Display panel bright spot repairing equipment and display panel bright spot repairing method

Abstract

The invention discloses display panel bright spot repairing equipment and a display panel bright spot repairing method, and relates to the technical field of micro-display, and the display panel bright spot repairing equipment comprises an equipment main body, a laser transmitter and a first movement mechanism; the equipment body is provided with a machining face. The laser emitter is movably mounted on the equipment main body and emits laser towards the processing surface; the first movement mechanism comprises a first platform, a second platform and a plurality of telescopic shafts, the first platform and the second platform are arranged at intervals, the two ends of each telescopic shaft are rotationally connected to the first platform and the second platform correspondingly, the first platform is arranged on the machining face, and the second platform is used for containing a display panel; and the plurality of telescopic shafts drive the second platform to swing relative to the first platform during telescopic movement. According to the invention, the light emitted by the to-be-repaired sub-pixel is adjusted to coincide with the path of the laser emitted by the laser emitter, so that the problem that the laser may damage the adjacent normal sub-pixel in the prior art is solved, and the yield of products is improved.

Description

Technical Field

[0001] The present invention relates to the field of microdisplay technology, and particularly relates to a display panel bright point repair device and a repair method. Background Art

[0002] In the field of microdisplay, especially in near-eye display devices such as VR (Virtual Reality) and AR (Augmented Reality), the display device needs to be paired with an optical magnification system such as an optical engine to magnify the image in the micro-optical display panel and transmit it to the human eye. However, there is a phenomenon of uneven brightness display when the light emitted by the conventional display panel passes through the optical engine system. Therefore, the solution of the prior art is to respectively set lenses with different offset degrees above each sub-pixel in the display screen, so that the light emission directions of the light at different positions of the microdisplay screen match the light angles of the optical engine system.

[0003] Defects will inevitably occur during the production and manufacturing of the display panel. A relatively common defect of the existing display panel is the bright point defect, and the bright point defect will affect the uniformity of the display. For the bright point defect, it can be repaired by the way of laser damaging the bright point pixel.

[0004] However, due to the offset between the lens and the sub-pixel in the display panel applied to the microdisplay field, when the laser passes through the lens and enters the sub-pixel, the laser energy cannot be accurately focused on the bright point sub-pixel for pixel repair, and it may also damage the adjacent normal sub-pixels, affecting the yield of the product. Summary of the Invention

[0005] The main object of the present invention is to propose a display panel bright point repair device, aiming to solve the problems that when the existing display panel performs bright point repair, the laser cannot be accurately focused on the bright point sub-pixel and may damage the adjacent normal sub-pixels.

[0006] To achieve the above object, a display panel bright point repair device proposed by the present invention includes:

[0007] A device main body, the device main body is provided with a processing surface;

[0008] A laser emitter, the laser emitter is movably installed on the device main body and emits laser light toward the processing surface;

[0009] a first motion mechanism, the first motion mechanism comprising a first platform, a second platform and a plurality of telescopic shafts, the first platform and the second platform being arranged at an interval, the second platform being located above the first platform, two ends of each of the telescopic shafts being rotatably connected to the first platform and the second platform, the first platform being arranged on the processing surface, and the second platform being used for placing a display panel;

[0010] Wherein, the plurality of telescopic shafts are configured to drive the second platform to swing relative to the first platform during telescopic movement.

[0011] In one embodiment of the present invention, the display panel bright spot repairing device further comprises a second motion mechanism, the second motion mechanism is movably mounted on the processing surface, and the first motion mechanism is arranged on a side of the second motion mechanism away from the processing surface;

[0012] The second motion mechanism is configured to drive the first motion mechanism to move linearly after the second platform swings relative to the first platform, so as to focus the laser on the to-be-processed area of ​​the display panel.

[0013] In one embodiment of the present invention, the display panel bright spot repairing equipment also includes a driving mechanism, which drives the laser emitter to move in a vertical direction relative to the equipment body; the driving mechanism drives the second motion mechanism to move relative to the equipment body in a plane perpendicular to the moving direction of the laser emitter.

[0014] In one embodiment of the present invention, the display panel bright spot repairing device also includes an objective lens, which is movably mounted on the device body, with the light entrance of the objective lens facing the processing surface, and the objective lens is configured to detect the luminous brightness of each sub-pixel in the display panel when the first motion mechanism drives the display panel to swing.

[0015] The present invention further provides a display panel bright spot repair method, the display panel bright spot repair method is implemented by using any of the display panel repair devices described above, and the display panel bright spot repair method comprises the steps of:

[0016] placing the display panel on the second platform;

[0017] Establishing a first coordinate system with the center of the first platform as the origin;

[0018] When the display panel is lit, determining the initial coordinates of the sub-pixel to be repaired in the display panel in the first coordinate system;

[0019] Determining, according to the initial coordinates, first deflection information of the light of the sub-pixel to be repaired passing through the display panel relative to the vertical direction;

[0020] According to the first deflection information, controlling the multiple telescopic shafts to telescope, so as to drive the second platform to drive the display panel to swing relative to the first platform;

[0021] When the light of the sub-pixel to be repaired that passes through the display panel coincides with the laser emitted by the laser emitter, the laser emitter is controlled to emit the laser to destroy the sub-pixel to be repaired.

[0022] In one embodiment of the present invention, the step of determining, according to the initial coordinates, first deflection information of the light of the sub-pixel to be repaired passing through the display panel relative to the vertical direction comprises:

[0023] Provide objective lens;

[0024] Controlling the extension and retraction of the plurality of retractable shafts to drive the second platform to drive the display panel to swing relative to the first platform;

[0025] Controlling the objective lens to collect the brightness of the sub-pixel to be repaired when the display panel swings;

[0026] When the brightness of the sub-pixel to be repaired collected by the objective lens and transmitted through the display panel is the maximum, determine the first angle and first direction of the display panel deflected relative to the vertical direction, and use the opposite direction of the first direction and the first angle as the first deflection information of the sub-pixel to be repaired.

