TW200539396A - 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

200539396 V. Description of the invention (1) Field of invention The invention relates to a packaging process of a panel and a curing method of a frame adhesive ', and particularly to a packaging process of an organic electroluminescent display panel and a frame adhesive. Curing process. With the advancement of information technology in the past, 'a variety of information equipment is constantly being developed.' In the display market, Flat Panel Display (FPD) has the characteristics of thinness, weight reduction and power saving. Is gradually gaining popularity. Among various flat-panel displays, Organic Electroluminescent Display (OLED) has advantages such as self-luminous, wide viewing angle, high response speed, low driving voltage, full color, etc., so it is very suitable for electronic clocks, mobile phones, Applications for displays such as personal digital assistants and digital cameras. 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 are injected from the anode (⑽㈨ /) and electrons are injected from the cathode (cathode). The potential difference caused by the location causes carriers (carr ier) to move in the film and 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 excited state returns to the: ground state, a certain proportion of energy will be released in the form of photons :: # Luminescence, which is the principle of light emission of organic electro-excitation light elements. > In addition, in order to protect the organic electro-excitation on the organic electro-excitation light display panel | ί ΐ It inside Γ is attacked by external moisture and oxygen, usually an organic electro-excitation display panel is subjected to a packaging process to Metal material or glass material 13527twf.ptd Page 8 200539396 V. Description of the invention (2) The cover plate is bonded to the organic electroluminescent display panel to provide protection. Please refer to FIGS. 1A to 1D and FIG. 2 at the same time, wherein FIGS. 1A to 1D are sequentially illustrated as a conventional packaging process of an organic electroluminescent display panel, and FIG. 2 is a packaging process of FIGS. 1 A to 1 D Flowchart. First, as shown in FIG. 1A, a sealant 130 is formed on the organic electroluminescent display panel 120 (step 202). Among them, organic electricity

The excitation light display panel 120 has, for example, a display area 120a, and a plurality of organic electrical excitation light elements 122 are arranged in the display area 120a. A frame 130 surrounds the periphery of the display area 120a. Next, as shown in FIG. A, a cover plate 110 'is provided and a desiccant H2 is formed on the cover plate 110 (step 204). Then, as shown in FIG. Ic, the cover 110 and the organic electroluminescent display panel 120 are aligned and pressed, so that the cover 110 is bonded to the organic electroluminescent display panel 120 via the frame adhesive 130 (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 130 (step 208).

However, 'because it is known that in the process of UV curing of the frame adhesive, the organic electroluminescent display panel is irradiated comprehensively (as shown in FIG. 1D). Organic 5% organic functional materials may be degraded on the basis of a large amount of ultraviolet radiation. ° In this way, the efficiency of organic electro-optical light emitting elements will be lost during the manufacturing process, and Therefore, the service life (1 fe-1 ime) of the organic electroluminescent display panel is shortened.

13527twf.ptd Page 9 200539396 V. Description of the invention (3) Summary of the invention ^ In view of this, the purpose of the present invention is to provide a packaging process for organic electro-excitation light display panels, which avoids ultraviolet rays through a photomask Straight, according to the organic electroluminescent device, to maintain the positive effect of the organic electroluminescent device, thereby increasing the service life of the organic electroluminescent display panel. Another object of the present invention is to provide a frame adhesive curing process, which uses a photomask as a mask to prevent ultraviolet rays from directly irradiating the organic electroluminescent element, thereby maintaining the normal performance of the organic electroluminescent element, and improving the organic electroluminescent element. Electromechanical · Excitation light display panel life. Based on the above or other objectives, the present invention provides a packaging process for an organic electroluminescent display panel, which is suitable for an organic electroluminescent display panel, wherein the organic electroluminescent display panel has, for example, a display area, and the display area For example, a plurality of organic electroluminescent elements are arranged. First, a frame adhesive is formed on the organic electroluminescent display panel or a cover plate. Next, the cover plate is bonded to the organic electroluminescent display panel via a frame adhesive, wherein the frame adhesive surrounds the display area. Then, a photomask is provided, and the photoresist is cured by using the photomask as a mask. The photomask has, for example, 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 display area. In the packaging process of the organic electroluminescence display panel of the present invention, the parameters are described in the reference. Before the cover is bonded to the organic electroluminescence display panel via a frame adhesive, it can be placed on the cover or the organic electroluminescence light. A water-absorbing material is formed on the display panel. Based on the above or other objectives, the present invention further provides a frame adhesive curing system.

