CN114664251B - Display panel, driving method and related equipment - Google Patents

Display panel, driving method and related equipment Download PDF

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Publication number
CN114664251B
CN114664251B CN202210422806.4A CN202210422806A CN114664251B CN 114664251 B CN114664251 B CN 114664251B CN 202210422806 A CN202210422806 A CN 202210422806A CN 114664251 B CN114664251 B CN 114664251B
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China
Prior art keywords
voltage signal
pin
common voltage
display panel
far
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CN202210422806.4A
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Chinese (zh)
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CN114664251A (en
Inventor
钱娟
熊雄
李佑路
丁雷鸣
郑敏栋
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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Priority to CN202210422806.4A priority Critical patent/CN114664251B/en
Publication of CN114664251A publication Critical patent/CN114664251A/en
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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]
    • 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance

Abstract

The application discloses a display panel, a driving method and related equipment, relates to the technical field of display, and can improve stripe display failure. A display panel, comprising: the common electrode is electrically connected with at least one near-end pin at one end close to the driving chip, and at least one far-end pin at one end far away from the driving chip; the electrical test pin is used for transmitting an electrical test signal to a display device of the display panel and is electrically connected with the far-end pin; the driving chip is used for transmitting a common voltage signal to the common electrode through the near-end pin and transmitting the common voltage signal to the common electrode through the electrical test pin and the far-end pin.

Description

Display panel, driving method and related equipment
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method, and related devices.
Background
With the continuous development of display technology, the touch technology is gradually integrated with the display technology, so that a touch substrate is not required to be arranged in the display device separately to realize a touch function. The existing touch function is generally realized through a touch electrode, and the capacitance change of the touch electrode can reflect the touch position of a user, so that the touch operation positioning of the user is realized.
However, the touch electrode is generally in a block shape, and in the process of displaying on the display panel, the common voltage on the common electrode is attenuated in the transmission process, the attenuated voltage is further affected by the touch electrode, and stripe display failure is easily generated at the far end of the common voltage transmission.
Disclosure of Invention
The embodiment of the application provides a display panel, a driving method and related equipment, which can improve stripe display failure.
In a first aspect of embodiments of the present application, there is provided a display panel, including:
the common electrode is electrically connected with at least one near-end pin at one end close to the driving chip, and at least one far-end pin at one end far away from the driving chip;
the electrical test pin is used for transmitting an electrical test signal to a display device of the display panel and is electrically connected with the far-end pin;
the driving chip is used for transmitting a common voltage signal to the common electrode through the near-end pin and transmitting the common voltage signal to the common electrode through the electrical test pin and the far-end pin.
In some embodiments, the common voltage signal includes a first common voltage signal and a second common voltage signal, the second common voltage signal being greater than the first common voltage signal;
the driving chip is used for transmitting the first common voltage signal to the common electrode through the near-end pin and transmitting the second common voltage signal to the common electrode through the electrical test pin and the far-end pin.
In some embodiments, the second common voltage signal is determined by an amount of voltage that decays during the transfer of a third common voltage signal from the proximal pin to the distal pin, wherein the first common voltage signal and the second common voltage signal are both less than the third common voltage signal.
In some embodiments, a start time of the first common voltage signal transmitted by the driving chip is delayed by a set time with respect to a start time of the second common voltage signal transmitted.
In some embodiments, the set time is determined by a time elapsed for the common voltage signal to be transmitted from the driver chip to the remote pin.
In some embodiments, a switch assembly is disposed between the electrical test pin and the distal pin.
In some embodiments, the switch assembly is configured to receive a close signal for closing the switch assembly when the electrical test signal is transmitted to the display device through the electrical test pin;
the switch assembly is configured to receive an on signal for turning on the switch assembly in the case that the common voltage signal is transmitted to the common electrode through the electrical test pin and the remote pin.
In some embodiments, the switching assembly includes a thin film transistor having a gate for receiving the off signal or the on signal.
In some embodiments, the number of proximal pins is at least two and the number of distal pins is at least two.
In some embodiments, the display panel further comprises:
the touch electrodes are electrically connected with the driving chip;
the driving chip is used for driving the display device and the touch electrode.
In a second aspect of the embodiments of the present application, there is provided a driving method of a display panel, including:
in the electrical testing stage, transmitting an electrical testing signal to a display device of the display panel through an electrical testing pin;
in the display stage, a drive chip is utilized to transmit a public voltage signal to a public electrode through a near-end pin, and the public voltage signal is transmitted to the public electrode through an electrical test pin and a far-end pin, wherein one end, close to the drive chip, of the public electrode is electrically connected with at least one near-end pin, one end, far away from the drive chip, of the public electrode is electrically connected with at least one far-end pin, and the electrical test pin is electrically connected with the far-end pin.
In some embodiments, the common voltage signal includes a first common voltage signal and a second common voltage signal, the second common voltage signal being greater than the first common voltage signal;
in the display stage, the driving chip is used to transmit a common voltage signal to a common electrode through a near-end pin, and transmit the common voltage signal to the common electrode through the electrical test pin and a far-end pin, and the method comprises the following steps:
In a display stage, the driving chip is utilized to transmit the first common voltage signal to the common electrode through the near-end pin, and transmit the second common voltage signal to the common electrode through the electrical test pin and the far-end pin.
In some embodiments, the transmitting, during the display phase, the first common voltage signal to the common electrode through the proximal pin and the second common voltage signal to the common electrode through the electrical test pin and the distal pin using the driver chip includes:
in a display stage, the driving chip is utilized to transmit the second common voltage signal to the common electrode through the electrical test pin and the far-end pin;
and after the set time, transmitting the first common voltage signal to the common electrode through the near-end pin by using the driving chip.
