Laser etching device and processing method for peripheral leads of flexible display screen

Abstract

The present invention discloses a laser etching device, a processing method and a flexible display screen applied to the peripheral leads of a large-size (86 inches or above) flexible display screen, wherein the laser etching device comprises an optical platform, a one-dimensional moving mechanism, a CCD camera assembly and a laser galvanometer assembly. The optical platform provides a horizontal work surface, and the horizontal work surface comprises a small area of ​​precision motion region, in which a vacuum adsorption stage is provided. The one-dimensional moving mechanism is arranged in the precision motion region, and acts on the CCD camera assembly and the laser galvanometer assembly. The CCD camera assembly and the laser galvanometer assembly are respectively used to identify and locate the target, determine the offset and tilt angle of the area to be etched of the flexible display screen, and adjust their own position during the process of etching the area to be etched of the flexible display screen according to the identified offset and tilt angle. The laser etching device for the peripheral leads of the flexible display screen of the present invention has the advantages of low cost, high precision, high reliability and high efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of printed electronics and flat-panel optoelectronic devices, and in particular to a laser etching device and a processing method for peripheral leads of a flexible display screen, and a flexible display screen. Background Art

[0002] Take the widely used flat panel display as an example. It is generally composed of multiple layers of optical or optoelectronic devices. The substrate of these devices is transparent materials such as glass or PET, with functional areas in the middle and leads on the periphery. The central functional area can be liquid crystal display pixels, backlight arrays, capacitive or resistive touch unit arrays, etc. The central functional area is connected to the external power supply and subsequent processing circuits through peripheral leads. Typical technical requirements for leads include: good conductivity, thin thickness, narrow line width, and physical performance requirements such as anti-aging and anti-bending.

[0003] Screen printing is an important method for making peripheral leads. The most common conductive material used for printing is silver paste. This method has many advantages, such as low cost, high efficiency, simple process, high reliability, and environmental friendliness. Sometimes, due to differences in production processes and modular design, the central functional area and the peripheral lead area are often completed in different processes. The screen printing method is not easy to damage and pollute the central functional area, which is also one of its advantages.

[0004] The accuracy of screen-printed leads is affected by factors such as screen mesh size, wire diameter, slurry particle size, and slurry viscosity. It is usually difficult to achieve accurate production of high-density narrow lines below 40um. This problem is particularly serious for large-size flat panel devices. Taking large-size display panels as an example, the number of display units and touch units is huge, and the number of leads is greatly increased compared to small-size panels. With the trend of narrower and narrower display bezel design, the width of the leads must also be narrowed, and the density will increase sharply. Against the backdrop of the continuous maturity of flat-panel display technology and consumption upgrades, the proportion of large-size panels in the overall panel products will gradually increase. Solving the above problems is obviously of great commercial value.

[0005] To this end, the industry has introduced laser etching technology as a supplement. The specific solution is to screen print thick lines, while high-density lines and fine lines are generated by laser etching, and their line width and line spacing can be less than 20um. The mainstream means of light field control for laser etching is the galvanometer. At present, this method of screen printing + laser etching has been widely used in various fields such as flat panel displays and solar cells. However, for the production of leads for large-size products, it still faces the problems of high cost and limited efficiency. The detailed analysis is as follows:

[0006] The processing of large-size panels usually requires a large-size motion platform. Taking the panel of an 86-inch TV as an example, the X and Y direction motion ranges of its lead processing are about 2300mm and 1250mm. In order to save space and facilitate fixation during product processing, a dynamic gantry double-side drive structure is usually used, such as Figure 1 shown.

[0007] The galvanometer processing head 1 is installed on the beam axis 2 and is responsible for the movement in the first direction, which is the X-axis; the beam axis 2 is synchronously driven by the motors 3 on both sides of the first direction and is responsible for the movement in the second direction, which is the Y-axis. The product is fixed on the table and does not move. The typical processing field of the galvanometer processing head 1 is about 80×80mm, and the focal size of the laser focus is about 3~30um. Typically, the motion platform drives the galvanometer processing head 1 to move in a stepping manner, and the processing fields of the galvanometer processing head 1 are spliced ​​to eventually cover the entire processing pattern on the product.

