second shunt reference source, and is also grounded through the eighth capacitor;
  • the second shunt reference The positive pole of the source is grounded;
  • the anode of the ninth diode is connected to one end of the twenty-fourth resistor, one end of the ninth capacitor, one end of the tenth capacitor, and one end of the twenty-eighth resistor through the twenty
  • the enable switching circuit includes a tenth diode, an eleventh diode, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a thirty-second resistor, a thirty-third resistor, and a third Eleven capacitors, sixth triode, seventh triode, and third optocoupler;
  • the anode of the tenth diode is connected to the main board, and the anode of the tenth diode is connected to one end of the thirtieth resistor, one end of the eleventh capacitor and the base of the sixth triode through the twenty-ninth resistor;
  • the other end of the thirtieth resistor is grounded; the other end of the eleventh capacitor is grounded; the emitter of the sixth triode is grounded, and the collector of the sixth triode is connected to the third optocoupler 2 feet;
  • the first leg of the third optocoupler is connected to the switch control circuit through the thirty-first resistor, the third of the third optocoupler
  • the leg is connected to one end of the thirty-third resistor, the negative pole of the eleventh diode, and the base of the seventh triode through a thirty-second resistor, the fourth photocoupler
  • the foot is connected to the switch control circuit and the collector of the seventh transistor; the emitter of the seventh transistor is connected to the second conversion module; the other end of the
  • An OLED television comprising the OLED driving power supply device as described above
  • the OLED driving power supply device includes a power board connected to the main board and the OLED screen logic board, wherein the power board is provided with a power supply circuit, a first conversion module, a second conversion module, a switch, and a PFC Circuit; after the power is turned on, the power supply circuit starts the PFC circuit according to the switch signal outputted by the main board, and is driven by the PFC.
  • the circuit outputs a high voltage direct current to the first conversion module and the second conversion module, and the first conversion module converts the high voltage direct current into a first voltage and a second voltage to supply power to the main board, and the first enable signal output by the switch according to the main board Converting the first voltage to the first enable voltage
  • the OLED screen logic board supplies power; after a preset time, the main board outputs a second enable signal, and the power supply circuit controls the second conversion module to start according to the second enable signal, and converts the high voltage direct current into the second enable voltage to the OLED.
  • the screen logic board supplies power to illuminate the OLED screen.
  • FIG. 1 is a schematic diagram of an OLED power supply architecture in the prior art
  • FIG. 2 is a schematic structural diagram of an OLED driving power supply device provided by the present invention.
  • FIG. 3 is a schematic diagram of a power supply circuit of an OLED driving power supply device provided by the present invention.
  • FIG. 4 is a structural block diagram of a first conversion module and a power supply circuit in an OLED driving power supply device provided by the present invention
  • FIG. 5 is a structural block diagram of a second conversion module and a power supply circuit in an OLED driving power supply device provided by the present invention
  • FIG. 6 is a circuit diagram of a standby step-down circuit in an OLED driving power supply device according to the present invention.
  • FIG. 7 is a circuit diagram of a switching machine control circuit in an OLED driving power supply device provided by the present invention.
  • FIG. 8 is a circuit diagram of an enable switching circuit in an OLED driving power supply device provided by the present invention.
  • FIG. 9 is a timing diagram of the power on/off of the OLED driving power supply device provided by the present invention.
  • the object of the present invention is to provide an OLED.
  • the drive power supply unit and OLED TV by redesigning the power board architecture, the standby circuit is eliminated, and the circuit is simplified, which not only satisfies the OLED
  • the requirements for power supply output stability and timing have also successfully reduced the size of the power board, which perfectly solves the contradiction between the thin and light characteristics of the OLED and the excessive size of the power board.
  • the OLED driving power supply device provided by the invention is suitable for adopting an organic light emitting diode (OLED) As a display solution, TV, monitor, audio-visual, rear-projection, plasma display, etc. display power drives in related fields.
  • OLED organic light emitting diode
  • the OLED driving power supply device includes a motherboard 20 a power board 10 connected to the OLED screen logic board 30, wherein the power board 10 is provided with a power supply circuit 11, a first conversion module 12, a second conversion module 13, and a switch 14 and PFC circuit 15, the power supply circuit 11 is connected to the first conversion module 12, the second conversion module 13, the PFC circuit 15, and the main board 20, the PFC circuit 15 is connected to the first conversion module 12 and the second conversion module 13, the first conversion module 12 is also connected to the main board 20, and the second conversion module 13 is also connected to the OLED screen logic board 30.
  • the switch 14 is connected to the main board 20 and the OLED screen logic board 30.
  • the power supply circuit 11 starts the PFC according to the power on/off signal output from the main board 20
  • the circuit 15 outputs a high voltage direct current HV_DC from the PFC circuit 15 to the first conversion module 12 and the second conversion module 13, and the high voltage direct current HV_DC is used by the first conversion module 12.
  • the main board 20 is powered by the first voltage (+12V in this embodiment) and the second voltage (+24V in this embodiment), and the first enable signal output by the switch 14 according to the main board 20 is output.
  • VDD_ON converts the first voltage into a first enable voltage (VDD_12V in this embodiment) to supply power to the OLED panel logic board 30; after a preset time, the motherboard 20 outputs a second enable signal.
  • the power supply circuit 11 controls the second conversion module 13 to start according to the second enable signal EVDD_ON, and the high voltage direct current HV_DC
  • the conversion to the second enable voltage (EVDD_24V in this embodiment) supplies power to the OLED panel logic board 30, thereby illuminating the OLED screen.
  • the invention will be creative OLED
  • the standby circuit in the power supply is omitted, and two separate outputs are used at the same time to facilitate timing control, which not only satisfies the stability and timing requirements, but also reduces the size of the power board 10 and reduces the power supply cost.
  • the power supply circuit 11 Including a switch control circuit (not shown) and an enable switching circuit (not shown), the switch control circuit is connected to the main board 20, the PFC circuit 15, and the first conversion module 12 And enabling the switching circuit, the enabling switching circuit is connected to the main board 20 and the second conversion module 13, and the switching machine control circuit outputs the third voltage according to the on/off signal output from the main board 20 PFC_VCC starts the PFC circuit 15 and outputs the fourth voltage VCC_VDD to supply power to the first conversion module 12, and according to the high voltage direct current HV_DC outputted by the PFC circuit 15
  • the fifth voltage PWM_VCC is output; the fifth voltage PWM_VCC is output to the second conversion module 13 by the enable switching circuit according to the second enable signal EVDD_ON outputted by the main board 20. powered by.
  • the switch control circuit includes a first control sub-circuit 1101 and a second control sub-circuit 1102, the first control sub-circuit 1101 is connected to the main board 20, the PFC circuit 15, the first conversion module 12 and the second control sub-circuit 1102, and the second control sub-circuit 1102 is connected to the PFC circuit 15 And enabling the switching circuit, the first control sub-circuit 1101 outputs a third voltage PFC_VCC according to the switch signal ON/OFF number outputted by the main board 20 to start the PFC circuit 15 And outputting the fourth voltage VCC_VDD to supply power to the first conversion module 12; the second control sub-circuit 1102 outputs the fifth voltage according to the high voltage DC HV_DC output after the PFC is started. PWM_VCC.
  • the first conversion module 12 includes the first The LLC controller 121 and the first transformer 122 connect the first LLC controller 121 and the main board 20, and the first LLC controller 121 Connecting the power supply circuit 11 , the first transformer 122 is started by the first LLC controller 121 according to the fourth voltage VCC_VDD output by the switch control circuit; the first transformer 122 The high voltage DC HV_DC outputted by the PFC circuit 15 is converted into a first voltage (+12V) and a second voltage (+24V), and the output is supplied to the main board 20, that is, the main circuit is provided with an auxiliary winding output.
  • VCC_VDD simultaneously supplies power to its own control IC and the first LLC controller 121, and the power supply circuit 11 will apply the first voltage (+12V) when the first enable signal VDD_ON is pulled high. ) is converted to the first enable voltage (ie VDD_12V) and the output 12V is applied to the OLED screen logic board 30.
  • the two-way power supply can operate.
  • the second conversion module 13 of the OLED driving voltage device provided by the present invention includes a second LLC controller 131 and a second transformer 132, and the second transformer 132 Connecting the second LLC controller 131 and the main board 20, the second LLC controller 131 is connected to the power supply circuit 11 when the switch 14 is based on the first enable signal output by the main board 20.
  • VDD_ON converts the first voltage into a first enable voltage (VDD_12V) to supply power to the OLED panel logic board 30, and after a preset time, the power supply circuit 11 is powered (ON/OFF) Pulling up, pulling up the second enable signal EVDD_ON, the second LLC controller 131 starts the second transformer 132 according to the fifth voltage PWM_VCC of the enable switching circuit output.
  • the second transformer 132 converts the high voltage DC HV_DC outputted by the PFC circuit 15 into a second enable voltage (EVDD_24V), and outputs 24V voltage to the OLED screen logic board.
  • Power which in turn lights up the OLED screen.
  • the first conversion module 12 of the present invention further includes a standby step-down circuit for controlling the output according to the switch signal.
