WO2017096664A1 - 驱动电路 - Google Patents

驱动电路 Download PDF

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Publication number
WO2017096664A1
WO2017096664A1 PCT/CN2015/099779 CN2015099779W WO2017096664A1 WO 2017096664 A1 WO2017096664 A1 WO 2017096664A1 CN 2015099779 W CN2015099779 W CN 2015099779W WO 2017096664 A1 WO2017096664 A1 WO 2017096664A1
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WO
WIPO (PCT)
Prior art keywords
module
boosting
power
switch
control unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2015/099779
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English (en)
French (fr)
Inventor
曹丹
张先明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/907,536 priority Critical patent/US9842554B2/en
Publication of WO2017096664A1 publication Critical patent/WO2017096664A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter

Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a driving circuit for a liquid crystal display.
  • the driving circuit of the existing DC-DC converter generally adopts single-channel boosting, and the temperature of some devices is high under high power conditions. If a simple multi-step boosting is used, the temperature of the components will be lowered, but the cost of the control chip is low. Will increase accordingly.
  • the invention provides a driving circuit, which can select different working modes according to the output power to disperse power, improve efficiency, and effectively solve the problem of low efficiency and high component temperature under high power conditions, and Will not increase the cost of the control chip.
  • the invention provides a driving circuit for a liquid crystal display, the driving circuit comprises a boosting module, a power management module, a power detecting module and a micro control unit, the power management module and the boosting module and the micro control unit Connected, the boosting module, the power detecting module and the micro control unit are sequentially connected, the power detecting module detects an output power of the boosting module, and the micro control unit switches the working of the boosting module according to the output power. mode.
  • the micro control unit includes first and second critical powers, wherein the first critical point power is less than the second critical point power, and the boosting module has first, second, and third operating modes when the output When the power is less than the first critical power, the micro control unit switches the boosting module to the first working mode, and when the output power is greater than the first critical power and less than the second critical power, the micro control unit Switching the boosting module to the second working mode, when the output power is greater than the second critical power, the micro control unit switches the boosting module to the third working mode.
  • the boosting module includes a first boosting submodule, a second boosting submodule, a third boosting submodule, and a fourth boosting submodule, and each boosting submodule includes a first switch and a second switch.
  • An inductor, a diode and a first resistor the first switch is connected to the power supply at one end, and the other end is connected to the second switch via the inductor, the second switch is connected to the inductor at one end, and the other end is grounded via the first resistor, the diode One end is connected between the first switch and the inductor, and the other end forms an output end.
  • the first switch is connected to the micro control unit, and the second switch is connected to the power management module.
  • the first switch is an N-channel metal oxide semiconductor (MOS) transistor, and the second switch is a P-channel MOS transistor; a source of the first switch is connected to a power source, and a gate is connected to the a micro control unit, the drain is connected to the second switch via the inductor; the source of the second switch is grounded via the first resistor, the gate is connected to the power management module, and the drain is connected to the drain of the first switch .
  • MOS metal oxide semiconductor
  • the first switch of the first boosting submodule and the third boosting submodule is turned off, and the first of the second boosting submodule and the fourth boosting submodule is The switch is turned on; when the boosting module is in the second working mode, the first switches of the first to third boosting sub-modules are turned on, and the first switch of the fourth boosting sub-module is turned off; when the rising When the voltage module is in the third working mode, the first switches of the first to fourth boosting sub-modules are all turned on.
  • the power management module includes a ground pin, a driving pin, a current detecting pin and a current output pin; the ground pin is grounded, and the driving pin is respectively connected to the second switch of the boosting submodule, and is controlled. Turning on and off, thereby controlling the on and off of the corresponding diode; the current detecting pin is respectively connected between the second switch of the boosting submodule and the first resistor, detecting the flow through the first resistor The magnitude of the current that is connected to the micro control unit to supply current to it.
  • the power detection module includes a current detecting module and a multiplier connected thereto, the current detecting module detects an output current of the boosting module, and the multiplier multiplies the output current by an output voltage of the boosting module.
  • the output power of the boost module is obtained after the operation and sent to the micro control unit.
  • the current detecting module is a photocoupler.
  • the photocoupler includes a first end, a second end, a third end, and a fourth end.