[0027] In one embodiment of the present invention, when the brightness of the light of the sub-pixel to be repaired transmitted through the display panel collected by the objective lens is the maximum, after determining the first angle and the first direction of the deflection of the display panel relative to the vertical direction, the step further includes:

[0028] Determining, according to the initial coordinates and the first deflection information of the sub-pixel to be repaired, a target coordinate of the sub-pixel to be repaired in the first coordinate system after the display panel is swung;

[0029] Acquire the light spot of the sub-pixel to be repaired on the surface of the display panel through the objective lens, and determine the light spot coordinates of the light spot in the first coordinate system;

[0030] Determining whether the abscissa and ordinate of the light spot coordinates are the same as the abscissa and ordinate of the target coordinates;

[0031] If not, continue to drive the second platform to drive the display panel to swing relative to the first platform, and the swinging direction is from the abscissa and ordinate of the light spot coordinate to the abscissa and ordinate of the target coordinate;

[0032] If so, use the opposite direction of the first direction and the first angle as the first deflection information.

[0033] In an embodiment of the present invention, after the step of using the opposite direction of the first direction and the first angle as the first deflection information, the following steps are further included:

[0034] Divide the light-emitting area of the display panel into multiple detection areas;

[0035] Determine the detection area where the sub-pixel to be repaired is located according to the initial coordinate of the sub-pixel to be repaired;

[0036] Use the first deflection information of the sub-pixel to be repaired as the first deflection information of each sub-pixel included in the detection area where the sub-pixel to be repaired is located;

[0037] When there are at least two sub-pixels to be repaired in the detection area where the sub-pixel to be repaired is located, drive the second platform to drive the display panel to swing relative to the first platform according to the first deflection information;

[0038] Control the laser emitter to emit laser to simultaneously destroy each sub-pixel to be repaired in the detection area where the sub-pixel to be repaired is located.

[0039] In an embodiment of the present invention, after the step of controlling the telescopic shafts to expand and contract to drive the second platform to drive the display panel to swing relative to the first platform, and before the step of controlling the laser emitter to emit laser, the following steps are further included:

[0040] Compare the initial coordinate and the target coordinate to determine the abscissa change value, ordinate change value, and vertical coordinate change value of the sub-pixel to be repaired from the initial coordinate to the target coordinate;

[0041] Control the first motion mechanism and / or the laser emitter to move according to the abscissa change value, the ordinate change value, and the vertical coordinate change value, so that the display panel and the laser emitter approach each other, and the laser emitted by the laser emitter is focused on the sub-pixel to be repaired.

[0042] In an embodiment of the present invention, the step of controlling the first motion mechanism and / or the laser emitter to move according to the abscissa change value, the ordinate change value, and the vertical coordinate change value so that the display panel and the laser emitter approach each other includes:

[0043] Provide a second motion mechanism, and the first motion mechanism is arranged on the second motion mechanism;

[0044] According to the abscissa change value and the ordinate change value, control the second motion mechanism to drive the first motion mechanism and the display panel to move horizontally;

[0045] According to the vertical coordinate change value, control the laser emitter to move vertically so that the laser emitted by the laser emitter is focused on the sub-pixel to be repaired.

[0046] The display panel bright point repair device proposed by the present invention includes a device main body, a laser emitter and a first motion mechanism. The device main body is provided with a processing surface. The laser emitter is movably installed on the device main body and emits laser light towards the processing surface. The first motion mechanism includes a first platform, a second platform and a plurality of telescopic shafts. The first platform and the second platform are arranged at intervals, and both ends of each telescopic shaft are respectively rotatably connected to the first platform and the second platform. The first platform is arranged on the processing surface, and the second platform is used to place the display panel. When repairing the bright point of the display panel, first confirm the light inclination angle emitted from the light-emitting surface of the sub-pixel to be repaired on the display panel, and then control the plurality of telescopic shafts to expand and contract according to this inclination angle, so that the second platform swings relative to the first platform, and then adjust the light emitted by the sub-pixel to be repaired to coincide with the laser path emitted by the laser emitter, so that the laser can accurately damage the sub-pixel to be repaired, effectively avoiding the problem that the laser may damage adjacent normal sub-pixels due to the offset between the lens and the sub-pixel in the prior art, thereby improving the product yield. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0048] Figure 1 It is the front view of the display panel bright point repair device provided by the present invention;

[0049] Figure 2 It is the left view of the display panel bright point repair device provided by the present invention;

[0050] Figure 3 It is the structural schematic diagram of the first motion mechanism in the display panel bright point repair device provided by the present invention;

[0051] Figure 4Schematic diagram before the first motion mechanism drives the display panel to swing in the display panel bright point repair device provided by the present invention;

[0052] Figure 5 Schematic diagram after the first motion mechanism drives the display panel to swing in the display panel bright point repair device provided by the present invention;

[0053] Figure 6 Schematic diagram of the light propagation of each sub-pixel in the display panel;

[0054] Figure 7 Flowchart of an embodiment of the display panel bright point repair method provided by the present invention;

[0055] Figure 8 For Figure 7 Flowchart in the step of determining the first deflection information of the light transmitted from the sub-pixel to be repaired through the display panel with respect to the vertical direction;

[0056] Figure 9 For Figure 7 Flowchart after the step of determining the first angle and the first direction of the display panel with respect to the vertical direction;

[0057] Figure 10 For Figure 8 Flowchart after the step of taking the opposite direction of the first direction and the first angle as the first deflection information;

[0058] Figure 11 For Figure 7 Flowchart after the step of driving the second platform to drive the display panel to swing relative to the first platform and before the step of controlling the laser emitter to emit laser;

[0059] Figure 12 For Figure 11 Flowchart in the step of controlling the movement of the first motion mechanism and / or the laser emitter according to the abscissa change value, the ordinate change value and the vertical coordinate change value.

[0060] Explanation of the reference numerals in the drawings:

[0061] 1. Display panel bright point repair device; 10. Device main body; 11. Processing surface; 20. First motion mechanism; 21. Second platform; 22. First platform; 23. Telescopic shaft; 30. Laser emitter; 40. Second motion mechanism; 50. Objective lens; 60. Display panel; 61. Sub-pixel to be repaired; 62. Microlens.

