WO2024007818A1 - 一种显示驱动电路、集成电路、oled屏、设备及方法 - Google Patents
一种显示驱动电路、集成电路、oled屏、设备及方法 Download PDFInfo
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Definitions
- the present application relates to the field of electronic technology, and in particular to a display driving circuit, integrated circuit, OLED screen, equipment and method.
- OLED screens are widely used in various terminal devices with display functions such as mobile phones, computers, and televisions.
- OLED screens usually use a 7T1C pixel circuit, that is, the pixel circuit includes seven transistors (transistors, T) and a capacitor (capacitor, C).
- the seven transistors include a data thin film transistor (DTFT).
- This application provides a display driving circuit, integrated circuit, OLED screen, equipment and method for improving the stability of the driving current of the pixel circuit.
- a display driving circuit for driving an OLED screen.
- the OLED screen is used to work in multiple refresh frequency cycles, wherein each refresh frequency cycle includes a data writing frame and multiple holding frames.
- the plurality of holding frames are configured after the data writing frame, and the display driving circuit is used to provide data signals in the data writing frame and provide holding voltages in the holding frames;
- the display driving circuit includes a plurality of data channels, and the OLED screen It includes a plurality of pixel circuits; wherein the plurality of data channels are used to provide data signals to the plurality of pixel circuits in a one-to-one correspondence manner, and the data signals can be used to refresh data of the corresponding pixel circuits;
- the display driving circuit also includes A voltage holding channel is used to provide a holding voltage for the plurality of pixel circuits.
- the holding voltage can be used to excite the pixel circuit, for example, to excite the carriers of the DTFT in the pixel circuit to increase the driving current; the display driver
- the circuit also includes a plurality of screen driving switches arranged in one-to-one correspondence with the plurality of pixel circuits, wherein each screen driving switch is used to selectively provide the data signal and the holding voltage to the corresponding pixel circuit.
- the display driving circuit can provide data signals to multiple pixel circuits in the OLED screen in a one-to-one correspondence manner through multiple data channels to refresh the multiple pixel circuits, and can provide data signals for the multiple pixel circuits through voltage holding channels.
- the pixel circuit provides a holding voltage to excite the plurality of pixel circuits, so that the driving current of the plurality of pixel circuits does not decrease with time, and at the same time, the structure of the pixel circuit in the OLED screen can be changed without changing the structure. Multiple pixel circuits share this voltage holding channel, thereby stimulating multiple pixel circuits of the OLED screen through smaller power consumption. This further improves the stability of the driving currents of the plurality of pixel circuits.
- the voltage holding channel includes a low dropout linear regulator LDO, and the LDO is used to provide a holding voltage for each pixel circuit in the plurality of pixel circuits.
- LDO low dropout linear regulator
- the voltage holding channel includes a dedicated driving circuit
- the dedicated driving circuit is used to provide a holding voltage for each pixel circuit in the plurality of pixel circuits.
- each data channel in the plurality of data channels includes a driving circuit, the voltage holding channel multiplexes the driving circuits in some data channels, and the multiplexed driving circuit is used to Each pixel circuit of the plurality of pixel circuits is provided with a holding voltage.
- the display can be reduced.
- the plurality of pixel circuits includes 1280 pixel circuits or 2560 pixel circuits.
- the OLED screen is a low-temperature polycrystalline oxide LTPO display screen.
- the above possible implementation method provides a display screen that supports extremely low frame rates.
- the display driving circuit is used to drive the LTPO display screen, the problem of low frame rate flickering of the LTPO display screen can be avoided.
- an OLED screen is provided.
- the OLED screen is used to work in multiple refresh frequency cycles, wherein each refresh frequency cycle includes a data writing frame and multiple holding frames.
- the data writing frame is later configured with The plurality of holding frames
- the OLED screen is used to receive the data signal provided by the display driving circuit in the data writing frame, and receive the holding voltage provided by the display driving circuit in the holding frame
- the OLED screen includes a plurality of pixel circuits
- the multiple The plurality of pixel circuits are respectively used to receive data signals provided by multiple data channels of the display driving circuit in a one-to-one correspondence manner; the plurality of pixel circuits are also used to receive the holding voltage provided by the voltage holding channel of the display driving circuit;
- the data signal and the holding voltage received by each pixel circuit are selected by the screen driving switch corresponding to the pixel circuit in the display driving circuit.
- the pixel circuit includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a data thin film transistor, a capacitor, and a light emitting diode. ; wherein, one pole of the first transistor is coupled to the first node, the capacitor is coupled between the first node and the power terminal, one pole of the fourth transistor is coupled to the second node, and the other pole of the fourth transistor is used to receive The data signal and the holding voltage, the fifth transistor is coupled between the power terminal and the second node, the third transistor is coupled between the first node and the third node, and the data thin film transistor is coupled between the second node and the third node.
- control terminal of the data thin film transistor is coupled to the first node, one pole of the second transistor, one pole of the sixth transistor and one pole of the light-emitting diode are coupled, and the other pole of the sixth transistor is coupled to the third node. node.
- a control method for a display driving circuit is provided.
- the display driving circuit is used to drive an OLED screen.
- the OLED screen is used to work in multiple refresh frequency cycles, wherein each refresh frequency cycle includes a data writing frame. and a plurality of holding frames.
- the data writing frame is later configured with the plurality of holding frames.
- the display driving circuit is used to provide a data signal in the data writing frame and a holding voltage in the holding frame.
- the display driving circuit includes a plurality of holding frames.
- the display OLED screen includes a plurality of pixel circuits, and a plurality of screen driving switches are arranged in one-to-one correspondence with the plurality of pixel circuits.
- the method includes: the plurality of data channels are Provide data signals to the plurality of pixel circuits in a one-to-one correspondence manner; the voltage holding channel provides holding voltages to the plurality of pixel circuits; each screen driving switch in the plurality of screen driving switches selects and provides the corresponding pixel circuit with the data signal. data signal and the hold voltage.
- the voltage holding channel includes a low dropout linear regulator LDO.
- the voltage holding channel provides holding voltages for the plurality of pixel circuits, including: the LDO is for the plurality of pixel circuits. Each pixel circuit in the circuit provides one of this holding voltage.
- the voltage holding channel includes a dedicated driving circuit.
- the voltage holding channel provides holding voltages for the plurality of pixel circuits, including: the dedicated driving circuit for the plurality of pixel circuits. Each pixel circuit provides one of this holding voltage.
- each data channel in the plurality of data channels includes a driving circuit, and the voltage holding channel multiplexes the driving circuits in some of the data channels, and the voltage holding channel is the plurality of data channels.
- Each pixel circuit provides a holding voltage, including: a multiplexed driving circuit provides a holding voltage for each pixel circuit in the plurality of pixel circuits.
- the plurality of pixel circuits includes 1280 pixel circuits or 2560 pixel circuits.
- the OLED screen is a low-temperature polycrystalline oxide LTPO display screen.
- a display driving integrated circuit which includes the display driving circuit provided in the first aspect or any possible implementation of the first aspect.
- a display device in yet another aspect of the present application, includes: an OLED screen, and a display driving circuit as provided in the first aspect or any possible implementation of the first aspect.
- the display driving circuit Used to drive the OLED screen.
- Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present application.
- Figure 2 is a schematic structural diagram of a display unit provided by an embodiment of the present application.
- Figure 3 is a schematic structural diagram of a pixel unit provided by an embodiment of the present application.
- Figure 4 is a schematic diagram of a transfer characteristic curve of a DTFT provided by an embodiment of the present application.
- Figure 5 is a schematic structural diagram of another pixel unit provided by an embodiment of the present application.
- Figure 6 is a schematic diagram of a refresh frequency cycle provided by an embodiment of the present application.
- Figure 7 is a schematic structural diagram of a display driving circuit provided by an embodiment of the present application.
- Figure 8 is a schematic structural diagram of another display driving circuit provided by an embodiment of the present application.
- Figure 9 is a schematic structural diagram of another display driving circuit provided by an embodiment of the present application.
- Figure 10 is a schematic structural diagram of another display driving circuit provided by an embodiment of the present application.
- Figure 11 is a schematic structural diagram of another display driving circuit provided by an embodiment of the present application.
- FIG. 12 is a schematic structural diagram of another display device provided by an embodiment of the present application.
- At least one of a, b or c can mean: a, b, c, a and b, a and c, b and c or a, b and c, where a, b and c can It can be single or multiple.
- the technical solution of this application can be applied to various display devices that support organic light emitting display (OLED) screens.
- the display device may include but is not limited to: mobile phones, tablets, laptops, computers, ultra-mobile personal computers (UMPC), netbooks, camcorders, cameras, vehicle-mounted devices (for example, cars, bicycles, electric vehicles) , airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, or augmented reality (AR) equipment, etc.
- FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present application.
- the display device is explained using a mobile phone as an example.
- the display device may include: a radio frequency (RF) circuit 110, a memory 120, an input unit 130, a display unit 140, a sensor 150, an audio circuit 160, a processor 170, a power supply 180 and other components.
- RF radio frequency
- RF circuit 110 may be used to send and receive information, or to receive or send signals during a phone call. In particular, after receiving the downlink information of the base station, it is processed by the processor 170; in addition, the uplink data is sent to the base station.
