WO2021164650A1 - 显示面板的驱动方法、其驱动电路及显示装置 - Google Patents
显示面板的驱动方法、其驱动电路及显示装置 Download PDFInfo
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- WO2021164650A1 WO2021164650A1 PCT/CN2021/076246 CN2021076246W WO2021164650A1 WO 2021164650 A1 WO2021164650 A1 WO 2021164650A1 CN 2021076246 W CN2021076246 W CN 2021076246W WO 2021164650 A1 WO2021164650 A1 WO 2021164650A1
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000012545 processing Methods 0.000 claims description 26
- 238000001514 detection method Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Definitions
- the present disclosure relates to the field of display technology, in particular to a driving method of a display panel, its driving circuit and a display device.
- an external voltage source can be used to provide a reference voltage for power supply, and the reference voltage is converted by a driving circuit to obtain a driving signal required for driving the display panel.
- the LCD panel displays large power consumption screens, due to insufficient loading capacity, the LCD panel will have a black screen or abnormal picture.
- the embodiment of the present disclosure provides a driving method of a display panel, including:
- the first reference voltage provided by the external voltage source is amplified into a second reference voltage, and the second reference voltage is provided to the touch screen of the display panel.
- the first reference voltage is provided to the touch and display integrated circuit and the power management circuit of the display panel.
- the data parameters corresponding to the high power consumption display screen set for the display panel and the data of the to-be-displayed screen are Signal to determine whether the picture to be displayed belongs to the high power consumption display picture, which specifically includes:
- the data of the display screen to be displayed according to the data parameters corresponding to the high power consumption display screen set for the display panel Signal to determine whether the picture to be displayed belongs to the high power consumption display picture and further includes:
- the data signal of the picture to be displayed does not include the data parameter corresponding to the high power consumption display picture, or when it is determined that the data signal of the picture to be displayed corresponds to the data parameter of the high power consumption display picture.
- the proportion is less than the preset value, it is determined that the picture to be displayed belongs to the low-power display picture.
- the preset value is greater than 50%.
- the method further includes:
- the power management circuit processes the received first reference voltage or the second reference voltage, and provides the processed voltages to the touch and display integrated circuit and the gate drive circuit, respectively.
- the power management circuit processes the received first reference voltage or the second reference voltage, and processes The latter voltages are respectively provided to the touch and display integrated circuit and the gate drive circuit, which specifically include:
- the power management circuit obtains the corresponding display panel gate on-state voltage, display panel gate off-state voltage, display panel source positive analog voltage, and The display panel source negative analog voltage, and the display panel gate on-state voltage and the display panel gate off-state voltage are provided to the gate driving circuit, and the display panel source positive analog voltage and the display The analog voltage of the negative electrode of the panel source is provided to the touch and display integrated circuit.
- the present disclosure implements and provides a drive circuit for a display panel, including: a voltage processing circuit, an image detection circuit, a power management circuit, a touch and display integrated circuit, and a gate drive circuit;
- the picture detection circuit is configured to obtain the data signal of the picture to be displayed, and determine the data signal of the picture to be displayed according to the data parameter corresponding to the high power consumption display picture set for the display panel and the data signal of the picture to be displayed Whether the screen belongs to the high-power display screen, when it is determined that the to-be-displayed screen belongs to the high-power display screen, a first control signal is provided to the voltage processing circuit, and when it is determined that the to-be-displayed screen belongs to the low-power display When the display screen is consumed, providing a second control signal to the voltage processing circuit;
- the voltage processing circuit is configured to receive a first reference voltage provided by an external voltage source, and upon receiving the first control signal, convert the first reference voltage into a second reference voltage, and convert the second reference voltage
- the reference voltage is provided to the power management circuit and the touch and display integrated circuit, and when the second control signal is received, the first reference voltage is provided to the power management circuit and the touch and display integrated circuit. Display integrated circuit; wherein, the second reference voltage is greater than the first reference voltage;
- the power management circuit is configured to receive the first reference voltage or the second reference voltage provided by the voltage processing circuit, and after processing the first reference voltage or the second reference voltage, The subsequent voltages are respectively provided to the touch and display integrated circuit and the gate driving circuit.
