CN115171615B - Panel repair circuit, display panel and display device - Google Patents
Panel repair circuit, display panel and display device Download PDFInfo
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- CN115171615B CN115171615B CN202210521846.4A CN202210521846A CN115171615B CN 115171615 B CN115171615 B CN 115171615B CN 202210521846 A CN202210521846 A CN 202210521846A CN 115171615 B CN115171615 B CN 115171615B
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
Abstract
The application relates to a panel repair circuit, a display panel and display equipment. The circuit is connected with the driving chip through a first control end of the first multi-way switch, a first input end of the circuit is connected with the first signal wire, and each first output end of the circuit is connected with each first repair signal wire in a one-to-one correspondence manner; the first repair signal lines repair the fan-out wiring of the fan-out area, so that a plurality of first repair signal lines are provided for the display panel, and the problem of short circuit or open circuit of the fan-out wiring can be repaired; the second control end of the second multi-way switch is connected with the driving chip, the second input end of the second multi-way switch is connected with the second signal wire, and each second output end of the second multi-way switch is connected with each second repairing signal wire in a one-to-one correspondence manner; the second repair signal lines repair the display signal lines of the display area, so that a plurality of second repair signal lines are provided for the display panel, and then the problem of short circuit or open circuit of the signal lines of the display area can be repaired, thereby improving the repair rate of the panel, increasing the number of repairable wires and reducing the probability that products are irreparable.
Description
Technical Field
The application relates to the technical field of display processing, in particular to a panel repair circuit, a display panel and display equipment.
Background
With the development of display technology, the manufacturing process and the inspection technology of display panels have also been rapidly developed. Although the manufacturing process of the panel is improved year by year, the occurrence of defects cannot be completely avoided due to the complex structure and the numerous manufacturing processes of the panel. Such as LCD liquid crystal displays, for different production lines, different display products, and factors affecting the yield are different, wherein point defects, line defects, etc. are common causes of product failure. The point defect is the most common defect, and is divided into a bright point and a dark point, and the size of the defect is one pixel; the line defects are also divided into bright lines and dark lines, the size of the defects is a line segment with the width of a whole pixel, and the point defects and the line defects are electrical defects. In order to save the cost and improve the product qualification rate, the repair design of point defects and line defects is particularly important.
In the existing display panel repairing mechanism, the repairing rate of defects such as point defects, line defects and the like in the panel is low, and products are disqualified because the panel cannot be repaired.
Disclosure of Invention
Based on this, it is necessary to provide a panel repair circuit, a display panel and a display device capable of improving the repair rate of the panel and increasing the number of repairable wires and reducing the probability of the product encountering unrepairable products, aiming at the problems that the repair rate of defects such as point defects, line defects and the like in the panel is low and the products are unqualified due to unrepairable panels in the existing display panel repair mechanism.
In a first aspect, the present application provides a panel repair circuit comprising:
a plurality of first repair signal lines;
a first multiplexing circuit including a plurality of first multiplexing switches; each first multi-way switch comprises a first control end, a first input end and N first output ends; the first control end is used for connecting the driving chip, the first input end is used for connecting the first signal wires, and each first output end is correspondingly connected with each first repair signal wire one by one; the first repair signal line is used for repairing a fan-out wiring of a fan-out area of the display panel;
a plurality of second repair signal lines;
a second multi-way switch circuit including a plurality of second multi-way switches; each second multi-way switch comprises a second control end, a second input end and M second output ends; the second control end is used for connecting the driving chip, the second input end is used for connecting the second signal wires, and each second output end is correspondingly connected with each second repair signal wire one by one; the second repair signal line is used for repairing the display signal line of the display area of the display panel.
Optionally, the first multi-path switch circuit is disposed in the fan-out area of the display panel and is located below the display area of the display panel.
Optionally, the second multi-path switch circuit is disposed in the fan-out area of the display panel and above the display area of the display panel.
Optionally, the number of the second multiple switches is 4; wherein 2 second multiplexers are located on the left side above the display area of the display panel, and the remaining 2 second multiplexers are located on the right side above the display area of the display panel.