  • the diode of the boosting sub-module of the first end is connected, and the second end is connected to the output end.
  • the terminal is connected to the power supply via the second resistor, and the fourth end is grounded via the third resistor, and one end of the multiplier is connected to the third end to obtain the current detected by the photocoupler, and the other end obtains the output voltage of the boost module. After multiplication The output power of the boost module is obtained.
  • the micro control unit includes a power pin, a switch control pin and a current pin, and the power pin is connected to the power detection module to obtain the detected power, and the switch control pin and the booster The first switch of the module is connected to control its conduction and cut-off, thereby switching its working mode.
  • the driving circuit of the present invention can select different working modes according to the output power of the boosting module, thereby dispersing the power, improving the efficiency, and effectively solving the efficiency under the high power condition. Low and the component temperature is too high.
  • FIG. 1 is a circuit diagram of a drive circuit of an embodiment of the present invention.
  • FIG. 2 is a timing diagram of a control signal outputted by a micro control unit (MCU) in a first operating mode of a boosting circuit of a driving circuit of an embodiment of the present invention.
  • MCU micro control unit
  • FIG 3 is a timing diagram of a control signal output by the MCU in the second operating mode of the boosting circuit of the driving circuit of the embodiment of the present invention.
  • FIG. 4 is a timing diagram of a control signal output by the MCU in the third operating mode of the boosting circuit of the driving circuit of the embodiment of the present invention.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined.
  • the ground connection, or the integral connection may be a mechanical connection; it may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • FIG. 1 is a circuit diagram of a driving circuit of the present invention.
  • the driving circuit 100 is used in a liquid crystal display, and includes a boosting module 10 , a power management module 20 , a power detecting module 30 , and a Micro Controller Unit (MCU) 50 .
  • the power management module 20 is electrically connected to the boosting module 10 and the MCU 50.
  • the boosting module 10, the power detecting module 30 and the MCU 50 are electrically connected in sequence, and the power detecting module 30 detects the rising The output power of the module 10 is switched, and the MCU 50 switches the operating mode of the boosting module 10 according to the output power.
  • the boosting module 10 includes a boosting sub-module 11 to form a multi-way boosting structure.
  • boosting sub-modules which are respectively a first boosting sub-module 11 and a second boosting sub-port.
  • Each boost sub-module includes a first switch Q1, a second switch Q2, an inductor L, a diode D, a capacitor C, and a first resistor R1.
  • the first switch Q1 is connected to the power supply VCC at one end, and the other end is connected to the second switch Q2 via the inductor L.
  • the second switch Q2 is connected to the inductor L, and the other end is grounded via the first resistor R1. It is connected between the first switch Q1 and the inductor L, and the other end forms an output terminal VOUT.
  • the first switch Q1 is connected to the MCU 50, and the second switch Q2 is connected to the power management module 20.
  • the diode D can be a backlight module of a liquid crystal display, and when it is turned on, the liquid crystal display is illuminated.
  • the first switch Q1 is an N-channel MOS transistor
  • the second switch Q2 is a P-channel MOS transistor.
  • the source S of the first switch Q1 is connected to the power source VCC
  • the gate G is connected to the MCU 50
  • the drain D is connected to the second switch Q2 via the inductor L.
  • the source S of the second switch Q2 is grounded via a first resistor R1
  • the gate G is connected to the power management module 20
  • the drain D is connected to the drain D of the first switch Q1.
  • One end of the diode D is connected to the drain D of the first switch Q1 and the second switch Q2, and the other end is connected to the power detecting module 30, and is also grounded via the capacitor C. It can be understood that the capacitance C can be omitted.
  • the boosting module 10 includes a first working mode, a second working mode, and a third working mode, wherein when the boosting module 10 is in the first working mode, the first boosting submodule The first switch Q1 of the first boosting sub-module 11 and the first switch Q1 of the third boosting sub-module 14 are turned off; the first switch Q1 of the second boosting sub-module 12 and the first switch Q1 of the fourth boosting sub-module 14 are turned on; When the boosting module 10 is in the second working mode, the first switch Q1 of the first to third boosting sub-modules 13 is turned on, and the first switch Q1 of the fourth boosting sub-module 14 is turned off; When the boosting module 10 is in the third operating mode, the first switches Q2 of the first to fourth boosting sub-modules are all turned on. It can be understood that the number of working modes of the boosting module 10 can be correspondingly increased or decreased according to the increase or decrease of the number of boosting submodules.
