CN111933760A - Miniature LED pixel repairing equipment and miniature LED pixel repairing method - Google Patents
Miniature LED pixel repairing equipment and miniature LED pixel repairing method Download PDFInfo
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Abstract
The invention discloses a micro LED pixel repairing device and a micro LED pixel repairing method. The apparatus comprises: the device comprises a control unit, a processing platform and a repairing unit; the control unit is used for acquiring pixel defect information of the LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel; the processing platform is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space; a repair unit for repairing the defective pixel based on the control information of the control unit; the number of the defective pixels repaired by the repairing units at the same time is at least two. The scheme provided by the invention can realize the simultaneous automatic repair of a plurality of defective pixels, thereby saving the maintenance time and cost.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a micro LED pixel repairing device and a micro LED pixel repairing method.
Background
In the field of Micro-Light Emitting Diode (Micro LED) or Mini-LED display technologies, particularly after a mass transfer process is completed, a pixel (i.e., a Light Emitting Diode (LED)) often fails and needs to be maintained.
However, the existing maintenance methods are all used for repairing a single defective pixel, the mass production of maintenance equipment is not high, a large amount of maintenance time and cost are needed, the efficiency is low, and the maintenance difficulty is extremely high due to the influence of the process.
Disclosure of Invention
The invention provides a micro LED pixel repairing method and a micro LED pixel repairing device, which can realize the simultaneous automatic repairing of a plurality of defective pixels, save the maintenance time and cost, reduce the maintenance difficulty and improve the product yield.
In a first aspect, an embodiment of the present invention provides a micro LED pixel repair device, including: the device comprises a control unit, a processing platform and a repairing unit; wherein the content of the first and second substances,
the control unit is used for acquiring pixel defect information of the LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel;
the processing platform is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space;
a repair unit for repairing the defective pixel based on the control information of the control unit;
the number of the defective pixels repaired by the repairing units at the same time is at least two.
Optionally, the pixel defect information further includes: and the defect type corresponding to the defective pixel on the LED display panel to be repaired.
Optionally, the repair unit includes a laser unit and a pick-and-place unit; wherein the content of the first and second substances,
the laser unit is used for cutting the defective pixel and welding the replacement pixel;
the pick-and-place unit is used for removing the defective pixels cut off by the laser unit and grabbing the replacement pixels to be placed at corresponding positions.
Optionally, the laser unit includes a laser transmitter and an emergent light path unit; wherein the content of the first and second substances,
the laser emitter emits laser;
the emergent light path unit is provided with at least two groups of gap units with adjustable sizes, so that laser emitted by the laser emitter forms at least two emergent laser beams after passing through the emergent light path unit.
Optionally, the size of the emergent light path unit is not less than the preset length.
Optionally, the preset length is a distance between two points farthest away from each other on a line segment where a plane perpendicular to the repair advancing direction intersects with a plane where the LED display panel to be repaired is located.
Optionally, the laser emitted by the laser emitter is a stripe laser.
Optionally, the adjustable precision of the slit unit is not greater than 1 um.
Optionally, the method further includes: a transmission mechanism;
the transmission mechanism is in butt joint with the processing platform and used for transmitting the LED display panel to be repaired to the processing platform.
Optionally, the transmission mechanism comprises: an IN/OUT interface and a transfer mechanism; wherein the content of the first and second substances,
the IN/OUT interface is located between the upstream equipment and the processing platform, and the transfer mechanism is used for moving the LED display panel to be repaired from the processing platform to the IN/OUT interface or moving the LED display panel to be repaired from the IN/OUT interface to the processing platform.
Optionally, the moving the processing platform in space includes: the processing platform moves along an X axis and a Y axis in a first plane, and the X axis and the Y axis are mutually vertical; and/or the processing platform rotates in the first plane.
Alternatively, when the laser beams include at least a first set of laser beams and a second set of laser beams,
the first set of laser beams and the second set of laser beams are parallel to each other; alternatively, the first and second electrodes may be,
the first set of laser beams and the second set of laser beams have an angle therebetween.
