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JP2013258006A - Manufacturing method of display panel - Google Patents

Manufacturing method of display panel Download PDF

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JP2013258006A
JP2013258006A JP2012132733A JP2012132733A JP2013258006A JP 2013258006 A JP2013258006 A JP 2013258006A JP 2012132733 A JP2012132733 A JP 2012132733A JP 2012132733 A JP2012132733 A JP 2012132733A JP 2013258006 A JP2013258006 A JP 2013258006A
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glass
welding rod
sealing lid
concave groove
glass substrate
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JP5514263B2 (en
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Masazumi Ikegami
正純 池上
Kaname Nakamura
要 中村
Makoto Kamimura
誠 上村
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SHIN-NIPPON STAINLESS INDUSTRY CO Ltd
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SHIN-NIPPON STAINLESS INDUSTRY CO Ltd
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Abstract

【課題】簡単な作業で、封止蓋とガラス基板との周縁部に沿った接合力を一定にすることができる表示パネルの製造方法を提供する。
【解決手段】本発明による表示パネル１の製造方法は、ガラス基板３の周縁部４１に凹溝１７を形成し、断面円形状の長尺状に形成されると共に、前記封止蓋５およびガラス基板３よりも融点が低く、レーザー光４５の照射によって溶融可能なガラス溶接棒７を前記凹溝１７に沿って配置し、レーザー光４５を前記ガラス溶接棒７に照射し、ガラス溶接棒７を溶融させて前記凹溝１７内に収容したのち固化させることにより、前記封止蓋５の周縁部を、ガラス基板３の周縁部４１に密着させた状態で接合する方法である。
【選択図】図５Provided is a display panel manufacturing method capable of making a bonding force along a peripheral edge between a sealing lid and a glass substrate constant by a simple operation.
A method of manufacturing a display panel according to the present invention includes forming a concave groove 17 in a peripheral edge portion 41 of a glass substrate 3 to form an elongated shape having a circular cross section, and the sealing lid 5 and glass. A glass welding rod 7 having a melting point lower than that of the substrate 3 and meltable by the irradiation of the laser beam 45 is disposed along the concave groove 17, the laser beam 45 is irradiated to the glass welding rod 7, and the glass welding rod 7 is In this method, the peripheral edge of the sealing lid 5 is bonded to the peripheral edge 41 of the glass substrate 3 by being melted and accommodated in the concave groove 17 and then solidified.
[Selection] Figure 5

Description

本発明は、有機エレクトロルミネッサンス素子を載置したガラス基板の周縁部にガラス製の封止蓋の周縁部を接合して得られる表示パネルの製造方法に関する。   The present invention relates to a method for manufacturing a display panel obtained by joining a peripheral portion of a glass sealing lid to a peripheral portion of a glass substrate on which an organic electroluminescent element is placed.

従来から、薄型のフラットディスプレイパネルとして有機エレクトロルミネッサンス（以下、「ＥＬ」とも記載する）素子を用いた有機ＥＬパネルが実用化されるようになっている。有機ＥＬ素子は、例えば、封止蓋とガラス基板とで封止されている。   Conventionally, an organic EL panel using an organic electroluminescence (hereinafter also referred to as “EL”) element has been put to practical use as a thin flat display panel. The organic EL element is sealed with, for example, a sealing lid and a glass substrate.

前記有機ＥＬ素子には発光材料に有機材料が使用されており、この有機材料は水分を含むと寿命が短くなる。従って、封止蓋とガラス基板とで有機ＥＬ素子を封止し、この封止部分の気密性を向上させたり、封止蓋の内側に乾燥剤を取り付けたりしている（例えば、特許文献１参照）。   In the organic EL element, an organic material is used as a light emitting material, and the lifetime of the organic material is shortened when it contains moisture. Therefore, the organic EL element is sealed with the sealing lid and the glass substrate, and the airtightness of the sealed portion is improved, or a desiccant is attached to the inside of the sealing lid (for example, Patent Document 1). reference).

特開２０１０−２２８９９８号公報JP 2010-228998 A

しかしながら、前記従来技術においては、封止蓋とガラス基板との周縁部同士を接合する封着用ガラス材料として、粉末材料を溶剤に溶かしたペーストを用いるため、周縁部に沿った部位で、ガラス材料の量がばらつくことに起因して接合力もばらつきを生じるという問題があった。   However, in the prior art, since a paste in which a powder material is dissolved in a solvent is used as the sealing glass material for joining the peripheral portions of the sealing lid and the glass substrate, the glass material is used at the site along the peripheral portion. There is a problem that the bonding force also varies due to the variation in the amount of copper.

また、封着用ガラス材料は、前記ペーストを封止蓋の溝に充填したのち乾燥させて塗布層を形成し、該塗布層を焼成して封着材料層にする工程を含むため、接合作業が面倒になるという問題もあった。   The sealing glass material includes a step of filling the paste in the groove of the sealing lid and then drying to form a coating layer, and firing the coating layer to form a sealing material layer. There was also the problem of becoming troublesome.

そこで、本発明は、簡単な作業で、封止蓋とガラス基板との周縁部に沿った接合力を一定にすることができる表示パネルの製造方法を提供することを目的とする。   In view of the above, an object of the present invention is to provide a method for manufacturing a display panel capable of making the bonding force along the peripheral edge between the sealing lid and the glass substrate constant with a simple operation.

本発明に係る表示パネルの製造方法は、ガラス製の封止蓋の周縁部を、有機エレクトロルミネッサンス素子を載置したガラス基板の周縁部に接合することにより有機エレクトロルミネッサンス素子を収容した状態で封止する表示パネルの製造方法である。   The display panel manufacturing method according to the present invention is a state in which the organic electroluminescence element is accommodated by joining the peripheral edge of the glass sealing lid to the peripheral edge of the glass substrate on which the organic electroluminescence element is placed. It is the manufacturing method of the display panel sealed with.