[0062] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0063] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0064] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0065] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0066] In the field of microdisplay, the display screen needs to cooperate with the optical engine system to project the image onto the human eye and form a clear image. However, after passing through the optical engine system, conventional microdisplay screens often exhibit serious brightness non-uniformity. To solve this problem, existing technical solutions usually adopt a non-uniform screen design by adjusting the light-emitting directions of different positions on the microdisplay screen to match the main light ray angles of the optical engine system. The key to this non-uniform screen design is that micro-lenses 62 with different degrees of offset are provided on the sub-pixels in the screen, thereby achieving uniform brightness distribution. As Figure 6 shown, due to the offset of the micro-lenses 62, the light rays emitted by the sub-pixels at different positions inside the display panel 60 undergo different degrees of refraction after passing through the light-emitting surface of the display panel 60. At the same time, the closer to the edge of the product, the greater the designed offset of the micro-lenses 62, resulting in more significant refraction of the light rays of the corresponding sub-pixels.

[0067] In addition, when performing pixel repair, controlling the deflection of the laser will increase the structural cost. At the same time, it is difficult to control the accuracy of laser deflection, and the repair effect cannot be guaranteed. Therefore, when performing bright point repair, the laser is usually perpendicular to the product surface. When the laser enters the display panel 60, it will also be refracted to varying degrees under the action of the microlens 62, resulting in the laser being unable to focus on the light-emitting layer of the sub-pixel along the expected path, or possibly damaging adjacent normal sub-pixels, affecting the product yield.

[0068] The present invention provides a display panel bright point repair device 1, aiming to solve the problem that the laser cannot be accurately focused on the sub-pixel 61 to be repaired due to the offset between the lens and the sub-pixel.

[0069] Combined with Figures 1 to 5 As shown, in an embodiment of the present invention, the display panel bright point repair device 1 includes a device main body 10, a laser emitter 30, and a first motion mechanism 20; the device main body 10 is provided with a processing surface 11; the laser emitter 30 is movably installed on the device main body 10 and emits laser light toward the processing surface 11; the first motion mechanism 20 includes a first platform 22, a second platform 21, and a plurality of telescopic shafts 23. The first platform 22 and the second platform 21 are spaced apart. Both ends of each telescopic shaft 23 are respectively rotatably connected to the first platform 22 and the second platform 21. The first platform 22 is disposed on the processing surface 11, and the second platform 21 is used to place the display panel 60; wherein, the plurality of telescopic shafts 23 are configured to drive the second platform 21 to swing relative to the first platform 22 during telescopic movement.

[0070] In this embodiment, according to the principle of reversibility of light paths, when the light emerging from the surface of the sub-pixel to be repaired on the display panel 60 is in a vertical state, then when the laser is incident on the display panel 60 in the vertical direction, it will be focused on the sub-pixel 61 to be repaired along the same path. Therefore, the display panel bright point repair device 1 utilizes the swing of the second platform 21 relative to the first platform 22 in the first motion mechanism 20 to dynamically adjust the rotation angle of the display panel 60, so that the laser emitted by the laser emitter 30 can accurately act on the target area, while avoiding damage to surrounding normal sub-pixels, thereby improving the repair efficiency and product quality and reducing the R & D and production costs.

[0071] Specifically, the device main body 10 serves as the support frame of the entire display panel bright point repair device 1, providing a stable working platform. To facilitate the installation and fixation of other components, the device main body 10 is provided with a processing surface 11, and the space above the processing surface 11 is used for installing the first motion mechanism 20, placing the display panel 60, and the laser propagation of the laser emitter 30.

[0072] The first motion mechanism 20 includes a first platform 22, a second platform 21, and a plurality of telescopic shafts 23. The telescopic shafts 23 at least include two nested sleeves. The two sleeves are moved in the axial direction through a sliding telescopic structure, a spiral telescopic structure, or a rack and pinion telescopic structure, thereby realizing telescoping. Specifically, the sliding telescopic structure realizes the linear telescoping of components through a slide rail or a guide rod. The slide rail and the guide rod are respectively arranged on the two sleeves. The two sleeves are slidably connected through the cooperation of the guide rod and the slide rail, and relatively slide under the drive of a driving member such as a motor or a cylinder; the spiral telescopic structure utilizes a spiral or thread structure, and realizes the relative movement of the two sleeves through the rotational cooperation of a screw rod and a thread, thereby adjusting the length of the telescopic shaft 23; the rack and pinion telescopic structure converts the rotational motion of a gear into the linear motion of a rack to realize the telescopic function. A motor is arranged inside the telescopic shaft 23. The motor drives the gear to rotate. The rotation of the gear meshes with the groove on the rack through the teeth, converts the rotational motion into the linear motion of the rack, and the rack then drives one sleeve to move relative to the other sleeve, thereby realizing the telescoping of the telescopic shaft 23.

[0073] The connection structure between the telescopic shaft 23 and the first platform 22 and the second platform 21 can be hinge connection, coupling connection, bearing connection, etc. When some of the telescopic shafts 23 make an elongation movement, the remaining telescopic shafts 23 make a contraction movement. At this time, rotations occur between each telescopic shaft 23 and the first platform 22 and the second platform 21, and drive the second platform 21 to swing relative to the first platform 22. The design of the plurality of telescopic shafts 23 enables the first motion mechanism 20 to have a high degree of freedom, so as to facilitate more precise rotational control of the display panel 60. Therefore, according to the tilt angle information of the light transmitted from the to-be-repaired sub-pixel 61 through the surface of the display panel 60 confirmed in advance, the deflection of the display panel 60 can be dynamically adjusted by the display panel 60 repair device, so as to ensure that the light transmitted from the to-be-repaired sub-pixel 61 through the surface of the display panel 60 is vertical, so that the laser emitted by the laser emitter 30 coincides with the light propagation path of the to-be-repaired sub-pixel 61.

[0074] Further, as Figures 3 to 5As shown, there are six telescopic shafts 23, and the six telescopic shafts 23 are all inclined between the first platform 22 and the second platform 21. At the same time, every two adjacent telescopic shafts 23 and the first platform 22 and the second platform 21 enclose a triangular telescopic support structure, thereby enhancing the overall stability of the first motion mechanism 20, reducing the shaking and vibration of the first motion mechanism 20 caused during the operation of the display panel bright spot repair device 1, and improving the operation accuracy and reliability. The inclined telescopic shafts 23 can disperse the acting force to different directions and components, avoiding excessive force in a single direction, thereby reducing the risk of equipment wear and damage and extending the service life. In addition, the size of the second platform 21 is set to be smaller than that of the first platform 22, thereby saving the space above the processing surface 11, improving the space utilization rate, and the larger-area first platform 22 can further improve the stability of the first motion mechanism 20 and the accuracy of the rotation control of the display panel 60.