In some embodiments, before the transmitting, by the driving chip, the second common voltage signal to the common electrode through the electrical test pin and the remote pin in the display stage, the method further includes:
Transmitting a third public voltage signal to the public electrode through the near-end pin, and collecting the voltage on the far-end pin to obtain a far-end public voltage;
performing difference operation on the third common voltage signal and the far-end common voltage to obtain an attenuation voltage;
and carrying out addition operation on the first public voltage signal and the attenuation voltage to obtain the second public voltage signal.
In some embodiments, the driving method of the display panel further includes:
and pre-testing the time of the second common voltage signal transmitted from the driving chip to the far-end pin, and taking the time obtained by testing as the set time.
In some embodiments, the third common voltage signal is twice the first common voltage signal.
In some embodiments, the driving method of the display panel further includes:
transmitting a closing signal to a switch assembly in the electrical testing stage and in the process of collecting the voltage on the far-end pin, wherein the switch assembly is arranged between the electrical testing pin and the far-end pin, and the closing signal is used for closing the switch assembly;
And transmitting an opening signal to the switch assembly in the process of transmitting the second common voltage signal to the common electrode through the electrical test pin and the far-end pin, wherein the opening signal is used for opening the switch assembly.
In some embodiments, the driving method of the display panel further includes:
in the display stage, a duty ratio of a scan driving signal driving the display device is adjusted.
In a third aspect of embodiments of the present application, there is provided a controller, including:
a memory in which a computer program is stored;
a processor for implementing the driving method of the display panel according to the second aspect when executing the computer program.
In a fourth aspect of embodiments of the present application, there is provided a display device, including:
the display panel according to the first aspect, and/or the controller according to the third aspect.
According to the display panel, the driving method and the related equipment, the far-end pins are arranged at one end, far away from the driving chip, of the public electrode, and the public voltage signals provided by the driving chip are transmitted to the far-end pins through the time-sharing multiplexing electrical testing pins, so that connecting wires are not required to be arranged for the far-end pins independently, the connecting wires of the display device can be shared, and the space occupied by circuit arrangement can be saved. The electrical test pins are used for transmitting electrical test signals in the electrical test stage of the display panel, and transmitting public voltage signals in the display stage of the display panel, so that the electrical test pins can realize time-sharing multiplexing, the test pins and connecting wires do not need to be independently arranged, and the number and arrangement occupied space of the test pins are saved. In addition, the public voltage signal can be transmitted from the near end to the far end of the public electrode through the near end pin, and the public voltage signal can be synchronously transmitted from the far end to the near end of the public electrode through the far end pin, so that the attenuation of the public voltage signal transmitted from the far end to the near end and the attenuation of the public voltage signal transmitted from the near end to the far end can be mutually compensated, the problem that the public voltage signals at the far end and the near end of the public electrode are inconsistent is solved, the driving force of the public voltage signal at the far end of the public electrode is improved, the stripe defect of a display panel can be further improved or even eliminated, and the reject ratio of the display panel is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
FIG. 3 is a timing diagram of a common voltage signal according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present application;
FIG. 5 is a schematic block diagram of a controller according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to better understand the technical solutions provided by the embodiments of the present specification, the following detailed description of the technical solutions of the embodiments of the present specification is made through the accompanying drawings and the specific embodiments, and it should be understood that the specific features of the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, and not limit the technical solutions of the present specification, and the technical features of the embodiments of the present specification may be combined with each other without conflict.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "two or more" includes two or more cases.
With the continuous development of display technology, the touch technology is gradually integrated with the display technology, so that a touch substrate is not required to be arranged in the display device separately to realize a touch function. The existing touch function is generally realized through a touch electrode, and the capacitance change of the touch electrode can reflect the touch position of a user, so that the touch operation positioning of the user is realized. However, the touch electrode is generally in a block shape, and in the process of displaying on the display panel, the common voltage on the common electrode is attenuated in the transmission process, the attenuated voltage is further affected by the touch electrode, and stripe display failure is easily generated at the far end of the common voltage transmission.
In view of the foregoing, embodiments of the present application provide a display panel, a driving method and a related apparatus, which can improve stripe display failure.
In a first aspect of the embodiments of the present application, a display panel is provided, and fig. 1 is a schematic structural diagram of the display panel provided in the embodiments of the present application. As shown in fig. 1, a display panel provided in an embodiment of the present application includes: and one end of the common electrode 100, which is close to the driving chip 200, is electrically connected with at least one proximal pin 110, and one end of the common electrode 100, which is far away from the driving chip 200, is electrically connected with at least one distal pin 120. Note that, the common electrode 100 is generally used as a carrier of a common voltage signal of the display device 400 in the display panel, where the common voltage signal may be from the driving chip 200, and the driving chip 200 is used to drive the display device 400 in the display panel to display. The common voltage signal on the common electrode 100 may also be used as a reference voltage for the touch electrode on the display panel, and in general, the self-capacitance touch mode requires a constant voltage as a reference voltage, and the common voltage signal on the common electrode 100 may be used as a reference voltage for the self-capacitance touch mode. The common electrode 100 may cover a display area of the display panel, and the common electrode 100 may cover the display area entirely, and some devices and circuit areas need to be punched on the common electrode 100. The electrical test pin 300, the electrical test pin 300 is used for transmitting an electrical test signal to the display device 400 of the display panel, and the electrical test pin 300 is electrically connected with the remote pin 120. In the preparation process of the display panel, after the preparation of the display device 400 is completed, the electrical performance and the display function of the display device 400 are required to be tested, an electrical test signal can be transmitted to the display device 400 through the electrical test pin 300, the electrical test signal can drive the display of the display device 400, different electrical test signals can drive the display device 400 to display in different states, and whether the electrical performance and the display function of the display device 400 are normal can be judged by observing the display effect of the display panel under different display pictures. The driving chip 200 is used for transmitting a common voltage signal to the common electrode 100 through the proximal pin 110 and transmitting the common voltage signal to the common electrode 100 through the electrical test pin 300 and the distal pin 120. The driving chip 200 can transmit the common voltage signal to the far-end pin 120 through the electrical test pin 300, and further transmit the common voltage signal to the common electrode 100 through the far-end pin 120, so that the electrical test pin 300 can be used for transmitting the electrical test signal in the electrical test stage of the display panel by time-division multiplexing of the electrical test pin 300, and the electrical test pin 300 transmits the common voltage signal in the display stage of the display panel. The number of the electrical test pins 300 is generally plural, and the electrical test pins are respectively used for transmitting electrical test signals to the display devices 400 in different rows or columns, so that the electrical test pins connected with the display devices far away from the driving chip 200 can be selected as common pins electrically connected with the distal pins 120, and electrical connection wires between the electrical test pins 300 and the distal pins 120 can be shared without separate arrangement, so that space occupied by circuit arrangement can be saved.
