WO2020082468A1 - 显示面板的电源电压控制电路、显示面板及显示装置 - Google Patents

显示面板的电源电压控制电路、显示面板及显示装置 Download PDF

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Publication number
WO2020082468A1
WO2020082468A1 PCT/CN2018/115955 CN2018115955W WO2020082468A1 WO 2020082468 A1 WO2020082468 A1 WO 2020082468A1 CN 2018115955 W CN2018115955 W CN 2018115955W WO 2020082468 A1 WO2020082468 A1 WO 2020082468A1
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WO
WIPO (PCT)
Prior art keywords
unit
power supply
display panel
terminal
supply voltage
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/CN2018/115955
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English (en)
French (fr)
Inventor
李汶欣
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.)
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
Original Assignee
HKC Co Ltd
Chongqing HKC Optoelectronics Technology Co Ltd
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 HKC Co Ltd, Chongqing HKC Optoelectronics Technology Co Ltd filed Critical HKC Co Ltd
Priority to US16/313,025 priority Critical patent/US10614737B1/en
Publication of WO2020082468A1 publication Critical patent/WO2020082468A1/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/18—Timing circuits for raster scan displays
    • 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
    • G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • 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
    • G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
    • 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
    • G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
    • 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
    • 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
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45702—Indexing scheme relating to differential amplifiers the LC comprising two resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit

Definitions

  • the present application belongs to the technical field of electronics, and particularly relates to a power supply voltage control circuit of a display panel, a display panel, and a display device.
  • the traditional power supply voltage enhancement circuit cannot adaptively adjust the enhancement capability of the power supply voltage (Vcom voltage) and cannot meet the rated input power requirements of the display panel.
  • the utility value is not high and the Vcom voltage with a normal amplitude cannot be provided to the display panel.
  • An object of the present application is to provide a power supply voltage control circuit for a display panel, a display panel and a display device, including but not limited to solving: the compatibility of the power supply voltage enhancement circuit in the display panel is low, and the flexibility of the circuit structure is not strong enough to The problem of making the Vcom voltage meet the requirements of the rated input power of the display panel.
  • a power supply voltage control circuit of a display panel including:
  • a first conductive unit a first conduction end of the first conductive unit is connected to a power supply, a control end of the first conductive unit is connected to the clock unit, and the first conductive unit is turned on according to the clock signal or Turn off, and generate a power driving signal when the first conductive unit is turned on;
  • a second conductive unit the control terminal of the second conductive unit is connected to the clock unit, the first conductive terminal of the second conductive unit is connected to the power supply voltage output terminal of the display panel, and the second of the second conductive unit
  • the conduction terminal is the first voltage output terminal of the power supply voltage control circuit, and the second conductive unit is turned on or off according to the clock signal;
  • the operational amplification unit the first input terminal of the operation amplification unit is connected to the power supply voltage output terminal of the display panel, the second input terminal of the operation amplification unit is connected to the reference voltage signal, and the power supply terminal of the operation amplification unit is connected At the second conducting end of the first conductive unit, the operational amplification unit amplifies and outputs the power supply voltage of the display panel according to the power supply driving signal.
  • Another object of this application is to provide a display panel, including:
  • At least one data line At least one data line
  • a gate driver the gate driver is connected to the scan line, and the gate driver generates a scan signal
  • a source driver the source driver is connected to the data line, and the source driver generates a data signal
  • a power supply voltage control circuit of a display panel is connected to the scan line and the data line, wherein the power supply voltage control circuit includes:
  • a first conductive unit a first conduction end of the first conductive unit is connected to a power supply, a control end of the first conductive unit is connected to the clock unit, and the first conductive unit is turned on according to the clock signal or Turn off, and generate a power driving signal when the first conductive unit is turned on;
  • a second conductive unit the control terminal of the second conductive unit is connected to the clock unit, the first conductive terminal of the second conductive unit is connected to the power supply voltage output terminal of the display panel, and the second of the second conductive unit
  • the conduction terminal is the first voltage output terminal of the power supply voltage control circuit, and the second conductive unit is turned on or off according to the clock signal;
  • the operational amplification unit the first input terminal of the operation amplification unit is connected to the power supply voltage output terminal of the display panel, the second input terminal of the operation amplification unit is connected to the reference voltage signal, and the power supply terminal of the operation amplification unit is connected At the second conducting end of the first conductive unit, the operational amplification unit amplifies and outputs the power supply voltage of the display panel according to the power supply driving signal.
  • Still another object of the present application is to provide a display device including a display panel
  • the display panel includes:
  • At least one data line At least one data line
  • a gate driver the gate driver is connected to the scan line, and the gate driver generates a scan signal
  • a source driver the source driver is connected to the data line, and the source driver generates a data signal
  • a power supply voltage control circuit of a display panel is connected to the scan line and the data line, wherein the power supply voltage control circuit includes:
  • a first conductive unit a first conduction end of the first conductive unit is connected to a power supply, a control end of the first conductive unit is connected to the clock unit, and the first conductive unit is turned on according to the clock signal or Turn off, and generate a power driving signal when the first conductive unit is turned on;
  • a second conductive unit the control terminal of the second conductive unit is connected to the clock unit, the first conductive terminal of the second conductive unit is connected to the power supply voltage output terminal of the display panel, and the second of the second conductive unit
  • the conduction terminal is the first voltage output terminal of the power supply voltage control circuit, and the second conductive unit is turned on or off according to the clock signal;
  • the operational amplification unit the first input terminal of the operation amplification unit is connected to the power supply voltage output terminal of the display panel, the second input terminal of the operation amplification unit is connected to the reference voltage signal, and the power supply terminal of the operation amplification unit is connected At the second conducting end of the first conductive unit, the operational amplification unit amplifies and outputs the power supply voltage of the display panel according to the power supply driving signal.
  • the embodiment of the present application compensates and amplifies and outputs the power supply voltage of the display panel through the operation amplifying unit, which can keep the Vcom voltage in the display panel always in a stable amplitude range, and prevent the Vcom voltage in the display panel from scanning lines and data lines Pulled when turned off; the Vcom voltage compensated by this application can make the display panel work in a normal state, and the display panel can present a complete and clear video / image, bringing a good visual experience to the user; effectively solving the exemplary The power supply voltage enhancement circuit in the technology cannot make the enhanced Vcom voltage meet the requirements of the rated input power of the display panel.
  • FIG. 1 is a block diagram of a power supply voltage control circuit of a display panel provided by an embodiment of the present application
  • FIG. 2 is a module structure diagram of another power supply voltage control circuit of a display panel provided by an embodiment of the present application
  • FIG. 3 is a circuit structure diagram of a reference voltage generating unit provided by an embodiment of the present application.
  • FIG. 4 is a circuit structure diagram of another reference voltage generating unit provided by an embodiment of the present application.
  • FIG. 5 is a circuit structure diagram of a first conductive unit provided by an embodiment of the present application.
  • FIG. 6 is a circuit structure diagram of a second conductive unit provided by an embodiment of the present application.
  • FIG. 7 is a circuit structural diagram of an operational amplifier unit provided by an embodiment of the present application.
  • FIG. 8 is a circuit structural diagram of another operational amplifier unit provided by an embodiment of the present application.
  • FIG. 9 is a block diagram of a module of a clock unit provided by an embodiment of the present application.
  • FIG. 10 is a circuit structure diagram of an oscillation circuit provided by an embodiment of the present application.
  • FIG. 11 is a block diagram of another display panel power supply voltage control circuit module provided by an embodiment of the present application.
  • FIG. 12 is a circuit structure diagram of a voltage stabilization unit provided by an embodiment of the present application.
  • FIG. 13 is a module structure diagram of a display device provided by an embodiment of the present application.
  • FIG. 1 shows the module structure of the power supply voltage control circuit 10 of the display panel provided by the embodiment of the present application. For convenience of description, only the parts related to the embodiment of the present application are shown. The details are as follows:
  • the power supply voltage control circuit 10 includes a clock unit 101, a first conductive unit 102, a second conductive unit 103, and an operational amplifier unit 104.
  • the clock unit 101 generates a clock signal.
  • the clock unit 101 can generate clock signals with different levels, and the clock signal can enable the power supply voltage control circuit 10 to realize different Vcom voltage compensation functions.
  • the controllability of the power supply voltage control circuit 10 is relatively low. Strong; through the clock unit 101 to control the working state of the power supply voltage control circuit 10, through the clock unit 101 can enable the power supply voltage control circuit 10 to play the best Vcom voltage compensation function, extremely practical value.
  • the first conductive unit 102 the first conductive end of the first conductive unit 102 is connected to the power supply V2
  • the control terminal of the first conductive unit 102 is connected to the clock unit 101
  • the first conductive unit 102 conducts according to the clock signal On or off, and the first conductive unit 102 is turned on to generate a power drive signal.
  • the clock signal generated by the clock unit 101 can control the first conductive unit 102 to be turned on or off; if the Vcom voltage of the display panel is pulled, the first conductive unit 102 can be immediately turned on by the clock signal ;
  • the power supply V2 can output stable power to the first conductive unit 102, and then the first conductive unit 102 generates a power drive signal according to the power in the power supply V2, and the second conductive end of the first conductive unit 102 will be
  • the power supply driving signal is output to the operational amplifier unit 104; the power supply driving signal can drive the power supply voltage control circuit 10 to realize the Vcom voltage compensation function, and then the power supply driving signal can adjust the working state of the power supply voltage control circuit 10; when the data in the display panel When the line and the scanning line are turned off, the first conductive unit 102 is turned on, and the power driving signal can prevent the Vcom voltage in the display panel from drastically decreasing, ensuring that the Vcom voltage in the display panel can always be in the rated power supply state.
  • the second conductive unit 103, the control terminal of the second conductive unit 103 is connected to the clock unit 101, the first conductive terminal of the second conductive unit 103 is connected to the power supply voltage output terminal V1 of the display panel, and the second conductive unit
  • the second conducting terminal of 103 is the first voltage output terminal OUT1 of the power supply voltage control circuit 10, and the second conducting unit 103 is turned on or off according to the clock signal.
  • the second conductive unit 103 when the clock unit 101 outputs a clock signal to the second conductive unit 103, the second conductive unit 103 can be controlled to be turned on or off by the clock signal; combining with the above, if the Vcom voltage in the display panel When being pulled, the first conductive unit 102 is turned on by the clock signal, and the second conductive unit 103 is turned off. At this time, the power supply driving signal is generated by the first conductive unit 102.
  • the power supply voltage control circuit 10 according to the power driving signal is The Vcom voltage can be amplified and output, thereby preventing the abnormality of the video display effect of the display panel; if the Vcom voltage in the display panel is not pulled, the first conductive unit 102 is turned off by the clock signal, and the second conductive unit 103 is turned on, and the first conductive unit 102 generates a power driving signal. At this time, the power supply voltage control circuit 10 does not play the role of Vcom voltage compensation.
