CN114379091B - Printing equipment and method for LED retaining wall of display panel - Google Patents

Printing equipment and method for LED retaining wall of display panel Download PDF

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Publication number
CN114379091B
CN114379091B CN202210292190.3A CN202210292190A CN114379091B CN 114379091 B CN114379091 B CN 114379091B CN 202210292190 A CN202210292190 A CN 202210292190A CN 114379091 B CN114379091 B CN 114379091B
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Prior art keywords
target
printing
retaining wall
station
module
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CN114379091A (en
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孙文灏
茹李波
徐恩毅
吉祥
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Corevoxel Hangzhou Technology Development Co ltd
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Corevoxel Hangzhou Technology Development Co ltd
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Priority to CN202210292190.3A priority Critical patent/CN114379091B/en
Publication of CN114379091A publication Critical patent/CN114379091A/en
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Publication of CN114379091B publication Critical patent/CN114379091B/en
Priority to PCT/CN2022/128177 priority patent/WO2023165147A1/en
Priority to KR1020247016336A priority patent/KR20240093728A/en
Priority to EP22912784.0A priority patent/EP4261015A4/en
Priority to TW113105855A priority patent/TW202421414A/en
Priority to TW111146371A priority patent/TWI838997B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/35—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The invention provides a printing device and a method for an LED retaining wall of a display panel, wherein the device comprises: the motion control system is used for controlling the target LED retaining wall printed on the upper surface of the target substrate on the target station; an adsorption device including a suction cup for adsorbing the lower surface of the target substrate by a vacuum pump; a measurement system including a sensor for measuring flatness data of a target substrate and a sensor controller; the Z-axis controller is used for controlling the printing receiving distance between the target multi-needle module and the upper surface of the target substrate; the target multi-needle module comprises a printing needle head and a fluid control system, wherein the fluid control system is used for providing preset air pressure parameters for the printing needle head; and the target station is used for accommodating the target substrate so that the target multi-needle module performs stacked printing on the target LED retaining wall on the upper surface of the target substrate. The printing equipment and the method for the LED retaining wall of the display panel provided by the invention can improve the manufacturing efficiency and precision of the LED retaining wall.

Description

Printing equipment and method for LED retaining wall of display panel
Technical Field
The invention relates to the technical field of display panel processing, in particular to printing equipment and a method for an LED retaining wall of a display panel.
Background
The submillimeter Light Emitting Diode (Mini-LED) and the Micro Light Emitting Diode (Micro-LED) have the display advantages of high luminous efficiency, high contrast and the like, and have the characteristics of long service life and stable performance. Meanwhile, the relatively simple manufacturing process and technical outline make it a mainstream Display technology to replace Liquid Crystal Display (LCD) and Organic Light-Emitting Diode (OLED) in the future.
At present, the technology of manufacturing a blue light diode by using gallium nitride is mature, and a red light diode has high manufacturing cost and poor effect, so that the blue light diode emits red light or green light by adopting a mode of point-converting color particles (red fluorescent powder or green fluorescent powder) on the blue light diode at the present stage. In order to avoid color mixing of color conversion particles with different colors in adjacent sub-pixels, a retaining wall needs to be built around each group of LEDs to prevent color crosstalk caused by contact of different color conversion particles during injection, so that the color purity is improved.
Although inorganic LEDs show a tendency to shrink. However, the size of the retaining wall is still in the order of tens of microns, for a Mini-LED product, the height of an LED is about 110 microns, the required height of the retaining wall is more than 120 microns, the retaining wall is manufactured by using the traditional photoetching process and needing steps of gluing, exposing, developing and the like, the retaining wall is manufactured by calculating according to 1 micron/min, the retaining wall for manufacturing a single panel needs more than 100min, the efficiency is extremely low, and the consistency of width and height cannot be guaranteed. For Micro-LED products, gaps among LEDs are smaller, and the traditional photoetching process is applied to Micro-LED retaining wall manufacturing and faces more challenges.
Disclosure of Invention
The invention provides a printing device and method for an LED retaining wall of a display panel, which are used for overcoming the defect that a high-precision retaining wall cannot be manufactured in a narrow LED gap in the prior art and realizing the manufacturing efficiency and precision of the LED retaining wall.
The invention provides a printing device of an LED retaining wall of a display panel, which comprises:
the motion control system is connected with the control terminal and used for controlling the target LED retaining wall printed on the upper surface of the target substrate on the target station;
the adsorption device is connected with the motion control system and comprises a vacuum pump, a vacuum pump and a vacuum pump, wherein the vacuum pump is used for adsorbing the lower surface of the target substrate on a sucker;
the measuring system is connected with the control terminal and comprises a sensor and a sensor controller, wherein the sensor is used for measuring the flatness data of the target substrate;
the Z-axis controller is connected with the control terminal and is used for controlling the printing receiving distance between the target multi-needle module and the upper surface of the target substrate;
the target multi-needle module is connected with the Z-axis controller and comprises a printing needle head and a fluid control system, and the fluid control system is used for providing preset air pressure parameters for the printing needle head;
the target station is connected with the motion control system and used for accommodating the target substrate so that the target multi-needle module can perform target LED retaining wall laminated printing on the upper surface of the target substrate;
the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the first module is matched with the first station, the second module is matched with the second station, and the target substrate comprises a PCB substrate or a glass substrate.
According to the printing equipment for the LED retaining wall of the display panel provided by the invention, the target station further comprises:
the cleaning area is used for cleaning and storing the printing needle head;
and the preprinting area is used for preprinting under preset air pressure parameters until the printing needle head stably discharges materials, and the adsorption device is controlled by the motion control system to leave the preprinting area.
According to the printing equipment for the LED retaining wall of the display panel, provided by the invention, the motion control system is specifically used for controlling the adsorption device to move in an XY plane under the condition that the target station comprises a first station and a second station, so that the first module prints the longitudinal LED retaining wall on the target substrate in the first station;
and sending a first motion instruction to the adsorption device, so that the adsorption device transfers the target substrate to the XY plane of the second station to move according to the first motion instruction, and the second module prints the transverse LED retaining wall on the target substrate in the second station.
According to the printing equipment for the LED retaining wall of the display panel, provided by the invention, the motion control system is specifically used for controlling the adsorption device to move in an XY plane under the condition that the target station comprises a first station or a second station, so that the target multi-needle module prints the longitudinal LED retaining wall on the target substrate in the target station;
and sending a second motion instruction to the target station, so that after the target station rotates by 90 degrees according to the second motion instruction, the adsorption device is driven to move in an XY plane, and the target multi-needle module prints the transverse LED retaining wall on the target substrate in the target station.
According to the printing equipment for the LED retaining wall of the display panel, the Z-axis controller comprises one or more than one.
The invention also provides a printing method of the LED retaining wall of the display panel, which comprises the following steps:
taking a printing task as a guide, performing preparation operation before printing, and scanning the target substrate through a measuring system of a printing device of an LED retaining wall of a display panel to obtain flatness data of the target substrate;
the motion control system moves the target multi-needle module to a printing starting point of a target substrate, and based on the received flatness data, a Z-axis controller is used for adjusting the printing receiving distance of the target multi-needle module;
based on preset air pressure parameters and target line widths, the target multi-pin module is subjected to laminating printing on the upper surface of the target substrate on a target station, and a target LED retaining wall is generated by solidification under the condition that the printing height meets a target height range;
the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the printing height is the accumulated layer height corresponding to the number of printing layers, and the printing task at least comprises the basis that the target substrate determines the target line width and the target height.
According to the printing method for the LED retaining wall of the display panel, provided by the invention, the printing receiving distance of the target multi-needle module is adjusted by using the Z-axis controller based on the received flatness data, and the method comprises the following steps:
acquiring a vertical distance between each printing point of the target substrate and the target multi-needle module based on the flatness data and the target corresponding relation, and taking the vertical distance as an actual value of a printing receiving distance;
under the condition that the target multi-needle module is positioned at the printing point, adjusting the actual value of the printing receiving distance to be the target value of the printing receiving distance through the Z-axis controller;
wherein, the target value of the printing receiving distance corresponding to each printing point is the same.
According to the printing method of the LED retaining wall of the display panel, provided by the invention, the preparation operation before printing comprises the following steps:
after the printing material is filled into the needle cylinder, mounting the printing needle head on the needle cylinder, and connecting the needle cylinder and the fluid control system through the printing needle head;
controlling the motion control system through a control terminal to perform mechanical zeroing operation;
the printing material is matched with the width-height ratio formed by the printing material, the inner diameter parameter of the printing needle head is matched with the target line width, and the number of printing layers is set based on the width-height ratio of the target LED retaining wall, the target line width and the target height.
