JPH07120507B2 - Fluorescent film dryer - Google Patents

Fluorescent film dryer

Info

Publication number
JPH07120507B2
JPH07120507B2 JP1337446A JP33744689A JPH07120507B2 JP H07120507 B2 JPH07120507 B2 JP H07120507B2 JP 1337446 A JP1337446 A JP 1337446A JP 33744689 A JP33744689 A JP 33744689A JP H07120507 B2 JPH07120507 B2 JP H07120507B2
Authority
JP
Japan
Prior art keywords
fluorescent film
heater
heater element
surface temperature
temperature
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 - Lifetime
Application number
JP1337446A
Other languages
Japanese (ja)
Other versions
JPH03196444A (en
Inventor
哲郎 宮崎
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP1337446A priority Critical patent/JPH07120507B2/en
Publication of JPH03196444A publication Critical patent/JPH03196444A/en
Publication of JPH07120507B2 publication Critical patent/JPH07120507B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、カラー受像管の蛍光膜を形成する工程で用い
られる乾燥装置に関する。
The present invention relates to a drying device used in a step of forming a fluorescent film of a color picture tube.

〔従来の技術〕[Conventional technology]

カラー受像管では、パネル内面に各色、例えば青,緑,
赤の各蛍光膜パターンが所定の位置関係をもって塗り分
けられており、この蛍光膜から所定の間隔をへだてて、
シャドウマスクあるいはアパーチャーグリル等の色選択
用電極が取付けられ、これによって青,緑,赤に対応す
る電子ビームをそれぞれ蛍光膜上の対応する色の蛍光膜
パターン上に射突するようにしている。
In a color picture tube, each color such as blue, green,
Each red fluorescent film pattern is painted with a predetermined positional relationship, and a predetermined space is provided from this fluorescent film,
A color selection electrode such as a shadow mask or an aperture grill is attached so that the electron beams corresponding to blue, green and red are projected onto the fluorescent film patterns of the corresponding colors on the fluorescent film.

このようなカラー受像管の蛍光膜パターン形成の一般的
な方法としては、パネル内面を洗浄した後、通常下塗り
という、パネルと蛍光体との接着強度をもたせるため
に、ポリビニールアルコールを主成分とした液を塗布し
た後、乾燥を行ない、その上にポリビニールアルコール
とこれに感光性を付与し露光によって架橋反応を起こさ
せる重クロム酸塩、例えば、重クロム酸アンモニウム
と、青色蛍光体粉体を混合した蛍光体スラリーを塗布,
乾燥し、均一な膜を作る。この膜をシャドウマスクを通
して露光を行ない、青の電子ビームと対応する位置に架
橋反応を起させ、現像によって露光された位置に青の蛍
光膜パターンを作成する。この様な作業を繰返して、順
次、緑,赤の蛍光膜パターンを所定の配列で作成する。
As a general method of forming a fluorescent film pattern of such a color picture tube, after cleaning the inner surface of the panel, usually, undercoating, polyvinyl alcohol is used as a main component in order to have adhesive strength between the panel and the phosphor. After applying the above liquid, it is dried and polyvinyl alcohol and a dichromate that imparts photosensitivity to it and causes a crosslinking reaction by exposure, for example, ammonium dichromate, and a blue phosphor powder. Apply phosphor slurry mixed with
Dry to make a uniform film. This film is exposed through a shadow mask to cause a crosslinking reaction at a position corresponding to the blue electron beam, and a blue fluorescent film pattern is formed at the exposed position by development. By repeating such operations, green and red phosphor film patterns are sequentially formed in a predetermined arrangement.