It should be noted that, the common voltage signal may be transmitted from the proximal end to the distal end of the common electrode 100 through the proximal pin 110, and the common voltage signal may be simultaneously transmitted from the distal end to the proximal end of the common electrode 100 through the distal pin 120, so as to compensate for the attenuation of the transmission of the common voltage signal from the distal end to the proximal end of the common electrode 100 and the attenuation of the transmission from the proximal end to the distal end.
It should be noted that, the display panel provided in the embodiments of the present application may be a passive light-emitting liquid crystal display panel, or may be an active light-emitting organic light-emitting display panel, which is not specifically limited in the embodiments of the present application. In the liquid crystal display panel, the display device 400 may be a driving device that drives the liquid crystal to rotate, and the driving device may include a thin film transistor; in the organic light emitting display panel, the display device 400 may include a driving assembly for driving the light emitting assembly to emit light and a light emitting device, and the driving assembly may include at least one TFT (thin film transistor), for example, 7 TFTs and 1 capacitor or 2 TFTs and 1 capacitor, and the embodiment of the present application is not particularly limited.
It should be noted that, the number of the proximal pins 110 shown in fig. 1 is 2, the number of the distal pins 120 is 2, and fig. 1 is only schematic and is not a specific limitation of the present application.
It should be noted that, generally, the proximal end of the common electrode refers to an end of the common electrode close to the driving chip, the distal end of the common electrode refers to an end of the common electrode far away from the driving chip, and generally, the driving chip is disposed at one side of the display panel, and then the common voltage signal output from the driving chip is transmitted from the proximal end to the distal end of the common electrode. Signal attenuation can occur in the process of transmitting the public voltage signal from the near end to the far end of the public electrode, so that the public voltage signal at the far end of the public electrode is inconsistent with the public voltage signal at the near end, the driving force of the public voltage signal transmitted to the far end of the public electrode is insufficient, the influence of progressive scanning signals of a display device is overlapped, or the voltage signal is pulled by the overlapped touch electrode, so that stripe defects can be generated at the far end (the side far away from a driving chip) of the display panel. The severity of streak defects varies from display panel to display panel.
To address the above-mentioned problem, in the display panel provided by the embodiment of the present application, the far-end pin 120 is disposed at the end of the common electrode 100 far away from the driving chip, and the common voltage signal provided by the driving chip 200 is transmitted to the far-end pin 120 through the time-sharing multiplexing electrical testing pin 300, so that the connection wire for the far-end pin 120 is not required to be separately disposed, the connection wire with the display device 400 can be shared, and the space occupied by the circuit arrangement can be saved. The electrical test pins 300 are used for transmitting electrical test signals in the electrical test stage of the display panel, and the electrical test pins 300 transmit common voltage signals in the display stage of the display panel, so that the electrical test pins 300 can realize time-sharing multiplexing, and the number and arrangement occupied space of the test pins are saved without independently setting the test pins and connecting wires. In addition, the common voltage signal may be transmitted from the proximal end to the distal end of the common electrode 100 through the proximal end pin 110, and the common voltage signal may be simultaneously transmitted from the distal end to the proximal end of the common electrode 100 through the distal end pin 120, so that the attenuation of the transmission of the common voltage signal from the distal end to the proximal end of the common electrode 100 and the attenuation of the transmission from the proximal end to the distal end can be mutually compensated, the problem that the common voltage signals at the distal end and the proximal end of the common electrode are inconsistent is improved, the driving force of the common voltage signal at the distal end of the common electrode 100 is improved, and further, the stripe defect of the display panel can be improved or even eliminated, and the defect rate of the display panel is reduced.
In some embodiments, the common voltage signal Vcom includes a first common voltage signal Vcom1 and a second common voltage signal Vcom2, the second common voltage signal Vcom2 being greater than the first common voltage signal Vcom1; the driving chip 200 is used for transmitting a first common voltage signal Vcom1 to the common electrode 100 through the proximal pin 110, and transmitting a second common voltage signal Vcom2 to the common electrode 100 through the electrical test pin 300 and the distal pin 120. In general, the conventional display panel is provided with a third common voltage signal Vcom3 transmitted from the proximal end to the distal end of the common electrode, and the third common voltage signal Vcom3 is attenuated by a voltage signal Δvcom when transmitted from the proximal end pin 110 to the distal end pin 120 through the common electrode 100, that is, the attenuation amount of the voltage signal Δvcom occurs during the transmission of the third common voltage signal Vcom3 from the proximal end to the distal end of the common electrode. The second common voltage signal Vcom2 may be determined by an amount of voltage attenuated in the process of transferring the third common voltage signal Vcom3 from the proximal pin 110 to the distal pin 120, and both the first common voltage signal Vcom1 and the second common voltage signal Vcom2 are smaller than the third common voltage signal Vcom3.
