CN110706667B - GOA circuit and display device - Google Patents
GOA circuit and display device Download PDFInfo
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- CN110706667B CN110706667B CN201910875933.8A CN201910875933A CN110706667B CN 110706667 B CN110706667 B CN 110706667B CN 201910875933 A CN201910875933 A CN 201910875933A CN 110706667 B CN110706667 B CN 110706667B
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- goa
- unit
- circuit
- output bus
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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
- G09G3/34—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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
- G02F1/136263—Line defects
Abstract
The invention provides a GOA circuit and a display device, comprising a COF circuit unit, a plurality of cascaded GOA units and a circuit repairing unit; the circuit repairing unit comprises a plurality of square parallel repairing wires; the COF circuit unit is provided with four output buses, the first-stage GOA unit is provided with four input ends, and each stage of the GOA units except the first-stage GOA unit in the plurality of cascaded GOA units is provided with five input ends. After the backboard is prepared, most of the disconnection problems of the lines of the GOA module can be repaired only by simple laser repair, and adverse effects can not be introduced basically, so that the product yield can be greatly improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a GOA circuit and a display device.
Background
The development direction of the new generation of flat panel display technology is high contrast, high resolution, narrow frame and thin. On the way to pursue these objectives, the technology of gate driving by goa (gate Driver on array) driving circuit is very important, and has been widely applied in the field of liquid crystal display.
In a conventional GOA circuit, a plurality of GOA units are usually included in a cascade, and each GOA unit drives one level of horizontal scanning line. Usually, the GOA units of the first four stages are controlled to be turned on or off by an externally input low-frequency signal, and the GOA units of the other stages need to be turned on or off by the GOA unit of the first stage and the GOA unit of the next stage. Therefore, each grade of GOA unit in the GOA circuit has close relation with the previous grade and the next grade of GOA unit. When a certain grade of GOA unit in the GOA circuit breaks down, other grade GOA units related to the grade GOA unit also break down, and then the whole display panel cannot normally work and is scrapped, so that the yield of products is reduced.
By analyzing the circuit characteristics of the GOA technology, the fact that the normal operation of circuit wiring is guaranteed is important to the yield and the stability of the whole panel.
Disclosure of Invention
The invention provides a GOA circuit and a display device, wherein three connection faults of a GOA driving circuit can be repaired by designing a novel repairing line parallel to the GOA circuit, and extra repairing line resistance is basically not introduced.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a GOA circuit, which comprises a COF circuit unit, a plurality of cascaded GOA units and a circuit repairing unit;
the circuit repairing unit comprises a plurality of square parallel repairing lines, and is separated from the COF circuit unit and the plurality of cascaded GOA units;
the COF circuit unit comprises four output buses which are a first output bus, a second output bus, a third output bus and a fourth output bus in sequence;
the first-stage GOA units of the plurality of cascaded GOA units comprise four input ends which are a first input end, a second input end, a third input end and a fourth input end in sequence;
in the plurality of cascaded GOA units, except for the first stage the GOA units, each stage the GOA units comprise five input ends, namely a first input end, a second input end, a third input end, a fourth input end and a fifth input end in sequence.
According to the GOA circuit provided by the embodiment of the present invention, an output terminal of an nth GOA unit of the plurality of cascaded GOA units is connected to an nth gate line, and an output terminal of the nth GOA unit is connected to the fifth input terminal of an N +1 th GOA unit.
According to the GOA circuit provided in the embodiments of the present invention, an output terminal of each of the plurality of cascaded GOA units is connected to an output bus of the COF circuit unit, and the first input terminal of each of the plurality of cascaded GOA units is connected to the first output bus; the second input end is connected with the second output bus; the third input end is connected with the third output bus; the fourth input is connected to the fourth output bus.
According to the GOA circuit provided by the embodiment of the invention, each square parallel repair line of the circuit repair unit intersects with four output buses of the COF circuit unit and all input lines and output lines of the GOA unit of each stage.
According to the GOA circuit provided by the embodiment of the invention, the circuit repairing unit is fused and welded through laser.
According to the GOA circuit provided by the embodiment of the invention, when the problem of wiring connection is generated between the output bus and the COF circuit unit, the square parallel repair line between the output bus and the COF circuit unit is fused and welded.
According to the GOA circuit provided by the embodiment of the invention, when the problem of routing connection is generated between the output bus and the GOA unit of any level, the square parallel repair line between the output bus and the GOA unit of any level is fused and welded.