前記封止蓋の周縁部およびガラス基板の周縁部のうち少なくともいずれかに凹溝を形成し、断面円形状の長尺状に形成されると共に、前記封止蓋およびガラス基板よりも融点が低く、レーザー光の照射によって溶融可能なガラス溶接棒を前記凹溝に沿って配置し、レーザー光を前記ガラス溶接棒に照射し、ガラス溶接棒を溶融させて前記凹溝内に収容したのち固化させることにより、前記封止蓋の周縁部を、ガラス基板の周縁部に密着させた状態で接合することを特徴とする。   A concave groove is formed in at least one of the peripheral portion of the sealing lid and the peripheral portion of the glass substrate, and is formed in a long shape with a circular cross section, and has a lower melting point than the sealing lid and the glass substrate. A glass welding rod that can be melted by laser light irradiation is disposed along the concave groove, and the glass welding rod is irradiated with laser light, and the glass welding rod is melted, accommodated in the concave groove, and then solidified. Thus, the peripheral portion of the sealing lid is bonded in a state of being in close contact with the peripheral portion of the glass substrate.

本発明に係る表示パネルの製造方法によれば、封止蓋およびガラス基板の周縁部に沿ったガラスの量が一定となりバラツキが小さくなるため、周縁部に沿った接合力も一定となる。   According to the method for manufacturing a display panel according to the present invention, the amount of glass along the peripheral edge of the sealing lid and the glass substrate is constant and variation is reduced, so that the bonding force along the peripheral edge is also constant.

また、封止蓋の周縁部とガラス基板の周縁部との間に長尺状のガラス溶接棒を配置して溶融させるという簡単な作業で表示パネルを製造することができる。   Moreover, a display panel can be manufactured by a simple operation of disposing and melting a long glass welding rod between the peripheral edge of the sealing lid and the peripheral edge of the glass substrate.

本発明の第１実施形態による表示パネルの断面図である。1 is a cross-sectional view of a display panel according to a first embodiment of the present invention. 図１の分解斜視図である。FIG. 2 is an exploded perspective view of FIG. 1. 第１実施形態によるガラス基板を上方から見た平面図である。It is the top view which looked at the glass substrate by 1st Embodiment from upper direction. ガラス基板の凹溝にガラス溶接棒を載置した状態を示す平面図である。It is a top view which shows the state which mounted the glass welding rod in the ditch | groove of the glass substrate. （ａ）は図１の要部を示す拡大断面図、（ｂ）はガラス溶接棒にレーザー光を照射して溶融させた状態を示す断面図である。(A) is an expanded sectional view which shows the principal part of FIG. 1, (b) is sectional drawing which shows the state which irradiated and melt | dissolved the laser beam to the glass welding rod. 第１実施形態における第１変形例を示す要部の断面図であり、図５（ａ）に対応している。It is sectional drawing of the principal part which shows the 1st modification in 1st Embodiment, and respond | corresponds to Fig.5 (a). 第１実施形態における第２変形例を示す要部の断面図であり、図５（ａ）に対応している。It is sectional drawing of the principal part which shows the 2nd modification in 1st Embodiment, and respond | corresponds to Fig.5 (a). 本発明の第２実施形態による表示パネルの分解斜視図である。FIG. 6 is an exploded perspective view of a display panel according to a second embodiment of the present invention. （ａ）は図８の要部を示す拡大断面図、（ｂ）はガラス溶接棒にレーザー光を照射して溶融させた状態を示す断面図である。(A) is an expanded sectional view which shows the principal part of FIG. 8, (b) is sectional drawing which shows the state which irradiated and melted the laser beam to the glass welding rod. 第２実施形態における第１変形例を示す要部の断面図であり、図９（ａ）に対応している。It is sectional drawing of the principal part which shows the 1st modification in 2nd Embodiment, and respond | corresponds to Fig.9 (a). 第２実施形態における第２変形例を示す要部の断面図であり、図９（ａ）に対応している。It is sectional drawing of the principal part which shows the 2nd modification in 2nd Embodiment, and respond | corresponds to Fig.9 (a).

以下、本発明の実施形態を図面と共に詳述する。なお、図面において表示パネルを通常位置に配置した場合に、ＵＰは上方向、ＬＷＲは下方向、Ｌは長手方向、Ｗは短手方向を示すものとする。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawing, when the display panel is disposed at a normal position, UP indicates an upward direction, LWR indicates a downward direction, L indicates a longitudinal direction, and W indicates a lateral direction.

[第１実施形態]
まず、図１〜図５を用いて第１実施形態による表示パネル１を説明する。 [First embodiment]
First, the display panel 1 according to the first embodiment will be described with reference to FIGS.

図１，２に示すように、本実施形態による表示パネル１は、通常状態において下側に配置されたガラス基板３と、該ガラス基板３の上に配置される封止蓋５とを備え、これらのガラス基板３および封止蓋５同士を、ガラス溶接棒７を溶融させた溶融ガラス固化させて接合することによって得られる。前記封止蓋５およびガラス基板３の厚さは、例えば、０．５ｍｍ〜１．２ｍｍが好ましい。   As shown in FIGS. 1 and 2, the display panel 1 according to the present embodiment includes a glass substrate 3 disposed on the lower side in a normal state, and a sealing lid 5 disposed on the glass substrate 3. The glass substrate 3 and the sealing lid 5 are obtained by solidifying molten glass obtained by melting the glass welding rod 7 and joining them. As for the thickness of the said sealing lid 5 and the glass substrate 3, 0.5 mm-1.2 mm are preferable, for example.

前記封止蓋５は、断面コ字状に形成されており、平板状の天板部９と、該天板部９の周縁から下方に延びる側面部１１とから形成されている。前記天板部９の裏面には、表示パネル１の内部空間１３の湿気を除去する乾燥剤１５が貼着されている。   The sealing lid 5 is formed in a U-shaped cross section, and is formed of a flat top plate portion 9 and a side surface portion 11 extending downward from the periphery of the top plate portion 9. A desiccant 15 for removing moisture in the internal space 13 of the display panel 1 is attached to the back surface of the top plate portion 9.

