WO2020077783A1 - 一种驱动电路及显示装置 - Google Patents

一种驱动电路及显示装置 Download PDF

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Publication number
WO2020077783A1
WO2020077783A1 PCT/CN2018/120978 CN2018120978W WO2020077783A1 WO 2020077783 A1 WO2020077783 A1 WO 2020077783A1 CN 2018120978 W CN2018120978 W CN 2018120978W WO 2020077783 A1 WO2020077783 A1 WO 2020077783A1
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Prior art keywords
signal
timing control
voltage
detection
control module
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PCT/CN2018/120978
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English (en)
French (fr)
Inventor
李文芳
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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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
    • 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

Definitions

  • the invention relates to the field of display technology, in particular to a driving circuit and a display device.
  • TCON timing control module
  • the voltage required by TCON is 1.1V. If the PMIC output voltage is 1.1V, the voltage at the input of TCON may be only 0.8V.
  • the existing method is to compensate for the loss by increasing the voltage at the output of the PMIC. For example, the voltage at the output of the PMIC is increased to 1.4V. Even during normal operation, the voltage at the input of the TCON reaches 1.1V, but due to the moment of startup , The voltage at the TCON input terminal may exceed 1.4V, which can easily damage the TCON.
  • the object of the present invention is to provide a driving circuit and a display device, which can reduce the risk of damage to the timing control module.
  • the present invention provides a driving circuit, which includes:
  • Power management module used to provide power supply voltage
  • the timing control module is electrically connected to the power management module through a connecting line, and the timing control module is used to receive the power supply voltage through the connecting line to obtain a receiving voltage;
  • a detection module which is electrically connected to the power management module and the timing control module respectively, is used to detect whether the loss voltage on the connection line is greater than a preset threshold, obtain a detection result, and generate a control signal according to the detection result ;
  • the timing control module is further configured to adjust the power supply voltage provided by the power management module according to the control signal, so that the timing control module receives the voltage Equal to the preset voltage.
  • the detection module when the detection module detects that the loss voltage on the connection line is less than or equal to the preset threshold, the level of the control signal is high;
  • the detection module detects that the loss voltage on the connection line is greater than the preset threshold, the level of the control signal is low.
  • the timing control module when the level of the control signal is low, the timing control module is specifically configured to generate an adjustment signal according to the control signal, and provide the power management module with the adjustment signal according to the adjustment signal Adjust the power supply voltage.
  • the timing control module when the level of the control signal is low, the timing control module is specifically configured to increase the power supply voltage provided by the power management module according to the adjustment signal.
  • the detection module includes a detection unit and a signal generation unit, the detection unit is electrically connected to the power management module and the timing control module respectively, and the detection unit is used to detect the Whether the loss voltage on the connection line is greater than the preset threshold to obtain the detection result;
  • the signal generation unit is respectively connected to the detection unit and the timing control module, and the signal generation unit is used to generate a control signal according to the detection result.
  • the power management module includes a first output terminal and a feedback input terminal
  • the timing control module includes a first input terminal, a detection signal input terminal and a feedback output terminal
  • the first output terminal is The first input terminal is connected, and the feedback output terminal is connected to the feedback input terminal;
  • the detection unit includes an optical coupler having an anode, a cathode, an emitter, and a collector; the anode is connected to the first output terminal, and the cathode is connected to the first input terminal.
  • the emitter is connected to the signal generating unit, and the collector is connected to a constant voltage high-level signal.
  • the signal generating unit includes a MOS tube and a first resistor
  • the gate of the MOS tube is connected to the emitter, the source of the MOS tube is grounded, and the drain of the MOS tube is connected to the detection signal input terminal and the first resistor end; The other end of the first resistor is connected to a constant voltage high-level signal.
  • the signal generating unit further includes a second resistor, one end of the second resistor is respectively connected to the emitter and the gate of the MOS tube, and the other end of the second resistor Ground.
  • the MOS tube is an N-channel MOS tube.
  • the present invention provides a display device including a driving circuit, which includes:
  • Power management module used to provide power supply voltage
  • the timing control module is electrically connected to the power management module through a connecting line, and the timing control module is used to receive the power supply voltage through the connecting line to obtain a receiving voltage;
  • a detection module which is electrically connected to the power management module and the timing control module respectively, is used to detect whether the loss voltage on the connection line is greater than a preset threshold, obtain a detection result, and generate a control signal according to the detection result ;
  • the timing control module is further configured to adjust the power supply voltage provided by the power management module according to the control signal, so that the timing control module receives the voltage Equal to the preset voltage.
