OLED (Organic Light Emitting Diode) and OCA (Optical Clear Adhesive) lamination bubble repairing device and repairing method

Abstract

The invention relates to OLED (Organic Light Emitting Diode) manufacturing, in particular to an OLED and OCA (Optical Clear Adhesive) lamination bubble repairing device, a repairing method and a visual system, which are used for carrying out space positioning on bubbles in an OLED product to be repaired, sending position compensation data to a servo system, accurately controlling the entering height and depth of a micro injection needle and monitoring the glue injection condition at the same time. The servo system drives the fixed platform to drive the to-be-repaired OLED product to move according to the position compensation data, so that the micro injection needle enters the bubble from the side surface of the to-be-repaired OLED product, or directly drives the micro injection needle to enter the bubble from the side surface of the to-be-repaired OLED product; the controller is used for pressing the liquid OCR glue in the glue barrel into the micro injection needle head by controlling the pressure mechanism, controlling the glue injection amount and the glue injection speed by adjusting the glue valve, and injecting and filling the bubble cavity with the glue; the method can effectively overcome the defect that bonding bubbles of the OLED and the OCA are difficult to effectively repair.

Description

Technical Field

[0001] This invention relates to OLED manufacturing, and more specifically to an OLED and OCA bonding bubble repair device and repair method. Background Technology

[0002] In the field of OLED display module manufacturing, the module bonding process is a critical step, but the problem of bonding bubbles is unavoidable in this process. The bubble defect rate varies among different types of products, with the bubble defect rate of 2D / 2.5D products being about 0.02%, two-sided curved products having a bubble defect rate of 0.1%, and four-sided curved products having a bubble defect rate as high as 0.8%.

[0003] In actual production, unexpected anomalies can trigger the generation of bubbles in batches. These anomalies include material abnormalities, such as unstable quality of materials like OCA; abnormal equipment mechanisms, such as uneven bonding pressure caused by mechanical component failures in the bonding equipment; and parameter abnormalities, such as deviations in the set temperature and pressure parameters. Furthermore, some machine types are significantly affected by Q-Time (the maximum allowable time from the completion of one process to the start of the next), requiring stringent timeliness control during the manufacturing process. If degassing cannot be completed within the specified time, the success rate of degassing on the first attempt will be significantly reduced.

[0004] Currently, regarding OLED bonding bubbles (such as...) Figure 3 (As shown in the image) The main repair method is to enhance the degassing parameters and perform multiple degassing cycles. However, due to the limited absorption capacity of OCA for microbubbles, the overall repair success rate is only about 40%.

[0005] Especially for open air bubbles and ink bubbles in OCA bonding (such as...) Figure 4 As shown in the figure, there is currently no effective repair method. The traditional degassing principle is to dissolve the gas in closed bubbles into the surrounding OCA under suitable temperature and pressure conditions. However, open bubbles are connected to the outside world, and the gas cannot be completely absorbed. Ink bubbles are mostly present at the CG ink fracture, where the OCA is deformed and thinned to overcome the ink fracture, reducing the absorption capacity of the microbubbles, thus making it difficult for traditional methods to repair effectively. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides an OLED and OCA bonding bubble repair device and repair method, which can effectively overcome the defect of the prior art that makes it difficult to effectively repair OLED and OCA bonding bubbles.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] An OLED and OCA bonding bubble repair device includes a fixing platform, a vision system, a servo system, a micro-injection needle, a controller, a pressure mechanism, and an adhesive valve;

[0011] A fixing platform is used to hold the OLED product to be repaired.

[0012] The vision system is used to spatially locate air bubbles in the OLED product to be repaired and send the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process.

[0013] The servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired.

[0014] The controller uses a pressure mechanism to force the liquid OCR adhesive from the glue tank into the micro-injection needle, and adjusts the glue valve to control the amount and speed of glue injection, thus filling the air bubble cavity with glue.

[0015] Preferably, the fixed platform is provided with a first heating device for heating and softening the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, so as to facilitate subsequent glue injection and filling into the bubble cavity;

[0016] The fixed platform is equipped with a five-axis linkage servo system, which drives the OLED product to be repaired to move to any position in the space, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired.

[0017] Preferably, the fixing platform fixes the OLED product to be repaired by vacuum adsorption or clamping.

[0018] Preferably, the vision system acquires images of the OLED product to be repaired, performs target detection and target localization on the images, calculates the spatial position of the bubble, and sends the corresponding position compensation data to the servo system.

[0019] Preferably, the diameter of the micro-injection needle is smaller than the thickness of the OCA layer in the OLED product to be repaired, and the micro-injection needle is equipped with a five-axis linkage servo system and enters the bubble from the side of the OLED product to be repaired under the drive of the five-axis linkage servo system.

[0020] The thickness of the OCA layer is 50μm to 200μm.

[0021] Preferably, the pressure mechanism is a closed system, which provides clean and dry air (CDA) to the closed system to continuously provide pressure, thereby forcing the liquid OCR adhesive in the glue container into the micro-injection needle.

[0022] Preferably, the glue container is equipped with a second heating device for heating and softening the liquid OCR glue, thereby improving the fluidity of the liquid OCR glue and preventing clogging.