前記封止蓋５の材質は、例えば、無機ガラス、ステンレス鋼、アルミニウム合金などが好ましい。   The material of the sealing lid 5 is preferably inorganic glass, stainless steel, aluminum alloy, or the like.

前記ガラス基板３の周縁部には、図２，３に示すように、平面視が矩形状の凹溝１７が形成されている。具体的には、図３に示すように、ガラス基板３は長手方向の長さが短手方向よりも長い長方形に形成されており、前記凹溝１７も、長手方向に沿った長手方向溝１９と、短手方向に沿った短手方向溝２１とからなる。そして、図４に示すように、長手方向溝１９には長い２本のガラス溶接棒２３を載置し、短手方向溝には短い２本のガラス溶接棒２５を載置する。   As shown in FIGS. 2 and 3, a concave groove 17 having a rectangular shape in plan view is formed on the peripheral edge of the glass substrate 3. Specifically, as shown in FIG. 3, the glass substrate 3 is formed in a rectangular shape whose length in the longitudinal direction is longer than that in the short side direction, and the concave groove 17 is also a longitudinal groove 19 along the longitudinal direction. And a lateral direction groove 21 along the lateral direction. As shown in FIG. 4, two long glass welding rods 23 are placed in the longitudinal groove 19, and two short glass welding rods 25 are placed in the short-side groove.

この凹溝１７は、図５（ａ）に示すように、断面が矩形状に形成されており、底面２７と該底面２７の両端から上方に向けて延びる側面２９，３１とから構成されている。また、凹溝１７の幅寸法は、断面円形状のガラス溶接棒７の径よりも小さく形成されている。例えば、凹溝１７の幅寸法は０．１ｍｍ〜０．８ｍｍが好ましく、ガラス溶接棒７の径は０．３ｍｍ〜１．０ｍｍが好ましい。これによって、ガラス溶接棒７は、封止蓋５の側面部１１の底面３３に対する接触部３４と、ガラス基板３の凹溝１７の上端角部３５，３７に対する接触部との３点で支持される。なお、凹溝１７の断面積は、ガラス溶接棒７の断面積と同一に設定されているため、ガラス溶接棒７が溶融した場合に、溶融ガラス３９（図５（ｂ）参照）の液面は、ガラス基板３の周縁部４１の表面と同じ液面高さとなる。また、ガラス基板３の凹溝１７の内周側には、有機ＥＬ素子４３が配設されている。この有機ＥＬ素子４３には発光材料に有機材料が使用されており、この有機材料は水分を含むと寿命が短くなる性質がある。   As shown in FIG. 5A, the concave groove 17 has a rectangular cross section, and includes a bottom surface 27 and side surfaces 29 and 31 extending upward from both ends of the bottom surface 27. . Moreover, the width dimension of the concave groove 17 is formed smaller than the diameter of the glass welding rod 7 having a circular cross section. For example, the width dimension of the concave groove 17 is preferably 0.1 mm to 0.8 mm, and the diameter of the glass welding rod 7 is preferably 0.3 mm to 1.0 mm. Accordingly, the glass welding rod 7 is supported at three points, that is, a contact portion 34 with respect to the bottom surface 33 of the side surface portion 11 of the sealing lid 5 and a contact portion with respect to the upper end corner portions 35 and 37 of the concave groove 17 of the glass substrate 3. The In addition, since the cross-sectional area of the concave groove 17 is set to be the same as the cross-sectional area of the glass welding rod 7, when the glass welding rod 7 is melted, the liquid level of the molten glass 39 (see FIG. 5B). Is the same liquid level as the surface of the peripheral edge portion 41 of the glass substrate 3. An organic EL element 43 is disposed on the inner peripheral side of the concave groove 17 of the glass substrate 3. The organic EL element 43 uses an organic material as a light emitting material, and this organic material has a property that its life is shortened when it contains moisture.

前記ガラス基板３の材質は、例えば、無アルカリガラス、白板ガラス、石英ガラス、ソーダガラス、サファイアガラスなどが好ましい。   The material of the glass substrate 3 is preferably non-alkali glass, white plate glass, quartz glass, soda glass, sapphire glass, or the like.

また、ガラス溶接棒７の材質は、例えば、低融点ガラスが好ましく、特に導電性バナジン酸塩ガラスが好ましい。   Moreover, the material of the glass welding rod 7 is preferably, for example, low melting point glass, and particularly preferably conductive vanadate glass.

次に、第１実施形態において、封止蓋５をガラス基板３に接合して表示パネル１を製造する手順を説明する。なお、以下の作業は、窒素等の不活性ガスを封入した図外のグローブボックスの内部で行うため、表示パネル１の内部空間１３には不活性ガスが充填される。   Next, a procedure for manufacturing the display panel 1 by bonding the sealing lid 5 to the glass substrate 3 in the first embodiment will be described. Since the following operation is performed inside a glove box (not shown) filled with an inert gas such as nitrogen, the internal space 13 of the display panel 1 is filled with the inert gas.

まず、図１、図２および図５（ａ）に示すように、ガラス基板３の凹溝１７に４本のガラス溶接棒７を載置する。このとき、前述したように、ガラス溶接棒７は、封止蓋５の側面部１１の底面３３に対する接触部と、ガラス基板３の凹溝１７の上端角部３５，３７との３点で支持される。   First, as shown in FIGS. 1, 2, and 5 (a), four glass welding rods 7 are placed in the concave grooves 17 of the glass substrate 3. At this time, as described above, the glass welding rod 7 is supported at the three points of the contact portion with respect to the bottom surface 33 of the side surface portion 11 of the sealing lid 5 and the upper corner portions 35 and 37 of the concave groove 17 of the glass substrate 3. Is done.

