CN109243372B - GOA drive circuit, display screen and display device - Google Patents
GOA drive circuit, display screen and display device Download PDFInfo
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- CN109243372B CN109243372B CN201811275553.2A CN201811275553A CN109243372B CN 109243372 B CN109243372 B CN 109243372B CN 201811275553 A CN201811275553 A CN 201811275553A CN 109243372 B CN109243372 B CN 109243372B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
Abstract
The invention provides a GOA driving circuit, a display screen and display equipment. Wherein, GOA drive circuit includes: a plurality of cascaded GOA driver units, a GOA driver unit, comprising: the input control module is used for carrying out input control on a scanning control signal Q point; the inverter module is connected with the input control module to realize Q point inversion under the input control of the input control module on the Q point; the feedback output stage module comprises a direct-current power supply driving end, a leakage prevention control module and a feedback receiving end, wherein the receiving end receives the feedback of the Q point, so that when the Q point has leakage feedback, the leakage prevention control module inhibits the leakage of the Q point under the driving of the direct-current power supply driving end; and the output module is connected with the feedback output stage module and is used for outputting the driving signals of the corresponding array substrate row. The GOA driving circuit has high stability, so that the display effect of a display screen is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a GOA driving circuit, a display screen and display equipment.
Background
The oxide backplane has the advantages of high mobility, good panel uniformity, high stability and the like, but the characteristics of a TFT (thin film Transistor) of the oxide backplane are also easily subjected to negative drift, which leads to false turn-On, in the related art, as shown in fig. 5, a Gate Driver On Array (Gate Driver On Array) circuit GOA (Gate Driver On Array) generates leakage current at the highest Q point from the Transistor T5 and the Transistor T6, which leads to the reduction of the Q point and the improvement of the error capability.
Disclosure of Invention
The present invention is directed to solving at least one of the above problems.
Therefore, an object of the present invention is to provide a GOA driving circuit. The GOA driving circuit has high stability, so that the display effect of the display screen is improved.
A second object of the invention is to provide a display screen.
A third object of the invention is to propose a display device.
In order to achieve the above object, an embodiment of a first aspect of the present invention discloses a GOA driving circuit, including: a plurality of cascaded GOA drive units, the GOA drive units comprising: the input control module is used for carrying out input control on a scanning control signal Q point; the phase inverter module is connected with the input control module so as to realize the inversion of the scanning control signal Q point under the input control of the input control module on the scanning control signal Q point; the feedback output stage module comprises a direct-current power supply driving end, an anti-leakage control module and a feedback receiving end, wherein the feedback receiving end receives feedback of a scanning control signal Q point, so that when leakage feedback exists at the scanning control signal Q point, the anti-leakage control module inhibits leakage of the scanning control signal Q point under the driving of the direct-current power supply driving end; and the output module is connected with the feedback output stage module and is used for outputting the driving signals of the corresponding array substrate row.
According to the GOA driving circuit provided by the embodiment of the invention, the electric leakage of the point Q of the scanning control signal can be eliminated, so that the GOA driving circuit has high stability, and the display effect of a display screen is improved.
In some examples, the leakage prevention control module of the feedback output stage module includes: the source electrode of the first transistor is connected with the driving end of the direct-current power supply, and the grid electrode of the first transistor is connected with the point Q of the scanning control signal; and the source electrode of the second transistor is connected with the drain electrode of the first transistor, and the drain electrode of the second transistor is grounded.
In some examples, the feedback output stage module further comprises: and the grid electrode and the drain electrode of the third transistor are connected with the drain electrode of the first transistor, and the source electrode of the third transistor is connected with the input control module.
In some examples, further comprising: and the noise elimination module is connected with the output module and is used for eliminating the noise of the scanning control signal Q point and the output noise of the output module after each frame is finished.
In some examples, further comprising: and the reset module is connected with the phase inverter module and is used for resetting the phase inverter module.
In some examples, further comprising: and the voltage pull-down module is connected with the inverter module and used for pulling down the voltage of the point Q of the scanning control signal to a low level when the point Q of the scanning control signal stops outputting.