Optionally, the pick-and-place unit includes a plurality of groups of vacuum suction nozzles and a plurality of groups of precision grippers.
Optionally, the laser unit further includes: a cooling unit; the cooling unit is arranged on one side of the laser emitter and used for cooling the laser emitter.
Optionally, the method further includes: and the visual unit is used for confirming whether the pixel repair is qualified or not after the repair unit finishes repairing the defective pixel.
Optionally, the control unit is further configured to analyze the historical repair data to generate an analysis result, where the analysis result at least includes the defect high-incidence coordinate.
In a second aspect, an embodiment of the present invention further provides a method for repairing a micro LED pixel, where the method for repairing a micro LED pixel includes:
acquiring pixel defect information of an LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel;
and repairing the defective pixels by the repairing unit according to the pixel defect information, wherein the number of the defective pixels repaired by the repairing unit at the same time is at least two.
Optionally, the pixel defect information further includes: and the defect type corresponding to the defective pixel on the LED display panel to be repaired.
Optionally, the step of repairing the defective pixel by the repairing unit includes at least one of the following methods:
cutting the defective pixel by using laser;
removing the defective pixel by using a vacuum suction nozzle;
grabbing the replacement pixel by a precise gripper and placing the replacement pixel at a corresponding position;
the pixels are replaced with laser welding.
Optionally, the method further includes:
and analyzing the historical repair data to generate an analysis result, wherein the analysis result at least comprises a defect high-transmission coordinate.
Optionally, after the repairing unit repairs the defective pixel, the method further includes:
and checking and confirming the maintenance effect through a visual unit.
Optionally, the checking and confirming the maintenance effect through the visual unit includes:
whether the repaired defective pixel can work normally is confirmed by shooting through a visual unit;
and if the repaired defective pixel can not work normally, returning to execute the step of repairing the defective pixel by the repairing unit according to the pixel defect information, and repairing the repaired defective pixel again until the repaired defective pixel can work normally.
Optionally, before the repairing unit repairs the defective pixel, the method further includes:
a repair batch is assigned to each defective pixel.
Optionally, the defect types corresponding to the defective pixels in the same repair batch are the same.
The embodiment of the invention provides a micro LED pixel repairing method and a micro LED pixel repairing device, wherein the micro LED pixel repairing device comprises: the device comprises a control unit, a processing platform and a repairing unit; the control unit is used for acquiring pixel defect information of the LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel; the processing platform is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space; a repair unit for repairing the defective pixel based on the control information of the control unit; the number of the defective pixels repaired by the repairing units at the same time is at least two. The micro LED pixel repairing equipment realizes full-automatic repairing of the defective pixel without any manual operation; the repair unit can repair a plurality of defective pixels in one-time repair process, and compared with the existing method for repairing a single defective pixel, the repair unit greatly saves the maintenance time and cost; meanwhile, the maintenance difficulty can be reduced by replacing pixels through laser welding, and the product yield is improved.
Drawings
Fig. 1 is a schematic top view of a micro LED pixel repair device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a laser transmitter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of a vacuum nozzle in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the operation of a precision gripper according to an embodiment of the present invention;
fig. 5 is a schematic flowchart of a method for repairing a micro LED pixel according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of another method for repairing a micro LED pixel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the size of some of the structures, regions, etc. may be exaggerated in the drawings for understanding and ease of description. Additionally, unless explicitly described to the contrary, the word "comprise", and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
The following describes the micro LED pixel repair device, the micro LED pixel repair method, and the technical effects thereof in detail.
Fig. 1 shows a schematic top-view structure diagram of a micro LED pixel repair device according to an embodiment of the present invention. The Micro LED pixel repairing equipment is suitable for repairing a Micro LED display panel or a Mini LED display panel, and comprises a transmission mechanism 1, a processing platform 2, a vision unit 3, a repairing unit 4 and a control unit 5. As shown in fig. 1, the transmission mechanism 1, the processing platform 2, the vision unit 3, the repair unit 4 and the control unit 5 are all located on the operation table, but are not necessarily located on the same plane in space; in some embodiments, the control unit 5 may be provided within the console to save space.