  • Motherboard The first voltage and the second voltage of 20, when the switch signal ON/OFF is high (ie, the power-on signal), the standby buck circuit controls the first voltage and the second voltage to output normally 12V and 24V.
  • the standby buck circuit controls the first voltage and the second voltage drop to output 11V and 22V. Therefore, the standby loss is reduced, and at the same time, the present invention further avoids the problem of high loss by selecting a control IC having a polar standby loss, which has an Auto Standby Function ( Auto standby function), through the corresponding settings, can make the circuit enter Burst mode during standby, which can reduce standby power consumption.
  • Auto standby function Auto standby function
  • the standby buck circuit includes a first diode D1, a second diode D2, and a third diode D3.
  • the anode of the first diode D1 is connected to the main board 20 (for outputting the switch signal ON/OFF), the first diode D1
  • the negative pole is connected to one end of the second resistor R2, one end of the first capacitor C1 and the base of the first transistor Q1 through the first capacitor C1; the other end of the second resistor R2 is grounded; the first capacitor C1 The other end is grounded; the emitter of the first transistor Q1 is grounded, and the collector of the first transistor Q1 is connected to one end of the seventh resistor R7 through the third resistor R3, and the eighth resistor R8
  • One end of the second capacitor C2 and one end of the third capacitor C2 are connected to one end of the fourth resistor R4, the anode of the second diode D2, and the cathode of the third diode D3, the second capacitor C2
  • the other end of the fourth resistor R4 is connected to the cathode of the second diode D2; the anode of the second diode D2 is connected
  • the third leg of the first optocoupler U1 is grounded, the fourth leg of the first optocoupler U1 is connected to the main board 20; the anode of the first shunt reference source T1 is grounded, and the first transistor Q1 for For the NPN transistor, the model of the first optocoupler U1 is PC817, and the model of the first shunt reference source T1 is TL431.
  • the ON/OFF signal is pulled high, the first transistor Q1 is turned on, and the first shunt reference source T1
  • the resistance value of the feedback pin is a parallel connection of the third resistor R3, the fifth resistor R5 and the sixth resistor R6.
  • the normal voltage is output; when in the standby state, the ON/OFF signal is pulled low, the first three poles tube Q1 is turned off, the resistance value of the feedback pin of the first shunt reference source T1 is the fifth resistor R5 and the sixth resistor R6 are connected in parallel, and the resistance is reduced, thereby reducing the output voltage to 10.5V. Left and right, which reduces standby loss, allowing the system to work properly.
  • the first control sub-circuit 1101 includes a fourth diode D4 and a fifth diode D5. , sixth diode D6 , twelfth resistor R12 , thirteenth resistor R13 , fourteenth resistor R14 , fifteenth resistor R15 , sixteenth resistor R16 , seventeenth resistor R17 18th resistor R18, 19th resistor R19, fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, second transistor Q2, third transistor Q3, fourth transistor Q4 And the second optocoupler U2.
  • the anode of the fourth diode D4 is connected to the main board 20 (for inputting the switch signal ON/OFF), and the fourth diode D4
  • the negative pole is connected to one end of the thirteenth resistor R13, one end of the fifth capacitor C5, and the base of the second transistor Q2 through the twelfth resistor R12; the thirteenth resistor R13 The other end is grounded; the other end of the fifth capacitor C5 is grounded; the emitter of the second transistor Q2 is grounded, and the collector of the second transistor Q2 is connected to the second of the second photocoupler U2
  • the pin is further connected to the first leg of the second optocoupler U2 and one end of the fifteenth resistor R15 through the fourteenth resistor R14, and the other end of the fifteenth resistor R15 is connected to the enable switching circuit; the second optocoupler
  • the third pin of U2 is connected to one end of the seventeenth resistor R17, the negative pole of the fifth diode D5 and the base of the third diode D
  • the pin is connected to the collector of the third transistor Q3 and the first conversion module 12 (for outputting the fourth voltage VCC_VDD); the other end of the seventeenth resistor R17 is grounded; the fifth resistor R5 The anode of the third transistor Q3 is connected to the collector of the fourth transistor Q4, and the end of the nineteenth resistor R19 and the sixth diode D6 are connected through the eighteenth resistor R18.
  • the negative pole is also grounded through a sixth resistor R6; the other end of the nineteenth resistor R19 is grounded; the anode of the sixth diode D6 is grounded; and the base of the fourth transistor Q4 is connected to the sixth diode D6
  • the anode of the fourth transistor Q4 is connected to the PFC circuit 15 (for outputting the first voltage PFC_VCC) and the second control sub-circuit 1102, and also through the seventh capacitor C7. Ground.
  • the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are all NPNs.
  • the transistor, the fifth diode D5 and the sixth diode D6 are Zener diodes for protecting the third transistor Q3 and the fourth transistor Q4, and the second photocoupler U2 is of the type PC817 .
  • the fourth diode D4, the twelfth resistor R12, the thirteenth resistor R13 and the third capacitor C3 form a filter voltage dividing circuit, a twelfth resistor R12 and a thirteenth resistor R13
  • the divided voltage is the conduction voltage on the base of the second transistor Q2, determines the conduction state of the second transistor Q2, and the fifth capacitor C5 smoothes the on-voltage, when the remote control receives the power-on signal , motherboard 20
  • the power-on signal is output, and the ON/OFF signal is pulled high.
  • the first voltage and the second voltage both rise to the normal voltage, that is, 12V and 24V, and the main board 20 starts to work normally.
  • the second diode D2 Turning on, the second optocoupler U2 controls the supply voltage of the PFC chip ICE3PCS01.
  • the fourth transistor Q4 When the fourth transistor Q4 is turned on, the PFC chip starts to work, and the PFC circuit 15
  • the stabilized output 380V-400V high voltage DC HV_DC is fed back to the second control sub-circuit 1102.
  • the second control sub-circuit 1102 includes a twentieth resistor R20 and a twenty-first resistor R21. , the second twenty resistor R22, the twenty-third resistor R23, the twenty-fourth resistor R24, the twenty-fifth resistor R25, the twenty-sixth resistor R26, the twenty-seventh resistor R27, the twenty-eighth resistor R28, fifth transistor Q5, seventh diode D7, eighth diode D8, ninth diode D9, eighth capacitor C8, ninth capacitor C9, tenth capacitor C10 And the second shunt reference source T2.
  • the emitter of the fifth transistor Q5 is connected to the first control sub-circuit 1101, and the second eleventh resistor is also connected through the twentieth resistor R20.
  • One end of R21 and the negative pole of the second shunt reference source T2 the base of the fifth triode Q5 is connected to the other end of the twenty-first resistor R21, and the emitter of the fifth triode Q5 is connected to the seventh two Polar tube
  • the anode of D7 is further connected to the anode of the eighth diode D8 through the twenty-second resistor; the cathode of the seventh diode D7 is connected to enable the switching circuit (output fifth voltage PWM_VCC); the eighth pole tube
  • the negative pole of D8 is connected to the negative pole of the ninth diode D9, the feedback leg of the second shunt reference source T2, and is also grounded through the eighth capacitor C8; the anode of the second shunt reference source T2 is grounded; the ninth diode The anode of D9 is connected to one end of
  • One end of the twenty-fourth resistor R24 is grounded; the other end of the ninth capacitor C9 is grounded; the other end of the tenth capacitor C10 is grounded; the twenty-eighth resistor R28 The other end is connected in series with the twenty-seventh resistor R27, the twenty-sixth resistor R26, and the twenty-fifth resistor R25, and then connected to the PFC circuit 15 (input high voltage DC HV_DC).
  • the fifth transistor Q5 is a PNP transistor, and the twenty-fifth resistor R25 and the twenty-sixth resistor R26
  • the twenty-seventh resistor R27 and the twenty-eighth resistor R28 group component resistor group, the twentieth resistor R20 and the twenty-first resistor R21 are mainly used to adjust the fifth triode Q5
  • the seventh diode D7 is mainly used for DC blocking filtering to stabilize the output of the fifth voltage
  • the capacitor is mainly used for filtering smooth waveforms.
  • the high-voltage DC HC_DC is divided by a voltage dividing resistor to a voltage value higher than 2.5V, and the second shunt reference source
  • the second shunt reference source T2 is turned on so that the base of the fifth transistor Q5 is extremely low, and the fifth transistor Q5 is turned on, then the fifth voltage PWM_VCC
  • the subsequent pass enable switching circuit outputs the fifth voltage PWM_VCC to the second conversion module 13 when the second enable signal EVDD_ON is received.
  • the enabling switching circuit includes a tenth diode D10, an eleventh diode D11, and a twenty-ninth resistor.
  • the anode of the tenth diode D10 is connected to the main board 20 (for inputting the second enable signal EVDD_ON), the tenth diode
  • the negative pole of D10 is connected to one end of the thirtieth resistor R30, one end of the eleventh capacitor C11 and the base of the sixth triode Q6 through the twenty-ninth resistor R29; the thirtieth resistor R30 The other end is grounded; the other end of the eleventh capacitor C11 is grounded; the emitter of the sixth transistor Q6 is grounded, and the collector of the sixth transistor Q6 is connected to the second of the third photocoupler U3
  • the first leg of the third photocoupler U3 is connected to the switch control circuit through the thirty-first resistor R31, and the third pin of the third photocoupler U3 is connected to the thirty-third resistor through the thirty-second resistor R32.
