KR100759098B1 - Curing method for sealing of oled display - Google Patents

Curing method for sealing of oled display Download PDF

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Publication number
KR100759098B1
KR100759098B1 KR1020060105937A KR20060105937A KR100759098B1 KR 100759098 B1 KR100759098 B1 KR 100759098B1 KR 1020060105937 A KR1020060105937 A KR 1020060105937A KR 20060105937 A KR20060105937 A KR 20060105937A KR 100759098 B1 KR100759098 B1 KR 100759098B1
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South Korea
Prior art keywords
laser beam
sealing
oled display
output
irradiation
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KR1020060105937A
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Korean (ko)
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장민우
김창경
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로체 시스템즈(주)
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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
    • H10K50/84—Passivation; Containers; Encapsulations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
    • B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
    • B23K26/0626—Energy control of the laser beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/40—Semiconductor devices

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

A curing method for a sealing of an OLED(Organic Light Emitting Diode) display is provided to reduce cost by changing the amount of energy per unit area through the change of the output of a laser beam or moving speed. In a curing method for a sealing of an OLED display, the sealing located between an upper plate and a lower plate is cured by irradiating a laser beam. The output of the laser beam is decreased and the speed of the laser beam is increased for an overlapped irradiation region when starting and ending the irradiation of the laser beam. The output of the laser beam is decreased when irradiating the laser beam on the sealing of a curved unit of the OLED display.

Description

ＯＬＥＤ 디스플레이의 실링의 경화방법{Curing method for sealing of OLED display}Curing method for sealing of OLED display

도 1은 일반적인 OLED 디스플레이의 단면도이다.1 is a cross-sectional view of a typical OLED display.

도 2는 도 1의 OLED 디스플레이의 경화작업의 개략도이다.FIG. 2 is a schematic diagram of the curing operation of the OLED display of FIG. 1.

도 3은 도 2 중 일부분의 레이저 조사영역을 나타낸 개략도이다.3 is a schematic diagram illustrating a laser irradiation area of a portion of FIG. 2.

도 4는 도 2 중 처음과 끝의 레이저 출력 하강을 나타내는 그래프이다.FIG. 4 is a graph showing a decrease in laser output at the beginning and the end of FIG. 2.

도 5는 도 2 중 굴곡부의 레이저 출력 하강을 나타내는 그래프이다.FIG. 5 is a graph illustrating a decrease in laser output of the bent portion of FIG. 2.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 상판 20: 상부전극10: upper plate 20: upper electrode

30: 유기층 40: 하부전극30: organic layer 40: lower electrode

50: 하판 60: 실링50: bottom 60: sealing

70: 초기 조사영역 71: 굴곡부 조사영역70: initial irradiation area 71: bend irradiation area

본 발명은 OLED 디스플레이의 실링의 경화방법에 관한 것으로, 더욱 상세하게는 OLED 디스플레이의 주위를 둘러싸는 실링을 레이저를 통해 경화시킬 때 실링 전부분에 걸쳐 균일한 품질을 얻을 수 있는 OLED 디스플레이의 실링의 경화방법에 관한 것이다.The present invention relates to a curing method of the sealing of an OLED display, and more particularly, to a sealing of an OLED display that can obtain a uniform quality throughout the entire sealing when curing the sealing surrounding the OLED display with a laser. It relates to a curing method.

OLED(Organic Light Emitting Diode) 디스플레이 공정 중 OLED 소자(형광성 유기 화합물)의 외부 환경(습기) 침입을 막기 위해 디스플레이 패널 외부에 석영 재질과 열 전달 촉매제를 혼합하여 실링 처리를 하게 된다.In order to prevent invasion of the external environment (humidity) of the OLED device (fluorescent organic compound) during the OLED (Organic Light Emitting Diode) display process, a sealing material is mixed with a quartz material and a heat transfer catalyst outside the display panel.

도 1은 일반적인 OLED 디스플레이의 단면도로써, 하판(50)과 상판(10) 사이에 상부전극(20), 유기층(30), 하부전극(40)이 순서대로 적층되어 형성된다.FIG. 1 is a cross-sectional view of a general OLED display, in which an upper electrode 20, an organic layer 30, and a lower electrode 40 are sequentially stacked between a lower plate 50 and an upper plate 10.

