KR100300307B1 - Method for manufacturing fluorescent surface of color cathode ray tube - Google Patents
Method for manufacturing fluorescent surface of color cathode ray tube Download PDFInfo
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- KR100300307B1 KR100300307B1 KR1019930022120A KR930022120A KR100300307B1 KR 100300307 B1 KR100300307 B1 KR 100300307B1 KR 1019930022120 A KR1019930022120 A KR 1019930022120A KR 930022120 A KR930022120 A KR 930022120A KR 100300307 B1 KR100300307 B1 KR 100300307B1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
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Abstract
Description
[발명의 명칭][Name of invention]
칼라 브라운관의 형광면 제조방법Method for manufacturing fluorescent surface of color CRT
[발명의 상세한 설명]Detailed description of the invention
본 발명은 칼라 브라운관의 형광면 제조방법에 관한 것으로서, 더욱 상세하게는 형광면의 충진밀도 및 형광면의 평탄도를 향상시킴으로써 발광휘도가 월등히 향상된 칼라 브라운관용 형광면을 제조하는 방법에 관한 것이다.The present invention relates to a method for producing a fluorescent surface of a color CRT, and more particularly, to a method for producing a fluorescent surface for a color CRT by improving the filling density of the fluorescent screen and the flatness of the fluorescent screen.
일반적으로 브라운관 내면에는 적색 발광 형광체, 청색발광 형광체, 녹색발광 형광체가 균일하게 피착된 형광면이 존재한다. 이와 같은 형광면의 형성방법으로는 감광성 내식막이 들어 있는 형광체 슬러리액 조성물을 브라운관의 내면에 도포하여 감광성막을 형성한 뒤, 새도우 마스크를 통하여 녹색 발광 형광체, 정색발광 형광체, 적색발광 형광체를 순차적으로 노광하여 현상하므로써 형광면을 형성하는 슬러리법이 널리 사용되고 있다.In general, there is a fluorescent surface in which the red light emitting phosphor, the blue light emitting phosphor, and the green light emitting phosphor are uniformly deposited on the inner surface of the CRT. As a method of forming the fluorescent surface, the phosphor slurry composition containing the photosensitive resist is applied to the inner surface of the CRT to form a photosensitive film, and then the green light emitting phosphor, the color phosphor, and the red light emitting phosphor are sequentially exposed through a shadow mask. The slurry method which forms a fluorescent surface by developing is widely used.
종래의 슬러리법에 사용되는 형광체 슬러리 조성물에서는 중합도 2,000이상의 폴리비닐알코올(PVA)을 사용하였으므로, 이러한 형광체 슬러리 조성물을 사용하여 제조된 브라운관의 형광면은 형광체막의 충전밀도가 낮고 형광면의 평탄도가 낮아 알루미늄 증착막의 거울면 반사효과가 감소하고, 이에 따라 형광면의 발광휘도가 불충분한 문제점이 있다.Since the phosphor slurry composition used in the conventional slurry method uses polyvinyl alcohol (PVA) having a polymerization degree of 2,000 or more, the fluorescent surface of the CRT manufactured using the phosphor slurry composition has a low packing density of the phosphor film and a low flatness of the fluorescent surface. The mirror surface reflection effect of the deposited film is reduced, and thus there is a problem that the light emission luminance of the fluorescent surface is insufficient.
본 발명은 상기한 바와 같은 종래기술의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은, 형광체막의 충전밀도를 높이고 동시에 형광면의 평탄도를 개선하여 알루미늄 증착막의 거울면 반사 효과를 향상시킴으로써 브라운관의 발광휘도를 향상시킬 수 있는 형광면 제조방법을 제공하는 데에 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 increase the packing density of the phosphor film and at the same time improve the flatness of the fluorescent surface to improve the mirror surface reflection effect of the aluminum deposition film CRT It is to provide a fluorescent surface manufacturing method that can improve the luminous luminance of the.
