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JPH0664990B2 - Exposure device for creating fluorescent screen of color cathode ray tube - Google Patents
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JPH0664990B2 - Exposure device for creating fluorescent screen of color cathode ray tube - Google Patents

Exposure device for creating fluorescent screen of color cathode ray tube

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Publication number
JPH0664990B2
JPH0664990B2 JP11276087A JP11276087A JPH0664990B2 JP H0664990 B2 JPH0664990 B2 JP H0664990B2 JP 11276087 A JP11276087 A JP 11276087A JP 11276087 A JP11276087 A JP 11276087A JP H0664990 B2 JPH0664990 B2 JP H0664990B2
Authority
JP
Japan
Prior art keywords
light source
fluorescent screen
cathode ray
ray tube
linear light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP11276087A
Other languages
Japanese (ja)
Other versions
JPS63279538A (en
Inventor
哲也 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11276087A priority Critical patent/JPH0664990B2/en
Publication of JPS63279538A publication Critical patent/JPS63279538A/en
Publication of JPH0664990B2 publication Critical patent/JPH0664990B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、カラー陰極線管のフエースパネルの内面に
3色蛍光面パターンを作成する露光装置に関するもの
で、特に露光装置の光源として直管形超高圧水銀灯のよ
うな線光源を用いた露光装置に関するものである。
Description: TECHNICAL FIELD The present invention relates to an exposure apparatus for forming a three-color fluorescent screen pattern on the inner surface of a face panel of a color cathode ray tube, and particularly to a straight tube type as a light source of the exposure apparatus. The present invention relates to an exposure apparatus that uses a linear light source such as an ultra-high pressure mercury lamp.

[従来の技術] 第5図は、従来のカラー陰極線管の蛍光面作成用露光装
置を示す概略正面図である。
[Prior Art] FIG. 5 is a schematic front view showing an exposure apparatus for forming a fluorescent screen of a conventional color cathode ray tube.

同図において、(1)は支持フレームで、上下方向に所
定間隔をあけて複数の支持台(2a),(2b),(2c),
(2d)および(2e)が設けられている。(4)は露光装
置で、そのケース(4a)内には、直管形の超高圧水銀灯
のような線光源(5)と、この線光源(5)から放射さ
れた光線(6)の放射角度を規制する規則窓(7a)を有
するしや光板(7)が収納されている。なお、上記線光
源(5)は3色蛍光体のそれぞれの色に対応する光線の
軌道を作るために、最下段の支持台(2a)に調整可能に
取付けられている。(8)は光量補正フイルタで、上記
支持台(2b)に取付けられており、上記線光源(5)か
ら放射された光線(6)の光量を補正する。(9),
(10)は複雑な曲面の非対称非球面を有する一対の光偏
向補正レンズで、上記線光源(5)から放射された光線
(6)の軌道と、露光時の光路とを一致させるために、
上記支持台(2c),(2d)に調整可能に取り付けられて
いる。
In the figure, (1) is a support frame, and a plurality of support bases (2a), (2b), (2c), which are vertically spaced at predetermined intervals,
(2d) and (2e) are provided. Reference numeral (4) is an exposure apparatus, and in its case (4a), a linear light source (5) such as a straight tube type ultra-high pressure mercury lamp and radiation of a light beam (6) emitted from this linear light source (5). A light board (7) having a rule window (7a) for controlling the angle is housed. The linear light source (5) is adjustably attached to the lowermost support base (2a) in order to make a trajectory of light rays corresponding to each color of the three-color phosphor. Reference numeral (8) is a light quantity correction filter, which is attached to the support table (2b) and corrects the light quantity of the light beam (6) emitted from the linear light source (5). (9),
(10) is a pair of optical deflection correction lenses having an asymmetric aspherical surface with a complicated curved surface. In order to match the trajectory of the light beam (6) emitted from the linear light source (5) with the optical path at the time of exposure,
It is adjustably attached to the supports (2c) and (2d).

