CN110224084B - Method for attaching circular polarizer of flexible OLED display panel - Google Patents
Method for attaching circular polarizer of flexible OLED display panel Download PDFInfo
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- CN110224084B CN110224084B CN201910383851.1A CN201910383851A CN110224084B CN 110224084 B CN110224084 B CN 110224084B CN 201910383851 A CN201910383851 A CN 201910383851A CN 110224084 B CN110224084 B CN 110224084B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/868—Arrangements for polarized light emission
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention provides a method for attaching a circular polarizer of a flexible OLED display panel, which comprises the steps of cutting the whole circular polarizer, aligning small pieces, attaching, and then cutting and modifying by laser. Therefore, this improvement is a significant advance in the fabrication of the entire flexible OLED display panel.
Description
Technical Field
The invention belongs to the field of OLED display panel manufacturing, and particularly relates to a method for attaching a circular polarizer of a flexible OLED display panel.
Background
Modern electronic technology has developed rapidly, especially display screen technology, from mature LCD to OLED now applied more and more widely, and flexible and bendable OLED display panels have been developed. The preparation of the flexible OLED display panel is greatly different from that of a common OLED display panel, the difficulty of the preparation is higher, and the working procedures are also greatly different from that of the common OLED display panel.
When the flexible OLED display panel is manufactured, the circular polarizer is also an indispensable element, and the requirement on the size cutting accuracy of the circular polarizer is high, so that the circular polarizer becomes an important link with excellent quality. In the production process of the flexible OLED display panel, a laser cutting device is required; particularly, in the production of the narrow frame of the existing display panel, the circular polarizer and the flexible panel are generally required to be respectively cut into required shapes (for example, the circular polarizer and the flexible panel are in a hole-shaped special shape or other special shapes), and then the cut circular polarizer and the flexible panel are attached, as shown in fig. 1, the flexible OLED display panel is generally required to be slightly larger than the circular polarizer in size and to ensure that the attachment accuracy is very high, but the requirement of extremely high accuracy on production equipment and production process is extremely strict, the product yield is low, and the production cost is high.
Disclosure of Invention
The technical problem is as follows: the invention provides a circular polarizer laminating method of a flexible OLED display panel, which aims to solve the problems that in the prior art, the laminating difficulty of the flexible OLED display panel and the circular polarizer is high, and the product yield is low.
The technical scheme is as follows: the invention provides a method for laminating a circular polarizer of a flexible OLED display panel, which comprises the following specific steps:
step one, cutting the whole circular polaroid: cutting the whole circular polarizer into a plurality of small circular polarizers, wherein the size of each small circular polarizer is slightly larger than or equal to that of the flexible OLED display panel; inspecting the small circular polaroid to remove defective products;
step two, alignment operation: the small circular polarizer and one corner of the flexible OLED display panel are corrected through an L-shaped card and a die, so that integral alignment is realized;
step three, laminating operation: the integrally aligned small circular polarizer is attached to the flexible OLED display panel; forming an OLED display panel with a circular polarizer;
step four, cutting and modifying: cutting and trimming the OLED display panel with the circular polarizer through a laser cutter to obtain the OLED display panel with the circular polarizer with the target size and shape; the laser cutter is a UV laser cutter.
Preferably, in the step one, the flexible OLED display panel is rectangular; in the fourth step, the target size of the OLED display panel with a circular polarizer is a special shape or a regular shape or a perforated shape or a combination of shapes.
Preferably, the small circular polarizer is 0.1-0.5mm longer than the side length of the flexible OLED display panel.
Preferably, in the fourth step, a workbench is laid below the flexible OLED display panel, a cooling groove is arranged on a cutting path of laser emitted by the laser cutter, the cooling groove is arranged on the upper surface of the workbench, and the laser penetrates through the OLED display panel with the circular polarizer and is emitted into the cooling groove.
Preferably, the flexible OLED display panel is a narrow-frame flexible OLED display panel.
The invention also provides application of the method in cutting of the narrow-frame flexible OLED display panel.
Has the advantages that: compared with the prior art, the circular polarizer laminating method of the flexible OLED display panel is improved after a large-scale cutting process, reduces the laminating deviation risk caused by inaccurate alignment in the past, improves the product precision, shortens the product preparation time, and is particularly suitable for cutting narrow-frame display panels. In addition, the cooling groove on the surface of the adopted die ensures that laser light can well penetrate when the laser cutter cuts, and reduces the risk of damaging the flexible OLED display panel by laser. Therefore, this improvement is a significant advance in the fabrication of the entire flexible OLED display panel.