  • the power supply voltage output terminal V1 of the display panel passes through the The two conductive units 103 directly output the Vcom voltage; in this embodiment, the Vcom voltage in the display panel is in a normal state , There is no need to compensate the Vcom voltage, the Vcom voltage can be directly output through the second conducting end of the second conducting unit 103, and in this embodiment, by controlling the on and off states of the first conducting unit 102 and the second conducting unit 103 , So that the power supply voltage control circuit 10 can be in different working states, that is, the Vcom voltage in the display panel can always be in the rated amplitude range, and the working efficiency of the power supply voltage control circuit 10 can be improved to avoid the power supply voltage control circuit 10
  • the intermediate voltage compensation step is too complicated, and the operation of the power supply voltage control circuit 10 in this embodiment is simpler.
  • the operational amplifier unit 104 the first input terminal of the operational amplifier unit 104 is connected to the power supply voltage output terminal V1 of the display panel, the second input terminal of the operational amplifier unit 104 is connected to the reference voltage signal Vref, and the operational amplifier unit 104 Is connected to the second conducting end of the first conductive unit 102, and the operational amplifying unit 104 amplifies and outputs the power voltage of the display panel according to the power driving signal.
  • the two input terminals (the first input terminal and the second input terminal) of the operational amplification unit 104 are respectively connected to different voltage signals, and the operational amplification unit 104 can realize the function of differential amplification of the two input signals.
  • the operational amplifier 104 can compensate and amplify the Vcom voltage of the display panel, and the output terminal of the operational amplifier 104 serves as the second voltage output terminal OUT2 of the power supply voltage control circuit 10 through the second voltage output terminal OUT2
  • the amplified Vcom voltage can be output to the display panel to drive the screen of the display panel to achieve a normal display state; specifically, when the second conductive end of the first conductive unit 102 outputs a power drive signal to the operational amplification unit
  • the power supply terminal of 104 indicates that the Vcom voltage of the display panel is pulled.
  • the operational amplifier unit 104 With this power supply driving signal, you can activate the differential amplification function of the operational amplifier unit 104.
  • the Vcom voltage of the display panel can be amplified and output, so that The Vcom voltage of the display panel can return to the normal amplitude range; when the first conductive unit 10 The second conduction terminal of 2 does not output the power drive signal to the operational amplifier unit 104, which means that the Vcom voltage of the display panel is not pulled, the operational amplifier unit 104 is in a stopped working state, and the power supply voltage control circuit 10 is not functioning Vcom voltage compensation function.
  • the first voltage output terminal OUT1 of the power supply voltage control circuit 10 can directly output the Vcom voltage of the display panel; therefore, in this embodiment, the operation state and operation of the operational amplifier unit 104 can be controlled by the power supply driving signal Convenient, through the operation and amplifying unit 104, the Vcom voltage of the display panel can be compensated, so that the display panel can obtain the Vcom voltage of normal amplitude, and the display panel always has a normal and clear video display effect, bringing a good visual experience to the user .
  • the Vcom voltage in the display panel can be monitored and amplified through four circuit modules.
  • the circuit structure has extremely high flexibility and strong compatibility; if the Vcom voltage in the display panel is not pulled, pass The first voltage output terminal OUT1 of the power supply voltage control circuit 10 can directly output the Vcom voltage.
  • the power supply voltage control circuit 10 does not play the role of Vcom voltage compensation amplification.
  • the power supply voltage control circuit 10 has extremely high power compensation efficiency; When the Vcom voltage is pulled, the power supply driving signal can drive the operational amplifier unit 104 to realize the function of differential amplification.
  • the power supply voltage control circuit 10 can compensate and amplify the Vcom voltage, thereby making the compensated and amplified Vcom voltage enable:
  • the picture display is normal, avoiding the Vcom voltage being pulled to cause the abnormal picture of the display panel, which greatly enhances the user's visual experience; and the power supply voltage control circuit 10 in this embodiment uses a circuit module to control Vcom according to the actual working conditions of the display panel
  • the voltage is compensated and output, and the compensated Vcom voltage can Meet the needs of the display panel rated operating power to overcome the exemplary power supply voltage boost circuit technique can not make the enhanced voltage Vcom to the rated input power of the standard display panel, the display panel screen of the display resulting in poor quality problems.
  • the compensation amplification capability of the operational amplification unit 104 for the Vcom voltage can be adjusted according to the specific type of the display panel, so that the above-mentioned power supply voltage control circuit 10 can be applied to various types of display panels, and correspondingly improved
  • the Vcom voltage in the display panel is extremely compatible and easy to operate, which solves the problem that the traditional power supply voltage enhancement circuit can only be applied to specific types of display panels, the scope of application is narrow, and the practical value is not high.
  • the first conductive unit 102 is turned on, and the second conductive unit 103 is turned off.
  • the first conductive unit 103 When the clock signal is in the second level state, the first conductive unit 103 is turned off, and the second conductive unit 103 is turned on.
  • the first level state of the clock signal can be either a high level state or a low level state, which is not limited, and the first level state and the second level state of the clock signal are phase-interleaved Exemplarily, when the first level state of the clock signal is a high level state, the second level state of the clock signal is a low level state.
  • the on-off state of the first conductive unit 102 and the second conductive unit 103 can be determined by the level state of the clock signal. If the scan line or the data line in the display panel is turned off, the Vcom voltage is pulled When the clock signal generated by the clock unit 101 is in the first level state, the clock signal can be used to drive the power supply voltage control circuit 10 to achieve a voltage amplification effect to amplify the Vcom voltage of the display panel to prevent the screen in the display panel The effect is abnormal; if the Vcom voltage in the display panel is within the normal amplitude range, the clock signal generated by the clock unit 101 is in the second level state, the first conductive unit 102 is turned off by the clock signal, and the second conductive unit 103 is turned on.
  • the power supply voltage control circuit 10 does not implement the compensation and amplification operation for the Vcom voltage.
  • the first voltage output terminal OUT1 of the power supply voltage control circuit 10 can directly output the Vcom voltage of the display panel, and the Vcom voltage can ensure the display
  • the video / image display in the panel is normal, and the clock signal can be used to increase the power supply voltage control circuit 10 Control efficiency; therefore, in this embodiment, the voltage compensation capability of the power supply voltage control circuit 10 can be changed in real time by the level state of the clock signal, the operation is simple, and the power supply voltage control circuit 10 has strong maneuverability, regardless of the Vcom voltage in the display panel Whether it is pulled or the Vcom voltage in the display panel is not pulled, the power supply voltage control circuit 10 in this embodiment can provide the rated Vcom voltage to the display panel, so as to improve the display quality of the screen in the display panel and bring the user Good user experience.
  • FIG. 2 shows another module structure of the power supply voltage control circuit 10 of the display panel provided in this embodiment.
  • the power supply voltage control circuit 10 further includes: a reference voltage generating unit 201; the reference voltage generating unit 201 is connected between the second input terminal of the operational amplifier unit 104 and the ground GND, the reference voltage generating unit 201 generates a reference voltage signal Vref, and the reference The power generation unit 201 outputs the reference voltage signal Vref to the operational amplifier unit 104; through the reference voltage signal Vref, the reference voltage information can be provided to the operational amplifier unit 104.
  • the operational amplification unit 104 implements a differential amplification function for the Vcom voltage according to the difference between the Vcom voltage and the reference voltage signal Vref; when the Vcom voltage in the display panel is pulled, the operational amplification unit 104 can perform Compensation amplification and output; thus the reference power generation unit 201 in this embodiment can enable
  • the power supply voltage control circuit 10 realizes normal circuit functions, and ensures that the Vcom voltage of the display panel can be continuously within the rated power supply range of the display panel.
  • FIG. 3 shows the circuit structure of the reference voltage generating unit 201 provided in this embodiment.
  • the reference voltage generating unit 201 includes: a first resistor R1 and a second resistor R2 Where the first end of the first resistor R1 and the second end of the second resistor R2 are connected in common to the second input end of the operational amplifier unit 104, the second end of the first resistor R1 is grounded, and the second end of the second resistor R2 The output terminal of the operational amplification unit 104 is terminated.
  • the reference voltage signal Verf can be provided to the operational amplifier unit 104 through the first resistor R1 and the second resistor R2. Furthermore, in this embodiment, the reference voltage generating unit 201 has a simplified circuit structure, and the circuit manufacturing cost is low. The reference voltage signal generated by the reference voltage generating unit 201 can guarantee the stable and safe operation of the operational amplifier unit 104; and the circuit structure of the reference voltage generating unit 201 has strong compatibility, which helps to improve the power supply voltage control circuit 10 Scope of application.
  • FIG. 4 shows another circuit structure of the reference voltage generating unit 201 provided in this embodiment.
  • the reference voltage generating unit 201 includes: a reference voltage source V3 , A sixth resistor R6, a seventh resistor R7 and a third capacitor C3.
  • the first terminal of the sixth resistor R6, the first terminal of the seventh resistor R7, and the first terminal of the third capacitor C3 are commonly connected to the operational amplifier unit 104
  • the second input terminal, the second terminal of the seventh resistor R7 is grounded GND
  • the second terminal of the third capacitor C3 is grounded GND
  • the positive terminal of the reference voltage source V3 is connected to the second terminal of the sixth resistor R6, and the negative terminal of the reference voltage source V3 Ground GND.
  • the reference voltage source V3 is a + 5V DC power supply; further, in this embodiment, the reference voltage generating unit 201 generates a reference voltage signal Verf through the reference voltage source V3, and the amplitude of the reference voltage signal Vref It can be adjusted in real time, so that the operational amplifier unit 104 can stably realize the function of voltage amplification; the reference voltage generating unit 201 in this embodiment has a simplified circuit structure, which guarantees the safe and stable operation of the power supply voltage control circuit 10 and is compatible Sex is stronger.
  • FIG. 5 shows the circuit structure of the first conductive unit 102 provided in this embodiment.
  • the first conductive unit 102 includes a first switch tube; wherein, the first switch The control electrode of the tube is connected to the clock unit 101, the first conductive electrode of the first switch tube is connected to the power supply V2, and the second conductive electrode of the first switch tube is connected to the power supply terminal of the operational amplifier unit 104.
  • the first conductive unit 102 can be turned on or off through the first switch tube.
  • the clock unit 101 outputs a clock signal to the control electrode of the first switch tube, when the clock signal has a different In the level state, the first conduction pole and the second conduction pole of the first switching tube can be turned on or off.