For example, the third common voltage signal Vcom3 may be twice as large as the first common voltage signal Vcom1, that is, vcom 3=2vcom 1; the second common voltage signal may be the sum of the first common voltage signal and the attenuated voltage, i.e., vcom 2=vcom 1+Δvcom. Accordingly, in the display stage, the driving chip 200 outputs the first common voltage signal Vcom1 and the second common voltage signal Vcom2, the first common voltage signal Vcom1 being transmitted to the common electrode 100 via the near-end pin 110, and the second common voltage signal Vcom2 being transmitted to the common voltage signal via the far-end pin 120. The voltage signal attenuation occurs in the process that the first common voltage signal Vcom1 is transmitted from the near-end pin 110 to the far-end pin 120 through the common electrode 100, the common voltage signal Vcom1- Δvcom received by the far-end pin 120 and transmitted from the near-end pin 110 is Vcom1- Δvcom, and then the total common voltage signal received on the far-end pin 120 is Vcom2+vcom1- Δvcom=2vcom 1; the second common voltage signal Vcom2 is attenuated during the process of being transmitted from the far-end pin 120 to the near-end pin 110 through the common electrode 100, when the common voltage signal received by the near-end pin 110 and transmitted from the far-end pin 120 is Vcom2- Δvcom=vcom 1, the total common voltage signal received on the near-end pin 110 is Vcom1+vcom 1=2vcom 1, so that the total common voltage signals received on the near-end pin 110 and the far-end pin 120 are both 2Vcom1, and the common voltage signals of the near-end and the far-end are identical, i.e. the total common voltage signal received by the common electrode 100 is the third common voltage signal Vcom3.
Compared with the mode that the public voltage signal is independently transmitted from the near end to the far end of the public electrode 100, the display panel provided by the embodiment of the application transmits the public voltage signal from the near end to the far end of the public electrode 100, and meanwhile, the public voltage signal is transmitted from the far end to the near end, so that the total public voltage signal received by the public electrode 100 is unchanged, the driving capability of the public electrode is not influenced, the voltage inconsistencies caused by attenuation of the public voltage signals of the near end and the far end can be mutually compensated, the public voltage signals of the far end and the near end of the public electrode 100 tend to be consistent, the driving force of the public voltage signal at the far end of the public electrode 100 is improved, stripe defects of the display panel are further improved or even eliminated, and the reject ratio of the display panel is reduced.
In some embodiments, the start time of the first common voltage signal transmitted by the driving chip 200 is delayed by a set time with respect to the start time of the second common voltage signal transmitted. Since the second common voltage signal and the first common voltage signal are both sent from the driving chip 200, the distance between the near-end pin 110 and the driving chip 200 is smaller than the distance between the far-end pin 120 and the driving chip 200, the time required for the second common voltage signal to be transmitted from the driving chip 200 to the far-end pin 120 is longer than the time required for the first common voltage signal to be transmitted from the driving chip 200 to the near-end pin 110, the second common voltage signal needs to be sent out from the driving chip 200 in advance, the first common voltage signal needs to be sent out in a delayed manner, the first common voltage signal and the second common voltage signal can be ensured to reach the common electrode 100 at the same time, and further, the attenuation process in the process of the first common voltage signal transmitted from the near-end pin 110 to the far-end pin 120 is ensured to be consistent with the attenuation process in the process of the second common voltage signal transmitted from the far-end pin 120 to the near-end pin 110, so that the effect that the far-end and near-end common voltage signal of the common electrode 100 is consistent is further achieved, the stripe defect of the display panel is improved or even eliminated, and the defect rate of the display panel is reduced.
In some embodiments, the set time is determined by the time that the common voltage signal has elapsed from the transmission of the driver chip 200 to the distal pin 120. The time that the second common voltage signal reaches the far-end pin 120 after being emitted from the driving chip 200 may be recorded, and the recorded time may be used as the set time.
In some embodiments, a switch assembly is disposed between the electrical test pin 300 and the distal pin 120. The switching assembly may include a thin film transistor, a gate of the thin film transistor to receive an off signal or an on signal, the on signal may be used to turn on the thin film transistor, and the off signal may be used to turn off the thin film transistor. In the case of transmitting an electrical test signal to the display device 400 through the electrical test pin 300, the switching element is configured to receive a closing signal for closing the switching element; in the case that the common voltage signal is transmitted to the common electrode 100 through the electrical test pin 300 and the remote pin 120, the switching assembly is used to receive an on signal for turning on the switching assembly. The arrangement of the switch assembly can realize the time-sharing multiplexing of the electrical test pins 300 in the electrical test stage and the display stage, and the number and arrangement occupation space of the test pins are saved without independently arranging the test pins and connecting wires.
Fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present application. As shown in fig. 2, a first transistor M1 is disposed between the electrical test pin 300 and the distal pin 120. In the electrical testing stage, the first switch control pin 500 may transmit a turn-off signal to the gate of the first transistor M1 to turn off the first transistor M1, the second switch control pin DS may transmit a turn-on signal to the gate of the second transistor M2 to turn on the second transistor M2, and the electrical testing pin 300 may transmit an electrical testing signal to the display device 400 through the turned-on second transistor M2 to light the display device 400, so as to test the display function of the display device 400. In the electrical testing stage, the electrical test pins for transmitting the electrical test signals to the display device 400 can be distinguished according to the color classification of the display device. For example, the display device 400 may include a red display device, a green display device, and a blue display device, and the electrical test pin 300 as time-division multiplexing may be used to transmit an electrical test signal to the red display device, the first test pin D1 may be used to transmit an electrical test signal to the green display device, and the second test pin D2 may be used to transmit an electrical test signal to the blue display device. The electrical test pins 300, the first test pin D1, the second test pin D2, and the second switch control pin DS may be disposed on both sides of the display panel. In the display stage, the first switch control pin 500 may transmit an on signal to the gate of the first transistor M1 to turn on the first transistor M1, and the driving chip 200 transmits a first common voltage signal to the common electrode 100 through the proximal pin 110, and transmits a second common voltage signal to the common electrode 100 through the electrical test pin 300, the first transistor M1, and the distal pin 120, respectively, for display driving.