According to the GOA circuit provided by the embodiment of the invention, when the problem of wiring connection is generated between the adjacent single-stage GOA circuits, the square parallel repair line between the adjacent single-stage GOA circuits is fused and welded.
According to the GOA circuit provided by the embodiment of the invention, the length of the metal routing is equal to that of the metal routing before repair after the square parallel repair lines are welded.
The embodiment of the invention also provides a display device, which comprises a display panel and a drive control device connected with the display panel, wherein the display panel is provided with a GOA circuit, and the GOA circuit is the GOA circuit in any one of the embodiments.
The invention has the beneficial effects that: in a general GOA level pass circuit, the problem of short circuit or open circuit of the line connection often occurs. After the design of the repairing wire is added, the back plate can be detected and repaired after being manufactured, and errors can be corrected in time, so that the product yield is improved. After the backboard is prepared, most of the disconnection problems of the lines of the GOA module can be repaired only by simple laser repair, and adverse effects can not be introduced basically, so that the product yield can be greatly improved, and the production cost is reduced.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a GOA circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a repair of a GOA circuit according to an embodiment of the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Fig. 1 is a schematic diagram of a GOA circuit according to an embodiment of the present invention. As can be seen from the figure, the GOA circuit includes a COF unit, a plurality of cascaded GOA units and a circuit repairing unit.
The circuit repairing units are a plurality of square parallel repairing lines. The circuit repairing unit needs to add another layer of metal in the GOA circuit manufacturing process, and is separated from the GOA circuit through the silicon oxide layer. And when the GOA circuit is disconnected, fusing and welding the circuit repairing unit through laser to repair the GOA circuit.
The COF unit is provided with four output buses which are a first output bus, a second output bus, a third output bus and a fourth output bus from left to right in sequence;
the first-stage GOA unit is provided with four input ends, namely a first input end, a second input end, a third input end and a fourth input end from left to right in sequence;
in the plurality of cascaded GOA units except for the first grade the GOA unit, each grade the GOA unit all has five inputs, turns right from a left side and is first input, second input, third input, fourth input and fifth input in proper order.
In the GOA circuit, an output terminal of an nth-level GOA unit of the plurality of cascaded GOA units is connected to an nth-level gate line, and an output terminal of the nth-level GOA unit is connected to the fifth input terminal of an N +1 th-level GOA unit.
Wherein an output of each of the plurality of cascaded GOA units is connected to an output bus of the COF, i.e., the first input of each of the plurality of cascaded GOA units is connected to the first output bus; the second input end is connected with the second output bus; the third input end is connected with the third output bus; the fourth input is connected to the fourth output bus.
In the GOA circuit, each square parallel repair line of the circuit repair unit is intersected with the four output buses of the COF unit and all input lines and output lines of the GOA unit of each stage. Because the circuit repairing unit is designed to be a square parallel repairing line, the repairing line can at least repair circuit connection errors of three different parts in the GOA circuit. Namely the problem of wiring connection between the output bus and the COF unit, and when the problem of wiring connection between the output bus and the COF unit occurs, the square parallel repair line between the output bus and the COF unit is fused and welded; when the output bus and the GOA units of any level have wiring connection problems, the square parallel repair lines between the output bus and the GOA units of any level are fused and welded; and when the problem of wiring connection is generated between the adjacent single-stage GOA circuits, the square parallel repair line between the adjacent single-stage GOA circuits is fused and welded.
Since the repair line and the GOA circuit in this embodiment are designed to be relatively parallel, the length of the incorrectly connected routing portion is substantially the same as the length of the newly connected repair line after repair before the circuit is repaired, that is, no additional repair resistor is introduced into the original circuit. Therefore, after the fusing and welding of the repair line are completed, no additional compensation processing needs to be performed on the input signal.
Specifically, as shown in fig. 2, a schematic diagram of the repair of the GOA circuit according to the embodiment of the present invention is provided. When the line shown as the part a in fig. 2 has the problem of disconnection, the repair line and the first output bus are only required to be fused together at the point 1 and the point 5 shown in the figure, and the connection between the repair line of the part and the repair line of the other part is simultaneously fused, so that the disconnection problem of the line shown as the part a in fig. 2 can be repaired. Because the bus width of the output bus is very small relative to the line length, the parallel repair line can basically keep the resistance distribution of the circuit unchanged after replacing the original broken part of the a part.
