JPH07296738A - Color cathode-ray tube - Google Patents

Color cathode-ray tube

Info

Publication number
JPH07296738A
JPH07296738A JP8668394A JP8668394A JPH07296738A JP H07296738 A JPH07296738 A JP H07296738A JP 8668394 A JP8668394 A JP 8668394A JP 8668394 A JP8668394 A JP 8668394A JP H07296738 A JPH07296738 A JP H07296738A
Authority
JP
Japan
Prior art keywords
mask frame
mask
shadow mask
frame
tension
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.)
Pending
Application number
JP8668394A
Other languages
Japanese (ja)
Inventor
Jun Araya
純 荒谷
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP8668394A priority Critical patent/JPH07296738A/en
Publication of JPH07296738A publication Critical patent/JPH07296738A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a mask frame from being deformed due to tension of a shadow mask, prevent the shadow mask tension from decreasing in a heat treatment process, and improve color reproductivity. CONSTITUTION:A shadow mask body is composed of an L-sectional mask frame 6 and a shadow mask 5, which is provided with a plurality of holes and tensioned on the mask frame 6 in its tensioned state. A flat member 8 having a thermal expansion coefficient smaller than the thermal expansion coefficient of the mask frame 6 is provided in the inside of the mask frame 6 and both ends of the member are fixed to the side face 6a and the rear face 6b of the mask frame 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、テレビジョン受像機や
ディスプレイ等に用いるカラー陰極線管に関し、特にシ
ャドウマスクがマスクフレームに架張されたシャドウマ
スク構体を備えたカラー陰極線管に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color cathode ray tube used for a television receiver, a display and the like, and more particularly to a color cathode ray tube having a shadow mask structure in which a shadow mask is stretched on a mask frame.

【0002】[0002]

【従来の技術】カラー陰極線管は、電子銃から出射した
電子ビームがシャドウマスクの孔を通過してパネル内面
に形成された蛍光スクリーン面にランディングし、蛍光
体を発光させる。しかしながら、シャドウマスクの孔を
通過する電子ビームは全体のうち約20%であり、残り
の約80%の電子ビームはシャドウマスクに射突し、シ
ャドウマスクの温度を上昇させ、これに熱膨張による熱
変形を引き起こす。シャドウマスクが熱変形を起こす
と、シャドウマスクと蛍光スクリーン面との位置的な整
合関係にずれが生じ、色再現性を低下させるという問題
があった。
2. Description of the Related Art In a color cathode ray tube, an electron beam emitted from an electron gun passes through a hole in a shadow mask and lands on a fluorescent screen surface formed on the inner surface of a panel to cause a phosphor to emit light. However, about 20% of all electron beams pass through the holes of the shadow mask, and the remaining about 80% of the electron beams impinge on the shadow mask to raise the temperature of the shadow mask, which causes thermal expansion. Causes thermal deformation. When the shadow mask is thermally deformed, the positional alignment relationship between the shadow mask and the fluorescent screen surface is deviated, and there is a problem that the color reproducibility is deteriorated.

【0003】この対策として、従来、シャドウマスク
を、張力を与えた状態でマスクフレームにこのマスクフ
レームとリボン状枠とで挟持したシャドウマスク構体を
用いたカラー陰極線管が知られている(特開昭61−8
0735号公報)。
As a countermeasure against this, conventionally, there is known a color cathode ray tube using a shadow mask structure in which a shadow mask is sandwiched between the mask frame and a ribbon-shaped frame in a tensioned state (Japanese Patent Laid-Open No. 2000-242242). Sho 61-8
0735).