  • the second conducting electrode of the first switch tube outputs the power drive signal to the operational amplifier unit 104, and then the operational amplifier unit 104 can be driven by the power drive signal to realize the voltage amplification function to ensure that the Vcom voltage in the display panel is at Rated power supply state; therefore, in this embodiment, the first switch tube is used to accurately and quickly generate the power supply driving signal, thereby improving the signal processing rate in the power supply voltage control circuit 10.
  • the first switch tube is a MOS or transistor; exemplarily, the first switch tube is a MOS tube, wherein the gate of the MOS tube is connected to the clock unit 101, and the first conduction of the MOS tube The pole is connected to the power supply V2, and the second conducting electrode of the MOS tube is connected to the power supply terminal of the operational amplifier unit 104.
  • the clock unit 101 outputs a clock signal to the gate of the MOS tube
  • the MOS tube can be controlled to conduct through the clock signal Or it can be turned off. Therefore, in this embodiment, the power driving signal can be generated through the MOS tube, which greatly simplifies the circuit structure of the first conductive unit 102.
  • the first conductive unit 102 includes a plurality of cascaded switch tubes; in the plurality of cascaded switch tubes, the second conducting electrode of the previous switch is connected to the latter switch
  • the first conduction pole of the tube, the first conduction pole of the first switch tube is connected to the power supply V2
  • the second conduction pole of the last switch tube is connected to the power supply terminal of the operational amplifier unit 104, and the control pole of each switch tube Access clock unit 101.
  • the first conductive unit 102 uses a plurality of switch tubes to realize the on-off control function of the circuit, which is more stable and avoids interference of external noise on the working state of the first conductive unit 102.
  • FIG. 6 shows the circuit structure of the second conductive unit 103 provided in this embodiment.
  • the second conductive unit 103 includes a second switch tube;
  • the control electrode is connected to the clock unit 101, the first conductive electrode of the second switch is connected to the power supply voltage output terminal V1 of the display panel, and the second conductive electrode of the second switch is the first voltage output terminal OUT1 of the power supply voltage control circuit 101.
  • the clock unit 101 when the Vcom voltage of the display panel is not pulled, the clock unit 101 outputs a clock signal to the control electrode of the second switch tube, and the second switch tube is turned on by the clock signal.
  • a conducting electrode and a second conducting electrode are equivalent to a "short circuit", and the power supply voltage output terminal of the display panel directly passes the Vcom voltage through the first conducting electrode of the second switching tube and the second conducting of the second switching tube Parallel output, at this time, the first input terminal of the operational amplifier unit 104 cannot be connected to the Vcom voltage, the operational amplifier unit 104 is in a working stop state, and the power supply voltage control circuit 10 does not realize the amplification compensation function for the Vcom voltage of the display panel.
  • the first voltage output terminal OUT1 of the voltage control circuit 10 can directly output the Vcom voltage, then the display panel Vcom voltage can maintain the video in the display panel without compensating and amplifying; therefore, in this embodiment, the second switch tube can increase the power supply
  • the control efficiency of the voltage control circuit 10 ensures the clarity of the video / image in the display panel.
  • the second switch tube is a MOS tube and a transistor; exemplarily, the second switch tube is a MOS tube, then the gate of the MOS tube is connected to the clock unit 101, and the first conducting electrode of the MOS tube Connected to the power supply voltage output terminal V1 of the display panel, the second conducting electrode of the MOS tube is the first voltage output terminal OUT1 of the power supply voltage control circuit 10; when the clock unit 101 outputs the clock signal to the gate of the MOS tube, the clock signal is passed
  • the MOS tube is turned on, and the power supply voltage output terminal V1 of the display panel can directly output the Vcom voltage through the MOS tube, which not only simplifies the circuit structure of the power supply voltage control circuit 10, but also helps to improve the control efficiency of the power supply voltage control circuit 10.
  • the second conductive unit 103 includes a plurality of cascaded switch tubes; among the plurality of cascaded switch tubes, the second conducting electrode of the previous switch is connected to that of the latter switch tube
  • the first conducting electrode, the first conducting electrode of the first switch is connected to the power supply voltage output terminal V1 of the display panel, and the second conducting electrode of the last switch is the first voltage output terminal OUT1 of the power supply voltage control circuit 10,
  • the control pole of each switch is connected to the clock unit 101.
  • this embodiment improves the working stability of the second conductive unit 103 through a plurality of cascaded switch tubes, so that the power supply voltage control circuit 10 can be in an optimal working state, and the Vcom voltage of the display panel can be amplified in time And output.
  • the first conductive unit 102 and the second conductive unit 103 can realize their own on or off through the switch tube, and the compatibility of the circuit is extremely strong; and the first conductive The unit 102 and the second conductive unit 103 have completely opposite conduction polarities.
  • the second conductive unit 103 is turned off; otherwise, if the first conductive unit 102 is turned off, the second conductive unit 103 is turned on Therefore, through the conduction between the first conductive unit 102 and the second conductive unit 103 and off can be achieved on the Vcom voltage amplification function, easy to operate, greatly improving the power supply voltage control circuit 10 in this embodiment for display The compensation ability of the panel's Vcom voltage.
  • FIG. 7 shows the circuit structure of the operational amplifier unit 104 provided in this embodiment.
  • the operational amplifier unit 104 includes: an operational amplifier; wherein, the first input of the operational amplifier The power supply voltage output terminal V1 of the display panel is connected, the second input terminal of the operational amplifier is connected to the reference voltage signal Vref, the power supply terminal of the operational amplifier is connected to the second conducting terminal of the first conductive unit 102, and the output terminal of the operational amplifier is the power supply The second voltage output terminal OUT2 of the voltage control circuit 10.
  • the first input terminal of the operational amplifier may be either the forward input terminal of the operational amplifier or the reverse input terminal of the operational amplifier; for example, if the first input terminal of the operational amplifier is a positive input terminal, Then the second input terminal of the operational amplifier is an inverting input terminal.
  • the operational state of the operational amplifier can be controlled by the power drive signal, only when the first When the conductive unit 102 outputs the power drive signal to the operational amplifier, the operational amplifier can be driven to be in a normal working state through the power drive signal; if the first conductive unit 102 does not output the power drive signal to the operational amplifier, the operational amplifier is in operation Stopped state; therefore, when the Vcom voltage of the display panel is pulled, the reference voltage signals Vref and Vcom voltages are respectively connected through the first input terminal and the second input terminal of the operational amplifier; according to the difference between the reference voltage signals Vref and Vcom voltages , The operational amplifier differentially amplifies and outputs the Vcom voltage, so the second voltage output terminal OUT2 of the power supply voltage control circuit 10 can output the amplified Vcom voltage to the display panel, and the amplified Vcom voltage provides the rated voltage
  • the operational amplification unit 104 includes: a comparator; wherein, the first input terminal of the comparator is connected to the power supply voltage output terminal V1 of the display panel, and the second input terminal of the comparator is connected to the reference voltage In the signal Vref, the power supply terminal of the comparator is connected to the second conducting terminal of the first conductive unit 102, and the output terminal of the comparator is the second voltage output terminal OUT2 of the power supply voltage control circuit 10.
  • the first input terminal of the comparator may be either a positive input terminal or a reverse input terminal.
  • the first input terminal of the comparator is a positive input terminal, and the second input terminal of the comparator It is the reverse input terminal; the voltage amplification of the comparator can be controlled by the power drive signal.
  • the power drive signal can drive the comparator to achieve the voltage comparison amplification; when the comparator When the reference voltage signal and the Vcom voltage are connected to the first input terminal and the second input terminal, the Vcom voltage of the display panel can be amplified and output through the comparator, and then the amplified Vcom voltage can be output to the output terminal of the comparator Display panel, so that the display panel can display normal and stable images / videos, and bring a good visual experience to the user; thus, this embodiment uses a comparator to ensure that the Vcom voltage of the display panel can always be maintained in a normal range.
  • the structure is simple and the compatibility is extremely strong, which effectively improves the application range of the power supply voltage control circuit 10.
  • FIG. 8 shows another circuit structure of the operational amplifier unit 104 provided in this embodiment.
  • the operational amplifier unit 104 includes: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first transistor Q1 and a second transistor Q2.
  • the first terminal of the third resistor R3 and the first terminal of the fourth resistor R4 are connected together to form the power supply terminal of the operational amplifier unit 104, the second terminal of the third resistor R3 is connected to the collector of the first transistor Q1, and the fourth resistor
  • the second end of R4 is connected to the collector of the second transistor Q2, the emitter of the first transistor Q1 and the emitter of the second transistor Q2 are connected to the first end of the fifth resistor R5, the fifth resistor
  • the second terminal of R5 is grounded to GND;
  • the base of the first transistor Q1 is the first input terminal of the operational amplifier unit 104, the base of the second transistor Q2 is the second input terminal of the operational amplifier unit 104, and the fourth resistor R4
  • the second terminal of the and the collector of the second transistor Q2 are connected together to form the output terminal of the operational amplifier unit 104.
  • the operational amplification unit 104 in this embodiment adopts a simplified circuit structure It realizes the precise amplification function of Vcom voltage, which has extremely high practical value.
  • FIG. 9 shows the module structure of the clock unit 101 provided in this embodiment.
  • the clock unit 101 includes: an oscillation circuit 701 and a clock chip 702.
  • the oscillation circuit 701 generates an oscillation signal.
  • the oscillation circuit 701 can generate a corresponding oscillation signal according to the amplitude of the Vcom voltage in the display panel, wherein the oscillation signal can provide the oscillation frequency to the clock chip 702 when the amplitude of the Vcom voltage of the display panel changes ,
  • the oscillation signal has different oscillation frequencies, and the working state of the clock unit 101 can be adjusted by the oscillation signal, so that the power supply voltage control circuit 10 can achieve the best compensation effect on the Vcom voltage of the display panel, and improve the power supply voltage control circuit 10 maneuverability.
  • FIG. 10 shows the circuit structure of the oscillation circuit 701 provided in this embodiment.
  • the oscillation circuit 701 includes: a first capacitor C1, a second capacitor C2, and a first crystal oscillator Y1; wherein the first terminal of the first capacitor C1 and the first terminal of the second capacitor C2 are connected to the ground GND, the second terminal of the first capacitor C1 and the first terminal of the first crystal oscillator Y1 are connected together to form the oscillation circuit 701
  • the first oscillation signal output terminal, the second terminal of the second capacitor C2 and the second terminal of the first crystal oscillator Y1 are connected together to form a second oscillation signal output terminal of the oscillation circuit 701, wherein the first oscillation signal of the oscillation circuit 701 is output And the second oscillation signal output of the oscillation circuit 701 are connected to the clock chip 701; when the first crystal oscillator Y1 generates oscillation signals with different oscillation frequencies, the first oscillation signal output terminal and the second oscillation signal of the oscillation circuit 70
  • the clock chip 702 the oscillation signal input and output pins of the clock chip 702 are connected to the oscillation circuit 701, and the clock chip 702 generates a clock signal.
