CN113314066A - Gate drive circuit and mobile terminal - Google Patents

Gate drive circuit and mobile terminal Download PDF

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Publication number
CN113314066A
CN113314066A CN202110632486.0A CN202110632486A CN113314066A CN 113314066 A CN113314066 A CN 113314066A CN 202110632486 A CN202110632486 A CN 202110632486A CN 113314066 A CN113314066 A CN 113314066A
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nth
stage
module
signal
output
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曹海明
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN202110632486.0A priority Critical patent/CN113314066A/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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides a grid drive circuit and a mobile terminal, the grid drive circuit comprises a multi-stage grid drive unit, the Nth stage grid drive unit comprises an Nth scanning stage transmission module, an Nth stage display output module and an Nth stage fingerprint output module, wherein, the Nth scanning stage transmission module is used for inputting Nth scanning control signals to the Nth stage display output module and the Nth stage fingerprint output module, so that the Nth stage display output module outputs Nth stage display output signals and the Nth stage fingerprint output module outputs Nth stage fingerprint output signals, because the grid drive circuit provided by the invention, the Nth scanning stage transmission module can control the Nth stage display output module and the Nth stage fingerprint output module, the scanning stage transmission circuit for controlling the Nth stage fingerprint output module is not required to be separately designed, the occupation area of the gate driving circuit in the display device is effectively reduced.

Description

Gate drive circuit and mobile terminal
Technical Field
The invention relates to the technical field of display panels, in particular to a gate driving circuit and a mobile terminal.
Background
A Gate Driver On Array (GOA) is an important component of a display device, and is a technology for manufacturing a Gate line scan driving signal circuit of a thin film transistor On an Array substrate by using an Array process of a conventional thin film transistor liquid crystal display to realize a driving mode of scanning gates line by line.
With the development of display technology, the display device has an increased fingerprint control function, but in the prior art, a gate driving circuit having a fingerprint module needs to separately design a scan stage transmission circuit for controlling the output of the fingerprint module, so that the gate driving circuit occupies a larger area in the display device.
Disclosure of Invention
The invention provides a gate driving circuit and a mobile terminal, which effectively solve the problem that the gate driving circuit with a fingerprint module in the prior art occupies a larger area in a display device because a scanning stage transmission circuit for controlling the output of the fingerprint module needs to be independently designed.
In order to solve the above problems, the present invention provides a gate driving circuit, which includes a multi-stage gate driving unit, wherein the nth stage gate driving unit includes an nth stage scanning stage transmission module, an nth stage display output module, and an nth stage fingerprint output module, wherein:
the nth scanning-level pass module is used for outputting an nth gate driving signal to the (N +2) th scanning-level pass module according to an (N-2) th gate driving signal and an nth clock signal during forward scanning of the gate driving circuit, and outputting the nth gate driving signal to the (N-2) th scanning-level pass module according to the (N +2) th gate driving signal and the nth clock signal during reverse scanning of the gate driving circuit;
and the nth scanning stage transmission module is further configured to input an nth scanning control signal to the nth display output module and the nth fingerprint output module according to the nth-2 or (N +2) th gate driving signal, so that the nth display output module outputs an nth display output signal according to the nth display control signal and the nth scanning control signal, and the nth fingerprint output module outputs an nth fingerprint output signal according to the nth fingerprint control signal and the nth scanning control signal.
Preferably, the nth stage scanning stage transmission module includes an nth stage forward and reverse scanning control module, and the nth stage forward and reverse scanning control module is configured to receive a forward scanning signal and the nth-2 stage gate driving signal during a forward scanning period of the gate driving circuit, and is configured to receive a reverse scanning signal and the (N +2) th stage gate driving signal during a reverse scanning period of the gate driving circuit.
Preferably, the nth scanning stage transmission module further includes an nth scanning voltage stabilizing module electrically connected to the nth forward and reverse scanning control module for receiving a high-potential dc voltage to prevent potential backflow when a potential of a signal output from the nth scanning voltage stabilizing module is higher than a potential of the nth scanning control signal.