  • the level of the control signal is a high level
  • the detection module detects that the loss voltage on the connection line is greater than the preset threshold, the level of the control signal is low.
  • the timing control module when the level of the control signal is low, the timing control module is specifically configured to generate an adjustment signal according to the control signal, and provide the power management module with the adjustment signal according to the adjustment signal Adjust the power supply voltage.
  • the timing control module when the level of the control signal is low, is specifically configured to increase the power supply voltage provided by the power management module according to the adjustment signal.
  • the detection module includes a detection unit and a signal generation unit, the detection unit is electrically connected to the power management module and the timing control module, respectively, and the detection unit is used to detect the Whether the loss voltage on the connection line is greater than the preset threshold to obtain the detection result;
  • the signal generation unit is respectively connected to the detection unit and the timing control module, and the signal generation unit is used to generate a control signal according to the detection result.
  • the power management module includes a first output terminal and a feedback input terminal
  • the timing control module includes a first input terminal, a detection signal input terminal and a feedback output terminal
  • the first output terminal is The first input terminal is connected, and the feedback output terminal is connected to the feedback input terminal;
  • the detection unit includes an optical coupler having an anode, a cathode, an emitter, and a collector; the anode is connected to the first output terminal, and the cathode is connected to the first input terminal.
  • the emitter is connected to the signal generating unit, and the collector is connected to a constant voltage high-level signal.
  • the signal generating unit includes a MOS tube and a first resistor
  • the gate of the MOS tube is connected to the emitter, the source of the MOS tube is grounded, and the drain of the MOS tube is connected to the detection signal input terminal and the first resistor end; The other end of the first resistor is connected to a constant voltage high-level signal.
  • the signal generating unit further includes a second resistor, one end of the second resistor is respectively connected to the emitter and the gate of the MOS tube, and the other end of the second resistor Ground.
  • the MOS tube is an N-channel MOS tube.
  • the driving circuit and the display device of the present invention detect whether the loss voltage on the connection line is greater than a preset threshold through a detection module, obtain a detection result, and generate a control signal according to the detection result, and the timing control module controls the control signal according to the control signal.
  • the power supply voltage provided by the power management module is adjusted so that the received voltage of the timing control module is equal to the preset voltage. Since the power supply voltage of the power management module is adjusted according to the loss voltage on the connection line, the risk of damage to the timing control module is reduced.
  • FIG. 1 is a schematic structural diagram of a driving circuit of the present invention.
  • FIG. 1 is a schematic structural diagram of a driving circuit of the present invention.
  • the driving circuit of the present invention includes a power management module 10, a detection module 20, and a timing control module 30;
  • the power management module 10 provides a power supply voltage to the timing control module 30; the power management module 10 includes a first output terminal 11 and a feedback input terminal 15.
  • the power management module 10 further includes a first power input terminal; a constant voltage high level signal VDD is input to the first power input terminal.
  • the timing control module 30 is electrically connected to the power management module 30 through a connection line 111, and the equivalent resistance of the connection line is R1.
  • the timing control module 30 includes a second power input terminal; a constant voltage high-level signal VDD is input to the second power input terminal.
  • the detection module 20 is electrically connected to the power management module 10 and the timing control module 20 respectively.
  • the detection module 20 is used to detect whether the loss voltage on the connection line 111 is greater than a preset threshold to obtain a detection result, and according to the The detection result generates a control signal, and then the control signal is input to the timing control module 30.
  • the timing control module 30 receives the power supply voltage through the connection line 111 to obtain a received voltage; that is, the received voltage is less than or equal to the power supply voltage.
  • the timing control module 30 adjusts the power supply voltage provided by the power management module 10 according to the acquired control signal, so that the timing control module 30 The received voltage is equal to the preset voltage, which is the normal working voltage of the timing control module, for example, 1.1V.
  • the timing control module 30 includes a first input terminal 12, a detection signal input terminal 13 and a feedback output terminal 14; the first output terminal 11 is connected to the first input terminal 12, and the feedback output terminal 14 is connected to the The feedback input 15 is connected.