  • the model of the clock chip 702 is: DS1302 or SD2201; in this embodiment, various types of clock chips 702 can be applied to the clock unit 101, so that the clock unit 101 generates a corresponding clock signal.
  • the clock chip in the embodiment can realize a more complicated signal conversion function, and has extremely strong compatibility.
  • the oscillating circuit 701 when the oscillating circuit 701 outputs an oscillating signal to the clock chip 702, since the oscillating signal has different oscillating frequencies, the oscillating signal can be used to drive the clock chip 702 in different operating states; for example, when displaying When the Vcom voltage in the panel is pulled, the oscillating circuit 701 generates an oscillating signal that provides the corresponding oscillating frequency to the clock chip 702, so that the clock chip 702 generates a clock signal with a specific level state, by which the power supply can be driven
  • the voltage control circuit 10 amplifies and outputs the Vcom voltage of the display panel to ensure that the Vcom voltage of the display panel can be within the rated amplitude range; therefore, in this embodiment, the oscillator circuit 701 can quickly generate a clock signal, avoiding the display panel The problem that the Vcom voltage of the display panel is pulled down for a long time when the scan line and the data line are suddenly turned off.
  • the clock unit 101 According to the module structure of the clock unit 101 shown in FIG. 9, the clock unit 101 generates a corresponding clock signal through the oscillation circuit 701 and the clock chip 702, the circuit structure is simple, and those skilled in the art can select the specific clock chip 702 according to actual needs
  • the model and circuit structure have strong flexibility; therefore, the clock unit 101 in this embodiment can ensure that the power supply voltage control circuit 10 has a corresponding voltage compensation function, which improves the clarity and stability of the video / image display in the display panel Sex.
  • FIG. 11 shows another module structure of the power supply voltage control circuit 10 of the display panel provided in this embodiment. Compared with the module structure of the power supply voltage control circuit 10 in FIG.
  • the power supply voltage control circuit 10 of the display panel in 11 further includes a voltage stabilizing unit 100.
  • the voltage stabilizing unit 100 is connected to the output terminal of the operation amplifying unit 104, and the voltage stabilizing unit 100 performs voltage stabilizing processing on the power supply voltage of the amplified display panel.
  • FIG. 12 shows a specific circuit structure of the voltage stabilizing unit 100 provided in this embodiment, as shown in FIG. 12, wherein the voltage stabilizing unit 100 includes: a voltage stabilizing chip U1, a second crystal oscillator Y2, the third crystal oscillator Y3, the first voltage stabilizing diode YD1 and the second voltage stabilizing diode YD2; wherein, the power input pin Vin of the voltage stabilizing chip U1 and the first end of the second crystal oscillator Y1 are connected together to form the voltage stabilizing unit 100
  • the voltage input terminal, the first terminal of the third crystal oscillator Y3, the cathode of the second voltage stabilizing diode YD2 and the power output pin Vout of the voltage stabilizing chip U1 are connected together to form the voltage output terminal of the voltage stabilizing unit 100.
  • the two ends, the cathode of the first zener diode VD1, the anode of the second zener diode VD2, and the second end of the third crystal oscillator Y3 are connected to the ground pin of the zener chip U1, and the anode of the first zener diode VD1 is grounded. GND; the voltage input terminal of the voltage stabilizing unit 100 is connected to the output terminal of the operational amplifier unit 104.
  • the voltage stabilizing chip U1 is a model: LM2940CT series chip or LM2930T series chip; therefore, the voltage stabilizing unit 100 in this embodiment uses the voltage stabilizing chip U1 to stabilize the Vcom voltage of the display panel
  • the pressure function improves the operation safety of the display panel.
  • the display panel can display more complete and clear images / videos.
  • this embodiment provides a display panel including: at least one scan line, at least one data line, a gate driver, a source driver, and a power supply voltage control circuit of the display panel .
  • At least one scan line is arranged in an array in the vertical direction.
  • At least one data line is arranged in an array in the horizontal direction.
  • the gate driver is connected to the scan line, and the gate driver generates a scan signal.
  • the source driver the source driver is connected to the data line, and the source driver generates the data signal
  • the power supply voltage control circuit of the display panel is connected to the scanning line and the data line.
  • the power supply voltage control circuit includes a clock unit, a first conductive unit, a second conductive unit, and an operational amplifier unit.
  • the clock unit generates a clock signal.
  • a first conductive unit a first conductive end of the first conductive unit is connected to a power supply, a control terminal of the first conductive unit is connected to a clock unit, the first conductive unit is turned on or off according to a clock signal, and the first conductive unit
  • the power supply driving signal is generated when it is turned on.
  • the second conductive unit, the control terminal of the second conductive unit is connected to the clock unit, the first conductive terminal of the second conductive unit is connected to the power supply voltage output terminal of the display panel, and the second conductive terminal of the second conductive unit is the power supply voltage control circuit
  • the first voltage output terminal of the second conductive unit is turned on or off according to the clock signal.
  • the operational amplifier unit the first input terminal of the operational amplifier unit is connected to the power supply voltage output terminal of the display panel, the second input terminal of the operational amplifier unit is connected to the reference voltage signal, and the power supply terminal of the operational amplifier unit is connected to the second conductor of the first conductive unit Through the end, the operational amplifier unit amplifies and outputs the power voltage of the display panel according to the power drive signal.
  • the gate driver and the source driver can be implemented using specific circuit structures in the exemplary technology; and the power supply voltage control circuit of the display panel in this embodiment is shown in FIG. 1 The power supply voltage control circuit 10 of the panel.
  • the power supply voltage control circuit further includes:
  • the reference voltage generating unit is connected between the second input terminal of the operational amplifier unit and ground, and the reference voltage generating unit generates a reference voltage signal.
  • the power supply voltage control circuit further includes:
  • a voltage stabilizing unit the voltage stabilizing unit is connected to the output end of the operation amplifying unit, and the voltage stabilizing unit performs voltage stabilizing processing on the power supply voltage of the amplified display panel.
  • each circuit module in the display panel of this embodiment corresponds to the power supply voltage control circuit 10 in FIGS. 1 to 12, for the specific implementation of the display panel in this embodiment, refer to the embodiments of FIGS. 1 to 12, here No longer.
  • FIG. 13 shows the module structure of the display device 130 provided in this embodiment.
  • the display device 130 includes a display panel 901.
  • the internal circuit structure and working principle of the display panel 901 can be referred to FIGS.
  • the embodiment of FIG. 12 will not be repeated here; referring to the embodiments of FIGS. 1 to 12, if the Vcom voltage of the display panel 901 is pulled, the Vcom voltage can be amplified and output by the power supply voltage control circuit to display
  • the panel 901 displays a high-definition and normal picture according to the amplified Vcom voltage, which brings a good visual experience to the user; and the power supply voltage control circuit in this embodiment has a relatively simplified circuit structure and is extremely compatible.
  • the voltage control circuit can make the amplified Vcom voltage meet the rated input power requirements of the display panel 901, the display device 130 displays high-definition, dynamic video according to the actual needs of users, and the display device 130 can be applied to various industrial fields High; effectively solves the problem that the Vcom voltage of the display panel in the exemplary technology is pulled, causing the display panel to draw Display abnormal, the problem of poor user's visual experience.
  • the above-mentioned display device 130 is: LCD (Liquid Crystal), OLED (Organic Electroluminescence Display) or QLED (Quantum Dot Light Emitting Diodes). .
  • the power supply voltage control circuit in this application has a simplified circuit structure, is extremely compatible, can timely increase the Vcom voltage of the display panel, greatly improves the display quality of the display panel, and brings a good Visual experience; furthermore, the power supply voltage control circuit in this application has extremely important positive significance for promoting the development of display technology.

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Abstract

一种显示面板（901）的电源电压控制电路（10）、显示面板（901）及显示装置（130），电源电压控制电路（10）包括：时钟单元（101）、第一导电单元（102）、第二导电单元（103）及运算放大单元（104）；电源电压控制电路（10）对电源电压进行放大。

Description

显示面板的电源电压控制电路、显示面板及显示装置 技术领域
本申请属于电子技术领域，尤其涉及一种显示面板的电源电压控制电路、显示面板及显示装置。
背景技术
传统的电源电压增强电路对于电源电压(Vcom电压)的增强能力无法进行自适应调整，无法满足显示面板的额定输入电源要求，实用价值不高，无法向显示面板提供具有正常幅值的Vcom电压。
申请内容
本申请一目的在于提供一种显示面板的电源电压控制电路、显示面板及显示装置，包括但不限于解决：显示面板中电源电压增强电路的兼容性较低，电路结构的灵活性不强，无法使Vcom电压达到显示面板额定输入电源的要求的问题。
为解决上述技术问题，本申请实施例采用的技术方案是：一种显示面板的电源电压控制电路，包括：
时钟单元，生成时钟信号；
第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电源电压进行放大并输出。
本申请的另一目的在于提供一种显示面板，包括：
至少一条扫描线；
至少一条数据线；
栅极驱动器，所述栅极驱动器接所述扫描线，所述栅极驱动器生成扫描信号；
源极驱动器，所述源极驱动器接所述数据线，所述源极驱动器生成数据信号；以及
显示面板的电源电压控制电路，所述电源电压控制电路与所述扫描线以及所述数据线连接，其中，所述电源电压控制电路包括：
时钟单元，生成时钟信号；
第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电源电压进行放大并输出。
本申请的再一目的在于提供一种显示装置，包括显示面板；
其中，所述显示面板包括：
至少一条扫描线；
至少一条数据线；
栅极驱动器，所述栅极驱动器接所述扫描线，所述栅极驱动器生成扫描信号；
源极驱动器，所述源极驱动器接所述数据线，所述源极驱动器生成数据信号；以及
显示面板的电源电压控制电路，所述电源电压控制电路与所述扫描线以及所述数据线连接，其中，所述电源电压控制电路包括：
时钟单元，生成时钟信号；
第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电 源电压进行放大并输出。
本申请实施例通过运算放大单元对显示面板的电源电压进行补偿放大并输出，能够使显示面板中的Vcom电压始终保持在稳定的幅值范围，防止显示面板中的Vcom电压在扫描线和数据线关断时被拉扯；通过本申请补偿后的Vcom电压能够使显示面板工作在正常状态，显示面板能够呈现完整、清晰的视频/图像，给用户带来良好的视觉体验；有效地解决了示例性技术中电源电压增强电路无法使增强后的Vcom电压达到显示面板额定输入电源的要求。
附图说明
为了更清楚地说明本发明实施例中的技术方案，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它的附图。
图1是本申请实施例提供的一种显示面板的电源电压控制电路的模块结构图；
图2是本申请实施例提供的另一种显示面板的电源电压控制电路的模块结构图；
图3是本申请实施例提供的一种基准电压生成单元的电路结构图；
图4是本申请实施例提供的另一种基准电压生成单元的电路结构图；
图5是本申请实施例提供的一种第一导电单元的电路结构图；
图6是本申请实施例提供的一种第二导电单元的电路结构图；
图7是本申请实施例提供的一种运算放大单元的电路结构图；
图8是本申请实施例提供的另一种运算放大单元的电路结构图；
图9是本申请实施例提供的一种时钟单元的模块结构图；
图10是本申请实施例提供的一种振荡电路的电路结构图；
图11是本申请实施例提供的另一种显示面板的电源电压控制电路的模块结构图；
图12是本申请实施例提供的一种稳压单元的电路结构图；
图13本申请实施例提供的一种显示装置的模块结构图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。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。
需说明的是，当部件被称为“固定于”或“设置于”另一个部件，它可以直接在另一个部件上或者间接在该另一个部件上。当一个部件被称为是“连接于”另一个部件，它可以是直接或者间接连接至该另一个部件上。术语“上”、“下”、“左”、“右”等指示的方位 或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述，而不是指示或暗示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专利的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。术语“第一”、“第二”仅用于便于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明技术特征的数量。“多个”的含义是两个或两个以上，除非另有明确具体的限定。
为了说明本申请所述的技术方案，以下结合具体附图及实施例进行详细说明。
图1示出了本申请实施例提供的显示面板的电源电压控制电路10的模块结构，为了便于说明，仅示出了与本申请实施例相关的部分，详述如下：
如图1所示，在本实施例中，电源电压控制电路10包括：时钟单元101、第一导电单元102、第二导电单元103以及运算放大单元104。
在本实施例中，时钟单元101，生成时钟信号。
在本实施例中，时钟单元101能够生成具有不同电平状态的时钟信号，进而通过时钟信号可使电源电压控制电路10实现不同的Vcom电压补偿功能，该电源电压控制电路10的可控性较强；通过时钟单元101操控控制电源电压控制电路10的工作状态，通过该时钟单元101能够使电源电压控制电路10能够发挥最佳的Vcom电压补偿功能，实用价值极强。
在本实施例中，第一导电单元102，第一导电单元102的第一导通端接供电电源V2，第一导电单元102的控制端接时钟单元101，第一导电单元102根据时钟信号导通或者关断，并且第一导电单元102导通时生成电源驱动信号.