- the RF circuit 110 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc.
- LNA low noise amplifier
- the RF circuit 110 can also communicate with the network and other devices through wireless communication.
- the memory 120 can be used to store data, software programs and modules; it mainly includes a stored program area and a stored data area, wherein the stored program area can store an operating system and at least one application required for a function, such as a sound playback function, an image playback function, etc. ;
- the storage data area can store data created according to the use of the display device, such as audio data, image data, phone book, etc.
- the display device may include high-speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
- the input unit 130 may be used to receive input numeric or character information and generate key signal input related to user settings and function control of the display device.
- the input unit 130 may include a touch panel 131 and other input devices 132.
- the touch panel 131 can also be called a touch screen, and can collect the user's touch operations on or near it (such as the user's operations on or near the touch panel using any suitable object or accessory such as a finger, stylus, etc.), And drive the corresponding connection device according to the preset program.
- other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power switch keys, etc.), trackball, mouse, joystick, etc.
- the display unit 140 may be used to display information input by a user or information provided to a user, various menus of the display device, and the like.
- the display unit 140 may include a display screen 141, which may be used to display the above information.
- the touch panel 131 can cover the display screen 141. When the touch panel 131 detects a touch operation on or near it, it is sent to the processor 170 to determine the type of the touch event. Then the processor 170 determines the type of the touch event according to the type of the touch event. Corresponding visual output is provided on display screen 141 .
- the touch panel 131 and the display screen 141 are used as two independent components to implement the input and input functions of the display device, in some embodiments, the touch panel 131 and the display screen 141 can be integrated. Implement the input and output functions of the display device.
- Sensors 150 may include one or more sensors for providing various aspects of status assessment for the display device.
- the sensor 150 may include a light sensor, which may be used in imaging applications, that is, become an integral part of a camera or camera.
- the sensor 150 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor, through which the acceleration/deceleration, orientation, open/closed state, relative positioning of components, or This displays temperature changes of the device, etc.
- Audio circuitry 160, speakers, and microphones may provide an audio interface between the user and the display device.
- the audio circuit 160 can transmit the electrical signal converted from the received audio data to the speaker, which converts it into a sound signal and outputs it; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received and converted by the audio circuit 160
- the audio data is then output to the RF circuit 110 for transmission to, for example, another mobile phone, or the audio data is output to the memory 120 for further processing.
- the processor 170 is the control center of the display device, using various interfaces and lines to connect various parts of the entire display device, by running or executing software programs and/or modules stored in the memory 120, and calling the software programs and/or modules stored in the memory 120. data, perform various functions of the display device and process data, thereby overall monitoring the display device.
- the processor 170 may include one or more processing units, which may include but are not limited to: a central processing unit, a general-purpose processor, a digital signal processor, a neural network processor, an image processing unit, and an image signal processor. Processor, microcontroller or microprocessor, etc.
- the processor 170 may also include other hardware circuits or accelerators, such as application specific integrated circuits, field programmable gate arrays or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.
- the processor 170 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, etc.
- the display device may also include a power source 180 (such as a battery) to power various components.
- the power supply 180 can be logically connected to the processor 170 through a power management system, so that functions such as charging, discharging, and power consumption management can be implemented through the power management system.
- the display device may also include a wireless fidelity (WiFi) module, a Bluetooth module, etc., which will not be described again in the embodiments of the present application.
- WiFi wireless fidelity
- Bluetooth Bluetooth
- the display screen 141 in the display unit 140 may be an organic light-emitting (OLED) screen.
- the OLED screen includes but is not limited to: low temperature polycrystalline oxide (LTPO) display screen, low temperature polycrystalline silicon (low temperature poly-silico, LTPS) display screen.
- the above-mentioned display unit 140 may also include a display driver integrated chip (DDIC) for driving the OLED screen.
- the OLED screen may include multiple pixel circuits, and the DDIC may include multiple drive circuits.
- the multiple drive circuits are coupled to the multiple pixel circuits in a one-to-one correspondence.
- One drive circuit corresponds to The pixel circuit can be used to drive a corresponding coupled pixel circuit, that is, to provide a driving signal DA to the pixel circuit.
- the pixel circuit can be implemented using a 7T1C structure.
- the 7T1C pixel circuit includes: transistors T1 to T6 , a data thin film transistor DTFT, a capacitor C, and a light emitting diode D.
- the drain of the transistor T4, the drain of the transistor T5 and the source of the data thin film transistor DTFT are coupled to the node B; one end of the capacitor C and the source of the transistor T5 are coupled to the first power terminal VDD; The other end of the capacitor C, the gate of the data thin film transistor DTFT, the drain of the transistor T3, and the drain of the transistor T1 are coupled to the node A; the drain of the data thin film transistor DTFT, the source of the transistor T3, and the drain of the transistor T2
- the source electrode is coupled to one end of the light-emitting diode D, and the other end of the light-emitting diode D is coupled to the second power supply terminal VSS.
- the source of the transistor T4 is used to receive the driving signal DA, and the gate is used to receive the control signal pSn; the source of the transistor T1 is used to receive the first voltage Vin1, and the gate is used to receive the reset control signal nSn-1; the drain of the transistor T2
- the gate electrode of the transistor T3 is used to receive the control signal nSn, the gate electrode of the transistor T5 and the gate electrode of the transistor T6 are used to receive the light emission control signal EM. .
- the transistor T1 is turned on to initialize the voltage of node A; in the charging phase, the transistors T3 and T4 are turned on, the data thin film transistor DTFT is turned on, and the source electrode of the transistor T4 is charged to the transistor T3 and the data thin film transistor DTFT.
- the transistor T2 is turned on to clear the voltage in the light-emitting diode D; in the refresh phase of the pixel circuit, the transistors T5 and T6 are turned on, and the data thin film transistor DTFT drives the light-emitting diode D to emit light and display; in the holding phase of the pixel circuit In the first sub-phase of the holding phase of the pixel circuit, the transistor T4 is turned on, and the source electrode of the transistor T4 provides voltage to node B; in the second sub-stage of the holding phase of the pixel circuit, the transistors T5 and T6 are turned on, and the data thin film transistor DTFT discharges to hold the light-emitting diode D glows.
- the refresh phase may also be called a data writing frame, and the holding phase may also be called a holding frame or a rest frame.
- FIG. 4 shows a schematic diagram of the transfer characteristic curve of the DTFT changing with time t.
- the abscissa represents the gate-source voltage VGS of the DTFT, and the ordinate represents the current I flowing through the DTFT.
- the above-mentioned smaller driving current will also cause the brightness of the light-emitting diode D to decrease.
- displays that support extremely low frame rates such as LTPO displays
- being in the maintenance phase for a long time will reduce the brightness of the light-emitting diode D to the point where it is The human eye detects this, resulting in low frame rate flickering issues.
- the first solution is to excite the carriers of the DTFT by time-division multiplexing the transistor T4 in the pixel circuit.
- the source of the transistor T4 is used to receive the data voltage provided by the drive circuit corresponding to the pixel circuit in the DDIC, and the data voltage is used to refresh the pixel circuit; during the refresh phase of the pixel circuit stage, the source of the transistor T4 is used to receive an excitation voltage provided by a driving circuit corresponding to the pixel circuit, and the excitation voltage is used to excite carriers of the DTFT in the pixel circuit.
- this solution requires the corresponding multiple drive circuits in the DDIC to be working during both the refresh phase and the retention phase, and the multiple drive circuits originally do not work during the retention phase ( That is, the multiple driving circuits can be in a closed state), which will cause a significant increase in power consumption of the DDIC.
- the second solution is to excite the carriers of the DTFT by adding a new transistor T8.
- the pixel circuit also includes a transistor T8, the source of the transistor T8 is coupled to the node B, the gate of the transistor T8 is used to receive the control signal pS2, and the drain of the transistor T8 pole is used to receive the third input voltage Vin3.
- the transistor T8 is turned off, and the source of the transistor T4 is used to receive the data voltage provided by the driving circuit corresponding to the pixel circuit in the DDIC.
- the data voltage is used to refresh the pixel circuit; in the pixel During the refresh phase of the circuit, the transistor T4 is turned off, and the source of the transistor T8 is used to receive an excitation voltage.
- the excitation voltage is used to excite carriers of the DTFT in the pixel circuit.
- embodiments of the present application provide a display driving circuit without changing the structure of the pixel circuit of the OLED screen.
- the display driving circuit can provide data voltage during the refresh phase of the OLED screen.
- the holding phase provides the excitation voltage, and compared with the above two solutions, it can stimulate the current carrying capacity of DTFT in the multiple pixel circuits of the OLED screen through smaller power consumption without increasing the cost of the OLED screen. son.
- Embodiments of the present application provide a display driving circuit, which can be used to drive an OLED screen, and the OLED screen can be an LTPO display screen or an LTPS display screen.
- the OLED screen is used to work in multiple refresh frequency cycles, where each refresh frequency cycle includes a data write frame and multiple hold frames.
- the data write frame is later configured with the multiple hold frames. frame.
- the display driving circuit is used to provide a data signal in the data writing frame and a holding voltage in the holding frame.
- the display driving circuit includes multiple data channels
- the OLED screen includes multiple pixel circuits.
- the multiple pixel circuits may include 1280 pixel circuits or 2560 pixel circuits.
