CN118538166A - Display panel, driving method thereof, and display device - Google Patents
Display panel, driving method thereof, and display device Download PDFInfo
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- CN118538166A CN118538166A CN202410663627.9A CN202410663627A CN118538166A CN 118538166 A CN118538166 A CN 118538166A CN 202410663627 A CN202410663627 A CN 202410663627A CN 118538166 A CN118538166 A CN 118538166A
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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]
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
本发明提供一种显示面板及其驱动方法和显示装置。该显示面板包括：触控显示集成电路、第一电源和第二电源，触控显示集成电路包括模拟驱动电路，模拟驱动电路包括触控驱动电路和显示驱动电路；第一电源电连接触控驱动电路和显示驱动电路，被配置为向触控驱动电路和显示驱动电路提供电源；第二电源电连接显示驱动电路，被配置为向显示驱动电路提供电源；第二电源还电连接触控驱动电路，还被配置为向触控驱动电路提供电源。该显示面板不仅减少了触控显示集成电路的尺寸，而且降低了触控显示集成电路的成本。
The present invention provides a display panel, a driving method thereof and a display device. The display panel includes: a touch display integrated circuit, a first power supply and a second power supply, the touch display integrated circuit includes an analog driving circuit, the analog driving circuit includes a touch driving circuit and a display driving circuit; the first power supply is electrically connected to the touch driving circuit and the display driving circuit, and is configured to provide power to the touch driving circuit and the display driving circuit; the second power supply is electrically connected to the display driving circuit, and is configured to provide power to the display driving circuit; the second power supply is also electrically connected to the touch driving circuit, and is also configured to provide power to the touch driving circuit. The display panel not only reduces the size of the touch display integrated circuit, but also reduces the cost of the touch display integrated circuit.
Description
Technical Field
The invention belongs to the field of display, and particularly relates to a display panel, a driving method thereof and a display device.
Background
With the continuous development of display technology, touch display devices have been widely used. Currently, a Touch panel and a display panel in a Touch display device are independently controlled by two chips, and TDDI (Touch AND DISPLAY DRIVER Integration, touch and display driving Integration) chips are generated to improve the Integration level of the Touch display device.
Disclosure of Invention
The invention provides a display panel, a driving method thereof and a display device. The display panel not only reduces the size of the touch display integrated circuit, but also reduces the cost of the touch display integrated circuit.
The present invention provides a display panel, comprising: the touch display integrated circuit, a first power supply and a second power supply,
The touch display integrated circuit includes an analog driving circuit,
The analog driving circuit comprises a touch driving circuit and a display driving circuit;
The first power supply is electrically connected with the touch control driving circuit and the display driving circuit and is configured to provide power for the touch control driving circuit and the display driving circuit;
The second power supply is electrically connected with the display driving circuit and is configured to provide power for the display driving circuit;
The second power supply is further electrically connected to the touch driving circuit and is further configured to provide power to the touch driving circuit.
In some embodiments, a first switch is also included,
The first switch is electrically connected between the second power supply and the touch control driving circuit and/or between the second power supply and the display driving circuit.
In some embodiments, a second switch is also included,
The second switch is electrically connected between the first power supply and the touch control driving circuit and/or between the first power supply and the display driving circuit.
In some embodiments, the analog drive circuit further includes a common circuit,
The first power supply is also electrically connected to the common circuit.
In some embodiments, the touch drive circuit includes front-end processing circuitry and back-end drive circuitry,
The first power supply is electrically connected with the front-end processing circuit and the rear-end driving circuit;
The second power supply is electrically connected with the rear end driving circuit.
In some embodiments, the first power source and the second power source each comprise a regulated dc power source;
The output voltage range of the first power supply is 2.8-4V;
the output voltage range of the second power supply is 7-8V.
In some embodiments, the first power supply and the second power supply provide voltages to the back-end drive circuit comprising:
0～3V、0～7.6V、-7.6V～3V、-7.6V～7.6V。
in some embodiments, a third power supply and a fourth power supply are also included,
The touch display integrated circuit also comprises an input-output interface circuit and a logic control circuit,
The third power supply is electrically connected with the input/output interface circuit, the logic control circuit and the shared circuit;
the fourth power supply is electrically connected with the input/output interface circuit.
In some embodiments, a third switch is also included,
The third switch is electrically connected between the third power supply and the touch control driving circuit and/or between the third power supply and the display driving circuit.
In some embodiments, the third power supply and the fourth power supply each comprise a regulated dc power supply;
The output voltage range of the third power supply is 1.8-2.5V;
the output voltage range of the fourth power supply is 1.2-2V.
The invention also provides a display device comprising the display panel.
The invention also provides a driving method of the display panel, which comprises the following steps: in the display-on phase of the display panel,
When the display panel is in a touch state, the second power supply supplies power for touch driving of the display panel;
When the display panel is in the touch idle state, the second power supply provides power for touch driving of the display panel, or the first power supply provides power for touch driving of the display panel.