[0075] Since the sub-pixels with bright spot defects will affect the overall display effect of the display panel 60, the laser emitted by the laser emitter 30 is focused on the sub-pixel 61 to be repaired to damage the light-emitting structure of the sub-pixel 61 to be repaired, thereby achieving the purpose of repair. As described above, the rotation of the display panel 60 can be realized through the first motion mechanism 20, so that the light transmitted from the sub-pixel 61 to be repaired on the surface of the display panel 60 changes from an inclined state to a vertical state. When the light transmitted from the sub-pixel 61 to be repaired on the surface of the display panel 60 is adjusted to the vertical state, at this time, the laser emitter 30 can be controlled to move horizontally, or the first motion mechanism 20 can be controlled to move horizontally, so as to realize the coincidence of the light transmitted from the sub-pixel 61 to be repaired on the surface of the display panel 60 and the laser emitted by the laser emitter 30. Then control the laser emitter 30 to turn on, and the laser is focused on the sub-pixel 61 to be repaired, and the repair of the sub-pixel with bright spot defects can be realized.

[0076] In practical applications, first, based on the offset of the microlens 62 relative to the sub-pixels set during the R & D and production of the display panel 60, the tilt angle and direction of the light rays transmitted from each sub-pixel through the surface of the display panel 60 can be calculated; or a light detection device can be used to actually measure the tilt angle and direction of the light rays emitted from the defective sub-pixel 61 on the surface of the display panel 60. Then, based on the obtained tilt angle and direction information, the control system of the display panel bright point repair device 1 controls the telescopic shafts 23 in the first motion mechanism 20 to perform telescopic motions respectively, so that the second platform 21 swings relative to the first platform 22 until the light rays transmitted from the defective sub-pixel 61 through the surface of the display panel 60 are vertical. Then, by controlling the first motion mechanism 20 or the laser emitter 30 to move in the horizontal direction, the light rays transmitted from the defective sub-pixel 61 through the display panel 60 are made to completely coincide with the laser path of the laser emitter 30, and finally the repair of the defective sub-pixel 61 is completed. Compared with traditional repair means, using the display panel 60 repair device of the present application to repair the defective sub-pixel 61 reduces the risk of laser accidentally damaging normal sub-pixels due to the offset between the microlens 62 and the sub-pixels, improves the accuracy of laser repair, and in this way, the present technical solution effectively improves the product yield and reduces the production cost.

[0077] Combined with Figure 1 and Figure 2 As shown in the figures, in an embodiment of the present invention, the display panel bright point repair device 1 further includes a second motion mechanism 40. The second motion mechanism 40 is movably installed on the processing surface 11, and the first motion mechanism 20 is disposed on the side of the second motion mechanism 40 away from the processing surface 11; wherein, the second motion mechanism 40 is configured to drive the first motion mechanism 20 to linearly move after the second platform 21 swings relative to the first platform 22, so that the laser is focused on the area to be processed of the display panel 60.

[0078] In this embodiment, the second motion mechanism 40 can be movably installed on the processing surface 11 in the horizontal direction, and the first motion mechanism 20 is located above the second motion mechanism 40, so that the first motion mechanism 20 can move along the horizontal and / or vertical directions with the second motion mechanism 40. This combination enables the defective display panel 60 to be flexibly adjusted in position within the laser action area of the laser emitter 30, and the repair of multiple scattered defective bright point sub-pixels on the display panel 60 can be achieved without frequently repositioning the display panel 60.

[0079] Combined with Figure 1 and Figure 2As shown, in an embodiment of the present invention, the display panel bright point repair device 1 further includes a driving mechanism, which drives the laser emitter 30 to move relative to the device main body 10 in the vertical direction; the driving mechanism drives the second motion mechanism 40 to move relative to the device main body 10 within a plane perpendicular to the moving direction of the laser emitter 30.

[0080] As can be seen from the above embodiment, when the first motion mechanism 20 drives the display panel 60 to rotate, the position of the original sub-pixel 61 to be repaired changes. At this time, the second motion mechanism 40 can drive the first motion mechanism 20 and the display panel 60 to move horizontally, so that the sub-pixel 61 to be repaired moves to the action position of the laser. Therefore, by setting the second motion mechanism 40, the laser emitter 30 can be set to be movable only in the vertical direction to adjust the focusing position of the laser, and be fixed on the device main body 10 in the horizontal direction, thereby simplifying the connection structure between the laser emitter 30 and the device main body 10 and reducing the complexity of the movement control of the laser emitter 30.

[0081] The driving mechanism can be structures such as a motor, a hydraulic motor or a cylinder. By controlling the driving mechanism through a control system to drive the vertical movement of the laser emitter 30 and the in-plane movement of the second motion mechanism 40, the effect of multi-axis collaborative work is achieved. Therefore, when dealing with the bright point defects of multiple points scattered on the display panel 60, according to the position information of each sub-pixel 61 to be repaired, the second motion mechanism 40 can be first controlled for horizontal positioning, and then the vertical movement of the laser emitter 30 can be relied on for precise focusing, ensuring the repair effect.

[0082] Combined Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, in an embodiment of the present invention, the display panel bright point repair device 1 further includes an objective lens 50. The objective lens 50 is movably mounted on the device main body 10, and the light incident port of the objective lens 50 faces the processing surface 11. The objective lens 50 is configured to detect the light emission brightness of each sub-pixel in the display panel 60 during the process of the first motion mechanism 20 driving the display panel 60 to swing.

[0083] In this embodiment, the objective lens 50 is mounted on the device main body 10, and its light incident port faces the processing surface 11, and can receive the light emitted from each sub-pixel of the display panel 60. The objective lens 50 is movably mounted on the device main body 10 so that the objective lens 50 can move freely within a certain range to cover the entire display area of the display panel 60. Through a high-sensitivity optical sensor, the objective lens 50 can real-time monitor and record the light emission brightness and position information of each sub-pixel, providing data support for subsequent repair.