According to the printing method of the LED retaining wall of the display panel, provided by the invention, before the motion control system moves the target multi-needle module to the printing starting point of the target substrate, pre-printing is carried out under a preset air pressure parameter until the printing needle head stably discharges materials, and then the motion control system controls the adsorption device to leave the pre-printing area.
According to the printing method for the LED retaining wall of the display panel, provided by the invention, the target multi-pin module is subjected to laminating printing on the upper surface of the target substrate on the target station based on the preset air pressure parameter and the target line width, and the target LED retaining wall is generated by curing under the condition that the printing height meets the target height range, and the printing method comprises the following steps:
based on the preset air pressure parameter and the target line width, the first module carries out laminating printing on the upper surface of the target substrate on the first station, and a longitudinal LED retaining wall is generated under the condition that the printing height meets the target height;
based on the preset air pressure parameter and the target line width, the second module is used for performing stacked printing on the upper surface of the target substrate on the second station, and a transverse LED retaining wall is generated under the condition that the printing height meets the target height.
According to the printing method for the LED retaining wall of the display panel, provided by the invention, the target multi-pin module is subjected to laminating printing on the upper surface of the target substrate on the target station based on the preset air pressure parameter and the target line width, and the target LED retaining wall is generated by curing under the condition that the printing height meets the target height range, and the printing method comprises the following steps:
based on the preset air pressure parameter and the target line width, the target multi-pin module performs stacked printing on the upper surface of the target substrate on the first station or the second station, and generates a longitudinal LED retaining wall when the printing height meets the target height;
and rotating the first station or the second station by 90 degrees, performing stacked printing on the upper surface of the target substrate by the target multi-needle module, and generating a transverse LED retaining wall under the condition that the printing height meets the target height.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein when the processor executes the program, the printing method of the LED retaining wall of the display panel is realized.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of printing an LED retaining wall of a display panel as described in any of the above.
The invention also provides a computer program product comprising a computer program, wherein the computer program is executed by a processor to realize the printing method of the LED retaining wall of the display panel.
According to the printing equipment and method for the LED retaining wall of the display panel, the target multi-needle module is controlled to be in the target station based on the Z-axis controller, the motion process of the target substrate in the XY plane is controlled through the motion control system, the target multi-needle module is made to adjust the printing receiving distance in each printing point, and then the target LED retaining wall with the consistent width and high perpendicularity is manufactured in the target substrate through laminated printing by using the direct-writing 3D printing technology. The manufacturing efficiency and the precision of the LED retaining wall can be improved. Furthermore, a retaining wall with the same height and width is built around the sub-pixels, so that the contrast of the LED display screen can be enhanced while light leakage is prevented, and the gain of the Mini-LED product and the Micro-LED product is more obvious.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for 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 some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a printing apparatus with LED retaining walls of a display panel according to the present invention;
FIG. 2 is a schematic process flow diagram of a printing apparatus for an LED retaining wall of a display panel according to the present invention;
FIG. 3 is a second schematic process flow diagram of the printing apparatus for LED retaining wall of display panel according to the present invention;
FIG. 4 is a schematic flow chart of a printing method for an LED retaining wall of a display panel according to the present invention;
FIG. 5 is a retaining wall effect diagram of a method for printing LED retaining walls of a display panel according to the present invention;
fig. 6 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application are capable of operation in sequences other than those illustrated or described herein, and that the terms "first," "second," etc. are generally used in a generic sense and do not limit the number of terms, e.g., a first term can be one or more than one.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Fig. 1 is a schematic structural diagram of a printing apparatus for an LED retaining wall of a display panel provided by the present invention. As shown in fig. 1, the printing apparatus for LED retaining wall of display panel according to the embodiment of the present invention includes: and the motion control system 110 is connected with the control terminal 100 and is used for controlling the target LED retaining wall printed on the upper surface of the target substrate on the target station 160.
The target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, and the target substrate comprises a PCB substrate or a glass substrate.
The target substrate is a substrate with a display panel for printing. The display panel includes, but is not limited to, a common LED, a Mini-LED, or a Micro-LED, and the like, which is not particularly limited in this embodiment of the present invention.
The upper surface of the target substrate is provided with an LED light-emitting array of the display panel, and two adjacent LED light-emitting parts in the LED light-emitting array are isolated by utilizing the printed target LED retaining wall.
The target substrate is not particularly limited in the embodiments of the present invention.
Illustratively, the target substrate may be a PCB substrate. The PCB substrate can be formed with LED light emitting arrays in a 'blue 1-green-blue 2' arrangement mode, and after target LED retaining walls are printed at the gaps between every two adjacent LED light emitting components, fluorescent powder is filled in the space where all blue 1 are located, so that the light emitting components at the position are converted into red light from blue light, and a 'red-green-blue' light emitting array is formed.
Illustratively, the target substrate may be a glass substrate. The glass substrate can be printed with a target LED retaining wall, the target LED retaining wall defines a plurality of accommodating parts, each accommodating part can accommodate a blue LED, and the blue LEDs in the corresponding accommodating spaces cover the quantum dot light conversion films and are converted into red light and green light respectively to form a red-green-blue light emitting array.
Specifically, the motion control system 110 in the LED retaining wall printing apparatus of the display panel is connected to the control terminal 100, and can perform programming control according to different requirements, so as to drive different components in the apparatus to perform corresponding actions in corresponding process flows, so as to print out a complete target LED retaining wall in the target substrate.
The driving operation of the motion control system 110 according to the embodiment of the present invention is not particularly limited.
Alternatively, the motion control system 110 may move the target substrate along the X-axis and Y-axis of the stage at the station to pre-print the target substrate in the pre-print zone and move the target substrate to the print start point in the target station 160.
Alternatively, the motion control system 110 may drive the target substrate to perform a printing operation on the target substrate in the target station 160 at a certain motion speed, so that the target LED retaining wall is formed on the upper surface of the target substrate.
Alternatively, the motion control system 110 may drive the various components to zero the device. The driving operation of the motion control system 110 according to the embodiment of the present invention is not illustrated.
The adsorption device 120, connected to the motion control system 110, includes a vacuum pump 121 for adsorbing the lower surface of the target substrate onto the chuck 122.
The vacuum pump 121 is connected to a pneumatic connector on the back surface of the suction cup 122 via an air pipe. The vacuum pump 121 controls a negative pressure by a vacuum solenoid valve for providing a suction force to the suction cup 122.
Specifically, the adsorption device 120 of the printing apparatus of the LED retaining wall of the display panel is connected to the motion control system 110, the lower surface of the target substrate is placed on the suction cup 122, and after it is determined that the lower surface of the target substrate is completely contacted with the suction cup 122, the vacuum solenoid valve is turned on to communicate with the vacuum pump 121, so that the target substrate is vacuum-adsorbed by the suction cup 122, and the flatness of the entire surface of the target substrate is improved.
The material of the suction cup 122 in the embodiment of the present invention is not particularly limited.
Illustratively, the material of the suction cup 122 may be a metal material with certain rigidity and corrosion resistance, such as aluminum and other synthetic metals.
The suction cup 122 may be made of a non-metallic material with certain rigidity and corrosion resistance, such as ceramic, graphite, marble, or the like.
It is to be understood that the operations of fixing the target substrate to the chuck, removing the target substrate, or re-fixing the target substrate to the chuck, etc. may be performed manually by an operator, or may be performed by a robot arm controlled by a control terminal, etc., and the present invention is not limited thereto.
The measurement system 130, connected to the control terminal 100, includes a sensor 131 and a sensor controller 132, the sensor 131 being used to measure flatness data of a target substrate.
Specifically, the measurement system 130 in the printing apparatus for the LED retaining wall of the display panel includes a sensor 131 and a sensor controller 132, and the sensor 131 and the sensor controller 132 are respectively connected to the control terminal 100, and perform fast scanning on the entire target substrate and record substrate flatness data.
The sensor controller 132 generates a scanning route of the sensor 131 according to an instruction received from the control terminal 100, so that after the sensor 131 is fixed at a certain height of the Z axis, the sensor 131 is perpendicular to the horizontal table surface of the workstation (i.e., a plane formed by the X axis and the Y axis), traverses each printing point on the upper surface of the target substrate according to the scanning route with the plane as a reference, scans, and records a reference vertical distance between the sensor 131 and each printing point as flatness data, and stores the flatness data in the local database of the control terminal 100.