Optionally, the second multiplexer comprises at least 2 second outputs.
Optionally, the first multiplexer comprises at least 2 first outputs.
Optionally, each first output terminal is configured to output a first repair signal; the sum of the on time of the first repair signals is smaller than or equal to the gate charging time of the display panel.
Optionally, each second output terminal is configured to output a second repair signal; the sum of the on time of the second repair signals is smaller than or equal to the gate charging time of the display panel.
In a second aspect, the present application provides a display panel, where the display panel includes a display area, a fan-out area located at a periphery of the display area, and a panel repair circuit according to any one of the above disposed in the fan-out area.
In a third aspect, the present application provides a display device comprising a controller and a display panel as described above; the controller is connected with the display panel.
One of the above technical solutions has the following advantages and beneficial effects:
the panel repair circuit comprises a plurality of first repair signal lines, a first multi-way switch circuit, a plurality of second repair signal lines and a second multi-way switch circuit, wherein the first multi-way switch circuit comprises a plurality of first multi-way switches; each first multi-way switch comprises a first control end, a first input end and N first output ends; the first control end is connected with the driving chip, the first input end is connected with the first signal wires, and each first output end is connected with each first repair signal wire in a one-to-one correspondence manner; the first repair signal lines are used for repairing fan-out wires of the fan-out area of the display panel, so that a plurality of first repair signal lines are provided for the display panel, and further the problem of short circuit or open circuit of the fan-out wires can be effectively repaired; the second multi-way switch circuit comprises a plurality of second multi-way switches; each second multi-way switch comprises a second control end, a second input end and M second output ends; the second control end is used for connecting the driving chip, the second input end is used for connecting the second signal wires, and each second output end is correspondingly connected with each second repair signal wire one by one; the second repair signal lines are used for repairing the display signal lines of the display area of the display panel, so that a plurality of second repair signal lines are provided for the display panel, and then the problem of short circuit or open circuit of the signal lines of the display area can be effectively repaired, thereby improving the repair rate of the panel, increasing the number of repairable wires and reducing the probability that products are irreparable.
Drawings
FIG. 1 is a schematic diagram of a conventional panel repair mechanism.
Fig. 2 is a schematic diagram of a first structure of a panel repair circuit in an embodiment of the application.
Fig. 3 is a second schematic structural diagram of a panel repair circuit according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
As shown in fig. 1, the conventional repair mechanism for a display panel is provided with repair signal lines (for example, repair signal line 1, repair signal line 2, repair signal line 3 and repair signal line 4) connected to a power signal line below a display area, and repair signal lines (for example, repair signal line 1, repair signal line 2, repair signal line 3 and repair signal line 4) connected to a power signal line above a display area. The line defect refers to a defect of a sector wiring or a signal line disconnection. The point defect is a point defect such as a short circuit, an open circuit and the like of a metal wire in the thin film transistor caused by incomplete photoresist stripping and foreign matter residue in the manufacturing process of the thin film transistor, and the finished display panel is provided with bright spots, dark spots or bright lines when passing the test, so that the yield of the display panel is seriously affected.
In order to solve the problems that in the existing display panel repairing mechanism, the repairing rate of defects such as point defects, line defects and the like in the panel is low, and products are unqualified because the panel is irreparable, the repairing rate of the panel can be improved, the number of repairable wires is increased, and the probability that the products are subjected to unrepairable is reduced. In one embodiment, as shown in fig. 2, there is provided a panel repair circuit comprising: a plurality of first repair signal lines, a first multi-path switch circuit 10, a plurality of second repair signal lines, and a second multi-path switch circuit 20.