Note that, the proximal pin 110 and the distal pin 120 may be electrically connected to the common electrode line 130, the common electrode line 130 is disposed around the common electrode 100, and the common electrode line 130 may be electrically connected to the common electrode 100 through a connection lead or a via. The proximal pin 110 and the distal pin 120 may be linear, and the proximal pin 110 and the distal pin 120 may be integrated with the common electrode wire 130, may be prepared in the same process flow, or may be prepared in different process flows. The proximal pin 110, the distal pin 120, the common electrode line 130, and the common electrode 100 may be prepared by the same process flow, and the embodiments of the present application are not limited in particular. The common electrode 100 may be divided into a plurality of sub-regions, each corresponding to at least one sub-pixel, and embodiments of the present application are not particularly limited.
It should be noted that the switch assembly may include a plurality of thin film transistors, and the plurality of thin film transistors may form current compensation, so as to avoid the electrical drift of the thin film transistors along with the accumulation of the service time.
Fig. 3 is a schematic timing diagram of a common voltage signal according to an embodiment of the present application. As shown in fig. 3, in the display stage, after the driving chip 200 transmits the Start signal Start to the switching element, the second common voltage signal Vcom2 is transmitted to the far-end pin 120, and the first common voltage signal Vcom1 is transmitted to the near-end pin 110 after the set time T has elapsed. As shown in fig. 3, the transmission order of the first common voltage signal Vcom1 on the common electrode 100 may be from row 1 to row N, the transmission order of the second common voltage signal Vcom2 on the common electrode 100 may be from row N to row 1, row 1 is electrically connected to the proximal pin 110, row N is electrically connected to the distal pin 120, N is a natural number greater than 0.
The set time T may also be calculated by calculating, i.e., t=l/v, where L is the distance between the proximal pin 110 and the distal pin 120. v is the current velocity, which is generally considered to be the velocity of the electric field establishment, i.e. the speed of light c0= 299792458m/s.
According to the display panel provided by the embodiment of the application, the switch assembly is arranged between the electrical test pin 300 and the far-end pin 120, so that time-sharing multiplexing of the electrical test pin 300 in the electrical test stage and the display stage can be realized, the test pins and connecting wires are not required to be independently arranged, and the number and arrangement occupied space of the test pins are saved.
In some embodiments, the number of proximal pins 110 is at least two and the number of distal pins 120 is at least two. The illustrations in fig. 1 and 2 are illustrative only and are not intended to be limiting in any way.
In some implementations, the display panel provided in the embodiments of the present application further includes: the touch electrodes are electrically connected with the driving chip; the driving chip is used for driving the display device and the touch electrode. The driving chip may have both a driving display function and a driving touch function, and in the transmission process of the common voltage signal on the common electrode, the touch electrode may generate a corresponding pulling effect on the common voltage signal, as shown in fig. 3, where the transmission process of the first common voltage signal Vcom1 and the second common voltage signal Vcom2 is not smooth, and has a certain fluctuation.
For example, the driving chip provided in the embodiments of the present application may use TDDI (Touch and Display Driver Integration ).
In a second aspect of the embodiments of the present application, a driving method of a display panel is provided, and fig. 4 is a schematic flowchart of the driving method of the display panel provided in the embodiments of the present application. As shown in fig. 4, a driving method of a display panel provided in an embodiment of the present application includes:
s101: in the electrical testing stage, an electrical testing signal is transmitted to the display device of the display panel through the electrical testing pin. Referring to fig. 1, in the process of manufacturing a display panel, after the display device 400 is manufactured, it is generally required to test the electrical performance and the display function of the display device 400, and an electrical test signal may be transmitted to the display device 400 through the electrical test pin 300, where the electrical test signal may drive the display of the display device 400, and different electrical test signals may drive the display device 400 to perform display in different states, and whether the electrical performance and the display function of the display device 400 are normal may be determined by observing the display effect of the display panel in different display pictures.
S201: in the display stage, a drive chip is utilized to transmit a public voltage signal to a public electrode through a near-end pin, and the public voltage signal is transmitted to the public electrode through an electrical test pin and a far-end pin, wherein one end of the public electrode, which is close to the drive chip, is electrically connected with at least one near-end pin, one end of the public electrode, which is far away from the drive chip, is electrically connected with at least one far-end pin, and the electrical test pin is electrically connected with the far-end pin. With continued reference to fig. 1, the driving chip 200 may transmit a common voltage signal to the remote terminal 120 through the electrical test pin 300, and further transmit the common voltage signal to the common electrode 100 through the remote terminal 120, so as to time-division multiplex the electrical test pin 300, so that the electrical test pin 300 is used for transmitting the electrical test signal in the electrical test stage of the display panel, and the electrical test pin 300 transmits the common voltage signal in the display stage of the display panel. The number of the electrical test pins 300 is generally plural, and the electrical test pins are respectively used for transmitting electrical test signals to the display devices 400 in different rows or columns, so that the electrical test pins connected with the display devices far away from the driving chip 200 can be selected as common pins electrically connected with the distal pins 120, and electrical connection wires between the electrical test pins 300 and the distal pins 120 can be shared without separate arrangement, so that space occupied by circuit arrangement can be saved.
It should be noted that, the electrical testing stage using the electrical testing pins 300 is usually performed before the display stage, and the electrical testing stage is usually performed during the manufacturing process of the display panel, that is, the testing can be performed after the manufacturing of the display device 400 is completed. The display stage is performed after the driving chip 200 is bound, and the driving chip 200 can be used for performing comprehensive test on the display panel or in the use process after the preparation of the display panel is completed.
Illustratively, the electrical test signal may be transmitted to the electrical test pins 300 through the test probes of the electrical test fixture. The common voltage signal may be programmed code and burned into the driving chip 200, or may be provided to the driving chip 200 through a motherboard control system, which is not particularly limited in the embodiment of the present application.