The flatness data includes position information of each printing point and a corresponding reference vertical distance.
The embodiment of the present invention does not specifically limit the type of the sensor 131.
Illustratively, the sensor 131 may be a distance measuring sensor based on the Time of Flight (Time of Flight) principle, which uses the speed of light of the modulated light beam and the Time of the round trip propagation over the distance to be measured to find the distance to be measured.
Illustratively, the sensor 131 may be a distance measuring sensor of a geometrical triangulation optical measurement principle.
And a Z-axis controller 140 connected to the control terminal 100, for controlling a print receiving distance between the target multi-pin module 150 and the upper surface of the target substrate.
The Z-axis controller 140 is connected to the control terminal 100, and the control terminal invokes the flatness data stored locally by software to generate an adjustment policy for the print acceptance distance, and sends the adjustment policy to the Z-axis controller 140.
Specifically, the Z-axis controller 140 in the printing apparatus of the LED retaining wall of the display panel is connected to the target multi-pin module 150, and the Z-axis controller 140 receives the adjustment policy sent by the control terminal 100, and adjusts the printing receiving distance between the program target multi-pin module 150 and each printing point on the upper surface of the target substrate.
The print acceptance distance is a reference vertical distance between the target multi-pin module 150 and any printing point of the target substrate during printing, and the print acceptance distances of the printing points are made to be consistent by adjusting a strategy.
The target multi-needle module 150, connected to the Z-axis controller 140, includes a printing needle 150-1 and a fluid control system 150-2, the fluid control system 150-2 being configured to provide predetermined air pressure parameters to the printing needle 150-1.
The target multi-pin module 150 includes a first module 151 and/or a second module 152.
It should be noted that the target multi-pin module 150 is vertically fixed at a certain distance from the upper surface of the target substrate by a mechanical structure.
Specifically, the target multi-pin module 150 in the printing apparatus of the LED retaining wall of the display panel is connected to the Z-axis controller 140 to drive the target multi-pin module 150 to adjust the printing receiving distance by traversing each printing point and printing according to the adjustment strategy of the printing receiving distance obtained in advance during the movement of the target substrate carried by the adsorption device.
The target multi-needle module 150 includes one or more printing needles 150-1, and a fluid control system 150-2.
The embodiments of the present invention do not specifically limit the types of the printing needle 150-1 and the fluid control system 150-2.
Illustratively, the printing needle 150-1 is made of a material including, but not limited to, ceramic, glass, resin, or steel, and has a wide top and a narrow bottom, and the flow channel can reduce the slurry resistance and ensure that the discharge of each needle of the multi-needle module is stable and the discharge rate is the same. The inner diameter of the lower port of the slurry outlet flow channel is used as a printing needle head 150-1, and completely consistent inner diameter parameters are preset for each printing needle head 150-1 in the target multi-needle module 150 so as to ensure that the printing line widths of the target LED retaining walls are consistent.
The fluid control system 150-2, which may be a pneumatic dispenser, is connected to the control terminal to control the flow rate of the slurry. Completely consistent air pressure parameters are preset for all printing needle heads 150-1 in the target multi-needle module 150, so that stable discharging of the paste extruded to each printing needle head 150-1 is ensured.
Preferably, the target multi-pin module 150 in the printing apparatus of the LED retaining wall of the display panel comprises more than one sub-module, wherein each sub-module may comprise one or more printing pin heads 150-1 and a fluid control system 150-2. The embodiment of the present invention is not particularly limited thereto.
Illustratively, the target multi-pin module 150 may include two sub-modules, i.e., a first module 151 and a second module 152, wherein the plurality of printing pins 150-1 in the first module 151 and the second module 152 are arranged laterally and longitudinally, respectively, at a preset pitch parameter.
Illustratively, the target multi-pin module 150 may include a sub-module, i.e., the first module 151 or the second module 152, wherein the first module 151 (or the second module 152) includes only one printing pin head 150-1, or includes a plurality of printing pin heads arranged with a predetermined pitch parameter.
And the target station 160 is connected with the motion control system 110 and is used for accommodating the target substrate so that the target multi-needle module 150 performs the stacked printing of the target LED retaining wall on the upper surface of the target substrate.
The target station 160 includes a first station 161 and/or a second station 162, the target LED retaining wall includes a lateral LED retaining wall and a longitudinal LED retaining wall, the first module 151 is matched with the first station 161, and the second module 152 is matched with the second station 162.
Specifically, the suction cup 122 of the printing apparatus for the LED retaining wall of the display panel is transferred to the horizontal table of the target station (i.e. the plane formed by the X axis and the Y axis), so that the target substrate adsorbed by the suction cup 122 is completely within the range of the horizontal table, the adsorption device 120 is driven by the motion control system to drive the target substrate to move along a predetermined track on the horizontal table, and meanwhile, the target multi-pin module 150 corresponding to the target station 160 is driven by the Z axis controller 140 to print the target LED retaining wall on the upper surface of the target substrate.
Preferably, the target station 160 in the LED retaining wall printing apparatus for the display panel comprises more than one station, wherein each station can accommodate a target substrate, and the target LED retaining wall is printed by using a 3D direct-write printing technology. The embodiment of the present invention is not particularly limited thereto.
Illustratively, the object stations 160 may include two stations, i.e., a first station 161 and a second station 162, wherein the first station 161 may correspond to the first module 151 and the second station 162 may correspond to the second module 152.
After the needles transversely arranged in the first module 151 are fixed in the first station 161, the motion control system 110 drives the adsorption device 120 to vertically move along each printing point on the Y axis to the bottom end of the target substrate by taking the upper left of the target substrate as an initial point, and the lamination printing is performed in the back and forth process to generate a complete longitudinal LED retaining wall.
After the needles arranged in the first module 152 in the longitudinal direction are fixed in the second station 162, the motion control system 110 drives the adsorption device 120 to move horizontally along each printing point on the X-axis to the right side of the target substrate with the upper left of the target substrate as an initial point, and the lamination printing is performed in the back and forth process to form a complete lateral LED retaining wall.
Illustratively, the object station 160 may include one station, i.e., a first station 161 or a second station 162. After the first module 151 (or the second module 152) is fixed, the motion control system 110 drives the adsorption device 120 to move vertically to the bottom end with the upper left of the target substrate as an initial point, and the lamination printing is performed in the back-and-forth process to generate a complete longitudinal LED retaining wall. After the motion control system 110 drives the first station 161 (or the second station 162) to rotate by 90 °, the adsorption device 120 is driven to perform lamination printing with the same motion trajectory, so as to generate a complete lateral LED retaining wall.
The color of the target LED retaining wall is not particularly limited in the embodiments of the present invention.
Alternatively, the target LED retaining wall may have a uniform color to achieve a wall with a uniform reflectivity.
For example, since white has a high reflectivity, the whole of the target LED retaining wall can be set to white, and the white light formed by each group of LEDs does not have doping of other colors, so that the contrast is greatly improved, and the overall brightness is increased. Even for Mini-LED products and Micro-LED products with small LED gaps, retaining walls with consistent width and height and uniform wall bodies can be generated, the preparation accuracy and efficiency of the retaining walls are really improved, and further the overall brightness and contrast are greatly improved.
Alternatively, the target LED retaining wall may have a non-uniform color to achieve a corresponding reflectivity at different locations of the wall.
Exemplarily, in the process of printing the target LED retaining wall, the color of the retaining wall at the bottommost layer is set to be white, and the saturation of the color is sequentially increased in the process of printing layer by layer to form a gradient wall so as to improve the luminous efficiency of each LED lamp bead.
It can be understood that, in the manufacturing process of the printing device of the LED retaining wall of the display panel, a colored coating may be further disposed on the inner wall or the outer wall of the target LED retaining wall according to the actual task requirement, so as to achieve the corresponding effect.
For example, in the case where the LED does not emit light normally, a black coating may be provided on the top of the dam (upper outer wall) to make the black displayed externally uniform. Meanwhile, under the condition that the LEDs normally emit light, the wall with the same width and height can still ensure that each LED has a good reflection effect, and the luminosity is improved.