[0084] The objective lens 50 is not only used for detecting the positions of the initial bright spot defective sub-pixels, but also for determining the deflection angle and direction of the light emitted from the sub-pixel 61 to be repaired through the surface of the display panel 60. When the control system controls the first motion mechanism 20 to adjust the swing angle of the display panel 60, the objective lens 50 synchronously collects the brightness information of the sub-pixel 61 to be repaired. By comparing the brightness values at different swing angles, the objective lens 50 can accurately determine the deflection angle and direction of the display panel 60 corresponding to the maximum brightness of the light emitted from the sub-pixel 61 to be repaired. The deflection angle and direction of the display panel 60 corresponding to the maximum brightness are also the actual deflection angle and direction of the light emitted from the sub-pixel 61 to be repaired through the surface of the display panel 60. This actual deflection angle information can be compared with the theoretical deflection angle information obtained during the R & D and design of the display panel 60, thereby improving the accuracy of controlling the coincidence of the laser path and the light-emitting path of the pixel to be repaired, and thus improving the success rate and accuracy of the repair.

[0085] The present invention also provides a method for repairing bright spots on a display panel. This repair method is implemented using the above-mentioned display panel 60 repair device. The specific structure of the display panel bright spot repair device 1 refers to the above-mentioned embodiments. Since this display panel bright spot repair method adopts all the technical solutions of all embodiments of the above-mentioned display panel bright spot repair device 1, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0086] Among them, in combination Figure 7 As shown, in an embodiment of the present invention, the method for repairing bright spots on a display panel includes the steps:

[0087] Place the display panel 60 on the second platform 21;

[0088] S100: Establish a first coordinate system with the center of the first platform 22 as the origin;

[0089] S200: In the state where the display panel 60 is lit, determine the initial coordinates of the sub-pixel 61 to be repaired in the display panel 60 in the first coordinate system;

[0090] S300: According to the initial coordinates, determine the first deflection information of the light emitted from the sub-pixel 61 to be repaired through the display panel 60 relative to the vertical direction;

[0091] S400: According to the first deflection information, control the telescopic movement of multiple telescopic shafts 23 to drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22;

[0092] S500: When the light emitted from the sub-pixel 61 to be repaired through the display panel 60 coincides with the laser emitted by the laser emitter 30, control the laser emitter 30 to emit laser to destroy the sub-pixel 61 to be repaired.

[0093] In this embodiment, the display panel 60 to be repaired is placed on the second platform 21, and a fixing device (such as a fixture or a suction cup) is used to fix the display panel 60 on the second platform 21 to ensure that it does not move during the operation.

[0094] During the process that the telescopic shaft 23 telescopically drives the second platform 21 to drive the display panel 60 to swing, the position of the first platform 22 remains relatively fixed. Therefore, a first coordinate system is established with the center of the first platform 22 as the origin, so as to accurately determine the position information of each sub-pixel in the display panel 60 before and after swinging and during the swinging process. Of course, any point on the first platform 22 can also be used as the coordinate origin of the first coordinate system.

[0095] After the display panel 60 is lit, the entire display panel 60 is scanned by the objective lens 50 or other high-precision optical sensors, and the luminous brightness distribution map of each sub-pixel is recorded, so as to accurately identify which sub-pixels have problems. Then the collected data is transmitted to the control system, and the sub-pixels with abnormal brightness are analyzed and screened through the built-in algorithm. For all the sub-pixels with bright spot defects detected, their spatial coordinates are recorded. It can be understood that the spatial coordinates here are actually the coordinates of the light spot presented on the surface of the display panel 60 in the first coordinate system when the light emitted by the sub-pixel passes through the surface of the display panel 60. During the design, research and development, and production of the display panel 60, the offset of the microlens 62 at different positions relative to the sub-pixel is known. Therefore, the initial coordinates of the sub-pixel with a bright spot defect can be calculated according to the spatial coordinates and the offset of the microlens 62 from the sub-pixel.

[0096] Theoretically, the tilt angle and direction of the light rays emitted from the light-emitting surface of the display panel 60 by sub-pixels at different positions can also be calculated according to the offset of the microlens 62 relative to the sub-pixel. Therefore, after the initial coordinates of the sub-pixel 61 to be repaired are determined, the data information provided by the front-end research and development can be screened according to the initial coordinates to obtain the first deflection information of the sub-pixel 61 to be repaired. In fact, the objective lens 50 can also be used to monitor the brightness change of the sub-pixel in real time, and then determine the first deflection information of the light emitted by it relative to the vertical direction. This step will be described in detail later and will not be elaborated here.

[0097] The first deflection information includes the emission angle and emission direction of the light rays emitted from the display panel 60 by the sub-pixel 61 to be repaired. According to the obtained first deflection information, the control system controls the telescopic shafts 23 in the second motion mechanism 40 to perform corresponding telescopic adjustments, so that the second platform 21 swings relative to the first platform 22 to ensure that the laser path coincides with the light-emitting path of the sub-pixel 61 to be repaired.

[0098] Then start the laser emitter 30 to begin the repair. Technicians need to set appropriate laser parameters (such as energy output, spot size, etc.) to ensure that each emission can effectively damage the light-emitting structure of the target pixel without affecting the surrounding area.

[0099] For the method for repairing bright spots on the display panel provided in this embodiment, compared with the traditional method, this application effectively solves the problem that the laser accidentally damages adjacent sub-pixels during the repair process caused by the offset of the microlens 62 relative to the sub-pixels, improving the consistency and success rate of the repair. In addition, this method of using the display panel 60 repair device for automatic control repair is applicable to the repair of bright spots in large-scale production, which helps to improve the overall efficiency of the production line and the product quality.