- the plurality of data channels are used to provide data signals to the plurality of pixel circuits in a one-to-one correspondence manner;
- the display driving circuit also includes a voltage holding channel, and the voltage holding channel is used to provide holding voltages to the plurality of pixel circuits.
- the display driving circuit also includes a plurality of screen driving switches arranged in one-to-one correspondence with the plurality of pixel circuits, wherein each screen driving switch is used to selectively provide the data signal and the holding voltage to the corresponding pixel circuit.
- a driver circuit can be included in each data channel.
- the display driving circuit includes: a first data channel 10 and a voltage holding channel 20.
- the output end of the first data channel 10 and the output end of the voltage holding channel 20 are both used to couple the first in the OLED screen.
- the first data channel 10 is used to: provide a first data signal to the first pixel circuit Pix1.
- the first data signal is used to refresh the first pixel circuit Pix1.
- the first data is output in the data writing frame of the first pixel circuit Pix1.
- the first data signal may be a first data voltage.
- the first data channel 10 is a data channel corresponding to the first pixel circuit Pix1 in the display driving circuit.
- the voltage holding channel 20 is used to: provide a first holding voltage for the first pixel circuit Pix1, and the first holding voltage is used to excite the first pixel circuit Pix1. For example, in the holding frame of the first pixel circuit Pix1, the first holding voltage is output.
- a holding voltage can be used to excite carriers of the driving thin film transistor DTFT in the first pixel circuit Pix1 to increase the driving voltage. flow.
- the first holding voltage can be a fixed voltage, that is, the voltage value of the first holding voltage can be fixed, and the specific voltage value can be set according to the actual situation. It only needs to ensure that the first holding voltage can stimulate the current carrying capacity in the DTFT.
- the voltage value of the first holding voltage is not specifically limited in the embodiment of the present application.
- the voltage holding channel 20 may be in a closed state, the first data channel 10 may be in a working state and may be used to output the first data signal, and the first data signal may be used to refresh the first Pixel circuit Pix1.
- the first data channel 10 may be in a closed state, the voltage holding channel 20 may be in a working state and may be used to output the first holding voltage, and the first holding voltage may be used to excite the first pixel circuit Pix1.
- the first DTFT excites the carriers captured by the interface defects in the first DTFT to restore the driving current of the first DTFT.
- the OLED screen may also include a second pixel circuit Pix2, and the output end of the voltage holding channel 20 is also used to couple the second pixel circuit Pix2. That is, the output end of the voltage holding channel 20 can be coupled to the first pixel circuit Pix1 and the second pixel circuit Pix2 at the same time.
- the voltage holding channel 20 is also used to: provide a second holding voltage for the second pixel circuit Pix2, and the second holding voltage is used to excite the second pixel circuit Pix2, for example, output the second holding voltage in the holding frame of the second pixel circuit Pix2,
- the second DTFT in the second pixel circuit Pix2 is excited by the second holding voltage, that is, the carriers captured by the interface defects in the second DTFT are excited to restore the driving current of the second DTFT.
- the second holding voltage may be a fixed voltage, and the second holding voltage may be equal to the first holding voltage.
- the voltage holding channel 20 can also be used in the holding frame of the other pixel circuits to correspondingly output the holding voltage used to excite the DTFT in the other pixel circuits.
- the display driving circuit can excite DTFT in multiple pixel circuits of the OLED screen through a voltage holding channel 20, so that it can pass a smaller pixel circuit without changing the structure of the pixel circuit in the OLED screen.
- Power consumption excites carriers of DTFT in multiple pixel circuits of the OLED screen.
- the display driving circuit may also include: a second data channel 30 corresponding to the second pixel circuit Pix2.
- the second data channel 30 may be used to provide a second data signal for the second pixel circuit Pix2.
- the second data signal is used for The second pixel circuit Pix2 is refreshed, for example, the second data signal is output in the data writing frame of the second pixel circuit Pix2.
- the second data signal may be a second data voltage.
- the display driving circuit may also include a first screen driving switch SW1.
- the selection terminal of the first screen driving switch SW1 is used to couple with the output terminal of the first data channel 10 or the output terminal of the voltage holding channel 20.
- the first screen driving switch SW1 The fixed end of the switch SW1 is used to couple the first pixel circuit Pix1.
- the first screen driving switch SW1 is used to: gate the first data channel 10 or gate the voltage holding channel 20 .
- the first screen driving switch SW1 is used to: gate the first data channel 10 in the data writing frame of the first pixel circuit Pix1, so that the first data channel 10 can be used in the data writing frame of the first pixel circuit Pix1
- the first data signal is output to the first pixel circuit Pix1; the voltage holding channel 20 is gated during the holding frame of the first pixel circuit Pix1, so that the voltage holding channel 20 outputs the voltage holding channel 20 to the first pixel circuit Pix1 during the holding frame of the first pixel circuit Pix1. Maintain voltage.
- the display driving circuit may also include a second screen driving switch SW2, and the fixed end of the second screen driving switch SW2 may be used to couple the second pixel circuit Pix2.
- the selection end of the screen driving switch SW2 can be used to couple the output end of the second data channel 30 or the output end of the voltage holding channel 20 .
- the display driving circuit also A larger number of other screen drive switches SW may be included. The fixed end of each screen drive switch SW can be used to couple the corresponding pixel circuit, and the selective end of each screen drive switch SW can be used to couple the output end or voltage of the corresponding drive circuit. Hold the output of channel 20.
- the above-mentioned voltage holding channel 20 can be implemented in a variety of different ways, for example, adding an additional voltage holding channel 20 in the display driving circuit, or multiplexing the data channel corresponding to the pixel circuit in the display driving circuit as a voltage holding channel. 20.
- the first way is to add an additional voltage holding channel 20 to the display driving circuit.
- the voltage holding channel 20 includes a low dropout linear regulator (LDO), which can be used to provide a holding voltage for each pixel circuit, that is, the LDO can simultaneously stimulate multiple pixel circuits in the OLED screen.
- LDO low dropout linear regulator
- the voltage holding channel 20 includes a dedicated driving circuit, which can be used to provide a holding voltage for each pixel circuit, that is, the voltage holding channel 20 can be specially designed.
- a drive circuit for outputting the above holding voltage In the above-mentioned Figures 8 and 9, the plurality of pixel circuits include 2560 pixel circuits (only one transistor is shown in the figure), and the display driving circuit includes 2560 data channels corresponding to the plurality of pixel circuits. And a newly added voltage holding channel 20 is used as an example for illustration.
- each of the plurality of data channels of the display driving circuit includes a driving circuit, and the voltage holding channel 20 multiplexes the driving circuits in some of the data channels.
- the voltage holding channel 20 multiplexes the driving circuit in one data channel (that is, multiplexes one driving circuit).
- the driving circuit may include two output terminals, one output terminal may be used to couple with the corresponding pixel circuit to output data voltage to the pixel circuit, and the other output terminal may be used to communicate with multiple pixel circuits in the OLED screen. coupled to provide holding voltages for the plurality of pixel circuits.
- the voltage holding channel 20 multiplexes the driving circuits in at least two data channels, that is, multiplexes at least two driving circuits.
- each of the at least two driving circuits may include two output terminals, one output terminal may be used to couple with the corresponding pixel circuit to output the data voltage to the pixel circuit, and the other output terminal may be used to couple with the corresponding pixel circuit.
- Part of the pixel circuits among the plurality of pixel circuits in the OLED screen are coupled to provide a holding voltage for the part of the pixel circuits. That is, the at least two driving circuits provide holding voltages to different pixel circuits in the plurality of pixel circuits in a distributed manner.
- the plurality of pixel circuits include 2560 pixel circuits (only one transistor is shown in the figure), and the display driving circuit includes 2560 driving circuits corresponding to the plurality of pixel circuits.
- the driving circuit multiplexed by the voltage holding channel 20 is the 1280th driving circuit.
- the driving circuit multiplexed by at least two voltage holding channels 20 includes the 1280th and 1281st driving circuits as an example.
- the display driving circuit provided by the embodiment of the present application can provide data signals in the data writing frame of the OLED screen and provide a holding voltage in the holding frame of the OLED screen without changing the structure of the pixel circuit of the OLED screen. And compared with the two solutions in the above related technologies, the carriers of the DTFT in the multiple pixel circuits of the OLED screen can be excited with smaller power consumption without increasing the cost of the OLED screen. That is to say, the solution provided by the embodiment of the present application can effectively reduce the cost of the OLED screen and the power consumption of the display driving circuit compared with the two solutions in the above-mentioned related technologies.
- embodiments of the present application also provide an OLED screen.
- the OLED screen is used to work in multiple screen refresh frequency cycles. Each refresh frequency cycle includes a data write frame and multiple hold frames. The data write frame is later configured with the multiple hold frames.
- the OLED screen is used to receive data provided by the display driver circuit in the data write frame.
- the signal receives the holding voltage provided by the display driving circuit in the holding frame; the OLED screen includes a plurality of pixel circuits; the plurality of pixel circuits are respectively used to receive multiple data channels of the display driving circuit in a one-to-one correspondence manner.
- the plurality of pixel circuits are also used to receive the holding voltage provided by the display driving circuit voltage holding channel; wherein the data signal and the holding voltage received by each pixel circuit are generated by the display driving circuit and the Selected by the screen driver switch corresponding to the pixel circuit.