  • the power management module 20 includes a ground pin GND, drive pins Gate1 to Gate4, current detecting pins lsen1 to lsen4, and current output pins A0 and A1.
  • the ground pin GND is grounded.
  • the driving pins Gate1 to Gate4 are respectively connected to the second switches Q2 of the four boosting sub-modules 11.
  • the driving pins Gate1 to Gate4 and the four boosting sub-modules 11 and The gate G of the second switch Q2 is connected to control its turn-on and turn-off, thereby controlling the turn-on and turn-off of the corresponding diode D.
  • the current detecting pins lsen1 to lsen4 are respectively connected between the source S of the second switch Q2 of the four boosting sub-modules 11 and the first resistor R1 to detect the current flowing through the first resistor R1.
  • the current output pins A0, A1 are connected to the MCU 50 to supply current thereto.
  • the power detection module 30 includes a current detecting module 31 and a multiplier 33 connected thereto.
  • the current detecting module 31 detects the output current of the boosting module, and the multiplier 33 multiplies the output current by the output voltage of the boosting module 10 to obtain the output power of the boosting module 10, and sends the output power to the current MCU 50.
  • the output voltage of the boost module 10 can be supplied to the multiplier 33 by the MCU 50.
  • the current detecting module 31 is a photocoupler 31.
  • the photocoupler 31 is configured to detect an output current flowing through the four boost sub-modules 11.
  • the photocoupler 31 includes a first End 311, second end 312, third end 313 and fourth end 314.
  • the first end 311 is connected to the diode D of the four boost sub-modules 11.
  • the second end 312 is coupled to the output terminal VOUT.
  • the third terminal 313 is connected to the power source VCC via the second resistor R2.
  • the fourth terminal 314 is grounded via a third resistor R3.
  • One end of the multiplier 33 is connected to the third end 313 to obtain the current detected by the photocoupler 31, and the other end obtains the voltage coefficient, and the multiplication operation is performed to obtain the output power of the boosting module 10.
  • the MCU 50 includes a power pin 51, switch control pins G1 to G4, and current pins 53, 55.
  • the power pin 51 is connected to the multiplier 33 for obtaining the detected power.
  • the switch control pins G1 to G4 are respectively connected to the gates G of the first switches Q1 of the four boosting sub-modules 11, 12, 13, 14 for outputting control signals to control the on and off of the first switch Q1. Thereby, the operating mode of the boosting module 10 is switched.
  • the current pin 53 is connected to the current output pins A0, A1 of the power management module 10.
  • the MCU 50 has a first critical power and a second critical power, wherein the first critical power is less than the second critical power, and the MCU 50 is based on the output power and the first and second thresholds. In the case of the magnitude of the power, the operating mode of the boosting module 10 is switched.
  • the photocoupler 31 detects the output current of the boosting module 10, and after multiplying by the multiplier 33, the output power is obtained.
  • the MCU 50 switches the working mode of the boosting module 10 according to the output power.
  • the MCU 50 switches the boosting module 10 to the first working mode, specifically Referring to FIG.
  • the switch control pins G1 to G4 respectively output control signals Gate1 to Gate4, wherein the control signals Gate1 and Gate3 have a first delay Delay1 and are low level, so that the first booster
  • the first switch Q1 of the module 11 and the third boosting sub-module 13 is turned off, and the first switch Q1 of the second boosting sub-module 12 and the fourth boosting sub-module 14 is turned on, when the output power is greater than the first threshold
  • the MCU 50 switches the boosting module 10 to the second working mode. Specifically, referring to FIG.
  • the switch control pins G1 to G4 respectively output a control signal Gate1 to Gate4, wherein the control signals Gate1, Gate2 have a second delay Delay2, and the control signals Gate1, Gate2 and Gate3 are at a low level, so that the first switches Q1 of the first to third boosting sub-modules 11, 12, 13 are both Turned on, the fourth boost sub-module 14
  • the switch Q1 is turned off.