上記方法によって蛍光膜を形成する場合、蛍光体スラリ
ー塗布後の乾燥工程では均一に乾燥することが重要であ
る。例えば、乾燥が強くなりずぎると、次工程の現像処
理がうまく出来ず、蛍光膜パターンを形成しているドッ
トまたはストライプが分離せず、いわゆる、かぶり現像
が生じ、逆に弱すぎると、前記ドットまたはストライプ
が落下し、蛍光膜パターンの一部が欠落してしまうとい
う現像が生じる不具合がある。このような不具合を生じ
させないように、蛍光体スラリー塗布後の乾燥を一定に
保つことが必要がある。
When the phosphor film is formed by the above method, it is important that the phosphor layer is uniformly dried in the drying step after coating. For example, if the dryness becomes too strong, the development process in the next step cannot be performed well, the dots or stripes forming the fluorescent film pattern are not separated, and so-called fog development occurs. Alternatively, there is a problem that development occurs in which stripes fall and a part of the fluorescent film pattern is lost. In order not to cause such a problem, it is necessary to keep the drying constant after applying the phosphor slurry.

従来、このような蛍光体スラリー塗布後の乾燥の熱源と
しては、第4図のブロック系統図のように、遠赤外線ヒ
ータ9を使用し、各色毎に複数ポジションに配列し、お
のおののポジションにおいては、パーセンテージタイマ
ー15により、一定時間、例えば15秒を100%とし、マグ
ネットスイッチ14を制御し、設定パーセンテージの時間
だけ、遠赤外線ヒータ9に通電,発熱させ、これを繰返
すことにより、又、複数ポジションでこの様な設定を
し、これらの乾燥部をパネルが連続的に通過することに
より乾燥されるようになっていた。
Conventionally, as a heat source for drying after applying such a phosphor slurry, a far infrared heater 9 is used as shown in the block system diagram of FIG. 4, arranged in a plurality of positions for each color, and at each position. By setting the percentage timer 15 to 100% for a fixed period of time, for example, 15 seconds, the magnet switch 14 is controlled, the far infrared heater 9 is energized and heated for a set percentage of time, and this is repeated. The above settings were made so that the panel was dried by continuously passing through these drying sections.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

上述した従来の乾燥装置は、制御電源からの通電,遮断
信号の繰返しにより発熱の程度を制御するもので、各ポ
ジションに設置された1本,1本の遠赤外線ヒータエレメ
ントの性能上の偏差、すなわち、エレメントの電気抵抗
値の偏差により、表面温度に差が出る。これにより、パ
ネルに与えられるヒータよりの放射エネルギが不安定に
なる欠点があった。
The conventional drying device described above controls the degree of heat generation by repeating the energization and cutoff signals from the control power source, and the performance deviation of one or one far-infrared heater element installed at each position, That is, a difference occurs in the surface temperature due to the deviation of the electric resistance value of the element. As a result, the radiant energy from the heater applied to the panel becomes unstable.

〔課題を解決するための手段〕[Means for Solving the Problems]

上記課題に対し本発明は、このような、乾燥の不安定さ
の欠点を除去するものであり、乾燥装置を通過する蛍光
体スラリーの塗布されたパネルに一様な放射エネルギー
を与えるために、複数ポジションに分散設置した遠赤外
線ヒータエレメントに対し、各ヒータエレメントの表面
に接触させた温度検出器を設け、さらにヒータエレメン
トの表面温度設定器と、P.I.D.(proportional,integra
l and derivative)制御ユニットとを備えしめて、ヒー
タエレメントの表面温度を一定値に制御している。
The present invention against the above problems, such as to eliminate the disadvantage of instability of drying, in order to give a uniform radiant energy to the panel coated with the phosphor slurry passing through the drying device, For the far-infrared heater elements distributed and installed at multiple positions, a temperature detector is provided in contact with the surface of each heater element.
and a control unit for controlling the surface temperature of the heater element to a constant value.