In some embodiments, further comprising: in the display closing stage of the display panel, the display panel is in the touch idle state, and the second power supply provides power for touch driving of the display panel or the first power supply provides power for touch driving of the display panel.
In some embodiments, the second power supply supplies power to a display drive of the display panel during the display on phase of the display panel.
In some embodiments, the second power supply stops supplying power to the display driving of the display panel during a display off period of the display panel.
The invention has the beneficial effects that: according to the display panel provided by the invention, on the basis that the first power supply can provide power for the touch driving circuit in the touch display integrated circuit, the second power supply can also provide power for the touch driving circuit, compared with the configuration of capacitance components in the mutual capacitance TDDI chip VR40 applied to OLED touch display products in the related technology, the configuration of one charge pump can be reduced in the touch display integrated circuit in the embodiment, so that the configuration of one flying capacitor and one filter capacitor can be reduced, the size of the touch display integrated circuit is further reduced, and the cost of the touch display integrated circuit is reduced; for a display panel of about 7 inches, the scheme of supplying power by the first power supply and the second power supply in this embodiment can reduce the size of the touch display integrated circuit by about 6%, and reduce the cost of the touch display integrated circuit by about 6%.
The display device provided by the invention can reduce the size of the display device and the cost of the display device by adopting the display panel.
Drawings
Fig. 1a is a schematic plan view of a circuit distribution in a chip VR40 of a related art mutual capacitance TDDI;
fig. 1b is a schematic diagram of a power supply of a related art mutually compatible TDDI chip VR 40;
FIG. 1c is a schematic diagram of the power supply potential of a related art capacitor TDDI chip VR 40;
Fig. 2a is a schematic diagram of a power supply of a touch display integrated circuit in a display panel according to an embodiment of the invention;
FIG. 2b is a schematic diagram showing the power supply potential of the touch display integrated circuit in the display panel according to the embodiment of the invention;
FIG. 2c is a schematic block diagram of a touch display integrated circuit in a display panel according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a power-on sequence of a touch display integrated circuit in a display panel according to an embodiment of the invention.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, a display panel, a driving method thereof and a display device thereof are described in further detail below with reference to the accompanying drawings and detailed description.
In related art, in an LCD (Liquid CRYSTAL DISPLAY ) product, as TDDI (Touch AND DISPLAY DRIVER Integration, touch and display driving integrated chip) technical scheme can reduce the Mask (Mask plate) layer number in the preparation process of the LCD Touch display panel and save one FPC (flexible circuit board), the cost of the LCD Touch display panel is reduced as a whole, so the TDDI technical scheme in the LCD product has been widely popularized.
At present, an OLED (Organic Light-Emitting Diode) touch display screen gradually occupies the mobile phone market, and because the OLED touch display screen displays high-quality pictures, the OLED touch display screen can more satisfy the requirements of consumers, so that the OLED touch display screen is increasingly applied to touch display products.
Referring to TDDI technology scheme of LCD product, a pure self-contained OLED TDDI chip (28 nm process, i.e. 28nm chip process capability) is provided in the related art. However, as the purely self-contained OLED TDDI chip technical scheme cannot bring the advantages of Mask reduction and FPC reduction to the OLED touch display panel like the LCD TDDI technical scheme, on the contrary, the purely self-contained OLED TDDI chip Wafer Size (Wafer Size) is too large, so that the cost is far greater than that of the technical scheme of display driving chip (DIC) +touch driving chip (TIC) in the OLED touch display panel (i.e., DIC and TIC are respectively and independently set); the comprehensive cost performance of the self-contained OLED TDDI chip is very low, so that the technical scheme of the self-contained OLED TDDI chip is not promoted.
Currently, TDDI technology suitable for application to an OLED touch display panel is the mutual capacitance TDDI technology.
In the related art, a mutual capacitance TDDI chip VR40 (28 nm process) suitable for Mobile OLED touch display products is provided, as shown in fig. 1a, GPO, MIPI, I/O is an input/output interface circuit; SRAM and Memory are Memory circuits; OTP is software or program; logic is a Logic circuit; source and Gamma are display drive circuit portions; touch RX and TX are Touch drive circuit parts; POWER is the POWER supply circuit. The wafer size of the mutual capacitance TDDI chip is 32920×1617μm 2, and the area ratio of the Touch driving (Touch) portion of the mutual capacitance TDDI chip VR40 is 17.75% (i.e., 32920×287 μm 2). Because the mutual capacitance TDDI chip adopts a 28nm node process, the cost of the Touch drive (Touch) part in the mutual capacitance TDDI chip is calculated to be approximately equal to the cost of the externally hung Touch drive chip. An externally hung touch driving chip, such as a touch driving chip (TIC) FMLOC, FMLOC refers to a touch structure layer arrangement scheme in which a touch structure layer is directly fabricated on a stacked light emitting structure layer and packaging layer.