  • the detection module 20 When the detection module 20 detects that the loss voltage on the connection line 111 is less than or equal to the preset threshold, the level of the control signal S1 is high; when the detection module 20 detects the connection The loss voltage on the line 111 is greater than the preset threshold, and the level of the control signal S1 is a low level.
  • the timing control module 30 when the level of the control signal S1 is low, the timing control module 30 generates adjustment signals SCL and SDA according to the control signal S1, and controls the power management module according to the adjustment signal 10 Adjust the supply voltage provided.
  • the adjustment signal includes a clock adjustment signal SCL and a digital adjustment signal SDA.
  • the number of feedback output terminals 14 may be two, and the number of feedback input terminals 15 may also be two.
  • One of the feedback output terminals 14 is used to output the clock adjustment signal SCL, and the other feedback output terminal 14 is used to output the digital adjustment signal SDA.
  • One feedback input terminal 15 is used to receive the clock adjustment signal SCL, and the other feedback input terminal 15 is used to receive the digital adjustment signal SDA.
  • the timing control module 30 increases the power supply voltage provided by the power management module according to the adjustment signal.
  • the detection module 20 includes a detection unit 21 and a signal generation unit 22.
  • the detection unit 21 is electrically connected to the power management module 11 and the timing control module 30 respectively, and the detection unit 22 is used to detect whether the loss voltage on the connection line 111 is greater than a preset threshold to obtain a detection result ;
  • the signal generating unit 22 is respectively connected to the detecting unit 21 and the timing control module 30, and the signal generating unit 22 is used to generate a control signal S1 according to the detection result, and then input the control signal S1 to Timing control module 30.
  • the detection unit 21 includes an optical coupler having an anode, a cathode, an emitter, and a collector; the anode is connected to the first output terminal 11, and the cathode is connected to the first input terminal 12 Connected, the emitter is connected to the signal generating unit 22, and the collector is connected to a constant voltage high-level signal VDD, for example, VDD is 3.3V.
  • the signal generating unit 22 includes a MOS tube Q1 and a first resistor R3; the gate of the MOS tube Q1 is connected to the emitter, the source of the MOS tube Q1 is grounded, and the drain of the MOS tube Q1 is respectively It is connected to the detection signal input terminal 13 and one end of the first resistor R3; the other end of the first resistor R3 is connected to a constant voltage high-level signal VDD.
  • the MOS tube is an N-channel MOS tube.
  • the signal generating unit 22 further includes a second resistor R2, one end of the second resistor R2 is respectively connected to the emitter and the gate of the MOS tube, and the other end of the second resistor R2 is grounded.
  • the photocoupler is a device that uses light as a medium to transmit electrical signals.
  • the light emitter infrared light emitting diode LED
  • the light receiver photosensitive semiconductor tube
  • the input terminal When the input terminal is energized, the light emitter emits light, and the light receiver generates light current after receiving the light, which flows out from the output end, thereby realizing the "electricity-light-electricity" conversion.
  • the voltage of the equivalent resistance R1 of the connection line 111 is small, so the voltage loss is small, the diode in the photocoupler does not conduct, the photocoupler does not work, the MOS transistor Q1 does not conduct, timing control
  • the detection signal input terminal 13 of the module 30 receives the high-level control signal S1.
  • the voltage of the equivalent resistance R1 of the connection line 111 is large, so the voltage loss is large.
  • the diode in the photocoupler is turned on, and the luminous intensity of the diode becomes larger, thereby making The triode is turned on and flows through the emitter.
  • the current of the collector becomes stronger as the luminous intensity increases. Therefore, the current flowing through R2 becomes larger and the voltage at point A becomes higher.
  • the detection signal input terminal 13 of the timing control module 30 receives the low-level control signal S1
  • the timing control module 30 generates an adjustment signal according to the control signal SCL and SDA to increase the power supply voltage output by the power management module to avoid the insufficient voltage actually received by the timing control module 30.
  • the present invention also provides a display device including the above-mentioned driving circuit.
  • the driving circuit and the display device of the present invention detect whether the loss voltage on the connection line is greater than a preset threshold through a detection module, obtain a detection result, and generate a control signal according to the detection result, and the timing control module controls the control signal according to the control signal.
  • the power supply voltage provided by the power management module is adjusted so that the received voltage of the timing control module is equal to the preset voltage. Since the power supply voltage of the power management module is adjusted according to the loss voltage on the connection line, the risk of damage to the timing control module is reduced.