赤外線の放射強度,スペクトル分布及び温度の関係はPl
ankの法則で表わされる。すなわち、 ここでWλは単位面積当り、単位波長間隔当り、波長λ
で、放出される放射線量(W/cm2)、Tは、放射体の絶
対温度(°K)、λは放出される放射線の波長(cm)、
C1およびC2は定数。
The relationship between infrared radiation intensity, spectral distribution and temperature is Pl
It is expressed by the law of ank. That is, Where W λ is per unit area, per unit wavelength interval,
Is the radiation dose emitted (W / cm 2 ), T is the absolute temperature of the radiator (° K), λ is the wavelength of the emitted radiation (cm),
C 1 and C 2 are constants.

これにより、各ヒータエレメントの表面温度Tを所望の
一定値に保つことにより、Wλ,放射線量が一定とな
り、安定した乾燥が行なわれる。
As a result, by keeping the surface temperature T of each heater element at a desired constant value, W λ and the radiation dose become constant, and stable drying is performed.

〔実施例〕〔Example〕

つぎに本発明について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.

第1図は、本発明の一実施例に係る蛍光膜塗布装置の1
部の斜視図である。第1図において、上部レール1,下部
レール2,及びスラストレール3に懸架され、かつ連続な
チェーン4にパネルを搭載するキャリア6が自転可能
で、かつ傾斜支点7を中心にリードレール8に沿って、
傾斜する様に取付けられて、ある周期時間のもとに間欠
運動するものである。
FIG. 1 shows a fluorescent film coating apparatus 1 according to an embodiment of the present invention.
It is a perspective view of a part. In FIG. 1, a carrier 6 that is suspended by an upper rail 1, a lower rail 2, and a thrust rail 3 and that mounts a panel on a continuous chain 4 is rotatable and runs along a lead rail 8 around an inclined fulcrum 7. hand,
It is installed so as to incline and intermittently moves under a certain cycle time.

第2図は、塗布装置のキャリア6の停止位置に相対して
設置されるヒータユニットであり、複数本の遠赤外線ヒ
ータエレメント9を有し、各エレメントには表面温度検
出器10が取付けられている。
FIG. 2 shows a heater unit installed opposite to the stop position of the carrier 6 of the coating apparatus, which has a plurality of far-infrared heater elements 9 and a surface temperature detector 10 attached to each element. There is.

第3図は、制御部のブロック系統図であり、ヒータエレ
メント表面温度設定器11による設定基準温度と、ヒータ
エレメントの表面温度検出器10との値の差によりPID制
御ユニット12が作動し、電源ユニット13へ信号を送り、
前記検出温度と設定器の設定温度の差が零になるように
ヒータエレメントに通電され、ヒータエレメントの表面
温度を設定器の設定温度を保持するように制御する。
FIG. 3 is a block system diagram of the controller, in which the PID control unit 12 operates due to the difference between the reference temperature set by the heater element surface temperature setting device 11 and the surface temperature detector 10 of the heater element, and the power supply is turned on. Send a signal to unit 13,
The heater element is energized so that the difference between the detected temperature and the set temperature of the setter becomes zero, and the surface temperature of the heater element is controlled so as to maintain the set temperature of the setter.

〔発明の効果〕〔The invention's effect〕

以上説明したように本発明は、パネル内面に塗布された
感光性蛍光体スラリーからなる感光性の蛍光膜を乾燥さ
せるための遠赤外線を発生するヒータエレメントの表面
温度を一定にすることにより、前記パネルの感光性の蛍
光膜へ一定の放射量が与えられ、パネル毎の蛍光膜の乾
燥の差を低減することが出来、高品質の蛍光膜が形成さ
れ、工程の安定化が達成でき、品質向上、歩留向上の効
果が大である。
As described above, the present invention makes the surface temperature of the heater element that generates far infrared rays for drying the photosensitive fluorescent film made of the photosensitive phosphor slurry applied to the inner surface of the panel constant, thereby A certain amount of radiation is given to the photosensitive phosphor film of the panel, the difference in drying of the phosphor film between panels can be reduced, a high quality phosphor film can be formed, and the stabilization of the process can be achieved. The effect of improving the yield and yield is great.