Preferably, the nth stage scan stage transmission module further includes an nth stage scan output control module electrically connected to the nth stage scan voltage stabilizing module for receiving the nth stage clock signal to control output of the nth stage gate driving signal.
Preferably, the nth stage scan level transmission module further includes an nth stage global module, and the nth stage global module is electrically connected to the nth stage scan output control module, and is configured to receive a global control signal, and when the global control signal is in an active state, enable the nth stage scan level transmission module to enter a global scan stage and output the nth stage gate driving signal.
Preferably, the nth stage display output module includes an nth stage display voltage stabilizing module and an nth stage display output control module electrically connected to each other, the nth stage display voltage stabilizing module is configured to receive a high-potential dc voltage to prevent potential backflow when a potential of a signal input to the nth stage display output control module is higher than a potential of the nth stage scan control signal, and the nth stage display output control module is configured to receive the nth stage display control signal to control output of the nth stage display output signal.
Preferably, the nth fingerprint output module includes an nth fingerprint voltage regulator module and an nth fingerprint output control module electrically connected to each other, the nth fingerprint voltage regulator module is configured to receive a high-voltage dc voltage to prevent a potential backflow when a potential of a signal input to the nth fingerprint output control module is higher than a potential of the nth scanning control signal, and the nth fingerprint output control module is configured to receive the nth fingerprint control signal to control an output of the nth fingerprint output signal.
Further preferably, the nth level fingerprint output module further includes an N +1 th level fingerprint voltage stabilizing module and an N +1 th level fingerprint output control module electrically connected to each other.
Further preferably, the output modes of the nth-stage display output signal and the nth-stage fingerprint output signal include simultaneous output and time-sharing output.
In another aspect, the present invention further provides a mobile terminal, which includes any one of the gate driving circuits described above.
The invention has the beneficial effects that: the invention provides a grid driving circuit and a mobile terminal, wherein the grid driving circuit comprises a multi-stage grid driving unit, and an Nth-stage grid driving unit comprises an Nth-stage scanning stage transmission module, an Nth-stage display output module and an Nth-stage fingerprint output module, wherein: the Nth scanning-level transmission module is used for outputting an Nth gate driving signal to the (N +2) th scanning-level transmission module according to the (N-2) th gate driving signal and the Nth clock signal during the forward scanning of the gate driving circuit, and outputting the Nth gate driving signal to the (N-2) th scanning-level transmission module according to the (N +2) th gate driving signal and the Nth clock signal during the reverse scanning of the gate driving circuit; and wherein, the Nth scanning-level transmission module is further used for inputting an Nth scanning control signal to the Nth display output module and the Nth fingerprint output module according to an Nth-2-level gate driving signal or an N + 2-level gate driving signal, so that the Nth display output module outputs an Nth display output signal according to the Nth display control signal and the Nth scanning control signal, and the Nth fingerprint output module outputs an Nth fingerprint output signal according to the Nth fingerprint control signal and the Nth scanning control signal, because of the gate driving circuit provided by the invention, the Nth scanning control signal output by the Nth scanning-level transmission module can realize the control of the Nth display output module and the Nth fingerprint output module under the condition of respectively combining the Nth display control signal and the Nth fingerprint control signal, therefore, a scanning stage transmission circuit for controlling the Nth-stage fingerprint output module does not need to be designed independently, and the occupied area of the grid drive circuit in the display device is effectively reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments according to the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an nth-stage gate driving unit of a gate driving circuit according to an embodiment of the present invention.
Fig. 2 is a detailed structure diagram of an nth-stage gate driving unit of the gate driving circuit according to the embodiment of the invention.
Fig. 3 is a circuit timing diagram of an nth stage gate driving unit of the gate driving circuit according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Fig. 5 is a detailed structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Aiming at the problem that in the prior art, the gate drive circuit with the fingerprint module needs to independently design the scanning-level transmission circuit for controlling the output of the fingerprint module, so that the routing of the gate drive circuit is wider, the embodiment of the invention is used for solving the problem.