[0008] There are several problems with the lead making equipment described above.

[0009] First, the motion platform adopts a conventional layout, and the motion platform format must cover the product's external dimensions. Therefore, the production cost of this high-precision large-scale platform is relatively high, and it is difficult to assemble and transport. Among them, the large-area, high-flatness vacuum adsorption stage is also an important factor in the high cost.

[0010] Secondly, the motion control of the gantry's double-sided drive is relatively complex, and related applications require high positioning accuracy (micron or even sub-micron) and fast movement speed. At this time, both the motion control and drive systems must adopt high-end configurations, which are relatively costly.

[0011] Finally, the span of the gantry beam needs to be more than 1 meter, which is difficult to manufacture and has high costs. The gantry beam is usually made of materials such as granite or cast aluminum alloy, and its mass is usually in the hundreds of kilograms, which seriously affects the positioning speed and accuracy of the motion platform. However, in order to ensure the stability of the structure and the accuracy of the appearance, a larger cross-sectional area of ​​the beam is often required, which leads to a further increase in mass. It should be pointed out that during the entire processing process, the motion platform performs stepping motion, and it is in a state of frequent rapid acceleration and deceleration. It is very difficult to obtain high-speed and high-precision stepping motion in the Y-axis direction (the direction of driving the gantry). If special materials such as carbon fiber and magnesium-aluminum alloy are used and weight-reducing processing technology is used, although the mass of the gantry can be reduced, the cost will inevitably increase significantly.

[0012] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0013] The purpose of the present invention is to provide a laser etching device, a processing method and a flexible display screen for the peripheral leads of a large-size (86 inches or above) flexible display screen. The laser etching device can realize the peripheral lead processing of a large-size (86 inches or above) flexible display screen only through a one-dimensional moving mechanism and a small-area vacuum adsorption stage, and has the advantages of low cost, high precision, high reliability and high efficiency.

[0014] To achieve the above objectives, an embodiment of the present invention provides a laser etching device for peripheral leads of a flexible display screen, comprising an optical platform, a one-dimensional moving mechanism, a CCD camera assembly and a laser galvanometer assembly.

[0015] The optical platform has a horizontal work surface, which is divided into a precision movement area and a common bearing area. A vacuum adsorption stage is arranged on the horizontal work surface in the precision movement area, which is used to tightly adsorb the area to be etched of the flexible display screen on its upper surface by vacuuming.

[0016] The one-dimensional moving mechanism is arranged in the precise moving area of ​​the horizontal worktable, and acts on the CCD camera assembly and the laser galvanometer assembly to provide a movable platform for them.

[0017] The CCD camera assembly is configured on the one-dimensional moving mechanism and located above the vacuum adsorption stage. The CCD camera assembly is used to read the positioning target of the flexible display screen in the corresponding area, and identify the offset and tilt angle of the area to be etched of the flexible display screen based on the positioning target.

[0018] The laser galvanometer assembly is configured on the one-dimensional moving mechanism and is located above the vacuum adsorption stage. The laser galvanometer assembly adjusts its own position according to the offset and tilt angle recognized by the CCD camera assembly, and moves along the one-dimensional moving mechanism to act on the area to be etched of the flexible display screen to perform laser etching on its peripheral leads.

[0019] In one or more embodiments of the present invention, a dust suction mechanism is further included. The dust suction mechanism is located above the vacuum adsorption stage and below the laser galvanometer assembly, and is used to suck away dust vaporized from the silver paste during etching.

[0020] In one or more embodiments of the present invention, the surface of the vacuum adsorption stage is arranged flush with the horizontal work surface of the common carrying area.

[0021] In one or more embodiments of the present invention, the maximum length of the vacuum adsorption stage is greater than the maximum length of the flexible display screen.

[0022] In one or more embodiments of the present invention, the laser galvanometer assembly includes a laser, an optical galvanometer and a focusing lens. The laser emitted by the laser is coaxially and parallelly incident on the optical galvanometer. The optical galvanometer reflects the incident parallel light onto the focusing lens, and the focusing lens focuses it to achieve laser etching.

[0023] In one or more embodiments of the present invention, the field of view of the optical galvanometer is larger than 50×50 mm, which is sufficient to cover the width of the lead area.