(11)はカラー陰極線管のフエースパネルで、このフエ
ースパネル(11)はその内面を下向きにして上記支持台
(2e)のほぼ中央部に取付けられている。(12)は上記
フエースパネル(11)の内面に形成された感光膜で、感
光性樹脂に蛍光体を分散させたスラリを塗布し、乾燥さ
せたものである。(13)はマスク孔(13a)をもったシ
ャドウマスクで、上記フエースパネル(11)の感光膜
(12)と所定間隔をあけてフエースパネル(11)に着脱
自在に取り付けられている。
Reference numeral (11) is a face panel of the color cathode ray tube, and the face panel (11) is attached to the support table (2e) substantially in the center thereof with its inner surface facing downward. (12) is a photosensitive film formed on the inner surface of the face panel (11), which is obtained by applying a slurry in which a phosphor is dispersed in a photosensitive resin and then drying the slurry. Reference numeral (13) is a shadow mask having a mask hole (13a), which is detachably attached to the face panel (11) at a predetermined distance from the photosensitive film (12) of the face panel (11).

つぎに、上記構成の露光装置の一使用例を第5図にもと
づいて説明する。
Next, an example of use of the exposure apparatus having the above configuration will be described with reference to FIG.

フエースパネル(11)の内面に3色モザイク状の蛍光面
を作成する場合には、まず3色蛍光体のうち、1色だけ
の蛍光体の感光膜(12)をフエースパネル(11)の内面
に塗布し、乾燥させてから所定位置にシヤドウマスク
(13)を取付ける。
When creating a three-color mosaic phosphor screen on the inner surface of the face panel (11), first of all, the photosensitive film (12) of only one color of the three-color phosphor is used on the inner surface of the face panel (11). After applying to the above, and drying it, attach the shadow mask (13) at a predetermined position.

つぎに、その色に対応する光線(6)の軌道に合わせた
位置に移動させた線光源(5)から放射された光線を、
シヤドウマスク(13)のマスク孔(13a)を通してフエ
ースパネル(11)の感光膜(12)の全面にわたつて点状
に露光し、現像して1色目の蛍光面パターンを形成す
る。なお、他の2色の蛍光時には、シヤドウマスク(1
3)を取外し、上記作業を繰り返せばよい。
Next, the light beam emitted from the linear light source (5) moved to a position corresponding to the trajectory of the light beam (6) corresponding to the color,
Through the mask hole (13a) of the shear mask (13), dot-wise exposure is performed over the entire surface of the photosensitive film (12) of the face panel (11), and development is performed to form a phosphor screen pattern of the first color. When the other two colors of fluorescence are used, the shadow mask (1
3) Remove and repeat the above work.

[発明が解決しようとする問題点] カラー陰極線管の蛍光面作成用露光装置の光源として、
直管形の超高圧水銀灯を用いた場合には、これが線光源
であるため、線光源(5)から放射された光線(6)を
光量補正フイルタ(8)、および光偏向補正レンズ
(9),(10)を経てシヤドウマスク(13)のマスク孔
(13a)からフエースパネル(11)の感光膜(12)の全
面にわたつて点状に露光させた場合、シヤドウマスク
(13)の一つのマスク孔(13a)から感光膜(12)に露
光された露光形状は、第6図の露光動作説明図に示すよ
うに、線光源(5)の長手方向に半径寸法の長い楕円形
露光(14)となる。
[Problems to be Solved by the Invention] As a light source of an exposure apparatus for creating a fluorescent screen of a color cathode ray tube,
When a straight tube type ultra-high pressure mercury lamp is used, since this is a line light source, the light beam (6) emitted from the line light source (5) is used as a light quantity correction filter (8) and a light deflection correction lens (9). , (10) through the mask hole (13a) of the shear mask (13) over the entire surface of the photosensitive film (12) of the face panel (11) to form a dot-like exposure, one mask hole of the shear mask (13) The exposure shape of the photosensitive film (12) exposed from (13a) is an elliptical exposure (14) having a long radius in the longitudinal direction of the line light source (5) as shown in the exposure operation explanatory diagram of FIG. Become.