According to the embodiment of the invention, the target multi-needle module is controlled in the target station based on the Z-axis controller, the motion process of the target substrate in the XY plane is controlled through the motion control system, and after the printing receiving distance of the target multi-needle module is adjusted in each printing point, the target LED retaining wall with consistent width and high verticality is manufactured in the target substrate through laminated printing by using a direct-writing 3D printing technology. The manufacturing efficiency and the precision of the LED retaining wall can be improved. Furthermore, a retaining wall with the same height and width is built around the sub-pixels, so that the contrast of the LED display screen can be enhanced while light leakage is prevented, and the gain of the Mini-LED product and the Micro-LED product is more obvious.
On the basis of any of the above embodiments, the target station 160 further includes: and the cleaning area is used for cleaning and storing the printing needle head.
Specifically, after the printing device of the LED retaining wall of the display panel completes all printing tasks at the target station 160, the motion control system 110 receives an instruction from the control terminal, and drives the cleaning area to move to the position of the target multi-pin module 150, so that each printing needle 150-1 in the target multi-pin module 150 is immersed in the solvent in the cleaning area for liquid-sealed storage at room temperature.
And the preprinting area is used for preprinting under the preset air pressure parameters until the printing needle head stably discharges materials, and the motion control system 110 controls the adsorption device 120 to leave the preprinting area.
Specifically, after the flatness scanning task of the measurement system 130 is completed in the target station 160, the motion control system 110 drives the adsorption device 120 to move to the pre-printing area, the control terminal 100 drives the fluid control system 150-2 according to the predetermined air pressure parameter, and after the slurry is extruded to each needle of the plurality of needles and starts to be stably discharged (only the first product needs to be extruded for pre-printing after the material change), the adsorption device 120 is controlled to carry the target substrate to transfer to the printing starting point.
According to the embodiment of the invention, the pre-printing area and the cleaning area are arranged in the target station, and before printing, operation is carried out through the pre-printing area, so that the discharging speeds of all printing needle heads are consistent. After printing, cleaning preservation is performed by the cleaning area. The service life can be prolonged when the printing task is not executed, and the manufacturing stability of the LED retaining wall is improved when the printing task is executed.
On the basis of any of the above embodiments, the motion control system 110 is specifically configured to control the adsorption device 120 to move in the XY plane under the condition that the target station 160 includes the first station 161 and the second station 162, so that the first module 151 prints out the longitudinal LED retaining walls on the target substrate in the first station.
It should be noted that, the application scenario of the printing apparatus for the LED retaining wall of the display panel is that there are two operation stations and two multi-pin modules, a relative position relationship is set for each group of operation stations and multi-pin modules in advance, and transverse and longitudinal printing is performed by using different multi-pin modules at different operation stations.
Specifically, the chuck 122 is driven by the motion control system 110 to be transferred into the first station 161, and from the initial printing point of the target substrate, the target substrate carried by the chuck 122 moves in the XY plane according to a predefined trajectory route, so that the fixed first module 151 performs layer-by-layer printing at each printing point in each row traversing the target substrate in the first station 161, and a plurality of complete longitudinal LED retaining walls are generated.
It is understood that, when the adsorption device 120 completes the track route, i.e. the first module 151 completes the traversal of all the printing points, the motion control system 110 receives a corresponding feedback message to know that the lateral LED retaining wall is completely printed.
And sending a first motion instruction to the adsorption device so that the adsorption device transfers the target substrate to the XY plane of the second station to move according to the first motion instruction, and the second module prints out the transverse LED retaining wall on the target substrate in the second station.
Specifically, the motion control system 110 sends a first motion instruction to the suction device 120 after knowing that the printing of the longitudinal LED retaining wall is completed.
The first motion command is an operation command for controlling the transfer station of the adsorption device 120. The first motion command is used to make the chuck 122 in the suction device 120 carry the target substrate with the longitudinal LED retaining walls generated, and transfer the target substrate to the second station 162, and from the last printing end point, the motion control system 110 drives the chuck 122 to carry the target substrate to move in the XY plane according to the predefined trajectory route, so that the fixed second module 152 performs layer-by-layer printing at each printing point in each line traversing the target substrate in the second station 162, and generates a plurality of complete lateral LED retaining walls.
According to the embodiment of the invention, on the basis of a direct-writing 3D printing technology in a first station and a second station through corresponding first modules and second modules respectively, a transverse LED retaining wall and a longitudinal LED retaining wall which are consistent in width and high in verticality are manufactured in a target substrate through lamination printing. The manufacturing efficiency and the precision of the LED retaining wall can be improved.
On the basis of any of the above embodiments, the motion control system 110 is specifically configured to control the adsorption device to move in the XY plane when the target station includes the first station or the second station, so that the target multi-needle module prints out the longitudinal LED retaining wall on the target substrate in the target station 160.
It should be noted that, the application scenario of the printing apparatus for the LED retaining wall of the display panel is that only one operation station and one multi-pin module are provided, and the operation station is twisted to change the relative position relationship between the operation station and the multi-pin module, so that the operation station and the multi-pin module can respectively perform horizontal and vertical printing.
The target station may be any one of the first station 161 or the second station 162.
Correspondingly, a target multi-needle module 150 is correspondingly arranged in the station, and the module can be a first module 151 with printing needle heads arranged transversely or a first module 152 with printing needle heads arranged longitudinally.
Specifically, the suction cup 122 is driven by the motion control system 110 to be transferred into the target station 160, and from the initial printing point of the target substrate, the target substrate carried by the suction cup 122 moves in the XY plane according to a predefined trajectory route, so that the fixed target multi-pin module 150 performs layer-by-layer printing at each printing point in each row traversing the target substrate in the target station 160, and a complete longitudinal LED retaining wall is generated. It is understood that after the target multi-pin module 150 completes traversing all the printing points, the motion control system 110 receives a corresponding feedback message to know that the printing of the vertical LED retaining wall is completed.
And sending a second motion command to the target station 160, so that after the target station 160 rotates by 90 degrees according to the second motion command, the adsorption device is driven to move in the XY plane, so that the target multi-needle module 150 prints a transverse LED retaining wall on the target substrate in the target station 160.
Specifically, the motion control system 110 sends a second motion command to the target station 160 after knowing that the printing of the longitudinal LED retaining wall is completed.
The second movement command is a motion command for controlling the rotation of the target station 160. And the second motion instruction is used for enabling the target station 160 to cooperate with the target substrate which has generated the longitudinal LED retaining wall, and after rotating by 90 °, starting from the last printing end point, the motion control system 110 drives the suction cup 122 to carry the target substrate to move in the XY plane according to a predefined trajectory route, so that the fixed target multi-needle module 150 performs layer-by-layer printing at each printing point in each row of the target substrate traversed in the target station 160, and a plurality of complete transverse LED retaining walls are generated. It can be understood that the vertical LED retaining walls and the horizontal LED retaining walls do not have an absolute printing sequence, but are determined by the track routes of the target multi-pin module 150 and the adsorption device 120 carrying the target substrate, i.e. it is required to ensure that the pin arrangement direction of the target multi-pin module 150 is perpendicular to the moving direction of the target substrate from the initial printing point.
According to the embodiment of the invention, based on a direct-writing 3D printing technology of a corresponding target multi-needle module in a first station or a second station, a transverse LED retaining wall and a longitudinal LED retaining wall which are consistent in width and high in verticality are manufactured by respectively performing laminated printing through the first station or the second station in cooperation with a target substrate to perform direction rotation change. The manufacturing efficiency and the precision of the LED retaining wall can be improved.
On the basis of any of the above embodiments, the Z-axis controller 140 includes one or more.
Specifically, the Z-axis controller 140 in the printing apparatus with LED retaining walls of the display panel and the target multi-pin module 150 have a one-to-one corresponding connection relationship, so that the Z-axis controller 140 can control the corresponding target multi-pin module 150 to move on the Z-axis, thereby adjusting the printing receiving distance.
The number of the Z-axis controllers 140 is not particularly limited in the embodiments of the present invention.
Alternatively, the number of the Z-axis controllers 140 may be one. Accordingly, the target multi-pin module 150 arranges a plurality of printing pins 151 having a smaller outlet inner diameter at a minute pitch. Therefore, when the target multi-needle module 150 is at any printing point, the Z-axis controller controls the target multi-needle module to adjust the printing receiving distance, and the target multi-needle module 150 with a plurality of printing needle heads 151 prints out the corresponding wall width.