  • the MCU 50 switches the boosting module 10 to the third operating mode. Specifically, referring to FIG.
  • the switch control pins G1 to G4 respectively Output control signals Gate1 to Gate4, wherein the control signals Gate1, Gate2 have a third delay Delay2,
  • the control signals Gate1 to Gate4 are both at a low level, so that the first switches Q1 of the first to fourth boosting sub-modules 11, 12, 13, 14 are all turned on.
  • the driving circuit 100 can select different working modes according to the output power of the boosting module 10, thereby dispersing the power, improving the efficiency, and effectively solving the high power condition.
  • the problem of low efficiency and high component temperature does not increase the cost of the control chip.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

一种驱动电路（100），其用于液晶显示器，其特征在于，该驱动电路（100）包括升压模块（10）、电源管理模块（20）、功率侦测模块（30）及微控制单元（50），该电源管理模块（20）与该升压模块（10）及该微控制单元（50）相连，该升压模块（10）、该功率侦测模块（30）及该微控制单元（50）依次连接，该功率侦测模块（30）侦测该升压模块（10）的输出功率，该微控制单元（50）根据该输出功率切换该升压模块（10）的工作模式。该驱动电路（100）可根据输出功率的大小选择不同的工作模式从而将功率进行分散，提升效率，有效地解决大功率条件下，效率过低以及元器件温度过高的问题，且不会增加控制芯片的成本。

Description

驱动电路
本发明要求2015年12月8日递交的发明名称为“驱动电路”的申请号201510896526.7的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示领域，尤其是涉及一种用于液晶显示器的驱动电路。
背景技术
现有的DC-DC转换器的驱动电路一般采用单路升压，大功率条件下部分器件的温度较高，如采用简单的多路升压，元器件的温度会降低，但是控制芯片的成本会相应增加。
发明内容
本发明提供一种驱动电路，其可根据输出功率的大小选择不同的工作模式从而将功率进行分散，提升效率，有效地解决大功率条件下，效率过低以及元器件温度过高的问题，且不会增加控制芯片的成本。
本发明提供了一种驱动电路，其用于液晶显示器，该驱动电路包括升压模块、电源管理模块、功率侦测模块及微控制单元，该电源管理模块与该升压模块及该微控制单元相连，该升压模块、该功率侦测模块及该微控制单元依次连接，该功率侦测模块侦测该升压模块的输出功率，该微控制单元根据该输出功率切换该升压模块的工作模式。
其中，该微控制单元包括第一及第二临界功率，其中，该第一临界点功率小于该第二临界点功率，该升压模块具有第一、第二及第三工作模式，当该输出功率小于该第一临界功率时，该微控制单元将该升压模块切换至该第一工作模式，当该输出功率大于该第一临界功率，且小于该第二临界功率时，该微控制单元将该升压模块切换至该第二工作模式，当该输出功率大于该第二临界功率时，该微控制单元将该升压模块切换至该第三工作模式。
其中，该升压模块包括第一升压子模块、第二升压子模块、第三升压子模块及第四升压子模块，每一升压子模块均包括第一开关、第二开关、电感、二极管及第一电阻；该第一开关一端连接电源，另一端经该电感连接至该第二开关，该第二开关一端与该电感相连，另一端经该第一电阻接地，该二极管一端连接至第一开关与该电感之间，另一端形成输出端，该第一开关与该微控制单元相连，该第二开关与该电源管理模块相连。