The transmission mechanism 1 is interfaced with an upstream device (not shown in fig. 1) and the processing platform 2, and is used for transmitting an LED display panel (not shown in fig. 1) to be repaired between the upstream device and the processing platform 2.
The processing platform 2 is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space. Specifically, the processing platform 2 can drive the LED display panel to be repaired to move in the first plane. The first plane is spatially located below the repair unit 4 and the vision unit 3.
The control unit 5 is electrically connected with the transmission mechanism 1, the processing platform 2, the vision unit 3 and the repair unit 4, and is used for reading pixel Defect information (such as Defect File System (DFS) information) of the LED display panel to be repaired and determining a Defect type corresponding to each defective pixel on the LED display panel to be repaired; the processing platform 2 drives the LED display panel to be repaired to move to the position below the visual unit 3, and controls the visual unit 3 to determine coordinate information corresponding to each defective pixel; and enabling the processing platform 2 to drive the LED display panel to be repaired to move to the position below the repair unit 4, and controlling the repair unit 4 to repair the defective pixels according to the defect type and the coordinate information corresponding to each defective pixel.
The number of defective pixels repaired by the repair unit 4 is at least two.
The defect types may be bright spots (e.g., pixel damage), dark spots (e.g., contact failure), etc. The repairing modes corresponding to different defect types may be the same or different. For example, for a defective pixel with a damaged pixel, the repair unit 4 may replace the defective pixel with a good replacement pixel; and for defective pixels with poor contact, the repair unit 4 can perform re-welding on the poor contact.
With continued reference to fig. 1, the transmission 1 comprises: an IN/OUT interface 11 and a transfer mechanism 12; the IN/OUT interface 11 is located between the upstream equipment and the processing platform 2, and the transfer mechanism 12 is used for moving the LED display panel to be repaired from the processing platform 2 to the IN/OUT interface 11, or for moving the LED display panel to be repaired from the IN/OUT interface 11 to the processing platform 2.
The transfer mechanism 12 may be a robot or a conveyor. When the transferring mechanism 12 is a manipulator, the manipulator can grab and move the LED display panel to be repaired; when the transfer mechanism 12 is a conveyor belt, the conveyor belt is arranged between the IN/OUT interface 11 and the processing platform 2, two ends of the conveyor belt are respectively butted with the IN/OUT interface 11 and the processing platform 2, and the conveyor belt can reciprocate between the IN/OUT interface 11 and the processing platform 2 to drive the LED display panel to be repaired.
IN general, IN order to facilitate the movement of the LED display panel to be repaired, the IN/OUT interface 11 and the processing platform 2 may be located IN the same plane (i.e., a first plane).
The movement of the working platform 2 in space comprises: the processing platform 2 moves along an X axis and a Y axis in a first plane, and the X axis and the Y axis are mutually vertical; and/or the processing platform 2 rotates in a first plane.
The vision unit 3 may be a Charge-coupled Device (CCD) camera. The CCD is a semiconductor device that can convert optical images into digital signals and has a series of advantages such as self-scanning, wide sensing spectrum, small distortion, small size, light weight, low system noise, low power consumption, long life, high reliability, etc. According to the invention, the CCD camera is adopted as the visual unit 3, so that accurate alignment of each defective pixel on the LED display panel to be repaired can be realized, and the repairing effect is ensured.
With continued reference to fig. 1, the repair unit 4 includes a laser unit 41 and a pick-and-place unit 42; wherein the laser unit 41 is used to cut the defective pixel and weld the replacement pixel; the pick-and-place unit 42 is used for removing the defective pixels cut off by the laser unit and grabbing replacement pixels to be placed at corresponding positions.
The laser unit 41 includes an exit optical path unit 411, a laser emitter 412, and a cooling unit 413, the exit optical path unit 411 is electrically connected to the laser emitter 412, and the cooling unit 413 is disposed at one side of the laser emitter 412.