したがって、フエースパネル(11)の感光膜(12)に形
成される3色の多数の蛍光点が互いに近接し過ぎたり、
離れ過ぎて正確な蛍光面が作成できないため、色むら,
色ずれおよび混色等が生じ、カラー陰極線管の品質が低
下するという問題があった。
Therefore, many fluorescent points of three colors formed on the photosensitive film (12) of the face panel (11) are too close to each other, or
Since it is too far away to create an accurate fluorescent screen, color unevenness,
There has been a problem that color misregistration and color mixing occur and the quality of the color cathode ray tube deteriorates.

この発明は上記の問題を解消するためになされたもの
で、線光源自体による楕円形露光を矯正して所定の蛍光
面パターンを正確に作成することができるカラー陰極線
管の蛍光面作成用露光装置を提供することを目的とす
る。
The present invention has been made to solve the above problems, and an exposure apparatus for creating a fluorescent screen of a color cathode ray tube capable of correcting an elliptical exposure by the linear light source itself to accurately create a predetermined fluorescent screen pattern. The purpose is to provide.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に系るカラー陰極線管の蛍光面作成用露光装置
は、線光源をX,Y方向に同時に移動可能に支持するとと
もに、この線光源に一体に設けた駆動板に楕円環状溝が
形成され、この楕円環状溝内に摺動自在に嵌合する駆動
子が上記線光源の中心部の延長線上の軸心周りに駆動回
転自在に設けられたクランクアームの自由端部に取り付
けられ、このクランクアームの駆動回転により上記線光
源を楕円運動させるように構成したことを特徴とする。
An exposure apparatus for creating a fluorescent screen of a color cathode ray tube according to the present invention supports a linear light source so as to be simultaneously movable in the X and Y directions, and an elliptical annular groove is formed in a drive plate integrally provided with this linear light source. A drive element slidably fitted in the elliptical annular groove is attached to a free end portion of a crank arm which is rotatably provided around an axis on an extension line of the central portion of the linear light source. It is characterized in that the linear light source is caused to make an elliptical motion by driving rotation of the arm.

〔作用〕[Action]

この発明によれば、クランクアームを駆動回転させる
と、該クランクアームの自由端部に取り付けられた駆動
子およびこの駆動子が嵌合する楕円環状溝を有する駆動
板を介して線光源がX,Y方向に同時に移動して楕円運動
することになる。したがって、フェースパネルの感光膜
に対する露光は、線光源自体による楕円形露光が、この
線光源の楕円運動に重なるために、真円に近い円形露光
形状に矯正される状態で所定の露光動作が行なわれる。
According to the present invention, when the crank arm is driven and rotated, the linear light source X, through the drive element attached to the free end of the crank arm and the drive plate having the elliptical annular groove into which the drive element is fitted, It moves in the Y direction at the same time and makes an elliptic motion. Therefore, in the exposure of the photosensitive film of the face panel, the elliptical exposure by the linear light source itself overlaps the elliptic movement of the linear light source, so that the predetermined exposure operation is performed in a state where the elliptical exposure is corrected to a circular exposure shape close to a perfect circle. Be done.

[発明の実施例] 以下、この発明の一実施例を図面にもとづいて説明す
る。
[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

第1図は、この発明の一実施例によるカラー陰極線管の
蛍光面作成用露光装置を示す概略正面図であり、同図に
おいて、第5図に示す従来のものと同一または相当部分
には、同一の符号を付して、その詳細な説明は省略す
る。
FIG. 1 is a schematic front view showing an exposure apparatus for forming a fluorescent screen of a color cathode ray tube according to an embodiment of the present invention. In FIG. 1, the same or corresponding portions as those of the conventional one shown in FIG. The same reference numerals are given and detailed description thereof is omitted.

第1図において、(15)は露光装置(4)を楕円運動さ
せる駆動装置、(16)は駆動モータで、減速歯車装置
(17)、およびこれの出力軸(17a)を介して上記駆動
装置(15)の駆動する。
In FIG. 1, (15) is a drive device for causing the exposure device (4) to make an elliptical motion, (16) is a drive motor, and the drive device is provided via a reduction gear device (17) and an output shaft (17a) thereof. Drive (15).