[0100] Combined with Figure 8 As shown in the figure, in an embodiment of the present invention, in the step of determining the first deflection information of the light emitted by the sub-pixel 61 to be repaired through the display panel 60 relative to the vertical direction according to the initial coordinates, it includes:

[0101] Provide an objective lens 50;

[0102] S310: Control the plurality of telescopic shafts 23 to expand and contract to drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22;

[0103] S320: Control the objective lens 50 to collect the brightness of the sub-pixel 61 to be repaired when the display panel 60 swings;

[0104] S330: When the brightness of the light emitted by the sub-pixel 61 to be repaired collected by the objective lens 50 is the maximum, determine the first angle and the first direction of the display panel 60 deflected relative to the vertical direction, and use the opposite direction of the first direction and the first angle as the first deflection information of the sub-pixel 61 to be repaired.

[0105] In this embodiment, the objective lens 50 adopts a high-precision optical sensor. First, control the first motion mechanism 20 to drive the display panel 60 to move so that the sub-pixel 61 to be repaired is located within the optical field of view of the objective lens 50. Then control the plurality of telescopic shafts 23 to expand and contract to drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22.

[0106] The control system records the measurement results of the brightness of the sub-pixel 61 to be repaired collected by the objective lens 50 during the deflection of the display panel 60, and plots a curve of the brightness varying with the angle and direction. By analyzing the brightness-angle-direction change curve, the deflection angle (first angle) and deflection direction (first direction) of the display panel 60 relative to the vertical direction when the sub-pixel 61 to be repaired is at the maximum brightness are found. Then, the first angle and the opposite direction of the first direction are set as the first deflection information. The calculated first deflection information is stored in the control system and used to guide subsequent repair operations.

[0107] The above method of detecting the change in sub-pixel brightness can calculate the first deflection information of the sub-pixel 61 to be repaired. Compared with the theoretical first deflection information of the sub-pixel obtained by screening R & D data, the method of actual measurement can reduce the errors that occur during the design and production of the display panel 60, thereby improving the success rate of repair.

[0108] Of course, a combination of theory and actual measurement can also be used. For example, based on the already determined theoretical first deflection information, the display panel 60 can be directionally controlled to deflect in a specific direction and angle. For example, when it is known theoretically that the light emitted from the sub-pixel 61 to be repaired on the surface of the display panel 60 deflects 30 degrees towards the due east direction, at this time, the first motion mechanism 20 is controlled to drive the display panel 60 to deflect towards the due west direction. During the deflection process, the objective lens 50 continuously collects the brightness change of the sub-pixel 61 to be repaired. At the same time, when the deflection angle of the display panel 60 towards the due west direction is near 30 degrees, the brightness acquisition frequency of the objective lens 50 for the sub-pixel 61 to be repaired is increased at this time, thereby improving the actual measurement efficiency and actual measurement accuracy of the first deflection information.

[0109] Combined Figure 9 As shown, in an embodiment of the present invention, after the step of determining the first angle and the first direction of the display panel 60 deflecting relative to the vertical direction when the brightness of the light transmitted through the display panel 60 by the objective lens 50 for the sub-pixel 61 to be repaired is the maximum, the following steps are further included:

[0110] S331: According to the initial coordinates and the first deflection information of the sub-pixel 61 to be repaired, determine the target coordinates of the sub-pixel 61 to be repaired in the first coordinate system after the display panel 60 swings;

[0111] S332: Obtain the light spot of the sub-pixel 61 to be repaired transmitted through the display panel 60 by the objective lens 50, and determine the light spot coordinates of the light spot in the first coordinate system;

[0112] S333: Determine whether the abscissa and ordinate of the light spot coordinates are the same as the abscissa and ordinate of the target coordinates;

[0113] S334: If not, continue to drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22, and the swinging direction is from the abscissa and ordinate of the light spot coordinate to the abscissa and ordinate of the target coordinate;

[0114] S335: If so, set the reverse direction of the first direction and the first angle as the first deflection information.

[0115] In this embodiment, when the microlens 62 disposed above the sub-pixel is offset relative to the sub-pixel, under the influence of the microlens 62, the angle between the light emitting direction of the light transmitted from the to-be-repaired sub-pixel 61 through the surface of the display panel 60 and the surface of the display panel 60 is an acute angle. At this time, the light spot center of the to-be-repaired sub-pixel 61 corresponding to the display area of the display panel 60 and the center of the light emitting layer of the to-be-repaired sub-pixel 61 are also offset in the vertical direction.

[0116] When the display panel 60 rotates until the light emitting direction of the light transmitted from the to-be-repaired sub-pixel 61 through the surface of the display panel 60 is in the vertical state, at this time, the projection of the light spot center of the to-be-repaired sub-pixel 61 corresponding to the display area of the display panel 60 in the vertical direction coincides with the center of the light emitting layer of the to-be-repaired sub-pixel 61.

[0117] Therefore, when the to-be-repaired sub-pixel 61 is at the maximum brightness, control the objective lens 50 to detect the light spot coordinates of the light emitted by the to-be-repaired sub-pixel 61 presented on the surface of the display panel 60. The objective lens 50 obtains a brightness distribution map through high-resolution imaging technology, and the control system calculates the light spot coordinates (X1, Y1, Z1). According to the initial coordinates of the to-be-repaired sub-pixel 61 determined in advance and the first deflection information, the target coordinates (X2, Y2, Z2) of the to-be-repaired sub-pixel 61 when the objective lens 50 collects the maximum brightness of the to-be-repaired sub-pixel 61 can be determined.

[0118] Theoretically, when the display panel 60 is swinging, as the light brightness of the to-be-repaired sub-pixel 61 collected by the objective lens 50 presented on the surface of the display panel 60 gradually increases, the target coordinates and the light spot coordinates will gradually approach in the horizontal direction, that is, when the to-be-repaired sub-pixel 61 is at the maximum brightness, X1≈X2, Y1≈Y2. Considering the small size of the sub-pixel itself and the measurement error of the device, in this embodiment, the judgment standard for whether the display panel 60 swings to the predetermined position is set as X1 = X2, Y1 = Y2. This coordinate judgment mechanism can be combined with the brightness change judgment mechanism. Through the dual judgment mechanism, the judgment accuracy of whether the light transmitted from the to-be-repaired sub-pixel 61 through the display panel 60 coincides with the light emitted by the laser emitter 30 can be further improved, thereby improving the repair success rate and reducing the risk of mis-damage.