在本实施例中，通过时钟单元101所生成的时钟信号能够控制第一导电单元102导通或者关断；若显示面板的Vcom电压被拉扯，通过时钟信号能够立即使第一导电单元102导通；供电电源V2能够将稳定的电能输出至第一导电单元102，进而第一导电单元102根据供电电源V2中的电能生成电源驱动信号，并通过第一导电单元102的第二导通端将该电源驱动信号输出至运算放大单元104；通过该电源驱动信号能够驱动电源电压控制电路10实现Vcom电压补偿功能，进而通过电源驱动信号能够调整电源电压控制电路10的工作状态；当显示面板中的数据线和扫描线被关断瞬间，第一导电单元102导通，进而通过电源驱动信号可防止显示面板中的Vcom电压大幅降低，保障了显示面板中的Vcom电压始终能够处于额定供电电源状态。
在本实施例中，第二导电单元103，第二导电单元103的控制端接时钟单元101，第二导电单元103的第一导通端接显示面板的电源电压输出端V1，第二导电单元103的第二导通端为电源电压控制电路10的第一电压输出端OUT1，第二导电单元103根据时钟信号导通或者关断。
在本实施例中，当时钟单元101将时钟信号输出至第二导电单元103，通过时钟信号能够控制第二导电单元103导通或者关断；结合上文所述，若显示面板中的Vcom电压被拉扯时，通过时钟信号使第一导电单元102导通，并且是第二导电单元103关断，此时通过第一导电单元102生成电源驱动信号，该电源电压控制电路10根据电源驱动信号即可对Vcom电压进行放大并且输出，进而防止显示面板的视频显示效果出现异常情况；若显示面板中的Vcom电压未被拉扯，则通过时钟信号使第一导电单元102关断，并且第二导电单元103导通，第一导电单元102为生成电源驱动信号，此时电源电压控制电路10并未发挥Vcom电压补偿作用，由于第二导电单元103导通，进而显示面板的电源电压输出端V1通过第二导电单元103直接输出Vcom电压；在本实施例中，由于显示面板中的Vcom电压处于正常状态，并不需要对Vcom电压进行补偿操作，通过第二导电单元103的第二导通端能够直接输出Vcom电压，进而本实施例通过控制第一导电单元102和第二导电单元103的通断状态，使电源电压控制电路10能够处于不同的工作状态，即保障了显示面板中的Vcom电压始终能够处于额定的幅值范围，又能够提高电源电压控制电路10的工作效率，避免电源电压控制电路10中电压补偿步骤过于复杂，本实施例中的电源电压控制电路10的操作更为简便。
在本实施例中，运算放大单元104，运算放大单元104的第一输入端接显示面板的电源电压输出端V1，运算放大单元104的第二输入端接入基准电压信号Vref，运算放大单元104的电源端接第一导电单元102的第二导通端，运算放大单元104根据电源驱动信号对显示面板的电源电压进行放大并输出。
在本实施例中，运算放大单元104的两个输入端(第一输入端和第二输入端)分别接入不同的电压信号，运算放大单元104能够对两路输入信号实现差分放大的功能，进而本实施例通过运算放大单元104能够对显示面板的Vcom电压能够进行补偿放大，并且运算放大单元104的输出端作为电源电压控制电路10的第二电压输出端OUT2，通过第二电压输出端OUT2能够将放大后的Vcom电压输出至显示面板中，以驱动显示面板的画面能够实现正常的显示状态；具体的，当第一导电单元102的第二导通端将电源驱动信号输出至运算放大单元104的电源端，则说明显示面板的Vcom电压被拉扯，该电源驱动信号你能够激活运算放大单元104的差分放大功能，通过运算放大单元104能够对显示面板的Vcom电压进行放大并输出，进而使显示面板的Vcom电压能够返回至正常幅值范围内；当第一导电单元102的第二导通端并未将电源驱动信号输出至运算放大单元104，则说明显示面板的Vcom电压并未被拉扯，运算放单单元104处于停止工作状态，电源电压控制电路10并未发挥Vcom电压补偿作用，此时电源电压控制电路10的第一电压输出端OUT1能够直 接输出显示面板的Vcom电压；因此在本实施例中，通过电源驱动信号能够控制运算放大单元104的工作状态，操作简便，通过运算放大单元104能够对显示面板的Vcom电压进行补偿，使显示面板能够获取得到正常幅值的Vcom电压，显示面板始终具有正常、清晰的视频显示效果，给用户带来良好的视觉体验。
本实施例通过四个电路模块即可即可对显示面板中的Vcom电压进行监测并放大，电路的结构具有极高灵活性，兼容性较强；若显示面板中的Vcom电压未被拉扯，通过电源电压控制电路10的第一电压输出端OUT1能够直接输出Vcom电压，电源电压控制电路10并不发挥Vcom电压补偿放大作用，电源电压控制电路10具有极高的电源补偿效率；若显示面板中的Vcom电压被拉扯时，电源驱动信号能够驱动运算放大单元104实现差分放大的功能，通过电源电压控制电路10能够对Vcom电压进行补偿放大，进而使得补偿放大后的Vcom电压能够使：显示面板中的画面显示正常，避免Vcom电压被拉扯而导致显示面板的画面异常现象，极大地增强了用户的视觉体验；并且本实施例中的电源电压控制电路10采用电路模块根据显示面板的实际工作情况对Vcom电压进行补偿并输出，补偿后的Vcom电压能够符合显示面板中额定工作电源的需求，克服了示例性技术中电源电压增强电路无法使增强后的Vcom电压达到显示面板的额定输入电源标准，导致显示面板中画面显示质量不佳的问题。
同时由于本实施例中运算放大单元104对于Vcom电压的补偿放大能力可根据显示面板的具体类型进行调整，以使得上述电源电压控制电路10能够应用于各种类型的显示面板中，并相应地提高显示面板中Vcom电压，兼容性极强，操作简便，解决了传统的电源电压增强电路只能应用在特定类型的显示面板中，适用范围较窄，实用价值不高的问题。
作为一种可选的实施方式，在所述时钟信号为第一电平状态时，第一导电单元102导通，并且第二导电单元103关断。
在时钟信号为第二电平状态时，第一导电单元103关断，并且第二导电单元103导通。
可选的，时钟信号的第一电平状态即可为高电平状态也可以为低电平状态，对此不做限定，并且时钟信号的第一电平状态和第二电平状态相位交错；示例性的，当时钟信号的第一电平状态为高电平状态，则时钟信号的第二电平状态为低电平状态。
在本实施例中，通过时钟信号的电平状态即可决定第一导电单元102和第二导电单元103的通断状态，若显示面板中扫描线或者数据线被关断瞬间，Vcom电压被拉扯时，时钟单元101生成的时钟信号处于第一电平状态，进而通过该时钟信号即可驱动电源电压控制电路10实现电压放大作用，以对显示面板的Vcom电压进行放大，防止显示面板中的画面效果出现异常；若显示面板中的Vcom电压处于正常幅值范围内，时钟单元101生成的时 钟信号处于第二电平状态，通过时钟信号使第一导电单元102关断，并使第二导电单元103导通，此时电源电压控制电路10并未对Vcom电压实现补偿放大操作，通过电源电压控制电路10的第一电压输出端OUT1能够直接输出显示面板的Vcom电压，通过该Vcom电压能够保障显示面板中的视频/图像显示正常，通过该时钟信号能够提高电源电压控制电路10的控制效率；因此本实施例通过时钟信号的电平状态即可实时改变电源电压控制电路10的电压补偿能力，操作简便，电源电压控制电路10的可操控性较强，无论显示面板中的Vcom电压被拉扯还是显示面板中的Vcom电压未被拉扯，通过本实施例中的电源电压控制电路10能够向显示面板提供额定的Vcom电压，以提高了显示面板中的画面显示质量，给用户带来了良好的使用体验。
作为一种可选的实施方式，图2示出了本实施例提供的显示面板的电源电压控制电路10的另一种模块结构，相比于图1中的电源电压控制电路10，图2中的电源电压控制电路10还包括：基准电压生成单元201；基准电压生成单元201连接在运算放大单元104的第二输入端与地GND之间，基准电压生成单元201生成基准电压信号Vref，并且基准电源生成单元201将基准电压信号Vref输出至运算放大单元104；通过该基准电压信号Vref能够向运算放大单元104提供基准电压信息，当运算放大单元104接入显示面板的Vcom电压和基准电压信号Vref时，运算放大单元104根据Vcom电压和基准电压信号Vref之间的差异对Vcom电压实现差分放大功能；当显示面板中的Vcom电压被拉扯时，通过运算放大单元104能够对显示面板的Vcom电压进行补偿放大并输出；从而通过本实施例中的基准电源生成单元201能够使电源电压控制电路10实现正常的电路功能，保障了显示面板的Vcom电压能够持续地处于显示面板的额定电源范围内。
作为一种可选的实施方式，图3示出了本实施例提供的基准电压生成单元201的电路结构，如图3所示，基准电压生成单元201包括：第一电阻R1和第二电阻R2，其中，第一电阻R1的第一端和第二电阻R2的第二端共接于运算放大单元104的第二输入端，第一电阻R1的第二端接地，第二电阻R2的第二端接运算放大单元104的输出端。
在本实施例中，通过第一电阻R1和第二电阻R2可向运算放大单元104提供基准电压信号Verf，进而本实施例中基准电压生成单元201具有较为简化电路结构，电路制造成本较低，通过基准电压生成单元201所生成的基准电压信号能够保障运算放大器单元104的稳定、安全运行；并且该基准电压生成单元201的电路结构具有较强的兼容性，有助于提高电源电压控制电路10的适用范围。
作为一种可选的实施方式，图4示出了本实施例提供的基准电压生成单元201的另一种电路结构，如图4所示，其中，基准电压生成单元201包括：基准电压源V3、第六电阻 R6、第七电阻R7以及第三电容C3。
在图4所述示出基准电压生成单元201的具体电路结构中，第六电阻R6的第一端、第七电阻R7的第一端以及第三电容C3的第一端共接运算放大单元104的第二输入端，第七电阻R7的第二端接地GND，第三电容C3的第二端接地GND，基准电压源V3的正极接第六电阻R6的第二端，基准电压源V3的负极接地GND。
作为一种可选的实施方式，所述基准电压源V3为+5V直流电源；进而本实施例中基准电压生成单元201通过基准电压源V3生成基准电压信号Verf，并且基准电压信号Vref的幅值可实时进行调整，以使运算放大单元104能够稳定地实现电压放大的功能；本实施例中的基准电压生成单元201具有较为简化的电路结构，保障了电源电压控制电路10的安全稳定运行，兼容性更强。
作为一种可选的实施方式，图5示出了本实施例提供的第一导电单元102的电路结构，如图5所示，第一导电单元102包括第一开关管；其中，第一开关管的控制极接时钟单元101，第一开关管的第一导通极接供电电源V2，第一开关管的第二导通极接运算放大单元104的电源端。