For best cost performance, TDDI chip VR40 has reduced the design of the Touch drive (Touch) portion on the wafer to the greatest extent, and the basic design specification parameters of the Touch drive (Touch) portion are shown in table 1 below.
TABLE 1
In table 1, PNL Size: a panel size; load: a capacitive load; channel: a channel; reporting Rate: reporting the point rate; APL: accuracy, precision Accuracy, linearity; features: features; proximity: proximity sensing; ACTIVE PEN: an active pen; touch I/F: touch input/output interface.
As shown in fig. 1b, a schematic diagram of the power supply of TDDI chips VR40 is shown. The TDDI chip VR40 has four power supplies, i.e., a Host (e.g., a mobile phone) provides four power supplies to the TDDI chip VR 40: VDDIO, VDDI, VCI, AVDD.
Wherein, the voltage range of VDDIO is 1.2-1.8V, and the typical voltage of VDDIO is 1.85V. The VDDIO functions to be converted by the voltage conversion device into other stable dc voltages as needed to power the GPIO (general purpose digital input output interface). GPIO includes SPI communication interface (such as Sync synchronous signal interface, I2C signal interface, etc.), INT interrupt interface, reset interface, etc.
The voltage of VDDI was 1.8V. VDDI functions to be converted by the voltage conversion device into other stable dc voltages as needed, powering GPIO (general purpose digital input output interface) and Logic circuits. Logic circuits, also known as digital circuits, have functions such as data storage, computation, etc.
The voltage of VCI is 3.0V. The VCI functions to power the analog display driver circuit and the touch driver circuit.
The voltage of AVDD was 7.6V. The AVDD functions to power the analog display driver circuit.
In the related art, the supply potential of TDDI chip VR40 is shown in fig. 1 c. The high voltage is converted to a low voltage required by TDDI chips VR40 through a low dropout Linear Regulator (Linear Regulator), such as VGH 1/2, VINT_ P, ELVDD, VGMP, VGSP, VDD, VDDM, ELVSS, VINT _ N, VGL, VGL 1/2. The supply voltage is converted by a Charge Pump (voltage converter) to other voltages required by TDDI chip VR40, such as VGL, AVEE, VCL, VGH. Direct Supply represents voltage Direct Supply, such as AVDD, VCI, VDDI, VDDIO, AVEE, GND and the like; along the arrangement sequence of the direct supply voltages from top to bottom in fig. 1c, the potential of the direct supply voltages decreases in sequence. In fig. 1c, gamma, source, GOA is a circuit in the display driving circuit simulated in TDDI chip VR 40. Touch Drive is a circuit in a Touch Drive circuit simulated in TDDI chips VR 40; the AFE/ADC is an analog front-end circuit in TDDI chips VR40, and functions to process the front-end signals of the analog display driver circuit and the touch driver circuit. IO is an input-output circuit. Digital Logic (Memory) is a Logic circuit and a Memory circuit in TDDI chips VR40, etc.
The mutual capacitance TDDI chip (TDDI chip VR 40) suitable for the OLED touch display panel has insufficient cost performance, and currently, no mutual capacitance TDDI chip suitable for the OLED touch display panel has higher cost performance.
In order to solve the above-mentioned problems, an embodiment of the present invention provides a display panel, as shown in fig. 2a, 2b and 2c, including: a Touch display integrated circuit 1, a first power supply (VCI) 2, and a second power supply (AVDD) 3, the Touch display integrated circuit 1 including an Analog driving circuit (Analog) 11, the Analog driving circuit 11 including a Touch driving circuit (Touch) 111 and a display driving circuit (DDI) 112; the first power supply 2 is electrically connected to the touch drive circuit 111 and the display drive circuit 112, and configured to supply power to the touch drive circuit 111 and the display drive circuit 112; the second power supply 3 is electrically connected to the display driving circuit 112 and configured to supply power to the display driving circuit 112; the second power supply 3 is further electrically connected to the touch driving circuit 111 and is further configured to supply power to the touch driving circuit 111.
The Touch display integrated circuit 1 refers to a circuit (Touch AND DISPLAY DRIVER Integration, namely TDDI) integrated with a display driver in a display panel. The touch display integrated circuit 1 improves the integration level of the display panel, and simultaneously reduces the material cost and the preparation cost of the display panel.
In this embodiment, on the basis that the first power supply 2 can provide power for the touch driving circuit 111 in the touch display integrated circuit 1, by making the second power supply 3 also provide power for the touch driving circuit 111, compared with the configuration of capacitance components in the mutual capacitance TDDI chip VR40 applied to an OLED touch display product in the related art, the configuration of a Charge Pump (i.e. a capacitive voltage converter) can be reduced in the touch display integrated circuit 1 in this embodiment, so that the configuration of a flying capacitor and a filter capacitor can be reduced, and thus, not only the size of the touch display integrated circuit 1 but also the cost of the touch display integrated circuit 1 can be reduced; for a display panel of about 7 inches, the power supply scheme of the first power supply 2 and the second power supply 3 in this embodiment can reduce the size of the touch display integrated circuit 1 by about 6%, and reduce the cost of the touch display integrated circuit 1 by about 6%.