なお、本実施形態では、図２に示すように、４本の直線状のガラス溶接棒７を用いる形態を説明したが、例えば、平面視でＬ字状に屈曲したガラス溶接棒であっても良い。即ち、Ｌ字状のガラス溶接棒を４本用意し、ガラス基板３の凹溝１７に載置するようにしても良い。ここで、Ｌ字状のガラス溶接棒の材質は、前述した直線状のガラス溶接棒７と同一であることが好ましい。   In addition, in this embodiment, as shown in FIG. 2, although the form which uses the four linear glass welding rods 7 was demonstrated, even if it is a glass welding rod bent in L shape by planar view, for example good. That is, four L-shaped glass welding rods may be prepared and placed in the concave groove 17 of the glass substrate 3. Here, the material of the L-shaped glass welding rod is preferably the same as that of the linear glass welding rod 7 described above.

次いで、図１に示すように、ガラス基板３の凹溝１７に載置したガラス溶接棒７にレーザー光４５を照射すると、ガラス溶接棒７は溶融し、図５（ｂ）に示すように、溶融ガラス３９は凹溝１７内に充填されて、ガラス基板３の周縁部４１の表面と同じ液面高さとなる。   Next, as shown in FIG. 1, when the laser beam 45 is irradiated to the glass welding rod 7 placed in the concave groove 17 of the glass substrate 3, the glass welding rod 7 is melted, and as shown in FIG. The molten glass 39 is filled in the groove 17 and has the same liquid level as the surface of the peripheral edge portion 41 of the glass substrate 3.

そして、そのまま放置すると、溶融ガラス３９は固化してガラス基板３の周縁部４１の表面と封止蓋５の側面部１１の底面３３とを接合（結合）させる。   Then, if left as it is, the molten glass 39 is solidified to join (bond) the surface of the peripheral edge portion 41 of the glass substrate 3 and the bottom surface 33 of the side surface portion 11 of the sealing lid 5.

これによって、有機ＥＬ素子４３をガラス基板３と封止蓋５とで封止した表示パネル１が完成する。なお、前記レーザー光４５としては、例えば、波長が１０６４ｎｍのＹＡＧレーザーやＹＶＯ４レーザーなどが好ましい。 Thereby, the display panel 1 in which the organic EL element 43 is sealed with the glass substrate 3 and the sealing lid 5 is completed. The laser beam 45 is preferably, for example, a YAG laser or YVO 4 laser having a wavelength of 1064 nm.

以下に、第１実施形態による効果を説明する。   Below, the effect by 1st Embodiment is demonstrated.

（１）本実施形態による表示パネル１の製造方法は、ガラス基板３の周縁部４１に凹溝１７を形成し、断面円形状の長尺状に形成されると共に、前記封止蓋５およびガラス基板３よりも融点が低く、レーザー光４５の照射によって溶融可能なガラス溶接棒７を前記凹溝１７に沿って配置し、レーザー光４５を前記ガラス溶接棒７に照射し、ガラス溶接棒７を溶融させて前記凹溝１７内に収容したのち固化させることにより、前記封止蓋５の周縁部を、ガラス基板３の周縁部４１に密着させた状態で接合する方法である。 (1) The manufacturing method of the display panel 1 by this embodiment forms the ditch | groove 17 in the peripheral part 41 of the glass substrate 3, and is formed in the elongate shape of circular cross section, and the said sealing lid 5 and glass A glass welding rod 7 having a melting point lower than that of the substrate 3 and meltable by the irradiation of the laser beam 45 is disposed along the concave groove 17, the laser beam 45 is irradiated to the glass welding rod 7, and the glass welding rod 7 is In this method, the peripheral edge of the sealing lid 5 is bonded to the peripheral edge 41 of the glass substrate 3 by being melted and accommodated in the concave groove 17 and then solidified.

このように、本実施形態による有機ＥＬ素子の封止方法は、封止蓋５の周縁部とガラス基板３の周縁部４１との間に長尺状のガラス溶接棒７を配置し、このガラス溶接棒７を溶融させて固化させることによって、封止蓋５の周縁部とガラス基板３の周縁部４１とを接合する。従って、封止蓋５およびガラス基板３の周縁部４１に沿ったガラスの量が一定となりバラツキが小さくなるため、周縁部に沿った接合力も一定となる。   As described above, the method for sealing the organic EL element according to the present embodiment arranges the long glass welding rod 7 between the peripheral portion of the sealing lid 5 and the peripheral portion 41 of the glass substrate 3, and this glass. By melting and solidifying the welding rod 7, the peripheral portion of the sealing lid 5 and the peripheral portion 41 of the glass substrate 3 are joined. Accordingly, the amount of glass along the sealing lid 5 and the peripheral edge portion 41 of the glass substrate 3 is constant and the variation is reduced, so that the bonding force along the peripheral edge is also constant.

また、封止蓋５の周縁部とガラス基板３の周縁部４１との間に長尺状のガラス溶接棒７を配置して溶融させるという簡単な作業で封止作業を行うことができる。   Further, the sealing operation can be performed by a simple operation in which the long glass welding rod 7 is disposed and melted between the peripheral edge of the sealing lid 5 and the peripheral edge 41 of the glass substrate 3.

（２）前記封止蓋５の周縁部に配置された側面部１１の底面３３を平坦に形成し、ガラス基板３の周縁部４１の表面に凹溝１７を形成し、該凹溝１７に沿ってガラス溶接棒７を載置する。 (2) The bottom surface 33 of the side surface portion 11 disposed at the peripheral edge portion of the sealing lid 5 is formed flat, the concave groove 17 is formed on the surface of the peripheral edge portion 41 of the glass substrate 3, and along the concave groove 17. Then, the glass welding rod 7 is placed.