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  • Physics & Mathematics (AREA)
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Abstract

一种驱动电路及显示装置，其中，驱动电路包括：检测模块（20），用于检测时序控制模块（30）和电源管理模块（10）之间的连接线（111）上的损耗电压是否大于预设阈值，得到检测结果，并根据检测结果生成控制信号（S1）；当检测到损耗电压大于预设阈值时，时序控制模块（30）还用于根据控制信号（S1）对电源管理模块（10）提供的电源电压进行调整。

Description

一种驱动电路及显示装置 技术领域
本发明涉及显示技术领域，特别是涉及一种驱动电路及显示装置。
 背景技术
随着显示面板的发展，部分驱动电路集成到显示面板上，比如时序控制模块（TCON），由于TCON需要面板外部的电源管理模块提供电源，而由于PMIC输出端与TCON输入端之间的走线较长，从而导致电阻较大，进而导致电压损耗较大，使得TCON实际接收到的电压小于实际需要的电压，从而使得TCON无法正常工作。
例如，TCON需要的电压为1.1V，如果PMIC输出电压为1.1V，那么TCON输入端的电压可能只有0.8V。
 技术问题
现有的方式是通过增大PMIC输出端的电压的方式，来弥补损耗，比如PMIC输出端的电压提高至1.4V，即便在正常工作时，TCON的输入端的电压达到1.1V，但由于在开机的瞬间，TCON输入端的电压可能会超过1.4V，从而容易损坏TCON。
 技术解决方案
本发明的目的在于提供一种驱动电路及显示装置，能够降低时序控制模块损坏的风险。
为解决上述技术问题，本发明提供一种驱动电路，其包括：
电源管理模块，用于提供电源电压；
时序控制模块，通过连接线与所述电源管理模块电性连接，所述时序控制模块用于通过所述连接线接收所述电源电压，得到接收电压；
检测模块，分别与所述电源管理模块和所述时序控制模块电性连接，用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号；
其中当检测到所述损耗电压大于预设阈值时，所述时序控制模块还用于根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压。
在本发明的驱动电路中，当所述检测模块检测到所述连接线上的损耗电压小于或等于所述预设阈值，所述控制信号的电平为高电平；
当所述检测模块检测到所述连接线上的损耗电压大于所述预设阈值，所述控制信号的电平为低电平。
在本发明的驱动电路中，当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述控制信号生成调节信号，根据所述调节信号对所述电源管理模块提供的电源电压进行调节。
在本发明的驱动电路中，当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述调节信号增大所述电源管理模块提供的电源电压。
在本发明的驱动电路中，所述检测模块包括检测单元和信号产生单元，所述检测单元分别与所述电源管理模块和所述时序控制模块电性连接，所述检测单元用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果；
所述信号产生单元分别与所述检测单元和所述时序控制模块连接，所述信号产生单元用于根据所述检测结果生成控制信号。
在本发明的驱动电路中，所述电源管理模块包括第一输出端和反馈输入端，所述时序控制模块包括第一输入端、检测信号输入端和反馈输出端；所述第一输出端与所述第一输入端连接，所述反馈输出端与所述反馈输入端连接；
所述检测单元包括光耦合器，所述光耦合器具有阳极、阴极、发射极和集电极；所述阳极与所述第一输出端连接，所述阴极与所述第一输入端连接，所述发射极与所述信号产生单元连接，所述集电极接入恒压高电平信号。
在本发明的驱动电路中，所述信号产生单元包括MOS管以及第一电阻；
所述MOS管的栅极与所述发射极连接，所述MOS管的源极接地，所述MOS管的漏极分别与所述检测信号输入端和所述第一电阻的一端连接；所述第一电阻的另一端接入恒压高电平信号。
在本发明的驱动电路中，所述信号产生单元还包括第二电阻，所述第二电阻的一端分别与所述发射极和所述MOS管的栅极连接，所述第二电阻的另一端接地。
在本发明的驱动电路中，所述MOS管为N沟道MOS管。
本发明提供一种显示装置，其包括驱动电路，其包括：
电源管理模块，用于提供电源电压；
时序控制模块，通过连接线与所述电源管理模块电性连接，所述时序控制模块用于通过所述连接线接收所述电源电压，得到接收电压；
检测模块，分别与所述电源管理模块和所述时序控制模块电性连接，用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号；