In some embodiments, as shown in fig. 2c, the display panel further includes a first Switch (Power Switch) 4, and the first Switch 4 is electrically connected between the second Power supply 3 and the touch driving circuit 111 and/or between the second Power supply 3 and the display driving circuit 112.
The first switch 4 may be used to turn on or off the electrical connection between the second power supply 3 and the touch driving circuit 111, and the first switch 4 may also be used to turn on or off the electrical connection between the second power supply 3 and the display driving circuit 112.
In some embodiments, as shown in fig. 2c, the display panel further includes a second switch 5, and the second switch 5 is electrically connected between the first power source 2 and the touch driving circuit 111 and/or between the first power source 2 and the display driving circuit 112.
In some embodiments, as shown in fig. 2c, in the Touch driving circuit (Touch portion) 111 in the Touch display integrated circuit 1, tx (0) -Tx (39) represent Touch driving signals; rx (0) -Rx (39) represent touch sensing signals; AFE represents an analog front-end circuit; global Tx control denotes Tx overall control; ADC represents an analog-to-digital conversion circuit; TPOSC denotes a touch crystal oscillator circuit; PWREST denotes a power supply reset circuit; power Management Unit denotes a power management circuit; MCU represents a main control circuit; IRQCTL denotes an interrupt registration circuit; IRQ represents an interrupt request; MST represents signal transmission; timer represents a clock circuit; host_int represents an interrupt with the Host. In a display driving circuit (Driver portion) 112 in the touch display integrated circuit 1, MIPIPHY represents a mode MIPI interface; MIPIPower supply denotes MIPI power supply; MIPI I/F represents an MIPI input/output interface (data transmission signals, currently, MIPI transmission is used for a display panel, and four pairs of differential signals are used for transmitting image data and one pair of differential clock signals during transmission); SPI I/F represents SPI communication bus input/output interface; index Register (IR) indicates a Register circuit; OTP represents a program or software; GAMMA represents a GAMMA circuit for driving display; source Driver represents Source drive, i.e., display data drive circuit; data Processor represents Data processing circuitry; GRAM/Demmura denotes a memory circuit; OSC represents a crystal oscillator circuit; the Timing/state controller represents a Timing controller; VCL CHARGE Pump represents a VCL voltage converter circuit; AVEE CHARGE Pump represents AVEE voltage converter circuitry; VGH AND VGL CHARGE Pump denotes VGH and VGL voltage converter circuits; GOA represents a gate driving circuit; DVDD regulator represents a DVDD voltage regulator; the regulator represents a voltage regulator.
In some embodiments, as shown in fig. 2a, the analog driving circuit 11 further comprises a common circuit (com.) 113, and the first power supply 2 is further electrically connected to the common circuit 113.
The common circuit 113 is some analog circuits that are common to the display driving circuit 112 and the touch driving circuit 111, for example: ESD (electrostatic discharge) circuits, OSC (crystal oscillator) circuits, common voltage circuits, and the like.
In some embodiments, as shown in fig. 2b, the Touch driving circuit 111 includes a front end processing circuit Touch AFE/ADC and a back end driving circuit Touch Drive, and the first power supply (VCI) 2 is electrically connected to the front end processing circuit Touch AFE/ADC and the back end driving circuit Touch Drive; the second power supply (AVDD) 3 is electrically connected to the back-end driving circuit Touch Drive.
In some embodiments, the function of the front-end processing circuit Touch AFE/ADC is to process the front-end signal of the back-end driving circuit Touch Drive, such as performing analog-to-digital conversion, amplification, providing a reference source, excitation, and the like on the front-end signal of the back-end driving circuit Touch Drive. The back-end driving circuit Touch driving is used for performing Touch driving, such as providing a Touch driving signal Tx.
In some embodiments, the first power source 2 and the second power source 3 each comprise a regulated dc power source; the output voltage range of the first power supply 2 is 2.8-4V; the output voltage of the second power supply 3 ranges from 7 to 8V.
In some embodiments, the output voltage of the first power supply 2 is 3.0V and the output voltage of the second power supply 3 is 7.6V.
In some embodiments, the first power supply 2 and the second power supply 3 provide the voltage to the back-end driving circuit Touch Drive includes: 0-3V, 0-7.6V, -7.6V-3V and-7.6V. I.e. the voltage gear of the back-end Drive circuit Touch Drive has a plurality of gear options as described above.