- the picture detection circuit includes: a preset picture detection sub-circuit and a display picture determination sub-circuit;
- the preset picture detection sub-circuit is configured to determine whether the data signal of the picture to be displayed includes the high power consumption according to the data parameter corresponding to the high power consumption display picture and the data signal of the picture to be displayed Display the data parameters corresponding to the screen;
- the display picture determining sub-circuit is configured to determine the high power consumption display in the data signal of the picture to be displayed when it is determined that the data signal of the picture to be displayed includes the data parameter corresponding to the high power consumption display picture. Whether the proportion of the data parameter corresponding to the screen is greater than the preset value, and when the proportion is greater than the preset value, it is determined that the to-be-displayed screen belongs to the high-power display screen;
- the data signal of the picture to be displayed does not include the data parameter corresponding to the high power consumption display picture, or when it is determined that the data signal of the picture to be displayed corresponds to the data parameter of the high power consumption display picture.
- the proportion is less than the preset value, it is determined that the picture to be displayed belongs to the low-power display picture.
- the preset value is greater than 50%.
- the voltage processing circuit includes: a first switch control sub-circuit, a second switch control sub-circuit, and an amplifying sub-circuit;
- the input terminal of the first switch control sub-circuit is electrically connected to the external voltage source, and the output terminal of the first switch control sub-circuit is electrically connected to the power management circuit and the touch and display integrated circuit, respectively;
- the first switch control sub-circuit is configured to be turned off under the control of the first control signal, and turned on under the control of the second control signal;
- the input end of the second switch control sub-circuit is electrically connected to the external voltage source, the output end of the second switch control sub-circuit is electrically connected to the input end of the amplifying sub-circuit, and the output of the amplifying sub-circuit is Terminals are respectively electrically connected to the power management circuit and the touch and display integrated circuit;
- the second switch control sub-circuit is configured to be turned on under the control of the first control signal, and turned off under the control of the second control signal;
- the amplifying sub-circuit is configured to receive the first reference voltage when the second switch control sub-circuit is turned on, perform amplifying processing on the first reference voltage to obtain a second reference voltage, and convert the second reference voltage to Two reference voltages are respectively provided to the power management circuit and the touch and display integrated circuit.
- the power management circuit includes: a first voltage conversion sub-circuit and a second voltage conversion sub-circuit;
- the first voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained analog voltage of the positive electrode of the display panel and the analog voltage of the negative electrode of the display panel to all The touch and display integrated circuit;
- the second voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained display panel gate on-state voltage and display panel gate off-state voltage to all The gate drive circuit.
- embodiments of the present disclosure also provide a display device, including the driving circuit provided in any one of the embodiments of the second aspect, and a liquid crystal display panel electrically connected to the driving circuit.
- FIG. 1 is a schematic structural diagram of a driving circuit of a display panel in the related art
- Figure 2 is a schematic diagram of data parameters when the display panel displays a low-power picture
- Figure 3 is a schematic diagram of data parameters when the display panel displays a large power consumption screen
- FIG. 4 is a schematic flowchart of a driving method of a display panel provided by an embodiment of the disclosure.
- FIG. 5 is a schematic diagram of a circuit structure of a driving circuit of a display panel provided by an embodiment of the disclosure.
- FIG. 6 is a schematic diagram of a circuit structure of a voltage processing circuit provided by an embodiment of the disclosure.
- the thickness of the display panel can be greatly reduced, and the touch and display driver integration (TDDI) The cost of the driving circuit can be saved.
- the power required by the drive circuit is generated internally by the master TDDI chip, such as VGH/VGL/AVDDP/AVDDN. Due to the limited power supply current generated by the chip, this method It is only suitable for small size and small resolution, that is, the use of panels with small maximum power consumption.
- the other is that the power required by the drive circuit is generated by an external power management circuit.
- the voltage and current generated by the power management circuit are larger than the current generated inside the TDDI chip. It is suitable for large-size and large-resolution LCD panels, such as 12.8FHD ( 1920*1080) TDDI display panel adopts this kind of power supply mode.
- the power supplied by the external voltage source to the display panel is usually only the power voltage VDD, so other voltages required by the driving circuit need to be converted by the VDD voltage, and this conversion process is completed inside the power management circuit.
- the drive circuit includes: a power management circuit, a touch and display integrated circuit, and a gate drive circuit.
- the external voltage source provides the reference signal VDD to the power management circuit and the touch and display integrated circuit, respectively.