Referring to fig. 1, fig. 1 is a diagram illustrating an nth-stage gate driving unit 10 of a gate driving circuit according to an embodiment of the present inventionNThe gate driving circuit includes a multi-stage gate driving unit, an nth stage gate driving unit 10NComprises an Nth scanning stage transmission module 11NNth level display output module 12NAnd nth stage fingerprint output module 13NThe components of the embodiment according to the present invention and the relative positional relationship of the components can be seen most intuitively in fig. 1.
As shown in FIG. 1, during the forward scanning period of the gate driving circuit, the Nth scanning stage passes through the module 11NOutputs an Nth stage gate driving signal ST (N) according to the Nth-2 stage gate driving signal ST (N-2) and an Nth stage clock signal CK (N)To the (N +2) th scan stage transfer module, during the reverse scan period of the gate driving circuit, the (N) th scan stage transfer module 11NThe nth stage gate driving signal ST (N) is outputted to the nth-2 stage scan stage transmission module according to the (N +2) th stage gate driving signal ST (N +2) and the nth stage clock signal ck (N).
Further, the nth stage scan stage transmission module 11NBut also to the nth stage display output module 12 according to the nth-2 stage gate driving signal ST (N-2) or the (N +2) th stage gate driving signal ST (N +2)NAnd nth stage fingerprint output module 13NAfter inputting the nth scanning control signal q (N), the nth display output module 12NOutputs an Nth-level display output signal OUT _ D (N) and an Nth-level fingerprint output module 13 according to an Nth-level display control signal CK _ D (N) and an Nth-level scan control signal Q (N)NThe Nth stage fingerprint output signal OUT _ P (N) is output according to the Nth stage fingerprint control signal CK _ P (N) and the Nth stage scanning control signal Q (N).
Specifically, referring to fig. 2 and 3, fig. 2 is a diagram illustrating an nth-stage gate driving unit 10 of a gate driving circuit according to an embodiment of the present inventionNFig. 3 is a detailed structural diagram of an nth-stage gate driving unit 10 of the gate driving circuit according to the embodiment of the present inventionNA circuit timing diagram of (1).
Referring to fig. 3, as shown in fig. 2, an nth stage gate driving unit 10NThe nth stage scan stage transmission module 11NComprises an Nth-stage forward and reverse scanning control module 111NNth scanning voltage stabilizing module 112NNth-stage scan output control module 113NAnd an Nth level global module 114NWherein:
nth stage forward and reverse scanning control module 111NIncludes a first thin film transistor NT1 and a second thin film transistor NT2, wherein the source of the first thin film transistor NT1 receives a forward scan signal U2D, the gate of the first thin film transistor NT1 receives an N-2 th gate driving signal ST (N-2), the source of the second thin film transistor NT2 receives a reverse scan signal D2U, and the gate of the second thin film transistor NT2 receives an N +2 th gate driving signal ST (N +2)) And the forward direction scan signal U2D and the reverse direction scan signal D2U have opposite potentials. Specifically, during the forward direction scan of the gate driving circuit, when the gate of the first thin film transistor NT1 receives the N-2 th stage gate driving signal ST (N-2) at a high potential, the first thin film transistor NT1 is turned on, the forward direction scan signal U2D at a high potential is inputted from the source of the first thin film transistor NT1 and the drain of the first thin film transistor NT1 outputs the nth stage scan control signal q (N) at a high potential, during the reverse scan of the gate driving circuit, when the gate of the second thin film transistor NT2 receives the (N +2) th stage gate driving signal ST (N +2) at a high potential, the second thin film transistor NT2 is turned on, and the reverse scan signal D2U at a high potential is inputted from the source of the second thin film transistor NT2 and the drain of the second thin film transistor NT2 outputs the nth stage scan control signal q (N) at a high potential.