【0004】[0004]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のカラー陰極線管では、シャドウマスクを、張
力を与えた状態でマスクフレームに固着するため、シャ
ドウマスクの張力によりマスクフレームが内側にたわん
で変形を起こして、所定の張力が得られず、しかも、製
造時、熱処理工程においてシャドウマスク構体が加熱さ
れることにより、シャドウマスク素体の弾性限界は低下
するが、シャドウマスクは張力が与えられたままで加熱
されるために、高温時にはその張力が弾性限界を越えて
塑性変形を起こしてしまい、熱処理工程終了後にはシャ
ドウマスクの張力が低下して所定の張力が得られないと
いう問題があった。さらに、張力の不均一性によって、
しわやマスクピッチにむらが発生し、色の不純性などの
カラー陰極線管の性能劣化を引き起こすという問題があ
った。
However, in such a conventional color cathode ray tube, since the shadow mask is fixed to the mask frame under tension, the tension of the shadow mask causes the mask frame to bend inward. Due to deformation, the prescribed tension cannot be obtained, and the elastic limit of the shadow mask body is lowered by heating the shadow mask structure during the heat treatment process during manufacturing, but tension is applied to the shadow mask. Since it is heated as it is, its tension exceeds the elastic limit at the time of high temperature and plastic deformation occurs, and the tension of the shadow mask decreases after the heat treatment process and there is a problem that the prescribed tension cannot be obtained. . Furthermore, due to the non-uniformity of tension,
There is a problem in that wrinkles and unevenness in the mask pitch occur, causing performance deterioration of the color cathode ray tube such as color impurities.

【0005】本発明は、シャドウマスクを所定の張力で
マスクフレームに固着でき、しかも、熱処理工程による
シャドウマスクの張力の低下を防止でき、張力の不均一
性によるしわやマスクピッチのむらを防止し、色再現性
の良いカラー陰極線管を提供するものである。
According to the present invention, the shadow mask can be fixed to the mask frame with a predetermined tension, the tension of the shadow mask can be prevented from lowering due to the heat treatment process, and wrinkles and unevenness of the mask pitch due to uneven tension can be prevented. The present invention provides a color cathode ray tube with good color reproducibility.

【0006】[0006]

【課題を解決するための手段】本発明のカラー陰極線管
は、断面ほぼL字状のマスクフレームと、多数の孔が配
設され、かつ張力を与えられた状態で前記マスクフレー
ムに架張されたシャドウマスクとからなるシャドウマス
ク構体を備え、前記マスクフレームの内側に前記マスク
フレームの熱膨張係数より小さい熱膨張係数を有する板
状の部材が設けられており、前記部材の両端部は前記マ
スクフレームの側面および背面に固着されているもので
ある。
A color cathode ray tube according to the present invention is provided with a mask frame having a substantially L-shaped cross section, a large number of holes, and a tension applied to the mask frame. And a plate-shaped member having a coefficient of thermal expansion smaller than that of the mask frame is provided inside the mask frame, and both ends of the member are masks. It is fixed to the side and back of the frame.

【0007】また、本発明のカラー陰極線管は、断面ほ
ぼL字状のマスクフレームと、多数の孔が配設され、か
つ張力を与えられた状態で前記マスクフレームに架張さ
れたシャドウマスクとからなるシャドウマスク構体を備
え、前記マスクフレームの内側に前記マスクフレームの
熱膨張係数より小さい熱膨張係数を有する三角柱状の部
材が設けられており、前記部材の相隣る両面部は前記マ
スクフレームの側面および背面に固着されているもので
ある。
The color cathode ray tube of the present invention comprises a mask frame having a substantially L-shaped cross section, and a shadow mask having a large number of holes and tensioned to the mask frame. And a triangular prism-shaped member having a coefficient of thermal expansion smaller than that of the mask frame is provided inside the mask frame, and adjacent both sides of the member are the mask frame. It is fixed to the side and back of the.