- the circuit converts the VDD signal into the display panel gate on-state voltage VGH, the display panel gate off-state voltage VGL, the display panel source positive analog voltage AVDDP, and the display panel source negative analog voltage AVDDN, and provides VGH and VGL voltages
- the AVDDP and AVDDN voltages are provided to the touch and display integrated circuit to drive the display panel to work.
- the touch and display integrated circuits need to drive the display panel and the touch panel at the same time.
- both of the driving circuits are load circuits.
- This load circuit has a heavier load than an ordinary display panel, that is, theoretically, the load capacity of the power supply voltage should be stronger.
- the external voltage source requires a more complicated circuit to increase the load capacity of the power supply voltage, and the cost of the external voltage source will also increase, in actual use, the load capacity of the external voltage source is usually insufficient. Therefore, it often appears in the high power consumption screen, the display panel appears black or the picture is different.
- power consumption is related to the amplitude switching frequency and amplitude of the signal loaded on the data line.
- one data line controls a column of pixels, and the more pixels in the column of pixels with different gray levels, the greater the switching frequency of the amplitude of the data line.
- the above is only a 1 dot 255 screen as an example to illustrate the high power consumption screen.
- the determined high power consumption screens will also be different. Those skilled in the art can choose according to the display panel type. It is different to determine which screen belongs to the high power consumption screen. For example, it can be determined that the screens such as 1dot 255, 2Dot 255, V Line are high power consumption screens, and there is no specific limitation here.
- embodiments of the present disclosure provide a driving method of a display panel, a driving circuit thereof, and a display device.
- a driving method of a display panel a driving circuit thereof, and a display device.
- specific implementations of the display panel driving method, its driving circuit, and the display device provided by the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. And if there is no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.
- a method for driving a display panel provided by an embodiment of the present disclosure, as shown in FIG. 4, includes:
- Step S401 Obtain a data signal of a picture to be displayed; where the data signal includes grayscale data corresponding to each pixel, where the grayscale data includes the magnitude of the grayscale voltage corresponding to each pixel and the positive and negative polarity of the grayscale voltage.
- each frame of the display picture can be tested, or the test can be performed at intervals of preset frames, which can be set according to actual display requirements, which is not specifically limited here.
- Step S402 Determine whether the to-be-displayed screen belongs to the high-power-consumption display screen according to the data parameters corresponding to the high-power consumption display screen set for the display panel and the data signal of the to-be-displayed screen;
- the description is made by taking the data parameter corresponding to the preset high-power display screen including data corresponding to 1 dot 255 screen as an example.
- the polarity of the gray-scale voltage of two adjacent pixels driven by the same data line of 1 dot 255 screen is opposite, that is, one negative and one positive.
- the gray-scale voltage also changes directly from 0 (black pixel) to 255 (white pixel). ), or directly change from 255 (white pixel) to 0 (black pixel), that is, the voltage polarity change and the voltage magnitude change of the grayscale data are both the largest, resulting in a 1 dot 255 screen that is a high-power display screen.
- the data parameter corresponding to the high-power display screen mentioned in the present disclosure may include the threshold number of the change process from 0 to 255 or 255 to 0 loaded on the same data line, that is, if the data signal of the to-be-displayed screen includes more than N
- the above-mentioned change process is considered to be a high-power display screen. If the data signal of the to-be-displayed screen includes less than or equal to N of the above-mentioned change processes, the to-be-displayed screen is considered to be a low-power display screen.
- the value of N can be determined according to the display panel of the application, which is not specifically limited here.
- the data parameters corresponding to the high-power display screen are determined according to different types of liquid crystal display panels. There may be differences in the definition of the high-power display screen for different types of liquid crystal display panels.
- the type of the display panel is determined, and there is no specific limitation here.
- Step S403 When it is determined that the picture to be displayed belongs to a high-power display picture, the first reference voltage provided by the external voltage source is amplified into a second reference voltage, and the second reference voltage is provided to the touch and display integrated circuit of the display panel And power management circuit;
- Step S404 When it is determined that the picture to be displayed belongs to a low-power display picture, the first reference voltage is provided to the touch and display integrated circuit and the power management circuit of the display panel.
- the power management circuit is configured to convert the reference voltage signal it obtains into the display panel gate on-state voltage VGH and the display panel gate off-state voltage VGL required by the gate drive circuit of the display panel;
- the obtained reference voltage signal is converted into the display panel source positive analog voltage AVDDP and the display panel source negative analog voltage AVDDN required by the touch and display integrated circuit of the display panel.