[0024] In one or more embodiments of the present invention, the CCD camera assembly includes two CCD cameras, both of which are arranged on the one-dimensional moving mechanism and can move along the one-dimensional moving mechanism, and the two CCD cameras are respectively arranged at both ends of the laser galvanometer assembly.

[0025] An embodiment of the present invention further provides a method for processing peripheral leads of a flexible display screen, comprising: using screen printing silver paste to form the overall area contour of the peripheral leads of the flexible display screen; positioning and vacuum adsorption fixing the first side area to be etched of the flexible display screen, and performing lead etching on the area to be etched on this side of the flexible display screen; rotating the flexible display screen 90 degrees and positioning it again and vacuum adsorption fixing it, and performing lead etching on the second side area to be etched after the flexible display screen is rotated 90 degrees, and the leads etched this time are connected to the leads etched last time in a one-to-one correspondence; repeating the previous step until the lead etching is completed.

[0026] In one or more embodiments of the present invention, the positioning of the area to be etched on the first side of the flexible display screen includes: using a CCD camera to read a positioning target on the first side of the flexible display screen, and identifying the offset and tilt angle of the area to be etched on the first side of the flexible display screen based on the positioning target; using a laser galvanometer assembly to control it to adjust its own position according to the offset and tilt angle identified by the CCD camera, and act on the area to be etched on the first side of the flexible display screen to perform laser etching of the lead on the area to be etched.

[0027] In one or more embodiments of the present invention, the flexible display screen is rotated 90 degrees and re-positioned, including: using a CCD camera to read the positioning target of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees, and identifying the inclination angle of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees according to the positioning target; using a CCD camera to read the pattern of the previous etching, and calculating and controlling the offset of the laser galvanometer assembly according to the read pattern of the previous etching, so that the leads etched this time are connected one-to-one with the leads etched last time.

[0028] In one or more embodiments of the present invention, the reading of the previously etched pattern includes: reading the complete lead pattern etched previously, and / or reading the end portion to be spliced ​​of the previously etched lead pattern.

[0029] An embodiment of the present invention further provides a flexible display screen, comprising a functional area and a lead area, wherein the lead area is arranged at the periphery of the functional area and is arranged one-to-one with the functional area, and the lead area is processed by the flexible display screen periphery lead processing method described in any one of claims 5-8 above.

[0030] In one or more embodiments of the present invention, the width of the lead area is 5-30 mm, the width of the lead in the area is 30-500 um, and the spacing between adjacent lead in the area is 5-50 um.

[0031] Compared with the prior art, the laser etching device for the peripheral leads of the flexible display screen in the embodiment of the present invention simplifies the two-dimensional mobile motion platform into a one-dimensional mobile motion platform, and cooperates with a small-area vacuum adsorption stage. There is no need to drive a bulky gantry to drive the optical galvanometer to move, which greatly improves the motion performance and motion accuracy of the optical galvanometer, greatly increases the processing efficiency, and has the advantages of low cost, high precision, high reliability and high efficiency.

[0032] The laser etching device for the peripheral leads of a flexible display screen in the embodiment of the present invention provides two movable CCD cameras, which respectively move to identify two positioning targets or read the graphics etched last time, thereby reducing the movement time and improving the detection and positioning speed.

[0033] The method for processing the peripheral leads of a flexible display screen in an embodiment of the present invention is a processing technology specially designed for the laser etching device of the peripheral leads of the flexible display screen of the present invention. It can improve the processing accuracy of the peripheral leads and save processing costs by performing single-sided processing of the peripheral leads of the flexible display screen and performing multiple side-by-side splicing processing.

[0034] The processing method of the peripheral lead of the flexible display screen of the embodiment of the present invention is to realize accurate splicing on the previously processed graphics to process the subsequent graphics. Before the subsequent processing, the CCD camera needs to recognize the graphics of the previously processed graphics on the basis of recognizing two positioning targets. The double recognition and positioning can greatly improve the splicing accuracy and effectively avoid error accumulation.