- the pixel circuit includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a data thin film transistor, a capacitor and a light emitting diode; wherein, the One pole of a transistor is coupled to the first node, the capacitor is coupled between the first node and the power supply terminal, one pole of the fourth transistor is coupled to the second node, and a fifth transistor is coupled between the power supply terminal and the second node.
- the third transistor is coupled between the first node and the third node
- the data thin film transistor is coupled between the second node and the third node
- the control terminal of the data thin film transistor is coupled to the first node
- a One pole of the sixth transistor is coupled to one pole of the light-emitting diode
- the other pole of the sixth transistor is coupled to the third node.
- An embodiment of the present application also provides a display driving integrated circuit.
- the display driving integrated circuit includes any display driving circuit provided by the embodiments of the present application.
- the display driving circuit can be any one of Figures 7 to 11.
- the diagram shows the provided display driver circuit.
- the relevant description of the display driving circuit please refer to the above description, and the embodiments of the present application will not be described again here.
- Embodiments of the present application also provide a control method for a display driving circuit.
- the display driving circuit is used to drive an OLED screen and is used to drive an organic electro-laser display OLED screen.
- the OLED screen is used to work in multiple refresh frequency cycles, wherein Each refresh frequency cycle includes a data writing frame and a plurality of holding frames.
- the data writing frame is later configured with the plurality of holding frames.
- the display driving circuit is used to provide a data signal in the data writing frame, and in the holding frame.
- the frame provides a holding voltage.
- the display driving circuit includes a plurality of data channels, a voltage holding channel and a plurality of screen driving switches.
- the display OLED screen includes a plurality of pixel circuits.
- the plurality of screen driving switches are arranged in one-to-one correspondence with the plurality of pixel circuits. ;
- the method includes: the plurality of data channels provide data signals for the plurality of pixel circuits in a one-to-one correspondence; the voltage holding channel provides holding voltages for the plurality of pixel circuits; each of the plurality of screen drive switches The screen driving switch selects and provides the data signal and the holding voltage to the corresponding pixel circuit.
- the multiple pixel circuits include 1280 pixel circuits or 2560 pixel circuits.
- the voltage holding channel includes a low dropout linear regulator LDO.
- the voltage holding channel provides holding voltages for the plurality of pixel circuits, including: the LDO is for each of the plurality of pixel circuits.
- the pixel circuit provides a holding voltage.
- the voltage holding channel includes a dedicated driving circuit.
- the voltage holding channel provides holding voltages for the plurality of pixel circuits, including: the dedicated driving circuit for each pixel in the plurality of pixel circuits.
- the circuit provides a holding voltage.
- each data channel in the plurality of data channels includes a driving circuit, the voltage holding channel multiplexes the driving circuits in part of the data channels, and the voltage holding channel is the plurality of pixel circuits.
- Providing a holding voltage includes: a multiplexed driving circuit providing one holding voltage for each pixel circuit in the plurality of pixel circuits.
- the OLED screen is a low-temperature polycrystalline oxide LTPO display.
- the control method can be used without changing the structure of the pixel circuit of the OLED screen.
- the display driving circuit is controlled to provide data voltage in the data writing frame of the OLED screen and to provide excitation voltage in the holding frame of the OLED screen.
- the cost of the OLED screen can be increased without increasing the cost. Under the premise of stimulating the carriers of the DTFT in the multiple pixel circuits of the OLED screen with relatively small power consumption.
- a display device in another aspect of the present application, includes: an OLED screen, and a display drive integrated circuit DDIC coupled to the OLED screen.
- the DDIC includes a display drive circuit,
- the display driving circuit is used to drive the OLED screen, and the display driving circuit can be any display driving circuit provided in the embodiments of the present application.
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Abstract