- the external voltage source provides the first reference voltage VDD to the display panel.
- the power management circuit After the display panel receives the VDD voltage, the power management circuit generates the VGH/VGL/AVDDP/AVDDN voltage required by the display panel.
- the VDD voltage range is usually 3.3V ⁇ 0.3V. When displaying a low power consumption screen, the current is small, and the actual voltage to the input voltage terminal of the power management circuit is within this range, and other voltages generated are also within the voltage range required by the display panel, and the display screen is normal.
- the current is large, and the actual voltage to the input voltage terminal of the power management circuit may be less than 3V, that is, less than the minimum power supply voltage required by the power management circuit, then the power management circuit converted under this power supply voltage
- the voltage of VGH/VGL/AVDDP/AVDDN may also exceed the voltage range required by the corresponding circuit of the display panel, resulting in abnormal display, black screen or abnormal picture.
- the present disclosure determines whether to amplify the first reference voltage provided by the external voltage source to obtain the second reference voltage by determining whether the picture to be displayed belongs to the high-power display picture, and provide the second reference voltage to the touch and display integrated circuit of the display panel. And the power management circuit to drive each pixel to ensure the normal display of the high-power display screen. That is, the present disclosure determines the power consumption type of the picture to be displayed, and provides reference voltages of different voltage intensities according to the picture to be displayed with different power consumption, so as to ensure that display pictures with different power consumption can be displayed normally, thereby improving the display quality of the display panel.
- the display screen can specifically include:
- the data parameters corresponding to the high-power display screen and the data signal of the to-be-displayed screen determine whether the data signal of the to-be-displayed screen includes the data parameter corresponding to the high-power-consumption display screen;
- the proportion is greater than the preset value, it is determined that the picture to be displayed is a high-power display picture
- the driving method of the display panel provided by the embodiment of the present disclosure, it is possible to determine whether the data signal of the screen to be displayed includes the data parameter corresponding to the high-power display screen, and to determine the data parameter corresponding to the high-power display screen.
- the ratio of the data signal of the picture to be displayed is used to determine whether the picture to be displayed belongs to a high power consumption display picture, that is, whether the picture to be displayed belongs to a high power consumption display picture is determined by judging the overall power consumption of the picture to be displayed.
- the data signal of the screen to be displayed includes data parameters corresponding to the high-power display screen
- the data parameters corresponding to the high-power display screen account for a small proportion of the data signal of the screen to be displayed.
- the required power consumption is not large, therefore, the picture to be displayed cannot be determined to be a high-power display picture.
- the low-power consumption display screen is relative to the high-power consumption screen, and the low-power consumption screen includes not only the display screen with lower power consumption than the normal level, but also the display screen with normal power consumption. That is, the screen to be displayed is either a high-power display screen or a low-power display screen.
- the setting of the preset value can be set according to the actual display needs, and can be set Belonging to more than 50%.
- other proportions can also be used, which are not specifically limited here.
- the driving method of the display panel provided by the embodiment of the present disclosure, it may further include:
- the power management circuit processes the received first reference voltage or the second reference voltage, and provides the processed voltages to the touch and display integrated circuit and the gate drive circuit respectively.
- the main function of the power management circuit is to convert the voltage obtained by the power management circuit and provide it to the touch and display integrated circuit and the gate driving circuit to realize the display Normal drive of the panel.
- the VDD voltage can be converted to the VGH/VGL/AVDDP/AVDDN voltage, that is, the power management circuit obtains the corresponding on-state voltage of the display panel gate and the display panel gate according to the received first reference voltage and the second reference voltage.
- the off-state voltage, the analog voltage of the positive electrode of the display panel source and the negative analog voltage of the display panel source are provided, and the on-state voltage of the display panel grid and the off-state voltage of the display panel grid are provided to the gate drive circuit, and the positive electrode of the display panel
- the analog voltage and the analog voltage of the negative electrode of the source of the display panel are provided to the touch and display integrated circuit.