其中，该第一开关为N沟道金属氧化物半导体(metal oxide semiconductor，MOS)管，该第二开关为P沟道MOS管；该第一开关的源极连接至电源，栅极连接至该微控制单元，漏极经该电感连接至该第二开关；该第二开关的源极经该第一电阻接地，栅极连接至该电源管理模块，漏极与该第一开关的漏极相连。
其中，当该升压模块处于第一工作模式时，第一升压子模块及第三升压子模块的第一开关截止，该第二升压子模块及第四升压子模块的第一开关导通；当该升压模块处于第二工作模式时，该第一至第三升压子模块的第一开关均导通，该第四升压子模块的第一开关截止；当该升压模块处于第三工作模式时，该第一至第四升压子模块的第一开关均导通。
其中，该电源管理模块包括接地引脚、驱动引脚、电流侦测引脚及电流输出引脚；该接地引脚接地，该驱动引脚分别与该升压子模块的第二开关相连，控制其导通及截止，进而控制对应的二极管的导通及截止；该电流侦测引脚分别至该升压子模块的第二开关的与第一电阻之间，侦测流经第一电阻的电流大小，该电流控制引脚与该微控制单元相连，向其提供电流。
其中，该功率侦测模块包括电流侦测模块及与其相连的乘法器，该电流侦测模块侦测升压模块的输出电流，该乘法器将该输出电流与该升压模块的输出电压进行乘法运算后得到该升压模块的输出功率，并发送至该微控制单元。
其中，该电流侦测模块为光电耦合器。
其中，该光电耦合器包括第一端、第二端、第三端及第四端，该第一端的该升压子模块的二极管相连，该第二端与该输出端相连，该第三端经第二电阻连接至电源，该第四端经第三电阻接地，该乘法器一端与该第三端相连，获取光电耦合器所侦测的电流，另一端获取该升压模块的输出电压，经过乘法运算 后得到该升压模块的输出功率。
其中，该微控制单元包括功率引脚、开关控制引脚及电流引脚，该功率引脚与该功率侦测模块相连，获取其侦测所得的功率，该开关控制引脚与该升压子模块的第一开关相连，控制其导通及截止，从而切换其工作模式。
相较于现有技术，本发明所述的驱动电路可根据升压模块的输出功率的大小选择不同的工作模式，从而将功率进行分散，提升效率，可有效地解决大功率条件下，效率过低以及元器件温度过高的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明的实施例的驱动电路的电路图。
图2为本发明的实施例的驱动电路的升压电路处于第一工作模式下微控制单元(Microcontroller Unit，MCU)输出的控制信号的时序图。
图3为本发明的实施例的驱动电路的升压电路处于第二工作模式下，MCU输出的控制信号的时序图。
图4为本发明的实施例的驱动电路的升压电路处于第三工作模式下，MCU输出的控制信号的时序图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
此外，以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明中所提到的方向用语，例如，“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“侧面”等，仅是参考附加图式的方向，因此，使 用的方向用语是为了更好、更清楚地说明及理解本发明，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸地连接，或者一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。若本说明书中出现“工序”的用语，其不仅是指独立的工序，在与其它工序无法明确区别时，只要能实现该工序所预期的作用则也包括在本用语中。另外，本说明书中用“～”表示的数值范围是指将“～”前后记载的数值分别作为最小值及最大值包括在内的范围。在附图中，结构相似或相同的单元用相同的标号表示。
请参阅图1，图1为本发明的驱动电路的电路图。如图1所示，该驱动电路100用于液晶显示器，其包括升压模块10、电源管理模块20、功率侦测模块30及微控制单元(Microcontroller Unit，MCU)50。该电源管理模块20与该升压模块10及该MCU 50电性相连，该升压模块10、该功率侦测模块30及该MCU 50依次电性连接，该功率侦测模块30侦测该升压模块10的输出功率，该MCU 50根据该输出功率切换该升压模块10的工作模式。
该升压模块10包括升压子模块11，形成多路升压结构，在本较佳实施例中，共有四个升压子模块，分别为第一升压子模块11、第二升压子模块12、第三升压子模块13及第四升压子模块14。每一升压子模块均包括第一开关Q1、第二开关Q2、电感L、二极管D、电容C及第一电阻R1。该第一开关Q1一端连接电源VCC，另一端经该电感L连接至该第二开关Q2，该第二开关Q2一端与该电感L相连，另一端经该第一电阻R1接地，该二极管D一端连接至第一开关Q1与该电感L之间，另一端形成输出端VOUT，该第一开关Q1与该MCU 50相连，该第二开关Q2与该电源管理模块20相连。该二极管D可为液晶显示器的背光模组，当其导通时，该液晶显示器被点亮。