従って、ガラス基板３のみに凹溝１７を形成し、封止蓋５には凹溝を形成しないため、作業工程が簡略化できる。   Therefore, since the concave groove 17 is formed only in the glass substrate 3 and the concave groove is not formed in the sealing lid 5, the work process can be simplified.

（３）凹溝１７の断面形状を、ガラス溶接棒７の直径よりも幅寸法が小さい矩形状に形成した。 (3) The cross-sectional shape of the concave groove 17 was formed in a rectangular shape having a width dimension smaller than the diameter of the glass welding rod 7.

これにより、ガラス溶接棒７との接触点が、封止蓋の周縁部の底面に対する接触部３４と、凹溝１７の上端角部３５，３７との３点となり、ガラス溶接棒７の位置決めが良好となり、位置のバラツキがなくなる。   Thereby, the contact point with the glass welding rod 7 becomes three points of the contact portion 34 with respect to the bottom surface of the peripheral portion of the sealing lid and the upper end corner portions 35 and 37 of the concave groove 17, and positioning of the glass welding rod 7 is performed. It becomes good and there is no position variation.

[第１実施形態における第１変形例]
前述した凹溝の形状は、断面矩形状に限定されず、図６に示すように断面で円弧状に形成しても良い。 [First Modification of First Embodiment]
The shape of the concave groove described above is not limited to a rectangular cross section, and may be formed in an arc shape in cross section as shown in FIG.

具体的には、第１変形例による凹溝４７は、ガラス溶接棒７の断面の半径よりも大きな曲率半径を有する断面円弧状に形成されている。この場合も、凹溝４７の断面積は、ガラス溶接棒７の断面積と同一に設定されている。また、ガラス溶接棒７を、凹溝４７の底面と封止蓋５の周縁部の底面３３との間に挟持した場合、ガラス溶接棒７の上端４９は封止蓋５の周縁部の底面３３に当接し、ガラス溶接棒７の下端５１は凹溝４７の底面に当接する。このように、断面においては、ガラス溶接棒７は上下の２点で支持される。   Specifically, the groove 47 according to the first modification is formed in a circular arc shape having a radius of curvature larger than the radius of the cross section of the glass welding rod 7. Also in this case, the cross-sectional area of the concave groove 47 is set to be the same as the cross-sectional area of the glass welding rod 7. When the glass welding rod 7 is sandwiched between the bottom surface of the concave groove 47 and the bottom surface 33 of the peripheral portion of the sealing lid 5, the upper end 49 of the glass welding rod 7 is the bottom surface 33 of the peripheral portion of the sealing lid 5. The lower end 51 of the glass welding rod 7 is in contact with the bottom surface of the concave groove 47. Thus, in the cross section, the glass welding rod 7 is supported at two upper and lower points.

以下に、第１変形例による効果を説明する。   Below, the effect by a 1st modification is demonstrated.

（１）凹溝４７の断面形状を、ガラス溶接棒７の径よりも大きい曲率半径を有する円弧状に形成した。 (1) The cross-sectional shape of the concave groove 47 was formed in an arc shape having a radius of curvature larger than the diameter of the glass welding rod 7.

これにより、接合する断面積を大きくすることができる。具体的には、接合部の幅をガラス溶接棒の直径よりも大きくすることができる。このため、封止蓋５とガラス基板５３との接合力を大きくすることができる。   Thereby, the cross-sectional area to join can be enlarged. Specifically, the width of the joint can be made larger than the diameter of the glass welding rod. For this reason, the bonding force between the sealing lid 5 and the glass substrate 53 can be increased.

[第１実施形態における第２変形例]
前述した凹溝の形状は、断面矩形状または断面円弧状に限定されず、図７に示すように断面でＶ字状に形成しても良い。 [Second Modification of First Embodiment]
The shape of the concave groove described above is not limited to a rectangular cross section or a circular arc shape, and may be formed in a V shape in cross section as shown in FIG.

この場合も、ガラス基板５４における凹溝５５の断面積は、ガラス溶接棒７の断面積と同一に設定されている。また、ガラス溶接棒７を、凹溝５５の底面と封止蓋５の周縁部の底面３３との間に挟持した場合、ガラス溶接棒７の上端５７は封止蓋５の周縁部の底面３３に当接し、ガラス溶接棒７の下側は、下側接触部５９，６１を介して凹溝５５の底面に当接する。このように、断面においては、ガラス溶接棒７は上下の３点で支持される。   Also in this case, the cross-sectional area of the concave groove 55 in the glass substrate 54 is set to be the same as the cross-sectional area of the glass welding rod 7. Further, when the glass welding rod 7 is sandwiched between the bottom surface of the concave groove 55 and the bottom surface 33 of the peripheral portion of the sealing lid 5, the upper end 57 of the glass welding rod 7 is the bottom surface 33 of the peripheral portion of the sealing lid 5. The lower side of the glass welding rod 7 is in contact with the bottom surface of the groove 55 via the lower contact portions 59 and 61. Thus, in the cross section, the glass welding rod 7 is supported at the upper and lower three points.

以下に、第２変形例による効果を説明する。   The effects of the second modification will be described below.

（１）凹溝５５の断面形状をＶ字状に形成した。 (1) The cross-sectional shape of the concave groove 55 was formed in a V shape.

これにより、ガラス溶接棒７との接触点が、封止蓋５の周縁部の底面３３と、凹溝５５の底面との３点となり、ガラス溶接棒７の位置決めが良好となり、位置のバラツキがなくなる。また、凹溝５５の底面の２面だけ削れば良いため、矩形状の場合よりも凹溝５５の成形が容易になる。   Thereby, the contact point with the glass welding rod 7 becomes three points, that is, the bottom surface 33 of the peripheral edge of the sealing lid 5 and the bottom surface of the concave groove 55, the positioning of the glass welding rod 7 becomes good, and the position variation is large. Disappear. Moreover, since it is sufficient to cut only two surfaces of the bottom surface of the concave groove 55, the concave groove 55 can be formed more easily than a rectangular shape.

