Laser repairing system of Micro-LED display driving circuit
By using laser repair systems with laser processing units and liquid supply units in the Micro-LED display driving lines, the problems of short circuit and circuit breaker repair are solved, efficient and accurate repair results are achieved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421198349.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-05-29
AI Technical Summary
Micro-LED display driver lines are prone to poor problems such as short circuits and circuit breakers in mass production, and it is difficult for the existing technology to repair them efficiently and accurately.
A laser repair system composed of a laser processing unit and a liquid supply unit is used to realize short-circuit and circuit breaking repair of the drive line of the Micro-LED display through the optical path design of the first and second lasers, combined with visual detection equipment and a rotating stage.
It realizes efficient and accurate repair of short circuits and circuit breakers of Micro-LED display driver lines, with high position accuracy and compatible with line repairs on the front, side and back, improving production efficiency and product quality.
Smart Images
Figure CN222981929U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display processing, in particular to a laser repair system for a driving circuit of a Micro-LED display. Background Art
[0002] In recent years, a new type of display - Micro LED display has emerged in the display technology field. The specific solution is to use a super-high-density micro-LED array as a light-emitting panel, combined with a complex display driving circuit, to form a display panel that can individually control each micro-LED. Compared with traditional LCD and OLED display panels, the Micro LED display panel has higher luminous efficiency, longer lifespan, and higher brightness. At the same time, it has the advantages of being thin, charge-saving, and suitable for all-weather use, and is the main research and development direction of the next-generation display panel.
[0003] There are currently many problems with Micro LED display technology. For example, the number of micro-LED arrays is huge and cannot be manufactured by traditional SMT methods due to efficiency issues. In addition, controlling a large number of micro-LED beads requires the use of CMOS integrated circuit technology to manufacture the display driving circuit. The current mainstream method is to use glass as a substrate and use multiple exposure methods to manufacture the driving circuits on the front and back respectively. Then, a metal conductive film is deposited on the sidewalls of the glass by evaporation. The film layer extends from the sidewalls of the glass to the driving circuits on the front and back surfaces of the glass. Then, laser dry etching technology is used to etch the metal films on the sidewalls, front, and back of the glass, so that the driving circuit on the front is connected to the driving circuit on the back through the wires on the sidewalls. In mass production, there will definitely be shorts and open circuits in individual circuits, and at this time, a micro-circuit repair device is required for repair processing.
[0004] In view of the above defects, the designer actively conducts research and innovation to create a laser repair system for a driving circuit of a Micro-LED display, making it more valuable in the industry. Content of the Utility Model
[0005] To solve any of the above technical problems, the purpose of the utility model is to provide a laser repair system for a driving circuit of a Micro-LED display.
[0006] To achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A laser repair system for a driving circuit of a Micro-LED display includes a laser processing unit and a liquid supply unit. The liquid supply unit includes a liquid supply pipe connected to an external liquid supply controller, and a nozzle for spraying and treating the glass is installed on the liquid supply pipe;
[0008] The laser processing unit includes a first laser processing component and a second laser processing component;
[0009] The first laser processing component includes a first laser. The laser beam emitted by the first laser sequentially passes through a first reflector, a second reflector, a galvanometer scanner, a first tube lens, and a third reflector and then enters the objective lens;
[0010] The second laser processing component includes a second laser. The laser beam emitted by the second laser sequentially passes through a fourth reflector, a slit module, a second tube lens, a fifth reflector, a sixth reflector, and a third reflector and then enters the objective lens.
[0011] As a further improvement of the present utility model, a first shutter, a beam expander, a first half-wave plate, and a first polarization beam splitter are sequentially arranged between the first laser and the first reflector toward the side away from the first laser.
[0012] As a further improvement of the present utility model, a second shutter, a second half-wave plate, and a second polarization beam splitter are sequentially arranged between the second laser and the fourth reflector toward the side away from the second laser.
[0013] As a further improvement of the present utility model, a first vision detection device is further arranged on one side above the objective lens, and a second vision detection device is further arranged on one side above the nozzle.
[0014] As a further improvement of the present utility model, both the first vision detection device and the second vision detection device are CCD cameras.
[0015] As a further improvement of the present utility model, the number of objective lenses is several, and the several objective lenses are all installed side by side on an objective lens switching motion module.
[0016] As a further improvement of the present utility model, the glass is installed on a rotatable stage.
[0017] As a further improvement of the present utility model, a stage base is arranged below the stage. The left and right sides of the stage are respectively rotatably connected to the tops of the vertical rods installed on the stage base. A stage driving linear module is installed on the stage base. The stage driving linear module can drive the driving motion plate above to move in the front-rear direction. The driving motion plate is connected to the stage above through a hinge frame.