Nth stage scan voltage regulator module 112NIncludes a seventh TFT NT7, wherein the source of the seventh TFT NT7 and the Nth stage of the forward/backward scanning control module 111NThe drain of the first thin film transistor NT1 and the drain of the second thin film transistor NT2 are electrically connected, the gate of the seventh thin film transistor NT7 is connected to a high-voltage dc voltage VGH and is in a normally-on state, and is equivalent to a diode conducting from a point a to a point B, the nth scan regulator module 112NTo prevent the voltage stabilizing module 112 from scanning from the Nth stageNWhen the output signal Q2(N) is higher than the nth scan control signal Q (N), the potential flows backward, i.e. the potential at point B flows backward to point a, and the nth scan regulator module 112NThe signal Q2(n) at point B can be maintained at a high potential all the time. As shown in fig. 2, the capacitor C1 is used to maintain the high voltage at point a.
Nth-stage scanout control module 113NIncludes a ninth thin film transistor NT9, wherein the gate of the ninth thin film transistor NT9 and the Nth scan voltage-stabilizing module 112NThe drain of the seventh thin film transistor NT7 is electrically connected, and the source of the ninth thin film transistor NT9 receives the nth stage clock signal ck (N). Specifically, when the gate of the ninth thin film transistor NT9 receives the signal Q2 at a high potential from the point B(N), and the source of the ninth thin film transistor NT9 receives the nth stage clock signal ck (N) at the high potential, the drain of the ninth thin film transistor NT9 outputs the nth stage gate driving signal st (N) at the high potential.
Further, as shown in fig. 2, the nth stage scan stage transmission module 11NThe third thin film transistor NT3, the fourth thin film transistor NT4 and the eighth thin film transistor NT8 in the N-th scan stage pass module 11NNode signal control module (not numbered in the figure), nth stage scanning stage transmission module 11NThe fifth thin film transistor NT5, the sixth thin film transistor NT6 and the tenth thin film transistor NT10 in the N-th scan stage pass module 11NA pull-down module (not numbered in the figure). Wherein, the node signal control module is used for scanning the module 11 at the Nth levelNIn the non-working stage, the high-level enable signal is output to the pull-down module according to the N-2 stage clock signal and the (N +2) th stage clock signal, so that the pull-down module controls the Nth stage scan stage transmission module 11NThe nth stage gate driving signal st (N) of a low potential is output. The capacitor C2 is used for keeping the drain of the eighth tft NT8 and the source of the sixth tft NT6 at high voltage.
Nth level global module 114NAnd Nth scan output control module 113NElectrically connected, Nth level Global Module 114NIncluding an eleventh TFT NT11 and a twelfth TFT NT12, the Nth-stage global module 114NFor receiving the global control signal GAS1 and making the Nth scan stage pass module 11 when the global control signal GAS1 is in the active stateNAnd entering a global scanning stage to output an nth-stage gate driving signal st (N), wherein when the gate driving circuit is in the global scanning stage, the multi-stage gate driving units of the gate driving circuit are all in a working state.
Referring to fig. 2 and 3, the nth stage display output module 12NIncluding an electrically connected nth-stage display voltage stabilization module 121NAnd Nth-level display output control module 122NNth stage fingerprint output module 13NNth-stage fingerprint voltage stabilizing module 131 comprising electric connectionNAnd the Nth stageFingerprint output control module 132NWherein:
nth stage display voltage stabilizing module 121NIncludes a seventh a thin film transistor NT7A, wherein the source of the seventh a thin film transistor NT7A receives the nth scan control signal q (N), the gate of the seventh a thin film transistor NT7A is connected to a high level dc voltage VGH and is equivalent to a diode conducting from the point C to the point D, and the nth display voltage regulator module 121NFor preventing the current input to the Nth-level display output control module 122NWhen the potential of the signal is higher than that of the Nth scanning control signal Q (N), the potential flows backwards, that is, the potential at the point D flows backwards to the point C. Specifically, when the source of the seventh a thin film transistor NT7A receives the nth scan control signal q (N) at the high level, the drain of the seventh a thin film transistor NT7A outputs the high level signal to the nth display output control module 122N。
Nth level display output control module 122NIncludes a ninth A TFT NT9A, wherein the gate of the ninth A TFT NT9A and the Nth display voltage regulator module 121NThe drain of the seventh a thin film transistor NT7A is electrically connected, and the source of the ninth a thin film transistor NT9A receives the nth-level display control signal CK _ d (N). Specifically, when the gate of the ninth a thin film transistor NT9A receives the signal at the high potential from the point D and the source of the ninth a thin film transistor NT9A receives the nth-stage display control signal CK _ D (N) at the high potential, the drain of the ninth a thin film transistor NT9A outputs the nth-stage display output signal OUT _ D (N) at the high potential.