The first multiplexing circuit 10 includes a plurality of first multiplexing switches 110; each first multiplexer 110 includes a first control terminal, a first input terminal, and N first output terminals; the first control end is used for connecting the driving chip, the first input end is used for connecting the first signal wires, and each first output end is correspondingly connected with each first repair signal wire one by one; the first repair signal line is used for repairing the fan-out wiring of the fan-out area of the display panel. The second multiplexing circuit 20 includes a plurality of second multiplexing switches 210; each second multiplexer 210 includes a second control terminal, a second input terminal, and M second output terminals; the second control end is used for connecting the driving chip, the second input end is used for connecting the second signal wires, and each second output end is correspondingly connected with each second repair signal wire one by one; the second repair signal line is used for repairing the display signal line of the display area of the display panel.
The display panel comprises a display area and a fan-out area, wherein the fan-out area is arranged on the periphery of the display area. The display area is a pixel display area, a pixel unit is arranged in the display area, the pixel unit comprises a display signal line and sub-pixels, and the display signal line can be a power signal line, a data line or a scanning line. The fan-out area is internally provided with a driving circuit and a fan-out wiring, the driving circuit comprises a driving chip for driving a TFT (thin film transistor) source electrode, and the fan-out wiring can be a power signal line, a data line or a scanning line and other signal lines. The first repair signal line is used for repairing the fan-out wiring of the fan-out area of the display panel, and further repairing can be carried out by adopting the corresponding first repair signal line, so that the problem of repairing the short circuit or the open circuit of the corresponding fan-out wiring can be solved. The second repair signal line is used for repairing the signal line of the display area of the display panel, and further repairing the signal line of the corresponding display area can be achieved by adopting the corresponding second repair signal line.
The first multiplexing circuit 10 includes a plurality of first multiplexing switches 110, and the number of the first multiplexing switches 110 may be determined according to the number of driving chips. For example, the number of the first multiplexing switches 110 may be 2 times the number of driving chips in the display panel. The first multiplexer 110 includes a first control end, and the first control end is used for connecting with a corresponding driving chip, so that the driving chip transmits a control signal to the first multiplexer 110 to turn on the corresponding first multiplexer 110, and then the corresponding first output end of the first multiplexer 110 outputs a repair signal. The first multi-way switch 110 further includes a first input end and N first output ends, the first input end is connected to a first signal line, each first output end is connected to each first repair signal line in a one-to-one correspondence manner, when repairing based on the adopted corresponding first repair signal line, the corresponding first multi-way switch 110 is turned on, and then the first multi-way switch 110 can output repair signals according to the first signals input by the first signal lines, so that the corresponding first output ends output repair signals, and the problem of repairing the short circuit or open circuit of the corresponding fan-out line of the fan-out area of the corresponding display panel is achieved.
The second multiplexing circuit 20 includes a plurality of second multiplexing switches 210. The second multiplexer 210 includes a second control end, and the second control end is used for connecting with a corresponding driving chip, so that the driving chip transmits a control signal to the second multiplexer 210 to turn on the corresponding second multiplexer 210, and then the corresponding second output end of the second multiplexer 210 outputs a repair signal. The second multiplexer 210 further includes a second input end and M second output ends, where the second input end is connected to the second signal lines, each second output end is connected to each second repair signal line in a one-to-one correspondence manner, and when repairing based on the adopted corresponding second repair signal line, the corresponding second multiplexer 210 is turned on, so that the second multiplexer 210 can output repair signals according to the second signals input by the second signal lines, so as to repair the short circuit or disconnection problem of the corresponding signal line in the display area of the corresponding display panel.
Note that N is a natural number greater than 1, and M is a natural number greater than 1. In one example, N and M are the same value.
In the above embodiment, the driving chip is connected to the first control terminal of the first multiplexer 110, the first input terminal of the first multiplexer 110 is connected to the first signal line, and the first output terminal of each first multiplexer 110 is connected to each first repair signal line in a one-to-one correspondence manner; the first repair signal lines are used for repairing fan-out wires of the fan-out area of the display panel, so that a plurality of first repair signal lines are provided for the display panel, and further the problem of short circuit or open circuit of the fan-out wires can be effectively repaired; the second control end of the second multiplexer 210 is connected with the driving chip, the second input end of the second multiplexer 210 is used for being connected with a second signal line, and the second output end of each second multiplexer 210 is correspondingly connected with each second repairing signal line one by one; the second repair signal lines are used for repairing the display signal lines of the display area of the display panel, so that a plurality of second repair signal lines are provided for the display panel, and then the problem of short circuit or open circuit of the signal lines of the display area can be effectively repaired, thereby improving the repair rate of the panel, increasing the number of repairable wires and reducing the probability that products are irreparable.