13527twf.ptd Page 10 200539396

It is suitable for the sealing of an organic electro-excitation organic light-emitting display panel, and an electro-mechanical-excitation light display panel and-having a display area and elements in the display area. In addition, the frame adhesive is disposed between and surrounds the periphery of the display area to provide a photomask, and the photomask is used as the photomask, for example, the photomask has a light-shielding area in the display area, and the light-transmitting area corresponds to the above. The process and curing process of the frame adhesive of the present invention are cured by an external line, in which the service life of the panel is lost due to the low organic electroluminescent element on the organic electroluminescent display panel of the photomask. In order to make the above and obvious aspects of the present invention comprehensible, specific preferred implementations are described below. Embodiments The packaging structure of a light display panel includes a cover plate and a frame adhesive, for example. The organic electroluminescence display panel is configured with, for example, a plurality of organic electroluminescence cover plates and an organic electroluminescence display panel. The frame adhesive curing process of the present invention is that the mask performs UV curing on the frame adhesive, and a light-transmitting area, and the light-shielding area corresponds to the frame adhesive. The packaged photomask of the electromechanical excitation light display panel is used as a cover to cover the frame with a purple light-shielding area, which can prevent ultraviolet rays from directly irradiating the organic electrical excitation light element, so it can be reduced, thereby extending the organic electrical excitation light to display his purpose, characteristics, and advantages. Can be more clear, and in accordance with the drawings, please refer to Figures 3A ~ 3D and Figure 4 for detailed tunes. ^ Hole ~ Chuan sequentially shows the figure j, the packaging process of the two-electron excitation light display panel 丨, and FIG. 4 is a flowchart of the organic electroluminescent display of the present invention; 51 exhibition First, as shown in Figure 3A

13527twf.ptd on an organic electroluminescent display panel 320

Page 11 200539396

A frame glue 330 is formed thereon (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 320a, and a plurality of organic electroluminescent devices 322 are disposed in the display area 32a, for example, and the frame adhesive 33o surrounds the display area 320a. periphery. Next, as shown in FIG. 3B, a cover plate 31o is provided, and a water-absorbing material 312 is formed on the cover plate 31o (step 4 04). Among them, the material of the water absorbing material 312 is, for example, oxide (A1 203), and the purpose of forming the water absorbing material 312 is to absorb moisture that has penetrated into the packaging structure from the external environment or originally exists inside the f-packing structure. In addition, the cover plate 3 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 2 to the cover plate by a glue injection method. Then, as shown in FIG. 3C, the cover plate 310 and the organic electroluminescent display panel 320 are aligned and pressed, so that the cover 31o is bonded to the organic electroluminescent display panel 320 via the frame adhesive “ο (step 40 6). For example, an opaque film 344 is formed on the substrate 342, and the material is, 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 blocks light. A light-transmitting area 34ob other than the area 340a corresponds to the frame rubber 330 and other areas around the display area 320a.

Thereafter, as shown in FIG. 3D, a photomask 340 is provided, and the photoresist 3 30 is cured with ultraviolet light by using the photomask 340 as a mask (step 408). The photomask 340 has, for example, a light-transmitting substrate 342, and the material is, for example, quartz and is transparent.

13527twf.ptd Page 12 200539396 V. Description of the invention (6) ------ Once, when UV curing is performed with the photomask 34 0 as the mask, part of the light will be irradiated to the light transmission area 34 Ob The light on the sealant 330 and the other part directed at the display area 3203 will be blocked by the light-shielding area 34a, and the organic electrical excitation light element 32 in the display area 320a can be prevented from being directly irradiated. I. Wing Old • It is worth mentioning that the packaging system 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 is optionally formed on the organic electroluminescent display panel and / or the cover plate, and the frame is formed. There is no fixed sequence for the steps of glue or water-absorbing material formation, but the detailed process steps are similar to the above embodiments, so the details are not repeated.

^ In addition, the type of the water-absorbing material of the present invention may be, for example, a thermosetting type or an ultraviolet curing type. When the water-absorbing material is a thermosetting type, a heating method may be performed before the cover plate and the organic electroluminescent display panel are joined. Step to cure the water-absorbing material; and if the water-absorbing material is UV-curable, the water-repellent agent can be cured by ultraviolet curing while the frame is cured, or the water-absorbing material can be cured by ultraviolet. Of course, when the water-absorbing material is UV-cured, the above-mentioned photomask can also be used as a screen to prevent the organic electroluminescent light-emitting element from being directly irradiated with ultraviolet rays. In summary, the packaging process of the organic electroluminescent display panel and the curing process of the frame adhesive of the present invention use a photomask as a cover during the process of ultraviolet curing of the panel, so as to prevent ultraviolet rays from directly irradiating the organic electroluminescent display panel. Organic electrical excitation light element