第2図は上記駆動装置(15)の拡大平面図、第3図は要
部を断面にした駆動装置(15)の拡大正面図であり、同
図において、(18a),(18b)は一対のY軸ガイドバー
で、2組の支柱(19a),(19b)および(20a)(20b)
により、所定間隔をあけて互いに平行に支持台(2a)上
に取付けられている。(21a),(21b)は一対の支持ス
ライダで、上記Y軸ガイドバー(18a),(18b)に、そ
れぞれY軸方向に摺動自在に支持されている。(22
a),(22b)は一対のX軸ガイドバーで、所定間隔をあ
けて互いに平行に上記両支持スライダ(21a),(21b)
にまたがつてこれに取付けられており、このX軸ガイド
バー(22a),(22b)には上記露光装置(4)のケース
(4a)がX軸方向に摺動自在に支持されている。
FIG. 2 is an enlarged plan view of the drive unit (15), and FIG. 3 is an enlarged front view of the drive unit (15) in which a main part is shown in a cross section. In FIG. 2, (18a) and (18b) are a pair. Y-axis guide bar of 2 sets of columns (19a), (19b) and (20a) (20b)
Are mounted on the support base (2a) in parallel with each other at a predetermined interval. (21a) and (21b) are a pair of support sliders, which are slidably supported in the Y-axis direction by the Y-axis guide bars (18a) and (18b). (twenty two
a) and (22b) are a pair of X-axis guide bars, which are parallel to each other and are spaced apart by a predetermined distance.
The case (4a) of the exposure apparatus (4) is slidably supported in the X-axis direction on the X-axis guide bars (22a) and (22b).

つぎに、(23)は駆動板であり、底面には所定深さの楕
円環境溝(24)が形成されるとともに、上記露光装置
(4)のケース(4a)の底面中心部に一体に取付けられ
ている。(25)はクランクアームで、上記減速歯車装置
(17)の出力軸の上端部に一体に取り付けられている。
(26)は駆動子であり、上記クランクアーム(25)の自
由端部に植設されたピン(27)と、このピン(27)にボ
ールベアリング(28)を介して取付けられたローラ(2
9)とによつて形成されている。
Next, (23) is a drive plate, and an elliptical environment groove (24) of a predetermined depth is formed on the bottom surface, and it is integrally attached to the center of the bottom surface of the case (4a) of the exposure apparatus (4). Has been. Reference numeral (25) is a crank arm, which is integrally attached to the upper end portion of the output shaft of the reduction gear device (17).
Reference numeral (26) denotes a driver, which includes a pin (27) implanted at the free end of the crank arm (25) and a roller (2) attached to the pin (27) via a ball bearing (28).
9) is formed by.

つぎに、上記構成の露光装置の動作について説明する。Next, the operation of the exposure apparatus having the above configuration will be described.

第1図は、カラー陰極線管のフエースパネル(11)を支
持台(2e)上にセツトして、露光装置による露光作業前
の状態を示している。
FIG. 1 shows a state before the exposure work by the exposure apparatus with the face panel (11) of the color cathode ray tube set on the support base (2e).

いま、駆動モータ(16)を起動し、減速歯車装置(17)
および出力軸(17a)を介してクランクアーム(25)を
回転させると、このクランクアーム(25)の駆動子(2
6)は、駆動板(23)の楕円環状溝(24)内を摺動しな
がら移動するため、この駆動子(26)と一体をなす露光
装置(4)は、X軸ガイドバー(22a),(22b)の軸方
向と、Y軸ガイドバー(18a),(18b)の軸方向には移
動してもこれら各ガイドバーによつて回転を阻止されて
いるため、この露光装置(4)の線光源(5)は、回転
することなく、楕円環状溝(24)の楕円形状と同一の楕
円軌跡を画きながら楕円運動を行ない、フエースパネル
(11)の感光膜(12)に所定の露光動作を行なう。
Now, start the drive motor (16) and reduce the gear unit (17).
When the crank arm (25) is rotated via the output shaft (17a) and the drive shaft (2) of the crank arm (25).
Since 6) moves while sliding in the elliptical annular groove (24) of the drive plate (23), the exposure device (4) integrated with the driver (26) is provided with an X-axis guide bar (22a). , (22b) in the axial direction and the Y-axis guide bars (18a), (18b) in the axial direction, the rotation is blocked by each of these guide bars. The linear light source (5) makes an elliptical motion while drawing the same elliptical locus as the elliptical shape of the elliptical annular groove (24) without rotating, and the photosensitive film (12) of the face panel (11) is exposed to a predetermined exposure. Take action.