[0018] By means of the above solution, the present utility model has at least the following advantages:
[0019] The present utility model can repair both short circuits and open circuits with one device, and has high position accuracy;
[0020] For the repair of broken wires, the present utility model proposes a new processing flow to achieve the repair of conductive wire breaks at the 10um level.
[0021] The rotatable processing stage of the present utility model can simultaneously accommodate the repair and processing of circuits on the front, side, and back.
[0022] The above description is only an overview of the technical solution of the present utility model. In order to better understand the technical means of the present utility model and implement it in accordance with the content of the description, the following provides a detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings. Brief Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0024] Figure 1 is a schematic structural diagram of the laser processing unit of the present utility model;
[0025] Figure 2 is a schematic structural diagram of the liquid supply unit of the present utility model;
[0026] Figure 3 is a schematic structural diagram of the stage for carrying glass of the present utility model;
[0027] Figure 4 is a schematic diagram before short circuit repair;
[0028] Figure 5 is a schematic diagram after short circuit repair;
[0029] Figure 6 is a schematic diagram before open circuit repair;
[0030] Figure 7 is for Figure 6 a schematic diagram after spraying silver slurry droplets to the designated position and curing with the second laser;
[0031] Figure 8 is for Figure 7 a schematic diagram after removing the excess part with the first laser.
[0032] Among them, the meanings of the reference numerals in the drawings are as follows.
[0033] The first laser 1, the first shutter 2, the beam expander 3, the first half-wave plate 4, the first polarization beam splitter 5, the first mirror 6, the second mirror 7, the galvanometer scanner 8, the first vision detection device 9, the first tube lens 10, the third mirror 11, the objective lens switching motion module 12, the objective lens 13, the glass 14, the second laser 15, the second shutter 16, the second half-wave plate 17, the second polarization beam splitter 18, the fourth mirror 19, the slit module 20, the second tube lens 21, the fifth mirror 22, the sixth mirror 23, the liquid supply pipe 24, the nozzle 25, the second vision detection device 26, the stage base 27, the stage driving linear module 28, the driving motion plate 29, the articulated frame 30, the vertical rod 31, and the stage 32. Detailed implementation manners
[0034] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0035] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.
[0036] As Figures 1 to 8 shown, a laser repair system for a driving circuit of a Micro-LED display includes a laser processing unit and a liquid supply unit.
[0037] The liquid supply unit includes a liquid supply pipe 24 connected to an external liquid supply controller, and a nozzle 25 for spraying and treating the glass 14 is installed on the liquid supply pipe 24.
[0038] The laser processing unit includes a first laser processing component and a second laser processing component:
[0039] The first laser processing component includes a first laser 1. The laser beam emitted by the first laser 1 sequentially passes through a first reflector 6, a second reflector 7, a galvanometer scanner 8, a first tube lens 10, and a third reflector 11 and then enters an objective lens 13. Between the first laser 1 and the first reflector 6, a first shutter 2, a beam expander 3, a first half-wave plate 4, and a first polarization beam splitter 5 are sequentially arranged toward the side away from the first laser 1.
[0040] The second laser processing component includes a second laser 15. The laser beam emitted by the second laser 15 sequentially passes through a fourth reflector 19, a slit module 20, a second tube lens 21, a fifth reflector 22, a sixth reflector 23, and a third reflector 11 and then enters the objective lens 13. Between the second laser 15 and the fourth reflector 19, a second shutter 16, a second half-wave plate 17, and a second polarization beam splitter 18 are sequentially arranged toward the side away from the second laser 15.
[0041] A first vision detection device 9 is further arranged on one side above the objective lens 13, and a second vision detection device 26 is further arranged on one side above the nozzle 25. Both the first vision detection device 9 and the second vision detection device 26 are CCD cameras.
[0042] Among them, the number of the objective lenses 13 is several, and the several objective lenses 13 are all installed side by side on an objective lens switching motion module 12.
[0043] The glass 14 is installed on a rotatable stage 32. A stage base 27 is arranged below the stage 32. The left and right sides of the stage 32 are respectively rotationally connected to the tops of vertical rods 31 installed on the stage base 27. A stage driving linear module 28 is installed on the stage base 27. The stage driving linear module 28 can drive the upper driving motion plate 29 to move in the front-rear direction. The driving motion plate 29 is connected to the upper stage 32 through a hinge frame 30.