  • R33, the negative pole of the eleventh diode D11 and the base of the seventh transistor Q7, and the fourth pin of the third photocoupler U3 is connected to the switch control circuit and the seventh transistor Q7
  • the collector of the seventh transistor Q7 is connected to the second conversion module 13; the other end of the thirty-third resistor R33 is grounded; the anode of the eleventh diode D11 is grounded.
  • the sixth transistor Q6 and the seventh transistor Q7 are both NPN transistors, and the eleventh diode D11
  • the Zener diode protects the seventh transistor Q7, and the thirty-second resistor R32 and the thirty-third resistor R33 are mainly used to adjust the conduction state of the seventh transistor Q7, and the tenth diode D10
  • the twenty-ninth resistor R29, the thirtieth resistor R30 and the eleventh capacitor C11 are mainly used for filtering the interference signal in the input second enable signal EVD_ON to smooth the waveform.
  • the third optocoupler U3 The model number is PC817, and the model of the first shunt reference source T1 is TL431.
  • the sixth transistor Q6 Turning on, the conduction of the third optocoupler U3 is increased, and the base voltage of the seventh transistor Q7 is increased. At this time, the seventh transistor Q7 is saturated, and the fifth voltage PWM_VCC is passed through the seventh transistor Q7.
  • the output is supplied to the second conversion module 13 for power supply, and the second conversion module 13 further converts the high voltage direct current into the second enable voltage to supply power to the OLED screen logic board 30 to illuminate the OLED screen.
  • FIG. 9 The timing chart of the switch of the OLED driving power supply device is shown in FIG. 9 , and the following is combined with FIG. 2 to FIG. 9 .
  • the boot process and standby process of the OLED drive power supply device provided by the present invention are described:
  • the first conversion module 12 When the power is turned on, when the power cord is plugged in, the first conversion module 12 will have about 11V and 22V, respectively.
  • the output of the motherboard 20 will give a high level ON/OFF signal when the remote controller receives the power-on signal.
  • the fourth transistor Q4 is turned on, and the power supply circuit 11 starts to give the PFC circuit 15
  • the PFC chip starts to work, and the rectified voltage is boosted to about 400V.
  • the ON/OFF signal is high, the standby buck circuit starts to switch to the normal working mode, that is, Q1 is turned on.
  • the output voltage of the first conversion module 12 rises from 11V and 22V to the normal values of 12V and 24V, and the main board 20 starts to work normally.
  • the motherboard 20 In order to light the screen, the motherboard 20 At this time, a VDD_ON signal will be given to the switch 14 at this time.
  • the switch 14 is turned on, and 12V is turned into VDD_12V, and the voltage of VDD_12V is given to T_CON.
  • the T-CON of the OLED screen requires 12V (VDD_12V) and 24V (EVDD_24V)
  • the two-way power supply can work, so after a preset time (ie, T2 time), the main board 20 gives a signal that EVDD_ON is pulled high, and the PFC circuit 15 feeds back 400V.
  • the fifth transistor Q5 is turned on, so that the PWM_VCC has a voltage, and the power supply circuit 11 outputs PWM_VCC to the second conversion module.
  • the second conversion module 13 starts to work, thereby outputting EVDD_24V to the T-CON.
  • the second enable voltage reaches a stable output, and the screen starts to work, thereby lighting the OLED. Screen.
  • the motherboard 20 When the motherboard 20 receives the standby signal, the motherboard 20 will first pull the EVDD_ON signal low, and the power supply circuit 11 The second conversion module 13 is not powered, and the main circuit EVDD_24V is no longer output. After that, the VDD_ON signal of the main board 20 is also pulled low, and the auxiliary circuit output is 12V. The VDD_12V switch is turned off, VDD_12V is no longer output, and after the T4 time, the main board 20 pulls the ON/OFF signal low again, and the PFC circuit 15 stops working.
  • the output voltage starts to drop from 12V, 24V, and finally drops to about 11V and 22V output, enters the buck standby mode, and the T5 time is not less than 30ms, guaranteeing the opening and closing.