【0008】[0008]

【作用】かかる構成により、シャドウマスクの張力によ
るたわみ変形を防止できて、シャドウマスクを所定の張
力でマスクフレームに固着することができる。また、製
造時、熱処理工程における高温時にはマスクフレームの
熱膨張に比してマスクフレームの内側に設けた部材の熱
膨張が小さいため、マスクフレームは内側にたわんで、
シャドウマスクの張力がゆるむ。その結果、シャドウマ
スクの張力は弾性限界を越えないため、塑性変形は起こ
らず、熱処理工程終了後にシャドウマスクの張力の低下
およびしわやマスクピッチのむらを防止することができ
る。
With this structure, the deformation of the shadow mask due to the tension can be prevented, and the shadow mask can be fixed to the mask frame with a predetermined tension. Further, at the time of high temperature in the heat treatment step during manufacturing, the thermal expansion of the member provided inside the mask frame is smaller than the thermal expansion of the mask frame, so the mask frame bends inside,
The tension of the shadow mask is loose. As a result, the tension of the shadow mask does not exceed the elastic limit, plastic deformation does not occur, and it is possible to prevent the tension of the shadow mask from lowering and wrinkles and unevenness of the mask pitch after the heat treatment process is completed.

【0009】[0009]

【実施例】以下、本発明の実施例について、図面を用い
て説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0010】図2に示すように、本発明実施例のカラー
陰極線管は、ファンネル1の後方部に内部に電子銃(図
示せず)を設けたネック部2を有し、またファンネル1
の前方部に均一な厚さを有する平面パネル3がガラス接
着剤4で接着されて一体化されている。ファンネル1、
ネック部2および平面パネル3からガラスバルブが構成
されている。そして、ガラスバルブ内にシャドウマスク
5とマスクフレーム6とからなるシャドウマスク構体7
が設けられている。シャドウマスク5は、図1に示すよ
うに、直径が約0.12mmの円形状の孔を約0.26
mmの間隔で多数配設した厚さ0.025mmの鋼板か
らなり、平面パネル3のウォール部11に支持固定され
たマスクフレーム6に、電子ビームの照射による熱変形
が発生しないように、約10kg/mm2の一様な張力が与
えられた状態で抵抗溶接またはレーザ溶接等により保持
固定されている。このシャドウマスク5は、平面パネル
3に接近かつ対向して設けられている。マスクフレーム
6は、断面がほぼL字状で、横333mm、縦256m
mに形成した鉄(熱膨張係数:約12.0×10-6[1
/℃])からなる(図3参照)。マスクフレーム6の内
側には、マスクフレーム6の熱膨張係数より小さな熱膨
張係数を有し、かつニッケルを42%含有する鉄−ニッ
ケル合金(熱膨張係数:約8.0×10-6[1/℃])
の平板状の部材8が設けられている。部材8の両端部
は、図1および図3に示すように、マスクフレーム6の
側面6aおよび背面6bに溶接等により固着されてい
る。
As shown in FIG. 2, the color cathode ray tube according to the embodiment of the present invention has a neck 2 having an electron gun (not shown) provided inside the funnel 1 and also the funnel 1.
A flat panel 3 having a uniform thickness is adhered to and integrated with a glass adhesive 4 in the front part of the. Funnel 1,
The neck portion 2 and the flat panel 3 constitute a glass bulb. The shadow mask structure 7 including the shadow mask 5 and the mask frame 6 is provided in the glass bulb.
Is provided. As shown in FIG. 1, the shadow mask 5 has a circular hole with a diameter of about 0.12 mm and a diameter of about 0.26 mm.
The mask frame 6 made of 0.025 mm-thick steel plates arranged in large numbers at intervals of 10 mm and supported and fixed to the wall portion 11 of the flat panel 3 has a thickness of about 10 kg so as not to be thermally deformed by the irradiation of the electron beam. It is held and fixed by resistance welding or laser welding with a uniform tension of / mm 2 applied . The shadow mask 5 is provided close to and opposite to the flat panel 3. The mask frame 6 has a substantially L-shaped cross section, and has a width of 333 mm and a length of 256 m.
Iron formed in m (coefficient of thermal expansion: about 12.0 × 10 -6 [1
/ ° C.]) (see FIG. 3). Inside the mask frame 6, an iron-nickel alloy having a coefficient of thermal expansion smaller than that of the mask frame 6 and containing 42% of nickel (coefficient of thermal expansion: about 8.0 × 10 −6 [1 / ° C])
The flat plate-shaped member 8 is provided. Both ends of the member 8 are fixed to the side surface 6a and the back surface 6b of the mask frame 6 by welding or the like, as shown in FIGS.