In some embodiments, the first power supply 2 and the second power supply 3 may provide voltages to the back-end driving circuit Touch Drive according to the specification requirement of the display panel on power consumption and mutual interference between the Touch layer and the display layer in the display panel, and the voltages provided to the back-end driving circuit Touch Drive should select a medium voltage with a small value under the condition of ensuring a sufficient Touch signal-to-noise ratio. Such as: if the Touch electrode of the display panel is designed as 1T1R (1T X1RX, i.e. one Touch driving electrode corresponds to one Touch sensing electrode) scheme, the load of the display panel is relatively large, and in order to ensure a high Touch signal-to-noise ratio (SNR), the voltage provided to the rear end driving circuit Touch driving is preferably-7.6V-3V or-7.6V. If the Touch electrode of the display panel is designed as a 2T1R (2T X1RX, i.e. two Touch driving electrodes correspond to one Touch sensing electrode) scheme, the load of the display panel is smaller, and even if a power supply scheme of a rear end driving circuit Touch driving with low voltage difference (such as 0-3V, 0-7.6V and-7.6V-3V) is selected, a better high Touch signal to noise ratio can be obtained.
In some embodiments, as shown in fig. 2a, the display panel further includes a third power supply (VDDI) 6 and a fourth power supply (VDDIO) 7, the touch display integrated circuit 1 further includes an input/output interface circuit (I/O) 12 and a Logic control circuit (Logic) 13, and the third power supply 6 is electrically connected to the input/output interface circuit 12, the Logic control circuit 13 and the common circuit 113; the fourth power supply 7 is electrically connected to the input-output interface circuit 12.
The third power supply 6 provides power for the input/output interface circuit 12, the logic control circuit 13 and the common circuit 113. The fourth power supply 7 supplies power to the input-output interface circuit 12. As shown in fig. 2a, the input-output interface circuit 12 is a GPIO (general purpose digital input-output interface) circuit. The logic control circuit 13 performs digital operations such as enlargement, reduction, and averaging. The third power supply 6 drives the logic control circuit 13 through LDO (low dropout linear regulator).
In some embodiments, as shown in fig. 2a, the display panel further includes a Flash memory circuit (Flash) 8 and a Host side Host, where the Flash memory circuit 8 is configured to provide stored signals or data (such as display data) to the touch display integrated circuit 1. The flash memory circuit 8 is powered by the third power supply 6. The first power supply 2, the second power supply 3, the third power supply 6, and the fourth power supply 7 are all provided by the Host side Host.
In some embodiments, as shown in fig. 2c, the display panel further includes a third switch 9, and the third switch 9 is electrically connected between the third power supply 6 and the touch driving circuit 111 and/or between the third power supply 6 and the display driving circuit 112.
The third switch 9 may be used to turn on or off the electrical connection between the third power supply 6 and the touch driving circuit 111, and the third switch 9 may also be used to turn on or off the electrical connection between the third power supply 6 and the display driving circuit 112.
In some embodiments, the third power supply 6 and the fourth power supply 7 each comprise a regulated dc power supply; the output voltage range of the third power supply 6 is 1.8-2.5V; the output voltage range of the fourth power supply 7 is 1.2 to 2V.
In some embodiments, the output voltage of the third power supply 6 is 1.8V, for example.
In some embodiments, as shown in fig. 2b, the power supply potential of the integrated circuit 1 is shown as a touch display. The high voltage is converted into a low voltage required by the touch display integrated circuit 1 through a low dropout Linear Regulator (Linear Regulator), such as VGH 1/2 and VINT_ P, ELVDD, VGMP, VGSP, VDD, VDDM, ELVSS, VINT _ N, VGL, VGL 1/2. The power supply voltage is converted into other voltages required by the touch display integrated circuit 1 by a Charge Pump (voltage converter), such as VGL, AVEE, VGH. Direct Supply represents voltage Direct Supply, such as AVDD, VCI, VDDI, VDDIO, AVEE, GND and the like; along the arrangement sequence of the direct supply voltages from top to bottom in fig. 2b, the potential of the direct supply voltages decreases in sequence. In fig. 2b, gamma, source, GOA are all circuits in the display driving circuit 112 of the touch display integrated circuit 1. Touch Drive is a back-end Drive circuit in the Touch Drive circuit 111; the Touch AFE/ADC is a front-end processing circuit in the Touch driving circuit 111. IO is an input-output circuit. The Digital Logic (Memory) is a Logic circuit, a Memory circuit, and the like in the touch display integrated circuit 1.
Based on the above structure of the display panel, the embodiment of the present invention further provides a driving method of the display panel, as shown in fig. 3, including: in a display starting stage of the display panel, when the display panel is in a touch state, the second power supply supplies power for touch driving of the display panel; when the display panel is in the touch idle state, the second power supply supplies power for touch driving of the display panel, or the first power supply supplies power for touch driving of the display panel.