Similarly, when the line shown in the b part in fig. 2 is disconnected, the repair line and the fourth output bus are only required to be fused together at the points 12 and 18 shown in the figure, and the connection between the repair line of the part and the repair line of the other part is fused at the same time, so that the disconnection problem of the line shown in the b part in fig. 2 can be repaired; when the line shown in the part c in fig. 2 has the problem of disconnection, the repair line can be fused together at the points 13 and 14 shown in the figure, and the connection between the repair line of the part and the repair line of the other part is fused at the same time, so that the disconnection problem of the line shown in the part c in fig. 2 can be repaired.
Moreover, the repair range of the circuit repair unit in the GOA circuit in this embodiment is very wide, which can repair the disconnection problem between any two adjacent stages of transmission circuits, repair multiple disconnection problems on the output bus, and repair the single disconnection problem between each single stage of the GOA circuit and the output bus.
The beneficial effects are that: in a general GOA level pass circuit, the problem of short circuit or open circuit of the line connection often occurs. After the design of the repairing wire is added, the back plate can be detected and repaired after being manufactured, and errors can be corrected in time, so that the product yield is improved. After the backboard is prepared, most of the disconnection problems of the lines of the GOA module can be repaired only by simple laser repair, and adverse effects can not be introduced basically, so that the product yield can be greatly improved, and the production cost is reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, 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 (8)
1. A GOA circuit is characterized by comprising a COF circuit unit, a plurality of cascaded GOA units and a circuit repairing unit;
the circuit repairing unit comprises a plurality of square parallel repairing lines, and is separated from the COF circuit unit and the plurality of cascaded GOA units;
the COF circuit unit comprises four output buses which are a first output bus, a second output bus, a third output bus and a fourth output bus in sequence;
the first-stage GOA units of the plurality of cascaded GOA units comprise four input ends which are a first input end, a second input end, a third input end and a fourth input end in sequence;
each grade of GOA unit in the plurality of cascaded GOA units except the first grade GOA unit comprises five input ends which are a first input end, a second input end, a third input end, a fourth input end and a fifth input end in sequence;
wherein, the output end of each GOA unit in the plurality of cascaded GOA units is connected with the output bus of the COF circuit unit, and the first input end of each GOA unit is connected with the first output bus; the second input end is connected with the second output bus; the third input end is connected with the third output bus; the fourth input end is connected with the fourth output bus; each square parallel repair line of the circuit repair unit is intersected with the four output buses of the COF circuit unit and all input lines and output lines of the GOA unit at each stage.
2. The GOA circuit of claim 1, wherein an output of an nth level GOA unit of the plurality of cascaded GOA units is connected to an nth level gate line, and an output of the nth level GOA unit is connected to the fifth input of an N +1 th level GOA unit.
3. The GOA circuit of claim 1, wherein the circuit repair unit is fused and welded by a laser.
4. The GOA circuit according to claim 1, wherein when a wire connection problem occurs between the output bus and the COF circuit unit, the square parallel repair wire between the output bus and the COF circuit unit is fused and welded.
5. The GOA circuit according to claim 1, wherein when a routing connection problem occurs between the output bus and the GOA unit of any level, the square parallel repair line between the output bus and the GOA unit of any level is fused and welded.
6. The GOA circuit according to claim 1, wherein when a routing connection problem occurs between adjacent single-stage GOA circuits, the square parallel repair line between the adjacent single-stage GOA circuits is fused and welded.
7. The GOA circuit according to claim 1, wherein the length of the metal wire after welding the square parallel repair line is the same as the length of the metal wire before repair.
8. A display device, comprising a display panel and a driving control device connected to the display panel, wherein the display panel is provided with a GOA circuit, and the GOA circuit is the GOA circuit according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875933.8A CN110706667B (en) | 2019-09-17 | 2019-09-17 | GOA circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875933.8A CN110706667B (en) | 2019-09-17 | 2019-09-17 | GOA circuit and display device |
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| CN110706667A CN110706667A (en) | 2020-01-17 |
| CN110706667B true CN110706667B (en) | 2021-06-01 |
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| CN109884829A (en) * | 2018-12-29 | 2019-06-14 | 成都中电熊猫显示科技有限公司 | GOA display panel repair line configuration method, display panel and display device |
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