【0011】平面パネル3の内面には、蛍光体スクリー
ン9が形成されており、また平面パネル3の外面には、
厚さ0.05〜1.0mmのポリエステルフィルム等か
らなる樹脂シート10が接着剤で貼り付けられている。
この厚さの樹脂シート10を用いることにより、外部か
らの衝撃で爆縮した場合、ガラスの飛散を防ぐことがで
きる。
A phosphor screen 9 is formed on the inner surface of the flat panel 3, and an outer surface of the flat panel 3 is formed.
A resin sheet 10 made of a polyester film or the like having a thickness of 0.05 to 1.0 mm is attached with an adhesive.
By using the resin sheet 10 having this thickness, it is possible to prevent the glass from scattering when it is imploded by an impact from the outside.

【0012】また、平面パネル3の周辺部にこれとほぼ
直交するように形成されたウォール部11の外周面に
は、耐圧,爆縮対策として金属製の補強バンド12が取
付られている。
Further, a reinforcing band 12 made of metal is attached to the outer peripheral surface of the wall portion 11 formed in the peripheral portion of the flat panel 3 so as to be substantially orthogonal thereto, as a countermeasure against pressure and implosion.

【0013】以上のように、本発明実施例のカラー陰極
線管は、マスクフレーム6の内側に部材8を設け、この
部材の両端部をマスクフレーム6の側面6aおよび背面
6bに固着しているので、シャドウマスク5の張力によ
ってマスクフレーム6が内側にたわんで変形するのを防
止できる。また、製造時、熱処理工程においては、マス
クフレーム6の内側にこれより熱膨張係数の小さい部材
8が設けられているので、加熱されると、マスクフレー
ム6はバイメタル効果により内側にたわみ、シャドウマ
スク5の熱膨張に比してマスクフレーム6の熱膨張は相
対的に小さくなり、シャドウマスク5の張力はゆるみシ
ャドウマスク素体の弾性限界を越えることはなく、塑性
変形を防止できる。そして、熱処理工程終了時には、マ
スクフレーム6は冷却されるために、バイメタル効果に
より再びもとの形状に戻り、同時に、シャドウマスク5
も収縮してもとの形状に戻るため、張力は回復し、しわ
やマスクピッチのむらも発生しない。
As described above, in the color cathode ray tube of the embodiment of the present invention, the member 8 is provided inside the mask frame 6, and both ends of this member are fixed to the side surface 6a and the back surface 6b of the mask frame 6. It is possible to prevent the mask frame 6 from bending and deforming due to the tension of the shadow mask 5. Further, in the manufacturing process and the heat treatment process, since the member 8 having a smaller thermal expansion coefficient than the mask frame 6 is provided inside the mask frame 6, when heated, the mask frame 6 bends inside due to the bimetal effect, and the shadow mask The thermal expansion of the mask frame 6 is relatively smaller than the thermal expansion of the shadow mask 5, the tension of the shadow mask 5 is not loosened, and the elastic limit of the shadow mask body is not exceeded, so that plastic deformation can be prevented. At the end of the heat treatment process, since the mask frame 6 is cooled, it returns to its original shape due to the bimetal effect, and at the same time, the shadow mask 5
Even if it contracts, it returns to the original shape, so that the tension is recovered and wrinkles and unevenness of the mask pitch do not occur.