In some examples, the inverter module includes: a gate of the fourth transistor is connected with a feedback receiving end of the feedback output stage module through a capacitor, and a source of the fourth transistor is connected with a first clock signal, so that the inverter module works when the first clock signal is at a high level; and the source electrode of the fifth transistor is connected with the drain electrode of the fourth transistor, the drain electrode of the fifth transistor is grounded, and the grid electrode of the fifth transistor is connected with the voltage pull-down module.
In some examples, the gate of the fifth transistor is further connected to the feedback output stage module.
An embodiment of a second aspect of the invention discloses a display screen, comprising: the GOA driver circuit of the first aspect described above. The display screen has stable and reliable display effect and prompts the display effect of the display screen.
An embodiment of a third aspect of the invention discloses a display device comprising: a display screen according to the second aspect described above. The display effect of the display equipment is stable and reliable, and the user experience of the display equipment is prompted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram of a GOA driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a GOA driver circuit according to an embodiment of the present invention;
fig. 3 is a timing diagram illustrating the operation of the GOA driving unit in the GOA driving circuit according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a cascade connection manner of the GOA driving units in the GOA driving circuit according to an embodiment of the present invention;
fig. 5a and 5b are a circuit diagram and a control timing diagram of a GOA driving circuit in the related art, respectively.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following describes a GOA driving circuit, a display screen and a display device according to embodiments of the present invention with reference to the accompanying drawings.
The GOA (Gate Driver On Array) driving circuit has been widely applied due to its advantages of low cost and high integration, and can be applied to, for example, AMOLED (Active Matrix/Organic Light emitting diode) display, where the AMOLED has the characteristics of faster response speed, higher contrast ratio, wider viewing angle, and the like, and thus, AMOLED has been receiving increasingly wide attention from display technology developers.
The GOA Array substrate line driving technology is to directly manufacture a driving circuit on an Array substrate to realize the display luminescence of a display screen. The GOA technology is adopted to save space and chip cost, reduce the external contact of the assembly, simplify signal processing and reduce power consumption.
Fig. 1 is a block diagram of a GOA driving circuit according to an embodiment of the present invention. As shown in fig. 1 in combination with fig. 2, a GOA driving circuit according to an embodiment of the present invention includes: a plurality of cascaded GOA driver units, a GOA driver unit, comprising: an input control module 110, an inverter module 120, a feedback output stage module 130, and an output module 140.
The input control module 110 is configured to perform input control on a point Q of the scan control signal. The inverter module 120 is connected to the input control module 110 to realize the Q-point inversion of the scan control signal under the input control of the input control module 110 to the Q-point of the scan control signal. The feedback output stage module 130 includes a dc power driving end VDD, an anti-leakage control module and a feedback receiving end, where the feedback receiving end receives feedback of the scanning control signal Q point, so that when there is leakage feedback of the scanning control signal Q point, the anti-leakage control module suppresses leakage of the scanning control signal Q point under driving of the dc power driving end VDD. The output module 140 is connected to the feedback output stage module 130, and is configured to output a driving signal of a corresponding row of the array substrate.
The following describes the structure of each block in the GOA driving circuit according to the embodiment of the present invention with reference to fig. 2.
As shown in fig. 2, the leakage prevention control module of the feedback output stage module 130 includes: a first transistor T15 and a second transistor T16. The source of the first transistor T15 is connected to the driving terminal VDD of the dc power supply, and the gate of the first transistor T15 is connected to the point Q of the scan control signal. The source of the second transistor T16 is connected to the drain of the first transistor T15, and the drain of the second transistor T16 is connected to the ground LVGL.
Further, the feedback output stage module 130 further includes: the gate and drain of the third transistor T17, the third transistor T17 are coupled to the drain of the first transistor T15, and the source of the third transistor T17 is coupled to the input control module 110.
The input control module 110 includes a transistor T1 and a transistor M1. The output module 140 includes a transistor T11 and a transistor T12.