以上説明した露光動作により、フエースパネル(11)の
感光膜(12)に対する露光は、第4図の露光動作説明図
に示すように、線光源(5)自体による楕円形露光(1
4)が、線光源(5)の楕円運動(29)によって重な
り、結果としてほぼ真円に近い円形露光(30)に矯正さ
れた状態で所定の露光動作が終了し、出力軸(17a)の
回転が停止する。
By the exposure operation described above, the exposure of the photosensitive film (12) of the face panel (11) is performed by the elliptical exposure (1) by the line light source (5) itself as shown in the exposure operation explanatory diagram of FIG.
4) is overlapped by the elliptic movement (29) of the linear light source (5), and as a result, the predetermined exposure operation is completed in a state where the circular exposure (30) is corrected to a nearly perfect circle, and the output shaft (17a) The rotation stops.

[発明の効果] 以上のように、この発明によれば、線光源を強制的に楕
円運動させることによって、線光源自体による楕円形露
光が、その線光源の楕円運動によって重なり、フェース
パネルの感光膜に対する露光を真円に近い円形露光形状
に矯正することができる。したがって、3色の多数の蛍
光点から形成される蛍光面パターンを、各蛍光点同士が
互いに近づき過ぎたり、離れ過ぎたりしないように、正
確に作成することができ、これによって、色むら、色ず
れおよび混色等を発生させない高品質のカラー陰極線管
を得ることができるという効果を奏する。
[Effects of the Invention] As described above, according to the present invention, the elliptical exposure of the line light source itself is overlapped by the elliptical motion of the line light source by forcibly causing the line light source to move in an elliptical motion, and the face panel is exposed to light. The exposure on the film can be corrected to a circular exposure shape that is close to a perfect circle. Therefore, it is possible to accurately create a phosphor screen pattern formed from a large number of fluorescent points of three colors so that the fluorescent points do not come too close to each other or too far away from each other, which results in uneven color and color. It is possible to obtain a high-quality color cathode ray tube that does not cause misregistration and color mixing.

【図面の簡単な説明】[Brief description of drawings]