According to the driving method of the display panel, the public voltage signals provided by the driving chip 200 are transmitted to the far-end pins 120 through the time-sharing multiplexing electrical test pins 300, and therefore, a connecting wire is not required to be arranged for the far-end pins 120 independently, the connecting wire with the display device 400 can be shared, and the space occupied by circuit arrangement can be saved. The electrical test pins 300 are used for transmitting electrical test signals in the electrical test stage of the display panel, and the electrical test pins 300 transmit common voltage signals in the display stage of the display panel, so that the electrical test pins 300 can realize time-sharing multiplexing, and the number and arrangement occupied space of the test pins are saved without independently setting the test pins and connecting wires. In addition, the common voltage signal can be transmitted from the proximal end to the distal end of the common electrode 100 through the proximal end pin 110, and the common voltage signal can be synchronously transmitted from the distal end to the proximal end of the common electrode 100 through the distal end pin 120, so that the attenuation of the transmission of the common voltage signal from the distal end to the proximal end of the common electrode 100 and the attenuation of the transmission from the proximal end to the distal end can be mutually compensated, the problem of inconsistent common voltage signals of the distal end and the proximal end of the common electrode is improved, the driving force of the common voltage signal at the distal end of the common electrode 100 is improved, and further, the stripe defect caused by inconsistent common voltage signals of the distal end and the proximal end on the common electrode 100 of the display panel can be improved or even eliminated, and the defect rate of the display panel is reduced.
In some embodiments, the common voltage signal includes a first common voltage signal and a second common voltage signal, the second common voltage signal being greater than the first common voltage signal. Step S201 may include:
in the display stage, a driving chip is utilized to transmit a first common voltage signal to the common electrode through a near-end pin, and transmit a second common voltage signal to the common electrode through an electrical test pin and a far-end pin.
Specifically, in the display stage, using the driving chip, transmitting a first common voltage signal to the common electrode through the proximal pin, and transmitting a second common voltage signal to the common electrode through the electrical test pin and the distal pin, comprising:
in the display stage, a driving chip is utilized to transmit a second common voltage signal to the common electrode through the electrical test pin and the far-end pin;
after a set time, the driving chip is utilized to transmit a first common voltage signal to the common electrode through the near-end pin.
For example, referring to fig. 3, in the display stage, after the driving chip 200 transmits the Start signal Start to the switching element, the second common voltage signal Vcom2 is transmitted to the far-end pin 120, and the first common voltage signal Vcom1 is transmitted to the near-end pin 110 after the set time T. As shown in fig. 3, the transmission order of the first common voltage signal Vcom1 on the common electrode 100 may be from row 1 to row N, the transmission order of the second common voltage signal Vcom2 on the common electrode 100 may be from row N to row 1, row 1 is electrically connected to the proximal pin 110, row N is electrically connected to the distal pin 120, N is a natural number greater than 0.
In some embodiments, the driving method of the display panel provided in the embodiments of the present application further includes:
the time of the second common voltage signal transmitted from the driving chip to the far-end pin is tested in advance, and the tested time is taken as the set time.
Compared with the method for independently transmitting the public voltage signal from the near end to the far end of the public electrode 100, the method for driving the display panel, which is provided by the embodiment of the invention, transmits the public voltage signal from the near end to the far end of the public electrode 100, and simultaneously transmits the public voltage signal from the far end to the near end, so that the total public voltage signal received by the public electrode 100 is unchanged, the driving capability of the public electrode is not influenced, the voltage inconsistencies caused by attenuation of the public voltage signals at the near end and the far end can be mutually compensated, the public voltage signals at the far end of the public electrode 100 and the near end tend to be consistent, the driving force of the public voltage signal at the far end of the public electrode 100 is improved compared with the prior art, the stripe defects of the display panel are further improved or even eliminated, and the reject ratio of the display panel is reduced.
In some embodiments, before transmitting the second common voltage signal to the common electrode through the electrical test pin and the distal pin using the driving chip in the display stage, the method further comprises:
And transmitting a third public voltage signal to the public electrode through the near-end pin, and collecting the voltage on the far-end pin to obtain the far-end public voltage.
And performing difference operation on the third common voltage signal and the far-end common voltage to obtain the attenuation voltage. For example, the voltage signal attenuation occurs when the third common voltage signal Vcom3 is transmitted from the proximal terminal 110 to the distal terminal 120 through the common electrode 100, and the attenuation voltage is Δvcom, that is, the attenuation amount of the voltage signal of Δvcom occurs during the transmission of the third common voltage signal Vcom3 from the proximal terminal to the distal terminal of the common electrode.
And performing addition operation on the first common voltage signal and the attenuation voltage to obtain a second common voltage signal. The second common voltage signal Vcom2 may be determined by the amount of voltage attenuated in the process of the third common voltage signal Vcom3 passing from the proximal pin 110 to the distal pin 120, and Vcom 2=vcom 1+Δvcom. Illustratively, the third common voltage signal is twice the first common voltage signal, i.e., vcom3 = 2Vcom1.
Illustratively, in the display stage, the driving chip 200 outputs a first common voltage signal Vcom1 and a second common voltage signal Vcom2, the first common voltage signal Vcom1 being transmitted to the common electrode 100 via the near-end pin 110, the second common voltage signal Vcom2 being transmitted to the common voltage signal via the far-end pin 120. The voltage signal attenuation occurs in the process that the first common voltage signal Vcom1 is transmitted from the near-end pin 110 to the far-end pin 120 through the common electrode 100, the common voltage signal Vcom1- Δvcom received by the far-end pin 120 and transmitted from the near-end pin 110 is Vcom1- Δvcom, and then the total common voltage signal received on the far-end pin 120 is Vcom2+vcom1- Δvcom=2vcom 1; the second common voltage signal Vcom2 is attenuated during the process of being transmitted from the far-end pin 120 to the near-end pin 110 through the common electrode 100, when the common voltage signal received by the near-end pin 110 and transmitted from the far-end pin 120 is Vcom2- Δvcom=vcom 1, the total common voltage signal received on the near-end pin 110 is Vcom1+vcom 1=2vcom 1, so that the total common voltage signals received on the near-end pin 110 and the far-end pin 120 are both 2Vcom1, and the common voltage signals of the near-end and the far-end are identical, i.e. the total common voltage signal received by the common electrode 100 is the third common voltage signal Vcom3.