The inverter module 120 includes: a fourth transistor T13 and a fifth transistor T14. The gate of the fourth transistor T13 is connected to the feedback receiving terminal of the feedback output stage module 130 through the capacitor C1, and the source of the fourth transistor T13 is connected to the first clock signal CLK1, so that the inverter module 120 operates when the first clock signal CLK1 is at a high level. The source of the fifth transistor T14 is connected to the drain of the fourth transistor T13, and the drain of the fifth transistor T14 is connected to ground, of course, the gate of the fifth transistor T14 is also connected to the feedback output stage module 130, and the gate of the fifth transistor T14 is connected to the voltage pull-down module. As shown in fig. 2, the inverter module 120 further includes a transistor T4, a transistor T5, a transistor T6, and a transistor T7.
Referring to fig. 1 and fig. 2, the working principle of the GOA driving circuit according to the embodiment of the present invention is as follows:
the input control module 110 is connected to the previous row of GOA driving unit cascade output CR1< n-1>, and is controlled by a clock signal clk2, wherein the timing of clk2 is shown in fig. 3. The inverter module 120 is an ac inverter module, and is designed to implement Q-point inversion, and since the clock signal CLK1 is at a high level and a low level, the inverter module 120 operates when the clock signal CLK1 is at a high level, which is beneficial to preventing the transistor T4 and the transistor T5 in the inverter module 120 from being affected by a large drift caused by a dc negative voltage.
The feedback output stage module 130 is a feedback output stage, one stage of direct current output is newly added, and is used as feedback in a way that the leakage of the Q point of the stage is easy to occur, meanwhile, a transistor T17 is added, so that the failure of the structure caused by negative pressure influence can be avoided, and therefore, the problem of Q point leakage caused by negative drift due to long-time negative pressure such as the transistor T1, the transistor M1, the transistor T3 and the transistor M3 can be effectively solved, and further, the reliability of the GOA driving circuit is improved.
The output module 140 is used for generating the driving signal of the row, and in a relatively large-sized display screen application, the transistor T11 should be as large as possible to ensure the driving capability.
As shown in fig. 2, the GOA driving circuit further includes: the noise elimination module T14 and the noise elimination module T14 are connected to the output module 140 for eliminating the noise of the scanning control signal Q point and the output noise of the output module 140 after each frame is finished. Namely: the transistor T14 is a noise removing unit for removing noise at the Q-point and the output at the end of each frame.
GOA drive circuit still includes: and the reset module is connected with the inverter module 120 and is used for resetting the inverter module 120, and the reset module comprises a transistor T2 and a transistor M2, wherein the transistor T2 and the transistor M2 are reset units at the end of each row, and are connected with a next row of cascade signals, and the cascade mode is as shown in fig. 4.
GOA drive circuit still includes: and a voltage pull-down module connected to the inverter module 120 and configured to pull down the voltage of the point Q of the scan control signal to a low level when the point Q of the scan control signal stops outputting. The voltage pull-down module includes transistor T3 and transistor M3. The transistor T3 and the transistor M3 are pull-down units of a Q point, and the Q point is guaranteed to be low when no output is generated through the QB point in the inverter module 120.
According to the GOA driving circuit provided by the embodiment of the invention, the electric leakage of the point Q of the scanning control signal can be eliminated, so that the GOA driving circuit has high stability, and the display effect of a display screen is improved.
Further, an embodiment of the present invention discloses a display screen, including: the GOA driver circuit according to any of the above embodiments. The display screen has stable and reliable display effect and prompts the display effect of the display screen.
Further, an embodiment of the present invention discloses a display device, including: the display screen according to the above embodiments. The display effect of the display equipment is stable and reliable, and the user experience of the display equipment is prompted.