Alternatively, the number of the Z-axis controllers 140 may be plural. Correspondingly, a target multi-pin module 150 is provided to be connected to each Z-axis controller 140, each target multi-pin module 150 has a printing pin 151 with a larger outlet inner diameter, and the target multi-pin modules 150 are arranged at a larger pitch. Therefore, each target multi-pin module 150 is controlled by the corresponding Z-axis controller to adjust the printing receiving distance in any corresponding printing point, so that one target multi-pin module 150 prints out the corresponding wall width, and a plurality of target multi-pin modules 150 simultaneously print out a plurality of target LED retaining walls.
According to the embodiment of the invention, one or more Z-axis controllers are arranged, the printing receiving distance is adjusted in the target station by controlling the target multi-needle module, and then the target LED retaining walls with consistent width and high verticality are manufactured in the target substrate by laminating printing by using a direct-writing 3D printing technology. The manufacturing efficiency, the precision and the flexibility of the LED retaining wall can be improved.
Exemplarily, fig. 2 is one of the process flow diagrams of the printing apparatus for the LED retaining wall of the display panel provided in the present invention. Fig. 3 is a second process flow diagram of the printing method for the LED retaining wall of the display panel according to the present invention. As shown in fig. 2 and fig. 3, a specific embodiment of a printing process flow of the target LED retaining wall is given.
Firstly, feeding and machine station preparation:
(1) the needle cylinder is filled with printing materials and then is arranged on a pneumatic dispenser;
(2) the automatic feeding of the substrate in the feeding area is realized, the automatic software is started, the vacuum pump starts the sucker to automatically adsorb the substrate, the ceramic sucker is automatically transferred to the station 1, and the automatic mechanical zeroing alignment and the levelness adjustment are realized;
(3) and (5) rapidly scanning the whole substrate by using a high-precision height measuring instrument, and recording the flatness data of the substrate.
(4) In the preprinting area, the pneumatic dispenser is automatically started, the flow rate is controlled by automatic software, and after the slurry is extruded out to a plurality of needles and each needle head starts to stably discharge (only the first product needs to be extruded out for preprinting after material change), the plurality of needles start to be transferred to the printing starting point;
secondly, sample printing:
(5) after the transverse retaining wall and longitudinal retaining wall multi-needle module is transferred to a printing starting point, automatically adjusting the distance between a needle head and a substrate to be the height of the retaining wall according to a control terminal visual algorithm, and adjusting the printing height by using a software to call the flatness data of the substrate so as to ensure that the distance between the needle head and the substrate is kept consistent in the printing process;
(6) adjusting the parameters of air valves for connecting the multi-needle modules of the transverse and longitudinal retaining walls to be completely consistent so as to ensure that the printing line widths of the transverse and longitudinal retaining walls are consistent;
(7) the ceramic sucker is automatically transferred to the station 1 to move, and the printing of the transverse retaining wall is completed;
(8) the ceramic sucker is automatically transferred to the station 2 for movement, and the printing of the longitudinal retaining wall is completed;
(9) and (5) repeating the steps (6) to (8) to perform laminated printing until the retaining wall with the target height is printed.
(10) Closing the vacuum pump, blanking the substrate, manually moving the substrate into the heating oven for baking, and after the retaining wall is completely cured, finishing the retaining wall printing of the single substrate;
(11) and (4) automatically transferring the ceramic sucker carrier to a station 1, repeating the steps (2) to (8) and printing a subsequent sample.
Fig. 4 is a schematic flow chart of a printing method for the LED retaining wall of the display panel according to the present invention. Based on the content of any of the above embodiments, as shown in fig. 4, the method for printing the LED retaining wall of the display panel includes: step 401, taking the print task as a guide, performing a preparation operation before printing, and scanning the target substrate through a measurement system of the printing device of the LED retaining wall of the display panel to obtain flatness data of the target substrate.
The printing task at least comprises the step of determining a target line width and a target height according to a target substrate.
It should be noted that the main execution body of the printing method for the LED retaining wall of the display panel provided by the embodiment of the present invention is a printing apparatus for the LED retaining wall of the display panel.
The application scene of the printing method of the LED retaining wall of the display panel provided by the embodiment of the invention is determined by the printing task of the target substrate. The printing task includes, but is not limited to, determining a printing object as a target substrate, and determining a target line width and a target height of a retaining wall according to the size of each LED light emitting component in an LED light emitting array in the target substrate.
Specifically, in step 401, an operator performs a feeding operation and a platform preparation operation in the printing device of the LED retaining wall of the display panel with the print task as a guide, and after the platform preparation operation, the measurement system of the printing device of the LED retaining wall rapidly scans the entire target substrate and records the flatness data of the target substrate.
The flatness data refers to the measured vertical distance from the measurement system sensor to each printed point on the target substrate as the measurement system traverses the printed point.
Step 402, the motion control system moves the target multi-pin module to the printing starting point of the target substrate, and based on the received flatness data, the printing receiving distance of the multi-pin module is adjusted by using the Z-axis controller.
Note that the printing start point refers to the first printing point in the target substrate. The printing starting point is used for printing operation at the point to form an LED retaining wall. The position of the printing start point and the target substrate have a relative position relationship, and the printing start point may be at the upper left corner, the upper right corner, the lower left corner, the lower right corner, and the like of the target substrate.
It will be appreciated that the print starting point may determine the trajectory of the movement of the suction device carrying the target substrate in the XY plane of the target station.
Specifically, in step 402, after the motion control system in the printing apparatus of the LED retaining wall of the display panel moves the multi-pin module to the printing start point of the target substrate, an adjustment strategy is generated by using a control terminal vision algorithm according to the flatness data obtained in step 401, and the Z-axis controller is driven to adjust the printing receiving distance between the target multi-pin module and the target substrate according to the adjustment strategy.
The printing receiving distance refers to the vertical distance between the target multi-pin module and each printing point when the target multi-pin module traverses to the printing point in the target substrate. The print acceptance distance is not particularly limited in the embodiment of the present invention.
For example, if there is only one printing head in the target multi-needle module, the print receiving distance is the perpendicular distance between the printing head and any printing point.
Illustratively, if the target multi-pin module has N printing pins arranged horizontally or vertically, and N printing dots corresponding to each pin form a printing dot array, the print receiving distance is a vertical distance between the target multi-pin module and the printing dot array, where N is a positive integer.
And 403, performing stacked printing on the upper surface of the target substrate on the target station by the target multi-pin module based on the preset air pressure parameter and the target line width, and curing to generate the target LED retaining wall under the condition that the printing height meets the target height range.
The target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, and the printing height is an accumulated layer height corresponding to the number of printing layers.
It should be noted that the parameters set before step 403 include, but are not limited to, the predetermined air pressure parameter and the target line width.
And the air pressure parameter is used for driving a fluid control system in the printing equipment of the LED retaining wall of the display panel to control discharging. The gas pressure parameter may be measured in megapascals (MPa) or Pounds force per square inch (psi), and is not particularly limited in this regard.
The target line width corresponds to the inner diameter parameter of the printing needle head, and the printing needle heads with different inner diameters can print retaining walls with different line widths. The value range of each parameter is not particularly limited in the embodiment of the present invention.
The value range of the inner diameter parameter of the printing needle head can be 20-70 μm, and the value of the inner diameter parameter of the printing needle head is not particularly limited in the embodiment of the invention because the inner diameter of the printing needle head greatly influences the printed target line width.
Preferably, the inner diameter parameter of the printing needle head ranges from 45 μm to 60 μm.
The value range of the target line width can be 10 μm to 100 μm, and the value of the target line width is not specifically limited in the embodiment of the present invention because different display panels have different sub-pixel pitches.
Preferably, the target line width ranges from 50 μm to 80 μm.
It can also preset:
and the movement speed of the adsorption device is used for driving the adsorption device in the printing equipment of the LED retaining wall of the display panel to move.
The target height range refers to a restriction condition of the printing height. The target height range may be a range section divided by the target height, and the target height range may be a range section formed by the target height and an acceptable tolerance range thereof. The height of the retaining wall can be 10 μm to 200 μm, and the target height is not specifically limited in the embodiments of the present invention because different display panels have different thicknesses and different manufacturing processes.
Preferably, the target height ranges from 150 μm to 200 μm.
Specifically, in step 403, an air pressure parameter, a moving speed of a printing needle, and a target line width are preset for a printing device of the LED retaining wall of the display panel to drive the printing needle of the target multi-needle module to move from a printing start point to a last printing point in a row or a column where the printing point is located on the target substrate, and a first printing layer is generated with a corresponding line width and layer height, and so on, and after a plurality of printing layers are stacked, a target LED retaining wall is formed through a curing operation.