Drawings
FIG. 1 is a schematic flow chart of a comparative example.
FIG. 2 is a schematic flow chart of an embodiment.
Fig. 3 is a schematic structural diagram of the workbench.
In the drawings: 1. a work table; 2. a suction hole; 3. cooling the groove; 4. a laser cutter; 5. a small circular polarizer; 6. a flexible OLED display panel.
Detailed Description
The present invention is further explained below.
Comparative example
As shown in fig. 1, the circular polarizer and the flexible OLED display panel are cut from large to small pieces, then are subjected to special-shaped cutting, and are cut into almost the same size and shape, and then are aligned and bonded to perform overall cutting.
Examples
As shown in fig. 2, the flexible OLED display panels are attached to each other after fabrication, but are not completely attached. During manufacturing, a plurality of flexible OLED display panels are orderly arranged and manufactured, the flexible OLED display panels are formed by laminating a plurality of layers of materials, each layer has respective functions, but generally only the protection/isolation layers are connected with adjacent flexible OLED display panels. Therefore, the flexible OLED display panels can be separated to form the independent flexible OLED display panel only by cutting the flexible OLED display panels off from the flexible substrate, but the flexible OLED display panels are rectangular, the finished products are irregular at present, and cutting, trimming and even hole digging are needed, such as a front camera hole and an earphone hole of a mobile phone.
According to the invention, in the first step, a large circular polaroid is cut into small circular polaroids, the general size of the whole circular polaroid is 900mm multiplied by 700mm, so that the size of the small circular polaroid is slightly larger than or equal to that of the flexible OLED display panel, the precision is not required to be very high, the small circular polaroids are rectangular, the cutting is convenient, and the flexible OLED display panel only needs to be covered. And then, inspecting the small circular polaroid to remove defective products. The flexible OLED display panel is also rectangular. In order to save materials and ensure coverage, the small circular polarizer is 0.1-0.5mm longer than the side length of the flexible OLED display panel.
And step two, alignment operation: the small circular polarizer and one corner of the flexible OLED display panel are corrected through the L-shaped card and the die, so that integral alignment is realized;
step three, laminating operation: the integrally aligned small circular polarizer is attached to the flexible OLED display panel; forming an OLED display panel with a circular polarizer; because the small circular polaroid and the flexible OLED display panel in the step of the invention are rectangular, the difficulty of laminating is greatly reduced, and the yield is greatly improved.
The attaching manner is various, such as rolling attaching, mechanical arm plane attaching, manual attaching and the like.
Fourthly, cutting and modifying again: cutting and trimming the OLED display panel with the circular polarizer by a laser cutter to obtain the OLED display panel with the circular polarizer with the target size and shape; the laser cutter is a UV laser cutter. The target size of the circular polarizer-equipped OLED display panel may be a special shape or a regular shape or a perforated shape or a combination of shapes. For example, the bang screen in the current mobile phone screen, the earphone hole and the camera hole are also arranged on the bang screen. The small circular polaroid and the OLED display panel are cut simultaneously, the yield of the cut target-shaped OLED display panel with the circular polaroid and the full coverage of the circular polaroid are guaranteed, the cutting tool is particularly suitable for manufacturing narrow-frame flexible OLED display panels, the yield is greatly improved, and the production efficiency is also greatly improved.
In addition, as shown in fig. 3, in order to ensure good penetration of the penetrating laser light and reduce the risk of damage to the flexible OLED display panel 6 caused by the reflection of the penetrating laser during cutting, a workbench 1 is laid under the flexible OLED display panel 6, a cooling groove 3 is arranged on a cutting path of the laser emitted by the laser cutter 4, and the cooling groove 3 is arranged on the upper surface of the workbench 1. A group of air suction holes 2 which penetrate through the workbench 1 up and down are distributed at intervals at the central position of the workbench 1 right below the flexible OLED display panel 6; when cutting is performed, cooling liquid is placed in the cooling groove 3. The laser penetrates the OLED display panel with the circular polarizer and is emitted into the cooling groove 3.
Compared with the prior art, after the flexible OLED display panel 6 is cut into a large sheet, the small circular polarizer 5 and the OLED display panel are simultaneously cut into shapes, so that the product quality reject ratio caused by malposition caused by two times of shape cutting in a comparative example is greatly reduced. In addition, the number of the air suction holes can be multiple, the lower end of the air suction holes is connected with an air suction pump, when a laser cutter is used for cutting the panel, the air suction pump is started, and the panel is adsorbed and fixed on the workbench through the air suction holes.
