KR900001699B1 - Plasma display cell - Google Patents

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KR900001699B1
KR900001699B1 KR1019870014077A KR870014077A KR900001699B1 KR 900001699 B1 KR900001699 B1 KR 900001699B1 KR 1019870014077 A KR1019870014077 A KR 1019870014077A KR 870014077 A KR870014077 A KR 870014077A KR 900001699 B1 KR900001699 B1 KR 900001699B1
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glass
transparent electrode
plasma display
thickness
refractive index
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KR890010984A (en
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송원
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삼성전관 주식회사
김정배
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20Constructional details
    • H01J11/34Vessels, containers or parts thereof, e.g. substrates
    • H01J11/44Optical arrangements or shielding arrangements, e.g. filters, black matrices, light reflecting means or electromagnetic shielding means

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Abstract

The plasma display panel for improving the contrast includes a transparent electrode (3) and an electrode (6), a barrier layer (4) and a sealing glass (5) formed between the above glass (11) and the lower glass (7). The thickness of the transparent electrode (3) comprising ZnS or CeO2 with a refractive index of 2.35 is 4800Ao . The non-reflection layer is formed to decrease the light reflection radiated by the transparent electrode and the above glass.

Description

플라즈마 표시소자Plasma display element

제1도는 종래의 플라즈마 표시소자의 단면도.1 is a cross-sectional view of a conventional plasma display device.

제2도는 본 발명의 플라즈마 표시소자의 단면도.2 is a cross-sectional view of the plasma display device of the present invention.

제3도는 각 층의 반사계수와 굴절률을 나타낸 도면이다.3 is a diagram showing the reflection coefficient and the refractive index of each layer.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 상판유리 2 : 무반사층1: top glass 2: antireflective layer

3 : 투면전극 4 : 베리어3: projection electrode 4: barrier

5 : 시일링 유리 6 : 전극5: sealing glass 6: electrode

7 : 하판유리7: bottom glass

본 발명은 가스방전을 이용한 플라즈마 표시소자에 관한 것으로서, 특히 투명전극의 두께를 λ/4홀수배로 조절하고, 무반사층을 유리기판 위에 증착시켜 투명전극와 유리기판에서의 반사를 최소화시킴으로써 콘트라스트(contrast)를 향상시키는 플라즈마 표시소자에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device using gas discharge. In particular, the thickness of the transparent electrode is controlled to be λ / 4 odd and the antireflection layer is deposited on the glass substrate to minimize the reflection on the transparent electrode and the glass substrate. It relates to a plasma display device for improving the.

플라즈마 표시소자(Plasma Display pannel, PDP)는 전극 사이에 가스를 주입시켜 양단에 전압을 인가하면 가속된 전자에 의해 여기된 가스가 기저상태로 떨어질 때 가스 고유의 빛을 발광하는 것을 이용한 평판 표시소자이다.Plasma display pannel (PDP) is a flat panel display device that emits gas intrinsic light when a gas is injected between electrodes and a voltage is applied to both ends thereof when the gas excited by the accelerated electrons falls to the ground state. to be.

제1도는 종래의 플라즈마 표시소자의 단면도를 나타낸 것으로서, 상판유리(1)와 하판유리(7) 사이에 전극(3,6)을 형성하여 두 전극(3,6) 사이에 150V-200V의 전압을 인가하면 유리(1,7)사이에 주입된 가스가 플라즈마 상태를 유지하며, 2차 전자에 의해 가스가 여기되어 기저 상태로 떨어질 때 가스 고유파장의 빛을 방출하게 된다.FIG. 1 is a cross-sectional view of a conventional plasma display device, in which electrodes 3 and 6 are formed between upper glass 1 and lower glass 7 so as to have a voltage of 150 V to 200 V between two electrodes 3 and 6. When is applied, the gas injected between the glass 1 and 7 maintains the plasma state, and when the gas is excited by the secondary electrons and falls to the ground state, it emits light having a gas intrinsic wavelength.

이때, 발광된 빛은 투명전극(3)과 유리기판(1)을 통해서 볼 수 있는데, 투명전극(3)과 유리기관(1)에 의해 빛이 반사되어 콘트라스트가 저하되는 문제점이 있었다.At this time, the emitted light can be seen through the transparent electrode 3 and the glass substrate 1, but the light is reflected by the transparent electrode 3 and the glass organ 1 has a problem that the contrast is reduced.