상기한 바와 같은 목적을 달성하기 위하여 본 발명은, 슬러리법에 의해 칼라 브라운관용 형광면을 제조함에 있어서, 형광체 슬러리액에 사용되는 폴리비닐 알코올을 중합도 1,000∼1,500 및 감화도 86.5∼90몰%를 갖는 것을 사용하고 노광 후 현상단계에서 1.6∼2.0kg/㎠의 세정수압을 사용하는 것을 특징으로 하는 칼라브라운관용 형광면의 제조방법을 제공한다.In order to achieve the object as described above, the present invention, in producing a fluorescent screen for color CRT tube by the slurry method, the polyvinyl alcohol used for the phosphor slurry liquid having a polymerization degree of 1,000 to 1,500 and a degree of reduction of 86.5 to 90 mol%. It provides a method for producing a fluorescent surface for color tube, characterized in that for using the cleaning water pressure of 1.6 ~ 2.0kg / ㎠ in the post-exposure development step.
본 발명에서는 형광체 슬러리액에 사용되는 폴리비닐알코올의 중합도를 낮은 범위로 변경함으로써, 종래 형광체 슬러리액보다 점도는 낮고 비중은 높은 형광체 슬러리액을 제조하여 사용한다.In the present invention, by changing the degree of polymerization of the polyvinyl alcohol used in the phosphor slurry liquid to a low range, a phosphor slurry liquid having a lower viscosity and higher specific gravity than the conventional phosphor slurry liquid is prepared and used.
또한, 형광면의 현상공정에서 현상압력(세정수압)을 종래보다 약 30-50%정도 낮춤으로써, 형광면의 충진밀도를 향상시키고 동시에 막 평탄도도 향상시킬 수 있다.In addition, by lowering the developing pressure (clean water pressure) by about 30-50% in the developing step of the fluorescent surface, the filling density of the fluorescent surface can be improved and the film flatness can be improved at the same time.
본 발명의 형광면 제조방법을 상세히 설명하면 다음과 같다.Referring to the fluorescent surface manufacturing method of the present invention in detail as follows.
형광면 제조에 앞서 먼저 형광체 슬러리액을 제조한다.Prior to preparing the fluorescent surface, a phosphor slurry solution is first prepared.
(가) 칼라브라운관용 형광체 슬러리액의 체조(A) Gymnastics of phosphor slurry liquid for color brown tubes
일정량의 녹색, 청색 또는 적색 발광 형광체에 순수와 폴리비닐 알코올을 첨가한 뒤, 감광제 및 계면활성제체를 첨가하여, 혼합물을 볼밀 용기에 넣고 10~300rpm으로 3~15시간 정도 볼밀을 실시하여 칼라 브라운관용 형광체 슬러리액을 제조한다.Pure water and polyvinyl alcohol are added to a certain amount of green, blue or red luminescent phosphor, and then a photosensitive agent and a surfactant are added, the mixture is placed in a ball mill vessel and ball milled for about 3 to 15 hours at 10 to 300 rpm. A conventional fluorescent substance slurry liquid is prepared.
본 발명에서는 폴리비닐 알코올을 중합도 약 1,000-1,500 및 감화도86.5∼9o몰%인 것을 사용함을 특징으로 한다. 종래에는 중합도 2,000 이상의 폴리비닐 알코올을 사용하여 형광체 슬러리액을 제조한 경우에는 패널에 대한 접착력이 높은 잇점이 있었으나, 형광면의 막 평탄도가 불균일한 문제점이 있었다.In the present invention, polyvinyl alcohol has a degree of polymerization of about 1,000-1,500 and a degree of reduction. It is characterized by using 86.5-9 mol%. Conventionally, when the phosphor slurry liquid was prepared using polyvinyl alcohol having a polymerization degree of 2,000 or more, the adhesive strength to the panel was high, but the film flatness of the fluorescent surface was uneven.