一种显示驱动电路、集成电路、OLED屏、设备及方法,用于提高OLED屏中像素电路的驱动电流的稳定性。显示驱动电路用于在OLED屏的数据写入帧提供数据信号、在保持帧提供保持电压;显示驱动电路包括多个数据通道(10,30),显示OLED屏包括多个像素电路;多个数据通道(10,30)以一一对应的方式为多个像素电路提供数据信号;显示驱动电路还包括电压保持通道(20),电压保持通道(20)为多个像素电路提供保持电压;显示驱动电路还包括多个屏驱动开关与多个像素电路一一对应设置,每个屏驱动开关用于为对应的像素电路选择提供数据信号和保持电压。
Description
本申请要求于2022年07月04日提交国家知识产权局、申请号为202210779780.9、申请名称为“一种OLED控制方法”的中国专利申请的优先权,以及于2022年10月31日提交国家知识产权局、申请号为202211350277.8、申请名称为“一种显示驱动电路、集成电路、OLED屏、设备及方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及电子技术领域,尤其涉及一种显示驱动电路、集成电路、OLED屏、设备及方法。
有机电激光显示(organic light emitting display,OLED)屏广泛应用在手机、电脑、电视等各种具有显示功能的终端设备上。目前,OLED屏中通常采用7T1C的像素电路,即该像素电路包括7个晶体管(transistor,T)和一个电容(capacitor,C)。其中,该7个晶体管中包括一个数据薄膜晶体管(data thin film transistor,DTFT)。
现有技术中,该像素电路在工作一段时间后,该像素电路的驱动电流会逐渐变小,从而导致该像素电路的工作性能降低,因此如何提高该像素电路的驱动电流的稳定性是亟需解决的问题。
发明内容
本申请提供一种显示驱动电路、集成电路、OLED屏、设备及方法,用于提高像素电路的驱动电流的稳定性。
为达到上述目的,本申请采用如下技术方案:
第一方面,提供一种显示驱动电路,用于驱动OLED屏,该OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧,该显示驱动电路用于在该数据写入帧提供数据信号、在该保持帧提供保持电压;该显示驱动电路包括多个数据通道,该OLED屏包括多个像素电路;其中,该多个数据通道用于以一一对应的方式为该多个像素电路提供数据信号,该数据信号可用于刷新对应的像素电路的数据;该显示驱动电路还包括电压保持通道,该电压保持通道用于为该多个像素电路提供保持电压,该保持电压可用于激发像素电路,比如,激发像素电路中的DTFT的载流子,以提高驱动电流;该显示驱动电路还包括多个屏驱动开关与该多个像素电路一一对应设置,其中每个屏驱动开关用于为对应的像素电路选择提供该数据信号和该保持电压。
上述技术方案中,该显示驱动电路可以通过多个数据通道以一一对应的方式为该OLED屏中的多个像素电路提供数据信号以刷新该多个像素电路,通过电压保持通道为该多个像素电路提供保持电压以激发该多个像素电路,使得该多个像素电路的驱动电流不随着时间的变化而减小,同时能够在不改变该OLED屏中像素电路的结构的前提下,使该多个像素电路共用该电压保持通道,从而通过较小的功耗激发该OLED屏的多个像素电路,
进而提高该多个像素电路的驱动电流的稳定性。
在第一方面的一种可能的实现方式中,该电压保持通道包括低压差线性稳压器LDO,LDO用于为该多个像素电路中的每个像素电路提供一个保持电压。上述可能的实现方式中,通过在该显示驱动电路中新增LDO,用于为该OLED屏中的多个像素电路提供对应的用于激发像素电路的保持电压,能够在不改变该OLED屏中像素电路的结构的前提下,通过较小的功耗激发该OLED屏的多个像素电路,以提高该多个像素电路的驱动电流的稳定性。
在第一方面的一种可能的实现方式中,该电压保持通道包括专用驱动电路,该专用驱动电路用于为该多个像素电路中的每个像素电路提供一个保持电压。上述可能的实现方式中,通过在该显示驱动电路中新增专用驱动电路,用于为该OLED屏中的多个像素电路提供对应的用于激发像素电路的保持电压,能够在不改变该OLED屏中像素电路的结构的前提下,通过较小的功耗激发该OLED屏的多个像素电路,以提高该多个像素电路的驱动电流的稳定性。
在第一方面的一种可能的实现方式中,该多个数据通道中的每个数据通道包括一个驱动电路,该电压保持通道复用部分数据通道中的驱动电路,复用的驱动电路用于为该多个像素电路中的每个像素电路提供一个保持电压。上述可能的实现方式中,通过复用该显示驱动电路中部分数据通道的驱动电路,用于为该OLED屏中的多个像素电路提供对应的用于激发像素电路的保持电压,能够降低该显示驱动电路的成本,同时在不改变该OLED屏中像素电路的结构的前提下,通过较小的功耗激发该OLED屏的多个像素电路,以提高该多个像素电路的驱动电流的稳定性。
在第一方面的一种可能的实现方式中,该多个像素电路包括1280个像素电路或2560个像素电路。
在第一方面的一种可能的实现方式中,该OLED屏为低温多晶氧化物LTPO显示屏。上述可能的实现方式中,提供了一种支持极致低帧率的显示屏,在采用该显示驱动电路驱动该LTPO显示屏时,能够避免该LTPO显示屏出现低帧率闪烁的问题。
第二方面,提供一种OLED屏,该OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧,该OLED屏用于在该数据写入帧接收显示驱动电路提供的数据信号、在该保持帧接收显示驱动电路提供的保持电压;该OLED屏包括多个像素电路;该多个像素电路,分别用于接收该显示驱动电路的多个数据通道以一一对应的方式提供的数据信号;该多个像素电路,还用于接收该显示驱动电路电压保持通道提供的保持电压;其中,每个像素电路接收的该数据信号和该保持电压是由该显示驱动电路中与该像素电路对应的屏驱动开关选择的。
在第二方面的一种可能的实现方式中,该像素电路包括:第一晶体管、第二晶体管、第三晶体管、第四晶体管、第五晶体管、第六晶体管、数据薄膜晶体管、电容和发光二极管;其中,第一晶体管的一极耦合于第一节点,该电容耦合在第一节点与电源端之间,第四晶体管的一极耦合于第二节点,第四晶体管的另一极用于接收该数据信号和该保持电压,第五晶体管耦合在该电源端与第二节点之间,第三晶体管耦合在第一节点与第三节点之间,该数据薄膜晶体管耦合在第二节点与第三节点之间,该数据薄膜晶体管的控制端耦合于第一节点,第二晶体管的一极、第六晶体管的一极和该发光二极管的一极耦合,第六晶体管的另一极耦合于第三节点。
第三方面,提供一种显示驱动电路的控制方法,该显示驱动电路用于驱动OLED屏,该OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧,该显示驱动电路用于在该数据写入帧提供数据信号、在该保持帧提供保持电压,该显示驱动电路包括多个数据通道、电压保持通道和多个屏驱动开关,该显示OLED屏包括多个像素电路,多个屏驱动开关与该多个像素电路一一对应设置;该方法包括:该多个数据通道以一一对应的方式为该多个像素电路提供数据信号;该电压保持通道为该多个像素电路提供保持电压;该多个屏驱动开关中的每个屏驱动开关为对应的像素电路选择提供该数据信号和该保持电压。
在第三方面的一种可能的实现方式中,该电压保持通道包括低压差线性稳压器LDO,该电压保持通道为该多个像素电路提供保持电压,包括:该LDO为该多个像素电路中的每个像素电路提供一个该保持电压。
在第三方面的一种可能的实现方式中,该电压保持通道包括专用驱动电路,该电压保持通道为该多个像素电路提供保持电压,包括:该专用驱动电路为该多个像素电路中的每个像素电路提供一个该保持电压。
在第三方面的一种可能的实现方式中,该多个数据通道中的每个数据通道包括一个驱动电路,该电压保持通道复用部分数据通道中的驱动电路,该电压保持通道为该多个像素电路提供保持电压,包括:复用的驱动电路为该多个像素电路中的每个像素电路提供一个保持电压。
在第三方面的一种可能的实现方式中,该多个像素电路包括1280个像素电路或2560个像素电路。
在第三方面的一种可能的实现方式中,该OLED屏为低温多晶氧化物LTPO显示屏。
在本申请的另一方面,提供一种显示驱动集成电路,该显示驱动集成电路包括如第一方面或第一方面的任一种可能的实现方式所提供的显示驱动电路。
在本申请的又一方面,提供一种显示设备,该显示设备包括:OLED屏、以及如第一方面或第一方面的任一种可能的实现方式所提供的显示驱动电路,该显示驱动电路用于驱动该OLED屏。
可以理解地,上述提供的任一种OLED屏、显示驱动电路的控制方法、显示驱动集成电路和显示设备,其所能达到的有益效果可对应参考上文所提供的显示驱动电路中的有益效果,此处不再赘述。
图1为本申请实施例提供的一种显示设备的结构示意图;
图2为本申请实施例提供的一种显示单元的结构示意图;
图3为本申请实施例提供的一种像素单元的结构示意图;
图4为本申请实施例提供的一种DTFT的转移特性曲线的示意图;
图5为本申请实施例提供的另一种像素单元的结构示意图;
图6为本申请实施例提供的一种刷新频率周期的示意图;
图7为本申请实施例提供的一种显示驱动电路的结构示意图;
图8为本申请实施例提供的另一种显示驱动电路的结构示意图;
图9为本申请实施例提供的又一种显示驱动电路的结构示意图;
图10为本申请实施例提供的另一种显示驱动电路的结构示意图;
图11为本申请实施例提供的又一种显示驱动电路的结构示意图;
图12为本申请实施例提供的另一种显示设备的结构示意图。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述。在本申请中,“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B的情况,其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达,是指的这些项中的任意组合,包括单项(个)或复数项(个)的任意组合。例如,a,b或c中的至少一项(个),可以表示:a,b,c,a和b,a和c,b和c或a、b和c,其中a、b和c可以是单个,也可以是多个。
本申请的实施例采用了“第一”和“第二”等字样对名称或功能或作用类似的对象进行区分,本领域技术人员可以理解“第一”和“第二”等字样并不对数量和执行次序进行限定。“耦合”一词用于表示电性连接,包括通过导线或连接端直接相连或通过其他器件间接相连。因此“耦合”应被视为是一种广义上的电子通信连接。
需要说明的是,本申请中,“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言,使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请的技术方案可以应用于各种支持有机电激光显示(organic light emitting display,OLED)屏的显示设备中。该显示设备可以包括但不限于:手机、平板电脑、笔记本电脑、计算机、超级移动个人计算机(ultra-mobile personal computer,UMPC)、上网本、摄像机、照相机、车载设备(例如,汽车、自行车、电动车、飞机、船舶、火车、高铁等)、虚拟现实(virtual reality,VR)设备、或者增强现实(augmented reality,AR)设备等。