그리고, 상기 상부전극(20), 유기층(30), 하부전극(40)의 외측으로 실링(60)이 형성된다.The sealing 60 is formed outside the upper electrode 20, the organic layer 30, and the lower electrode 40.

또, 상기 상부전극(20) 및 상기 하부전극(40)은 도시되지 않은 외부의 전원과 전기적으로 연결된다.In addition, the upper electrode 20 and the lower electrode 40 are electrically connected to an external power source (not shown).

이때, 상기 실링(60)을 상기 상판(10)과 상기 하판(50) 사이에 위치시킨 후, 상기 실링(60)을 경화(硬化, curing)시키지 않으면, 상기 상기 상부전극(20), 유기층(30), 하부전극(40)으로 이루어지는 OLED 소자를 덮고 있는 상판(10), 하판(50)이 떠버리는 경우가 발생할 수 있다.In this case, after the sealing 60 is positioned between the upper plate 10 and the lower plate 50 and the sealing 60 is not cured, the upper electrode 20 and the organic layer ( 30), the upper plate 10 and the lower plate 50 covering the OLED element formed of the lower electrode 40 may float.

또, 상기 실링(60)은 상기 상판(10)과 하판(50)의 접착제 역할도 한다.In addition, the seal 60 also serves as an adhesive of the upper plate 10 and the lower plate 50.

더욱이, 상기 실링(60)이 경화되지 않은 경우, OLED 소자내로 습기가 침투하여 OLED 소자를 파괴하게 된다.Moreover, when the seal 60 is not cured, moisture penetrates into the OLED device and destroys the OLED device.

따라서, 상기 실링(60)을 경화하게 되는데, 이 때 경화를 위한 에너지원으로 일반적으로 레이저빔의 열을 사용한다.Therefore, the seal 60 is cured, and in this case, heat of a laser beam is generally used as an energy source for curing.

그러나, 레이저빔의 조사를 실링(60) 전체에 대하여 균일하게 하는 경우에, 굴곡부 또는 시작/끝 부위는 레이저빔의 중복적인 조사로 인하여, 과출력에 노출되는 효과가 발생하여 실링 재질에 타버리는 현상이 발생한다.However, when the irradiation of the laser beam is made uniform with respect to the entire sealing 60, the bent portion or the start / end portion is exposed to the overpower due to the overlapping irradiation of the laser beam, which burns the sealing material. Phenomenon occurs.

상기의 문제점을 해결하기 위해 안출된 본 발명의 목적은, OLED 디스플레이의 주위를 둘러싸는 실링을 레이저를 통해 경화시킬 때 실링 전부분에 걸쳐 균일한 품질을 얻을 수 있는 OLED 디스플레이의 실링의 경화방법을 제공하는 데에 있다.An object of the present invention devised to solve the above problems is to provide a curing method of the sealing of the OLED display that can obtain a uniform quality throughout the entire sealing when curing the sealing surrounding the OLED display with a laser. To provide.

상기의 목적을 달성하기 위한 본 발명은, OLED 디스플레이를 구성하는 상판과 하판 사이에 위치하는 실링을 레이저빔을 조사하여 경화시키는 OLED 디스플레이의 실링의 경화방법에 있어서, 상기 레이저빔의 조사를 개시와 종료시 겹쳐지는 조사영역에 대하여, 상기 레이저빔의 출력을 저하시키는 것을 특징으로 하는 OLED 디스플레이의 실링의 경화방법이다.The present invention for achieving the above object, in the curing method of the sealing of the OLED display for irradiating and curing a laser beam of the seal located between the upper plate and the lower plate constituting the OLED display, the irradiation of the laser beam It is a hardening method of the sealing of OLED display which reduces the output of the said laser beam with respect to the irradiation area which overlaps at the end.

상기 OLED 디스플레이의 굴곡부의 실링의 상기 레이저빔의 조사시 상기 레이저빔의 출력을 저하시키는 것을 특징으로 한다.It characterized in that the output of the laser beam is lowered upon irradiation of the laser beam of the sealing of the bent portion of the OLED display.