[0023] Preferably, the glue valve is selected with a suitable piezoelectric valve according to the viscosity characteristics of the liquid OCR glue, and the controller controls the glue injection amount and injection speed by adjusting the impact force and impact frequency of the glue valve.

[0024] A method for repairing air bubbles in the bonding of OLED and OCA components includes the following steps:

[0025] S1. Fix the OLED product to be repaired on the fixed platform;

[0026] S2. The vision system spatially locates the air bubbles in the OLED product to be repaired and sends the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process.

[0027] S3. The servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired.

[0028] S4. The controller presses the liquid OCR adhesive in the glue tank into the micro injection needle by controlling the pressure mechanism.

[0029] S5. The controller controls the amount and speed of glue injection by adjusting the glue valve to fill the air bubble cavity.

[0030] S6. After the glue injection is completed, a degassing treatment is performed to eliminate glue residue and tiny air bubbles.

[0031] Preferably, the fixed platform is provided with a first heating device for heating and softening the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, so as to facilitate subsequent glue injection and filling into the bubble cavity;

[0032] The glue tank is equipped with a second heating device for heating and softening the liquid OCR glue, thereby improving the fluidity of the liquid OCR glue and preventing clogging.

[0033] (III) Beneficial Effects

[0034] Compared with the prior art, the OLED and OCA bonding bubble repair device and repair method provided by the present invention directly fills the bubbles with secondary adhesive through a micro-needle injection filling scheme, which enhances the dissolving ability of OCA for micro bubbles, effectively repairs the OLED and OCA bonding bubbles, solves the problem that the prior art cannot repair the open bubbles and ink bubbles in the OCA bonding bubbles, and greatly improves the bonding yield of OLED display modules. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0036] Figure 1 This is a schematic diagram of the device structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the method flow of the present invention;

[0038] Figure 3 A schematic diagram of an open bubble in the OLED bonding bubble;

[0039] Figure 4 A schematic diagram of ink bubbles in OCA bonding bubbles. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] The following describes the specific components of the OLED and OCA bonding bubble repair device provided by this invention, using concrete examples (such as...). Figure 1 (As shown) and its technical effects. Specific components include a fixed platform, vision system, servo system, micro-injection needle, controller, pressure mechanism, and glue valve.

[0042] A fixing platform is used to hold the OLED product to be repaired.

[0043] The vision system is used to spatially locate air bubbles in the OLED product to be repaired and send the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process.

[0044] The servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired.

[0045] The controller uses a pressure mechanism to force the liquid OCR adhesive from the glue tank into the micro-injection needle, and adjusts the glue valve to control the amount and speed of glue injection, thus filling the air bubble cavity with glue.

[0046] I. Fixed Platform

[0047] A first heating device is provided on the fixed platform to heat and soften the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, so as to facilitate subsequent glue injection and filling into the bubble cavity.

[0048] The fixed platform is equipped with a five-axis linkage servo system (or other mechanisms or systems that can realize the relative spatial position change between the fixed platform and the micro-injection needle), and driven by the five-axis linkage servo system, it moves the OLED product to be repaired to any position in the space, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired.

[0049] The fixing platform fixes the OLED product to be repaired by vacuum adsorption or clamping.

[0050] II. Visual System

[0051] The vision system acquires images of the OLED product to be repaired, performs target detection and localization on the images, calculates the spatial position of the bubble, and sends the corresponding position compensation data to the servo system.

[0052] III. Miniature Injection Needles

[0053] The diameter of the micro-injection needle is smaller than the thickness of the OCA layer in the OLED product to be repaired. The micro-injection needle is equipped with a five-axis linkage servo system (or other mechanism or system that can realize the relative spatial position change between the fixed platform and the micro-injection needle), and enters the bubble from the side of the OLED product to be repaired under the drive of the five-axis linkage servo system.

[0054] The OCA layer has a thickness of 50μm to 200μm, while the needles currently used in in vitro fertilization are 1μm thick. Therefore, the existing technology can meet the needle customization requirements of this invention.

[0055] IV. Pressure Mechanism

[0056] The pressure mechanism is a closed system that provides continuous pressure by supplying clean, dry air (CDA) into the closed system to force the liquid OCR adhesive in the glue container into the micro-injection needle.

[0057] V. Glue Bucket

[0058] The glue container is equipped with a second heating device for heating and softening the liquid OCR glue, which improves the fluidity of the liquid OCR glue and prevents clogging.

[0059] VI. Glue Valve

[0060] The glue valve is selected with a suitable piezoelectric valve based on the viscosity characteristics of the liquid OCR glue. The controller controls the glue injection volume and speed by adjusting the impact force and frequency of the glue valve.

[0061] In this application, a microneedle injection filling method is used to directly fill the air bubbles with a second injection, which enhances the OCA's ability to dissolve micro air bubbles. This effectively repairs the air bubbles in the OLED and OCA bonding process, solving the problem that existing technologies cannot repair open air bubbles and ink bubbles in the OCA bonding process, and significantly improving the bonding yield of OLED display modules.