The target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, and the transverse LED retaining wall and the longitudinal LED retaining wall are different in size. The width of the target LED retaining wall is the target line width, and the height of the target LED retaining wall is the printing height, namely the product of the number of printing layers and the layer height. The length of the target LED retaining wall is the product of the movement speed and the movement time of the printing needle head.
Preferably, the printing equipment of display panel's LED barricade is with preset atmospheric pressure parameter, printing syringe needle velocity of motion and target linewidth, and the drive is printed the syringe needle and is generated first printing layer with corresponding linewidth and layer height, via a plurality of printing layer stack backs, can carry out fast scan by measurement system again, acquires the actual value of printing the height to compare with the target height scope of setting for in the print task, the contrast result divide into: success and failure of the comparison, wherein:
and successfully comparing, namely, the actual value of the printing height formed by the laminated printing is within the target height range, namely, the difference between the actual value and the target height is equal to 0 or close to 0, the target substrate can be blanked and moved into the heating oven to be baked, the retaining wall is completely cured, and the target LED retaining wall of the target substrate is printed.
And comparing failure, namely, indicating that the actual value of the printing height formed by the laminated printing is not in the target height range, namely, the difference between the actual value and the printing height is beyond the acceptable tolerance range, and further processing the target substrate according to the actual failure condition until the target substrate reaches the blanking standard.
Fig. 4 is a retaining wall effect diagram of a method for printing an LED retaining wall of a display panel according to the present invention. As shown in fig. 4, an embodiment of the invention provides a schematic shape diagram of a target LED retaining wall formed by curing a target substrate after blanking.
It can be understood that the material can be cured by infrared curing, which can reach the effect of baking in a high-temperature oven for one hour in several minutes and improve the curing efficiency. In addition, the infrared curing device is small in size and can be easily integrated into printing equipment, so that the equipment integration level is high.
In addition, the printing material can be selected, wherein the printing material generally has no conductivity and can be silicon gel, epoxy resin and other materials.
According to the embodiment of the invention, the target multi-needle module is controlled in the target station based on the Z-axis controller, the motion process of the target substrate in the XY plane is controlled through the motion control system, and after the printing receiving distance of the target multi-needle module is adjusted in each printing point, the target LED retaining wall with consistent width and high verticality is manufactured in the target substrate through laminated printing by using a direct-writing 3D printing technology. The manufacturing efficiency and the precision of the LED retaining wall can be improved. Furthermore, a retaining wall with the same height and width is built around the sub-pixels, so that the contrast of the LED display screen can be enhanced while light leakage is prevented, and the gain of the Mini-LED product and the Micro-LED product is more obvious.
On the basis of any one of the above embodiments, adjusting the print acceptance distance of the multi-pin module based on the received flatness data includes: and acquiring the vertical distance between each printing point of the target substrate and the target multi-needle module based on the flatness data and the target corresponding relation, and taking the vertical distance as an actual value of the printing receiving distance.
The target corresponding relationship refers to a relative position relationship between a sensor and a target multi-needle module in a measurement system.
Specifically, the printing equipment of the LED retaining wall of the display panel calls the flatness data of the substrate, converts the distance between the sensor and the corresponding printing point into the vertical distance between the target multi-needle module and the corresponding printing point by utilizing the target corresponding relation, and takes the vertical distance as the actual value of the printing receiving distance.
Under the condition that the target multi-needle module is positioned at a printing point, adjusting the actual value of the printing receiving distance to the target value of the printing receiving distance through a Z-axis controller;
wherein, the target value of the printing receiving distance corresponding to each printing point is the same.
The target value of the print acceptance distance needs to be set in advance. Illustratively, the target value of the print acceptance distance may be set when the print job is specified.
Specifically, in the process of actually executing a printing task, the printing apparatus of the LED retaining wall of the display panel aligns each printing point in the target substrate carried by the adsorption device with the target multi-pin module, and then the Z-axis controller drives the target multi-pin module to adjust the actual value of the printing receiving distance to the target value along the Z-axis in the printing point (i.e. the fixed X-axis coordinate and the fixed Y-axis coordinate), so that each pin is printed at the same printing receiving distance at the corresponding printing point after adjustment.
According to the embodiment of the invention, the target multi-needle module is controlled to perform direct-writing 3D printing in the target station based on the Z-axis controller at the same printing receiving distance at each printing point. Errors caused by unevenness of the target substrate can be eliminated, and further, the manufacturing efficiency and the precision of the LED retaining wall are improved.
On the basis of any of the above embodiments, the preparatory operation before printing is performed, including: after the printing material is filled into the syringe, the printing needle is mounted on the syringe, and the syringe and the fluid control system are connected through the printing needle.
The printing material is matched with the width-height ratio formed by the printing material, the inner diameter parameter of the printing needle head is matched with the target line width, and the number of printing layers is set based on the width-height ratio of the target LED retaining wall, the target line width and the target height.
It should be noted that the target line width of the printed LED retaining wall is determined by the material characteristics of the printing material, the pressure applied by the fluid control system, and the inner diameter of the printing needle.
The printing material refers to a fluid material with certain viscosity, and can be cured after being processed. The viscosity of the printing material may range from 400000cp to 800000 cp. The viscosity of the printing material is not particularly limited in the embodiments of the present invention because the requirements of the printing job are different.
Preferably, the viscosity of the printing material may range from 500000cp to 600000 cp.
Specifically, in step 401, with the target line width in the print job as a guide, according to the corresponding relationship between the viscosity of the printing material and the aspect ratio of the printing formation of the printing needle, a suitable printing material is selected and poured into the syringe, the printing needle is installed at the lower end of the syringe, the printing needle faces downward, and the printing material is controlled by the fluid control system to flow out from the printing needle, so as to form a printing layer with the size being the line width corresponding to the inner diameter parameter and the layer height derived from the aspect ratio.
It will be appreciated that the layer height, derived from the line width and aspect ratio, may be derived before the actual print job is performed, and that the number of print layers may be derived in addition to the target height. Further, in the process of actually executing the print job, after the printing after the designated number of print layers is completed, the print height formed by stacking is compared with the target height to determine whether the print job is completed.
It will be appreciated that since the color of the retaining wall may be a solid color or a gradient color, the printing material needs to be formulated to the corresponding color.
Illustratively, white dams of consistent width and height can be created by blending the color of the marking material to white and pouring into a syringe for layer-by-layer printing.
Illustratively, when printing a first layer, the color of the printing material is adjusted to white for printing, then the printing material is moved to a cleaning area to clean the residual material in the syringe, the printing material with gradually increased color saturation is injected for printing a second layer, and the like, so that the gradient color retaining wall with consistent width and height is generated.
And controlling the motion control system through the control terminal to perform mechanical zeroing operation.
Specifically, before each printing task is executed by the printing equipment of the LED retaining wall of the display panel, the automatic software is started at the control terminal so as to drive the motion control system to automatically and mechanically return to zero, align and adjust the levelness of the machine equipment.
The embodiment of the invention is based on that before printing, proper printing materials are selected and mechanical zero resetting is executed. The materials can be selected according to different printing requirements, conditions for executing different printing modes are consistent, and therefore manufacturing efficiency and precision of the LED retaining wall are improved.
On the basis of any one of the above embodiments, before the motion control system moves the target multi-pin module to the printing starting point of the target substrate, pre-printing is performed under a preset air pressure parameter until the printing pin head stably discharges materials, and the motion control system controls the adsorption device to leave the pre-printing area.
Specifically, before actually executing a printing task, the printing device of the LED retaining wall of the display panel drives the fluid control system at a predetermined air pressure parameter in the preprinting area to control the flow rate of the printing material, and after the slurry is extruded to each needle and starts to stably discharge (only the first product needs to be extruded for preprinting after the material change), the motion control system drives the adsorption device to transfer the target substrate to the printing starting point.
The embodiment of the invention enables the discharging speeds of all printing needle heads to be consistent based on operation in the preprinting area. The manufacturing stability of the LED retaining wall can be improved when a printing task is executed.
On the basis of any one of the above embodiments, based on the preset air pressure parameter and the target line width, the target multi-pin module performs stacked printing on the upper surface of the target substrate on the target station, and generates the target LED retaining wall when the printing height meets the target height, including: based on preset air pressure parameters and target line width, the first module conducts laminated printing on the upper surface of the target substrate on the first station, and the transverse LED retaining wall is generated under the condition that the printing height meets the target height range.
