TWI233667B - Packaging process of organic electroluminance display panel and curing process of sealant - Google Patents

Abstract

A packaging process of an organic electroluminance display panel is provided. The organic electroluminance display panel has a display region, where a plurality of organic electroluminance devices is disposed on. In the packaging process, a sealant can be preformed on the organic electroluminance display panel or a cover., Then, the cover is attached to the organic electroluminance display panel by the sealant, which is surrounded the display region. Next, a mask is provided for performing an UV curing to the sealant. The mask has a blocking region and a transparent region, wherein the blocking region is corresponding to the display region, and the transparent region is corresponding to the sealant. The packaging process of the organic electroluminance display panel and the curing process of the sealant can prevent the organic electroluminance devices from UV irradiation, and the yields can therefore be improved.

Description

1233667

The technical field to which the invention belongs ^ The present invention relates to a packaging process of a panel and a curing method of a frame adhesive ', and more particularly to a packaging process of an organic electroluminescent display panel and a curing process of a frame adhesive. With the advancement of information technology in the past, a variety of information equipment is constantly being introduced. Among them, in the display market, Flat Panel Display (FPD) has the characteristics of thinness, light weight and power saving. Gradually welcomed. Among various flat-panel displays, Organic Electroluminescent Display (Organic Electroluminance Display, Λ OLED) has the advantages of self-luminous, wide viewing angle, high response speed, low driving voltage, full color, etc., so it is very suitable for electronic clocks, mobile phones, etc. , Personal digital assistants and digital cameras and other display applications. Organic electro-optic light-emitting elements use two electrodes to sandwich an organic film with light-emitting properties. When a DC voltage is applied, holes will be injected from the anode and electrons will be injected from the cathode. The potential difference caused by the location causes carriers to move in the film and cause recombination, and part of the energy released by the electron hole recombination will excite the light-emitting molecules to form a single excitatory molecule. When a single exciton molecule releases energy to return to the ground state, a certain proportion of the energy will be emitted in the form of photons and j emits light. This is the principle of light emission of organic electro-optic light elements. In addition, in order to protect the organic electro-excitation light-emitting elements on the organic electro-luminescence display panel from external moisture and oxygen, the organic electro-luminescence display panel is usually subjected to an encapsulation process to make metal or glass materials.

1233667 Description ⑵ On the panel, the cover plate to provide protection is bonded to the organic electroluminescence light display. 〇 Please refer to Figure ^ ~ 丨!) And Figure 2, which are shown in order of ~ 11} A schematic diagram of a packaging process of an organic electroluminescent display panel is known, and it is shown as a flowchart of the packaging process of FIGS. 1A to 1D. First, as shown in FIG. 1A, a sealant 130 is formed on the organic electroluminescence display panel 12o (step 202). The organic electroluminescent display panel 120 has, for example, a display area 120a, and a plurality of organic electroluminescent light elements 122 are arranged in the display area 120a. The frame adhesive 13o surrounds the display area 120a. periphery. Next, as shown in FIG. 1B, a cover plate 110 is provided, and a desiccant 112 is formed on the cover plate 110 (step 2_04). Then, as shown in FIG. Ic, the cover plate 11 () and the organic electroluminescent display panel 120 are aligned and pressed, so that the cover plate 11 () is bonded to the organic electroluminescent display panel 12 via the frame adhesive 13 (). O (step 206). Thereafter, as shown in FIG. 1D, the organic electro-excitation light display panel 120 is fully irradiated with ultraviolet rays (uv) to cure the frame adhesive 13 (step 208). However, because of the conventional UV curing

In the process of curing), the comprehensiveness of the organic electroluminescent display panel = irradiation (as shown in Figure 1D), so the organic June functional materials in the organic electroluminescent device may be Degradation (degradati ο η) caused by the irradiation of Tali ultraviolet rays will degrade the performance of the organic electroluminescent device during the manufacturing process, and thus shorten the life of the organic electroluminescent display panel (life ~ time).