[第２実施形態]
次に、本発明の第２実施形態について説明するが、前述した第１実施形態と同一構成の部位には同一符号を付けて、説明を省略する。 [Second Embodiment]
Next, a second embodiment of the present invention will be described. The same reference numerals are given to the same components as those in the first embodiment described above, and the description will be omitted.

図８に示すように、第２実施形態による表示パネル７７は、第１実施形態の表示パネル１の配置方向を９０°回転させて上下方向に沿うように立て掛けて配置した状態で接合作業を行う。また、図９（ａ）に示すように、前記封止蓋６３の周縁部における底面６５および側面６７を含む角部を削ることによって断面Ｌ字状の切欠き６９を形成する。一方、この封止蓋６３の角部に対向するガラス基板７１の角部を削ることによって断面Ｌ字状の切欠き７３を形成する。そして、これらの切欠き同士６９，７３を突き合わせることによって、断面矩形状の凹溝７５を形成する。なお、この凹溝７５は、表示パネル７７の全周囲に亘って形成する。従って、ガラス溶接棒７もそれぞれの凹溝７５に対応させて配置する。   As shown in FIG. 8, the display panel 77 according to the second embodiment performs a joining operation in a state in which the display panel 1 according to the first embodiment is rotated by 90 ° and is leaned along the vertical direction. . Further, as shown in FIG. 9A, a notch 69 having an L-shaped cross section is formed by cutting corner portions including the bottom surface 65 and the side surface 67 at the peripheral edge portion of the sealing lid 63. On the other hand, a notch 73 having an L-shaped cross section is formed by cutting the corner of the glass substrate 71 facing the corner of the sealing lid 63. Then, a concave groove 75 having a rectangular cross section is formed by abutting these notches 69 and 73 together. The concave groove 75 is formed over the entire periphery of the display panel 77. Therefore, the glass welding rod 7 is also arranged corresponding to each concave groove 75.

つまり、図９（ａ）に示すように、封止蓋６３の切欠き６９は、封止蓋６３の側面６７に沿って延びる側部７９と、該側部７９に対して直交して延びる底部８１とから断面Ｌ字状に形成される。また、ガラス基板７１の切欠き７３は、ガラス基板７１の側面８３に沿って延びる側部８５と、該側部８５に対して直交して延びる底部８７とから断面Ｌ字状に形成される。そして、封止蓋６３の切欠き６９とガラス基板７１の切欠き７３を側部同士７９，８５の位置を合致させることによって、断面矩形状の凹溝７５を形成する。なお、この凹溝７５の断面積は、ガラス溶接棒７の断面積と同一である。また、凹溝７５の幅は、ガラス溶接棒７の径よりも小さく形成されているため、凹溝７５にガラス溶接棒７を載置したとき、凹溝７５の側端角部８９，９１の２点でガラス溶接棒７が支持される。   That is, as shown in FIG. 9A, the notch 69 of the sealing lid 63 includes a side portion 79 extending along the side surface 67 of the sealing lid 63 and a bottom portion extending orthogonally to the side portion 79. 81 and an L-shaped cross section. Further, the notch 73 of the glass substrate 71 is formed in an L-shaped cross section from a side portion 85 extending along the side surface 83 of the glass substrate 71 and a bottom portion 87 extending orthogonally to the side portion 85. Then, by aligning the positions of the notches 69 of the sealing lid 63 and the notches 73 of the glass substrate 71 with the side portions 79 and 85, a concave groove 75 having a rectangular cross section is formed. The cross-sectional area of the concave groove 75 is the same as the cross-sectional area of the glass welding rod 7. Moreover, since the width of the concave groove 75 is formed smaller than the diameter of the glass welding rod 7, when the glass welding rod 7 is placed in the concave groove 75, the side end corners 89 and 91 of the concave groove 75 are arranged. The glass welding rod 7 is supported at two points.

次に、第２実施形態において、封止蓋６３をガラス基板７１に接合して表示パネル７７を製造する手順を説明する。なお、以下の作業は、窒素等の不活性ガスを封入したグローブボックスの内部で行うため、表示パネル７７の内部空間には不活性ガスが充填される。   Next, a procedure for manufacturing the display panel 77 by bonding the sealing lid 63 to the glass substrate 71 in the second embodiment will be described. Since the following operation is performed inside a glove box filled with an inert gas such as nitrogen, the internal space of the display panel 77 is filled with the inert gas.

まず、図９（ａ）に示すように、封止蓋６３とガラス基板７１を突き合わせた状態で、上側に配置される凹溝７５にガラス溶接棒７を載置する。このとき、前述したように、ガラス溶接棒７は、凹溝７５の側端角部８９，９１の２点で支持される。   First, as shown in FIG. 9A, the glass welding rod 7 is placed in the concave groove 75 disposed on the upper side in a state where the sealing lid 63 and the glass substrate 71 are abutted with each other. At this time, as described above, the glass welding rod 7 is supported at two points of the side end corner portions 89 and 91 of the concave groove 75.

次いで、図９（ａ）に示すように、ガラス溶接棒７にレーザー光４５を照射すると、ガラス溶接棒７は溶融し、図９（ｂ）に示すように、溶融ガラス３９は凹溝７５内に充填されて、封止蓋６３およびガラス基板７１の周縁部の側面６７，８３と同じ液面高さとなる。   Next, as shown in FIG. 9A, when the glass welding rod 7 is irradiated with the laser beam 45, the glass welding rod 7 is melted, and as shown in FIG. 9B, the molten glass 39 is in the concave groove 75. So that the liquid level is the same as the side surfaces 67 and 83 of the peripheral edge of the sealing lid 63 and the glass substrate 71.

そして、そのまま放置すると、溶融ガラス３９は固化してガラス基板７１の周縁部と封止蓋６３の周縁部とが接合される。   If left as it is, the molten glass 39 is solidified and the peripheral edge of the glass substrate 71 and the peripheral edge of the sealing lid 63 are joined.