Laser emitter 412 emits laser light; the emergent light path unit 411 is provided with at least two groups of gap units with adjustable sizes, so that laser emitted by the laser emitter 412 forms at least two emergent laser beams after passing through the emergent light path unit 411. The cooling unit 413 is used for cooling the laser emitter 412, and specifically, the cooling unit 413 may be a water chiller.
Fig. 2 is a schematic diagram illustrating an operation of a laser transmitter according to an embodiment of the present invention. The micro LED pixel repairing equipment can select the laser emitter with corresponding power according to the product characteristics. Different from a single-gap laser transmitter in the prior art, the laser transmitter provided by the embodiment of the invention adopts a multi-gap scheme. As shown in fig. 2, when the laser emitter is in operation, two slits on two sides of each sub-pixel are opened, the laser beam can pass through the opened slits, and the laser beam cannot pass through the closed slits, that is, the laser beam passing through two sides of each sub-pixel is called a group of laser beams (including two outgoing laser beams). The number of the defective pixels of the laser emitter maintained at one time can be determined by the size of the laser beam emitted by the laser emitter and the number of the gap controllers, so that multi-point maintenance is realized.
In an embodiment, the size of the exit light path unit 411 is not less than a preset length, where the preset length is a distance between two points that are farthest away on a line segment intersecting a plane perpendicular to the repair proceeding direction and a plane where the LED display panel to be repaired is located.
For example, the value of the preset length may refer to any one of the following rules:
and 3, when the LED display panel to be repaired is circular, presetting the length as the diameter of the LED display panel to be repaired.
Illustratively, assuming that the width of the pixel particles is 100um and the pitch is 50um, the LED display panel to be repaired is circular and has a diameter of 200mm, so that 1300 defective pixel particles can be repaired at one time by using a laser emitter with an exit light path unit having a size of 200 mm.
In practical applications, the size of the laser beam emitted by the laser emitter can be adjusted according to the product structure (e.g., wafer size, product size, etc.).
In one embodiment, the laser emitted by the laser emitter 412 is a stripe laser.
In an embodiment, the adjustable accuracy of the slit unit (i.e. the slit accuracy of the laser emitter) is not more than 1 um. Therefore, the point positions can be accurately controlled, the function of not damaging peripheral normal pixel particles is achieved, and the maintenance effect is ensured.
In addition, it should be noted that, when the laser beams include at least a first group of laser beams and a second group of laser beams, the first group of laser beams and the second group of laser beams are parallel to each other; alternatively, the first set of laser beams and the second set of laser beams have an angle therebetween. Preferably, the angle between the first set of laser beams and the second set of laser beams is 90 degrees. That is, the first and second groups of laser beams may repair two rows/two columns of defective pixels at the same time, or the first and second groups of laser beams may repair one row and one column of pixels at the same time.
The pick-and-place unit 42 includes a plurality of sets of vacuum nozzles and a plurality of sets of precision grippers. FIG. 3 illustrates a functional diagram of a vacuum nozzle in accordance with an embodiment of the present invention; fig. 4 is a schematic diagram illustrating the operation of a precision gripper according to an embodiment of the present invention.
After the laser unit 41 cuts the defective pixels, the cut defective pixels are adsorbed by the vacuum suction nozzle, and replacement pixels are placed by a precision gripper as required. Wherein, the size of vacuum nozzle slightly is greater than the cross-section of pixel to guarantee that the pixel does not drop in the adsorption process.
The precision gripper can perform linear movement (such as movement along an X axis and a Y axis) to grip the replacement pixels to the place needing replacement, so that a synchronous replacement function of a plurality of replacement pixels is realized.