在本实施例中，通过第一开关管即可实现第一导电单元102的导通或者关断，当时钟单元101将时钟信号输出至第一开关管的控制极时，当时钟信号具有不同的电平状态，则第一开关管的第一导通极和第二导通极之间能够导通或者关断，若第一开关管的第一导通极和第二导通极之间导通，则第一开关管的第二导通极将电源驱动信号输出至运算放大单元104，进而通过该电源驱动信号能够驱动运算放大单元104实现电压放大功能，以保障显示面板中的Vcom电压处于额定电源状态；因此本实施例通过第一开关管准确、快速地生成电源驱动信号，提高电源电压控制电路10中的信号处理速率。
在本实施例中，可选的，第一开关管为MOS或者三极管；示例性的，第一开关管为MOS管，其中，MOS管的栅极接时钟单元101，MOS管的第一导通极接供电电源V2，MOS管的第二导通极接所述运算放大单元104的电源端，当时钟单元101将时钟信号输出至MOS管的栅极时，通过时钟信号能够控制MOS管导通或者关断，因此本实施例通过MOS管即可生成电源驱动信号，极大地简化了第一导电单元102的电路结构。
作为一种可选的实施方式，其中，第一导电单元102包括多个级联的开关管；在所述多个级联的开关管中，前一个开关的第二导通极接后一个开关管的第一导通极，第一个开关管的第一导通极接供电电源V2，最后一个开关管的第二导通极接运算放大单元104的电源端，每一个开关管的控制极接时钟单元101。
因此在本实施例中，第一导电单元102利用多个开关管来实现电路的通断控制功能， 稳定性更强，避免了外界噪声对于第一导电单元102工作状态的干扰。
作为一种可选的实施方式，图6出了本实施例提供的第二导电单元103电路结构，如图6所示，第二导电单元103包括第二开关管；其中，第二开关管的控制极接时钟单元101，第二开关管的第一导通极接显示面板的电源电压输出端V1，第二开关管的第二导通极为电源电压控制电路101的第一电压输出端OUT1。
在本实施例中，当显示面板的Vcom电压未被拉扯时，时钟单元101将时钟信号输出至第二开关管的控制极，通过时钟信号使第二开关管导通，第二开关管的第一导通极和第二导通极之间相当于“短路”，显示面板的电源电压输出端直接将Vcom电压通过第二开关管的第一导通极、第二开关管的第二导通极并输出，此时运算放大单元104的第一输入端无法接入Vcom电压，运算放大单元104处于工作停止状态，电源电压控制电路10并未对显示面板的Vcom电压实现放大补偿作用，通过电源电压控制电路10的第一电压输出端OUT1能够直接输出Vcom电压，则显示面板Vcom电压不需要经过补偿放大也可使显示面板中的视频保持正常；从而本实施例通过第二开关管可提高电源电压控制电路10的控制效率，保障了显示面板中视频/图像的清晰度。
作为一种可选的实施方式，第二开关管为MOS管和三极管；示例性的，第二开关管为MOS管，则MOS管的栅极接时钟单元101，MOS管的第一导通极接显示面板的电源电压输出端V1，MOS管的第二导通极为电源电压控制电路10的第一电压输出端OUT1；当时钟单元101将时钟信号输出至MOS管的栅极时，通过时钟信号是MOS管导通，进而显示面板的电源电压输出端V1可直接通过MOS管输出Vcom电压，既简化了电源电压控制电路10的电路结构，也有利于提高电源电压控制电路10的控制效率。
作为一种可选的实施方式，其中，第二导电单元103包括多个级联的开关管；在多个级联的开关管中，前一个开关的第二导通极接后一个开关管的第一导通极，第一个开关管的第一导通极接显示面板的电源电压输出端V1，最后一个开关管的第二导通极为电源电压控制电路10的第一电压输出端OUT1，每一个开关管的控制极接时钟单元101。
因此，本实施例通过多个级联的开关管提高了第二导电单元103的工作稳定性，以使电源电压控制电路10能够处于最佳的工作状态，显示面板的Vcom电压能够及时地被放大并输出。
因此结合上述实施例，在电源电压控制电路10中，第一导电单元102和第二导电单元103通过开关管即可实现自身的导通或者关断，电路的兼容性极强；并且第一导电单元102和第二导电单元103具有完全相反的导通极性，若第一导电单元102导通则第二导电单元103关断；反之若第一导电单元102关断则第二导电单元103导通；因此通过第一导 电单元102和第二导电单元103之间的导通和关断即可对Vcom电压实现放大功能，操作简便，极大地提高了本实施例中电源电压控制电路10对于显示面板的Vcom电压的补偿能力。
作为一种可选的实施方式，图7示出了本实施例提供的运算放大单元104的电路结构，如图7所示，运算放大单元104包括：运算放大器；其中，运算放大器的第一输入端接显示面板的电源电压输出端V1，运算放大器的第二输入端接入基准电压信号Vref，运算放大器的电源端接第一导电单元102的第二导通端，运算放大器的输出端为电源电压控制电路10的第二电压输出端OUT2。
可选的，运算放大器的第一输入端既可以为运算放大器的正向输入端也可以为运算放大器的反向输入端；示例性的，若运算放大器的第一输入端为正向输入端，则运算放大器的第二输入端为反向输入端。
在本实施例中，由于运算放大器的电源端接第一导电单元102的第二导通端，运算放大器的接地端接地GND，通过电源驱动信号即可控制运算放大器的工作状态，只有当第一导电单元102将电源驱动信号输出至运算放大器时，通过该电源驱动信号才能驱动运算放大器处于正常的工作状态；若第一导电单元102并未将电源驱动信号输出至运算放大器，则运算放大器处于工作停止状态；因此当显示面板的Vcom电压被拉扯时，通过运算放大器的第一输入端和第二输入端分别接入基准电压信号Vref和Vcom电压；根据基准电压信号Vref和Vcom电压之间的差异，运算放大器对Vcom电压进行差分放大并输出，因此电源电压控制电路10的第二电压输出端OUT2即可将放大的Vcom电压输出至显示面板，通过该放大后的Vcom电压向显示面板提供额定的供电电源，以保障显示面板能够显示正常、清晰的视频/图像；因此本实施例利用运算放大器对显示面板的Vcom电压进行精确放大并输出，进而运算放大器所输出放大后的Vcom电压能够符合显示面板的额定输入电源要求，通过运算放大器能够有效地保障显示面板的Vcom电压维持在正常的幅值范围之内，提高了电源电压控制电路10的可操控性，避免了显示面板由于Vcom电压被拉扯而导致画面显示异常的问题，从而本实施例中的电源电压控制电路10具有极高的实用价值。
作为一种可选的实施方式，所述运算放大单元104包括：比较器；其中，比较器的第一输入端接显示面板的电源电压输出端V1，比较器的第二输入端接入基准电压信号Vref，比较器的电源端接第一导电单元102的第二导通端，比较器的输出端为电源电压控制电路10的第二电压输出端OUT2。
可选的，比较器的第一输入端既可以为正向输入端也可以为反向输入端，示例性的，比较器的第一输入端为正向输入端，比较器的第二输入端为反向输入端；通过电源驱动信 号能够控制比较器的电压放大作用，只有比较器的电源端接入电源驱动信号时，通过电源驱动信号才能驱动比较器实现电压比较放大作用；当比较器的第一输入端和第二输入端接入基准电压信号和Vcom电压时，通过比较器能够对显示面板的Vcom电压进行放大并输出，进而通过比较器的输出端能够将放大后的Vcom电压输出至显示面板，以使显示面板能够显示正常、稳定的图像/视频，给用户带来良好的视觉体验；从而本实施例利用比较器保障了显示面板的Vcom电压始终能够维持在正常的范围，电路的结构简单，兼容性极强，有效地提高了电源电压控制电路10的应用范围。
作为一种可选的实施方式，图8示出了本实施例提供的运算放大单元104的另一种电路结构，如图8所示，运算放大单元104包括：第三电阻R3、第四电阻R4、第五电阻R5、第一三极管Q1以及第二三极管Q2。
第三电阻R3的第一端和第四电阻R4的第一端共接形成运算放大单元104的电源端，第三电阻R3的第二端接第一三极管Q1的集电极，第四电阻R4的第二端接第二三极管Q2的集电极，第一三极管Q1的发射极和第二三极管Q2的发射极共接于第五电阻R5的第一端，第五电阻R5的第二端接地GND；第一三极管Q1的基极为运算放大单元104的第一输入端，第二三极管Q2的基极为运算放大单元104的第二输入端，第四电阻R4的第二端和第二三极管Q2的集电极共接形成运算放大单元104的输出端。
在本实施例中，当第一三极管Q1的基极接入显示面板的Vcom电压，运第二三极管Q2的基极接入基准电压信号Vref，通过第一三极管Q1和第二三极管Q2能够对Vcom电压和基准电压信号Vref进行差分放大，从而运算放大单元104的输出端能够输出差分放大后的Vcom电压；因此本实施例中运算放大单元104通过较为简化的电路结构实现Vcom电压的精准放大功能，实用价值极高。
作为一种可选的实施方式，图9示出了本实施例提供的时钟单元101的模块结构，如图9所示，时钟单元101包括：振荡电路701和时钟芯片702。
在本实施例中，振荡电路701，生成振荡信号。
在本实施例中，通过振荡电路701能够根据显示面板中Vcom电压幅值生成相应的振荡信号，其中，通过振荡信号能够向时钟芯片702提供振荡频率，当显示面板的Vcom电压幅值发生改变时，则振荡信号具有不同的振荡频率，进而通过振荡信号即可调整时钟单元101的工作状态，以使电源电压控制电路10能够对显示面板的Vcom电压实现最佳的补偿效果，提高电源电压控制电路10的可操控性。
作为一种可选的实施方式，图10示出了本实施例提供的振荡电路701的电路结构，如图10所示，振荡电路701包括：第一电容C1、第二电容C2以及第一晶振Y1；其中第 一电容C1的第一端和第二电容C2的第一端共接于地GND，第一电容C1的第二端和第一晶振Y1的第一端共接形成振荡电路701的第一振荡信号输出端，第二电容C2的第二端和第一晶振Y1的第二端共接形成振荡电路701的第二振荡信号输出端，其中所述振荡电路701的第一振荡信号输出端和所述振荡电路701的第二振荡信号输出端接时钟芯片701；当第一晶振Y1生成具有不同振荡频率的振荡信号时，通过振荡电路701的第一振荡信号输出端和第二振荡信号输出端将振荡信号输出至时钟芯片702，通过振荡信号驱动时钟单元701能够生成具有不同电平状态的时钟信号；从而本实施例中的振荡电路701通过较为简化的电路结构能够生成相应的时钟信号，以驱动电源电压控制电路10实现相应的Vcom电压补偿功能，使显示面板能够显示正常、清晰的图像/视频。
在本实施例中，时钟芯片702，所述时钟芯片702的振荡信号输入输出管脚接振荡电路701，时钟芯片702生成时钟信号。