其中当检测到所述损耗电压大于预设阈值时，所述时序控制模块还用于根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压。
在本发明的显示装置中，当所述检测模块检测到所述连接线上的损耗电压小于或等于所述预设阈值，所述控制信号的电平为高电平；
当所述检测模块检测到所述连接线上的损耗电压大于所述预设阈值，所述控制信号的电平为低电平。
在本发明的显示装置中，当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述控制信号生成调节信号，根据所述调节信号对所述电源管理模块提供的电源电压进行调节。
在本发明的显示装置中，当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述调节信号增大所述电源管理模块提供的电源电压。
在本发明的显示装置中，所述检测模块包括检测单元和信号产生单元，所述检测单元分别与所述电源管理模块和所述时序控制模块电性连接，所述检测单元用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果；
所述信号产生单元分别与所述检测单元和所述时序控制模块连接，所述信号产生单元用于根据所述检测结果生成控制信号。
在本发明的显示装置中，所述电源管理模块包括第一输出端和反馈输入端，所述时序控制模块包括第一输入端、检测信号输入端和反馈输出端；所述第一输出端与所述第一输入端连接，所述反馈输出端与所述反馈输入端连接；
所述检测单元包括光耦合器，所述光耦合器具有阳极、阴极、发射极和集电极；所述阳极与所述第一输出端连接，所述阴极与所述第一输入端连接，所述发射极与所述信号产生单元连接，所述集电极接入恒压高电平信号。
在本发明的显示装置中，所述信号产生单元包括MOS管以及第一电阻；
所述MOS管的栅极与所述发射极连接，所述MOS管的源极接地，所述MOS管的漏极分别与所述检测信号输入端和所述第一电阻的一端连接；所述第一电阻的另一端接入恒压高电平信号。
在本发明的显示装置中，所述信号产生单元还包括第二电阻，所述第二电阻的一端分别与所述发射极和所述MOS管的栅极连接，所述第二电阻的另一端接地。
在本发明的显示装置中，所述MOS管为N沟道MOS管。
 有益效果
本发明的驱动电路及显示装置，通过检测模块检测连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号，时序控制模块根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压，由于根据连接线上的损耗电压调整电源管理模块的电源电压，因此降低时序控制模块损坏的风险。
 附图说明
图1为本发明的驱动电路的结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，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，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
请参照图1，图1为本发明的驱动电路的结构示意图。
如图1所示，本发明的驱动电路包括电源管理模块10、检测模块20以及时序控制模块30；
电源管理模块10向时序控制模块30提供电源电压；所述电源管理模块10包括第一输出端11和反馈输入端15。电源管理模块10还包括第一电源输入端；该第一电源输入端输入有恒压高电平信号VDD。
时序控制模块30通过连接线111与所述电源管理模块30电性连接，所述连接线的等效电阻为R1。时序控制模块30包括第二电源输入端；该第二电源输入端输入有恒压高电平信号VDD。
检测模块20分别与所述电源管理模块10和所述时序控制模块20电性连接，检测模块20用来检测所述连接线111上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号，之后将所述控制信号输入所述时序控制模块30。
所述时序控制模块30通过所述连接线111接收所述电源电压，得到接收电压；也即接收电压小于等于电源电压。
其中当检测到所述损耗电压大于预设阈值时，所述时序控制模块30根据所述获取到的控制信号对所述电源管理模块10提供的电源电压进行调整，以使所述时序控制模块30的接收电压等于预设电压，预设电压为时序控制模块正常工作的电压，比如为1.1V。
所述时序控制模块30包括第一输入端12、检测信号输入端13和反馈输出端14；所述第一输出端11与所述第一输入端12连接，所述反馈输出端14与所述反馈输入端15连接。
当所述检测模块20检测到所述连接线111上的损耗电压小于或等于所述预设阈值，所述控制信号S1的电平为高电平；当所述检测模20块检测所述连接线111上的损耗电压大于所述预设阈值，所述控制信号S1的电平为低电平。