13527twf.ptd Page 13 200539396 V. Description of the invention (7) Wear of parts. With the organic mine of the present invention, the packaging process and the curing process of the RGB light-emitting display panel can be maintained at φ ## ^ ^ ^ = The positive effect of this method is to improve the yield of the Nanan process, thereby extending the life of the organic electroluminescent display panel. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the scope of the present invention. Therefore, the present invention I 巳 Wai shall be determined as defined in the scope of the attached patent application. ,,

13527twf.ptd Page 14 200539396 Brief description of the diagrams Figures 1 A ~ 1 D sequentially show the packaging process of a conventional organic electroluminescence display panel. FIG. 2 is a flowchart of the packaging process of FIGS. 1A to 1D. 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] 11 0: Cover 11 2: Water-absorbing material 1 2 0: Organic electroluminescence display panel 1 2 0 a: Display area 1 2 2 · • Organic electroluminescence light element 1 3 0: Frame adhesive 3 1 0: cover 3 1 2: water absorbing material 3 2 0: organic electroluminescent display panel 3 2 0a: display area 32 2: organic electroluminescent device 3 3 0: frame adhesive 34 0 • photomask 340a: light shielding Zone 3 4 0 b · Transparent zone 3 4 2 · Transparent substrate

13527twf.ptd Page 15 200539396 Schematic illustration 344: Film

US! 13527twf.ptd page 16

Claims (1)

200539396 VI. Scope of patent application1. An organic electroluminescence display panel is a packaging process suitable for an organic electroluminescence display panel, in which the organic tape, red government panel & — ^ Λ β ^ ^ ^ ^ ^ The electromechanical excitation light display panel has a display area, and the display area is provided with a Jia Shibian & A ^ f 々τ β _ 'one organic electrical excitation light element, the organic electrical excitation light display panel The packaging process includes: forming an adhesive on the organic electroluminescent display panel; wherein the frame adhesive surrounds the display area; and a cover plate is 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-transmitting area, and the light-shielding area corresponds to the display area' and the light-transmitting The optical system is better than $ frame glue. 2 · The packaging process of the organic electroluminescent display panel according to item 1 of the scope of patent 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 is formed thereon. As described in item 1 of the scope of the patent application, there is an encapsulation process of an electro-mechanical excitation light display panel, wherein before the cover is bonded to the organic electro-luminescence display panel via the frame adhesive, 'It further includes forming a water-absorbing material on the organic electroluminescent display panel. 4. The packaging process of the organic electroluminescent display panel according to item 1 of the scope of patent application, 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 · —A kind of packaging process for organic electro-excitation light display panel, suitable for 200539396 VI. Patent application scope Organic electroluminescence light-emitting display panel J Where there is-display area and the display area is provided with a piece J The organic electroluminescence light-emitting display panel provides a cover and passes the cover on the cover The frame adhesive is a bonding board in which the frame adhesive is provided around the display-the photomask 9 is cured with the photomask J wherein the photomask has a light-shielding area pair * 1 ^ in the display area > and the transparent The light area frame adhesive ht Ϊ ΪPlease refer to the organic electro-excitation light display surface V- * xr \ described in the patent scope item No. 6 before forming a water absorption process on the cover plate, in which the cover plate passes the The frame adhesive is bonded to the organic electroluminescence display panel X 'material. • The encapsulation process of the organic electroluminescent display surface as described in item 6 of the patent scope of the patent, wherein before the cover is bonded to the electroluminescent display panel through the frame adhesive, it is further included in the organic electroluminescent display panel. A water-absorbing material is formed on the electromechanical excitation light 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 organic electro-excitation light display surface described in item 6 of the scope of the patent application, and the encapsulation process, wherein the material of the light-shielding area includes metal. 11 · A frame adhesive curing process, suitable for sealing and structure of an organic electroluminescent display panel, wherein the packaging junction of the organic electroluminescent display panel includes a cover plate, an organic electroluminescent display panel and a frame Glue, the Page 18, 200539396 6. Patent application scope The organic electroluminescent display panel has a display area, and the display system has a plurality of organic electroluminescent devices, and the frame adhesive system is arranged in the ring, and the organic electroluminescent light The display panel curing process includes: 济 ultraviolet light provides a photomask, and the photomask is used as a mask to make the frame left and cured, 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 · If the frame adhesive curing process described in item 11 of the patent application scope of the patent, the material of the photomask in the government includes quartz. 〃 13 · The frame adhesive curing process according to item 11 of the scope of patent application, wherein the material of the light-shielding area includes metal. 13527twf.ptd Page 19