In order to effectively utilize the space of the fan-out area of the display panel, reduce the area of the fan-out area, further realize the narrow frame degree of the display panel, increase the number of repairable wires in the fan-out area, and improve the repair rate of the panel, in one example, as shown in fig. 3, the first multi-way switch circuit is disposed in the fan-out area of the display panel and is located below the display area of the display panel.
For example, the display area is rectangular, the fan-out area is arranged at the periphery of the display area, and the fan-out area is provided with a driving circuit, a fan-out wire and the like. The driving circuit comprises a plurality of driving chips which are distributed at intervals. For example, if the number of the driving chips is 6, the 6 driving chips are arranged at intervals below the display area.
The first multi-way switch circuit is arranged in the fan-out area of the display panel and is positioned below the display area of the display panel. The first multi-way switch circuit includes a plurality of first multi-way switches arranged in an array, for example, 2 first multi-way switches are arranged above each driving chip at intervals. The 2 first multi-way switches above the driving chip are respectively connected with the driving chip through corresponding first control ends, and the driving chip transmits control signals to the first multi-way switches so as to enable the corresponding first multi-way switches to be conducted, and then corresponding first output ends of the first multi-way switches output repair signals. A first signal line is also disposed under the driving chip, wherein the first signal line may be, but is not limited to, a power signal line, a data line, or a scan line. The first output ends of the corresponding first multi-way switches are provided with first repair signal lines, each first output end is electrically connected with each first repair signal line in a one-to-one correspondence mode, the first input end of each first multi-way switch is connected with the first signal line, when the corresponding first repair signal line is adopted for repair, the corresponding first multi-way switch is conducted, and then the first multi-way switch can output repair signals according to the first signals input by the first signal lines, so that the short circuit or open circuit problem of corresponding fan-out wires in fan-out areas of corresponding display panels is repaired.
When the fan-out area of the display panel is broken, the corresponding first repair signal lines are selected from the N first repair signal lines below the display area in a laser Welding mode to replace broken lines, the selected first repair signal lines are subjected to laser Welding conduction, and the corresponding driving chips are controlled to output control signals, so that the repaired first repair signal lines can output repair signals, and further repair of broken lines of the fan-out area of the display panel is achieved. It should be noted that the different blocks select the first repair signal lines of the different blocks.
When the fan-out area of the display panel is short-circuited, the short-circuited wiring is disconnected in a laser disconnection mode based on the arrangement of the first multi-way switch circuits and the N first repair signal wires in the fan-out area, namely, after the laser cutting bad blocks are utilized. And then selecting a corresponding first repair signal wire from N first repair signal wires below the display area, replacing the short-circuit wiring to conduct laser welding, and controlling a corresponding driving chip to output a control signal, so that the repaired first repair signal wire can output a repair signal, and further repairing the fan-out wiring short circuit of the fan-out area of the display panel is realized. It should be noted that the different blocks select the first repair signal lines of the different blocks.
Note that, the IC in fig. 3 is a driving chip.
In order to effectively utilize the space of the fan-out area of the display panel, reduce the area of the fan-out area, further realize the narrow frame degree of the display panel, increase the number of repairable wires in the display area, and improve the repair rate of the display panel, in one example, as shown in fig. 3, the second multi-way switch circuit is disposed in the fan-out area of the display panel and is located above the display area of the display panel.
For example, the fan-out area is provided with a driving circuit, a fan-out wiring, and the like. The driving circuit comprises a plurality of driving chips which are distributed at intervals. For example, if the number of the driving chips is 6, the 6 driving chips are arranged at intervals below the display area.