형광체 슬러리액 제조에 사용되는 볼밀 용기는, 형광체 표면의 손상을 방지하기 위하여, PVC 재질의 용기를 사용하는 것이 바람직하다. 또한 볼밀 효과를 증대시키기 위해서는 용기 전체 부피의 70∼80% 정도의 형광체 슬러리액을 볼밀하는 것이 바람직하며, 이때 분산효과를 높이기 위하여 알루미나 볼이나 유리볼을 일정량 함께 첨가하는 것이 바람직하다.In the ball mill container used for producing the phosphor slurry, it is preferable to use a container made of PVC in order to prevent damage to the surface of the phosphor. In addition, in order to increase the ball mill effect, it is preferable to ball mill about 70-80% of the phosphor slurry liquid of the entire volume of the container, and in this case, it is preferable to add alumina balls or glass balls together in order to increase the dispersing effect.
(나) 형광면의 제조(B) Preparation of fluorescent screen
이상과 같이 하여 얻어진 형광체 슬러리액을 사용하여 형광면을 제조한다.The fluorescent surface is manufactured using the fluorescent substance slurry liquid obtained as mentioned above.
먼저, 브라운관의 패널 내면에, 자외선 등에 의하여 광점착성을 나타내는 광경화성 수지를 일정량 도포하고 건조시킨 다음, 노광하여 광점착막을 형성한다. 또는, 광경화성 수지 대신에 산화규소를 주성분으로 하는 도포액을 도포한 다음 묽은 불화수소산(HF) 분위기에서 건조시키는 방법을 사용할 수 있다. 어느 방법을 사용하여도 형광면에 미치는 영향은 크게 달라지지 않는다.First, a predetermined amount of a photocurable resin exhibiting photoadhesion by ultraviolet rays or the like is applied to a panel inner surface of the CRT, dried, and then exposed to form a photoadhesive film. Alternatively, a method of applying a coating liquid containing silicon oxide as a main component instead of the photocurable resin and then drying in a dilute hydrofluoric acid (HF) atmosphere may be used. Either method does not significantly affect the fluorescent surface.
이어서, 브라운관 패널 내면에 상기한 (가) 단계에서 제조된 녹색 발광 형광체 슬러리액을 도포하고 건조한 다음, 고압 수은 램프를 사용하여 노광을 실시한다. 노광이 끝난 후, 38~45℃의 온수로 세정을 실시하여 일정 모양의 스트라이프 또는 도트상의 형광면을 얻는다. 세정시 수압은 종래 형광면 제조시에 사용하는 압력보다 30~50% 낮은 1.6~2.0kg/㎠ 범위내인 것이 바람직하다. 압력이 상기 범위보다 높은 경우에는, 형광면 자체의 접착력이 종래 방법에 의한 슬러리액 보다 낮으므로 스트라이프 또는 도트 떨어짐 현상이 발생할 수 있다.Subsequently, the inner surface of the CRT panel is coated with the green luminescent phosphor slurry prepared in the above step (A) and dried, and then exposed using a high pressure mercury lamp. After exposure, it wash | cleans with warm water of 38-45 degreeC, and the fluorescent surface of a stripe or a dot of a certain shape is obtained. The water pressure during washing is preferably in the range of 1.6 to 2.0 kg / cm 2, which is 30 to 50% lower than the pressure used in the conventional fluorescent surface manufacturing. If the pressure is higher than the above range, since the adhesive force of the fluorescent surface itself is lower than the slurry liquid by the conventional method, striping or dot dropping may occur.
이어서 청색 발광형광체 슬러리액과 적색발광형광체 슬러리액을 사용하여 위와 같은 공정을 순차적으로 실시하여 형광면을 제조한다.Subsequently, the above process is sequentially performed using a blue light emitting slurry slurry and a red light emitting slurry slurry to prepare a fluorescent surface.
하기에 본 발명의 바람직한 실시예 및 본 발명의 효과를 입증할 수 있는 비교예를 기재한다.The following describes preferred examples of the present invention and comparative examples that can demonstrate the effects of the present invention.