作为一种可选的实施方式，时钟芯片702的型号为：DS1302或者SD2201；本实施例可采用各种型号的时钟芯片702应用在时钟单元101，以使时钟单元101生成相应的时钟信号，本实施例中的时钟芯片能够实现较为复杂的信号转换功能，兼容性极强。
在本实施例中，当振荡电路701将振荡信号输出至时钟芯片702时，由于振荡信号具有不同的振荡频率，通过该振荡信号能够驱动时钟芯片702处于不同的工作状态；示例性的，当显示面板中的Vcom电压被拉扯时，振荡电路701生成振荡信号，该振荡信号向时钟芯片702提供相应的振荡频率，使得时钟芯片702生成具有特定电平状态的时钟信号，通过该时钟信号可驱动电源电压控制电路10对显示面板的Vcom电压进行放大并输出，以保障显示面板的Vcom电压能够处于额定的幅值范围；因此本实施例通过振荡电路701能够快速的生成时钟信号，避免了显示面板中扫描线和数据线突然关闭时显示面板的Vcom电压被长期拉低的问题。
根据图9所示出的时钟单元101的模块结构，时钟单元101通过振荡电路701和时钟芯片702生成相应的时钟信号，电路结构简单，并且本领域技术人员可根据实际需要选择时钟芯片702的具体型号，电路结构具有较强的灵活性；从而通过本实施例中的时钟单元101可保障：电源电压控制电路10具有相应的电压补偿功能，提高了显示面板中视频/图像显示的清晰度和稳定性。
作为一种可选的实施方式，图11示出了本实施例提供的显示面板的电源电压控制电路10的另一种模块结构，相比于图1中电源电压控制电路10的模块结构，图11中的显示面板的电源电压控制电路10还包括稳压单元100。
稳压单元100，稳压单元100接运算放大单元104的输出端，稳压单元100对放大后 的显示面板的电源电压进行稳压处理。
作为一种可选的实施方式，图12示出了本实施例提供的稳压单元100的具体电路结构，如图12所示，其中，稳压单元100包括：稳压芯片U1、第二晶振Y2、第三晶振Y3、第一稳压二极管YD1以及第二稳压二极管YD2；其中，稳压芯片U1的电源输入管脚Vin和第二晶振Y1的第一端共接形成稳压单元100的电压输入端，第三晶振Y3的第一端、第二稳压二极管YD2的阴极以及稳压芯片U1的电源输出管脚Vout共接形成稳压单元100的电压输出端，第二晶振Y2的第二端、第一稳压二极管VD1的阴极、第二稳压二极管VD2的阳极以及第三晶振Y3的第二端共接于稳压芯片U1的接地管脚，第一稳压二极管VD1的阳极接地GND；稳压单元100的电压输入端接运算放大单元104的输出端。
作为一种可选的实施方式，上述稳压芯片U1为型号为：LM2940CT系列芯片或者LM2930T系列芯片；因此本实施例中的稳压单元100利用稳压芯片U1来实现对于显示面板的Vcom电压稳压功能，提高了显示面板的运行安全，显示面板能够显示更加完整、清晰的图像/视频。
作为一种可选的实施方式，本实施例提供了一种显示面板，所述显示面板包括：至少一条扫描线、至少一条数据线、栅极驱动器、源极驱动器以及显示面板的电源电压控制电路。
至少一条扫描线，在垂直方向呈阵列排布。
至少一条数据线，在水平方向呈阵列排布。
栅极驱动器，栅极驱动器接扫描线，栅极驱动器生成扫描信号。
源极驱动器，源极驱动器接数据线，源极驱动器生成数据信号；以及
显示面板的电源电压控制电路，所述电源电压控制电路与扫描线以及数据线连接，其中，所述电源电压控制电路包括：时钟单元、第一导电单元、第二导电单元以及运算放大单元。
时钟单元，生成时钟信号。
第一导电单元，所述第一导电单元的第一导通端接供电电源，第一导电单元的控制端接时钟单元，第一导电单元根据时钟信号导通或者关断，并且第一导电单元导通时生成电源驱动信号。
第二导电单元，第二导电单元的控制端接时钟单元，第二导电单元的第一导通端接显示面板的电源电压输出端，第二导电单元的第二导通端为电源电压控制电路的第一电压输出端，第二导电单元根据时钟信号导通或者关断。
运算放大单元，运算放大单元的第一输入端接显示面板的电源电压输出端，运算放大 单元的第二输入端接入基准电压信号，运算放大单元的电源端接第一导电单元的第二导通端，运算放大单元根据电源驱动信号对显示面板的电源电压进行放大并输出。
需要说明的是，在本实施例中栅极驱动器和源极驱动器可采用示例性技术中的具体电路结构来实现；而本实施例中的显示面板的电源电压控制电路即为图1中的显示面板的电源电压控制电路10。
作为一种可选的实施方式，所述电源电压控制电路还包括：
基准电压生成单元，连接在运算放大单元的第二输入端与地之间，基准电压生成单元生成基准电压信号。
作为一种可选的实施方式，所述电源电压控制电路还包括：
稳压单元，所述稳压单元接运算放大单元的输出端，稳压单元对放大后的显示面板的电源电压进行稳压处理。
由于本实施例显示面板中各个电路模块与图1至图12中的电源电压控制电路10相对应，因此关于本实施例中显示面板的具体实施方式参照图1至图12的实施例，此处不再赘述。
图13示出了本实施例提供的显示装置130的模块结构，如图13所示，显示装置130包括显示面板901，本实施例中显示面板901内部电路结构及其工作原理可参照图1至图12的实施例，此处将不再赘述；；参照图1至图12的实施例，若显示面板901的Vcom电压被拉扯时，通过电源电压控制电路能够对Vcom电压进行放大并输出，显示面板901根据放大后的Vcom电压显示高清、正常的画面，给用户带来良好的视觉体验；并且本实施例中的电源电压控制电路具有较为简化的电路结构，并且兼容性极强，通过该电源电压控制电路能够使放大后的Vcom电压符合显示面板901的额定输入电源要求，显示装置130根据用户的实际需求显示高清、动态的视频，进而该显示装置130能够适用于各个工业领域中，实用价值较高；有效地解决了示例性技术中显示面板的Vcom电压被拉扯，导致显示面板中画面显示效果异常，用户的视觉体验不佳的问题。
作为一种可选的实施方式，上述显示装置130为：LCD(Liquid Crystal Display，液晶显示器)、OLED(Organic Electroluminesence Display，有机电激光显示器)或者QLED(Quantum Dot Light Emitting Diodes，量子点发光二极管)。
结合上文内容，本申请中的电源电压控制电路具有简化的电路结构，兼容性极强，能够及时提高显示面板的Vcom电压，极大地改善了显示面板的画面显示质量，给用户带来良好的视觉体验；进而本申请中的电源电压控制电路对于促进显示技术的发展具有极为重要的积极意义。

Claims (20)

  1. 一种显示面板的电源电压控制电路，包括：
    时钟单元，生成时钟信号；
    第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
    第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
    运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电源电压进行放大并输出。
  2. 根据权利要求1所述的显示面板的电源电压控制电路，在所述时钟信号为第一电平状态时，所述第一导电单元导通，并且所述第二导电单元关断；
    在所述时钟信号为第二电平状态时，所述第一导电单元关断，并且所述第二导电单元导通。
  3. 根据权利要求1所述的显示面板的电源电压控制电路，还包括：
    基准电压生成单元，连接在所述运算放大单元的第二输入端与地之间，所述基准电压生成单元生成所述基准电压信号。
  4. 根据权利要求3所述的显示面板的电源电压控制电路，其中，所述基准电压生成单元：第一电阻和第二电阻；
    其中，所述第一电阻的第一端和所述第二电阻的第二端共接于所述运算放大单元的第二输入端，所述第一电阻的第二端接地，所述第二电阻的第二端接所述运算放大单元的输出端。
  5. 根据权利要求3所述的显示面板的电源电压控制电路，其中，所述基准电压生成单元包括：基准电压源、第六电阻、第七电阻以及第三电容；
    所述第六电阻的第一端、所述第七电阻的第一端以及所述第三电容的第一端共接所述运算放大单元的第二输入端，所述第七电阻的第二端接地，所述第三电容的第二端接地，所述基准电压源的正极接所述第六电阻的第二端，所述基准电压源的负极接地。
  6. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述第一导电单元包括第一开关管；其中，所述第一开关管的控制极接所述时钟单元，所述第一开关管的第一导通极接所述供电电源，所述第一开关管的第二导通极接所述运算放大单元的电源端。
  7. 根据权利要求1所述的显示面板，其中，所述第一导电单元包括多个级联的开关管；
    在所述多个级联的开关管中，前一个开关的第二导通极接后一个开关管的第一导通极，第一个开关管的第一导通极接所述供电电源，最后一个开关管的第二导通极接所述运算放大单元的电源端，每一个开关管的控制极接所述时钟单元。
  8. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述第二导电单元包括第二开关管；
    其中，所述第二开关管的控制极接所述时钟单元，所述第二开关管的第一导通极接所述显示面板的电源电压输出端，所述第二开关管的第二导通极为所 述电源电压控制电路的第一电压输出端。
  9. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述第二导电单元包括多个级联的开关管；
    在所述多个级联的开关管中，前一个开关的第二导通极接后一个开关管的第一导通极，第一个开关管的第一导通极接所述显示面板的电源电压输出端，最后一个开关管的第二导通极为所述电源电压控制电路的第一电压输出端，每一个开关管的控制极接所述时钟单元。
  10. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述运算放大单元包括：运算放大器；
    其中，所述运算放大器的第一输入端接所述显示面板的电源电压输出端，所述运算放大器的第二输入端接入所述基准电压信号，所述运算放大器的电源端接所述第一导电单元的第二导通端，所述运算放大器的输出端为所述电源电压控制电路的第二电压输出端。
  11. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述运算放大单元包括：比较器；