第1図はこの発明の一実施例によるカラー陰極線管の蛍
光面作成用露光装置の概略正面図、第2図は駆動装置の
拡大平面図、第3図は駆動装置の要部を断面にして示す
拡大正面図、第4図はこの発明の露光装置による露光動
作説明図、第5図は従来のカラー陰極線管の蛍光面作成
用露光装置の概略正面図、第6図は従来の露光装置によ
る露光動作説明図である。 (4)……露光装置、(5)……線光源、(8)……光
量補正フイルタ、(9),(10)……光偏向補正レン
ズ、(11)……フエースパネル、(12)……感光膜、
(13)……シヤドウマスク、(13a)……マスク孔、(2
3)……駆動板、(24)……楕円環状溝、(25)……ク
ランクアーム、(26)……駆動子、(27)……ピン、
(28)……ボールベアリング、(29)……ローラ。 なお、図中、同一符号は、同一または相当部分を示す。
FIG. 1 is a schematic front view of an exposure apparatus for producing a phosphor screen of a color cathode ray tube according to an embodiment of the present invention, FIG. 2 is an enlarged plan view of a driving apparatus, and FIG. 3 is a sectional view of a main portion of the driving apparatus. FIG. 4 is an enlarged front view showing the exposure operation of the exposure apparatus of the present invention, FIG. 5 is a schematic front view of an exposure apparatus for creating a fluorescent screen of a conventional color cathode ray tube, and FIG. 6 is a conventional exposure apparatus. It is an exposure operation explanatory drawing. (4) ... Exposure device, (5) ... Line light source, (8) ... Light quantity correction filter, (9), (10) ... Light deflection correction lens, (11) ... Face panel, (12) ...... Photosensitive film,
(13) …… Shadow mask, (13a) …… Mask hole, (2
3) …… Drive plate, (24) …… Oval ring groove, (25) …… Crank arm, (26) …… Drive element, (27) …… Pin,
(28) …… Ball bearings, (29) …… Rollers. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】光量補正フィルタ、光偏向補正レンズおよ
びシャドウマスクのマスク孔を通して、フェースパネル
の感光膜に蛍光面パターンを形成する線光源を備えたカ
ラー陰極線管の蛍光面作成用露光装置において、上記線
光源をX,Y方向に同時に移動可能に支持するとともに、
この線光源に一体に設けた駆動板に楕円環状溝が形成さ
れ、この楕円環状溝内に摺動自在に嵌合する駆動子が上
記線光源の中心部の延長線上の軸心周りに駆動回転自在
に設けられたクランクアームの自由端部に取り付けら
れ、このクランクアームの駆動回転により上記線光源を
楕円運動させるように構成したことを特徴とするカラー
陰極線管の蛍光面作成用露光装置。
1. An exposure apparatus for forming a fluorescent screen of a color cathode ray tube, comprising a linear light source for forming a fluorescent screen pattern on a photosensitive film of a face panel through a light quantity correction filter, a light deflection correction lens and a mask hole of a shadow mask, While supporting the above linear light source so that it can move simultaneously in the X and Y directions,
An elliptical annular groove is formed on a drive plate integrally provided with the linear light source, and a driver element slidably fitted in the elliptical annular groove is driven to rotate around an axis on an extension line of the central portion of the linear light source. An exposure apparatus for forming a fluorescent screen of a color cathode ray tube, which is attached to a free end of a freely provided crank arm, and is configured to cause the linear light source to make an elliptical motion by driving rotation of the crank arm.
【請求項2】上記線光源が、直管形の超高圧水銀灯であ
る特許請求の範囲第1項記載のカラー陰極線管の蛍光面
作成用露光装置。
2. An exposure apparatus for producing a fluorescent screen of a color cathode ray tube according to claim 1, wherein the linear light source is a straight tube type ultra high pressure mercury lamp.
【請求項3】上記駆動子は、クランクアームの自由端部
に植設されたピンと、このピンにボールベアリングを介
して回転自在に取り付けたローラとから構成されている
特許請求の範囲第1項記載のカラー陰極線管の蛍光面作
成用露光装置。
3. The drive element according to claim 1, wherein the driver element is composed of a pin implanted at a free end portion of a crank arm and a roller rotatably attached to the pin via a ball bearing. An exposure apparatus for producing a fluorescent screen of the color cathode ray tube described.
JP11276087A 1987-05-09 1987-05-09 Exposure device for creating fluorescent screen of color cathode ray tube Expired - Fee Related JPH0664990B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11276087A JPH0664990B2 (en) 1987-05-09 1987-05-09 Exposure device for creating fluorescent screen of color cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11276087A JPH0664990B2 (en) 1987-05-09 1987-05-09 Exposure device for creating fluorescent screen of color cathode ray tube

Publications (2)

Publication Number Publication Date
JPS63279538A JPS63279538A (en) 1988-11-16
JPH0664990B2 true JPH0664990B2 (en) 1994-08-22

Family

ID=14594848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11276087A Expired - Fee Related JPH0664990B2 (en) 1987-05-09 1987-05-09 Exposure device for creating fluorescent screen of color cathode ray tube

Country Status (1)

Country Link
JP (1) JPH0664990B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0664991B2 (en) * 1987-05-21 1994-08-22 三菱電機株式会社 Exposure device for creating fluorescent screen of color cathode ray tube

Also Published As

Publication number Publication date
JPS63279538A (en) 1988-11-16

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