Further, the nth stage display output module 12NThe tenth A thin film transistor NT10A as the Nth stage display output module 12NA display pull-down module (not numbered in the figure), an nth stage display output module 12NThe eleventh A thin film transistor NT11A as the Nth stage display output module 12NThe first display global control module (not numbered in the figure), the nth stage display output module 12NThe thirteenth thin film transistor NT13A as the Nth stage display output module 12NThe first display global control module is used for receiving a global control signalGAS1 to make the Nth stage display output module 12NOutputting the Nth-level display output signal OUT _ D (N) at a high level, the second display global control module receiving the global control signal GAS2 to make the Nth-level display output module 12NThe nth stage display output signal OUT _ d (N) at the low potential is output.
Nth-level fingerprint voltage stabilizing module 131NThe fingerprint voltage stabilizing module 131 comprises a seventh B thin film transistor NT7B, wherein the source of the seventh B thin film transistor NT7B receives an Nth scanning control signal Q (N), the gate of the seventh B thin film transistor NT7B is connected with a high-potential direct-current voltage VGH equivalent to a diode which is conducted from a point E to a point F, and the Nth fingerprint voltage stabilizing module 131NFor preventing the input to the Nth stage fingerprint output control module 132NWhen the potential of the signal (b) is higher than that of the Nth scanning control signal Q (N), the potential flows backwards, that is, the potential at the point F flows backwards to the point E. Specifically, when the source of the seventh B thin film transistor NT7B receives the nth scan control signal q (N) at a high level, the drain of the seventh B thin film transistor NT7B outputs a high level signal to the nth fingerprint output control module 132N。
Nth-stage fingerprint output control module 132NIncludes a ninth B TFT NT9B, wherein the gate of the ninth B TFT NT9B and the Nth stage fingerprint voltage regulator module 131NThe drain electrode of the seventh B thin film transistor NT7B is electrically connected, and the source electrode of the ninth B thin film transistor NT9B receives the nth-level fingerprint control signal CK _ p (N). Specifically, when the gate of the ninth B thin film transistor NT9B receives the signal at the high potential from the point F and the source of the ninth B thin film transistor NT9B receives the nth-stage fingerprint control signal CK _ p (N) at the high potential, the drain of the ninth B thin film transistor NT9B outputs the nth-stage fingerprint output signal OUT _ p (N) at the high potential.
Further, the nth stage fingerprint output module 13NThe tenth B thin film transistor NT10B as the Nth stage fingerprint output module 13NThe fingerprint pull-down module (not numbered in the figure), the nth stage fingerprint output module 13NThe thirteenth thin film transistor NT13B as the Nth stage fingerprint output module 13NA first fingerprint global control module (not numbered in the figure),the first fingerprint global control module is used for receiving the global control signal GAS2 to make the Nth stage fingerprint output module 13NOutputs the nth stage fingerprint output signal OUT _ p (N) at the low potential.
It should be noted that the global control signal GAS1 in the active state is used to set all the gate driving signals in the gate driving circuit to the level of the active state, so as to scan the display device at the same time, thereby eliminating the residual charge of each pixel when the display device enters the black wake-up stage from the black stage to solve the problem of the afterimage when the display device is turned on; the global control signal GAS2 in active state is used to turn off all the output terminals of the gate driving units to suspend cascading when the touch scanning phase arrives, so as to prevent interference between the display output signal and the fingerprint output signal.