The working principle of the miniature LED pixel repair equipment provided by the invention is as follows: the upstream device transmits the LED display panel to be repaired to the IN/OUT interface 11, and the control unit 5 controls the transfer mechanism 12 to move the LED display panel to be repaired from the IN/OUT interface 11 to the processing platform 2. The control unit 5 reads DFS information of the LED display panel to be repaired, and determines the defect type corresponding to each defective pixel on the LED display panel to be repaired; the processing platform 2 drives the LED display panel to be repaired to move below the visual unit 3, and the visual unit 3 is controlled to determine coordinates corresponding to each defective pixel (assuming that the LED display panel to be repaired has three defective pixels, which are respectively marked as a defective pixel 1, a defective pixel 2 and a defective pixel 3, the defect types of the defective pixel 1 and the defective pixel 2 are bright points, and the defect type of the defective pixel 3 is a dark point); aiming at the defective pixel 1 and the defective pixel 2, the control unit 5 enables the processing platform 2 to drive the LED display panel to be repaired to move to the position below the repair unit 4, controls the repair unit 4 to replace the defective pixel 1 and the defective pixel 2, and enables the processing platform 2 to drive the LED display panel to be repaired to move to the position below the repair unit 4 and controls the repair unit 4 to re-weld the defective pixel 3 aiming at the defective pixel 3; after the three defective pixels are all repaired, the control unit 5 controls the processing platform 2 to return to the initial position, and controls the transfer mechanism 12 to move the repaired display panel from the processing platform 2 to the IN/OUT interface 11, so that the IN/OUT interface 11 returns the repaired display panel to the upstream device.
Optionally, before the control unit 5 controls the processing platform 2 to return to the initial position, the control unit 5 may control the processing platform 2 to drive the LED display panel to be repaired to move to the lower side of the visual unit 3, and control the visual unit 3 to confirm the maintenance effect (i.e., confirm whether pixel repair is qualified), so as to ensure that each defective pixel is correspondingly processed.
Compared with the existing method for repairing a single defective pixel, the miniature LED pixel repairing equipment provided by the invention is a full-automatic maintenance platform, and does not need to be operated by personnel; the repair unit can repair a plurality of defective pixels in one repair process, so that the maintenance time and cost are greatly saved; in addition, compared with the existing method for curing the replacement pixels by using a solder paste welding mode, the method for replacing the pixels by using laser welding can realize accurate control on the positions, reduce the maintenance difficulty and improve the product yield.
In addition, it is also necessary to supplement that the control unit 5 may run software, and the software may analyze the historical repair data in the period at intervals to generate an analysis result, where the analysis result at least includes the defect high-incidence coordinates. The analysis result can embody the defect high-incidence position and provide a process improvement basis for the upstream design/manufacturing link.
The embodiment of the invention provides a miniature LED pixel repairing device which comprises a control unit, a processing platform and a repairing unit, wherein the control unit is used for controlling the processing platform to move; the control unit is used for acquiring pixel defect information of the LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel; the processing platform is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space; a repair unit for repairing the defective pixel based on the control information of the control unit; the number of the defective pixels repaired by the repairing units at the same time is at least two. The micro LED pixel repairing equipment realizes full-automatic repairing of the defective pixel without any manual operation; the repair unit can repair a plurality of defective pixels in one-time repair process, and compared with the existing method for repairing a single defective pixel, the repair unit greatly saves the maintenance time and cost; meanwhile, the maintenance difficulty can be reduced by replacing pixels through laser welding, and the product yield is improved.
Fig. 5 is a schematic flow chart illustrating a method for repairing a micro LED pixel according to an embodiment of the present invention, where the method is applied to the micro LED pixel repairing apparatus described in the foregoing embodiment. The method comprises the following steps:
s101, obtaining pixel defect information of the LED display panel to be repaired.
The pixel defect information at least comprises coordinate information corresponding to the defective pixel.
In one embodiment, the pixel defect information further includes: and the defect type corresponding to the defective pixel on the LED display panel to be repaired.
The defect types may be bright spots (e.g., pixel damage), dark spots (e.g., contact failure), etc. The repairing modes corresponding to different defect types may be the same or different. For example, for a defective pixel with a defective pixel, the defective pixel may be replaced with a good replacement pixel; and for the defective pixel with poor contact, the defective pixel with poor contact can be subjected to re-welding.