The touch idle state refers to a state in which the display panel does not perform any touch operation or touch processing, for example: only watching the display video of the display panel, and not performing touch operation; or only reading on the display panel, and not performing touch operation.
In this embodiment, when the display panel is in the touch state, the second power supply provides power for the touch driving of the display panel, so that the normal touch of the display panel during display can be ensured; when the display panel is in a touch idle state, a power supply is provided for touch driving of the display panel through the first power supply or the second power supply, so that the touch function of the display panel can be awakened at any time; when the second power supply supplies power for touch control driving, the touch control wakeup of the display panel is more sensitive; when the first power supply supplies power for the touch control drive, the touch control power consumption of the display panel can be reduced.
As shown in fig. 3, at the ⑥ th stage of the Display panel driving, the Display State (DRIVER STATE) is a Display On stage, and the Touch State (Touch State) corresponds to two Touch modes; the third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI), the reset signal (RESX) are all at a high level; the processor input/output interface (MIPI I/F) receives the picture information written in the host (IMAGE WRITE), and the Display panel performs Normal Display (Normal Display).
In a Display On stage (Display On), the second power supply supplies power for Display driving (AVDD power On); the display panel can correspond to two touch modes: 1. touch activated mode (Touch Active Mode-Normal); 2. touch Idle Mode (Touch Idle Mode). In a touch activation mode, the second power supply supplies power for the touch drive; in the touch idle mode, two power supply modes exist for touch driving: scheme 1: the second power supply supplies power to the touch control drive (AVDD Touch power on), and touch control awakening is more sensitive; scheme 2: the second Power supply no longer supplies Power to the Touch drive (avdd_touch Power off), and the first Power supply supplies Power to the Touch drive (VCIDrive Touch) to save Power consumption.
In this embodiment, two power supply modes in the touch idle mode are selected for use according to the actual condition of debugging at the host. Referring to fig. 2c, when the second power supply (AVDD) supplies power to the Touch driving in the Touch idle mode, the second switch 5 turns off the electrical connection between the first power supply (VCI) and the Touch driving circuit (Touch portion); when the first power supply (VCI) supplies power to the Touch driving circuit in the Touch idle mode, the first switch 4 turns off the electrical connection between the second power supply (AVDD) and the Touch driving circuit (Touch portion).
In some embodiments, the driving method of the display panel further includes: in the display closing stage of the display panel, the display panel is in a touch idle state, and the second power supply supplies power for touch driving of the display panel or the first power supply supplies power for touch driving of the display panel.
In the display closing stage of the display panel, the display panel is in a touch idle state correspondingly, and the first power supply or the second power supply is used for providing power for touch driving of the display panel, so that the touch function of the display panel can be awakened at any time; when the second power supply supplies power for touch control driving, the touch control wakeup of the display panel is more sensitive; when the first power supply supplies power for the touch control drive, the touch control power consumption of the display panel can be reduced.
As shown In fig. 3, the ⑦ th stage of the Display panel driving, i.e., the Display State (DRIVER STATE) is a Display Off stage (Display Off), which is displayed In a Sleep Mode (Sleep In), and the Touch State (Touch State) is a Touch Sleep Mode (Touch Sleep Mode); the third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI), the reset signal (RESX) are all at a high level; the processor input/output interface (MIPI I/F) signal is high level, and no picture information of the host is written.
During a Display Off phase (Display Off), the second power supply no longer supplies power to the Display driver (AVDD DDI power Off); the display panel can correspond to a Touch Idle Mode (Touch Idle Mode), namely a Touch Sleep Mode (Touch Sleep Mode), and in the Touch Sleep Mode, the Touch of the display panel can be awakened through gestures (Gesture Wakeup); in the touch idle mode, two power supply modes exist for touch driving: scheme 1: the second power supply supplies power to the touch control drive (AVDD Touch power on), and touch control awakening is more sensitive; scheme 2: the second Power supply no longer supplies Power to the Touch drive (avdd_touch Power off), and the first Power supply supplies Power to the Touch drive (VCIDrive Touch) to save Power consumption.
In some embodiments, as shown in fig. 3, in a Display On phase (Display On) of the Display panel, the second power supply supplies power (AVDD power On, AVDD DDI power On) to the Display drive of the Display panel.
In some embodiments, as shown in fig. 3, during a Display Off phase (Display Off) of the Display panel, the second power supply stops providing power to the Display drive of the Display panel (AVDD DDI power Off).
In this embodiment, as shown in fig. 3, the driving of the Display panel further includes the following stages before the Display On stage (Display On) of the Display panel:
① th phase, unKnown (UnKnown state) phase: both the display State (DRIVER STATE) and the Touch State (Touch State) are in the UnKnown phase. In the stage, the display panel is started, and the third power supply, the fourth power supply (VDDI and VDDIO, the power-on time sequences of the third power supply and the fourth power supply are the same), and the first power supply (VCI) are powered on in sequence; the reset signal (RESX), the processor input output interface (MIPI/F) signal, the SWIRE control signal, and the second power supply (AVDD) all maintain a low state.