It should be noted that the application scenario of the printing apparatus for the LED retaining wall of the display panel is that there are two operation stations and two multi-needle modules, a relative position relationship is set for each group of operation stations and multi-needle modules in advance, and different multi-needle modules are used for performing horizontal and vertical printing at different operation stations.
Specifically, in step 403, the chuck carries the target substrate and transfers to the first station, and from the initial printing point of the target substrate, the control terminal controls the motion control system to drive the chuck to carry the target substrate to move in the XY plane at a certain speed according to a predetermined trajectory route. Meanwhile, a proper first module is configured according to a preset target line width, a control terminal controls to set a preset air pressure parameter to the fluid control system, so that the first module traverses each printing point in each row of the target substrate in a first station, and printing layer by layer is carried out after the printing receiving distance is adjusted along the Z axis at the printing point, and a plurality of complete longitudinal LED retaining walls are generated. It can be understood that, after the first module completes traversing all the printing points, the motion control system receives a corresponding feedback message to know that the printing of the lateral LED retaining wall is completed. And sending a first motion instruction to the adsorption device, so that the adsorption device transfers the target substrate to a second station according to the first motion instruction, and the second module prints out the transverse LED retaining wall.
Based on the preset air pressure parameter and the target line width, the second module conducts laminating printing on the upper surface of the target substrate on the second station, and the transverse LED retaining wall is generated under the condition that the printing height meets the target height range.
Specifically, the sucker in the suction device carries the target substrate with the longitudinal LED retaining wall generated, the target substrate is transferred to a second station, and the motion control system is controlled by the control terminal from the last printing termination point of the target substrate, so that the sucker is driven to carry the target substrate to move in an XY plane at a certain speed according to a preset track route. Meanwhile, a proper second module is configured according to a preset target line width, a control terminal controls and sets a preset air pressure parameter to a fluid control system, so that the second module traverses each printing point in each line of the target substrate in a second station, and performs layer-by-layer printing after adjusting the printing receiving distance along the Z axis at the printing point, and a plurality of complete transverse LED retaining walls are generated.
According to the embodiment of the invention, on the basis of a direct-writing 3D printing technology in a first station and a second station through corresponding first modules and second modules respectively, a transverse LED retaining wall and a longitudinal LED retaining wall which are consistent in width and high in verticality are manufactured in a target substrate through lamination printing. The manufacturing efficiency and the precision of the LED retaining wall can be improved.
On the basis of any one of the above embodiments, the target multi-pin module performs stacked printing on the upper surface of the target substrate on the target station based on the predetermined air pressure parameter and the target line width, and generates the target LED retaining wall when the printing height meets the target height range, including: and based on the preset air pressure parameter and the target line width, the target multi-needle module performs stacked printing on the upper surface of the target substrate on the first station or the second station, and generates a longitudinal LED retaining wall under the condition that the printing height meets the target height.
It should be noted that, the application scenario of the printing apparatus for the LED retaining wall of the display panel is that only one operation station and one multi-pin module are provided, and the operation station is twisted to change the relative position relationship between the operation station and the multi-pin module, so that the operation station and the multi-pin module can respectively perform horizontal and vertical printing.
The target station may be any one of the first station and the second station.
Correspondingly, a target multi-needle module is correspondingly arranged in the station, and the module can be a first module with printing needle heads arranged in a transverse direction or a first module with printing needle heads arranged in a longitudinal direction.
Specifically, the sucker is transferred to a target station, and from a printing initial point of a target substrate, the control terminal controls the motion control system to drive the sucker to carry the target substrate to move in an XY plane at a certain speed according to a preset track route. Meanwhile, a proper target multi-needle module is configured according to a preset target line width, a control terminal controls to set a preset air pressure parameter to a fluid control system, so that the target multi-needle module traverses each printing point in each row of a target substrate in a target station, printing layer by layer is carried out after the printing receiving distance is adjusted along the Z axis at the printing point, and a plurality of complete longitudinal LED retaining walls are generated. And sending a second motion instruction to the target station, so that the target station rotates by 90 degrees according to the second motion instruction, and then the target multi-needle module prints out the transverse LED retaining wall.
And rotating the first station or the second station by 90 degrees, performing stacked printing on the upper surface of the target substrate by the target multi-needle module, and generating the longitudinal LED retaining wall under the condition that the printing height meets the target height.
Specifically, the target station cooperates with the target substrate on which the transverse LED retaining wall is generated, and after the target substrate is rotated by 90 degrees, the motion control system is controlled by the control terminal from the last printing endpoint of the target substrate, so that the control terminal drives the sucker to carry the target substrate to move in the XY plane at a certain speed according to a preset track route. Meanwhile, a proper target multi-needle module is configured according to a preset target line width, a control terminal controls to set a preset air pressure parameter to the fluid control system, so that the target multi-needle module traverses each printing point in each row of the target substrate in a target station, and printing layer by layer is carried out after the printing receiving distance is adjusted along the Z axis at the printing point, and a plurality of complete transverse LED retaining walls are generated.
Fig. 5 is a retaining wall effect diagram of a method for printing an LED retaining wall of a display panel according to the present invention. For example, as shown in fig. 5, after the corresponding process flow is executed by the LED retaining wall printing method, retaining walls with consistent width and height can be established around three single LEDs in each group of LEDs on the substrate.
According to the embodiment of the invention, based on a direct-writing 3D printing technology of a corresponding target multi-needle module in a first station or a second station, a transverse LED retaining wall and a longitudinal LED retaining wall which are consistent in width and high in verticality are manufactured by respectively performing laminated printing through the first station or the second station in cooperation with a target substrate to perform direction rotation change. The manufacturing efficiency and the precision of the LED retaining wall can be improved.
Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a processor (processor)610, a communication Interface (Communications Interface)620, a memory (memory)630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform a method of printing the LED banks of the display panel, the method comprising: taking a printing task as a guide, performing preparation operation before printing, and scanning a target substrate through a measuring system of a printing device of an LED retaining wall of a display panel to obtain flatness data of the target substrate; the motion control system moves the target multi-needle module to the printing starting point of the target substrate, and based on the received flatness data, the printing receiving distance of each printing needle head in the target multi-needle module is adjusted by using the Z-axis controller; based on the preset air pressure parameter, the preset movement speed of the printing needle head and the target line width, the target multi-needle module is subjected to laminating printing on the upper surface of the target substrate on the target station, and the target LED retaining wall is generated by solidification under the condition that the printing height meets the target height range; the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the printing height is an accumulated layer height corresponding to the number of printing layers, and the printing task at least comprises the step of determining a target line width and a target height according to the target substrate.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention further provides a computer program product, the computer program product comprising a computer program, the computer program being stored on a non-transitory computer readable storage medium, wherein when the computer program is executed by a processor, the computer is capable of executing the method for printing the LED retaining wall of the display panel provided by the above methods, the method comprising: taking a printing task as a guide, performing preparation operation before printing, and scanning a target substrate through a measuring system of a printing device of an LED retaining wall of a display panel to obtain flatness data of the target substrate; the motion control system moves the target multi-needle module to the printing starting point of the target substrate, and based on the received flatness data, the printing receiving distance of each printing needle head in the target multi-needle module is adjusted by using the Z-axis controller; based on the preset air pressure parameter, the preset movement speed of the printing needle head and the target line width, the target multi-needle module is subjected to laminating printing on the upper surface of the target substrate on the target station, and the target LED retaining wall is generated by solidification under the condition that the printing height meets the target height range; the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the printing height is an accumulated layer height corresponding to the number of printing layers, and the printing task at least comprises the step of determining a target line width and a target height according to the target substrate.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for printing an LED retaining wall of a display panel provided by the above methods, the method comprising: taking a printing task as a guide, performing preparation operation before printing, and scanning a target substrate through a measuring system of a printing device of an LED retaining wall of a display panel to obtain flatness data of the target substrate; the motion control system moves the target multi-needle module to the printing starting point of the target substrate, and based on the received flatness data, the printing receiving distance of each printing needle head in the target multi-needle module is adjusted by using the Z-axis controller; based on the preset air pressure parameter, the preset movement speed of the printing needle head and the target line width, the target multi-needle module is subjected to laminating printing on the upper surface of the target substrate on the target station, and the target LED retaining wall is generated by solidification under the condition that the printing height meets the target height range; the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the printing height is an accumulated layer height corresponding to the number of printing layers, and the printing task at least comprises the step of determining a target line width and a target height according to the target substrate.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on such understanding, the above technical solutions may be embodied in the form of software products, which may be stored in a storage medium readable by a control terminal, such as ROM/RAM, magnetic disk, optical disk, etc., and include instructions for enabling a control terminal (which may be a personal control terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (11)

1. A printing method of an LED retaining wall of a display panel is characterized by comprising the following steps:
taking a printing task as a guide, performing preparation operation before printing, and scanning a target substrate through a measuring system of printing equipment of an LED retaining wall of a display panel to obtain flatness data of the target substrate;
the motion control system moves the target multi-needle module to the printing starting point of the target substrate, and based on the received flatness data, the printing receiving distance of the target multi-needle module is adjusted by using a Z-axis controller;
based on preset air pressure parameters and target line widths, the target multi-pin module is subjected to laminating printing on the upper surface of the target substrate on a target station, and a target LED retaining wall is generated by solidification under the condition that the printing height meets a target height range;
the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-pin module comprises a first module and/or a second module, the printing height is an accumulated layer height corresponding to the number of printing layers, and the printing task at least comprises the step of determining a target line width and the target height according to the target substrate;
based on the received flatness data, the printing receiving distance of the target multi-needle module is adjusted by using a Z-axis controller, and the method comprises the following steps:
acquiring a vertical distance between each printing point of the target substrate and the target multi-needle module based on the flatness data and the target corresponding relation, and taking the vertical distance as an actual value of a printing receiving distance;
under the condition that the target multi-needle module is positioned at the printing point, adjusting the actual value of the printing receiving distance to be the target value of the printing receiving distance through the Z-axis controller;
wherein, the target values of the printing receiving distances corresponding to the printing points are the same; the target corresponding relation is the relative position relation between a sensor in the measuring system and the target multi-needle module;
the color of the target LED retaining wall is a gradient color, and the printing process of the target LED retaining wall comprises the following steps:
modulating the color of an initial printing material into white, and sequentially increasing the color saturation of the printing material in the process of printing layer by layer to form a gradient wall body;
the value range of the target height is 10-200 mu m;
the value range of the target line width is 10-100 mu m;
the viscosity of the printing material ranges from 400000cp to 800000 cp.