[0119] Combined with Figure 10As shown, in an embodiment of the present invention, after the step of taking the reverse direction of the first direction and the first angle as the first deflection information, the following steps are further included:

[0120] S340: Divide the light-emitting area of the display panel 60 into multiple detection areas;

[0121] S350: Determine the detection area where the sub-pixel 61 to be repaired is located according to the initial coordinates of the sub-pixel 61 to be repaired;

[0122] S360: Take the first deflection information of the sub-pixel 61 to be repaired as the first deflection information of each sub-pixel included in the detection area where the sub-pixel 61 to be repaired is located;

[0123] S370: When there are at least two sub-pixels 61 to be repaired in the detection area where the sub-pixel 61 to be repaired is located, drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22 according to the first deflection information;

[0124] S380: Control the laser emitter 30 to emit laser to simultaneously destroy each sub-pixel 61 to be repaired in the detection area where the sub-pixel 61 to be repaired is located.

[0125] In this embodiment, the light-emitting area can be meshed, and it is set that every certain number of sub-pixel units are divided into a detection area. The detection area can be rectangular, triangular, trapezoidal, etc. The number of sub-pixels included in each detection area can be set according to actual needs. When the range of the detection area is small, the number of sub-pixels covered in the detection area is also small. At this time, the inclination angle and direction of the light emitted from each sub-pixel in this detection area relative to the vertical direction are closer. When the range of the detection area is large, the number of sub-pixels covered in the detection area is also large. At this time, the deviation of the inclination angle and direction of the light emitted from all sub-pixels in this detection area relative to the vertical direction is also larger.

[0126] When the first deflection information of a sub-pixel 61 to be repaired in a certain detection area is determined, the control system applies this first deflection information to match each sub-pixel in this detection area. That is, if there are other sub-pixels 61 to be repaired in this detection area, then there is no need to determine the deflection angle information of other sub-pixels 61 to be repaired, and the already determined first deflection information can be directly used for bright point repair. Therefore, when a certain detection area contains two or more sub-pixels 61 to be repaired, only the first deflection information of a certain sub-pixel 61 to be repaired needs to be determined, and then after the display panel 60 swings to the set position, the laser emitter 30 is turned on to simultaneously destroy all sub-pixels 61 to be repaired in this detection area. This method of detecting area division greatly improves the efficiency of bright point repair, especially in large-scale panel repair, which can greatly save time cost and labor cost.

[0127] Combine Figure 11 As shown, in an embodiment of the present invention, after the step of controlling the telescopic movement of a plurality of telescopic shafts 23 to drive the second platform 21 to drive the display panel 60 to swing relative to the first platform 22, before the step of controlling the laser emitter 30 to emit laser, the following steps are further included:

[0128] S510: Compare the initial coordinates and the target coordinates, and determine the horizontal coordinate change value, the vertical coordinate change value, and the vertical coordinate change value of the sub-pixel 61 to be repaired from the initial coordinates to the target coordinates;

[0129] S520: Control the movement of the first motion mechanism 20 and / or the laser emitter 30 according to the horizontal coordinate change value, the vertical coordinate change value, and the vertical coordinate change value, so that the display panel 60 and the laser emitter 30 are close to each other, and the laser emitted by the laser emitter 30 is focused on the sub-pixel 61 to be repaired.

[0130] In this embodiment, when the light transmitted by the sub-pixel 61 to be repaired through the display panel 60 faces the vertical direction as the display panel 60 swings, the control system analyzes the obtained initial coordinates and target coordinates, and through calculation, the coordinate change values of the sub-pixel 61 to be repaired along the X-axis, Y-axis, and Z-axis before and after swinging in the first coordinate system can be obtained. According to the coordinate change values, the control system can accurately control the movement of at least one of the first motion mechanism 20 and the laser emitter 30 to ensure that the laser emitted by the laser emitter 30 can accurately focus on the target.

[0131] Combine Figure 12 As shown, in an embodiment of the present invention, in the step of controlling the movement of the first motion mechanism 20 and / or the laser emitter 30 according to the horizontal coordinate change value, the vertical coordinate change value, and the vertical coordinate change value, so that the display panel 60 and the laser emitter 30 are close to each other, the following steps are included:

[0132] Provide a second motion mechanism 40, and the first motion mechanism 20 is arranged on the second motion mechanism 40;

[0133] S530: Control the second motion mechanism 40 to drive the first motion mechanism 20 and the display panel 60 to move horizontally according to the horizontal coordinate change value and the vertical coordinate change value;

[0134] S540: Control the laser emitter 30 to move vertically according to the vertical coordinate change value, so that the laser emitted by the laser emitter 30 is focused on the sub-pixel 61 to be repaired.

[0135] In this embodiment, the second motion mechanism 40 is movably installed on the processing surface 11 to ensure that it can freely slide on the horizontal plane. The first motion mechanism 20 is installed on the second motion mechanism 40 and moves with it.

[0136] By comparing the initial coordinates and the target coordinates, the variation amounts of the sub-pixels 61 to be repaired in the X-axis and Y-axis directions in the first coordinate system after the display panel 60 deflects are obtained. Then, the second motion mechanism 40 is controlled to drive the first motion mechanism 20 and the display panel 60 to move the same variation amounts in the opposite directions along the X-axis and Y-axis respectively, so as to ensure that the sub-pixels 61 to be repaired can accurately enter the laser action range of the laser emitter 30.

[0137] Then, the laser emitter 30 is controlled to move in the vertical direction so that the laser is focused on the sub-pixels 61 to be repaired, ensuring that the laser can accurately hit the target and avoiding the laser from damaging the structures above or below the sub-pixels 61 to be repaired.

[0138] Since the laser emitter 30 only moves in the vertical direction, the laser emitter 30 can be set to be relatively fixed with respect to the device main body 10 in the horizontal direction. Furthermore, the complexity of the structure of the laser emitter 30 and the connection structure between the laser emitter 30 and the device main body 10 is reduced, and the device cost is lowered.