Stage ②, reset (Reset) stage: both the display State (DRIVER STATE) and the Touch State (Touch State) are in the Reset phase. In this stage, the reset signal (RESX) is high, low, high level, resets all circuits (including register circuits) inside the touch display integrated circuit, and then keeps high level all the time; the third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI) are at a high level; the processor input output interface (MIPI I/F) signal level is pulled high, starting to download the initial code from the Host side (Host).
At stage ③, the OTP load, i.e., the display and touch program or FW (firmware or program) is downloaded from the Flash memory circuit (Flash) to the touch display integrated circuit. The display OTP Reload comprises a Gamma Band (one display brightness corresponds to one Gamma curve, one Gamma curve is one Gamma group), time sequence control, panel ID (display Panel identification code) and other information downloads; the third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI), the reset signal (RESX) are all at a high level; the processor input output interface (MIPI I/F) signal level is pulled high and the initial code state is downloaded from the Host side (Host). Initial code states such as resolution, PPS (decompression parameters), etc.
At stage ④, the display State (DRIVER STATE) is in the Multi IP read (Multi IP download) and CMD Exec (execute command) stages, the Touch State is in TP FW Upload (i.e. the Touch firmware or program is downloaded from the flash memory circuit to the Touch display integrated circuit), and the Multi IP read & CMD Exec stages and TP FW Upload are synchronized. At this stage, the third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI), the reset signal (RESX) are all at a high level; the processor input/output interface (MIPI/F) signal level is pulled up, and the initial code state (such as SLPOUT: power-on instruction) is downloaded from the Host end (Host), that is, the processor input/output interface (MIPI I/F) signal sends the power-on instruction, and after the SWIRE2 control signal is pulled up, the PMIC (power management integrated circuit) at the Host end starts the second power AVDD to supply power to the touch display integrated circuit.
At stage ⑤, the display State (DRIVER STATE) is in the Power Up Sequence (power-on sequence) stage, the Touch State (Touch State) is in the Touch SCAN INITIAL (Touch scan initialization) stage, and the Power Up Sequence stage and Touch SCAN INITIAL stage are synchronized. The third and fourth power supplies (VDDI and VDDIO), the first power supply (VCI), the reset signal (RESX) are all at a high level; processor input output interface (MIPI I/F) signal level is pulled high; SWIRE 2a control signal controls an external PMIC (power management integrated circuit) to supply power to a display driving circuit in the touch display integrated circuit, and the touch driving circuit in the synchronous touch display integrated circuit is ready for touch scanning.
Unlike the related art, which needs to implement mode switching between touch and display of the display panel by a control signal, in this embodiment, a Sync signal (a signal that provides the same time reference for the touch driving circuit and the display driving circuit that need to process information synchronously) is provided between a touch driving circuit and a display driving circuit inside the touch display integrated circuit, which is in communication with each other, so that the display panel can perform mode switching between touch and display without delay.
The display panel provided in this embodiment, on the basis that the first power supply can provide power for the touch driving circuit in the touch display integrated circuit, can also provide power for the touch driving circuit by making the second power supply, compared with the configuration of the capacitive component in the mutual capacitance TDDI chip VR40 applied to the OLED touch display product in the related art, the touch display integrated circuit in this embodiment can reduce the configuration of one charge pump, so that the configuration of one flying capacitor and one filter capacitor can be reduced, and further, the size of the touch display integrated circuit is reduced, and the cost of the touch display integrated circuit is reduced; for a display panel of about 7 inches, the scheme of supplying power by the first power supply and the second power supply in this embodiment can reduce the size of the touch display integrated circuit by about 6%, and reduce the cost of the touch display integrated circuit by about 6%.
The embodiment of the invention also provides a display device which comprises the display panel in the embodiment.
By adopting the display panel in the above embodiment, the size of the display device can be reduced and the cost of the display device can be reduced.
The display device may be: OLED panels, OLED televisions, folding products, touch screens, electronic paper, mobile phones, tablet computers, notebook computers, displays, notebook computers, digital photo frames, navigator and any other products or components with display functions.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (15)
1. A display panel, comprising: the touch display integrated circuit, a first power supply and a second power supply,
The touch display integrated circuit includes an analog driving circuit,
The analog driving circuit comprises a touch driving circuit and a display driving circuit;
The first power supply is electrically connected with the touch control driving circuit and the display driving circuit and is configured to provide power for the touch control driving circuit and the display driving circuit;
The second power supply is electrically connected with the display driving circuit and is configured to provide power for the display driving circuit;
The touch control driving circuit is characterized in that the second power supply is further electrically connected with the touch control driving circuit and is further configured to provide power for the touch control driving circuit.