Page 91233667 V. Description of the invention (3) Summary of the invention In view of the organic electroluminescence performance of the light display panel, the present invention uses a photomask as an element, and the electro-mechanical excitation light display is based on the seal of the above display panel. The organic electric region is configured by, for example, an excitation light display surface which is bonded to a peripheral frame adhesive of the display region by a frame adhesive for an ultraviolet light transmitting region and a light-shielding adhesive. In the present invention, the cover sheet is advanced ', for example, a water-absorbent material. Based on the above-mentioned packaging process of the present invention, the excitation light element promotes organic electricity. Another purpose is to cover the screen, so as to avoid the process of holding the electromechanical display panel or other purposes. The excitation light display has multiple organic plates or a cover. Board to organic electrical stimulation. Then, the line is cured, and its system corresponds to the purpose of providing a positive cover with a direct frame of plastic glue line on the display surface of the machine by using a light to maintain the excitation light to avoid the use of a curing process for the electrically excited light plate. Irradiation efficiency, providing a long life of UV-free light emitting elements. The present invention proposes organically used in an organic electro-luminescence display, such as a panel. An adhesive is formed on the electro-luminescence element. The light-emitting display provides a middle reticle display area, electro-mechanical excitation, and the positive life of the ultraviolet direct element. It is used to make the electro-excitation light and enhance the electro-excitation light display panel, and display it in the organic electricity and surround the cover plate with a glue to surround a display area. First of all, . Next, the frame and the photomask 4 with the photomask as the screen, for example, has a light-shielding area and a light-transmitting area corresponding to the frame of the organic electroluminescent display panel in the packaging process. Adhesive for bonding to the organic electroluminescent display panel on the cover or the organic electroluminescent display panel for one or other purposes, the present invention further provides a frame adhesive curing system

13527twf.ptd Page 10 1233667

It is applicable to the packaging structure of an organic electroluminescent display panel, wherein the packaging structure of the organic electroluminescent display panel includes, for example, a cover plate, an organic electroluminescent display panel, and a frame adhesive. The organic electroluminescent display panel has a display area, and for example, a plurality of organic electroluminescent light elements are arranged in the display area. In addition, the frame adhesive is arranged between the cover plate and the organic electroluminescent display panel, and surrounds the display area. The frame adhesive curing process of the present invention provides a photomask, and the photomask is used for UV curing of the frame adhesive, wherein the photomask has, for example, a light-shielding area and a light-transmitting area, and the light-shielding area corresponds to the display. Area, and the light-transmitting area corresponds to the frame. 〇Based on the above-mentioned 'the packaging process of the organic electroluminescent display panel of the present invention and the curing process of the polar adhesive are UV curing of the frame adhesive by using a photomask as a mask', wherein the light shielding area of the photomask can avoid direct UV irradiation. The organic electroluminescence light-emitting element on the organic electroluminescence display panel can reduce the consumption of the electromechanical light-excitation elements, thereby extending the service life of the organic electroluminescence display panel. So that the above and other objectives, features, and advantages of the present invention can be made clearer. "蓳" The following describes a preferred embodiment, in conjunction with the accompanying drawings, for detailed implementation.

3A to 3D and FIG. 4 at the same time, wherein FIGS. 3A to 3D sequentially show the packaging process f ′ of an organic electroluminescent display panel of the present invention, and FIG. 4 depicts the organic electroexcitation of the present invention. Clean drawing of the packaging process of the light display panel. First, as shown in FIG. 3A, an organic electroluminescence display panel 3 2〇