图1为本申请实施例提供的一种显示设备的结构示意图,该显示设备以手机为例进行说明。该显示设备可以包括:射频(radio frequency,RF)电路110、存储器120、输入单元130、显示单元140、传感器150、音频电路160、处理器170、以及电源180等部件。下面结合图1对该显示设备的各个构成部件进行具体的介绍:
RF电路110可用于收发信息,或在通话过程中接收或发送信号。特别地,将基站的下行信息接收后,给处理器170处理;另外,将上行的数据发送给基站。通常,RF电路110包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(low noise amplifier,LNA)、双工器等。此外,RF电路110还可以通过无线通信的方式与网络和其他设备通信。
存储器120可用于存储数据、软件程序以及模块;主要包括存储程序区和存储数据区,其中,存储程序区可存储操作***、至少一个功能所需的应用程序,比如声音播放功能、图像播放功能等;存储数据区可存储根据该显示设备的使用所创建的数据,比如音频数据、图像数据、电话本等。此外,该显示设备可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元130可用于接收输入的数字或字符信息,以及产生与该显示设备的用户设置以及功能控制有关的键信号输入。具体的,输入单元130可包括触摸面板131以及其他输入设备132。触摸面板131也可称为触控屏,可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触摸面板上或在触摸面板附近的操作),并根据预先设定的程式驱动相应的连接装置。可选的,其他输入设备132可以包括但不限于物理键盘、功能键(比如音量控制按键、电源开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元140可用于显示由用户输入的信息或提供给用户的信息以及该显示设备的各种菜单等。可选的,显示单元140可以包括显示屏141,显示屏141可用于显示上述信息。进一步的,触摸面板131可覆盖显示屏141,当触摸面板131检测到在其上或附近的触摸操作后,传送给处理器170以确定触摸事件的类型,随后处理器170根据触摸事件的类型在显示屏141上提供相应的视觉输出。虽然在图1中,触摸面板131与显示屏141是作为两个独立的部件来实现该显示设备的输入和输入功能,但是在某些实施例中,可以将触摸面板131与显示屏141集成而实现该显示设备的输入和输出功能。
传感器150可以包括一个或多个传感器,用于为该显示设备提供各个方面的状态评估。其中,传感器150可以包括光传感器,该光传感器可用于在成像应用中使用,即成为相机或摄像头的组成部分。此外,传感器150还可以包括加速度传感器,陀螺仪传感器,磁传感器,压力传感器或温度传感器,通过传感器150可以检测到该显示设备的加速/减速、方位、打开/关闭状态,组件的相对定位,或该显示设备的温度变化等。
音频电路160、扬声器和麦克风可提供用户与该显示设备之间的音频接口。音频电路160可将接收到的音频数据转换后的电信号,传输到扬声器,由扬声器转换为声音信号输出;另一方面,麦克风将收集的声音信号转换为电信号,由音频电路160接收后转换为音频数据,再将音频数据输出至RF电路110以发送给比如另一手机,或者将音频数据输出至存储器120以便进一步处理。
处理器170是该显示设备的控制中心,利用各种接口和线路连接整个该显示设备的各个部分,通过运行或执行存储在存储器120内的软件程序和/或模块,以及调用存储在存储器120内的数据,执行该显示设备的各种功能和处理数据,从而对该显示设备进行整体监控。可选的,处理器170可包括一个或多个处理单元,该处理单元可以包括但不限于:中央处理器单元、通用处理器、数字信号处理器、神经网络处理器、图像处理单元、图像信号处理器、微控制器或微处理器等。进一步的,处理器170还可以包括其他硬件电路或加速器,如专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。可选的,处理器170也可以是实现计算功能的组合,例如包含一个或多个微处理器组合、数字信号处理器和微处理器的组合等。
该显示设备还可以包括给各个部件供电的电源180(比如电池)。电源180可以通过电源管理***与处理器170逻辑相连,从而通过电源管理***实现管理充电、放电、以及功耗管理等功能。
尽管未示出,该显示设备还可以包括无线保真(wireless fidelity,WiFi)模块、蓝牙模块等,本申请实施例在此不再赘述。本领域技术人员可以理解,图1中示出的该显示设备结构并不构成对该显示设备的限定,可以包括比图示更多或更少的部件,或者组合某些部
件,或者不同的部件布置。
在本申请实施例中,上述显示单元140中的显示屏141可以为有机电激光显示(organic light-emitting,OLED)屏。可选的,该OLED屏包括但不限于:低温多晶氧化物(low temperature polycrystalline oxide,LTPO)显示屏,低温多晶硅(low temperature poly-silico,LTPS)显示屏。在实际应用中,上述显示单元140还可以包括用于驱动该OLED屏的显示驱动集成电路(display driver integrated chip,DDIC)。示例性的,如图2所示,该OLED屏可以包括多个像素电路,该DDIC可以包括多个驱动电路,该多个驱动电路与该多个像素电路一一对应耦合,一个驱动电路对应的像素电路可用于驱动对应耦合的像素电路,即用于为该像素电路提供驱动信号DA。
进一步的,该像素电路可以采用7T1C的结构来实现。示例性的,如图3所示,该7T1C的像素电路包括:晶体管T1至T6、数据薄膜晶体管DTFT、电容C和发光二极管D。其中,晶体管T4的漏极(drain)、晶体管T5的漏极和数据薄膜晶体管DTFT的源极(source)耦合于节点B;电容C的一端和晶体管T5的源极耦合于第一电源端VDD;电容C的另一端、数据薄膜晶体管DTFT的栅极(gate)和晶体管T3的漏极、晶体管T1的漏极耦合于节点A;数据薄膜晶体管DTFT的漏极、晶体管T3的源极、晶体管T2的源极和发光二极管D的一端相耦合,发光二极管D的另一端与第二电源端VSS耦合。晶体管T4的源极用于接收驱动信号DA、栅极用于接收控制信号pSn;晶体管T1的源极用于接收第一电压Vin1、栅极用于接收复位控制信号nSn-1;晶体管T2的漏极用于接收第二电压Vin2、栅极用于接收控制信号pSn-1;晶体管T3的栅极用于接收控制信号nSn,晶体管T5的栅极和晶体管T6的栅极用于接收发光控制信号EM。
具体的,在初始化阶段,晶体管T1导通,初始化节点A的电压;在充电阶段,晶体管T3和T4导通,数据薄膜晶体管DTFT导通,通过晶体管T4的源极为晶体管T3和数据薄膜晶体管DTFT充电,之后晶体管T2导通,以清除发光二极管D中的电压;在该像素电路的刷新阶段,晶体管T5和T6导通,通过数据薄膜晶体管DTFT驱动发光二极管D发光显示;在该像素电路的保持阶段的第一子阶段,晶体管T4导通,通过晶体管T4的源极为节点B提供电压;在该像素电路的保持阶段的第二子阶段,晶体管T5和T6导通,数据薄膜晶体管DTFT放电保持发光二极管D发光。上述刷新阶段也可以称为数据写入帧,上述保持阶段也可以称为保持帧或者休止帧。
根据上述内容可知,当该像素电路处于刷新阶段和保持阶段时,该像素电路中的DTFT一直处于导通状态,这样该DTFT的体内载流子会被界面缺陷捕获,使得参与导电的载流子数量下降,从而导致该DTFT的驱动电流逐渐变小,转移特性曲线表现为阈值电压负漂移。图4示出了该DTFT的转移特性曲线随着时间t变化的示意图,横坐标表示该DTFT的栅源电压VGS,纵坐标表示流过该DTFT的电流I。此外,上述驱动电流变小还会导致发光二极管D的亮度降低,尤其对于支持极致低帧率的显示屏(比如,LTPO显示屏),长时间处于保持阶段会让发光二极管D的亮度降低到被人眼发现,从而出现低帧率闪烁问题。
针对上述技术问题,相关技术中通常通过如下两种方案激发该DTFT中被界面缺陷捕获的载流子,以恢复该DTFT的驱动电流,下面对这两种方案进行介绍说明。
第一种方案,通过分时复用像素电路中晶体管T4的方式,来激发该DTFT的载流子。
具体的,在该像素电路的刷新阶段,该晶体管T4的源极用于接收DDIC中该像素电路对应的驱动电路提供的数据电压,该数据电压用于刷新该像素电路;在该像素电路的刷新阶段,该晶体管T4的源极用于接收该像素电路对应的驱动电路提供的激发电压,该激发电压用于激发该像素电路中DTFT的载流子。但是,对于该OLED屏中的多个像素电路,该方案需要DDIC中对应的多个驱动电路在刷新阶段和保持阶段均处于工作状态,而该多个驱动电路原本在保持阶段是不工作的(即该多个驱动电路可以处于关闭状态),这样会导致DDIC的大大功耗增加。
第二种方案,通过新增晶体管T8来激发该DTFT的载流子。具体的,结合图3,如图5所示,该像素电路还包括晶体管T8,该晶体管T8的源极耦合于节点B,该晶体管T8的栅极用于接收控制信号pS2,该晶体管T8的漏极用于接收第三输入电压Vin3。在该像素电路的刷新阶段,该晶体管T8关断,该晶体管T4的源极用于接收DDIC中该像素电路对应的驱动电路提供的数据电压,该数据电压用于刷新该像素电路;在该像素电路的刷新阶段,该晶体管T4关断,该晶体管T8的源极用于接收激发电压,该激发电压用于激发该像素电路中DTFT的载流子。但是,该方案需要在该OLED屏的每个像素电路中均增加晶体管T8,从而需要对现有的产品进行升级,且会带来较高的成本。
基于此,本申请实施例在不改变该OLED屏的像素电路的结构的基础上,提供了一种显示驱动电路,该显示驱动电路可以在该OLED屏的刷新阶段提供数据电压,在该OLED屏的保持阶段提供激发电压,且与上述两种方案相比,能够在不增加该OLED屏的成本的前提下,通过较小的功耗激发该OLED屏的多个像素电路中的DTFT的载流子。
本申请实施例提供一种显示驱动电路,该显示驱动电路可用于驱动OLED屏,该OLED屏可以为LTPO显示屏或LTPS显示屏。如图6所示,该OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧。该显示驱动电路用于在该数据写入帧提供数据信号、在该保持帧提供保持电压。其中,该显示驱动电路包括多个数据通道,该OLED屏包括多个像素电路,比如,该多个像素电路可以包括1280个像素电路或2560个像素电路。该多个数据通道用于以一一对应的方式为该多个像素电路提供数据信号;该显示驱动电路还包括电压保持通道,该电压保持通道用于为该多个像素电路提供保持电压。该显示驱动电路还包括多个屏驱动开关与该多个像素电路一一对应设置,其中每个屏驱动开关用于为对应的像素电路选择提供该数据信号和该保持电压。可选的,每个数据通道中可以包括一个驱动电路。
下面通过图7为该显示驱动电路的结构进行介绍说明。如图7所示,该显示驱动电路包括:第一数据通道10和电压保持通道20,第一数据通道10的输出端和电压保持通道20的输出端均用于耦合该OLED屏中的第一像素电路Pix1。
第一数据通道10用于:为第一像素电路Pix1提供第一数据信号,第一数据信号用于刷新第一像素电路Pix1,比如,在第一像素电路Pix1的数据写入帧输出第一数据信号,第一数据信号可以为第一数据电压。其中,第一数据通道10是该显示驱动电路中与第一像素电路Pix1对应的数据通道。