2. The display panel of claim 1, further comprising a first switch,
The first switch is electrically connected between the second power supply and the touch control driving circuit and/or between the second power supply and the display driving circuit.
3. The display panel according to claim 1 or 2, further comprising a second switch,
The second switch is electrically connected between the first power supply and the touch control driving circuit and/or between the first power supply and the display driving circuit.
4. The display panel of claim 1, wherein the analog driving circuit further comprises a common circuit,
The first power supply is also electrically connected to the common circuit.
5. The display panel of claim 4, wherein the touch driving circuit comprises a front-end processing circuit and a back-end driving circuit,
The first power supply is electrically connected with the front-end processing circuit and the rear-end driving circuit;
The second power supply is electrically connected with the rear end driving circuit.
6. The display panel of claim 5, wherein the first power source and the second power source each comprise a regulated dc power source;
The output voltage range of the first power supply is 2.8-4V;
the output voltage range of the second power supply is 7-8V.
7. The display panel of claim 6, wherein the first power supply and the second power supply provide voltage to the back-end drive circuit at a gear level comprising:
0～3V、0～7.6V、-7.6V～3V、-7.6V～7.6V。
8. The display panel of claim 4, further comprising a third power source and a fourth power source,
The touch display integrated circuit also comprises an input-output interface circuit and a logic control circuit,
The third power supply is electrically connected with the input/output interface circuit, the logic control circuit and the shared circuit;
the fourth power supply is electrically connected with the input/output interface circuit.
9. The display panel of claim 8, further comprising a third switch,
The third switch is electrically connected between the third power supply and the touch control driving circuit and/or between the third power supply and the display driving circuit.
10. The display panel of claim 8, wherein the third power supply and the fourth power supply each comprise a regulated dc power supply;
The output voltage range of the third power supply is 1.8-2.5V;
the output voltage range of the fourth power supply is 1.2-2V.
11. A display device comprising the display panel of any one of claims 1-10.
12. A driving method of a display panel according to any one of claims 1 to 10, comprising: in the display-on phase of the display panel,
When the display panel is in a touch state, the second power supply supplies power for touch driving of the display panel;
When the display panel is in the touch idle state, the second power supply provides power for touch driving of the display panel, or the first power supply provides power for touch driving of the display panel.
13. The method for driving a display panel according to claim 12, further comprising: in the display closing stage of the display panel, the display panel is in the touch idle state, and the second power supply provides power for touch driving of the display panel or the first power supply provides power for touch driving of the display panel.
14. The method according to claim 12, wherein the second power supply supplies power for display driving of the display panel in the display on period of the display panel.
15. The method according to claim 13, wherein the second power supply stops supplying power to the display driving of the display panel in a display off stage of the display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410663627.9A CN118538166A (en) | 2024-05-27 | 2024-05-27 | Display panel, driving method thereof, and display device |
| PCT/CN2025/095466 WO2025246981A1 (en) | 2024-05-27 | 2025-05-16 | Display panel and driving method therefor, and display apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410663627.9A CN118538166A (en) | 2024-05-27 | 2024-05-27 | Display panel, driving method thereof, and display device |
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| CN118538166A true CN118538166A (en) | 2024-08-23 |
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| CN202410663627.9A Pending CN118538166A (en) | 2024-05-27 | 2024-05-27 | Display panel, driving method thereof, and display device |
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| WO (1) | WO2025246981A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025246981A1 (en) * | 2024-05-27 | 2025-12-04 | 京东方科技集团股份有限公司 | Display panel and driving method therefor, and display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102273499B1 (en) * | 2014-12-29 | 2021-07-07 | 엘지디스플레이 주식회사 | Display device having a touch sensor and driving method thereof |
| CN108762560B (en) * | 2018-05-25 | 2021-01-29 | 京东方科技集团股份有限公司 | Touch panel, control method thereof, and display device |
| TWI765282B (en) * | 2020-06-19 | 2022-05-21 | 大陸商北京集創北方科技股份有限公司 | Touch display chip and information processing device |
| US11543916B2 (en) * | 2021-02-17 | 2023-01-03 | Himax Technologies Limited | Driver circuit for driving display panel having touch sensing function |
| CN217640138U (en) * | 2022-06-29 | 2022-10-21 | 深圳市爱协生科技有限公司 | TDDI display module and terminal equipment |
| CN118538166A (en) * | 2024-05-27 | 2024-08-23 | 京东方科技集团股份有限公司 | Display panel, driving method thereof, and display device |
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- 2024-05-27 CN CN202410663627.9A patent/CN118538166A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025246981A1 (en) * | 2024-05-27 | 2025-12-04 | 京东方科技集团股份有限公司 | Display panel and driving method therefor, and display apparatus |
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| WO2025246981A1 (en) | 2025-12-04 |
| WO2025246981A9 (en) | 2026-01-22 |
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