[0035] The processing method of the peripheral leads of the flexible display screen in the embodiment of the present invention sets a processing optical galvanometer with a field of view greater than 50×50 mm to cover the width of the entire lead area; and this processing method does not need to use the entire square area of ​​the galvanometer field of view, but mainly uses part of the middle area, which can greatly reduce the difficulty of distortion correction of the galvanometer and greatly improve the accuracy.

[0036] The flexible display screen of the embodiment of the present invention has a small spacing between leads, which is beneficial to the narrow frame design of the display; secondly, the width of the leads themselves is large, which is beneficial to reducing resistance and improving conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the double-side driving structure of the moving gantry for processing large-size flexible display screens in the prior art;

[0038] Figure 2 It is a schematic structural diagram of a laser etching device for peripheral leads of a flexible display screen according to an embodiment of the present invention;

[0039] Figure 3 is a schematic structural diagram of a flexible display screen according to an embodiment of the present invention;

[0040] Figure 4 yes Figure 3 The enlarged detail image at C in the middle;

[0041] Figure 5 yes Figure 3 The enlarged detail image at D in the middle;

[0042] Figure 6 The present invention is a flowchart of a method for processing peripheral leads of a flexible display screen according to an embodiment of the present invention.

[0043] Figure 7 This is a schematic diagram of the field of view distortion of the galvanometer in the laser etching device for the peripheral leads of a flexible display screen according to an embodiment of the present invention (the middle area is the field of view area actually used by the processing device and the processing method). DETAILED DESCRIPTION

[0044] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0045] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0046] like Figure 2 As shown, an embodiment of the present invention provides a laser etching device for peripheral leads of a flexible display screen, comprising an optical platform 10, a one-dimensional moving mechanism 20, a CCD camera assembly, and a laser galvanometer assembly 40. The one-dimensional moving mechanism 20 is mounted on the optical platform 10, and the CCD camera assembly and the laser galvanometer assembly 40 are both arranged on the one-dimensional moving mechanism 20, and can move relative to the optical platform 10 under the action of the one-dimensional moving mechanism 20.

[0047] The optical platform 10 has a horizontal work surface, which is divided into a precision motion area 11A and a common bearing area 11B along its width direction, wherein the area of ​​the common bearing area 11B is larger than that of the precision motion area 11A.

[0048] In a specific embodiment, the width of the precision motion area 11A is 1 / 2 or 1 / 3 of the width of the common bearing area 11B.

[0049] A vacuum adsorption stage 12 is provided in the precision motion area 11A on the horizontal work surface. The vacuum adsorption stage 12 is extended along the length direction of the precision motion area 11A, and the upper surface of the vacuum adsorption stage 12 is flush with the upper surface of the common carrying area 11B. The vacuum adsorption stage 12 is used to tightly adsorb the area to be etched of the flexible display screen on its upper surface by vacuuming, and the other parts of the flexible display screen can be placed on the common carrying area 11B of the horizontal work surface.

[0050] In a specific embodiment, the maximum length of the vacuum adsorption stage 12 is greater than the maximum length of the flexible display screen to be etched.

[0051] In a specific embodiment, a rotating table may be provided on the common bearing area 11B, and adsorption holes are provided on the surface of the rotating table. The rotating table may be controlled by a rotating motor to rotate the flexible display screen thereon so as to etch the peripheral leads on different sides. During the rotation process, the vacuum adsorption stage 12 releases the vacuum adsorption of the flexible display screen, and the flexible display screen is adsorbed and rotated by the rotating table. After the display screen is rotated into place, it is re-adsorbed and fixed by the vacuum adsorption stage 12. The upper surface of the rotating table is flush with the upper surface of the vacuum adsorption stage 12.

[0052] In other specific embodiments, the flexible display screen may also be rotated manually.

[0053] The one-dimensional moving mechanism 20 is arranged in the precision motion area 11A of the horizontal worktable, and acts on the CCD camera assembly and the laser galvanometer assembly 40 to provide a movable platform for the two. The one-dimensional moving mechanism 20 may include a linear guide 21 arranged along the length direction of the precision motion area 11A, a plurality of slides 22 arranged on the linear guide 21, and a plurality of drive motors 23 driving the slides 22 to move along the linear guide 21.