Page 11 1233667 (5) " " ~ '1 forms a frame glue 330 (step 402). The organic electroluminescent display panel 320 is, for example, one of a plurality of uncut organic electroluminescent display panels formed on a glass substrate (not shown), or may be an independent organic electroluminescent light after cutting. Display panel. In addition, the organic electroluminescent display panel 320 has, for example, a display area 32oa, and a plurality of organic electroluminescent devices 3 2 2 are disposed in the display area 32 0 & The periphery of the display area 320a. / Next, as shown in FIG. 3B, a cover plate 31 is provided, and a water absorbing material 31 2 is formed on the cover plate 31 () (step 4 04). Among them, the material of the water-absorbing material 31 2 is, for example, alumina (A1 2 0 3), and the purpose of forming the water-absorbing material 31 2 is to “absorb the infiltration from the external environment into the packaging structure or originally exist in the packaging structure. In addition, the cover 3 1 〇 is, for example, a glass substrate or a metal substrate, and the method for forming the water absorbing material 3 1 2 is, for example, spin coating or applying the water absorbing material 3 1 2 to the cover by a gluing method. Then, as shown in FIG. 3C, the cover plate 3 10 and the organic electroluminescent display panel 280 are aligned and pressed so that the cover plate 31o is bonded to the organic electroluminescent display panel via the frame adhesive 33o. 320 (step 40 6). Then, as shown in FIG. 3D, a photomask 34o is provided, and the photoresist 3 30 is cured with ultraviolet light using the photomask 34o as a mask (step 408). The cover 340 has, for example, a light-transmitting substrate 342, whose material is, for example, quartz, and the light-transmitting + base 34 2 is formed with an opaque film 344, for example, chromium (Cr) or chromium oxide (CrO). The film 344 constitutes a light-shielding area 340a 'corresponding to one of the display areas 320a and a light-shielding area 340a' other than the light-shielding area 340a. 34〇b region corresponding to the 3 2 0 a periphery of the sealant 330 and the other region of the display region. Thus

1233667 V. Description of the invention (6) Once UV curing is performed with the photomask 34 0 as the veil, part of the light will pass through the light transmission area 3 4 0 b and shine on the frame rubber 3 3 0 'and another Part of the light directed at the display area 320a will be blocked by the light-shielding area 340a, and the organic electro-optical light element 3 2 2 in the display area 3 2 0 a may be prevented from being directly irradiated with ultraviolet rays. It is worth mentioning that the packaging process of the organic electroluminescent display panel described above is for example only, and is not intended to limit the present invention. In other embodiments of the present invention, a frame glue may be formed on the cover plate instead, and the water-absorbing material may be selectively formed on the organic electroluminescent display panel and / or the cover plate, and the frame glue may be formed. There is no fixed sequence for the steps of forming the water-absorbing material. However, the detailed process steps are similar to the above-mentioned embodiments, so the details are not repeated. The invention uses a light-display surface to absorb water, wherein when the light-absorbing display panel and the water-absorbing material water-removing agent are cured by ultraviolet rays, the above-mentioned ultraviolet rays can be used directly. At the same time, when the material is processed, the shape of the plastic curing cover as the material on the board can be heat-cured or the water-cured material can be heated before the cover is joined. When the ultraviolet curing type is used, it can be cured by curing ultraviolet rays, or it can be different. Of course, a UV mask for the water-absorbing material is used as a mask to avoid organic electro-excitation. During the process of ultraviolet curing of the packaging plate of the organic electroluminescent display panel, the ultraviolet light is directly irradiated to the organic electroluminescent light-emitting element, thereby causing the organic electroluminescent light element.

丄 233667

V. Description of the invention (7) :: 2 attrition. Through the private and frame adhesive curing process of the present invention, the conventional packaging efficiency of the electro-mechanical excitation light display panel can be improved during the manufacturing process, so as to improve the service life of the positive plate of the organic electrical excitation light element during the process. , And then extend the organic electroluminescent display surface :: The present invention has been disclosed as above in a preferred embodiment, but it is not intended to limit the understanding. Anyone skilled in this art will not depart from the spirit of the present invention # 田 j 1 下J Hui's changes and retouching, therefore, the protection of the present invention is subject to the definition of the scope of the patent application attached.

1233667 Brief description of the drawings --- Figure 1 A ~ 1 D sequentially depict the packaging process of an organic electroluminescent display panel which is not a conventional one. FIG. 2 is a flowchart of the packaging process of FIGS. 3A to 3D are schematic diagrams illustrating a packaging process of an organic electroluminescent display panel according to the present invention in sequence. FIG. 4 is a flowchart illustrating a packaging process of an organic electroluminescent display panel according to the present invention. [Illustration of Graphical Symbols] • 110 112 120 120a 122 Cover plate absorbent organic electroluminescence light display panel display area organic electroluminescence light element 1 3 0: frame rubber 31 0: cover plate 312: absorbent material 320: organic electroluminescence light Display panel 3 2 0a: Display area 3 2 2: Organic electro-optical light element 3 3 0: Frame adhesive 340: Photomask 3 4 0 a