본 발명은 상기한 바와 같은 종래기술의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 투명전극의 두께를 조절하고 상판유리에 부반사층을 형성하여 투명전극과 상판유리에 의한 빛의 반사를 감소시킴으로써 콘트라스트를 향상시킨 플라즈마 표시소자를 제공하는 데 있다.The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to control the thickness of the transparent electrode and to form a sub-reflection layer on the top glass to reflect the light by the transparent electrode and the top glass The present invention provides a plasma display device having a reduced contrast.

상기한 바와 같은 목적을 달성하기 위하여 본 발명은 상판유리와 하판유리사이에 투명전극과 전극이 형성되고, 베리어와 시일링 유리를 개재하여 이루어진 가스방전을 이용한 플라즈마 표시소자에 있어서, 상판유리 위에 굴절률이 0.35인 CeO2나 Zns로 투명전극의 두께를 4800Å으로 형성시키고, 1600Å의 두께로 무반사층을 형성시킴으로서 투명전극과 상판유리에 의한 빛의 반사를 감소시켜 콘트라스트를 향상시키는 것을 특징으로 하는 플라즈마 표시소자를 제공한다.In order to achieve the above object, the present invention provides a transparent electrode and an electrode between the upper glass and the lower glass, the plasma display device using a gas discharge made through the barrier and the sealing glass, the refractive index on the upper glass The 0.35 CeO 2 or Zns is used to form a transparent electrode with a thickness of 4800Å, and an anti-reflective layer is formed with a thickness of 1600Å, thereby reducing the reflection of light by the transparent electrode and the upper glass, thereby improving contrast. Provided is an element.

이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명의 플라즈마 표시소자의 단면도를 나타낸 것이다. 투명전극(3)의 두께를 조절하고 유리기판(1)을 형성한 다음 무반사층(2)을 증착시킨 후 전극(3)을 형성하므로써 유리기판(1,7) 사이에 주입된 네온과 아르곤의 혼합가스의 방전시 발생되는 빛의 반사를 무반사층(2)를 사용하여 최소화시키는 플라즈마 표시이다.2 is a cross-sectional view of the plasma display device of the present invention. The thickness of the transparent electrode 3 is controlled, the glass substrate 1 is formed, the antireflective layer 2 is deposited, and the electrode 3 is formed to form the neon and argon injected between the glass substrates 1 and 7. It is a plasma display that minimizes the reflection of light generated when the mixed gas is discharged using the antireflective layer 2.

미설명 부호 4와 5는 배리어(barrier)와 시일링 유리(sealing glass)를 나타내는 것이다.Reference numerals 4 and 5 denote barriers and sealing glass.

반사계수와 굴절율이 도시된 제3도를 참조하여 투명전극(3)의 두께를 조절하고 무반사막을 증착시키는 조건을 설명하면 다음과 같다.Referring to FIG. 3 showing the reflection coefficient and the refractive index, the conditions for adjusting the thickness of the transparent electrode 3 and depositing the antireflective film will be described as follows.

제3도에 도시된 바와 같이 투명전극(3)의 두께와 굴절률을 각각 d1, n1이라하고, 무반사층(2)의 두께와 굴절률을 d2, n2, 상판유리(1)의 굴절률을 ns라하면 반사계수는 다음과 같다.As shown in FIG. 3, when the thickness and refractive index of the transparent electrode 3 are d1 and n1, respectively, the thickness and refractive index of the antireflective layer 2 are d2, n2 and the refractive index of the upper glass 1 is ns. The reflection coefficient is as follows.

Figure kpo00001
Figure kpo00001

그리고 유리기판(1)과 무반사층(2)와의 반사계수(r')은 다음과 같다.The reflection coefficient r 'between the glass substrate 1 and the antireflective layer 2 is as follows.

Figure kpo00002
Figure kpo00002

유리기관(1), 무반사층(2) 및 투명전극(3)의 전체 반사계수(r)는 다음과 같다.The total reflection coefficient r of the glass engine 1, the antireflection layer 2, and the transparent electrode 3 is as follows.