    其中，所述比较器的第一输入端接所述显示面板的电源电压输出端，所述比较器的第二输入端接入所述基准电压信号，所述比较器的电源端接所述第一导电单元的第二导通端，所述比较器的输出端为所述电源电压控制电路的第二电压输出端。
  12. 根据权利要求1所述的显示面板的电源电压控制电路，其中，运算放大单元包括：第三电阻、第四电阻、第五电阻、第一三极管以及第二三极管；
    所述第三电阻的第一端和所述第四电阻的第一端共接形成所述运算放大单元的电源端，所述第三电阻的第二端接所述第一三极管的集电极，所述第四 电阻的第二端接所述第二三极管的集电极，所述第一三极管的发射极和所述第二三极管的发射极共接于所述第五电阻的第一端，所述第五电阻的第二端接地；
    所述第一三极管的基极为所述运算放大单元的第一输入端，所述第二三极管的基极为所述运算放大单元的第二输入端，所述第四电阻的第二端和所述第二三极管的集电极共接形成所述运算放大单元的输出端。
  13. 根据权利要求1所述的显示面板的电源电压控制电路，其中，所述时钟单元包括：
    振荡电路，生成振荡信号；
    时钟芯片，所述时钟芯片的振荡信号输入输出管脚接所述振荡电路，所述时钟芯片生成所述时钟信号。
  14. 根据权利要求13所述的显示面板的电源电压控制电路，其中，所述振荡电路包括：第一电容、第二电容以及第一晶振；
    其中，所述第一电容的第一端和所述第二电容的第一端共接于地，所述第一电容的第二端和所述第一晶振的第一端共接形成所述振荡电路的第一振荡信号输出端，所述第二电容的第二端和所述第一晶振的第二端共接形成所述振荡电路的第二振荡信号输出端，其中所述振荡电路的第一振荡信号输出端和所述振荡电路的第二振荡信号输出端接所述时钟芯片。
  15. 根据权利要求1所述的显示面板的电源电压控制电路，所述电源电压控制电路还包括：
    稳压单元，所述稳压单元接所述运算放大单元的输出端，所述稳压单元对放大后的显示面板的电源电压进行稳压处理。
  16. 根据权利要求15所述的显示面板的电源电压控制电路，其中，所述 稳压单元包括：稳压芯片、第二晶振、第三晶振、第一稳压二极管以及第二稳压二极管；
    所述稳压芯片的电源输入管脚和所述第二晶振的第一端共接形成所述稳压单元的电压输入端，所述第三晶振的第一端、所述第二稳压二极管的阴极以及所述稳压芯片的电源输出管脚共接形成所述稳压单元的电压输出端，所述第二晶振的第二端、所述第一稳压二极管的阴极、所述第二稳压二极管的阳极以及所述第三晶振的第二端共接于所述稳压芯片的接地管脚，所述第一稳压二极管的阳极接地；
    所述稳压单元的电压输入端接所述运算放大单元的输出端。
  17. 一种显示面板，包括：
    至少一条扫描线，在垂直方向呈阵列排布；
    至少一条数据线，在水平方向呈阵列排布；
    栅极驱动器，所述栅极驱动器接所述扫描线，所述栅极驱动器生成扫描信号；
    源极驱动器，所述源极驱动器接所述数据线，所述源极驱动器生成数据信号；以及
    显示面板的电源电压控制电路，所述电源电压控制电路与所述扫描线以及所述数据线连接，其中，所述电源电压控制电路包括：
    时钟单元，生成时钟信号；
    第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
    第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导 电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
    运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电源电压进行放大并输出。
  18. 根据权利要求17所述的显示面板，其中，所述电源电压控制电路还包括：
    基准电压生成单元，连接在所述运算放大单元的第二输入端与地之间，所述基准电压生成单元生成所述基准电压信号。
  19. 根据权利要求17所述的显示面板，其中，所述电源电压控制电路还包括：
    稳压单元，所述稳压单元接所述运算放大单元的输出端，所述稳压单元对放大后的显示面板的电源电压进行稳压处理。
  20. 一种显示装置，包括显示面板；
    其中，所述显示面板包括：
    至少一条扫描线；
    至少一条数据线；
    栅极驱动器，所述栅极驱动器接所述扫描线，所述栅极驱动器生成扫描信号；
    源极驱动器，所述源极驱动器接所述数据线，所述源极驱动器生成数据信号；以及
    显示面板的电源电压控制电路，所述电源电压控制电路与所述扫描线以及所述数据线连接，其中，所述电源电压控制电路包括：
    时钟单元，生成时钟信号；
    第一导电单元，所述第一导电单元的第一导通端接供电电源，所述第一导电单元的控制端接所述时钟单元，所述第一导电单元根据所述时钟信号导通或者关断，并且所述第一导电单元导通时生成电源驱动信号；
    第二导电单元，所述第二导电单元的控制端接所述时钟单元，所述第二导电单元的第一导通端接显示面板的电源电压输出端，所述第二导电单元的第二导通端为所述电源电压控制电路的第一电压输出端，所述第二导电单元根据所述时钟信号导通或者关断；以及
    运算放大单元，所述运算放大单元的第一输入端接所述显示面板的电源电压输出端，所述运算放大单元的第二输入端接入基准电压信号，所述运算放大单元的电源端接所述第一导电单元的第二导通端，所述运算放大单元根据所述电源驱动信号对所述显示面板的电源电压进行放大并输出。
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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12313912B2 (en) * 2022-08-23 2025-05-27 Tectus Corporation Electronic contact lens data receiver circuit
KR20250099422A (ko) * 2023-10-08 2025-07-01 우한 차이나 스타 옵토일렉트로닉스 세미컨덕터 디스플레이 테크놀로지 컴퍼니 리미티드 게이트 구동 회로 및 이를 포함하는 디스플레이 패널

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008167014A (ja) * 2006-12-27 2008-07-17 Epson Imaging Devices Corp 出力回路及び表示装置
CN101256756A (zh) * 2004-10-06 2008-09-03 精工爱普生株式会社 电源电路、显示驱动器、光电装置及电子设备
CN101572068A (zh) * 2008-04-29 2009-11-04 三星电子株式会社 公共电压发生器、包括该发生器的显示设备及其生成方法
CN101764626A (zh) * 2008-12-01 2010-06-30 三星电子株式会社 发射和接收信号的系统和方法
CN102479497A (zh) * 2010-11-29 2012-05-30 奥博特瑞克斯株式会社 液晶显示面板的驱动装置
CN104077993A (zh) * 2013-03-29 2014-10-01 索尼公司 显示装置、cmos运算放大器和显示装置的驱动方法
CN104376819A (zh) * 2013-08-15 2015-02-25 友达光电股份有限公司 一种液晶显示装置驱动系统及其驱动方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007256344A (ja) * 2006-03-20 2007-10-04 Rohm Co Ltd 電源回路、ｌｃｄドライバｉｃ、ｌｃｄドライバ回路、液晶表示装置
KR102334634B1 (ko) * 2008-11-28 2021-12-06 가부시키가이샤 한도오따이 에네루기 켄큐쇼 반도체 장치, 표시 장치 및 표시 장치를 포함하는 전자 장치
TWI664619B (zh) * 2009-01-16 2019-07-01 日商半導體能源研究所股份有限公司 液晶顯示裝置及其電子裝置
JP6042091B2 (ja) * 2011-05-13 2016-12-14 ローム株式会社 スイッチングレギュレータの制御回路、スイッチングレギュレータおよび電子機器、スイッチング電源装置、テレビ
KR102219480B1 (ko) * 2014-08-06 2021-02-25 삼성디스플레이 주식회사 공통전압 왜곡 검출 회로, 이를 갖는 액정표시장치 및 이의 구동 방법
JP6668799B2 (ja) * 2016-02-12 2020-03-18 セイコーエプソン株式会社 電子機器
US10404086B2 (en) * 2016-07-06 2019-09-03 Google Llc Battery fast-charging system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101256756A (zh) * 2004-10-06 2008-09-03 精工爱普生株式会社 电源电路、显示驱动器、光电装置及电子设备
JP2008167014A (ja) * 2006-12-27 2008-07-17 Epson Imaging Devices Corp 出力回路及び表示装置
CN101572068A (zh) * 2008-04-29 2009-11-04 三星电子株式会社 公共电压发生器、包括该发生器的显示设备及其生成方法
CN101764626A (zh) * 2008-12-01 2010-06-30 三星电子株式会社 发射和接收信号的系统和方法
CN102479497A (zh) * 2010-11-29 2012-05-30 奥博特瑞克斯株式会社 液晶显示面板的驱动装置
CN104077993A (zh) * 2013-03-29 2014-10-01 索尼公司 显示装置、cmos运算放大器和显示装置的驱动方法
CN104376819A (zh) * 2013-08-15 2015-02-25 友达光电股份有限公司 一种液晶显示装置驱动系统及其驱动方法

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