13527twf.ptd page 15 1233667 Simple illustration of the diagram 344 · film i ΙΙΙΒΙΙΙ 13527twf.ptd page 16

Claims (1)

1233667 VI. Scope of patent application1. A packaging process for an organic electroluminescent display panel is suitable for an organic electroluminescent display panel, wherein the organic electroluminescent display panel has a display area, and multiple display areas are arranged in the display area. Organic electroluminescence light emitting element 'The packaging process of the organic electroluminescence light emitting display panel includes: forming a frame adhesive on the organic electroluminescence light emitting display panel, wherein the frame glue surrounds the display area; a cover plate Bonded to the organic electroluminescent display panel via the frame adhesive; and • providing a photomask, and using the photomask as a mask to perform UV curing of the frame adhesive 'wherein the photomask has a light-shielding area and a light transmission The light shielding area corresponds to the display area, and the light transmitting area corresponds to the frame. 2 · The encapsulation process of the organic electroluminescent display panel as described in item 丨 of the application, wherein the cover is further included in the cover before the cover is bonded to the organic electroluminescent display panel via the frame adhesive. A water-absorbing material 0 3 is formed on the packaging process of the 4 electromechanical excitation light display panel as described in item 1 of Shen Qing's patent scope, wherein the cover plate is bonded to the organic electroluminescence light display panel through the frame adhesive. Before, the method further includes forming a water-absorbing material on the organic electroluminescent display panel. a 4 · The packaging process of the organic electroluminescent display panel as described in item 1 of the Shenjing patent scope, wherein the material of the photomask includes quartz. 5. The packaging process of the organic electroluminescent display panel as described in item 1 of the scope of patent application, wherein the material of the light-shielding area includes metal. 6 · Packaging process for organic electroluminescent display panel, suitable for 13527twf.ptd Page 17Ϊ233667 6. Scope of patent application: electromechanical excitation light display panel, wherein the organic electroluminescence light display panel has a display area, and a plurality of organic electroluminescence light elements are arranged in the display area. The encapsulation process of the excitation light display panel includes: providing two cover plates, and forming a frame adhesive on the cover plate; bonding the cymbal cover plate to the organic electroluminescent display panel through the frame adhesive, and the frame adhesive in f Is provided around the display area; and an f-mask is provided and the frame is cured with ultraviolet light by using the photomask as a mask, wherein the photomask has a light-shielding area and a light-transmitting area, and the light-shielding area corresponds to The display area and the light transmission area correspond to the frame rubber. 7. The packaging process of the organic electroluminescent display panel as described in item 6 of the patent claim, wherein before the cover is bonded to the organic electroluminescent display panel via the frame adhesive, it is further included in the cover. A water-absorbing material is formed on the board. The packaging process of the organic electroluminescent display panel described in item 6 of the patent application scope, wherein before the cover is bonded to the organic electroluminescent display panel via the frame adhesive, It further includes forming a water-absorbing material on the organic electroluminescent display panel. 9. The packaging process of the organic electroluminescent display panel as described in item 6 of the scope of patent application, wherein the material of the photomask includes quartz. 10 · The packaging process of the organic electroluminescent display panel as described in item 6 of the scope of patent application, wherein the material of the light-shielding area includes metal. Π · — A kind of frame adhesive curing process, suitable for the packaging structure of an organic electroluminescent display panel, wherein the packaging structure of the organic electroluminescent display panel includes a cover plate, an organic electroluminescent display panel, and a frame adhesive, The 13527twf.ptd Page 18 1233667 6. Patent application scope Organic electroluminescence display panel has a display area, and a plurality of organic electroluminescence components are arranged in the display area, and the frame adhesive is arranged on the cover and the cover. Between the organic electroluminescence display panels and around the display area, the frame adhesive curing process includes: providing a photomask, and using the photomask as a mask to perform ultraviolet curing on the frame adhesive, wherein the photomask There is a light-shielding area and a light-transmitting area, the light-shielding area corresponds to the display area, and the light-transmitting area corresponds to the frame adhesive. 1 2. The frame adhesive curing process according to item 11 of the scope of patent application, wherein the material of the photomask includes quartz. 1 3. According to the frame adhesive curing process described in item 11 of the scope of patent application, the material of the light-shielding area in n includes metal. 13527twf.ptd Page 19