- the embodiments of the present disclosure also provide a driving circuit for a display panel, as shown in FIG. 5, including: a picture detection circuit 1, a voltage processing circuit 2, a power management circuit 3, a touch and display integrated circuit 4 and gate drive circuit 5;
- the picture detection circuit 1 is configured to obtain the data signal of the picture to be displayed, and determine whether the picture to be displayed belongs to the high power display according to the data parameters corresponding to the high power consumption display picture set for the display panel and the data signal of the picture to be displayed When it is determined that the picture to be displayed is a high-power display picture, the voltage processing circuit 2 is provided with a first control signal, and when it is determined that the picture to be displayed is a low-power display picture, the voltage processing circuit 2 is provided with a second control signal;
- the voltage processing circuit 2 is configured to receive a first reference voltage VDD provided by an external voltage source, and upon receiving the first control signal, convert the first reference voltage into a second reference voltage, and provide the second reference voltage to the power management
- the circuit 3 and the touch and display integrated circuit 4 provide a first reference voltage to the power management circuit 3 and the touch and display integrated circuit 4 when receiving the second control signal; wherein, the second reference voltage is greater than the first reference voltage Voltage;
- the power management circuit 3 is configured to receive the first reference voltage or the second reference voltage provided by the voltage processing circuit 2, and after the first reference voltage or the second reference voltage is processed, the processed voltage is provided to the touch and display respectively Integrated circuit 4 and gate drive circuit 5.
- the power consumption type of the picture to be displayed can be determined through the setting of the picture detection circuit, that is, whether the picture to be displayed belongs to the high power consumption display picture or belongs to A low-power display screen, when it belongs to a high-power display screen, provides a first control signal to the voltage processing circuit so that the voltage processing circuit will output the amplified second reference voltage; when it belongs to a low-power display screen, The second control signal is provided to the voltage processing circuit, and the first reference voltage is directly output, so as to meet the demand for the supply voltage when displaying display images with different power consumption.
- the picture detection circuit includes: a preset picture detection sub-circuit and a display picture determination sub-circuit;
- the preset picture detection sub-circuit is configured to determine whether the data signal of the picture to be displayed includes the data parameter corresponding to the picture to be displayed based on the data parameter corresponding to the high-power display picture and the data signal of the picture to be displayed;
- the display screen determining sub-circuit is configured to determine whether the data signal of the to-be-displayed screen contains the data parameter corresponding to the high-power display screen when it is determined that the data signal of the screen to be displayed includes the data parameter corresponding to the high-power display screen. Greater than the preset value, when the proportion is greater than the preset value, it is determined that the picture to be displayed is a high-power display picture;
- the preset value may be greater than 50%.
- the voltage processing circuit includes: a first switch control sub-circuit K1, a second switch control sub-circuit K3, and an amplifying sub-circuit 21 ;
- the input terminal of the first switch control sub-circuit K1 is electrically connected to an external voltage source, and the output terminal VDD_OUT of the first switch control sub-circuit K1 is electrically connected to the power management circuit 3 and the touch and display integrated circuit 4 respectively; the first switch control sub-circuit The circuit K1 is configured to be turned off under the control of the first control signal, and turned on under the control of the second control signal;
- the input terminal of the second switch control sub-circuit K2 is electrically connected to the external voltage source, the output terminal of the second switch control sub-circuit K2 is electrically connected to the input terminal of the amplifying sub-circuit 21, and the output terminal VDD_OUT of the amplifying sub-circuit 21 is respectively connected to the power management
- the circuit 3 and the touch and display integrated circuit 4 are electrically connected;
- the second switch control sub-circuit 2 is configured to be turned on under the control of the first control signal, and turned off under the control of the second control signal;
- the amplifying sub-circuit 21 is configured to receive the first reference voltage when the second switch control sub-circuit K2 is turned on, amplify the first reference voltage, and provide the amplified second reference voltages to the power management circuit 3 respectively And touch and display integrated circuit 4.
- the first reference voltage provided by the external voltage source is VDD
- K1 and K2 are analog switches, which are controlled by the image detection circuit.
- the initial values of K1 and K2 can be set as K1 on and K2 on, that is, the amplifying sub-circuit is initially not working.
- the picture detection circuit detects the high power consumption display picture
- the picture detection circuit controls K1 to close and K2 to open, and the voltage VDD is amplified.
- the magnification can be determined by debugging.
- the picture detection circuit continues to detect the picture once for N frames.
- K1 and K2 are turned on immediately, so that the amplifying sub-circuit stops working, and so on.