또 다른 발명은, OLED 디스플레이를 구성하는 상판과 하판 사이에 위치하는 실링을 레이저빔을 조사하여 경화시키는 OLED 디스플레이의 실링의 경화방법에 있어서, 상기 레이저빔의 조사를 개시와 종료시 겹쳐지는 조사영역에 대하여, 상기 레이저빔의 속도를 증가시키는 것을 특징으로 하는 OLED 디스플레이의 실링의 경화방법이다.Another invention is a method for curing the sealing of an OLED display in which a sealing positioned between an upper plate and a lower plate constituting an OLED display is irradiated with a laser beam, wherein the irradiation of the laser beam is overlapped at the irradiation region overlapping at the start and the end. In contrast, the curing method of the sealing of the OLED display, characterized in that to increase the speed of the laser beam.

상기 OLED 디스플레이의 굴곡부의 실링의 상기 레이저빔의 조사시 상기 레이저빔의 출력을 저하시키는 것을 특징으로 한다.It characterized in that the output of the laser beam is lowered upon irradiation of the laser beam of the sealing of the bent portion of the OLED display.

이하, 본 발명을 바람직한 실시예를 첨부한 도면을 참조하여 설명하기로 한다. 하기의 각 도면의 구성 요소들에 참조 부호를 부가함에 있어서, 동일한 구성 요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호를 가지도록 하며, 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 공지 기능 및 구성에 대한 상세한 설명은 생략한다. Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described. In adding reference numerals to components of the following drawings, it is determined that the same components have the same reference numerals as much as possible even if displayed on different drawings, and it is determined that they may unnecessarily obscure the subject matter of the present invention. Detailed descriptions of well-known functions and configurations will be omitted.

도 2는 일반적인 OLED 디스플레이의 경화작업의 개략도로써, 독립된 물건으로써, 실링(60)은 폐곡선을 이루게 된다.2 is a schematic view of a curing operation of a typical OLED display, as a separate object, the sealing 60 is a closed curve.

따라서, 레이저발진장치(도시생략)에 의한 레이저빔(도시생략)에 의해 상기 실링(60)의 윤곽을 따라, 출발→A→B→C→D→출발로 경화가 이루어지게 된다.Accordingly, curing is performed from the start → A → B → C → D → start along the contour of the seal 60 by the laser beam (not shown) by the laser oscillator (not shown).

이 때, 도 3에 도시된 바와 같이, 출발지점의 초기 조사영역(70)은 다시 도 착지점이 되기 때문에, 상기 레이저빔의 조사영역은 겹쳐지게 된다.At this time, as shown in FIG. 3, since the initial irradiation area 70 of the starting point becomes the landing point again, the irradiation area of the laser beam overlaps.

또, 상기 굴곡부 조사영역(71)은 A,B,C,D에서 레이저빔이 상기 실링(60)을 따라 각운동을 해야 하므로, 조사영역이 겹쳐지게 형성될 수 밖에 없다. In addition, since the bent portion irradiation area 71 requires the laser beam to angularly move along the sealing 60 at A, B, C, and D, the irradiation areas are bound to overlap each other.

따라서, 상기 초기 조사영역(70)과 상기 굴곡부 조사영역(71)에서 레이저빔의 겹침으로 인한 상기 실링(60)이 변질되거나 탈 수 있게 된다.Therefore, the sealing 60 due to the overlap of the laser beam in the initial irradiation area 70 and the bend irradiation area 71 may be deteriorated or burned out.

그러므로, 상기 초기 조사영역(70)과 상기 굴곡부 조사영역(71)에서 공급되는 전체 에너지량을 줄이는 것으로 이러한 문제점을 해결할 수 있다.Therefore, this problem can be solved by reducing the total amount of energy supplied from the initial irradiation area 70 and the bend irradiation area 71.

이러한 에너지량을 줄이는 방법으로는 첫째, 레이저빔 자체의 출력을 낮추어 레이저빔의 강도를 저하시키는 것과, 둘째, 레이저빔의 이동속도를 크게 하여 단위시간당 레이저빔의 조사량을 줄이는 것이다.As a method of reducing the amount of energy, first, the output of the laser beam itself is lowered to lower the intensity of the laser beam, and second, the movement speed of the laser beam is increased to reduce the irradiation amount of the laser beam per unit time.

물론 두개의 방법을 동시에 사용하는 것도 가능하다.Of course, it is also possible to use both methods simultaneously.