  • the OELD screen will not be played at the same time as the motherboard 20, avoiding the flower screen.
  • the present invention also provides an OLED television comprising the OLED driving power supply device as described above, since the OLED has been
  • the drive power unit is described in detail and will not be described in detail here.
  • the OLED driving power supply device includes a power board connected to the main board and the OLED screen logic board, wherein the power board is provided with a power supply circuit, a first conversion module, a second conversion module, a switch, and a PFC Circuit; after the power is turned on, the power supply circuit starts the PFC circuit according to the switch signal outputted by the main board, and is driven by the PFC.
  • the circuit outputs a high voltage direct current to the first conversion module and the second conversion module, and the first conversion module converts the high voltage direct current into a first voltage and a second voltage to supply power to the main board, and the first enable signal output by the switch according to the main board Converting the first voltage to the first enable voltage
  • the OLED screen logic board supplies power; after a preset time, the main board outputs a second enable signal, and the power supply circuit controls the second conversion module to start according to the second enable signal, and converts the high voltage direct current into the second enable voltage to the OLED.
  • the screen logic board supplies power to illuminate the OLED screen.

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Abstract

一种OLED驱动电源装置及OLED电视，其中，所述OLED驱动电源装置包括与主板（20）和OLED屏逻辑板（30）连接的电源板（10），其中电源板（10）上设置有供电电路（11）、第一转换模块（12）、第二转换模块（13）、切换开关（14）和PFC电路（15）；接通电源后供电电路（11）根据主板（20）输出的开关机信号启动PFC电路（15）输出高压直流，第一转换模块（12）将高压直流转换为第一电压和第二电压给主板（20）供电，切换开关（14）将第一电压转换为第一使能电压给OLED屏逻辑板（30）供电；经预设时间后，第二转换模块（13）将高压直流转换为第二使能电压给OLED屏逻辑板（30）供电，点亮OLED屏，通过重新设计电源板（10）架构，省去了待机电路，精简电路，不仅满足了OLED对电源输出稳定性和时序性的要求，还成功缩小了电源板（10）体积，降低了电源成本，有利于OLED的普及。

Description

一种 OLED 驱动电源装置及 OLED 电视
技术领域
本发明涉及电源技术领域，特别涉及一种 OLED 驱动电源装置及 OLED 电视。
背景技术
OLED （ organic light emitting diode ）因其无需背光，无需彩色滤光片及液晶，并能自身发光，在画质、响应速度、厚度及可视角度等方面都优于传统的 LCD 和 LED ，故而近年来迅速成为全球各大显示厂商研究的热点。随着 OLED 技术的逐渐成熟，以 OLED 做为显示方案的电视将逐步取代传统的 LCD 、 LED 电视。因此非常需要一款性能稳定、高效率、低成本的 OLED 电源。同时 OLED 相对传统的 LCD 、 LED 电视不仅在画质上有了质的飞跃，还具有厚度薄、柔性等特性。结合这些特性，未来 OLED 的外观造型更加的轻薄、小型化、多样性。为了满足外观造型要求，非常有必要缩小电源板体积。
现有的 OLED 电视相对传统的 LCD 、 LED 电视对电源的时序要求更高 , 同时功率较大，这导致电源板的体积很大。现有的 OLED 电源往往采用多路独立单独控制输出。其工作架构如图 1 所示，所有主路都是相互独立并受主板信号控制。其中待机电路输出 5V 给主板供电，辅助绕组输出 VCC 给主路控制器 IC 及其他切换电路供电。当电视机上电时，电源输出 5V 给主板供电，主板工作后按照一定的时序使能主路依次输出。待机时，主板接受到待机信号，按照一定时序依次关掉主路输出，进入待机状态。该架构各路输出相互独立，各个之间关系明确逻辑清晰，便于时序控制。但整体架构比较复杂，造成电源板体积过大，不适应 OLED 轻薄的特性，如何避免 OLED 电视造型设计新颖轻薄和电源板体积过大之间的矛盾，还亟待研发人员解决。
因而现有技术还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本发明的目的在于提供一种 OLED 驱动电源装置及 OLED 电视，通过重新设计电源板架构，省去待机电路，精简电路，不仅满足了 OLED 对电源输出稳定性和时序性的要求，还成功缩小了电源板的体积，完美解决了 OLED 轻薄特性和电源板体积过大之间的矛盾，同时还降低了电源成本，有利于 OLED 的普及。
为了达到上述目的，本发明采取了以下技术方案：
一种 OLED 驱动电源装置，包括与主板和 OLED 屏逻辑板连接的电源板，其中，所述电源板上设置有供电电路、第一转换模块、第二转换模块、切换开关和 PFC 电路；
接通电源后供电电路根据主板输出的开关机信号启动 PFC 电路，由 PFC 电路输出高压直流至第一转换模块和第二转换模块，由第一转换模块将所述高压直流转换为第一电压和第二电压给主板供电，由切换开关根据主板输出的第一使能信号将第一电压转换为第一使能电压给 OLED 屏逻辑板供电；经过预设时间后，主板输出第二使能信号，由供电电路根据所述第二使能信号控制第二转换模块启动，将高压直流转换为第二使能电压给 OLED 屏逻辑板供电，点亮 OLED 屏。
所述的 OLED 驱动电源装置中，所述供电电路包括开关机控制电路和使能切换电路，由开关机控制电路根据主板输出的开关机信号输出第三电压启动 PFC 电路、输出第四电压给第一转换模块供电，并根据 PFC 电路输出的高压直流输出第五电压；由使能切换电路根据主板输出的第二使能信号将所述第五电压输出给第二转换模块供电。
所述的 OLED 驱动电源装置中，所述第一转换模块包括第一 LLC 控制器和第一变压器，由第一 LLC 控制器根据开关机控制电路输出的第四电压启动第一变压器；第一变压器将 PFC 电路输出的高压直流转换为第一电压和第二电压，输出给主板供电。
所述的 OLED 驱动电源装置中，所述第二转换模块包括第二 LLC 控制器和第二变压器，由第二 LLC 控制器根据使能切换电路输出的第五电压启动第二变压器；第二变压器将 PFC 电路输出的高压直流转换为第二使能电压给 OLED 屏逻辑板供电。
所述的 OLED 驱动电源装置中，所述开关机控制电路包括第一控制子电路和第二控制子电路，由第一控制子电路根据主板输出的开关机信号输出第三电压启动 PFC 电路并输出第四电压给第一转换模块供电；由第二控制子电路根据 PFC 启动后输出的高压直流输出第五电压。
所述的 OLED 驱动电源装置中，所述第一转换模块还包括待机降压电路，用于根据开关机信号控制输出至主板的第一电压和第二电压的大小。
所述的 OLED 驱动电源装置中，所述待机降压电路包括第一二极管、第二二极管、第三二极管、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第八电阻、第九电阻、第十电阻、第十一电阻、第一电容、第二电容、第三电容、第四电容、第一三极管、第一光耦和第一分流基准源；
所述第一二极管的正极连接主板，所述第一二极管的负极通过第一电容连接第二电阻的一端、第一电容的一端和第一三极管的基极；所述第二电阻的另一端接地；所述第一电容的另一端接地；所述第一三极管的发射极接地，所述第一三极管的集电极通过第三电阻连接第七电阻的一端、第八电阻的一端和第三电容的一端；所述第二电容的正极连接第四电阻的一端、第二二极管的正极和第三二极管的负极，所述第二电容的负极接地；所述第四电阻的另一端连接第二二极管的负极；所述第二二极管的正极连接第四电容的一端和第一分流基准源的负极；所述第五电阻的一端连接第一分流基准源的反馈脚、第四电容的另一端和第三电容的一端，所述第五电阻的另一端接地；所述第六电阻的一端连接第一分流基准源的反馈脚，所述第六电阻的一端接地；所述第七电阻的另一端连接主板；所述第八电阻的另一端连接 OLED 屏逻辑板、还通过第十一电阻连接第一光耦的第 1 脚；所述第九电阻的一端连接第三电容的另一端，所述第九电阻的另一端连接第十电阻的另一端、第一分流基准源的负极和第一光耦的第 2 脚；所述第一光耦的第 3 脚接地，所述第一光耦的第 4 脚连接主板；所述第一分流基准源的正极接地。