[0054] The CCD camera assembly includes two CCD cameras, which are respectively arranged on the slide 22 at both ends of the linear guide rail 21 of the one-dimensional moving mechanism 20 and are located above the vacuum adsorption stage 12. The CCD camera assembly is used to read the positioning target 53 of the flexible display screen in the corresponding area, and identify the offset and tilt angle of the area to be etched of the flexible display screen based on the positioning target 53.

[0055] The laser galvanometer assembly 40 is arranged on the slide 22 of the one-dimensional moving mechanism 20 located in the middle of the linear guide 21 (two CCD cameras are arranged on both sides of the laser galvanometer assembly 40), and is also located above the vacuum adsorption stage 12. The laser galvanometer assembly 40 adjusts its position according to the offset and tilt angle recognized by the CCD camera assembly, and moves along the one-dimensional moving mechanism 20 to act on the area to be etched of the flexible display screen to perform laser etching of the peripheral leads. The laser galvanometer assembly 40 includes a laser, an optical galvanometer and a focusing lens. The laser emitted by the laser is coaxially and parallelly incident on the optical galvanometer. The optical galvanometer reflects the incident parallel light onto the focusing lens, and the focusing lens focuses it to achieve laser etching. Among them, the field of view of the optical galvanometer is greater than 50×50mm, which is sufficient to cover the width of the lead area.

[0056] In a specific embodiment, the laser etching device for the peripheral leads of the flexible display screen may further include a dust suction mechanism (not shown), which may be disposed above the vacuum adsorption stage and below the laser galvanometer assembly 40 to suck away dust vaporized from the silver paste during etching.

[0057] The coordination between the above structures and the measurement and calculation of the offset and tilt angle can be controlled by a control mechanism (with its own control software or connected to an external control program). No further elaboration will be given here.

[0058] refer to Figures 3 to 5 As shown, the present invention provides a flexible display screen, including a functional area 51 and a lead area 52, wherein the lead area 52 is arranged at the periphery of the functional area 51 and is arranged one-to-one with the functional area 51. The area width of the lead area 52 is 5-30 mm, the width of the lead in the area is 30-500 um, and the spacing between adjacent leads in the area is 5-50 um. The middle functional area 51 can be a liquid crystal display pixel, a backlight array, a capacitive or resistive touch unit array, etc. The middle functional area 51 can be connected to an external power supply and subsequent processing circuits through peripheral leads.

[0059] refer to Figure 6As shown, an embodiment of the present invention further provides a method for processing peripheral leads of a flexible display screen, comprising: using screen printing silver paste to form an overall area outline of the peripheral leads of the flexible display screen s1; positioning and vacuum adsorbing and fixing the first side area to be etched of the flexible display screen, and performing lead etching on the area to be etched on this side of the flexible display screen s2; rotating the flexible display screen 90 degrees and positioning it again and then vacuum adsorbing and fixing it, and performing lead etching on the second side area to be etched after the flexible display screen is rotated 90 degrees s3, and the leads etched this time are connected to the leads etched last time in a one-to-one correspondence; repeating the previous step until the lead etching is completed s4.

[0060] In one or more embodiments of the present invention, the positioning of the area to be etched on the first side of the flexible display screen includes: using a CCD camera to read the positioning target 53 on the first side of the flexible display screen, and identifying the offset and tilt angle of the area to be etched on the first side of the flexible display screen based on the positioning target 53; using a laser galvanometer assembly to control it to adjust its own position according to the offset and tilt angle identified by the CCD camera, and act on the area to be etched on the first side of the flexible display screen to perform laser etching of the lead on the area to be etched.

[0061] After the flexible display screen is placed manually or automatically rotated by a rotating mechanism, there will be a certain displacement deviation in the flexible display screen, and the skew correction of the placement is required. The positioning targets 53 on the flexible display screen are read by a camera (at least two positioning targets 53 are identified each time), and then the offset and tilt angle of the flexible display screen are calculated and identified by a computer. During the galvanometer processing, the original processing graphics are moved and rotated accordingly to make the galvanometer processing adapt to the skew of the flexible display screen.