Example 1
According to the working principle of the above embodiment, the present invention further discloses another implementation manner:
in the first step, the flexible OLED display panel connected with each other does not need to be cut into a single flexible OLED display panel, and the whole piece of the flexible OLED display panel connected with each other is placed on a panel carrier, wherein the common size of the flexible OLED display panel is 900mm multiplied by 700 mm. The large whole circular polaroid is not required to be cut into small circular polaroids; the typical dimensions are also 900mm x 700mm, although dimensions slightly larger than this may be selected.
Secondly, carrying out side alignment on the integrally connected flexible OLED display panel, and calibrating one corner of the large circular polarizer and the integrally connected flexible OLED display panel through an L-shaped card and a die to realize integral alignment;
step three, laminating operation: attaching the integrally aligned large circular polarizer to the integrally connected flexible OLED display panel; forming a large OLED display panel with a circular polarizer;
and fourthly, cutting and trimming the shape, namely cutting and trimming the large OLED display panel with the circular polaroid by a laser cutter to obtain a single OLED display panel with the target size and shape and the circular polaroid.
In order to ensure that the penetrating laser light can penetrate well during cutting and reduce the risk of damage to the flexible OLED display panel by the reflected laser, a workbench similar to that described in the previous embodiment may be disposed at a corresponding position below each OLED display panel with a circular polarizer.
In this embodiment 1, a large circular polarizer and the entire flexible OLED display panel connected to each other do not need to be divided, but after a large sheet is aligned and attached, laser cutting and trimming are directly performed to form a plurality of target-shaped single OLED display panels with circular polarizers. The speed of the whole process is greatly improved, and the cutting efficiency is greatly improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. The laminating method of the circular polarizer of the flexible OLED display panel is characterized by comprising the following specific steps of:
step one, cutting the whole circular polaroid: cutting the whole circular polarizer into a plurality of small circular polarizers, wherein the size of the whole circular polarizer is 900mm multiplied by 700mm, and the size of the small circular polarizer is slightly larger than or equal to that of the flexible OLED display panel; inspecting the small circular polaroid to remove defective products;
the length of the small circular polarizer is 0.1-0.5mm longer than the side length of the flexible OLED display panel; the flexible OLED display panel is rectangular;
step two, alignment operation: the small circular polarizer and one corner of the flexible OLED display panel are corrected through an L-shaped card and a die, so that integral alignment is realized;
step three, laminating operation: the integrally aligned small circular polarizer is attached to the flexible OLED display panel; forming an OLED display panel with a circular polarizer; the attaching mode comprises any one of rolling type attaching, manipulator plane attaching and manual attaching;
step four, cutting and modifying: cutting and trimming the OLED display panel with the circular polarizer through a laser cutter to obtain the OLED display panel with the circular polarizer with the target size and shape; the laser cutter is a UV laser cutter; the target size of the OLED display panel with the circular polarizer is in an abnormal shape or a regular shape or a perforated shape or a combination of multiple shapes; the mobile phone comprises a mobile phone screen, a mobile phone receiver, a mobile phone camera and a mobile phone, wherein a receiver opening and a camera opening are cut on the mobile phone screen;
a workbench is laid below the flexible OLED display panel, a cooling groove is arranged on a cutting path of laser emitted by the laser cutter, the cooling groove is arranged on the upper surface of the workbench, and the laser penetrates through the OLED display panel with the circular polarizer and is emitted to the cooling groove;
a group of air suction holes which penetrate through the workbench up and down are distributed at intervals at the central position of the workbench right below the flexible OLED display panel; when cutting is carried out, cooling liquid is placed in the cooling groove; laser penetrates through the OLED display panel with the circular polarizer and is emitted into the cooling groove; the number of the air suction holes is multiple, the lower end of the air suction holes is connected with an air suction pump, when a laser cutter is used for cutting the panel, the air suction pump is started, and the panel is fixed on the workbench in an adsorption mode through the air suction holes;
the flexible OLED display panel is a narrow-frame flexible OLED display panel.
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| CN201910383851.1A CN110224084B (en) | 2019-05-09 | 2019-05-09 | Method for attaching circular polarizer of flexible OLED display panel |
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| CN113906336B (en) * | 2020-03-17 | 2023-11-14 | 京东方科技集团股份有限公司 | Display panel, display device and manufacturing method of display panel |
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