所述的 OLED 驱动电源装置中，所述第一控制子电路包括第四二极管、第五二极管、第六二极管、第十二电阻、第十三电阻、第十四电阻、第十五电阻、第十六电阻、第十七电阻、第十八电阻、第十九电阻、第五电容、第六电容、第七电容、第二三极管、第三三极管、第四三极管和第二光耦；
所述第四二极管的正极连接主板，所述第四二极管的负极通过第十二电阻连接第十三电阻的一端、第五电容的一端和第二三极管的基极；所述第十三电阻的另一端接地；所述第五电容的另一端接地；所述第二三极管的发射极接地，所述第二三极管的集电极连接第二光耦的第 2 脚、还通过第十四电阻连接第二光耦的第 1 脚和第十五电阻的一端，所述第十五电阻的另一端连接使能切换电路；所述第二光耦的第 3 脚通过第十六电阻连接第十七电阻的一端、第五二极管的负极和第三二极管的基极，所述第二光耦的第 4 脚连接第三三极管的集电极和第一转换模块；所述第十七电阻的另一端接地；第五电阻的正极接地；所述第三三极管的发射极连接第四三极管的集电极、通过第十八电阻连接第十九电阻的一端和第六二极管的负极、还通过第六电阻接地；所述第十九电阻的另一端接地；第六二极管的正极接地；所述第四三极管的基极连接第六二极管的负极，所述第四三极管的发射极连接 PFC 电路和第二控制子电路、还通过第七电容接地。
所述的 OLED 驱动电源装置中，所述第二控制子电路包括第二十电阻、第二十一电阻、第二二十电阻、第二十三电阻、第二十四电阻、第二十五电阻、第二十六电阻、第二十七电阻、第二十八电阻、第五三极管、第七二极管、第八二极管、第九二极管、第八电容、第九电容、第十电容和第二分流基准源；
所述第五三极管的发射极连接第一控制子电路、还通过第二十电阻连接第二十一电阻的一端和第二分流基准源的负极，所述第五三极管的基极连接第二十一电阻的另一端，所述第五三极管的发射极连接第七二极管的正极、还通过第二十二电阻连接第八二极管的正极；所述第七二极管的负极连接使能切换电路；所述第八二极管的负极连接第九二极管的负极、第二分流基准源的反馈脚、还通过第八电容接地；所述第二分流基准源的正极接地；所述第九二极管的正极通过第二十三电阻连接第二十四电阻的一端、第九电容的一端、第十电容的一端和第二十八电阻的一端；所述第二十四电阻的另一端接地；第九电容的另一端接地；第十电容的另一端接地；所述第二十八电阻的另一端依次与第二十七电阻、第二十六电阻、第二十五电阻串联后连接 PFC 电路。
所述使能切换电路包括第十二极管、第十一二极管、第二十九电阻、第三十电阻、第三十一电阻、第三十二电阻、第三十三电阻、第十一电容、第六三极管、第七三极管和第三光耦；
所述第十二极管的正极连接主板，所述第十二极管的负极通过第二十九电阻连接第三十电阻的一端、第十一电容一端和第六三极管的基极；所述第三十电阻的另一端接地；第十一电容的另一端接地；所述第六三极管的发射极接地，所述第六三极管的集电极连接第三光耦的第 2 脚；所述第三光耦的第 1 脚通过第三十一电阻连接开关机控制电路，所述第三光耦的第 3 脚通过第三十二电阻连接第三十三电阻的一端、第十一二极管的负极和第七三极管的基极，所述第三光耦的第 4 脚连接开关机控制电路和第七三极管的集电极；所述第七三极管的发射极连接第二转换模块；所述第三十三电阻的另一端接地；第十一二极管的正极接地。
一种 OLED 电视，其包括如上所述的 OLED 驱动电源装置
相较于现有技术，本发明提供的 OLED 驱动电源装置及 OLED 电视中，所述 OLED 驱动电源装置包括与主板和 OLED 屏逻辑板连接的电源板，其中所述电源板上设置有供电电路、第一转换模块、第二转换模块、切换开关和 PFC 电路；接通电源后供电电路根据主板输出的开关机信号启动 PFC 电路，由 PFC 电路输出高压直流至第一转换模块和第二转换模块，由第一转换模块将所述高压直流转换为第一电压和第二电压给主板供电，由切换开关根据主板输出的第一使能信号将第一电压转换为第一使能电压给 OLED 屏逻辑板供电；经过预设时间后，主板输出第二使能信号，由供电电路根据所述第二使能信号控制第二转换模块启动，将高压直流转换为第二使能电压给 OLED 屏逻辑板供电，点亮 OLED 屏，通过重新设计电源板架构，省去待机电路，精简电路，不仅满足了 OLED 对电源输出稳定性和时序性的要求，还成功缩小了电源板的体积，完美解决了 OLED 轻薄特性和电源板体积过大之间的矛盾，同时还降低了电源成本，有利于 OLED 的普及。
附图说明
图 1 为现有技术中 OLED 电源架构的示意图；
图 2 为本发明提供的 OLED 驱动电源装置的架构示意图；
图 3 为本发明提供的 OLED 驱动电源装置的供电线路示意图；
图 4 为本发明提供的 OLED 驱动电源装置中第一转换模块和供电电路的结构框图；
图 5 为本发明提供的 OLED 驱动电源装置中第二转换模块和供电电路的结构框图；
图 6 为本发明提供的 OLED 驱动电源装置中待机降压电路的电路图；
图 7 为本发明提供的 OLED 驱动电源装置中开关机控制电路的电路图；
图 8 为本发明提供的 OLED 驱动电源装置中使能切换电路的电路图；
图 9 为本发明提供的 OLED 驱动电源装置的开关机时序示意图。
具体实施方式
鉴于现有技术中 OLED 电源架构复杂、电源板体积过大 等缺点，本发明的目的在于提供 一种 OLED 驱动电源装置及 OLED 电视中，通过重新设计电源板架构，省去了待机电路，精简电路，不仅满足了 OLED 对电源输出稳定性和时序性的要求，还成功缩小了电源板体积，完美解决了 OLED 轻薄特性和电源板体积过大之间的矛盾 。
为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。 应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
本发明提供的 OLED 驱动电源装置适用于采用有机发光二极管（ OLED ）作为显示方案的电视、监视器、电教、背投、等离子显示等显示相关领域的电源驱动。请参阅图 2 和图 3 ，本发明提供的 OLED 驱动电源装置包括与主板 20 和 OLED 屏逻辑板 30 连接的电源板 10 ，其中，所述电源板 10 上设置有供电电路 11 、第一转换模块 12 、第二转换模块 13 、切换开关 14 和 PFC 电路 15 ，所述供电电路 11 连接第一转换模块 12 、第二转换模块 13 、 PFC 电路 15 和主板 20 ，所述 PFC 电路 15 连接第一转换模块 12 和第二转换模块 13 ，所述第一转换模块 12 还连接主板 20 ，所述第二转换模块 13 还连接 OLED 屏逻辑板 30 ，所述切换开关 14 连接主板 20 和 OLED 屏逻辑板 30 。接通电源后供电电路 11 根据主板 20 输出的开关机信号 ON/OFF 启动 PFC 电路 15 ，由 PFC 电路 15 输出高压直流 HV_DC 至第一转换模块 12 和第二转换模块 13 ，由第一转换模块 12 将所述高压直流 HV_DC 转换为第一电压（本实施例中为 +12V ）和第二电压（本实施例中为 +24V ）给主板 20 供电，由切换开关 14 根据主板 20 输出的第一使能信号 VDD_ON 将第一电压转换为第一使能电压（本实施例中为 VDD_12V ）给 OLED 屏逻辑板 30 供电；经过预设时间后，主板 20 输出第二使能信号 EVDD_ON ，由供电电路 11 根据所述第二使能信号 EVDD_ON 控制第二转换模块 13 启动，将高压直流 HV_DC 转换为第二使能电压（本实施例中为 EVDD_24V ）给 OLED 屏逻辑板 30 供电，从而点亮 OLED 屏。本发明创造性的将传统 OLED 电源中的待机电路省去，同时采用两路单独输出，便于时序控制，不仅满足了稳定性和时序性要求，同时还缩小了电源板 10 体积，降低了电源成本。
其中，所述供电电路 11 包括开关机控制电路（图中未示出）和使能切换电路（图中未示出），所述开关机控制电路连接主板 20 、 PFC 电路 15 、第一转换模块 12 和使能切换电路，所述使能切换电路连接主板 20 和第二转换模块 13 ，由开关机控制电路根据主板 20 输出的开关机信号 ON/OFF 输出第三电压 PFC_VCC 启动 PFC 电路 15 、输出第四电压 VCC_VDD 给第一转换模块 12 供电，并根据 PFC 电路 15 输出的高压直流 HV_DC 输出第五电压 PWM_VCC ；由使能切换电路根据主板 20 输出的第二使能信号 EVDD_ON 将所述第五电压 PWM_VCC 输出给第二转换模块 13 供电。
具体地，所述开关机控制电路包括第一控制子电路 1101 和第二控制子电路 1102 ，所述第一控制子电路 1101 连接主板 20 、 PFC 电路 15 、第一转换模块 12 和第二控制子电路 1102 ，所述第二控制子电路 1102 连接 PFC 电路 15 和使能切换电路，由第一控制子电路 1101 根据主板 20 输出的开关机信 ON/OFF 号输出第三电压 PFC_VCC 启动 PFC 电路 15 并输出第四电压 VCC_VDD 给第一转换模块 12 供电；由第二控制子电路 1102 根据 PFC 启动后输出的高压直流 HV_DC 输出第五电压 PWM_VCC 。