- the structure of the amplifying sub-circuit shown in FIG. 6 is only an exemplary description, and is not limited to this structure. Any other circuit structure capable of realizing the voltage amplifying function is within the protection scope of the present disclosure and will not be specifically described here. limited.
- the power management circuit includes: a first voltage conversion sub-circuit and a second voltage conversion sub-circuit;
- the first voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained analog voltage of the positive electrode of the display panel and the analog voltage of the negative electrode of the display panel to the touch and display integrated circuit;
- the second voltage conversion sub-circuit is configured to convert the first reference voltage or the second reference voltage, and provide the obtained display panel gate on-state voltage and display panel gate off-state voltage to the gate driving circuit.
- the driving circuit for the display panel provided by the embodiments of the present disclosure has all the advantages of the driving method for the display panel provided by the above-mentioned embodiments. Among them, the function of each sub-circuit and the beneficial effects produced by it have been implemented in the driving method. A detailed explanation is given, so I won’t repeat it here.
- embodiments of the present disclosure also provide a display device, which includes the drive circuit provided in any of the above-mentioned embodiments, and a liquid crystal display panel electrically connected to the drive circuit.
- the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and so on.
- a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and so on.
- Other indispensable components of the display device are understood by those of ordinary skill in the art, and will not be repeated here, nor should they be used as a limitation to the present disclosure.
- the implementation of the display device can be referred to the embodiment of the above-mentioned display panel, and the repetition will not be repeated.
- the embodiments of the present disclosure provide a driving method of a display panel, a driving circuit thereof, and a display device.
- the driving method obtains whether the picture to be displayed belongs to a high power consumption display picture; when it is determined that the picture to be displayed belongs to a high power consumption display picture
- the second reference voltage amplified by the first reference voltage provided by the external voltage source is provided to the touch and display integrated circuit and the power management circuit of the display panel, each pixel is driven to ensure the normal display of the high-power display screen ;
- the first reference voltage is directly provided to the touch and display integrated circuit and the power management circuit of the display panel to drive each pixel in the display panel to ensure low power consumption Normal display of power consumption screen.
- the present disclosure determines the power consumption type of the picture to be displayed, and provides reference voltages of different voltage intensities according to the picture to be displayed with different power consumption, so as to ensure that display pictures with different power consumption can be displayed normally, thereby improving the display quality of the display panel.