[0139] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A display panel bright point repair device, characterized in that, The display panel bright spot repairing device comprises: An equipment body, wherein the equipment body is provided with a processing surface; A laser emitter, which is movably mounted on the device body and emits laser light toward the processing surface; a first motion mechanism, the first motion mechanism comprising a first platform, a second platform and a plurality of telescopic shafts, the first platform and the second platform being arranged at an interval, the second platform being located above the first platform, two ends of each of the telescopic shafts being rotatably connected to the first platform and the second platform, the first platform being arranged on the processing surface, and the second platform being used for placing a display panel; Wherein, the plurality of telescopic shafts are configured to drive the second platform to swing relative to the first platform during telescopic movement.

2. The display panel bright point repair device according to claim 1, characterized in that, The display panel bright spot repairing device further comprises a second motion mechanism, the second motion mechanism is movably mounted on the processing surface, and the first motion mechanism is arranged on a side of the second motion mechanism away from the processing surface; The second motion mechanism is configured to drive the first motion mechanism to move linearly after the second platform swings relative to the first platform, so as to focus the laser on the to-be-processed area of ​​the display panel.

3. The display panel bright point repair device according to claim 2, characterized in that, The display panel bright spot repairing device also includes a driving mechanism, which drives the laser emitter to move in a vertical direction relative to the device body; the driving mechanism drives the second motion mechanism to move in a plane perpendicular to the moving direction of the laser emitter relative to the device body.

4. The display panel bright point repair device according to any one of claims 1 to 3, characterized in that, The display panel bright spot repairing device also includes an objective lens, which is movably mounted on the device body, with a light entrance of the objective lens facing the processing surface. The objective lens is configured to detect the luminous brightness of each sub-pixel in the display panel when the first motion mechanism drives the display panel to swing.

5. A method for repairing bright spots on a display panel, characterized in that, The display panel bright spot repair method is implemented by using the display panel repair device according to any one of claims 1 to 4, and the display panel bright spot repair method comprises the steps of: placing the display panel on the second platform; Establishing a first coordinate system with the center of the first platform as the origin; When the display panel is lit, determining the initial coordinates of the sub-pixel to be repaired in the display panel in the first coordinate system; Determining, according to the initial coordinates, first deflection information of the light of the sub-pixel to be repaired passing through the display panel relative to the vertical direction; According to the first deflection information, controlling the multiple telescopic shafts to telescope, so as to drive the second platform to drive the display panel to swing relative to the first platform; When the light of the sub-pixel to be repaired that passes through the display panel coincides with the laser emitted by the laser emitter, the laser emitter is controlled to emit the laser to destroy the sub-pixel to be repaired.

6. The method for repairing bright dots of a display panel according to claim 5, wherein, The step of determining, according to the initial coordinates, first deflection information of the light of the sub-pixel to be repaired passing through the display panel relative to the vertical direction comprises: Provide objective lens; Controlling the extension and retraction of the plurality of retractable shafts to drive the second platform to drive the display panel to swing relative to the first platform; Control the objective lens to collect the brightness of the sub-pixel to be repaired when the display panel swings; When the brightness of the light transmitted by the sub-pixel to be repaired collected by the objective lens through the display panel is the maximum, determine the first angle and the first direction of the display panel deflected relative to the vertical direction, and use the reverse direction of the first direction and the first angle as the first deflection information of the sub-pixel to be repaired.

7. The method for repairing bright spots on a display panel according to claim 6, characterized in that, After the step of determining the first angle and the first direction of the display panel deflected relative to the vertical direction when the brightness of the light transmitted by the sub-pixel to be repaired collected by the objective lens through the display panel is the maximum, the following steps are further included: According to the initial coordinates and the first deflection information of the sub-pixel to be repaired, determine the target coordinates of the sub-pixel to be repaired in the first coordinate system after the display panel swings; Obtain the light spot presented by the sub-pixel to be repaired on the surface of the display panel through the objective lens, and determine the light spot coordinates of the light spot in the first coordinate system; Judge whether the abscissa and ordinate of the light spot coordinates are the same as the abscissa and ordinate of the target coordinates; If not, continue to drive the second platform to drive the display panel to swing relative to the first platform, and the swinging direction is the direction from the abscissa and ordinate of the light spot coordinates to the abscissa and ordinate of the target coordinates; If so, use the reverse direction of the first direction and the first angle as the first deflection information.

8. The method for repairing bright spots on a display panel according to claim 6, characterized in that, After the step of using the reverse direction of the first direction and the first angle as the first deflection information, the following steps are further included: Divide the light-emitting area of the display panel into multiple detection areas; Determine the detection area where the sub-pixel to be repaired is located according to the initial coordinates of the sub-pixel to be repaired; Use the first deflection information of the sub-pixel to be repaired as the first deflection information of each sub-pixel included in the detection area where the sub-pixel to be repaired is located; When there are at least two sub-pixels to be repaired in the detection area where the sub-pixel to be repaired is located, drive the second platform to drive the display panel to swing relative to the first platform according to the first deflection information; Control the laser emitter to emit laser to simultaneously destroy each sub-pixel to be repaired in the detection area where the sub-pixel to be repaired is located.

9. The method for repairing bright dots of a display panel according to any one of claims 7 to 8, characterized in that, Before the step of controlling the laser emitter to emit laser after the step of controlling the telescopic shafts to expand and contract to drive the second platform to drive the display panel to swing relative to the first platform, the following steps are further included: Compare the initial coordinates and the target coordinates, and determine the abscissa change value, the ordinate change value and the vertical coordinate change value of the sub-pixel to be repaired from the initial coordinates to the target coordinates; Control the first motion mechanism and / or the laser emitter to move according to the abscissa change value, the ordinate change value and the vertical coordinate change value, so that the display panel and the laser emitter are close to each other, and the laser emitted by the laser emitter is focused on the sub-pixel to be repaired.

10. The method for repairing bright spots on a display panel according to claim 9, wherein, In the step of controlling the movement of the first movement mechanism and / or the laser emitter according to the abscissa change value, the ordinate change value, and the vertical coordinate change value, so that the display panel and the laser emitter approach each other, it includes: Providing a second movement mechanism, and the first movement mechanism is disposed on the second movement mechanism; According to the abscissa change value and the ordinate change value, controlling the second movement mechanism to drive the first movement mechanism and the display panel to move in the horizontal direction; According to the vertical coordinate change value, controlling the laser emitter to move in the vertical direction so that the laser emitted by the laser emitter is focused on the sub-pixel to be repaired.

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