Further, as shown in FIG. 2, the Nth stage fingerprint output module 13NThe fingerprint voltage stabilizing module 131 of the (N + 1) th level electrically connected is also includedN+1And an N +1 th stage fingerprint output control module 132N+1。
Further, the output modes of the nth stage display output signal OUT _ d (N) and the nth stage fingerprint output signal OUT _ p (N) may be output simultaneously or in a time-sharing manner.
Different from the prior art, the present invention provides a gate driving circuit, which includes a plurality of stages of gate driving units, and an nth stage of gate driving unit 10NComprises an Nth scanning stage transmission module 11NNth level display output module 12NAnd nth stage fingerprint output module 13NWherein: nth-level scanning stage transmission module 11NFor outputting an nth gate driving signal ST (N) to an (N +2) th scan stage transfer module according to the (N-2) th gate driving signal ST (N-2) and an nth clock signal CK (N) during a forward scan of the gate driving circuit, and for outputting an nth gate driving signal ST (N) to the (N-2) th scan stage transfer module according to the (N +2) th gate driving signal ST (N +2) and the nth clock signal CK (N) during a reverse scan of the gate driving circuit; and wherein the Nth scanning stage transmission module 11NAnd is also used for driving the gate according to the N-2 th levelST (N-2) or the (N +2) th stage gate driving signal ST (N +2) to the Nth stage display output module 12NAnd nth stage fingerprint output module 13NThe Nth scanning control signal Q (N) is inputted to make the Nth display output module 12NOutputting an Nth-level display output signal OUT _ D (N) according to the Nth-level display control signal CK _ D (N) and the Nth-level scan control signal Q (N), and enabling the Nth-level fingerprint output module 13NThe nth stage fingerprint output signal OUT _ p (N) is output according to the nth stage fingerprint control signal CK _ p (N) and the nth stage scanning control signal q (N), and the nth stage scanning stage transmission module 11 is provided by the gate driving circuit of the present inventionNThe output nth level scan control signal q (N) can be combined with the nth level display control signal CK _ d (N) and the nth level fingerprint control signal CK _ p (N), respectively, to realize the nth level display output module 12NAnd nth stage fingerprint output module 13NSo that it is not necessary to separately design and control the nth stage fingerprint output module 13NThe scanning stage transmission circuit effectively reduces the occupied area of the grid drive circuit in the display device.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention, in which the gate driving circuit is applied to the mobile terminal, the mobile terminal may be a smart phone or a tablet computer, and the components and the relative position relationship of the components of the present invention can be visually seen from the diagram.
As shown in fig. 4, the mobile terminal 100 includes a processor 101, a memory 102. The processor 101 is electrically connected to the memory 102.
The processor 101 is a control center of the mobile terminal 100, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or loading an application program stored in the memory 102 and calling data stored in the memory 102, thereby performing overall monitoring of the mobile terminal.
Referring to fig. 5, fig. 5 is a detailed structure schematic diagram of a mobile terminal according to an embodiment of the present invention, where the mobile terminal may be a smart phone or a tablet computer, and components and relative positions of the components of the present invention can be visually seen from the diagram.
Fig. 5 is a block diagram illustrating a specific structure of the mobile terminal 100 according to an embodiment of the present invention. As shown in fig. 5, the mobile terminal 100 may include Radio Frequency (RF) circuitry 110, memory 120 including one or more computer-readable storage media, an input unit 130, a display unit 140, a sensor 150, audio circuitry 160, a transmission module 170 (e.g., Wireless Fidelity (WiFi), a Wireless Fidelity (wi-fi)), a processor 180 including one or more processing cores, and a power supply 190. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 5 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The RF circuit 110 is used for receiving and transmitting electromagnetic waves, and performs interconversion between the electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices. The RF circuitry 110 may include various existing circuit components for performing these functions, such as antennas, radio frequency transceivers, digital signal processors, encryption/decryption chips, Subscriber Identity Module (SIM) cards, memory, and so forth. The RF circuitry 110 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., Institute of Electrical and Electronics Engineers (IEEE) standard IEEE802.11 a, IEEE802.11 b, IEEE802.11g, and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide mail Access (Microwave Access for micro), wimax-1, other suitable short message protocols, and any other suitable Protocol for instant messaging, and may even include those protocols that have not yet been developed.