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Abstract
Description
Claims (12)
- 一种显示面板的驱动方法,其中,包括:获取待显示画面的数据信号;根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面是否属于所述大功耗显示画面;当确定所述待显示画面属于所述大功耗显示画面时,将外部电压源提供的第一参考电压放大成为第二参考电压,并将所述第二参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路;当确定所述待显示画面属于低功耗显示画面时,将所述第一参考电压提供给所述显示面板的触控与显示集成电路和电源管理电路。
- 如权利要求1所述的驱动方法,其中,所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面是否属于所述大功耗显示画面,具体包括:根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数;当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时,判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值;当所占比例比大于所述预设值时,确定所述待显示画面属于所述大功耗显示画面。
- 如权利要求2所述的驱动方法,其中,所述根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面是否属于所述大功耗显示画面,还包括:当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时,或者,当确定所述待显示画面的数据信号中所述大功耗显示画面 对应的数据参数所占比例小于预设值时,确定所述待显示画面属于所述低功耗显示画面。
- 如权利要求3所述的驱动方法,其中,所述预设值大于50%。
- 如权利要求1-4任一项所述的驱动方法,其中,所述方法还包括:所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进行处理,将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路。
- 如权利要求5所述的驱动方法,其中,所述电源管理电路对接收到的所述第一参考电压或所述第二参考电压进行处理,将处理后的电压分别提供给所述触控与显示集成电路和栅极驱动电路,具体包括:所述电源管理电路根据接收到的所述第一参考电压和所述第二参考电压,得到对应的显示面板栅极开态电压、显示面板栅极关态电压、显示面板源极正极模拟电压和显示面板源极负极模拟电压,并将所述显示面板栅极开态电压和所述显示面板栅极关态电压提供给栅极驱动电路,将所述显示面板源极正极模拟电压和所述显示面板源极负极模拟电压提供给所述触控与显示集成电路。
- 一种显示面板的驱动电路,其中,包括:电压处理电路、画面侦测电路、电源管理电路、触控与显示集成电路和栅极驱动电路;所述画面侦测电路被配置为获取待显示画面的数据信号,并根据针对所述显示面板设置的大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面是否属于所述大功耗显示画面,当确定所述待显示画面属于所述大功耗显示画面时,向所述电压处理电路提供第一控制信号,在确定所述待显示画面属于低功耗显示画面时,向所述电压处理电路提供第二控制信号;所述电压处理电路被配置为接收外部电压源提供的第一参考电压,在接收到所述第一控制信号时,将所述第一参考电压转换为第二参考电压,并将所述第二参考电压提供给所述电源管理电路和所述触控与显示集成电路,在 接收到所述第二控制信号时,将所述第一参考电压提供给所述电源管理电路和所述触控与显示集成电路;其中,所述第二参考电压大于所述第一参考电压;所述电源管理电路被配置为接收所述电压处理电路提供的所述第一参考电压或所述第二参考电压,将所述第一参考电压或所述第二参考电压进行处理后,将处理后的电压分别提供给所述触控与显示集成电路和所述栅极驱动电路。
- 如权利要求7所述的驱动电路,其中,所述画面侦测电路包括:预设画面侦测子电路和显示画面确定子电路;所述预设画面侦测子电路被配置为根据所述大功耗显示画面对应的数据参数和所述待显示画面的数据信号,确定所述待显示画面的数据信号是否包括所述大功耗显示画面对应的数据参数;所述显示画面确定子电路被配置为当确定所述待显示画面的数据信号包括所述大功耗显示画面对应的数据参数时,判断所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例是否大于预设值,当所占比例比大于所述预设值时,确定所述待显示画面属于所述大功耗显示画面;当确定所述待显示画面的数据信号不包括所述大功耗显示画面对应的数据参数时,或者,当确定所述待显示画面的数据信号中所述大功耗显示画面对应的数据参数所占比例小于预设值时,确定所述待显示画面属于所述低功耗显示画面。
- 如权利要求8所述的驱动电路,其中,所述预设值大于50%。
- 如权利要求7-9任一项所述的驱动电路,其中,所述电压处理电路包括:第一开关控制子电路、第二开关控制子电路和放大子电路;所述第一开关控制子电路的输入端与所述外部电压源电连接,所述第一开关控制子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接;所述第一开关控制子电路被配置为在所述第一控制信号的控制下断开,在所述第二控制信号的控制下导通;所述第二开关控制子电路的输入端与所述外部电压源电连接,所述第二开关控制子电路的输出端与所述放大子电路的输入端电连接,所述放大子电路的输出端分别与所述电源管理电路和所述触控与显示集成电路电连接;所述第二开关控制子电路被配置为在所述第一控制信号的控制下导通,在所述第二控制信号的控制下断开;所述放大子电路被配置为在所述第二开关控制子电路导通时,接收所述第一参考电压,并对所述第一参考电压进行放大处理得到第二参考电压,将所述第二参考电压分别提供给所述电源管理电路和所述触控与显示集成电路。
- 如权利要求7-9任一项所述的驱动电路,其中,所述电源管理电路包括:第一电压转化子电路和第二电压转化子电路;所述第一电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化,并将得到的显示面板源极正极模拟电压和显示面板源极负极模拟电压提供给所述触控与显示集成电路;所述第二电压转化子电路被配置为将所述第一参考电压或所述第二参考电压进行转化,并将得到的显示面板栅极开态电压和显示面板栅极关态电压提供给所述栅极驱动电路。
- 一种显示装置,其中,包括如权利要求7-11任一项所述的驱动电路,以及与所述驱动电路电连接的液晶显示面板。
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CN106484069A (zh) * | 2015-08-31 | 2017-03-08 | 中兴通讯股份有限公司 | 一种电源管理的方法及投影设备 |
CN107146592A (zh) * | 2017-07-20 | 2017-09-08 | 京东方科技集团股份有限公司 | 液晶显示面板的驱动方法、驱动电路和显示装置 |
CN208986673U (zh) * | 2018-08-07 | 2019-06-14 | 昆山龙腾光电有限公司 | 电源管理电路以及显示装置 |
CN110323739A (zh) * | 2019-06-20 | 2019-10-11 | 浙江大华技术股份有限公司 | 一种供电设备以及供电*** |
CN111243540A (zh) * | 2020-02-21 | 2020-06-05 | 合肥鑫晟光电科技有限公司 | 一种显示面板的驱动方法、其驱动电路及显示装置 |
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