在本较佳实施例中，该第一开关Q1为N沟道MOS管，该第二开关Q2为P沟道MOS管。该第一开关Q1的源极S连接至电源VCC，栅极G连接至MCU 50，漏极D经电感L连接第二开关Q2。该第二开关Q2的源极S经第一电阻R1接地，栅极G连接至电源管理模块20，漏极D与第一开关Q1的漏极D相连。该二极管D一端与第一开关Q1与第二开关Q2的漏极D相连，另一端与该功率侦测模块30，同时还经电容C接地。可以理解，该电容C可省略。
在本较佳实施例中，该升压模块10包括第一工作模式、第二工作模式及第三工作模式，其中，当该升压模块10处于第一工作模式时，第一升压子模块11的第一开关Q1及第三升压子模块13的第一开关Q1截止，第二升压子模块12的第一开关Q1及第四升压子模块14的第一开关Q1导通；当该升压模块10处于第二工作模式时，该第一至第三升压子模块的13的第一开关Q1均导通，该第四升压子模块14的第一开关Q1截止；当该升压模块10处于第三工作模式时，该第一至第四升压子模块的第一开关Q2均导通。可以理解，该升压模块10的工作模式的数量可根据升压子模块的数量的增减进行相应的增减。
该电源管理模块20包括接地引脚GND、驱动引脚Gate1至Gate4、电流侦测引脚lsen1至lsen4及电流输出引脚A0、A1。该接地引脚GND接地。该驱动引脚Gate1至Gate4分别与四个升压子模块11的第二开关Q2相连，在本较佳实施例中，该驱动引脚Gate1至Gate4分别与四个升压子模块11的与第二开关Q2的栅极G相连，以控制其导通及截止，进而控制对应的二极管D的导通及截止。该电流侦测引脚lsen1至lsen4分别至四个升压子模块11的第二开关Q2的源极S与第一电阻R1之间，侦测流经第一电阻R1的电流大小。该电流输出引脚A0、A1与MCU 50相连，向其提供电流。
该功率侦测模块30包括电流侦测模块31及与其相连的乘法器33。该电流侦测模块31侦测升压模块的输出电流，该乘法器33将该输出电流与该升压模块10的输出电压进行乘法运算后得到该升压模块10的输出功率，并发送至该MCU 50。该升压模块10的输出电压可由该MCU 50提供至该乘法器33。
在本较佳实施例中，该电流侦测模块31为光电耦合器31。该光电耦合器31用于侦测流经四个升压子模块11的输出电流。该光电耦合器31包括第一 端311、第二端312、第三端313及第四端314。该第一端311与四个升压子模块11的二极管D相连。该第二端312与输出端VOUT相连。该第三端313经第二电阻R2连接至电源VCC。该第四端314经第三电阻R3接地。该乘法器33一端与该第三端313相连，获取光电耦合器31所侦测的电流，另一端获取电压系数，经过乘法运算后得到该升压模块10的输出功率。
该MCU 50包括功率引脚51、开关控制引脚G1至G4及电流引脚53、55，该功率引脚51与该乘法器33相连，用于获取其侦测所得的功率。该开关控制引脚G1至G4分别与四个升压子模块11、12、13、14的第一开关Q1的栅极G相连，用于输出控制信号控制第一开关Q1的导通及截止，从而切换升压模块10的工作模式。该电流引脚53与电源管理模块10的电流输出引脚A0、A1相连。在本较佳实施例中，该MCU 50具有第一临界功率及第二临界功率，其中，该第一临界功率小于该第二临界功率，该MCU 50根据该输出功率与第一及第二临界功率的大小情况，切换该升压模块10的工作模式。
本发明所述的驱动电路100工作时，该光电耦合器31侦测该升压模块10的输出电流，经该乘法器33进行乘法运算后，得到其输出功率。该MCU 50根据该输出功率的大小切换该升压模块10的工作模式，当该输出功率小于该第一临界功率时，该MCU 50将该升压模块10切换为该第一工作模式，具体地，请参阅图2，该开关控制引脚G1至G4分别输出控制信号Gate1至Gate4，其中，控制信号Gate1与Gate3具有第一延时Delay1，且为低电平，，使得该第一升压子模块11及第三升压子模块13的第一开关Q1截止，该第二升压子模块12及第四升压子模块14的第一开关Q1导通，当该输出功率大于该第一临界功率，且小于该第二临界功率时，该MCU 50将该升压模块10切换为该第二工作模式，具体地，请参阅图3，该开关控制引脚G1至G4分别输出控制信号Gate1至Gate4，其中，控制信号Gate1、Gate2具有第二延时Delay2，控制信号Gate1、Gate2与Gate3为低电平，使得该第一至第三升压子模块11、12、13的第一开关Q1均导通，该第四升压子模块14的第一开关Q1截止，当该输出功率大于该第二临界功率时，该MCU 50将该升压模块10切换为该第三工作模式，具体地，请参阅图4，该开关控制引脚G1至G4分别输出控制信号Gate1至Gate4，其中，控制信号Gate1、Gate2具有第三延时Delay2， 控制信号Gate1至Gate4均为低电平，使得该第一至第四升压子模块11、12、13、14的第一开关Q1均导通。