In some embodiments, the driving method of the display panel provided in the embodiments of the present application further includes:
and in the electrical testing stage and in the process of collecting the voltage on the far-end pin, transmitting a closing signal to the switch component, wherein the switch component is arranged between the electrical testing pin and the far-end pin, and the closing signal is used for closing the switch component. The switching assembly may include a thin film transistor. As shown in fig. 2, a first transistor M1 is disposed between the electrical test pin 300 and the distal pin 120. In the electrical testing stage, the first switch control pin 500 may transmit a turn-off signal to the gate of the first transistor M1 to turn off the first transistor M1, the second switch control pin DS may transmit a turn-on signal to the gate of the second transistor M2 to turn on the second transistor M2, and the electrical testing pin 300 may transmit an electrical testing signal to the display device 400 through the turned-on second transistor M2 to light the display device 400, so as to test the display function of the display device 400. In the electrical testing stage, the electrical test pins for transmitting the electrical test signals to the display device 400 can be distinguished according to the color classification of the display device. For example, the display device 400 may include a red display device, a green display device, and a blue display device, and the electrical test pin 300 as time-division multiplexing may be used to transmit an electrical test signal to the red display device, to transmit an electrical test signal to the green display device through the first test pin D1, and to transmit an electrical test signal to the blue display device through the second test pin D2. The electrical test pins 300, the first test pin D1, the second test pin D2, and the second switch control pin DS may be disposed on both sides of the display panel.
And in the process of transmitting a second common voltage signal to the common electrode through the electrical test pin and the far-end pin, transmitting an opening signal to the switch assembly, wherein the opening signal is used for opening the switch assembly. For example, in the display stage, the first switch control pin 500 may transmit an on signal to the gate of the first transistor M1 to turn on the first transistor M1, and the driving chip 200 transmits a first common voltage signal to the common electrode 100 through the proximal pin 110, and transmits a second common voltage signal to the common electrode 100 through the electrical test pin 300, the first transistor M1, and the distal pin 120, respectively, to perform display driving.
It should be noted that, the on signal and the off signal may be written in the driver chip 200 in the form of a programming code, or may be provided to the driver chip 200 through a motherboard control system, which is not specifically limited in the embodiment of the present application.
According to the driving method of the display panel, the closing signal is transmitted to the switch assembly in the electrical testing stage, the opening signal is transmitted to the switch assembly in the display stage, time-sharing multiplexing of the electrical testing pins 300 in the electrical testing stage and the display stage can be achieved, the testing pins and connecting wires do not need to be independently arranged, and the number and arrangement occupied space of the testing pins are saved.
In some embodiments, the driving method of the display panel provided in the embodiments of the present application further includes:
in the display stage, the duty ratio of a scan driving signal driving the display device is adjusted. The scanning driving signals can be transmitted to the scanning signal lines of the display device through the driving chip, in a display stage, the scanning signal ends of the display device can be driven to light up line by the scanning driving signals, the duty ratio of the scanning driving signals can influence stripe display faults, the stripe display faults can be correspondingly improved through proper adjustment of the duty ratio of the scanning driving signals, and the improvement effects are also greatly different according to different display panel size models and mainly related to the design of the display device, the driving circuit and the touch electrode. Illustratively, taking a 10.95 inch product as an example, the duty cycle of the scan driving signal can be adjusted from 25% to 12%, which can effectively improve stripe defects.
It should be noted that, because the TDDI chip is used, the touch electrode has a certain pulling effect on the common voltage signal, and the attenuation effect of the common voltage signal on the common electrode is combined, so that serious bad display stripes are easily caused, and the influence of the touch electrode on the bad stripes can be correspondingly improved by adopting the duty ratio of the scanning driving signal.
According to the driving method of the display panel, the remote public voltage signal transmission is combined with the duty ratio of the scanning driving signal, so that a stronger effect can be achieved on improving stripe display failure.
In a third aspect of the embodiments of the present application, a controller is provided, and fig. 5 is a schematic block diagram of a controller provided in the embodiments of the present application. As shown in fig. 5, a controller provided in an embodiment of the present application includes: a memory 800, the memory 800 storing a computer program; a processor 900, the processor 900 is configured to implement the driving method of the display panel according to the second aspect when executing the computer program.
In a fourth aspect of the embodiments of the present application, a display device is provided, and fig. 6 is a schematic structural diagram of the display device provided in the embodiments of the present application. As shown in fig. 6, a display device provided in an embodiment of the present application includes: the display panel 1000 according to the first aspect, and/or the controller 2000 according to the third aspect. The controller 2000 may be disposed on a control motherboard of the display device, and the controller 2000 may also be integrated in a driving chip, which is not particularly limited in the embodiment of the present application.
The display device provided in the embodiments of the present application may include a smart phone, a tablet computer, a notebook computer, a television or other displays, and the embodiments of the present application are not limited in particular.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-readable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus transmit steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Embodiments of the present application also provide a computer program product comprising computer software instructions that, when run on a processing device, cause the processing device to perform a flow of a method of driving a display panel.
The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be stored by a computer or data storage devices such as servers, data centers, etc. that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid State Disks (SSDs)), among others.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus, device, and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
While preferred embodiments of the present description have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present specification without departing from the spirit or scope of the specification. Thus, if such modifications and variations of the present specification fall within the scope of the claims and the equivalents thereof, the present specification is also intended to include such modifications and variations.