[0062] Based on the aforementioned OLED and OCA bonding bubble repair device, this invention also discloses an OLED and OCA bonding bubble repair method. The specific process of the OLED and OCA bonding bubble repair method provided by this invention is described below with reference to specific examples (e.g., Figure 2 (As shown).

[0063] 1. Fix the OLED product to be repaired on the fixed platform.

[0064] Second, the vision system spatially locates the air bubbles in the OLED product to be repaired and sends the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process.

[0065] Third, the servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired.

[0066] IV. The controller uses a pressure mechanism to force the liquid OCR adhesive from the glue tank into the micro-injection needle.

[0067] 5. The controller controls the amount and speed of glue injection by adjusting the glue valve to fill the air bubble cavity.

[0068] 6. After the glue injection is completed, degassing treatment is performed to eliminate glue residue and tiny air bubbles.

[0069] The above technical solution includes a first heating device on the fixed platform for heating and softening the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, which facilitates subsequent glue injection and filling into the bubble cavity.

[0070] The glue container is equipped with a second heating device for heating and softening the liquid OCR glue, which improves the fluidity of the liquid OCR glue and prevents clogging.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for repairing air bubbles in the bonding of OLED and OCA, characterized in that: This includes a fixed platform, vision system, servo system, miniature injection needle, controller, pressure mechanism, and glue valve; A fixing platform is used to hold the OLED product to be repaired. The vision system is used to spatially locate air bubbles in the OLED product to be repaired and send the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process. The servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired. The controller uses a pressure mechanism to force the liquid OCR adhesive from the glue tank into the micro-injection needle, and adjusts the glue valve to control the amount and speed of glue injection, thus filling the air bubble cavity with glue.

2. The OLED and OCA bonding bubble repair device according to claim 1, characterized in that: The fixed platform is equipped with a first heating device for heating and softening the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, so as to facilitate subsequent glue injection and filling into the bubble cavity. The fixed platform is equipped with a five-axis linkage servo system, which drives the OLED product to be repaired to move to any position in the space, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired.

3. The OLED and OCA bonding bubble repair device according to claim 2, characterized in that: The fixing platform fixes the OLED product to be repaired by vacuum adsorption or clamping.

4. The OLED and OCA bonding bubble repair device according to claim 1, characterized in that: The vision system acquires images of the OLED product to be repaired, performs target detection and localization on the images, calculates the spatial position of the bubble, and sends the corresponding position compensation data to the servo system.

5. The OLED and OCA bonding bubble repair device according to claim 1, characterized in that: The diameter of the micro-injection needle is smaller than the thickness of the OCA layer in the OLED product to be repaired. The micro-injection needle is equipped with a five-axis linkage servo system and enters the bubble from the side of the OLED product to be repaired under the drive of the five-axis linkage servo system. The thickness of the OCA layer is 50μm to 200μm.

6. The OLED and OCA bonding bubble repair device according to claim 1, characterized in that: The pressure mechanism is a closed system that provides clean, dry air (CDA) to the closed system to continuously apply pressure, thereby forcing the liquid OCR adhesive in the glue container into the micro-injection needle.

7. The OLED and OCA bonding bubble repair device according to claim 6, characterized in that: The glue tank is equipped with a second heating device for heating and softening the liquid OCR glue, thereby improving the fluidity of the liquid OCR glue and preventing clogging.

8. The OLED and OCA bonding bubble repair device according to claim 1, characterized in that: The adhesive valve is selected with a suitable piezoelectric valve based on the viscosity characteristics of the liquid OCR adhesive, and the controller controls the amount and speed of adhesive injection by adjusting the impact force and frequency of the adhesive valve.

9. A method for repairing air bubbles in the bonding of OLED and OCA, applied to the air bubble repair device for OLED and OCA as described in claim 1, characterized in that: Includes the following steps: S1. Fix the OLED product to be repaired on the fixed platform; S2. The vision system spatially locates the air bubbles in the OLED product to be repaired and sends the position compensation data to the servo system to precisely control the entry height and depth of the micro-injection needle, while monitoring the glue injection process. S3. The servo system drives the fixed platform to move the OLED product to be repaired based on the position compensation data, so that the micro-injection needle enters the bubble from the side of the OLED product to be repaired, or directly drives the micro-injection needle to enter the bubble from the side of the OLED product to be repaired. S4. The controller presses the liquid OCR adhesive in the glue tank into the micro injection needle by controlling the pressure mechanism. S5. The controller controls the amount and speed of glue injection by adjusting the glue valve to fill the air bubble cavity. S6. After the glue injection is completed, a degassing treatment is performed to eliminate glue residue and tiny air bubbles.

10. The method for repairing air bubbles in the bonding of OLED and OCA according to claim 9, characterized in that: The fixed platform is equipped with a first heating device for heating and softening the OCA layer at the location of the bubble in the OLED product to be repaired before glue injection, so as to facilitate subsequent glue injection and filling into the bubble cavity. The glue tank is equipped with a second heating device for heating and softening the liquid OCR glue, thereby improving the fluidity of the liquid OCR glue and preventing clogging.

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