请一并参阅图 4 和图 5 ，本发明提供的 OLED 驱动电压装置中，所述第一转换模块 12 包括第一 LLC 控制器 121 和第一变压器 122 ，所述第一变压器 122 连接第一 LLC 控制器 121 和主板 20 ，所述第一 LLC 控制器 121 连接供电电路 11 ，由第一 LLC 控制器 121 根据开关机控制电路输出的第四电压 VCC_VDD 启动第一变压器 122 ；第一变压器 122 将 PFC 电路 15 输出的高压直流 HV_DC 转换为第一电压（ +12V ）和第二电压（ +24V ），输出给主板 20 供电，即该主路设置有一辅助绕组输出 VCC_VDD 同时给自身控制 IC 和第一 LLC 控制器 121 供电，另外供电电路 11 在第一使能信号 VDD_ON 拉高时，将第一电压（ +12V ）转换为第一使能电压（即 VDD_12V ），输出 12V 电压给 OLED 屏逻辑板 30 供电。
由于 OLED 屏逻辑板 30 需要 12V （ VDD_12V ）和 24V （ EVDD_24V ）两路供电才能工作，本发明提供的 OLED 驱动电压装置中第二转换模块 13 包括第二 LLC 控制器 131 和第二变压器 132 ，所述第二变压器 132 连接第二 LLC 控制器 131 和主板 20 ，所述第二 LLC 控制器 131 连接供电电路 11 ，当切换开关 14 根据主板 20 输出的第一使能信号 VDD_ON 将第一电压转换为第一使能电压（ VDD_12V ）给 OLED 屏逻辑板 30 供电，且经过预设时间后，此时供电电路 11 有电（ ON/OFF 拉高），拉高第二使能信号 EVDD_ON ，由第二 LLC 控制器 131 根据使能切换电路输出的第五电压 PWM_VCC 启动第二变压器 132 ；第二变压器 132 将 PFC 电路 15 输出的高压直流 HV_DC 转换为第二使能电压（ EVDD_24V ），输出 24V 电压给 OLED 屏逻辑板 30 供电，进而点亮 OLED 屏。通过两路主路的独立输出，加上切换电路使电源达到时序要求，同时避免了两路电压之间的干扰问题，保证系统工作的稳定性。
进一步地，由于本发明中主板 20 直接由 12V 供电，待机时需要主路一直在工作，而原来的待机只有 5V 输出。在相同的负载下，电压越高，损耗越大，因此为解决待机功耗大的问题，本发明中所述第一转换模块 12 还包括待机降压电路，用于根据开关机信号控制输出至主板 20 的第一电压和第二电压的大小，当开关机信号 ON/OFF 为高（即开机信号）时，待机降压电路控制第一电压和第二电压正常输出 12V 和 24V ，而当开关机信号 ON/OFF 为低（即关机信号）时，待机降压电路控制第一电压和第二电压降为输出 11V 和 22V ，从而降低待机损耗，同时，本发明通过选用具有极地的待机损耗的控制 IC 来进一步避免损耗高的问题，其具有 Auto Standby Function( 自动待机功能 ) ，通过相应的设置，可以在待机时使电路进入 Burst 模式，达到降低待机功耗的目的。
具体地，如图 6 所示，所述待机降压电路包括第一二极管 D1 、第二二极管 D2 、第三二极管 D3 、第一电阻 R1 、第二电阻 R2 、第三电阻 R3 、第四电阻 R4 、第五电阻 R5 、第六电阻 R6 、第七电阻 R7 、第八电阻 R8 、第九电阻 R9 、第十电阻 R10 、第十一电阻 R11 、第一电容 C1 、第二电容 C2 、第三电容 C3 、第四电容 C4 、第一三极管 Q1 、第一光耦 U1 和第一分流基准源 T1 。
所述第一二极管 D1 的正极连接主板 20 （用于输出开关机信号 ON/OFF ），所述第一二极管 D1 的负极通过第一电容 C1 连接第二电阻 R2 的一端、第一电容 C1 的一端和第一三极管 Q1 的基极；所述第二电阻 R2 的另一端接地；所述第一电容 C1 的另一端接地；所述第一三极管 Q1 的发射极接地，所述第一三极管 Q1 的集电极通过第三电阻 R3 连接第七电阻 R7 的一端、第八电阻 R8 的一端和第三电容 C3 的一端；所述第二电容 C2 的正极连接第四电阻 R4 的一端、第二二极管 D2 的正极和第三二极管 D3 的负极，所述第二电容 C2 的负极接地；所述第四电阻 R4 的另一端连接第二二极管 D2 的负极；所述第二二极管 D2 的正极连接第四电容 C4 的一端和第一分流基准源 T1 的负极；所述第五电阻 R5 的一端连接第一分流基准源 T1 的反馈脚、第四电容 C4 的另一端和第三电容 C3 的一端，所述第五电阻 R5 的另一端接地；所述第六电阻 R6 的一端连接第一分流基准源 T1 的反馈脚，所述第六电阻 R6 的一端接地；所述第七电阻 R7 的另一端连接主板 20 ；所述第八电阻 R8 的另一端连接 OLED 屏逻辑板 30 、还通过第十一电阻 R11 连接第一光耦 U1 的第 1 脚；所述第九电阻 R9 的一端连接第三电容 C3 的另一端，所述第九电阻 R9 的另一端连接第十电阻 R10 的另一端、第一分流基准源 T1 的负极和第一光耦 U1 的第 2 脚；所述第一光耦 U1 的第 3 脚接地，所述第一光耦 U1 的第 4 脚连接主板 20 ；所述第一分流基准源 T1 的正极接地，所述第一三极管 Q1 为 NPN 三极管，所述第一光耦 U1 的型号为 PC817 ，所述第一分流基准源 T1 的型号为 TL431 。
在开机状态时， ON/OFF 信号拉高，第一三极管 Q1 导通，第一分流基准源 T1 的反馈脚的电阻值为第三电阻 R3 、第五电阻 R5 和第六电阻 R6 三个电阻并联，此时输出正常电压；当处于待机状态时， ON/OFF 信号被拉低，第一三极管 Q1 截止关闭，第一分流基准源 T1 的反馈脚的电阻值为第五电阻 R5 和第六电阻 R6 并联，电阻减少，从而将输出电压降低到 10.5V 左右，进而降低了待机损耗，使得系统可正常工作。
进一步地，请一并参阅图 7 ，所述第一控制子电路 1101 包括第四二极管 D4 、第五二极管 D5 、第六二极管 D6 、第十二电阻 R12 、第十三电阻 R13 、第十四电阻 R14 、第十五电阻 R15 、第十六电阻 R16 、第十七电阻 R17 、第十八电阻 R18 、第十九电阻 R19 、第五电容 C5 、第六电容 C6 、第七电容 C7 、第二三极管 Q2 、第三三极管 Q3 、第四三极管 Q4 和第二光耦 U2 。
所述第四二极管 D4 的正极连接主板 20 （用于输入开关机信号 ON/OFF ），所述第四二极管 D4 的负极通过第十二电阻 R12 连接第十三电阻 R13 的一端、第五电容 C5 的一端和第二三极管 Q2 的基极；所述第十三电阻 R13 的另一端接地；所述第五电容 C5 的另一端接地；所述第二三极管 Q2 的发射极接地，所述第二三极管 Q2 的集电极连接第二光耦 U2 的第 2 脚、还通过第十四电阻 R14 连接第二光耦 U2 的第 1 脚和第十五电阻 R15 的一端，所述第十五电阻 R15 的另一端连接使能切换电路；所述第二光耦 U2 的第 3 脚通过第十六电阻 R16 连接第十七电阻 R17 的一端、第五二极管 D5 的负极和第三二极管 D3 的基极，所述第二光耦 U2 的第 4 脚连接第三三极管 Q3 的集电极和第一转换模块 12 （用于输出第四电压 VCC_VDD ）；所述第十七电阻 R17 的另一端接地；第五电阻 R5 的正极接地；所述第三三极管 Q3 的发射极连接第四三极管 Q4 的集电极、通过第十八电阻 R18 连接第十九电阻 R19 的一端和第六二极管 D6 的负极、还通过第六电阻 R6 接地；所述第十九电阻 R19 的另一端接地；第六二极管 D6 的正极接地；所述第四三极管 Q4 的基极连接第六二极管 D6 的负极，所述第四三极管 Q4 的发射极连接 PFC 电路 15 （用于输出第一电压 PFC_VCC ）和第二控制子电路 1102 、还通过第七电容 C7 接地。
本实施例中，所述第二三极管 Q2 、第三三极管 Q3 和第四三极管 Q4 均为 NPN 三极管，所述第五二极管 D5 和第六二极管 D6 为稳压二极管，可保护第三三极管 Q3 和第四三极管 Q4 ，所述第二光耦 U2 的型号为 PC817 。所述第四二极管 D4 、第十二电阻 R12 、第十三电阻 R13 和第三电容 C3 组成滤波分压电路，第十二电阻 R12 和第十三电阻 R13 的分压为第二三极管 Q2 基极上的导通电压，决定第二三极管 Q2 的导通状态，第五电容 C5 对导通电压进行平滑滤波处理，当遥控接收到开机信号后，主板 20 输出开机信号，及 ON/OFF 信号拉高，此时第一电压和第二电压均上升至正常电压即 12V 和 24V ，主板 20 开始正常工作，此时第二二极管 D2 导通，经过第二光耦 U2 控制 PFC 芯片 ICE3PCS01 的供电电压，当第四三极管 Q4 导通时， PFC 芯片开始工作， PFC 电路 15 将经过升压输出一个稳定的 380V-400V 的高压直流 HV_DC 反馈给第二控制子电路 1102 。
请继续参阅图 7 ，所述第二控制子电路 1102 包括第二十电阻 R20 、第二十一电阻 R21 、第二二十电阻 R22 、第二十三电阻 R23 、第二十四电阻 R24 、第二十五电阻 R25 、第二十六电阻 R26 、第二十七电阻 R27 、第二十八电阻 R28 、第五三极管 Q5 、第七二极管 D7 、第八二极管 D8 、第九二极管 D9 、第八电容 C8 、第九电容 C9 、第十电容 C10 和第二分流基准源 T2 。
所述第五三极管 Q5 的发射极连接第一控制子电路 1101 、还通过第二十电阻 R20 连接第二十一电阻 R21 的一端和第二分流基准源 T2 的负极，所述第五三极管 Q5 的基极连接第二十一电阻 R21 的另一端，所述第五三极管 Q5 的发射极连接第七二极管 D7 的正极、还通过第二十二电阻连接第八二极管 D8 的正极；所述第七二极管 D7 的负极连接使能切换电路（输出第五电压 PWM_VCC ）；所述第八二极管 D8 的负极连接第九二极管 D9 的负极、第二分流基准源 T2 的反馈脚、还通过第八电容 C8 接地；所述第二分流基准源 T2 的正极接地；所述第九二极管 D9 的正极通过第二十三电阻 R23 连接第二十四电阻 R24 的一端、第九电容 C9 的一端、第十电容 C10 的一端和第二十八电阻 R28 的一端；所述第二十四电阻 R24 的另一端接地；第九电容 C9 的另一端接地；第十电容 C10 的另一端接地；所述第二十八电阻 R28 的另一端依次与第二十七电阻 R27 、第二十六电阻 R26 、第二十五电阻 R25 串联后连接 PFC 电路 15 （输入高压直流 HV_DC ）。