The non-transitory computer readable storage medium described above may take any combination of one or more computer readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM) or flash Memory, an optical fiber, a portable compact disc Read Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of Network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A GOA driving circuit, comprising: a plurality of cascaded GOA drive units, the GOA drive units comprising:
the input control module is used for carrying out input control on a scanning control signal Q point;
the phase inverter module is connected with the input control module so as to realize the inversion of the scanning control signal Q point under the input control of the input control module on the scanning control signal Q point;
a feedback output stage module, the feedback output stage module includes a dc power supply driving end, a leakage prevention control module and a feedback receiving end, the feedback receiving end receives the feedback of the scanning control signal Q point, so that when there is leakage feedback at the scanning control signal Q point, the leakage prevention control module suppresses the leakage of the scanning control signal Q point under the driving of the dc power supply driving end, wherein the leakage prevention control module of the feedback output stage module includes:
the source electrode of the first transistor is connected with the driving end of the direct-current power supply, and the grid electrode of the first transistor is connected with the point Q of the scanning control signal;
a second transistor, wherein the source of the second transistor is connected with the drain of the first transistor, and the drain of the second transistor is grounded;
and the output module is connected with the feedback output stage module and is used for outputting the driving signals of the corresponding array substrate row.
2. The GOA driver circuit of claim 1, wherein the feedback output stage module further comprises:
and the grid electrode and the drain electrode of the third transistor are connected with the drain electrode of the first transistor, and the source electrode of the third transistor is connected with the input control module.
3. The GOA driver circuit of claim 1, further comprising:
and the noise elimination module is connected with the output module and is used for eliminating the noise of the scanning control signal Q point and the output noise of the output module after each frame is finished.
4. The GOA driver circuit of claim 1, further comprising:
and the reset module is connected with the phase inverter module and is used for resetting the phase inverter module.
5. The GOA driver circuit of claim 1, further comprising:
and the voltage pull-down module is connected with the inverter module and used for pulling down the voltage of the point Q of the scanning control signal to a low level when the point Q of the scanning control signal stops outputting.
6. The GOA driving circuit according to claim 5, wherein the inverter module comprises:
a gate of the fourth transistor is connected with a feedback receiving end of the feedback output stage module through a capacitor, and a source of the fourth transistor is connected with a first clock signal, so that the inverter module works when the first clock signal is at a high level;
and the source electrode of the fifth transistor is connected with the drain electrode of the fourth transistor, the drain electrode of the fifth transistor is grounded, and the grid electrode of the fifth transistor is connected with the voltage pull-down module.
7. The GOA driving circuit as claimed in claim 6, wherein the gate of the fifth transistor is further connected to the feedback output stage module.
8. A display screen, comprising: a GOA driving circuit according to any of the claims 1-7.
9. A display device, comprising: the display screen of claim 8.
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| CN201811275553.2A CN109243372B (en) | 2018-10-30 | 2018-10-30 | GOA drive circuit, display screen and display device |
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| CN201811275553.2A CN109243372B (en) | 2018-10-30 | 2018-10-30 | GOA drive circuit, display screen and display device |
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| CN111261108A (en) * | 2020-02-11 | 2020-06-09 | 深圳市华星光电半导体显示技术有限公司 | Gate drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108091308A (en) * | 2017-12-08 | 2018-05-29 | 武汉华星光电技术有限公司 | A kind of GOA circuits |
| CN108648686A (en) * | 2018-07-27 | 2018-10-12 | 京东方科技集团股份有限公司 | Shift register cell and gate driving circuit |
| CN108711401A (en) * | 2018-08-10 | 2018-10-26 | 京东方科技集团股份有限公司 | Shift register cell, gate driving circuit, display device and driving method |
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| KR102084716B1 (en) * | 2013-03-13 | 2020-03-05 | 삼성디스플레이 주식회사 | Display panel |
| KR102613407B1 (en) * | 2015-12-31 | 2023-12-13 | 엘지디스플레이 주식회사 | display apparatus, gate driving circuit and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108091308A (en) * | 2017-12-08 | 2018-05-29 | 武汉华星光电技术有限公司 | A kind of GOA circuits |
| CN108648686A (en) * | 2018-07-27 | 2018-10-12 | 京东方科技集团股份有限公司 | Shift register cell and gate driving circuit |
| CN108711401A (en) * | 2018-08-10 | 2018-10-26 | 京东方科技集团股份有限公司 | Shift register cell, gate driving circuit, display device and driving method |
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