The second multi-way switch circuit is arranged in the fan-out area of the display panel and is positioned above the display area of the display panel. The second multi-way switch circuit comprises a plurality of second multi-way switches, the first multi-way switches are arranged at intervals, and the number of the second multi-way switches is 4; wherein, 2 second multiple switches are located in the left side above the display area of the display panel, and the remaining 2 second multiple switches are located in the right side above the display area of the display panel. The first control end of each second multi-way switch is connected to a corresponding driving signal below the display area through a signal wiring, so that the driving chip transmits the control signal to the second multi-way switch to enable the corresponding second multi-way switch to be conducted, and the corresponding second output end of the second multi-way switch outputs a repair signal. A second signal line is also disposed under the driving chip, wherein the second signal line may be, but is not limited to, a power signal line, a data line, or a scan line. In one example, the second signal line and the first signal line are the same type of signal line.
The first output ends of the corresponding second multi-way switches are provided with second repair signal lines, each second output end is electrically connected with each second repair signal line in a one-to-one correspondence mode, the second input end of each second multi-way switch is connected with the second signal line, when the corresponding second repair signal line is adopted for repair, the corresponding second multi-way switch is conducted, and then the second multi-way switch can output repair signals according to second signals input by the second signal lines, so that the short circuit or open circuit problem of the corresponding signal line of the display area of the corresponding display panel is repaired.
When the display area of the display panel is broken, the corresponding second repair signal lines are selected from the M second repair signal lines above the display area in a laser Welding mode based on the arrangement of the second multi-way switch circuit and the M second repair signal lines in the fan-out area, the broken signal lines are replaced by the corresponding second repair signal lines, the selected second repair signal lines are conducted in a laser Welding mode, and the corresponding driving chip is controlled to output a control signal, so that the repaired second repair signal lines can output repair signals, and further broken repair of the signal lines in the display area of the display panel is realized. It should be noted that the different blocks select the second repair signal lines of the different blocks.
When the display area of the display panel is short-circuited, the short-circuited signal lines are disconnected in a laser disconnection mode based on the arrangement of the second multi-way switch circuits and the M second repair signal lines in the fan-out area, namely, after the bad blocks are disconnected by laser cutting. And then selecting a corresponding second repair signal line from M second repair signal lines above the display area, replacing the short circuit signal line to conduct laser welding, and controlling a corresponding driving chip to output a control signal, so that the repaired second repair signal line can output a repair signal, and further repairing the short circuit of the signal line of the display area of the display panel is realized. It should be noted that the different blocks select the second repair signal lines of the different blocks.
In one example, the second multiplexer includes at least 2 second outputs. For example, as shown in fig. 3, the second multi-way switch circuit includes 4 second multi-way switches, each second multi-way switch includes 3 second output ends, 12 second output ends are connected with 12 second repair signal lines in a one-to-one correspondence, when repairing is performed based on the adopted corresponding second repair signal lines, the corresponding second multi-way switch is turned on, and then the second multi-way switch can output repair signals according to second signals input by the second signal lines, so that the problem of repairing the short circuit or open circuit of the corresponding signal lines in the display area of the corresponding display panel is realized. By utilizing the advantages of the second multi-way switch, the original driving chip is driven to only provide 4 groups of repair signals (as shown in fig. 1) to be increased to 12 groups of repair signals (as shown in fig. 3), so that repair signal lines are increased, the repair rate of the panel is improved, and the probability that the product encounters unrepairable products is reduced.
Optionally, the first multiplexer comprises at least 2 first outputs. For example, as shown in fig. 3, the first multiple switch circuit includes 12 first multiple switches, each first multiple switch includes 3 first output ends, 36 first output ends are connected with 36 first repair signal lines in a one-to-one correspondence manner, when repairing is performed based on the adopted corresponding first repair signal lines, the corresponding first multiple switches are turned on, and then the first multiple switches can output repair signals according to first signals input by the first signal lines, so that the problem of repairing short circuits or open circuits of corresponding fan-out wires in fan-out areas of corresponding display panels is solved. By utilizing the advantages of the first multi-way switch, the original driving chip is driven to only provide 4 groups of repair signals (as shown in fig. 1) to be increased to 12 groups of repair signals (as shown in fig. 3), so that repair signal lines are increased, the repair rate of the panel is improved, and the probability that the product encounters unrepairable products is reduced.