[0062] In one or more embodiments of the present invention, the flexible display screen is rotated 90 degrees and re-positioned, including: using a CCD camera to read the positioning target 53 of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees, and identifying the inclination angle of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees according to the positioning target 53; using a CCD camera to read the pattern of the previous etching, and calculating and controlling the offset of the laser galvanometer assembly according to the read pattern of the previous etching, so that the leads etched this time are connected one-to-one with the leads etched last time.

[0063] In order to achieve accurate splicing of the previously processed graphics to process the next graphics, before the next processing, the CCD camera needs to recognize the graphics of the previous processing on the basis of the two positioning targets 53. The double recognition and positioning can greatly improve the splicing accuracy and effectively avoid error accumulation. The principle is that: the positioning target 53 is usually made by screen printing, and the graphics accuracy is low, while the peripheral lead graphics processed by laser have higher accuracy. In addition, the previous processing cannot be completely consistent with the positioning target 53 on the flexible display screen. The camera also needs to recognize the graphics of the previous processing to effectively avoid error accumulation.

[0064] In one or more embodiments of the present invention, the reading of the previously etched pattern includes: reading the complete lead pattern etched previously, and / or reading the end portion to be spliced ​​of the previously etched lead pattern.

[0065] Compared with the prior art, the laser etching device for the peripheral leads of the flexible display screen in the embodiment of the present invention simplifies the two-dimensional mobile motion platform into a one-dimensional mobile motion platform, and cooperates with a small-area vacuum adsorption stage. There is no need to drive a bulky gantry to drive the optical galvanometer to move, which greatly improves the motion performance and motion accuracy of the optical galvanometer, greatly increases the processing efficiency, and has the advantages of low cost, high precision, high reliability and high efficiency.

[0066] The laser etching device for the peripheral leads of a flexible display screen in the embodiment of the present invention provides two movable CCD cameras, which respectively move to identify two positioning targets or read the graphics etched last time, thereby reducing the movement time and improving the detection and positioning speed.

[0067] The method for processing the peripheral leads of a flexible display screen in an embodiment of the present invention is a processing technology specially designed for the laser etching device of the peripheral leads of the flexible display screen of the present invention. It can improve the processing accuracy of the peripheral leads and save processing costs by performing single-sided processing of the peripheral leads of the flexible display screen and performing multiple side-by-side splicing processing.

[0068] The processing method of the peripheral lead of the flexible display screen of the embodiment of the present invention is to realize accurate splicing on the previously processed graphics to process the subsequent graphics. Before the subsequent processing, the CCD camera needs to recognize the graphics of the previously processed graphics on the basis of recognizing two positioning targets. The double recognition and positioning can greatly improve the splicing accuracy and effectively avoid error accumulation.

[0069] The processing method of the peripheral lead of the flexible display screen of the embodiment of the present invention is to set a processing optical galvanometer with a field of view greater than 50×50 mm to cover the width of the entire lead area; and the processing method does not need to use the entire square area of ​​the full galvanometer field of view, and mainly uses part of the middle area, such as Figure 7As shown, the difficulty of galvanometer distortion correction can be greatly reduced and the accuracy can be greatly improved.

[0070] The flexible display screen of the embodiment of the present invention has a small spacing between leads, which is beneficial to the narrow frame design of the display; secondly, the width of the leads themselves is large, which is beneficial to reducing resistance and improving conductivity.

[0071] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A laser etching device for peripheral leads of a flexible display screen, which is used for laser etching of peripheral leads of a large-size flexible display screen, characterized in that: The laser etching device includes an optical platform, a one-dimensional moving mechanism, a CCD camera assembly and a laser galvanometer assembly; The optical platform has a horizontal work surface, and the horizontal work surface is divided into a precision motion area and a common bearing area along its width direction. The area of ​​the common bearing area is larger than that of the precision motion area. A vacuum adsorption stage is arranged on the horizontal work surface in the precision motion area, which is used to tightly adsorb the area to be etched on the upper surface of the flexible display screen by vacuuming, and the other parts of the flexible display screen are placed on the common bearing area of ​​the horizontal work surface. The maximum length of the vacuum adsorption stage is larger than the maximum length of the flexible display screen. The one-dimensional moving mechanism is arranged in the precision moving area of ​​the horizontal worktable, and acts on the CCD camera assembly and the laser galvanometer assembly to provide a platform and power for their movement; The CCD camera assembly is arranged on the one-dimensional moving mechanism and is located above the vacuum adsorption stage. The CCD camera assembly is used to read the positioning target of the flexible display screen in the corresponding area, and identify the offset and tilt angle of the area to be etched of the flexible display screen according to the positioning target; The laser galvanometer assembly is configured on the one-dimensional moving mechanism and is located above the vacuum adsorption stage. The laser galvanometer assembly adjusts its position according to the offset and tilt angle recognized by the CCD camera assembly, and moves along the one-dimensional moving mechanism to act on the to-be-etched area of ​​the flexible display screen to perform laser etching on the peripheral leads thereof. The invention also comprises a rotating platform, which is used for rotating the flexible display screen thereon so as to etch the peripheral leads on different sides.