The coordinates corresponding to each defective pixel on the LED display panel to be repaired can be obtained through the CCD camera. The CCD is a semiconductor device that can convert optical images into digital signals and has a series of advantages such as self-scanning, wide sensing spectrum, small distortion, small size, light weight, low system noise, low power consumption, long life, high reliability, etc. By adopting the CCD camera, accurate alignment of each defective pixel on the LED display panel to be repaired can be realized, and the repairing effect is ensured.
And S102, repairing the defective pixels by the repairing unit according to the pixel defect information, wherein the number of the defective pixels repaired by the repairing unit at the same time is at least two.
Specifically, before the repair unit repairs the defective pixels, a repair batch may be allocated to each defective pixel according to the defect type corresponding to each defective pixel. For example, if the number of the defective pixels is too large to complete the repair at one time, the defective pixels may be repaired in batches. Preferably, the defect types corresponding to the defective pixels in the same repair batch are the same, so that the repair process for each defective pixel is the same in one repair process, and the control difficulty can be reduced.
Specifically, the method for repairing the defective pixel by the repairing unit in step S102 may include at least one of the following four operations:
A. the defective pixels are cut with a laser.
B. The defective pixel is removed using a vacuum nozzle.
C. The replacement pixel is placed at the corresponding position by grasping with a precision gripper.
D. The pixels are replaced with laser welding.
The different types of defective pixels may be repaired in the same or different ways. Illustratively, for a defective pixel with a damaged pixel, the defective pixel needs to be replaced by a good replacement pixel, i.e., the steps of a-B-C-D are all performed; and for the defective pixel with poor contact, the defective pixel with poor contact can be re-welded, namely only the step D is needed.
After the defective pixels are repaired, the maintenance effect can be checked and confirmed through a visual unit (such as a CCD camera), and each defective pixel is guaranteed to be correspondingly processed.
Specifically, the method for confirming the maintenance effect through the visual unit detection may include: whether the repaired defective pixel can work normally is confirmed by shooting through a visual unit; and if the repaired defective pixel can not work normally, returning to execute the step S102, and repairing the repaired defective pixel again until the repaired defective pixel can work normally.
On the basis of the foregoing embodiment, with reference to fig. 5, fig. 6 shows a schematic flow chart of another method for repairing a micro LED pixel according to an embodiment of the present invention, and after step S102 is completed, the method further includes the following steps:
s103, analyzing the historical repair data to generate an analysis result, wherein the analysis result at least comprises a defect high-incidence coordinate.
The analysis result can embody the defect high-incidence position and provide a process improvement basis for the upstream design/manufacturing link.
In addition, the step S103 may be executed once every a period of time, and the data used each time is the historical repair data in the period, so as to ensure the practicability and accuracy of the analysis result.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (22)
1. A micro LED pixel repair device, comprising: the device comprises a control unit, a processing platform and a repairing unit; wherein the content of the first and second substances,
the control unit is used for acquiring pixel defect information of the LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel;
the processing platform is used for bearing the LED display panel to be repaired and driving the LED display panel to be repaired to move in space;
the repair unit is used for repairing the defective pixel based on the control information of the control unit;
the number of the defective pixels repaired by the repairing units at the same time is at least two;
the repair unit comprises a laser unit and a pick-and-place unit; wherein the content of the first and second substances,
the laser unit is used for cutting the defective pixel and welding the replacement pixel;
the picking and placing unit is used for removing the defective pixels cut off by the laser unit and grabbing the replacement pixels to be placed at corresponding positions.
2. The micro LED pixel repair device of claim 1, wherein the pixel defect information further comprises: and the LED display panel to be repaired is provided with a defect type corresponding to the defective pixel.
3. The micro LED pixel repair device of claim 1, wherein the laser unit comprises a laser emitter and an exit light path unit; wherein the content of the first and second substances,
the laser transmitter emits laser;
the emergent light path unit is provided with at least two groups of gap units with adjustable sizes, so that laser emitted by the laser emitter passes through the emergent light path unit to form at least two emergent laser beams.
4. The micro LED pixel repair device according to claim 3, wherein the size of the exit light path unit is not less than a preset length.