在一实施方式中，当所述控制信号S1的电平为低电平时，所述时序控制模块30根据所述控制信号S1生成调节信号SCL和SDA，根据所述调节信号对所述电源管理模块10提供的电源电压进行调节。在一实施方式中，调节信号包括时钟调节信号SCL和数字调节信号SDA。
反馈输出端14的数量可以为两个，反馈输入端15的数量也可为两个。其中一个反馈输出端14用于输出时钟调节信号SCL，另外一个反馈输出端14用于输出数字调节信号SDA。其中一个反馈输入端15用于接收时钟调节信号SCL，另外一个反馈输入端15用于接收数字调节信号SDA。
在一实施方式中，当所述控制信号S1的电平为低电平时，所述时序控制模块30根据所述调节信号增大所述电源管理模块提供的电源电压。
所述检测模块20包括检测单元21和信号产生单元22。
所述检测单元21分别与所述电源管理模块11和所述时序控制模块30电性连接，所述检测单元22用于检测所述连接线111上的损耗电压是否大于预设阈值，得到检测结果；
所述信号产生单元22分别与所述检测单元21和所述时序控制模块30连接，所述信号产生单元22用于根据所述检测结果生成控制信号S1，之后将所述控制信号S1输入所述时序控制模块30。
所述检测单元21包括光耦合器，所述光耦合器具有阳极、阴极、发射极和集电极；所述阳极与所述第一输出端11连接，所述阴极与所述第一输入端12连接，所述发射极与所述信号产生单元22连接，所述集电极接入恒压高电平信号VDD，VDD比如为3.3V。
所述信号产生单元22包括MOS管Q1以及第一电阻R3；所述MOS管Q1的栅极与所述发射极连接，所述MOS管Q1的源极接地，所述MOS管Q1的漏极分别与所述检测信号输入端13、所述第一电阻R3的一端连接；所述第一电阻R3的另一端接入恒压高电平信号VDD。其中，所述MOS管为N沟道MOS管。
所述信号产生单元22还包括第二电阻R2，所述第二电阻R2的一端分别与所述发射极和所述MOS管的栅极连接，所述第二电阻R2的另一端接地。
光电耦合器是以光为媒介来传输电信号的器件，通常将发光器（红外线发光二极管LED）与受光器（光敏半导体管）封装在同一管壳内。当输入端加电信号时发光器发出光线，受光器接收光线之后就产生光电流，从输出端流出，从而实现了“电—光—电”的转换。
在轻载状态下，连接线111的等效电阻R1的电压较小，因此电压损耗较小，光电耦合器中的二极管不导通，光电耦合器不工作，MOS管Q1不导通，时序控制模块30的检测信号输入端13接收高电平的控制信号S1。
当进入重载状态时，连接线111的等效电阻R1的电压较大，因此电压损耗较大，此时光电耦合器中的二极管导通，二极管的发光强度变大，从而使得光电耦合器的三极管导通，流过发射极，集电极的电流随着发光强度的增强而变强，因此使得流过R2上的电流变大，A点的电压变高。当A点的电压高于Q1的导通电压时，Q1导通，时序控制模块30的检测信号输入端13接收低电平的控制信号S1，此时时序控制模块30根据该控制信号生成调节信号SCL、SDA，以将电源管理模块输出的电源电压调高，避免时序控制模块30实际接收到的电压不足。
本发明还提供一种显示装置，其包括上述驱动电路。
本发明的驱动电路及显示装置，通过检测模块检测连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号，时序控制模块根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压，由于根据连接线上的损耗电压调整电源管理模块的电源电压，因此降低时序控制模块损坏的风险。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种驱动电路，其包括：
    电源管理模块，用于提供电源电压；
    时序控制模块，通过连接线与所述电源管理模块电性连接，所述时序控制模块用于通过所述连接线接收所述电源电压，得到接收电压；
    检测模块，分别与所述电源管理模块和所述时序控制模块电性连接，用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号；
    其中当检测到所述损耗电压大于预设阈值时，所述时序控制模块还用于根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压。
  2. 根据权利要求1所述的驱动电路，其特征在于，
    当所述检测模块检测到所述连接线上的损耗电压小于或等于所述预设阈值，所述控制信号的电平为高电平；
    当所述检测模块检测到所述连接线上的损耗电压大于所述预设阈值，所述控制信号的电平为低电平。
  3. 根据权利要求2所述的驱动电路，其特征在于，
    当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述控制信号生成调节信号，根据所述调节信号对所述电源管理模块提供的电源电压进行调节。
  4. 根据权利要求3所述的驱动电路，其中