2. The laser etching device for peripheral leads of a flexible display screen as claimed in claim 1, characterized in that: Adsorption holes are provided on the surface of the rotating table; During the rotation process, the vacuum adsorption stage releases the vacuum adsorption on the flexible display screen, the rotating stage adsorbs the flexible display screen and rotates, and after rotating into place, the vacuum adsorption stage re-adsorbs and fixes it.

3. The laser etching device for peripheral leads of a flexible display screen as claimed in claim 1, characterized in that: It also includes a dust suction mechanism, which is located above the vacuum adsorption stage and below the laser galvanometer assembly and is used to suck away dust vaporized from the silver paste during etching.

4. The laser etching device for peripheral leads of a flexible display screen as claimed in claim 1, characterized in that: The surface of the vacuum adsorption stage is arranged flush with the horizontal work surface of the common carrying area.

5. The laser etching device for peripheral leads of a flexible display screen as claimed in claim 1, characterized in that: The laser galvanometer assembly includes a laser, an optical galvanometer and a focusing lens. The laser emitted by the laser is incident on the optical galvanometer coaxially and parallely. The optical galvanometer reflects the incident parallel light onto the focusing lens, and the focusing lens focuses the incident parallel light to achieve laser etching.

6. A method for processing peripheral leads of a flexible display screen, using the laser etching device for peripheral leads of a flexible display screen as claimed in any one of claims 1 to 5, characterized in that: Processing methods include: Screen printing silver paste is used to form the overall area outline of the peripheral leads of the flexible display screen; Positioning and fixing the first side of the flexible display screen in the area to be etched by vacuum adsorption, and performing lead etching on the area to be etched on the side of the flexible display screen; The flexible display screen is rotated 90 degrees and positioned for a second time, and then fixed by vacuum adsorption. The lead is etched on the second side of the to-be-etched area after the flexible display screen is rotated 90 degrees, and the lead etched this time is connected to the lead etched previously in a one-to-one correspondence; Repeat the previous step until the lead etching is completed.

7. The method for processing the peripheral lead of the flexible display screen according to claim 6, characterized in that: The positioning of the to-be-etched area on the first side of the flexible display screen includes: A CCD camera is used to read the positioning target on the first side of the flexible display screen, and an offset and a tilt angle of the area to be etched on the first side of the flexible display screen are identified according to the positioning target; A laser galvanometer assembly is used to control its position according to the offset and tilt angle recognized by the CCD camera, and acts on the etching area on the first side of the flexible display screen to perform laser etching of the lead wires on the etching area.

8. The method for processing the peripheral lead of the flexible display screen according to claim 6, characterized in that: The step of rotating the flexible display screen by 90 degrees and performing secondary positioning includes: A CCD camera is used to read the positioning target of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees, and the inclination angle of the area to be etched on the second side of the flexible display screen after the flexible display screen is rotated 90 degrees is identified according to the positioning target; A CCD camera is used to read the pattern etched last time, and the offset of the laser galvanometer assembly is calculated and controlled according to the pattern etched last time, so that the leads etched this time are connected to the leads etched last time in a one-to-one correspondence.

9. The method for processing the peripheral lead of the flexible display screen according to claim 8, characterized in that: The reading of the last etched pattern comprises: The complete lead pattern etched last time is read, and / or the end portion to be spliced ​​of the lead pattern etched last time is read.

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