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

第1図は本発明の一実施例に係る蛍光膜塗布装置の一例
の部分斜視図、第2図は本発明の一実施例のヒータユニ
ットの斜視図、第3図は本発明の一実施例の制御系統を
示すブロック系統図、第4図は従来の乾燥装置のブロッ
ク系統図である。 1……上部レール、2……下部レール、3……スラスト
レール、4……チェーン、5……パネル、6……キャリ
ア、7……傾斜支点、8……リードレール、9……ヒー
タエレメント、10……表面温度検出器、11……表面温度
設定器、12……PID制御ユニット、13……電源ユニッ
ト。
FIG. 1 is a partial perspective view of an example of a fluorescent film coating apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a heater unit of an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a block system diagram showing the control system of FIG. 4, and FIG. 4 is a block system diagram of a conventional drying device. 1 ... Top rail, 2 ... Bottom rail, 3 ... Thrust rail, 4 ... Chain, 5 ... Panel, 6 ... Carrier, 7 ... Inclination fulcrum, 8 ... Lead rail, 9 ... Heater element , 10 …… Surface temperature detector, 11 …… Surface temperature setter, 12 …… PID control unit, 13 …… Power supply unit.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】間欠運動するキャリアに搭載されたパネル
の内面に塗布された感光性蛍光体スラリーからなる感光
性の蛍光膜を乾燥するため所定位置で停止させ、前記所
定位置に対向してヒータユニットを固定配置するカラー
受像管用蛍光膜の乾燥装置において、前記ヒータユニッ
トは前記所定位置に移動された前記パネルの塗布蛍光体
面に乾燥用遠赤外線を照射する複数個の遠赤外線ヒータ
エレメントと、前記各ヒータエレメントの表面温度を検
出する検出器と、基準温度の設定器および前記検出器で
検出された温度と前記基準温度とを比較して前記ヒータ
エレメントの表面温度を一定に保持する制御ユニットを
含むヒータエレメントの表面温度制御装置とを備えたこ
とを特徴とする蛍光膜の乾燥装置。
1. A heater which is stopped at a predetermined position to dry a photosensitive fluorescent film made of a photosensitive phosphor slurry applied to the inner surface of a panel mounted on a carrier which moves intermittently, and which faces the predetermined position. In a drying device for a color picture tube fluorescent film in which a unit is fixedly arranged, the heater unit includes a plurality of far-infrared heater elements for irradiating a drying far-infrared ray on a coating phosphor surface of the panel moved to the predetermined position, A detector that detects the surface temperature of each heater element, a reference temperature setter, and a control unit that compares the temperature detected by the detector with the reference temperature to keep the surface temperature of the heater element constant. And a heater element surface temperature control device including the same.
JP1337446A 1989-12-25 1989-12-25 Fluorescent film dryer Expired - Lifetime JPH07120507B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1337446A JPH07120507B2 (en) 1989-12-25 1989-12-25 Fluorescent film dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1337446A JPH07120507B2 (en) 1989-12-25 1989-12-25 Fluorescent film dryer

Publications (2)

Publication Number Publication Date
JPH03196444A JPH03196444A (en) 1991-08-27
JPH07120507B2 true JPH07120507B2 (en) 1995-12-20

Family

ID=18308711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1337446A Expired - Lifetime JPH07120507B2 (en) 1989-12-25 1989-12-25 Fluorescent film dryer

Country Status (1)

Country Link
JP (1) JPH07120507B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013126716A1 (en) 2012-02-24 2013-08-29 Itip Development, Llc Patent life cycle management system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0815581B2 (en) * 1986-10-23 1996-02-21 株式会社ノリタケカンパニーリミテド Coating dryer equipped with far infrared panel type heater

Also Published As

Publication number Publication date
JPH03196444A (en) 1991-08-27

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