综上所述，本发明实施例所述的驱动电路100可根据升压模块10的输出功率的大小选择不同的工作模式，从而将功率进行分散，提升效率，可有效地解决大功率条件下，效率过低以及元器件温度过高的问题，且不会增加控制芯片的成本。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (10)

  1. 一种驱动电路，其用于液晶显示器，其中，该驱动电路包括升压模块、电源管理模块、功率侦测模块及微控制单元，该电源管理模块与该升压模块及该微控制单元相连，该升压模块、该功率侦测模块及该微控制单元依次连接，该功率侦测模块侦测该升压模块的输出功率，该微控制单元根据该输出功率切换该升压模块的工作模式。
  2. 如权利要求1所述的驱动电路，其中，该微控制单元包括第一及第二临界功率，其中，该第一临界点功率小于该第二临界点功率，该升压模块具有第一、第二及第三工作模式，当该输出功率小于该第一临界功率时，该微控制单元将该升压模块切换至该第一工作模式，当该输出功率大于该第一临界功率，且小于该第二临界功率时，该微控制单元将该升压模块切换至该第二工作模式，当该输出功率大于该第二临界功率时，该微控制单元将该升压模块切换至该第三工作模式。
  3. 如权利要求2所述的驱动电路，其中，该升压模块包括第一升压子模块、第二升压子模块、第三升压子模块及第四升压子模块，每一升压子模块均包括第一开关、第二开关、电感、二极管及第一电阻；该第一开关一端连接电源，另一端经该电感连接至该第二开关，该第二开关一端与该电感相连，另一端经该第一电阻接地，该二极管一端连接至第一开关与该电感之间，另一端形成输出端，该第一开关与该微控制单元相连，该第二开关与该电源管理模块相连。
  4. 如权利要求3所述的驱动电路，其中，该第一开关为N沟道金属氧化物半导体(metal oxide semiconductor，MOS)管，该第二开关为P沟道MOS管；该第一开关的源极连接至电源，栅极连接至该微控制单元，漏极经该电感连接至该第二开关；该第二开关的源极经该第一电阻接地，栅极连接至该电源 管理模块，漏极与该第一开关的漏极相连。
  5. 如权利要求3所述的驱动电路，其中，当该升压模块处于第一工作模式时，第一升压子模块及第三升压子模块的第一开关截止，该第二升压子模块及第四升压子模块的第一开关导通；当该升压模块处于第二工作模式时，该第一至第三升压子模块的第一开关均导通，该第四升压子模块的第一开关截止；当该升压模块处于第三工作模式时，该第一至第四升压子模块的第一开关均导通。
  6. 如权利要求3所述的驱动电路，其中，该电源管理模块包括接地引脚、驱动引脚、电流侦测引脚及电流输出引脚；该接地引脚接地，该驱动引脚分别与该升压子模块的第二开关相连，控制其导通及截止，进而控制对应的二极管的导通及截止；该电流侦测引脚分别至该升压子模块的第二开关的与第一电阻之间，侦测流经第一电阻的电流大小，该电流控制引脚与该微控制单元相连，向其提供电流。
  7. 如权利要求3所述的驱动电路，其中，该功率侦测模块包括电流侦测模块及与其相连的乘法器，该电流侦测模块侦测升压模块的输出电流，该乘法器将该输出电流与该升压模块的输出电压进行乘法运算后得到该升压模块的输出功率，并发送至该微控制单元。
  8. 如权利要求7所述的驱动电路，其中，该电流侦测模块为光电耦合器。
  9. 如权利要求8所述的驱动电路，其中，该光电耦合器包括第一端、第二端、第三端及第四端，该第一端的该升压子模块的二极管相连，该第二端与该输出端相连，该第三端经第二电阻连接至电源，该第四端经第三电阻接地，该乘法器一端与该第三端相连，获取光电耦合器所侦测的电流，另一端获取该升压模块的输出电压，经过乘法运算后得到该升压模块的输出功率。
  10. 如权利要求6所述的驱动电路，其中，该微控制单元包括功率引脚、开关控制引脚及电流引脚，该功率引脚与该功率侦测模块相连，获取其侦测所得的功率，该开关控制引脚与该升压子模块的第一开关相连，控制其导通及截止，从而切换其工作模式。
PCT/CN2015/099779 2015-12-08 2015-12-30 驱动电路 Ceased WO2017096664A1 (zh)

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
JP6468271B2 (ja) * 2016-11-25 2019-02-13 トヨタ自動車株式会社 駆動装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203086782U (zh) * 2012-12-06 2013-07-24 艾尔瓦特集成电路科技（天津）有限公司 Led发光控制器、驱动器、照明设备及显示设备