电压保持通道20用于:为第一像素电路Pix1提供第一保持电压,第一保持电压用于激发第一像素电路Pix1,比如,在第一像素电路Pix1的保持帧输出第一保持电压,第一保持电压可用于激发第一像素电路Pix1中的驱动薄膜晶体管DTFT的载流子,以提高驱动电
流。
其中,第一保持电压可以是固定电压,即第一保持电压的电压值可以是固定的,具体电压值的大小可以根据实际情况进行设置,只需保证第一保持电压能够激发DTFT中的载流子即可,本申请实施例对第一保持电压的电压值不作具体限制。
具体的,在第一像素电路Pix1的数据写入帧,电压保持通道20可处于关闭状态,第一数据通道10处于工作状态且可用于输出第一数据信号,第一数据信号可用于刷新第一像素电路Pix1。在第一像素电路Pix1的保持帧,第一数据通道10可处于关闭状态,电压保持通道20处于工作状态且可用于输出第一保持电压,第一保持电压可用于激发第一像素电路Pix1中的第一DTFT,即激发第一DTFT中被界面缺陷捕获的载流子,以恢复第一DTFT的驱动电流。
进一步的,如图7所示,该OLED屏还可以包括第二像素电路Pix2,电压保持通道20的输出端还用于耦合第二像素电路Pix2。即电压保持通道20的输出端可同时与第一像素电路Pix1和第二像素电路Pix2耦合。
电压保持通道20还用于:为第二像素电路Pix2提供第二保持电压,第二保持电压用于激发第二像素电路Pix2,比如,在第二像素电路Pix2的保持帧输出第二保持电压,以通过第二保持电压激发第二像素电路Pix2中的第二DTFT,即激发第二DTFT中被界面缺陷捕获的载流子,以恢复第二DTFT的驱动电流。其中,第二保持电压可以是固定电压,第二保持电压可以与第一保持电压相等。
可选的,当该OLED屏还包括更多数量的其它像素电路时,电压保持通道20还可用于在该其它像素电路的保持帧,对应输出用于激发该其它像素电路中的DTFT的保持电压。也即是,该显示驱动电路可通过一个电压保持通道20激发该OLED屏的多个像素点电路中的DTFT,从而能够在不改变该OLED屏中像素电路的结构的前提下,通过较小的功耗激发该OLED屏的多个像素电路中的DTFT的载流子。
此外,该显示驱动电路中还可以包括:与第二像素电路Pix2对应的第二数据通道30,第二数据通道30可用于为第二像素电路Pix2提供第二数据信号,第二数据信号用于刷新第二像素电路Pix2,比如,在第二像素电路Pix2的数据写入帧输出第二数据信号。第二数据信号可以为第二数据电压。
此外,该显示驱动电路还可以包括第一屏驱动开关SW1,第一屏驱动开关SW1的选择端用于与第一数据通道10的输出端或电压保持通道20的输出端耦合,第一屏驱动开关SW1的固定端用于耦合第一像素电路Pix1。第一屏驱动开关SW1用于:选通第一数据通道10,或者选通电压保持通道20。示例性的,第一屏驱动开关SW1用于:在第一像素电路Pix1的数据写入帧选通第一数据通道10,以使第一数据通道10在第一像素电路Pix1的数据写入帧向第一像素电路Pix1输出第一数据信号;在第一像素电路Pix1的保持帧选通电压保持通道20,以使电压保持通道20在第一像素电路Pix1的保持帧向第一像素电路Pix1输出保持电压。
类似的,当该OLED屏还包括第二像素电路Pix2时,该显示驱动电路还可以包括第二屏驱动开关SW2,第二屏驱动开关SW2的固定端可用于耦合第二像素电路Pix2,第二屏驱动开关SW2的选择端可用于耦合第二数据通道30的输出端或者电压保持通道20的输出端。进一步的,当该OLED屏还包括更多数量的其它像素电路时,该显示驱动电路还
可以包括更多数量的其它屏驱动开关SW,每个屏驱动开关SW的固定端可用于耦合对应的像素电路,每个屏驱动开关SW的选择端可用于耦合对应的驱动电路的输出端或者电压保持通道20的输出端。
进一步,上述电压保持通道20可以通过多种不同的方式实现,比如,在该显示驱动电路中额外增加电压保持通道20,或者复用该显示驱动电路中与像素电路对应的数据通道作为电压保持通道20。
第一种方式,在该显示驱动电路中额外增加电压保持通道20。
在一种可能的实施例中,如图8所示,电压保持通道20包括低压差线性稳压器(low dropout regulator,LDO),该LDO可用于为每个像素电路提供一个保持电压,即该LDO可同时激发该OLED屏中的多个像素电路。在另一种可能的实施例中,如图9所示,电压保持通道20包括专用驱动电路,该专用驱动电路可用于为每个像素电路提供一个保持电压,即电压保持通道20可以是专门设计的用于输出上述保持电压的驱动电路。上述图8和图9中,以该多个像素电路包括2560个像素电路(图中仅示出了一个晶体管),该显示驱动电路包括与该多个像素电路一一对应的2560个数据通道、以及一个新增的电压保持通道20为例进行说明。
第二种方式,该显示驱动电路的多个数据通道中的每个数据通道包括一个驱动电路,该电压保持通道20复用部分数据通道中的驱动电路。
在一种可能的实施例中,如图10所示,该电压保持通道20复用一个数据通道中的驱动电路(即复用一个驱动电路)。此时,该驱动电路可包括两个输出端,一个输出端可用于与对应的像素电路耦合,以向该像素电路输出数据电压,另一个输出端可用于与该OLED屏中的多个像素电路耦合,以为该多个像素电路提供保持电压。在一种可能的实施例中,如图11所示,电压保持通道20复用至少两个数据通道中的驱动电路,即复用至少两个驱动电路。此时,该至少两个驱动电路中的每个驱动电路可包括两个输出端,一个输出端可用于与对应的像素电路耦合,以向该像素电路输出数据电压,另一个输出端可用于与该OLED屏中的多个像素电路中的部分像素电路耦合,以为该部分像素电路提供保持电压。也即是,该至少两个驱动电路分散地为该多个像素电路中的不同像素电路提供保持电压。上述图10和图11中,以该多个像素电路包括2560个像素电路(图中仅示出了一个晶体管),该显示驱动电路包括与该多个像素电路一一对应的2560个驱动电路为例进行说明。图10中以电压保持通道20复用的驱动电路为第1280驱动电路,图11中以至少两个电压保持通道20复用的驱动电路包括第1280和第1281驱动电路为例进行说明。
关于上文中的LDO、专用驱动电路、以及与像素电路对应的驱动电路的具体结构和工作原理可以参考现有技术中的描述,本申请实施例在此不再赘述。
本申请实施例提供的显示驱动电路,能够在不改变该OLED屏的像素电路的结构的基础上,在该OLED屏的数据写入帧提供数据信号,在该OLED屏的保持帧提供保持电压,且与上述相关技术中的两种方案相比,能够在不增加该OLED屏的成本的前提下,通过较小的功耗激发该OLED屏的多个像素电路中的DTFT的载流子。即本申请实施例提供的方案与上述相关技术中的两种方案相比,能够有效降低该OLED屏的成本和该显示驱动电路的功耗。
基于此,本申请实施例还提供一种OLED屏,OLED屏用于工作在多个刷屏频率周期,
其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧,该OLED屏用于在该数据写入帧接收显示驱动电路提供的数据信号、在该保持帧接收显示驱动电路提供的保持电压;该OLED屏包括多个像素电路;该多个像素电路,分别用于接收该显示驱动电路的多个数据通道以一一对应的方式提供的数据信号;该多个像素电路,还用于接收该显示驱动电路电压保持通道提供的保持电压;其中,每个像素电路接收的该数据信号和该保持电压是由该显示驱动电路中与该像素电路对应的屏驱动开关选择的。
在一种可能的实施例中,该像素电路包括:第一晶体管、第二晶体管、第三晶体管、第四晶体管、第五晶体管、第六晶体管、数据薄膜晶体管、电容和发光二极管;其中,第一晶体管的一极耦合于第一节点,该电容耦合在第一节点与电源端之间,第四晶体管的一极耦合于第二节点,第五晶体管耦合在该电源端与第二节点之间,第三晶体管耦合在第一节点与第三节点之间,该数据薄膜晶体管耦合在第二节点与第三节点之间,该数据薄膜晶体管的控制端耦合于第一节点,第二晶体管的一极、第六晶体管的一极和该发光二极管的一极耦合,第六晶体管的另一极耦合于第三节点。
本申请实施例还提供一种显示驱动集成电路,该显示驱动集成电路包括本申请实施例所提供的任意一种显示驱动电路,比如,该显示驱动电路可以为图7-图11中的任一图示所提供的显示驱动电路。关于该显示驱动电路的相关描述,具体参见上文中的描述,本申请实施例在此不再赘述。
本申请实施例还提供一种显示驱动电路的控制方法,该显示驱动电路用于驱动OLED屏,用于驱动有机电激光显示OLED屏,该OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,该数据写入帧以后配置有该多个保持帧,该显示驱动电路用于在该数据写入帧提供数据信号、在该保持帧提供保持电压,该显示驱动电路包括多个数据通道、电压保持通道和多个屏驱动开关,该显示OLED屏包括多个像素电路,多个屏驱动开关与该多个像素电路一一对应设置;该方法包括:该多个数据通道以一一对应的方式为该多个像素电路提供数据信号;该电压保持通道为该多个像素电路提供保持电压;该多个屏驱动开关中的每个屏驱动开关为对应的像素电路选择提供该数据信号和该保持电压。
可选的,该多个像素电路包括1280个像素电路或2560个像素电路。
在一种可能的实施例中,该电压保持通道包括低压差线性稳压器LDO,该电压保持通道为该多个像素电路提供保持电压,包括:该LDO为该多个像素电路中的每个像素电路提供一个该保持电压。
在另一种可能的实施例中,该电压保持通道包括专用驱动电路,该电压保持通道为该多个像素电路提供保持电压,包括:该专用驱动电路为该多个像素电路中的每个像素电路提供一个该保持电压。
在又一种可能的实施例中,该多个数据通道中的每个数据通道包括一个驱动电路,该电压保持通道复用部分数据通道中的驱动电路,该电压保持通道为该多个像素电路提供保持电压,包括:复用的驱动电路为该多个像素电路中的每个像素电路提供一个该保持电压。
可选的,该OLED屏为低温多晶氧化物LTPO显示屏。
在本申请实施例中,该控制方法能够在不改变该OLED屏的像素电路的结构的基础上,
控制显示驱动电路在该OLED屏的数据写入帧提供数据电压,在该OLED屏的保持帧提供激发电压,且与上述相关技术中的两种方案相比,能够在不增加该OLED屏的成本的前提下,通过较小的功耗激发该OLED屏的多个像素电路中的DTFT的载流子。
在本申请的另一方面,还提供一种显示设备,如图12所示,该显示设备包括:OLED屏、以及与该OLED屏耦合的显示驱动集成电路DDIC,该DDIC中包括显示驱动电路,该显示驱动电路用于驱动该OLED屏,该显示驱动电路可以为本申请实施例所提供的任意一种显示驱动电路。
上述关于显示驱动电路的详细描述均可对应援引到该显示驱动集成电路、该显示驱动电路的控制方法、以及该显示设备中,本申请实施例在此不再赘述。本申请实施例提供的各个电路、控制方法和设备,均包含上述实施例中显示驱动电路的功能,因此可以达到与上述显示驱动电路相同的效果。
最后应说明的是:以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何在本申请揭露的技术范围内的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。
Claims (16)