Figure kpo00003
Figure kpo00003

이때 σ1=2πn1d1/λ, σ2=2πn2d2/λ이다. 여기서, σ는 임으로 정한 것이다. 반사강도(R)은 R=|r2|이므로 반사강도 (R)이 최소가 되는 점을 찾으면 된다. 즉, 식(2)에 식(1)을 대입한 값의 분자의 실수와 허수가 "0"이 되기 위해서는At this time, σ1 = 2πn1d1 / λ, σ2 = 2πn2d2 / λ. Here, σ is determined to be. Since the reflection intensity R is R = | r 2 |, it is necessary to find the point where the reflection intensity R is minimum. In other words, the real number and the imaginary number of the numerator of the value substituted by Eq. (1) in Eq.

Figure kpo00004
Figure kpo00004

이 된다. 이때 상기에서 가정한 σ1=σ2=σ이면 즉, n1d1=n2d2이면, 상기한 식(3), (4)의 성립조건은Becomes At this time, if sigma 1 = sigma 2 = sigma, that is, if n1d1 = n2d2, the conditions of the above formulas (3) and (4)

Figure kpo00005
Figure kpo00005

이다. 따라서 n1d1=n2d2가 성립되면 상기한 식(5), (6)이 성립되는 무반사층을 제작하면 최소의 반사강도를 얻을 수 있다. 이때,λ는 유리기판(1,7) 사이에 주입된 고유파장을 나타낸다. 그리고, 투명전극(3)의 굴절률 n1는 1.91이고, 유리기판(1)의 굴절율 ns는 1.5이며 유리기관(1,7) 사이의 굴절률 m0는 1이다.to be. Therefore, when n1d1 = n2d2 is established, the minimum reflection strength can be obtained by manufacturing the antireflection layer in which the above formulas (5) and (6) are established. Is the intrinsic wavelength injected between the glass substrates 1,7. The refractive index n1 of the transparent electrode 3 is 1.91, the refractive index ns of the glass substrate 1 is 1.5, and the refractive index m0 between the glass tubes 1, 7 is 1.

따라서, 식(5)를 만족하는 무반사층(2)의 굴절률 n2는 2,3 근처가 된다. 굴절률이 2,3근처인 즉, 2.35인 CeO2나 Zns를 무반사층으로 사용하며 이때의 두께는 n1d1=n2d2 및 식(6)을 만족하는 값을 갖게돤다.Therefore, the refractive index n2 of the antireflective layer 2 which satisfy | fills Formula (5) becomes about 2,3. CeO2 or Zns having a refractive index of around 2.35, that is, 2.35, is used as the anti-reflective layer, and the thickness has a value satisfying n1d1 = n2d2 and equation (6).

플라즈마 표시소자에 사용되는 네온가스의 파장이 6400Å이므로 투명전극(3)을 4800Å의 두께로 하고, 무반사층(2)의 두께를 1600Å 으로 형성하여 유리기판(1)과 투명전극(3)에 의한 빛의 반사를 최소화 시킴으로써 콘트라스트를 향상 시킬 수 있는 효과가 있다.Since the wavelength of the neon gas used in the plasma display device is 6400 kHz, the transparent electrode 3 is 4800 두께 thick and the antireflective layer 2 is formed at 1600 Å by the glass substrate 1 and the transparent electrode 3. Minimizing the reflection of light has the effect of improving the contrast.

Claims (1)

상판유리(1)와 하판유리(7) 사이에 투명전극(3)과 전극(6)이 형성되고, 배리어(4)와 시일링유리(5)를 개재하여 이루어진 가스방전을 이용한 플라즈마 표시소자에 있어서, 상판유리(1)위에 굴절률이 2.35인 CeO2나 Zns로 투명전극(3)의 두께를 4800Å으로 형성시키고, 1600Å의 두께로 무반사층(2)을 형성시켜 투명전극(3)과 상판유리 (1)에 의한 빛의 반사를 감소시켜 콘트라스트를 향상시키는 것을 특징으로 하는 플라즈마표시소자.The transparent electrode 3 and the electrode 6 are formed between the upper plate glass 1 and the lower plate glass 7, and the plasma display device using gas discharge is formed through the barrier 4 and the sealing glass 5. In this case, the thickness of the transparent electrode 3 is formed on the upper plate glass 1 with CeO 2 or Zns having a refractive index of 2.35 to 4800 mm, and the anti-reflective layer 2 is formed to a thickness of 1600 mm to form the transparent electrode 3 and the upper glass. A plasma display element characterized in that the contrast is improved by reducing the reflection of light by (1).
KR1019870014077A 1987-12-10 1987-12-10 Plasma display cell KR900001699B1 (en)

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