[실시예 1]Example 1
하기 성분들의 혼합물을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 제조방법 에 따라 형광면을 제조하였다.The mixture of the following components was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry, and a phosphor surface was prepared according to a known phosphor surface production method using the prepared phosphor slurry solution.
단, 현상공정에서 세정수압은 1.8kg/㎠을 사용하였다.However, in the development process, the washing water pressure was used 1.8kg / ㎠.
[실시예 2]Example 2
하기 성분들의 혼합물을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 제조방법에 따라 형광면을 제조하였다. 단, 현상공정에서 세정수압은 1.8kg/㎠을 사용하였다.A mixture of the following components was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry, and a phosphor surface was prepared according to a known phosphor surface production method using the prepared phosphor slurry liquid. However, in the development process, the washing water pressure was used 1.8kg / ㎠.
＜형광체 슬러리액의 조성＞<The composition of the phosphor slurry liquid>
[실시예 3]Example 3
하기 성분들의 혼합물을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 제조방법 에 따라 형광면을 제조하였다. 단, 현상공정에서 세정수압은 1.8kg/㎠을 사용하였다.The mixture of the following components was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry, and a phosphor surface was prepared according to a known phosphor surface production method using the prepared phosphor slurry solution. However, in the development process, the washing water pressure was used 1.8kg / ㎠.
＜형광체 슬러리액의 조성＞<The composition of the phosphor slurry liquid>
[비교예 1]Comparative Example 1
하기 성분들의 혼합물을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조방법에 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 따라 형광면을 제조하였다.A mixture of the following components was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry solution, and a phosphor surface was prepared according to a known phosphor surface using the prepared phosphor slurry solution.
＜형광체 슬러리액의 조성＞<The composition of the phosphor slurry liquid>
[비교예 2]Comparative Example 2
하기 성분들의 혼합뮬을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조방법에 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 따라 형광면을 제조하였다.A mixture of the following components was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry solution, and a phosphor surface was prepared according to a known phosphor surface using the prepared phosphor slurry solution.
＜형광체 슬러리액의 조성＞<The composition of the phosphor slurry liquid>
[비교예 3]Comparative Example 3
하기 성분들의 혼합믈을 150rpm에서 10시간 동안 볼밀하여 형광체 슬러리액을 제조하였으며, 제조한 형광체 슬러리액을 이용하여 공지의 형광면 제조방법에 따라 형광면을 제조하였다.The mixture of the following ingredients was ball milled at 150 rpm for 10 hours to prepare a phosphor slurry, and a phosphor surface was prepared according to a known phosphor surface production method using the prepared phosphor slurry liquid.
＜형광체 슬러리액의 조성＞<The composition of the phosphor slurry liquid>
상기한 실시예 1 내지 3 및 비교예 1 내지 3에 의해 제조된 형광면의 발광휘도를 측정한 결과를 하기 표l에 나타낸다.Table 1 shows the results of measuring the emission luminance of the fluorescent screens prepared in Examples 1 to 3 and Comparative Examples 1 to 3.
[표 1]TABLE 1
상기 표1에서 알 수 있는 바와 같이, 종래의 슬러리법을 사용하여 제조된 형광면에서보다 본 발명에 따른 형광면 제조방법으로 제조한 형광면에서 발광휘도 특성이 약 5-10% 향상되었음을 알 수 있다.As can be seen in Table 1, it can be seen that the emission luminance characteristics of the fluorescent surface prepared by the fluorescent surface manufacturing method according to the present invention is improved by about 5-10%, compared to the fluorescent surface prepared using the conventional slurry method.
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| KR1019930022120A KR100300307B1 (en) | 1993-10-23 | 1993-10-23 | Method for manufacturing fluorescent surface of color cathode ray tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR840000967A (en) * | 1981-07-20 | 1984-03-26 | 미따 가쯔시게 | Method of forming cathode ray tube fluorescent surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR840000967A (en) * | 1981-07-20 | 1984-03-26 | 미따 가쯔시게 | Method of forming cathode ray tube fluorescent surface |
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