Claims (18)

1. A display panel, comprising:
the common electrode is electrically connected with at least one near-end pin at one end close to the driving chip, and at least one far-end pin at one end far away from the driving chip;
the electrical test pin is used for transmitting an electrical test signal to a display device of the display panel and is electrically connected with the far-end pin;
the driving chip is used for transmitting a first common voltage signal to the common electrode through the near-end pin and transmitting a second common voltage signal to the common electrode through the electrical test pin and the far-end pin;
the start time of the first common voltage signal transmitted by the driving chip is delayed by a set time relative to the start time of the second common voltage signal.
2. The display panel of claim 1, wherein the second common voltage signal is greater than the first common voltage signal.
3. The display panel of claim 2, wherein the second common voltage signal is determined by an amount of voltage that decays during a transfer of a third common voltage signal from the proximal pin to the distal pin, wherein the first common voltage signal and the second common voltage signal are both less than the third common voltage signal.
4. The display panel of claim 1, wherein the set time is determined by a time elapsed for the common voltage signal to be transmitted from the driver chip to the remote pin.
5. The display panel of claim 1, wherein a switch assembly is disposed between the electrical test pin and the distal pin.
6. The display panel of claim 5, wherein the switch assembly is configured to receive a shutdown signal for shutting down the switch assembly in the event the electrical test signal is transmitted to the display device via the electrical test pin;
the switch assembly is configured to receive an on signal for turning on the switch assembly in the case that the common voltage signal is transmitted to the common electrode through the electrical test pin and the remote pin.
7. The display panel of claim 6, wherein the switching assembly comprises a thin film transistor having a gate for receiving the off signal or the on signal.
8. The display panel of claim 1, wherein the number of proximal pins is at least two and the number of distal pins is at least two.
9. The display panel of claim 1, further comprising:
the touch electrodes are electrically connected with the driving chip;
the driving chip is used for driving the display device and the touch electrode.
10. A driving method of a display panel, comprising:
in the electrical testing stage, transmitting an electrical testing signal to a display device of the display panel through an electrical testing pin;
in a display stage, a drive chip is utilized to transmit a public voltage signal to a public electrode through a near-end pin, and the public voltage signal is transmitted to the public electrode through an electrical test pin and a far-end pin, wherein one end of the public electrode, which is close to the drive chip, is electrically connected with at least one near-end pin, one end of the public electrode, which is far away from the drive chip, is electrically connected with at least one far-end pin, and the electrical test pin is electrically connected with the far-end pin;
the common voltage signal includes a first common voltage signal and a second common voltage signal, and in a display stage, transmitting the common voltage signal to a common electrode through a near-end pin and transmitting the common voltage signal to the common electrode through the electrical test pin and a far-end pin by using a driving chip, comprising:
In a display stage, the driving chip is utilized to transmit the second common voltage signal to the common electrode through the electrical test pin and the far-end pin;
and after the set time, transmitting the first common voltage signal to the common electrode through the near-end pin by using the driving chip.
11. The driving method of a display panel according to claim 10, wherein the second common voltage signal is greater than the first common voltage signal.
12. The method according to claim 10, wherein the driving method further comprises, before the driving chip is used to transmit the second common voltage signal to the common electrode through the electrical test pin and the remote pin in the display stage:
transmitting a third public voltage signal to the public electrode through the near-end pin, and collecting the voltage on the far-end pin to obtain a far-end public voltage;
performing difference operation on the third common voltage signal and the far-end common voltage to obtain an attenuation voltage;
and carrying out addition operation on the first public voltage signal and the attenuation voltage to obtain the second public voltage signal.
13. The method for driving a display panel according to claim 10, further comprising:
and pre-testing the time of the second common voltage signal transmitted from the driving chip to the far-end pin, and taking the time obtained by testing as the set time.
14. The driving method of a display panel according to claim 12, wherein the third common voltage signal is twice the first common voltage signal.
15. The method for driving a display panel according to claim 12, further comprising:
transmitting a closing signal to a switch assembly in the electrical testing stage and in the process of collecting the voltage on the far-end pin, wherein the switch assembly is arranged between the electrical testing pin and the far-end pin, and the closing signal is used for closing the switch assembly;
and transmitting an opening signal to the switch assembly in the process of transmitting the second common voltage signal to the common electrode through the electrical test pin and the far-end pin, wherein the opening signal is used for opening the switch assembly.
16. The method for driving a display panel according to claim 10, further comprising:
In the display stage, a duty ratio of a scan driving signal driving the display device is adjusted.
17. A controller, comprising:
a memory in which a computer program is stored;
a processor for implementing the driving method of a display panel according to any one of claims 10-16 when executing the computer program.
18. A display device, comprising:
the display panel of any one of claims 1-9, and/or the controller of claim 17.
CN202210422806.4A 2022-04-21 2022-04-21 Display panel, driving method and related equipment Active CN114664251B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN106909253A (en) * 2017-03-07 2017-06-30 厦门天马微电子有限公司 Touch-control display panel and touch control display apparatus
CN106919287A (en) * 2017-03-08 2017-07-04 上海中航光电子有限公司 A kind of touch-control display panel and touch control display apparatus
CN113380864A (en) * 2021-05-31 2021-09-10 京东方科技集团股份有限公司 Display device and mother board

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CN109523943B (en) * 2018-12-28 2023-06-20 厦门天马微电子有限公司 Display panel and display device

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Publication number Priority date Publication date Assignee Title
CN106909253A (en) * 2017-03-07 2017-06-30 厦门天马微电子有限公司 Touch-control display panel and touch control display apparatus
CN106919287A (en) * 2017-03-08 2017-07-04 上海中航光电子有限公司 A kind of touch-control display panel and touch control display apparatus
CN113380864A (en) * 2021-05-31 2021-09-10 京东方科技集团股份有限公司 Display device and mother board

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