【0014】なお、上記実施例では、マスクフレーム6
として鉄、部材8として鉄−ニッケル合金を用いた場合
について説明したが、マスクフレームとしてはクロムを
18%含有する鉄−クロム合金(熱膨張係数:約11.
5×10-6[1/℃])を用いてもよく、また部材8と
してはニッケルを36%含有する鉄−ニッケル合金(イ
ンバー、熱膨張係数:約1.2×10-6[1/℃])
や、ニッケルを29%、コバルトを16%含有する鉄−
ニッケル−コバルト合金(コバール、熱膨張係数:約
6.0×10-6[1/℃])等のマスクフレーム6の熱
膨張係数より部材8の熱膨張係数が小さくなるような組
み合わせであれば同様の効果が得られる。
In the above embodiment, the mask frame 6
Although the case where iron is used as the member 8 and the iron-nickel alloy is used as the member 8, the mask frame is made of an iron-chromium alloy containing 18% of chromium (coefficient of thermal expansion: about 11.
5 × 10 −6 [1 / ° C.]) may be used, and the member 8 is an iron-nickel alloy containing 36% nickel (Invar, thermal expansion coefficient: about 1.2 × 10 −6 [1 / ° C.]) ℃])
Iron containing 29% nickel and 16% cobalt-
If the combination is such that the coefficient of thermal expansion of the member 8 is smaller than the coefficient of thermal expansion of the mask frame 6 such as nickel-cobalt alloy (Kovar, coefficient of thermal expansion: about 6.0 × 10 −6 [1 / ° C.]). The same effect can be obtained.

【0015】また、部材8としては、上記実施例に限ら
ず、例えば、図4に示すように平板板状の部材8を複数
用い、これらを所定の間隔をあけて配置し、それぞれの
部材の両端部をマスクフレーム6の側面6aおよび背面
6bに固着してもよい。この場合は、マスクフレーム6
が上記実施例のものに比して重量が軽くなり、またコス
トを低減できるという効果がある。さらに、部材8とし
ては、図5に示すように三角柱状の部材8を用い、この
相隣る両面部をマスクフレーム6の側面6aおよび背面
6bに固着してもよいし、また図6に示すように三角柱
状の部材8を複数用い、これらを所定の間隔をあけて配
置し、それぞれの部材の相隣る両面部をマスクフレーム
6の側面6aおよび背面6bに固着してもよい。
Further, the member 8 is not limited to the above-mentioned embodiment, and for example, as shown in FIG. 4, a plurality of flat plate-shaped members 8 are used, and these members are arranged at a predetermined interval, and the respective members are arranged. Both ends may be fixed to the side surface 6a and the back surface 6b of the mask frame 6. In this case, the mask frame 6
However, there is an effect that the weight is lighter than that of the above-mentioned embodiment and the cost can be reduced. Further, as the member 8, a triangular prism-shaped member 8 may be used as shown in FIG. 5, and both adjacent side surfaces may be fixed to the side surface 6a and the back surface 6b of the mask frame 6, or as shown in FIG. As described above, a plurality of triangular columnar members 8 may be used, and these members may be arranged at a predetermined interval, and adjacent two side surfaces of each member may be fixed to the side surface 6 a and the back surface 6 b of the mask frame 6.

【0016】[0016]

【発明の効果】以上説明したように、本発明によれば、
シャドウマスクを、所定の張力を与えた状態でマスクフ
レームに固着保持でき、しかも、製造時、熱処理工程に
おける張力の低下としわやマスクピッチのむらを防止で
き、色再現性の良いカラー陰極線管を提供することがで
きるものである。
As described above, according to the present invention,
Provides a color cathode ray tube with good color reproducibility, which can fix and hold the shadow mask on the mask frame with a predetermined tension applied, and can prevent tension decrease and wrinkle and mask pitch unevenness in the heat treatment process during manufacturing. Is what you can do.

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

【図1】本発明の一実施例であるカラー陰極線管におけ
るシャドウマスク構体の一部切欠拡大斜視図
FIG. 1 is a partially cutaway enlarged perspective view of a shadow mask structure in a color cathode ray tube according to an embodiment of the present invention.

【図2】本発明の一実施例であるカラー陰極線管の断面
FIG. 2 is a sectional view of a color cathode ray tube which is an embodiment of the present invention.

【図3】図1のIII−III線に沿って切断したシャドウマ
スク構体の拡大断面斜視図
3 is an enlarged cross-sectional perspective view of a shadow mask structure taken along line III-III in FIG.