    当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述调节信号增大所述电源管理模块提供的电源电压。
  5. 根据权利要求1所述的驱动电路，其中
    所述检测模块包括检测单元和信号产生单元，所述检测单元分别与所述电源管理模块和所述时序控制模块电性连接，所述检测单元用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果；
    所述信号产生单元分别与所述检测单元和所述时序控制模块连接，所述信号产生单元用于根据所述检测结果生成控制信号。
  6. 根据权利要求5所述的驱动电路，其中
    所述电源管理模块包括第一输出端和反馈输入端，所述时序控制模块包括第一输入端、检测信号输入端和反馈输出端；所述第一输出端与所述第一输入端连接，所述反馈输出端与所述反馈输入端连接；
    所述检测单元包括光耦合器，所述光耦合器具有阳极、阴极、发射极和集电极；所述阳极与所述第一输出端连接，所述阴极与所述第一输入端连接，所述发射极与所述信号产生单元连接，所述集电极接入恒压高电平信号。
  7. 根据权利要求6所述的驱动电路，其中
    所述信号产生单元包括MOS管以及第一电阻；
    所述MOS管的栅极与所述发射极连接，所述MOS管的源极接地，所述MOS管的漏极分别与所述检测信号输入端和所述第一电阻的一端连接；所述第一电阻的另一端接入恒压高电平信号。
  8. 根据权利要求7所述的驱动电路，其中
    所述信号产生单元还包括第二电阻，所述第二电阻的一端分别与所述发射极和所述MOS管的栅极连接，所述第二电阻的另一端接地。
  9. 根据权利要求7所述的驱动电路，其中
    所述MOS管为N沟道MOS管。
  10. 一种显示装置，其包括驱动电路，其包括：
    电源管理模块，用于提供电源电压；
    时序控制模块，通过连接线与所述电源管理模块电性连接，所述时序控制模块用于通过所述连接线接收所述电源电压，得到接收电压；
    检测模块，分别与所述电源管理模块和所述时序控制模块电性连接，用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果，并根据所述检测结果生成控制信号；
    其中当检测到所述损耗电压大于预设阈值时，所述时序控制模块还用于根据所述控制信号对所述电源管理模块提供的电源电压进行调整，以使所述时序控制模块的接收电压等于预设电压。
  11. 根据权利要求10所述的显示装置，其中
    当所述检测模块检测到所述连接线上的损耗电压小于或等于所述预设阈值，所述控制信号的电平为高电平；
    当所述检测模块检测到所述连接线上的损耗电压大于所述预设阈值，所述控制信号的电平为低电平。
  12. 根据权利要求11所述的显示装置，其中
    当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述控制信号生成调节信号，根据所述调节信号对所述电源管理模块提供的电源电压进行调节。
  13. 根据权利要求12所述的驱动电路，其中
    当所述控制信号的电平为低电平时，所述时序控制模块具体用于根据所述调节信号增大所述电源管理模块提供的电源电压。
  14. 根据权利要求10所述的显示装置，其中
    所述检测模块包括检测单元和信号产生单元，所述检测单元分别与所述电源管理模块和所述时序控制模块电性连接，所述检测单元用于检测所述连接线上的损耗电压是否大于预设阈值，得到检测结果；
    所述信号产生单元分别与所述检测单元和所述时序控制模块连接，所述信号产生单元用于根据所述检测结果生成控制信号。
  15. 根据权利要求14所述的显示装置，其中
    所述电源管理模块包括第一输出端和反馈输入端，所述时序控制模块包括第一输入端、检测信号输入端和反馈输出端；所述第一输出端与所述第一输入端连接，所述反馈输出端与所述反馈输入端连接；
    所述检测单元包括光耦合器，所述光耦合器具有阳极、阴极、发射极和集电极；所述阳极与所述第一输出端连接，所述阴极与所述第一输入端连接，所述发射极与所述信号产生单元连接，所述集电极接入恒压高电平信号。
  16. 根据权利要求15所述的显示装置，其中
    所述信号产生单元包括MOS管以及第一电阻；
    所述MOS管的栅极与所述发射极连接，所述MOS管的源极接地，所述MOS管的漏极分别与所述检测信号输入端和所述第一电阻的一端连接；所述第一电阻的另一端接入恒压高电平信号。
  17. 根据权利要求16所述的显示装置，其中
    所述信号产生单元还包括第二电阻，所述第二电阻的一端分别与所述发射极和所述MOS管的栅极连接，所述第二电阻的另一端接地。
  18. 根据权利要求16所述的显示装置，其中
    所述MOS管为N沟道MOS管。
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