次いで、封止蓋６３とガラス基板７１を９０°回転させて、上側に配置された別の凹溝７５にガラス溶接棒７を載置させ、ガラス溶接棒７にレーザー光４５を照射して同様の接合作業を行う。これを４回繰り返すことによって、４つの凹溝７５をガラスで接合し、封止蓋６３とガラス基板７１の全周囲を接合する。   Next, the sealing lid 63 and the glass substrate 71 are rotated by 90 °, the glass welding rod 7 is placed in another concave groove 75 arranged on the upper side, and the laser welding 45 is irradiated with the laser beam 45 in the same manner. Perform the joining work. By repeating this four times, the four concave grooves 75 are joined with glass, and the entire periphery of the sealing lid 63 and the glass substrate 71 is joined.

これによって、有機ＥＬ素子をガラス基板７１と封止蓋６３とで封止した表示パネル７７が完成する。なお、前記レーザー光４５としては、例えば、波長が１０６４ｎｍのＹＡＧレーザーやＹＶＯ４レーザーなどが好ましい。 Thereby, the display panel 77 in which the organic EL element is sealed with the glass substrate 71 and the sealing lid 63 is completed. The laser beam 45 is preferably, for example, a YAG laser or YVO 4 laser having a wavelength of 1064 nm.

以下に、第２実施形態による効果を説明する。   Below, the effect by 2nd Embodiment is demonstrated.

（１）前記封止蓋６３の周縁部における底面６５および側面６７を含む角部を削ると共に、この封止蓋６３の角部に対向するガラス基板７１の角部を削ることによって凹溝７５を形成し、該凹溝７５に沿ってガラス溶接棒７を載置する。 (1) While cutting the corners including the bottom surface 65 and the side surface 67 at the peripheral edge of the sealing lid 63, the concave grooves 75 are formed by scraping the corners of the glass substrate 71 facing the corners of the sealing lid 63. Then, the glass welding rod 7 is placed along the concave groove 75.

これによって、封止する有機ＥＬ素子の面積を大きくすることができる。即ち、凹溝７５を封止蓋６３およびガラス基板７１の最周縁に形成することができるため、有機ＥＬ素子を配置する部位の面積を大きく設定することができる。   Thereby, the area of the organic EL element to be sealed can be increased. That is, since the concave groove 75 can be formed in the outermost periphery of the sealing lid 63 and the glass substrate 71, the area of the part where the organic EL element is arranged can be set large.

[第２実施形態における第１変形例]
前述した凹溝の形状は、断面矩形状に限定されず、図１０に示すように断面で円弧状に形成しても良い。 [First Modification in Second Embodiment]
The shape of the groove described above is not limited to a rectangular cross section, and may be formed in an arc shape in cross section as shown in FIG.

具体的には、第１変形例による表示パネル１０９の凹溝９３は、ガラス溶接棒７の断面の半径よりも大きな曲率半径を有する断面円弧状に形成されている。具体的には、封止蓋９５の側面９７を削って形成した切欠き９９と、ガラス基板１０１の側面１０３を削って形成した切欠き１０５とを突き合わせて凹溝９３が形成される。この場合も、凹溝９３の断面積は、ガラス溶接棒７の断面積と同一に設定されている。また、ガラス溶接棒７を、凹溝９３の底面に載置した場合、ガラス溶接棒７の下端１０７は凹溝９３の底面に当接する。このように、断面においては、ガラス溶接棒７は下端の１点で支持される。   Specifically, the concave groove 93 of the display panel 109 according to the first modification is formed in a circular arc shape having a radius of curvature larger than the radius of the cross section of the glass welding rod 7. Specifically, the notch 99 formed by cutting the side surface 97 of the sealing lid 95 and the notch 105 formed by cutting the side surface 103 of the glass substrate 101 are abutted to form the concave groove 93. Also in this case, the cross-sectional area of the concave groove 93 is set to be the same as the cross-sectional area of the glass welding rod 7. Further, when the glass welding rod 7 is placed on the bottom surface of the concave groove 93, the lower end 107 of the glass welding rod 7 comes into contact with the bottom surface of the concave groove 93. Thus, in the cross section, the glass welding rod 7 is supported at one point at the lower end.

当該第１変形例による効果は、前述した第１実施形態における第１変形例の効果と同様である。   The effect by the said 1st modification is the same as the effect of the 1st modification in 1st Embodiment mentioned above.

[第２実施形態における第２変形例]
前述した凹溝の形状は、断面矩形状または断面円弧状に限定されず、図１１に示すように断面でＶ字状に形成しても良い。 [Second Modification of Second Embodiment]
The shape of the concave groove described above is not limited to a rectangular cross section or a circular arc shape, and may be formed in a V shape in cross section as shown in FIG.

この場合も、表示パネル１１１における凹溝１１３は、封止蓋１１５の側面１１７を削って形成した切欠き１１９と、ガラス基板１２１の側面１２３を削って形成した切欠き１２５とを突き合わせて凹溝１１３が形成される。   Also in this case, the concave groove 113 in the display panel 111 is formed by abutting a notch 119 formed by cutting the side surface 117 of the sealing lid 115 with a notch 125 formed by cutting the side surface 123 of the glass substrate 121. 113 is formed.

凹溝１１３の断面積は、ガラス溶接棒７の断面積と同一に設定されている。また、ガラス溶接棒７を、凹溝１１３の底面に載置した場合、ガラス溶接棒の左右両側における下側接触部１２７，１２９は凹溝１１３の底面に当接する。このように、断面においては、ガラス溶接棒７は下側の２点で支持される。   The cross-sectional area of the concave groove 113 is set to be the same as the cross-sectional area of the glass welding rod 7. When the glass welding rod 7 is placed on the bottom surface of the concave groove 113, the lower contact portions 127 and 129 on the left and right sides of the glass welding rod abut on the bottom surface of the concave groove 113. Thus, in the cross section, the glass welding rod 7 is supported at the lower two points.