In one example, each first output is configured to output a first repair signal; the sum of the on time of the first repair signals is smaller than or equal to the gate charging time of the display panel.
For example, as shown in fig. 3, the number of driving chips under the display area is 6, and the first multiplexing circuit includes 12 first multiplexers, each including one first input terminal, one first control terminal, and three first output terminals. The first multi-way switch is connected with the driving chip through a corresponding first control end, and the driving chip transmits a control signal to the first multi-way switch so as to enable the corresponding first multi-way switch to be conducted, and then a corresponding first output end of the first multi-way switch outputs a repair signal. The fan-out area of the display panel is provided with a first repair signal line, a first output end corresponding to the first multi-way switch is provided with a first repair signal line, each first output end is electrically connected with each first repair signal line in a one-to-one correspondence mode, the first signal line is connected through a first input end of each first multi-way switch, when the fan-out area of the display panel is broken, the fan-out area is provided with the first multi-way switch circuit and 36 first repair signal lines, a laser Welding mode is adopted, the corresponding first repair signal lines are selected from the 36 first repair signal lines below the display area to replace broken wires, laser Welding conduction is carried out on the selected first repair signal lines, and the corresponding drive chip is controlled to output a control signal, so that the repaired first repair signal lines can output repair signals, and broken wires of the fan-out area of the display panel are repaired.
When the fan-out area of the display panel is short-circuited, the short-circuited wiring is disconnected in a laser disconnection mode based on the arrangement of the first multi-way switch circuits and 36 first repair signal wires in the fan-out area, namely, after the laser cutting bad blocks are utilized. And selecting a corresponding first repair signal line from 36 first repair signal lines below the display area, replacing the short-circuit wiring lines to conduct laser welding, and controlling a corresponding driving chip to output a control signal, so that the repaired first repair signal line can output a repair signal, and further repairing the fan-out wiring short circuit of the fan-out area of the display panel is realized.
In the above embodiment, each of the first multiplexers includes 3 first repair signals, and the signals provided by each of the first multiplexers are driven to be sequentially input into the display area by controlling the Gate charging time of the display panel to be less than or equal to 1H (Gate charging time) after the on time of the 3 first repair signals, and the in-plane display is not affected.
In one example, each second output is configured to output a second repair signal; the sum of the on time of the second repair signals is smaller than or equal to the gate charging time of the display panel.
For example, as shown in fig. 3, the number of driving chips under the display area is 6, and the second multiplexing circuit includes 4 second multiplexing switches, each of which includes one second input terminal, one second control terminal, and three second output terminals. The second multi-way switch is connected with the driving chip through a corresponding second control end, and the driving chip transmits a control signal to the second multi-way switch so as to enable the corresponding second multi-way switch to be conducted, and then a corresponding second output end of the second multi-way switch outputs a repair signal. The first signal wires are also arranged below the driving chip, the second repair signal wires are arranged at the second output ends corresponding to the second multi-way switches, each second output end is electrically connected with each second repair signal wire in a one-to-one correspondence manner, the second signal wires are connected through the second input ends of each second multi-way switch, when the display area of the display panel is broken, the corresponding second repair signal wires are selected from the 12 second repair signal wires above the display area in a laser Welding manner based on the arrangement of the second multi-way switch circuits and the 12 second repair signal wires in the fan-out area, the broken signal wires are replaced by the corresponding second repair signal wires, the selected second repair signal wires are conducted in a laser Welding manner, and the corresponding driving chip is controlled to output control signals, so that the repaired second repair signal wires can output repair signals, and the broken repair of the signal wires of the display area of the display panel is realized.