本实施例中，所述第五三极管 Q5 为 PNP 三极管，所述第二十五电阻 R25 、第二十六电阻 R26 、第二十七电阻 R27 和第二十八电阻 R28 组成分压电阻组，第二十电阻 R20 和第二十一电阻 R21 主要用于调整第五三极管 Q5 的导通状态，第七二极管 D7 主要用于隔直滤波，稳定第五电压的输出，电容主要用于滤波平滑波形。当 PFC 电路 15 经过升压输出一个稳定的 380V-400V 的高压直流 HV_DC 反馈给第二控制子电路 1102 后，高压直流 HC_DC 经过分压电阻分压为高于 2.5V 的电压值第二分流基准源 T2 的反馈脚，第二分流基准源 T2 导通使得第五三极管 Q5 的基极为低电平，第五三极管 Q5 导通，则此时第五电压 PWM_VCC 有电压，后续经过使能切换电路在接收到第二使能信号 EVDD_ON 为高时，将第五电压 PWM_VCC 输出给第二转换模块 13 供电。
具体地，请一并参阅图 8 ，所述使能切换电路包括第十二极管 D10 、第十一二极管 D11 、第二十九电阻 R29 、第三十电阻 R30 、第三十一电阻 R31 、第三十二电阻 R32 、第三十三电阻 R33 、第十一电容 C11 、第六三极管 Q6 、第七三极管 Q7 和第三光耦 U3 。
所述第十二极管 D10 的正极连接主板 20 （用于输入第二使能信号 EVDD_ON ），所述第十二极管 D10 的负极通过第二十九电阻 R29 连接第三十电阻 R30 的一端、第十一电容 C11 一端和第六三极管 Q6 的基极；所述第三十电阻 R30 的另一端接地；第十一电容 C11 的另一端接地；所述第六三极管 Q6 的发射极接地，所述第六三极管 Q6 的集电极连接第三光耦 U3 的第 2 脚；所述第三光耦 U3 的第 1 脚通过第三十一电阻 R31 连接开关机控制电路，所述第三光耦 U3 的第 3 脚通过第三十二电阻 R32 连接第三十三电阻 R33 的一端、第十一二极管 D11 的负极和第七三极管 Q7 的基极，所述第三光耦 U3 的第 4 脚连接开关机控制电路和第七三极管 Q7 的集电极；所述第七三极管 Q7 的发射极连接第二转换模块 13 ；所述第三十三电阻 R33 的另一端接地；第十一二极管 D11 的正极接地。
本实施例中，所述第六三极管 Q6 和第七三极管 Q7 均为 NPN 三极管，所述第十一二极管 D11 为稳压二极管，可保护第七三极管 Q7 ，所述第三十二电阻 R32 和第三十三电阻 R33 主要用于调整第七三极管 Q7 的导通状态，第十二极管 D10 、第二十九电阻 R29 、第三十电阻 R30 和第十一电容 C11 主要用于滤除输入的第二使能信号 EVD_ON 中的干扰信号，平滑其波形。所述第三光耦 U3 的型号为 PC817 ，所述第一分流基准源 T1 的型号为 TL431 。当接收到主板 20 输出的第二使能信号 EVDD_ON 为高时，第六三极管 Q6 导通，使得第三光耦 U3 导通量增加，第七三极管 Q7 的基极电压升高，此时第七三极管 Q7 饱和导通，第五电压 PWM_VCC 经过第七三极管 Q7 后输出给第二转换模块 13 供电，第二转换模块 13 进而将高压直流转换为第二使能电压给 OLED 屏逻辑板 30 供电，点亮 OLED 屏。
本发明提供 OLED 驱动电源装置的开关机时序示意图如图 9 所示，以下结合图 2 至图 9 对本发明提供的 OLED 驱动电源装置的开机过程和待机过程进行说明：
开机时，当插上电源线，第一转换模块 12 会分别有约 11V 和 22V 的输出，当遥控器接收到开机信号时，主板 20 会给出高电平的 ON/OFF 信号，此时第四三极管 Q4 导通，供电电路 11 开始给 PFC 电路 15 供电， PFC 芯片开始工作，将整流后的电压升压到约 400V ；同时当 ON/OFF 信号为高时，此时待机降压电路开始切换为正常工作模式，即 Q1 导通，约 T1 时间后第一转换模块 12 的输出电压由 11V 和 22V 左右上升至正常值 12V 和 24V ，主板 20 正常开始工作。为了点亮屏幕，主板 20 此时会先给出一个 VDD_ON 信号给切换开关 14 ，此时切换开关 14 打开，将 12V 转为 VDD_12V ，将 VDD_12V 的电压给 T_CON （即 OLED 屏逻辑板 30 ），但 OLED 屏的 T-CON 需要 12V(VDD_12V) 和 24V(EVDD_24V) 两路供电才能工作，因此经过预设时间（即 T2 时间）后，主板 20 再给出一个 EVDD_ON 拉高的信号，而 PFC 电路 15 反馈的 400V 高压直流在经过分压后使得第五三极管 Q5 导通，使 PWM_VCC 有电压，此时供电电路 11 会输出 PWM_VCC 给第二转换模块 13 供电，第二转换模块 13 开始工作，从而输出 EVDD_24V 给 T-CON ，经过 T3 时间后第二使能电压达到稳定输出，屏体开始工作，进而点亮 OLED 屏。
当主板 20 接受到待机信号时，主板 20 会首先会将 EVDD_ON 信号拉低，此时供电电路 11 不在给第二转换模块 13 供电，此时主路 EVDD_24V 不再输出，之后，主板 20 的 VDD_ON 信号也被拉低，此时辅路输出的 12V 转 VDD_12V 的开关断开， VDD_12V 不再输出，最后经过 T4 时间后主板 20 再将 ON/OFF 信号拉低， PFC 电路 15 停止工作，再经过 T5 时间后输出电压由 12V ， 24V 开始下降，最终降为约 11V 和 22V 输出，进入降压待机模式，其中 T5 时间不少于 30ms ，保证启闭 OELD 屏不会与主板 20 同时进行，避免出现花屏。
本发明还相应提供一种 OLED 电视，其包括如上所述的 OLED 驱动电源装置，由于上文已对所述 OLED 驱动电源装置进行了详细描述，此处不作详述。
综上所述，本发明提供的 OLED 驱动电源装置及 OLED 电视中，所述 OLED 驱动电源装置包括与主板和 OLED 屏逻辑板连接的电源板，其中所述电源板上设置有供电电路、第一转换模块、第二转换模块、切换开关和 PFC 电路；接通电源后供电电路根据主板输出的开关机信号启动 PFC 电路，由 PFC 电路输出高压直流至第一转换模块和第二转换模块，由第一转换模块将所述高压直流转换为第一电压和第二电压给主板供电，由切换开关根据主板输出的第一使能信号将第一电压转换为第一使能电压给 OLED 屏逻辑板供电；经过预设时间后，主板输出第二使能信号，由供电电路根据所述第二使能信号控制第二转换模块启动，将高压直流转换为第二使能电压给 OLED 屏逻辑板供电，点亮 OLED 屏，通过重新设计电源板架构，省去待机电路，精简电路，不仅满足了 OLED 对电源输出稳定性和时序性的要求，还成功缩小了电源板的体积，完美解决了 OLED 轻薄特性和电源板体积过大之间的矛盾，同时还降低了电源成本，有利于 OLED 的普及。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。

Claims (18)

  1. 一种 OLED 驱动电源装置，包括与主板和 OLED 屏逻辑板连接的电源板，其特征在于，所述电源板上设置有供电电路、第一转换模块、第二转换模块、切换开关和 PFC 电路；
    接通电源后供电电路根据主板输出的开关机信号启动 PFC 电路，由 PFC 电路输出高压直流至第一转换模块和第二转换模块，由第一转换模块将所述高压直流转换为第一电压和第二电压给主板供电，由切换开关根据主板输出的第一使能信号将第一电压转换为第一使能电压给 OLED 屏逻辑板供电；经过预设时间后，主板输出第二使能信号，由供电电路根据所述第二使能信号控制第二转换模块启动，将高压直流转换为第二使能电压给 OLED 屏逻辑板供电，点亮 OLED 屏。
  2. 根据权利要求 1 所述的 OLED 驱动电源装置，其特征在于，所述供电电路包括开关机控制电路和使能切换电路，由开关机控制电路根据主板输出的开关机信号输出第三电压启动 PFC 电路、输出第四电压给第一转换模块供电，并根据 PFC 电路输出的高压直流输出第五电压；由使能切换电路根据主板输出的第二使能信号将所述第五电压输出给第二转换模块供电。
  3. 根据权利要求 2 所述的 OLED 驱动电源装置，其特征在于，所述第一转换模块包括第一 LLC 控制器和第一变压器，由第一 LLC 控制器根据开关机控制电路输出的第四电压启动第一变压器；第一变压器将 PFC 电路输出的高压直流转换为第一电压和第二电压，输出给主板供电。
  4. 根据权利要求 2 所述的 OLED 驱动电源装置，其特征在于，所述第二转换模块包括第二 LLC 控制器和第二变压器，由第二 LLC 控制器根据使能切换电路输出的第五电压启动第二变压器；第二变压器将 PFC 电路输出的高压直流转换为第二使能电压给 OLED 屏逻辑板供电。
  5. 根据权利要求 2 所述的 OLED 驱动电源装置，其特征在于，所述开关机控制电路包括第一控制子电路和第二控制子电路，由第一控制子电路根据主板输出的开关机信号输出第三电压启动 PFC 电路并输出第四电压给第一转换模块供电；由第二控制子电路根据 PFC 启动后输出的高压直流输出第五电压。
  6. 根据权利要求 3 所述的 OLED 驱动电源装置，其特征在于，所述第一转换模块还包括待机降压电路，用于根据开关机信号控制输出至主板的第一电压和第二电压的大小。
  7. 根据权利要求 6 所述的 OLED 驱动电源装置，其特征在于，所述待机降压电路包括第一二极管、第二二极管、第三二极管、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第八电阻、第九电阻、第十电阻、第十一电阻、第一电容、第二电容、第三电容、第四电容、第一三极管、第一光耦和第一分流基准源；