The memory 120 may be configured to store software programs and modules, such as corresponding program instructions in the above audio power amplifier control method, and the processor 180 executes various functional applications and data processing by operating the software programs and modules stored in the memory 120, that is, obtains the frequency of the information transmission signal transmitted by the mobile terminal 100. Generating interference signals, and the like. Memory 120 may include high speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 120 may further include memory located remotely from the processor 180, which may be connected to the mobile terminal 100 through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input unit 130 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 130 may include a touch-sensitive surface 131 as well as other input devices 132. The touch-sensitive surface 131, also referred to as a touch display screen or a touch pad, may collect touch operations by a user on or near the touch-sensitive surface 131 (e.g., operations by a user on or near the touch-sensitive surface 131 using a finger, a stylus, or any other suitable object or attachment), and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 131 may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 180, and can receive and execute commands sent by the processor 180. Additionally, the touch-sensitive surface 131 may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch-sensitive surface 131, the input unit 130 may also include other input devices 132. In particular, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 140 may be used to display information input by or provided to a user and various graphic user interfaces of the mobile terminal 100, which may be configured by graphics, text, icons, video, and any combination thereof. The Display unit 140 may include a Display panel 141, and optionally, the Display panel 141 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 131 may cover the display panel 141, and when a touch operation is detected on or near the touch-sensitive surface 131, the touch operation is transmitted to the processor 180 to determine the type of the touch event, and then the processor 180 provides a corresponding visual output on the display panel 141 according to the type of the touch event. Although in the figures touch-sensitive surface 131 and display panel 141 are shown as two separate components to implement input and output functions, in some embodiments touch-sensitive surface 131 may be integrated with display panel 141 to implement input and output functions.
The mobile terminal 100 may also include at least one sensor 150, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 141 according to the brightness of ambient light, and a proximity sensor that may generate an interrupt when the folder is closed or closed. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured in the mobile terminal 100, detailed descriptions thereof are omitted.
Audio circuitry 160, speaker 161, and microphone 162 may provide an audio interface between a user and mobile terminal 100. The audio circuit 160 may transmit the electrical signal converted from the received audio data to the speaker 161, and convert the electrical signal into a sound signal for output by the speaker 161; on the other hand, the microphone 162 converts the collected sound signal into an electric signal, converts the electric signal into audio data after being received by the audio circuit 160, and then outputs the audio data to the processor 180 for processing, and then to the RF circuit 110 to be transmitted to, for example, another terminal, or outputs the audio data to the memory 120 for further processing. The audio circuit 160 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal 100.
The mobile terminal 100, which can assist the user in receiving requests, transmitting information, etc., through the transmission module 170 (e.g., Wi-Fi module), provides the user with wireless broadband internet access. Although the transmission module 170 is shown in the drawings, it is understood that it does not belong to the essential constitution of the mobile terminal 100 and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 180 is a control center of the mobile terminal 100, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal 100 and processes data by operating or executing software programs and/or modules stored in the memory 120 and calling data stored in the memory 120, thereby integrally monitoring the mobile terminal. Optionally, processor 180 may include one or more processing cores; in some embodiments, the processor 180 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 180.
The mobile terminal 100 may also include a power supply 190 (e.g., a battery) for powering the various components, which may be logically coupled to the processor 180 via a power management system that may be used to manage charging, discharging, and power consumption management functions in some embodiments. The power supply 190 may also include any component including one or more of a dc or ac power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
Although not shown, the mobile terminal 100 further includes a camera (e.g., a front camera, a rear camera, etc.), a bluetooth module, a flashlight, etc., which will not be described herein. Specifically, in the present embodiment, the display unit of the mobile terminal 100 is a touch screen display.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by using equivalents or equivalent substitutions fall within the protection scope of the claims of the present invention.