When the display area of the display panel is short-circuited, the short-circuited signal lines are disconnected in a laser disconnection mode based on the arrangement of the second multi-way switch circuits and the 12 second repair signal lines in the fan-out area, namely, after the bad blocks are disconnected by laser cutting. And selecting a corresponding second repair signal line from 12 second repair signal lines above the display area, replacing the short circuit signal line for laser welding conduction, and controlling a corresponding driving chip to output a control signal, so that the repaired second repair signal line can output a repair signal, and further repairing the short circuit of the signal line of the display area of the display panel is realized.
In the above embodiment, each of the second multiplexers includes 3 paths of second repair signals, and by controlling the on time of the 3 paths of second repair signals to be less than or equal to the Gate charging time of the display panel, that is, less than or equal to 1H (Gate charging time), the signals provided by each group of second multiplexers are driven to be sequentially input to the display area, and the in-plane display is not affected.
In order to solve the problems that in the existing display panel repairing mechanism, the repairing rate of defects such as point defects, line defects and the like in the panel is low, and products are unqualified because the panel is irreparable, the repairing rate of the panel can be improved, the number of repairable wires is increased, and the probability that the products are subjected to unrepairable is reduced. In one embodiment, a display panel is further provided, where the display panel includes a display area, a fan-out area located at a periphery of the display area, and a panel repair circuit according to any one of the above disposed in the fan-out area.
The display panel comprises a display area and a fan-out area, wherein the fan-out area is arranged on the periphery of the display area. The display area is a pixel display area, a pixel unit is arranged in the display area, the pixel unit comprises a display signal line and sub-pixels, and the display signal line can be a power signal line, a data line or a scanning line. The fan-out area is internally provided with a driving circuit and a fan-out wiring, the driving circuit comprises a driving chip for driving a TFT (thin film transistor) source electrode, and the fan-out wiring can be a power signal line, a data line or a scanning line and other signal lines.
Specifically, a first control end of the first multi-way switch is connected with the driving chip, a first input end of the first multi-way switch is connected with the first signal line, and a first output end of each first multi-way switch is connected with each first repair signal line in a one-to-one correspondence manner; the first repair signal lines are used for repairing fan-out wires of the fan-out area of the display panel, so that a plurality of first repair signal lines are provided for the display panel, and further the problem of short circuit or open circuit of the fan-out wires can be effectively repaired; the second control end of the second multi-way switch is connected with the driving chip, the second input end of the second multi-way switch is used for being connected with the second signal wire, and the second output end of each second multi-way switch is connected with each second repairing signal wire in a one-to-one correspondence manner; the second repair signal lines are used for repairing the display signal lines of the display area of the display panel, so that a plurality of second repair signal lines are provided for the display panel, and then the problem of short circuit or open circuit of the signal lines of the display area can be effectively repaired, thereby improving the repair rate of the panel, increasing the number of repairable wires and reducing the probability that products are irreparable.
In one embodiment, a display device is provided, the display device comprising a controller and a display panel as described above; the controller is connected with the display panel.
The specific content process of the panel repair circuit and the display panel may refer to the above, and will not be described herein.
In the above embodiment, the first control end of the first multiplexer is connected to the driving chip, the first input end of the first multiplexer is connected to the first signal line, and the first output end of each first multiplexer is connected to each first repair signal line in a one-to-one correspondence manner; the first repair signal lines are used for repairing fan-out wires of the fan-out area of the display panel, so that a plurality of first repair signal lines are provided for the display panel, and further the problem of short circuit or open circuit of the fan-out wires can be effectively repaired; the second control end of the second multi-way switch is connected with the driving chip, the second input end of the second multi-way switch is used for being connected with the second signal wire, and the second output end of each second multi-way switch is connected with each second repairing signal wire in a one-to-one correspondence manner; the second repair signal lines are used for repairing the display signal lines of the display area of the display panel, so that a plurality of second repair signal lines are provided for the display panel, and then the problem of short circuit or open circuit of the signal lines of the display area can be effectively repaired, thereby improving the repair rate of the panel, increasing the number of repairable wires and reducing the probability that products are irreparable.