当該第２変形例による効果は、前述した第１実施形態における第２変形例の効果と同様である。   The effect by the said 2nd modification is the same as the effect of the 2nd modification in 1st Embodiment mentioned above.

１…表示パネル
３…ガラス基板
５…封止蓋
７…ガラス溶接棒
１７…凹溝
４１…周縁部
４３…有機ＥＬ素子
４５…レーザー光
４７…凹溝
５３…ガラス基板
５４…ガラス基板
５５…凹溝
６３…封止蓋
６５…底面
６７，８３…側面
７１…ガラス基板
７５…凹溝
７７…表示パネル
９３…凹溝
９５…封止蓋
１０１…ガラス基板
１０９…表示パネル
１１１…表示パネル
１１３…凹溝
１１５…封止蓋
１２１…ガラス基板 DESCRIPTION OF SYMBOLS 1 ... Display panel 3 ... Glass substrate 5 ... Sealing lid 7 ... Glass welding rod 17 ... Groove 41 ... Peripheral part 43 ... Organic EL element 45 ... Laser beam 47 ... Groove 53 ... Glass substrate 54 ... Glass substrate 55 ... Concave Groove 63 ... Sealing lid 65 ... Bottom 67, 83 ... Side 71 ... Glass substrate 75 ... Concave groove 77 ... Display panel 93 ... Concave groove 95 ... Sealing lid 101 ... Glass substrate 109 ... Display panel 111 ... Display panel 113 ... Concave Groove 115 ... Sealing lid 121 ... Glass substrate

Claims (6)

ガラス製の封止蓋の周縁部を、有機エレクトロルミネッサンス素子を載置したガラス基板の周縁部に接合することにより有機エレクトロルミネッサンス素子を収容した状態で封止する表示パネルの製造方法であって、
前記封止蓋の周縁部およびガラス基板の周縁部のうち少なくともいずれかに凹溝を形成し、
断面円形状の長尺状に形成されると共に、前記封止蓋およびガラス基板よりも融点が低く、レーザー光の照射によって溶融可能なガラス溶接棒を前記凹溝に沿って配置し、
レーザー光を前記ガラス溶接棒に照射し、ガラス溶接棒を溶融させて前記凹溝内に収容したのち固化させることにより、
前記封止蓋の周縁部を、ガラス基板の周縁部に密着させた状態で接合することを特徴とする表示パネルの製造方法。 A method of manufacturing a display panel for sealing an organic electroluminescence element in a state where the organic electroluminescence element is accommodated by joining the periphery of a glass sealing lid to the periphery of a glass substrate on which the organic electroluminescence element is placed. And
Forming at least one of the peripheral edge of the sealing lid and the peripheral edge of the glass substrate,
A glass welding rod that is formed in a long shape with a circular cross section, has a melting point lower than that of the sealing lid and the glass substrate, and can be melted by laser light irradiation, is disposed along the concave groove,
By irradiating the glass welding rod with laser light, melting the glass welding rod and storing it in the concave groove, and then solidifying it,
A method of manufacturing a display panel, comprising joining the peripheral edge of the sealing lid in a state of being in close contact with the peripheral edge of the glass substrate. 前記封止蓋の周縁部の底面を平坦に形成し、ガラス基板の周縁部の表面に凹溝を形成し、該凹溝に沿ってガラス溶接棒を載置することを特徴とする請求項１に記載の表示パネルの製造方法。   The bottom surface of the peripheral edge of the sealing lid is formed flat, a concave groove is formed on the surface of the peripheral edge of the glass substrate, and a glass welding rod is placed along the concave groove. The manufacturing method of the display panel of description. 前記封止蓋の周縁部における底面および側面を含む角部を削ると共に、この封止蓋の角部に対向するガラス基板の角部を削ることによって前記凹溝を形成し、該凹溝に沿ってガラス溶接棒を載置することを特徴とする請求項１に記載の表示パネルの製造方法。   The corners including the bottom and side surfaces of the peripheral edge of the sealing lid are scraped, and the concave grooves are formed by scraping the corners of the glass substrate facing the corners of the sealing lid, along the concave grooves. A method of manufacturing a display panel according to claim 1, further comprising mounting a glass welding rod. 前記凹溝の断面形状を、ガラス溶接棒の径よりも大きい曲率半径を有する円弧状に形成したことを特徴とする請求項１〜３のいずれか１項に記載の表示パネルの製造方法。   The method for manufacturing a display panel according to any one of claims 1 to 3, wherein a cross-sectional shape of the concave groove is formed in an arc shape having a radius of curvature larger than the diameter of the glass welding rod. 前記凹溝の断面形状を、ガラス溶接棒の直径よりも幅寸法が小さい矩形状に形成したことを特徴とする請求項１〜３のいずれか１項に記載の表示パネルの製造方法。   The method for manufacturing a display panel according to any one of claims 1 to 3, wherein the cross-sectional shape of the groove is formed in a rectangular shape having a width dimension smaller than the diameter of the glass welding rod. 前記凹溝の断面形状をＶ字状に形成したことを特徴とする請求項１〜３のいずれか１項に記載の表示パネルの製造方法。   The method for manufacturing a display panel according to claim 1, wherein a cross-sectional shape of the concave groove is formed in a V shape.
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US10080296B2 (en) 2015-09-22 2018-09-18 Samsung Electronics Co., Ltd. Fine interval coating member for LED display and coating method using the same
US10477696B2 (en) 2015-09-22 2019-11-12 Samsung Electronics Co., Ltd. Fine interval coating member for LED display and coating method using the same
WO2023249375A1 (en) * 2022-06-21 2023-12-28 한양이엔지 주식회사 Chemical booth using pvc member and manufacturing method thereof

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