[0044] In this device, there is a double-laser optical path. The first laser 1 enters the objective lens 13 through the galvanometer scanner optical path for removal processing, and the processing accuracy can reach 1 μm. At the same time, the first vision detection device 9 also observes coaxially through the objective lens 13 to achieve precise positioning during processing, real-time observation, and confirmation of the processing effect. The second laser 15 enters the objective lens 13 through the slit module 20 for laser curing processing. The silver paste nozzle 25 sprays silver paste droplets to a specified position at a fixed time and in a fixed quantity according to requirements under the control of a liquid supply controller. The second vision detection device 26 can observe this process in real time. After covering the silver paste droplets at the wire break position, the curing laser of the second laser 15 is used for curing to form a new conductive line to connect the two ends of the disconnected line. Finally, the laser of the first laser 1 is used to remove the redundant deposited line area, and finally the repair process of the wire break is completed. For the repair of short-circuit defects, the galvanometer scanner optical path of the first laser 1 is directly used to remove the line at the short-circuit location.
[0045] With a rotatable stage, repair processing can be achieved for the front, back, and side surfaces of the product.
[0046] The utility model can efficiently and accurately repair short circuits and open circuits on the front and side conductors of the Micro-LED drive circuit. The main features are as follows:
[0047] The coaxial laser processing system can accurately locate and remove excess circuit materials, achieve the repair of short circuit parts, and remove excess circuits during the repair of open circuits, ensuring the consistency of the repaired line width;
[0048] The silver paste nozzle 25 can spray a controllable volume and number of silver paste droplets to a specified position;
[0049] The curing laser also passes through the coaxial imaging system to achieve the curing of the liquid silver paste;
[0050] The rotatable processing stage can be compatible with the side circuits for repair processing.
[0051] The utility model can simultaneously achieve the repair of short circuits and open circuits with high position accuracy on one device; for the repair of open circuits, a new processing flow is proposed to achieve the repair of conductive circuit open circuits in the order of 10um; the rotatable processing stage can be compatible with the front, side, and back circuits for repair processing at the same time.
[0052] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0053] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0054] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. It should be pointed out that for those of ordinary skill in the technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.
Claims
1. A laser repair system for a Micro-LED display drive circuit, comprising a laser processing unit and a liquid supply unit, wherein the liquid supply unit comprises a liquid supply pipe (24) connected to an external liquid supply controller, and a nozzle (25) for spraying glass (14) is installed on the liquid supply pipe (24); Features: The laser processing unit includes a first laser processing component and a second laser processing component; The first laser processing component comprises a first laser (1), wherein a laser beam emitted by the first laser (1) passes through a first reflector (6), a second reflector (7), a galvanometer (8), a first tube mirror (10) and a third reflector (11) in sequence and then enters an objective lens (13); The second laser processing assembly comprises a second laser (15), and a laser beam emitted by the second laser (15) passes through a fourth reflector (19), a slit module (20), a second tube mirror (21), a fifth reflector (22), a sixth reflector (23) and a third reflector (11) in sequence before entering an objective lens (13).
2. The laser repair system for the Micro-LED display driving circuit according to claim 1, characterized in that: A first optical gate (2), a beam expander (3), a first half-wave plate (4) and a first polarization beam splitter (5) are arranged in sequence between the first laser (1) and the first reflector (6) on the side away from the first laser (1).
3. The laser repair system for a Micro-LED display driving circuit according to claim 1, characterized in that: A second optical shutter (16), a second half-wave plate (17) and a second polarization beam splitter (18) are arranged in sequence between the second laser (15) and the fourth reflector (19) on the side away from the second laser (15).
4. The laser repair system for a Micro-LED display driving circuit according to claim 1, characterized in that: A first visual inspection device (9) is also provided on one side above the objective lens (13), and a second visual inspection device (26) is also provided on one side above the nozzle (25).
5. The laser repair system for the Micro-LED display driving circuit according to claim 4, characterized in that: The first visual inspection device (9) and the second visual inspection device (26) are both CCD cameras.
6. The laser repair system for a Micro-LED display driving circuit according to claim 1, characterized in that: The number of the objective lenses (13) is several, and the several objective lenses (13) are all mounted in parallel on the objective lens switching motion module (12).
7. The laser repair system for a Micro-LED display driving circuit according to claim 1, characterized in that: The glass (14) is mounted on a rotatable carrier (32).
8. The laser repair system for a Micro-LED display driving circuit according to claim 7, characterized in that: A platform base (27) is arranged below the platform (32), and the left and right sides of the platform (32) are rotatably connected to the top of a vertical rod (31) installed on the platform base (27), and a platform driving linear module (28) is installed on the platform base (27). The platform driving linear module (28) can drive the upper driving moving plate (29) to move in the front and rear directions, and the driving moving plate (29) is connected to the upper platform (32) through a hinge frame (30).