도 4 및 도 5는 에너지를 줄이는 방법으로써, 출력을 낮추는 경우를 나타내고 있으며, 도 4는 처음과 끝의 레이저 출력 하강을 나타내는 그래프이고, 도 5는 굴곡부의 레이저 출력 하강을 나타내는 그래프이다.4 and 5 show a case in which the output is lowered as a method of reducing energy, and FIG. 4 is a graph showing the laser output drop at the beginning and the end, and FIG. 5 is a graph showing the laser output drop in the bent portion.

상기 레이저로 다이오드 레이저(파장대 : 800+/-10nm, 최대 출력 : 60 W)를 사용하는 경우, 공지의 DAQ(아날로그 출력) 카드(출력범위 0V ~ 10V)를 이용한 제어로써, 특정 구간의 레이저 출력을 실시간으로 임의 출력으로 변환시킬 수 있다.When using a diode laser (wavelength: 800 + /-10nm, maximum output: 60 W) as the laser, by using a known DAQ (analog output) card (output range 0V ~ 10V), the laser output of a specific section Can be converted to arbitrary output in real time.

상기와 같이, 본 발명의 바람직한 실시예를 참조하여 설명하였지만 해당 기술 분야의 숙련된 당업자라면 하기의 특허청구범위에 기재된 본 발명의 사상 및 영 역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다. As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

본 발명을 통하여, OLED 디스플레이의 주위를 둘러싸는 실링을 레이저를 통해 경화시킬 때 실링 전부분에 걸쳐 균일한 품질을 얻을 수 있다.Through the present invention, it is possible to obtain a uniform quality throughout the entire seal when the sealing surrounding the OLED display is cured with a laser.

특히, 특별한 장비 없이, 레이저빔의 출력 또는 이동속도를 변화시키는 것에 의해 실링에서 받는 단위면적당 에너지량을 변화시킬 수 있으므로, 적은 비용으로 본 발명을 실시할 수 있다.In particular, since the amount of energy per unit area received in the seal can be changed by changing the output or the moving speed of the laser beam without special equipment, the present invention can be implemented at a low cost.

또, 자동화를 통해 동일한 제품에 대하여 반복적으로 레이저빔의 출력 또는 속도를 변화시키는 것에 의해 본 발명은 대량생산에도 적용될 수 있다.In addition, the present invention can be applied to mass production by repeatedly changing the output or speed of the laser beam for the same product through automation.

Claims (3)

OLED 디스플레이를 구성하는 상판과 하판 사이에 위치하는 실링을 레이저빔을 조사하여 경화시키는 OLED 디스플레이의 실링의 경화방법에 있어서,In the hardening method of the sealing of OLED display which hardens the sealing located between the upper board and lower board which comprise an OLED display by irradiating a laser beam, 상기 레이저빔의 조사를 개시와 종료시 겹쳐지는 조사영역에 대하여, 상기 레이저빔의 출력을 저하시키는 것을 특징으로 하는 OLED 디스플레이의 실링의 경화방법.And curing the output of the laser beam in a region overlapping at the start and end of the irradiation of the laser beam. OLED 디스플레이를 구성하는 상판과 하판 사이에 위치하는 실링을 레이저빔을 조사하여 경화시키는 OLED 디스플레이의 실링의 경화방법에 있어서,In the hardening method of the sealing of OLED display which hardens the sealing located between the upper board and lower board which comprise an OLED display by irradiating a laser beam, 상기 레이저빔의 조사를 개시와 종료시 겹쳐지는 조사영역에 대하여, 상기 레이저빔의 속도를 증가시키는 것을 특징으로 하는 OLED 디스플레이의 실링의 경화방법.And the speed of the laser beam is increased with respect to the irradiation area overlapping at the start and the end of the irradiation of the laser beam. 제1항 또는 제2항에 있어서, 상기 OLED 디스플레이의 굴곡부의 실링의 상기 레이저빔의 조사시 상기 레이저빔의 출력을 저하시키는 것을 특징으로 하는 OLED 디스플레이의 실링의 경화방법.The curing method of the sealing of an OLED display according to claim 1 or 2, wherein the output of the laser beam is lowered upon irradiation of the laser beam of the sealing of the bent portion of the OLED display.
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