- 一种显示驱动电路,其特征在于,用于驱动有机电激光显示OLED屏,所述OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,所述数据写入帧以后配置有所述多个保持帧,所述显示驱动电路用于在所述数据写入帧提供数据信号、在所述保持帧提供保持电压;所述显示驱动电路包括多个数据通道,所述OLED屏包括多个像素电路;其中,所述多个数据通道用于以一一对应的方式为所述多个像素电路提供数据信号;所述显示驱动电路还包括电压保持通道,所述电压保持通道用于为所述多个像素电路提供保持电压;所述显示驱动电路还包括多个屏驱动开关与所述多个像素电路一一对应设置,其中每个屏驱动开关用于为对应的像素电路选择提供所述数据信号和所述保持电压。
- 根据权利要求1所述的显示驱动电路,其特征在于,所述电压保持通道包括低压差线性稳压器LDO,所述LDO用于为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求1所述的显示驱动电路,其特征在于,所述电压保持通道包括专用驱动电路,所述专用驱动电路用于为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求1所述的显示驱动电路,其特征在于,所述多个数据通道中的每个数据通道包括一个驱动电路,所述电压保持通道复用部分数据通道中的驱动电路,复用的驱动电路用于为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求1-4任一项所述的显示驱动电路,其特征在于,所述多个像素电路包括1280个像素电路或2560个像素电路。
- 根据权利要求1-5任一项所述的显示驱动电路,其特征在于,所述OLED屏为低温多晶氧化物LTPO显示屏。
- 一种显示驱动集成电路,其特征在于,所述显示驱动集成电路包括如权利要求1-6任一项所述的显示驱动电路。
- 一种有机电激光显示OLED屏,其特征在于,所述OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,所述数据写入帧以后配置有所述多个保持帧,所述OLED屏用于在所述数据写入帧接收显示驱动电路提供的数据信号、在所述保持帧接收显示驱动电路提供的保持电压;所述OLED屏包括多个像素电路;所述多个像素电路,分别用于接收所述显示驱动电路的多个数据通道以一一对应的方式提供的数据信号;所述多个像素电路,还用于接收所述显示驱动电路电压保持通道提供的保持电压;其中,每个像素电路接收的所述数据信号和所述保持电压是由所述显示驱动电路中与所述像素电路对应的屏驱动开关选择的。
- 根据权利要求8所述的OLED屏,其特征在于,所述像素电路包括:第一晶体管、第二晶体管、第三晶体管、第四晶体管、第五晶体管、第六晶体管、数据薄膜晶体管、电容和发光二极管;其中,所述第一晶体管的一极耦合于第一节点,所述电容耦合在所述第一节点与电源端之间,所述第四晶体管的一极耦合于第二节点,所述第四晶体管的另一极用于接收所述数据信号和所述保持电压,所述第五晶体管耦合在所述电源端与所述第二节点之间,所述第三晶体管耦合在所述第一节点与第三节点之间,所述数据薄膜晶体管耦合在所述第二节点与所述第三节点之间,所述数据薄膜晶体管的控制端耦合于所述第一节点,所述第二晶体管的一极、所述第六晶体管的一极和所述发光二极管的一极耦合,所述第六晶体管的另一极耦合于所述第三节点。
- 一种显示设备,其特征在于,所述显示设备包括:有机电激光显示OLED屏、以及如权利要求1-6任一项所述的显示驱动电路,或者,如权利要求7所述的显示驱动集成电路,所述显示驱动电路或所述显示驱动集成电路用于驱动所述OLED屏。
- 一种显示驱动电路的控制方法,其特征在于,用于驱动有机电激光显示OLED屏,所述OLED屏用于工作在多个刷屏频率周期,其中每个刷新频率周期包括一个数据写入帧和多个保持帧,所述数据写入帧以后配置有所述多个保持帧,所述显示驱动电路用于在所述数据写入帧提供数据信号、在所述保持帧提供保持电压,所述显示驱动电路包括多个数据通道、电压保持通道和多个屏驱动开关,所述显示OLED屏包括多个像素电路,多个屏驱动开关与所述多个像素电路一一对应设置;所述方法包括:所述多个数据通道以一一对应的方式为所述多个像素电路提供数据信号;所述电压保持通道为所述多个像素电路提供保持电压;所述多个屏驱动开关中的每个屏驱动开关为对应的像素电路选择提供所述数据信号和所述保持电压。
- 根据权利要求11所述的方法,其特征在于,所述电压保持通道包括低压差线性稳压器LDO,所述电压保持通道为所述多个像素电路提供保持电压,包括:所述LDO为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求11所述的方法,其特征在于,所述电压保持通道包括专用驱动电路,所述电压保持通道为所述多个像素电路提供保持电压,包括:所述专用驱动电路为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求11所述的方法,其特征在于,所述多个数据通道中的每个数据通道包括一个驱动电路,所述电压保持通道复用部分数据通道中的驱动电路,所述电压保持通道为所述多个像素电路提供保持电压,包括:复用的驱动电路为所述多个像素电路中的每个像素电路提供一个所述保持电压。
- 根据权利要求11-14任一项所述的方法,其特征在于,所述多个像素电路包括1280个像素电路或2560个像素电路。
- 根据权利要求11-15任一项所述的方法,其特征在于,所述OLED屏为低温多晶氧化物LTPO显示屏。
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Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170092178A1 (en) * | 2015-09-30 | 2017-03-30 | Lg Display Co., Ltd. | Display device and method of driving the same |
US20190057646A1 (en) * | 2017-08-17 | 2019-02-21 | Apple Inc. | Electronic Devices With Low Refresh Rate Display Pixels |
US20200111418A1 (en) * | 2018-10-04 | 2020-04-09 | Samsung Display Co., Ltd. | Display apparatus and method of driving display panel using the same |
US20200294451A1 (en) * | 2019-03-15 | 2020-09-17 | Samsung Display Co., Ltd. | Display device and method of driving the same |
US20200394961A1 (en) * | 2019-06-12 | 2020-12-17 | Samsung Display Co., Ltd. | Display device |
US20210201798A1 (en) * | 2019-12-27 | 2021-07-01 | Lg Display Co., Ltd. | Organic Light Emitting Display Device and Driving Method Thereof |
US20210327352A1 (en) * | 2020-12-31 | 2021-10-21 | Shanghai Tianma AM-OLED Co., Ltd. | Display panel, driving method and display device |
US20210375214A1 (en) * | 2020-05-27 | 2021-12-02 | Samsung Display Co., Ltd. | Display device |
CN113763888A (zh) * | 2021-09-13 | 2021-12-07 | 厦门天马显示科技有限公司 | 显示面板及显示装置 |
CN114038429A (zh) * | 2021-11-24 | 2022-02-11 | 京东方科技集团股份有限公司 | 显示面板及驱动方法、显示装置 |
-
2023
- 2023-06-09 WO PCT/CN2023/099465 patent/WO2024007818A1/zh unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170092178A1 (en) * | 2015-09-30 | 2017-03-30 | Lg Display Co., Ltd. | Display device and method of driving the same |
US20190057646A1 (en) * | 2017-08-17 | 2019-02-21 | Apple Inc. | Electronic Devices With Low Refresh Rate Display Pixels |
US20200111418A1 (en) * | 2018-10-04 | 2020-04-09 | Samsung Display Co., Ltd. | Display apparatus and method of driving display panel using the same |
US20200294451A1 (en) * | 2019-03-15 | 2020-09-17 | Samsung Display Co., Ltd. | Display device and method of driving the same |
US20200394961A1 (en) * | 2019-06-12 | 2020-12-17 | Samsung Display Co., Ltd. | Display device |
US20210201798A1 (en) * | 2019-12-27 | 2021-07-01 | Lg Display Co., Ltd. | Organic Light Emitting Display Device and Driving Method Thereof |
US20210375214A1 (en) * | 2020-05-27 | 2021-12-02 | Samsung Display Co., Ltd. | Display device |
US20210327352A1 (en) * | 2020-12-31 | 2021-10-21 | Shanghai Tianma AM-OLED Co., Ltd. | Display panel, driving method and display device |
CN113763888A (zh) * | 2021-09-13 | 2021-12-07 | 厦门天马显示科技有限公司 | 显示面板及显示装置 |
CN114038429A (zh) * | 2021-11-24 | 2022-02-11 | 京东方科技集团股份有限公司 | 显示面板及驱动方法、显示装置 |
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