    所述第一二极管的正极连接主板，所述第一二极管的负极通过第一电容连接第二电阻的一端、第一电容的一端和第一三极管的基极；所述第二电阻的另一端接地；所述第一电容的另一端接地；所述第一三极管的发射极接地，所述第一三极管的集电极通过第三电阻连接第七电阻的一端、第八电阻的一端和第三电容的一端；所述第二电容的正极连接第四电阻的一端、第二二极管的正极和第三二极管的负极，所述第二电容的负极接地；所述第四电阻的另一端连接第二二极管的负极；所述第二二极管的正极连接第四电容的一端和第一分流基准源的负极；所述第五电阻的一端连接第一分流基准源的反馈脚、第四电容的另一端和第三电容的一端，所述第五电阻的另一端接地；所述第六电阻的一端连接第一分流基准源的反馈脚，所述第六电阻的一端接地；所述第七电阻的另一端连接主板；所述第八电阻的另一端连接 OLED 屏逻辑板、还通过第十一电阻连接第一光耦的第 1 脚；所述第九电阻的一端连接第三电容的另一端，所述第九电阻的另一端连接第十电阻的另一端、第一分流基准源的负极和第一光耦的第 2 脚；所述第一光耦的第 3 脚接地，所述第一光耦的第 4 脚连接主板；所述第一分流基准源的正极接地。
  8. 根据权利要求 5 所述的 OLED 驱动电源装置，其特征在于，所述第一控制子电路包括第四二极管、第五二极管、第六二极管、第十二电阻、第十三电阻、第十四电阻、第十五电阻、第十六电阻、第十七电阻、第十八电阻、第十九电阻、第五电容、第六电容、第七电容、第二三极管、第三三极管、第四三极管和第二光耦；
    所述第四二极管的正极连接主板，所述第四二极管的负极通过第十二电阻连接第十三电阻的一端、第五电容的一端和第二三极管的基极；所述第十三电阻的另一端接地；所述第五电容的另一端接地；所述第二三极管的发射极接地，所述第二三极管的集电极连接第二光耦的第 2 脚、还通过第十四电阻连接第二光耦的第 1 脚和第十五电阻的一端，所述第十五电阻的另一端连接使能切换电路；所述第二光耦的第 3 脚通过第十六电阻连接第十七电阻的一端、第五二极管的负极和第三二极管的基极，所述第二光耦的第 4 脚连接第三三极管的集电极和第一转换模块；所述第十七电阻的另一端接地；第五电阻的正极接地；所述第三三极管的发射极连接第四三极管的集电极、通过第十八电阻连接第十九电阻的一端和第六二极管的负极、还通过第六电阻接地；所述第十九电阻的另一端接地；第六二极管的正极接地；所述第四三极管的基极连接第六二极管的负极，所述第四三极管的发射极连接 PFC 电路和第二控制子电路、还通过第七电容接地。
  9. 根据权利要求 5 所述的 OLED 驱动电源装置，其特征在于，所述第二控制子电路包括第二十电阻、第二十一电阻、第二二十电阻、第二十三电阻、第二十四电阻、第二十五电阻、第二十六电阻、第二十七电阻、第二十八电阻、第五三极管、第七二极管、第八二极管、第九二极管、第八电容、第九电容、第十电容和第二分流基准源；
    所述第五三极管的发射极连接第一控制子电路、还通过第二十电阻连接第二十一电阻的一端和第二分流基准源的负极，所述第五三极管的基极连接第二十一电阻的另一端，所述第五三极管的发射极连接第七二极管的正极、还通过第二十二电阻连接第八二极管的正极；所述第七二极管的负极连接使能切换电路；所述第八二极管的负极连接第九二极管的负极、第二分流基准源的反馈脚、还通过第八电容接地；所述第二分流基准源的正极接地；所述第九二极管的正极通过第二十三电阻连接第二十四电阻的一端、第九电容的一端、第十电容的一端和第二十八电阻的一端；所述第二十四电阻的另一端接地；第九电容的另一端接地；第十电容的另一端接地；所述第二十八电阻的另一端依次与第二十七电阻、第二十六电阻、第二十五电阻串联后连接 PFC 电路。
  10. 一种 OLED 电视，其特征在于，包括 OLED 驱动电源装置，所述 OLED 驱动电源装置包括与主板和 OLED 屏逻辑板连接的电源板，其中，所述电源板上设置有供电电路、第一转换模块、第二转换模块、切换开关和 PFC 电路；
    接通电源后供电电路根据主板输出的开关机信号启动 PFC 电路，由 PFC 电路输出高压直流至第一转换模块和第二转换模块，由第一转换模块将所述高压直流转换为第一电压和第二电压给主板供电，由切换开关根据主板输出的第一使能信号将第一电压转换为第一使能电压给 OLED 屏逻辑板供电；经过预设时间后，主板输出第二使能信号，由供电电路根据所述第二使能信号控制第二转换模块启动，将高压直流转换为第二使能电压给 OLED 屏逻辑板供电，点亮 OLED 屏。
  11. 根据权利要求 10 所述的 OLED 电视，其特征在于，所述供电电路包括开关机控制电路和使能切换电路，由开关机控制电路根据主板输出的开关机信号输出第三电压启动 PFC 电路、输出第四电压给第一转换模块供电，并根据 PFC 电路输出的高压直流输出第五电压；由使能切换电路根据主板输出的第二使能信号将所述第五电压输出给第二转换模块供电。
  12. 根据权利要求 11 所述的 OLED 电视，其特征在于，所述第一转换模块包括第一 LLC 控制器和第一变压器，由第一 LLC 控制器根据开关机控制电路输出的第四电压启动第一变压器；第一变压器将 PFC 电路输出的高压直流转换为第一电压和第二电压，输出给主板供电。
  13. 根据权利要求 11 所述的 OLED 电视，其特征在于，所述第二转换模块包括第二 LLC 控制器和第二变压器，由第二 LLC 控制器根据使能切换电路输出的第五电压启动第二变压器；第二变压器将 PFC 电路输出的高压直流转换为第二使能电压给 OLED 屏逻辑板供电。
  14. 根据权利要求 11 所述的 OLED 电视，其特征在于，所述开关机控制电路包括第一控制子电路和第二控制子电路，由第一控制子电路根据主板输出的开关机信号输出第三电压启动 PFC 电路并输出第四电压给第一转换模块供电；由第二控制子电路根据 PFC 启动后输出的高压直流输出第五电压。
  15. 根据权利要求 12 所述的 OLED 电视，其特征在于，所述第一转换模块还包括待机降压电路，用于根据开关机信号控制输出至主板的第一电压和第二电压的大小。
  16. 根据权利要求 15 所述的 OLED 电视，其特征在于，所述待机降压电路包括第一二极管、第二二极管、第三二极管、第一电阻、第二电阻、第三电阻、第四电阻、第五电阻、第六电阻、第七电阻、第八电阻、第九电阻、第十电阻、第十一电阻、第一电容、第二电容、第三电容、第四电容、第一三极管、第一光耦和第一分流基准源；
    所述第一二极管的正极连接主板，所述第一二极管的负极通过第一电容连接第二电阻的一端、第一电容的一端和第一三极管的基极；所述第二电阻的另一端接地；所述第一电容的另一端接地；所述第一三极管的发射极接地，所述第一三极管的集电极通过第三电阻连接第七电阻的一端、第八电阻的一端和第三电容的一端；所述第二电容的正极连接第四电阻的一端、第二二极管的正极和第三二极管的负极，所述第二电容的负极接地；所述第四电阻的另一端连接第二二极管的负极；所述第二二极管的正极连接第四电容的一端和第一分流基准源的负极；所述第五电阻的一端连接第一分流基准源的反馈脚、第四电容的另一端和第三电容的一端，所述第五电阻的另一端接地；所述第六电阻的一端连接第一分流基准源的反馈脚，所述第六电阻的一端接地；所述第七电阻的另一端连接主板；所述第八电阻的另一端连接 OLED 屏逻辑板、还通过第十一电阻连接第一光耦的第 1 脚；所述第九电阻的一端连接第三电容的另一端，所述第九电阻的另一端连接第十电阻的另一端、第一分流基准源的负极和第一光耦的第 2 脚；所述第一光耦的第 3 脚接地，所述第一光耦的第 4 脚连接主板；所述第一分流基准源的正极接地。
  17. 根据权利要求 14 所述的 OLED 电视，其特征在于，所述第一控制子电路包括第四二极管、第五二极管、第六二极管、第十二电阻、第十三电阻、第十四电阻、第十五电阻、第十六电阻、第十七电阻、第十八电阻、第十九电阻、第五电容、第六电容、第七电容、第二三极管、第三三极管、第四三极管和第二光耦；
    所述第四二极管的正极连接主板，所述第四二极管的负极通过第十二电阻连接第十三电阻的一端、第五电容的一端和第二三极管的基极；所述第十三电阻的另一端接地；所述第五电容的另一端接地；所述第二三极管的发射极接地，所述第二三极管的集电极连接第二光耦的第 2 脚、还通过第十四电阻连接第二光耦的第 1 脚和第十五电阻的一端，所述第十五电阻的另一端连接使能切换电路；所述第二光耦的第 3 脚通过第十六电阻连接第十七电阻的一端、第五二极管的负极和第三二极管的基极，所述第二光耦的第 4 脚连接第三三极管的集电极和第一转换模块；所述第十七电阻的另一端接地；第五电阻的正极接地；所述第三三极管的发射极连接第四三极管的集电极、通过第十八电阻连接第十九电阻的一端和第六二极管的负极、还通过第六电阻接地；所述第十九电阻的另一端接地；第六二极管的正极接地；所述第四三极管的基极连接第六二极管的负极，所述第四三极管的发射极连接 PFC 电路和第二控制子电路、还通过第七电容接地。
  18. 根据权利要求 14 所述的 OLED 电视，其特征在于，所述第二控制子电路包括第二十电阻、第二十一电阻、第二二十电阻、第二十三电阻、第二十四电阻、第二十五电阻、第二十六电阻、第二十七电阻、第二十八电阻、第五三极管、第七二极管、第八二极管、第九二极管、第八电容、第九电容、第十电容和第二分流基准源；
    所述第五三极管的发射极连接第一控制子电路、还通过第二十电阻连接第二十一电阻的一端和第二分流基准源的负极，所述第五三极管的基极连接第二十一电阻的另一端，所述第五三极管的发射极连接第七二极管的正极、还通过第二十二电阻连接第八二极管的正极；所述第七二极管的负极连接使能切换电路；所述第八二极管的负极连接第九二极管的负极、第二分流基准源的反馈脚、还通过第八电容接地；所述第二分流基准源的正极接地；所述第九二极管的正极通过第二十三电阻连接第二十四电阻的一端、第九电容的一端、第十电容的一端和第二十八电阻的一端；所述第二十四电阻的另一端接地；第九电容的另一端接地；第十电容的另一端接地；所述第二十八电阻的另一端依次与第二十七电阻、第二十六电阻、第二十五电阻串联后连接 PFC 电路。
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US10694138B2 (en) 2020-06-23
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