2. The method for printing on the LED retaining wall of the display panel according to claim 1, wherein the preparation operation before printing comprises:
after the printing material is filled into the needle cylinder, the printing needle head is arranged on the needle cylinder and is connected with the needle cylinder and the fluid control system;
controlling the motion control system through a control terminal to perform mechanical zeroing operation;
the printing material is matched with the width-height ratio formed by the printing material, the inner diameter parameter of the printing needle head is matched with the target line width, and the number of printing layers is set based on the width-height ratio of the target LED retaining wall, the target line width and the target height.
3. The method as claimed in claim 2, wherein the pre-printing is performed under predetermined air pressure parameters before the motion control system moves the target multi-pin module to the printing start point of the target substrate, and the adsorption device is controlled by the motion control system to leave the pre-printing area after the printing pins are discharged stably.
4. The method as claimed in claim 1, wherein the step of stacking and printing the target multi-pin module on the upper surface of the target substrate at the target station based on the predetermined air pressure parameter and the target line width, and curing the target LED retaining wall when the printing height meets the target height range comprises:
based on the preset air pressure parameter and the target line width, the first module carries out laminating printing on the upper surface of the target substrate on the first station, and a longitudinal LED retaining wall is generated under the condition that the printing height meets the target height;
based on the preset air pressure parameter and the target line width, the second module is used for performing stacked printing on the upper surface of the target substrate on the second station, and a transverse LED retaining wall is generated under the condition that the printing height meets the target height.
5. The method as claimed in claim 1, wherein the step of stacking and printing the target multi-pin module on the upper surface of the target substrate at the target station based on the predetermined air pressure parameter and the target line width, and curing the target LED retaining wall when the printing height meets the target height range comprises:
based on the preset air pressure parameter and the target line width, the target multi-pin module performs stacked printing on the upper surface of the target substrate on the first station or the second station, and generates a longitudinal LED retaining wall when the printing height meets the target height;
and rotating the first station or the second station by 90 degrees, performing stacked printing on the upper surface of the target substrate by the target multi-needle module, and generating a transverse LED retaining wall under the condition that the printing height accords with the target height.
6. A printing apparatus for implementing a printing method of the LED retaining wall of the display panel according to any one of claims 1 to 5, comprising:
the motion control system is connected with the control terminal and used for controlling the target LED retaining wall printed on the upper surface of the target substrate on the target station;
the adsorption device is connected with the motion control system and comprises a vacuum pump, a vacuum pump and a vacuum pump, wherein the vacuum pump is used for adsorbing the lower surface of the target substrate on a sucker;
the measuring system is connected with the control terminal and comprises a sensor and a sensor controller, wherein the sensor is used for measuring the flatness data of the target substrate;
the Z-axis controller is connected with the control terminal and is used for controlling the printing receiving distance between the target multi-needle module and the upper surface of the target substrate;
the target multi-needle module is connected with the Z-axis controller and comprises a printing needle head and a fluid control system, and the fluid control system is used for providing preset air pressure parameters for the printing needle head;
the target station is connected with the motion control system and used for accommodating the target substrate so that the target multi-needle module can perform target LED retaining wall laminated printing on the upper surface of the target substrate;
the target station comprises a first station and/or a second station, the target LED retaining wall comprises a transverse LED retaining wall and a longitudinal LED retaining wall, the target multi-needle module comprises a first module and/or a second module, the first module is matched with the first station, the second module is matched with the second station, and the target substrate comprises a PCB substrate or a glass substrate;
the color of the target LED retaining wall is a gradient color, and the printing process of the target LED retaining wall comprises the following steps:
modulating the color of an initial printing material into white, and sequentially increasing the color saturation of the printing material in the process of printing layer by layer to form a gradient wall body;
the value range of the target height is 10-200 mu m;
the value range of the target line width is 10-100 mu m;
the viscosity of the printing material ranges from 400000cp to 800000 cp.
7. The printing apparatus of claim 6, wherein the destination station further comprises:
the cleaning area is used for cleaning and storing the printing needle head;
and the preprinting area is used for preprinting under preset air pressure parameters until the printing needle head stably discharges materials, and the adsorption device is controlled by the motion control system to leave the preprinting area.
8. The apparatus of claim 6, wherein the motion control system is specifically configured to control the absorption device to move in an XY plane when the target station includes a first station and a second station, so that the first module prints the longitudinal LED retaining wall on the target substrate in the first station;
and sending a first motion instruction to the adsorption device, so that the adsorption device transfers the target substrate to the XY plane of the second station to move according to the first motion instruction, and the second module prints the transverse LED retaining wall on the target substrate in the second station.
9. The printing apparatus for the LED retaining wall of the display panel according to claim 6, wherein the motion control system is specifically configured to control the absorption device to move in an XY plane when the target station includes a first station or a second station, so that the target multi-pin module prints the longitudinal LED retaining wall on the target substrate in the target station;
and sending a second motion instruction to the target station, so that after the target station rotates by 90 degrees according to the second motion instruction, the adsorption device is driven to move in an XY plane, and the target multi-needle module prints the transverse LED retaining wall on the target substrate in the target station.
10. The LED retaining wall printing apparatus for display panels according to claim 8 or 9, wherein the Z-axis controller comprises one or more.
11. A non-transitory computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor implements a method for printing the LED retaining wall of the display panel according to any one of claims 1 to 5.
CN202210292190.3A 2022-03-03 2022-03-24 Printing equipment and method for LED retaining wall of display panel Active CN114379091B (en)

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CN202210292190.3A CN114379091B (en) 2022-03-24 2022-03-24 Printing equipment and method for LED retaining wall of display panel
PCT/CN2022/128177 WO2023165147A1 (en) 2022-03-03 2022-10-28 Printing apparatus and method for led dam of display panel
KR1020247016336A KR20240093728A (en) 2022-03-03 2022-10-28 Printing equipment and method of LED barriers for display panels
EP22912784.0A EP4261015A4 (en) 2022-03-03 2022-10-28 Printing apparatus and method for led dam of display panel
TW113105855A TW202421414A (en) 2022-03-03 2022-12-02 Printing apparatus and method for LED dam of display panel
TW111146371A TWI838997B (en) 2022-03-03 2022-12-02 Printing device and method for LED baffle of display panel

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