【図4】シャドウマスク構体の他の例を示す拡大断面斜
視図
FIG. 4 is an enlarged sectional perspective view showing another example of the shadow mask structure.

【図5】シャドウマスク構体の別の例を示す拡大断面斜
視図
FIG. 5 is an enlarged sectional perspective view showing another example of the shadow mask structure.

【図6】シャドウマスク構体のさらに別の例を示す拡大
断面斜視図
FIG. 6 is an enlarged sectional perspective view showing still another example of the shadow mask structure.

【符号の説明】[Explanation of symbols]

5 シャドウマスク 6 マスクフレーム 7 シャドウマスク構体 8 部材 5 Shadow mask 6 Mask frame 7 Shadow mask structure 8 Member

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 断面ほぼL字状のマスクフレームと、多
数の孔が配設され、かつ張力を与えられた状態で前記マ
スクフレームに架張されたシャドウマスクとからなるシ
ャドウマスク構体を備え、前記マスクフレームの内側に
前記マスクフレームの熱膨張係数より小さい熱膨張係数
を有する板状の部材が設けられており、前記部材の両端
部は前記マスクフレームの側面および背面に固着されて
いることを特徴とするカラー陰極線管。
1. A shadow mask structure comprising: a mask frame having a substantially L-shaped cross section; and a shadow mask provided with a large number of holes and stretched on the mask frame in a tensioned state. A plate-shaped member having a coefficient of thermal expansion smaller than that of the mask frame is provided inside the mask frame, and both ends of the member are fixed to a side surface and a back surface of the mask frame. Characteristic color cathode ray tube.
【請求項2】 断面ほぼL字状のマスクフレームと、多
数の孔が配設され、かつ張力を与えられた状態で前記マ
スクフレームに架張されたシャドウマスクとからなるシ
ャドウマスク構体を備え、前記マスクフレームの内側に
前記マスクフレームの熱膨張係数より小さい熱膨張係数
を有する三角柱状の部材が設けられており、前記部材の
相隣る両面部は前記マスクフレームの側面および背面に
固着されていることを特徴とするカラー陰極線管。
2. A shadow mask structure comprising: a mask frame having a substantially L-shaped cross section; and a shadow mask provided with a large number of holes and stretched on the mask frame under tension. A triangular prism-shaped member having a coefficient of thermal expansion smaller than that of the mask frame is provided inside the mask frame, and adjacent both surface portions of the member are fixed to a side surface and a back surface of the mask frame. A color cathode ray tube characterized in that
JP8668394A 1994-04-25 1994-04-25 Color cathode-ray tube Pending JPH07296738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8668394A JPH07296738A (en) 1994-04-25 1994-04-25 Color cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8668394A JPH07296738A (en) 1994-04-25 1994-04-25 Color cathode-ray tube

Publications (1)

Publication Number Publication Date
JPH07296738A true JPH07296738A (en) 1995-11-10

Family

ID=13893813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8668394A Pending JPH07296738A (en) 1994-04-25 1994-04-25 Color cathode-ray tube

Country Status (1)

Country Link
JP (1) JPH07296738A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6577051B2 (en) 2000-04-10 2003-06-10 Samsung Sdi Co., Ltd. Flat cathode ray tube
DE19647346B4 (en) * 1995-11-15 2005-07-21 Thomson Consumer Electronics, Inc., Indianapolis Color picture tube with mask under tension and yielding support frame unit
KR100790618B1 (en) * 1999-02-19 2007-12-31 임피 위진느 프레씨지옹 Shadow mask support frame for a cathode-ray display tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19647346B4 (en) * 1995-11-15 2005-07-21 Thomson Consumer Electronics, Inc., Indianapolis Color picture tube with mask under tension and yielding support frame unit
KR100790618B1 (en) * 1999-02-19 2007-12-31 임피 위진느 프레씨지옹 Shadow mask support frame for a cathode-ray display tube
US6577051B2 (en) 2000-04-10 2003-06-10 Samsung Sdi Co., Ltd. Flat cathode ray tube

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