In summary, although the preferred embodiments of the present invention have been described above, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. The grid driving circuit is characterized by comprising a multi-stage grid driving unit, wherein the Nth-stage grid driving unit comprises an Nth-stage scanning stage transmission module, an Nth-stage display output module and an Nth-stage fingerprint output module, wherein:
the nth scanning-level pass module is used for outputting an nth gate driving signal to the (N +2) th scanning-level pass module according to an (N-2) th gate driving signal and an nth clock signal during forward scanning of the gate driving circuit, and outputting the nth gate driving signal to the (N-2) th scanning-level pass module according to the (N +2) th gate driving signal and the nth clock signal during reverse scanning of the gate driving circuit;
and the nth scanning stage transmission module is further configured to input an nth scanning control signal to the nth display output module and the nth fingerprint output module according to the nth-2 or (N +2) th gate driving signal, so that the nth display output module outputs an nth display output signal according to the nth display control signal and the nth scanning control signal, and the nth fingerprint output module outputs an nth fingerprint output signal according to the nth fingerprint control signal and the nth scanning control signal.
2. The gate driving circuit according to claim 1, wherein the nth stage scanning stage transmission module comprises an nth stage forward and reverse scanning control module, and the nth stage forward and reverse scanning control module is configured to receive a forward scanning signal and the nth-2 stage gate driving signal during a forward scanning period of the gate driving circuit, and is configured to receive a reverse scanning signal and the (N +2) th stage gate driving signal during a reverse scanning period of the gate driving circuit.
3. The gate driving circuit of claim 2, wherein the nth stage scan stage transmission module further comprises an nth stage scan voltage stabilizing module electrically connected to the nth stage forward/reverse scan control module for receiving a high-level dc voltage to prevent a potential back-flow from occurring when a potential of a signal output from the nth stage scan voltage stabilizing module is higher than a potential of the nth stage scan control signal.
4. The gate driving circuit of claim 3, wherein the Nth scan stage transmission module further comprises an Nth scan output control module electrically connected to the Nth scan voltage stabilization module for receiving the Nth clock signal and controlling the output of the Nth gate driving signal.
5. The gate driving circuit of claim 4, wherein the Nth scan stage pass module further comprises an Nth global stage module, and the Nth global stage module is electrically connected to the Nth scan output control module for receiving a global control signal and enabling the Nth scan stage pass module to enter a global scan stage to output the Nth gate driving signal when the global control signal is in an active state.
6. The gate driving circuit of claim 1, wherein the nth stage display output module comprises an nth stage display voltage regulator module and an nth stage display output control module electrically connected to each other, the nth stage display voltage regulator module is configured to receive a high-level dc voltage to prevent a potential backflow from occurring when a potential of a signal input to the nth stage display output control module is higher than a potential of the nth stage scan control signal, and the nth stage display output control module is configured to receive the nth stage display control signal to control an output of the nth stage display output signal.
7. The gate driving circuit of claim 1, wherein the nth stage fingerprint output module comprises an nth stage fingerprint voltage regulator module and an nth stage fingerprint output control module electrically connected to each other, the nth stage fingerprint voltage regulator module is configured to receive a high-voltage dc voltage to prevent a voltage backflow from occurring when a voltage level of a signal input to the nth stage fingerprint output control module is higher than a voltage level of the nth stage scan control signal, and the nth stage fingerprint output control module is configured to receive the nth stage fingerprint control signal to control an output of the nth stage fingerprint output signal.
8. The gate driving circuit of claim 7, wherein the nth stage fingerprint output module further comprises an N +1 th stage fingerprint voltage stabilizing module and an N +1 th stage fingerprint output control module electrically connected to each other.
9. The gate driving circuit of claim 1, wherein the nth stage display output signal and the nth stage fingerprint output signal are output in a manner including simultaneous output and time-sharing output.
10. A mobile terminal, characterized in that it comprises a gate drive circuit according to any of claims 1-9.
CN202110632486.0A 2021-06-07 2021-06-07 Gate drive circuit and mobile terminal Pending CN113314066A (en)

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