5. The micro LED pixel repair device of claim 4,
the preset length is the distance between two points farthest away on a line segment of a plane perpendicular to the repair advancing direction and a plane where the LED display panel to be repaired is located.
6. The micro LED pixel repair device of claim 3, wherein the laser emitted by the laser emitter is a stripe laser.
7. The micro LED pixel repair device of claim 3, wherein the adjustable precision of the slit unit is no greater than 1 um.
8. The micro LED pixel repair device of claim 1, further comprising: a transmission mechanism;
the transmission mechanism is in butt joint with the processing platform and used for transmitting the LED display panel to be repaired to the processing platform.
9. The micro LED pixel repair device of claim 8, wherein the actuator mechanism comprises: an IN/OUT interface and a transfer mechanism; wherein the content of the first and second substances,
the IN/OUT interface is located between upstream equipment and the processing platform, and the transfer mechanism is used for moving the to-be-repaired LED display panel from the processing platform to the IN/OUT interface or moving the to-be-repaired LED display panel from the IN/OUT interface to the processing platform.
10. The micro LED pixel repair device of claim 1, wherein the movement of the processing platform in space comprises: the processing platform moves along an X axis and a Y axis in a first plane, and the X axis and the Y axis are mutually vertical; and/or the processing platform rotates in a first plane.
11. The micro LED pixel repair device of claim 3, wherein when the laser beams include at least a first set of laser beams and a second set of laser beams,
the first set of laser beams and the second set of laser beams are parallel to each other; alternatively, the first and second electrodes may be,
the first set of laser beams and the second set of laser beams have an included angle therebetween.
12. The micro LED pixel repair device of claim 1, wherein the pick-and-place unit comprises a plurality of sets of vacuum suction nozzles and a plurality of sets of precision grippers.
13. The micro LED pixel repair device of claim 3, wherein the laser unit further comprises: a cooling unit; the cooling unit is arranged on one side of the laser transmitter and used for cooling the laser transmitter.
14. The micro LED pixel repair device of claim 1, further comprising: and the visual unit is used for confirming whether the pixel repair is qualified or not after the repair unit finishes repairing the defective pixel.
15. The device for repairing a micro LED pixel according to claim 1, wherein the control unit is further configured to analyze historical repair data to generate an analysis result, and the analysis result at least includes a defect high emission coordinate.
16. A method for repairing a micro LED pixel is characterized by comprising the following steps:
acquiring pixel defect information of an LED display panel to be repaired, wherein the pixel defect information at least comprises coordinate information corresponding to a defective pixel;
repairing the defective pixels by a repairing unit according to the pixel defect information, wherein the number of the defective pixels repaired by the repairing unit at the same time is at least two;
the step of repairing the defective pixel by the repair unit includes at least one of the following methods:
cutting the defective pixel by using laser;
removing the defective pixel by using a vacuum suction nozzle;
grabbing the replacement pixel by a precise gripper and placing the replacement pixel at a corresponding position;
the pixels are replaced with laser welding.
17. The method of claim 16, wherein the pixel defect information further comprises: and the LED display panel to be repaired is provided with a defect type corresponding to the defective pixel.
18. The method of claim 16, further comprising:
and analyzing the historical repair data to generate an analysis result, wherein the analysis result at least comprises a defect high-emission coordinate.
19. The method of claim 16, further comprising, after the repairing unit repairs the defective pixel:
and checking and confirming the maintenance effect through a visual unit.
20. The method of claim 19, wherein the confirming the repair effect by a visual unit inspection comprises:
whether the repaired defective pixel can work normally is confirmed by shooting through a visual unit;
and if the repaired defective pixel can not work normally, returning to execute the step of repairing the defective pixel by the repairing unit according to the pixel defect information, and repairing the repaired defective pixel again until the repaired defective pixel can work normally.
21. The method of claim 17, further comprising, before the repairing unit repairs the defective pixel:
a repair batch is assigned to each defective pixel.
22. The method of claim 21, wherein the defect types of the defective pixels in the same repair batch are the same.
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