In one example, the display panel may be, but is not limited to, various AMOLED display panels, AM Micro LED display panels, AM Mini LED display panels, or LCD display panels.
It will be appreciated by those skilled in the art that the structures shown in fig. 2 and 3 are merely block diagrams of portions of structures related to the present application and do not constitute limitations on the display panel and display device to which the present application is applied, and that a particular display panel and display device may include more or fewer components than shown in the drawings, or may combine certain components, or have different arrangements of components.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A panel repair circuit, comprising:
a plurality of first repair signal lines;
a first multi-way switch circuit including a plurality of first multi-way switches; each first multiplexer comprises a first control end, a first input end and N first output ends; the first control end is used for being connected with the driving chip, the first input end is used for being connected with first signal wires, and each first output end is connected with each first repair signal wire in a one-to-one correspondence manner; the first repair signal line is used for repairing a fan-out wiring of a fan-out area of the display panel;
a plurality of second repair signal lines;
a second multi-way switch circuit including a plurality of second multi-way switches; each second multiplexer comprises a second control end, a second input end and M second output ends; the second control end is used for connecting the driving chip, the second input end is used for connecting second signal lines, and each second output end is connected with each second repair signal line in a one-to-one correspondence manner; the second repair signal line is used for repairing the display signal line of the display area of the display panel.
2. The panel repair circuit of claim 1, wherein the first multi-way switch circuit is disposed in the display panel fan-out area and below the display panel display area.
3. The panel repair circuit of claim 1, wherein the second multi-way switch circuit is disposed above the display panel fan-out area and above the display panel display area.
4. The panel repair circuit of claim 1 wherein the number of second multiplexers is 4; wherein 2 of the second multiplexers are positioned on the left side above the display area of the display panel, and the remaining 2 second multiplexers are positioned on the right side above the display area of the display panel.
5. The panel repair circuit of claim 4 wherein the second multiplexer includes at least 2 of the second outputs.
6. The panel repair circuit of claim 1 wherein the first multiplexer includes at least 2 of the first outputs.
7. The panel repair circuit of claim 1, wherein each of the first output terminals is configured to output a first repair signal; the sum of the on time of each first repair signal is smaller than or equal to the gate charging time of the display panel.
8. The panel repair circuit of claim 1, wherein each of the second output terminals is configured to output a second repair signal; the sum of the on time of the second repair signals is smaller than or equal to the gate charging time of the display panel.
9. A display panel comprising a display area, a fan-out area located at the periphery of the display area, and the panel repair circuit of any one of claims 1 to 8 disposed in the fan-out area.
10. A display device comprising a controller and the display panel of claim 9; the controller is connected with the display panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210521846.4A CN115171615B (en) | 2022-05-13 | 2022-05-13 | Panel repair circuit, display panel and display device |
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| CN202210521846.4A CN115171615B (en) | 2022-05-13 | 2022-05-13 | Panel repair circuit, display panel and display device |
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| CN115171615B true CN115171615B (en) | 2023-06-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI405016B (en) * | 2010-08-25 | 2013-08-11 | Au Optronics Corp | Display panel |
| KR102103609B1 (en) * | 2014-09-23 | 2020-04-23 | 매그나칩 반도체 유한회사 | Liquid crystal display device with Repair function and Repair type Data format structrue |
| CN104460075B (en) * | 2014-12-22 | 2017-12-05 | 南京中电熊猫液晶显示科技有限公司 | Display device and its driving chip and broken wire repair method |
| CN211603773U (en) * | 2020-01-08 | 2020-09-29 | 昆山龙腾光电股份有限公司 | Liquid crystal display |
| CN111710301A (en) * | 2020-07-13 | 2020-09-25 | 京东方科技集团股份有限公司 | Display panel, preparation method and repair method thereof, and display device |
| CN114360438B (en) * | 2020-09-30 | 2022-12-16 | 荣耀终端有限公司 | Display device, driving chip and electronic equipment |
| CN113823216B (en) * | 2020-09-30 | 2022-09-23 | 荣耀终端有限公司 | Display device, driving chip and electronic equipment |
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