CN103280191A (zh) * 2013-05-20 2013-09-04 深圳市华星光电技术有限公司 Led背光驱动电路、液晶显示装置和一种驱动方法
US8638051B2 (en) * 2011-04-08 2014-01-28 Samsung Display Co., Ltd. DC-DC converter and driving device of light source for display device using the same
CN204268235U (zh) * 2014-11-24 2015-04-15 东莞帝光电子科技实业有限公司 具有独立光源驱动电路的led背光源
CN104682699A (zh) * 2015-03-20 2015-06-03 深圳市华星光电技术有限公司 一种升降压变换电路、电源管理模块及液晶驱动装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5479333A (en) * 1994-04-25 1995-12-26 Chrysler Corporation Power supply start up booster circuit
JP3569922B2 (ja) * 1997-03-28 2004-09-29 セイコーエプソン株式会社 電源回路、表示装置及び電子機器
TW200416438A (en) * 2003-02-13 2004-09-01 Rohm Co Ltd Power source device for driving a display device, and the display device
JP4826383B2 (ja) * 2006-08-10 2011-11-30 セイコーエプソン株式会社 電源回路、表示ドライバ、電気光学装置及び電子機器
US7733160B2 (en) * 2007-01-29 2010-06-08 Seiko Epson Corporation Power supply circuit, display driver, electro-optical device, and electronic instrument
CN202008814U (zh) * 2011-04-20 2011-10-12 青岛海信电器股份有限公司 驱动电路以及液晶电视机
TWI434275B (zh) * 2011-09-13 2014-04-11 Au Optronics Corp 顯示器及直流/直流轉換器控制方法
US9058776B2 (en) * 2013-08-06 2015-06-16 Shenzhen China Star Optoelectronics Technology Co., Ltd. LED backlight source and liquid crystal device
CN104008735B (zh) * 2014-06-18 2016-06-08 深圳市华星光电技术有限公司 Led背光驱动电路以及液晶显示器
CN105093598B (zh) * 2015-08-07 2018-03-13 深圳市华星光电技术有限公司 阵列基板行驱动短路保护电路及液晶面板

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8638051B2 (en) * 2011-04-08 2014-01-28 Samsung Display Co., Ltd. DC-DC converter and driving device of light source for display device using the same
CN203086782U (zh) * 2012-12-06 2013-07-24 艾尔瓦特集成电路科技（天津）有限公司 Led发光控制器、驱动器、照明设备及显示设备
CN103280191A (zh) * 2013-05-20 2013-09-04 深圳市华星光电技术有限公司 Led背光驱动电路、液晶显示装置和一种驱动方法
CN204268235U (zh) * 2014-11-24 2015-04-15 东莞帝光电子科技实业有限公司 具有独立光源驱动电路的led背光源
CN104682699A (zh) * 2015-03-20 2015-06-03 深圳市华星光电技术有限公司 一种升降压变换电路、电源管理模块及液晶驱动装置

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