JPH0240840A - Shadow mask for color picture tube - Google Patents
Shadow mask for color picture tubeInfo
- Publication number
- JPH0240840A JPH0240840A JP19130088A JP19130088A JPH0240840A JP H0240840 A JPH0240840 A JP H0240840A JP 19130088 A JP19130088 A JP 19130088A JP 19130088 A JP19130088 A JP 19130088A JP H0240840 A JPH0240840 A JP H0240840A
- Authority
- JP
- Japan
- Prior art keywords
- slot
- hole
- electron gun
- port
- shadow mask
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 238000010894 electron beam technology Methods 0.000 claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 24
- 238000005530 etching Methods 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、カラー受像管に使用されるシャドウマスク
に関し、特にスロット状（矩形状）透孔を金属薄板に多
数穿設して形成されるシャドウマスクの、前記透孔の短
辺部の形状の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a shadow mask used in a color picture tube, and in particular is formed by punching a large number of slot-shaped (rectangular) through holes in a thin metal plate. The present invention relates to improving the shape of the short side of the through hole of a shadow mask.
シャドウマスク型カラー受像管は、電子ビームを放射す
る電子銃と、この電子銃から放射される電子ビームを受
けて３原色の各色に発光する螢光体と、この螢光体と前
記電子銃との間に介設され、電子ビームを通過させる透
孔が多数形成されたシャドウマスクとを備えて構成され
ている。A shadow mask type color picture tube includes an electron gun that emits an electron beam, a phosphor that receives the electron beam emitted from the electron gun and emits light in each of three primary colors, and a phosphor and the electron gun. A shadow mask is provided between the electron beam and the shadow mask, which has a large number of through holes through which the electron beam passes.
このカラー受像管に使用されるシャドウマスクとしては
、電子ビームが通過する透孔をスロット状に形成したも
のが一般的である。このスロット状透孔が多数穿設され
たシャドウマスクを製作するには、通常、フォトエツチ
ング法が用いられる１例えば、純鉄軟鋼板やアンバー鋼
板等の金属薄板の表裏両面にフォトレジスト層を被着形
成し、その両面に焼付はパターンを介して露光し、現像
、乾燥及びバーニングの各工程を経て、金属薄板の表裏
両面に所定のパターンを有するレジスト膜を形成した後
、その両面からエツチングし、金属薄板の露出部分を食
刻して、金属薄板に多数のスロット状透孔を形成する。The shadow mask used in this color picture tube generally has a slot-shaped through hole through which the electron beam passes. To produce a shadow mask with many slot-like holes, a photo-etching method is usually used. After forming a resist film with a predetermined pattern on both the front and back sides of the thin metal plate by exposing it to light through a pattern, developing, drying and burning, it is etched from both sides. , etching the exposed portion of the thin metal sheet to form a number of slot-like holes in the thin metal sheet;
ところで、前記エツチング前の金属薄板の表裏両面に被
着した各レジスト膜には、表裏で対応する個所に、一方
の面側には比較的大きい矩形の開口部（金属表面が露出
した部分）が、他面側にはそれより小さい矩形の開口部
がそれぞれ多数形成されているが、それらの各矩形状開
口部を通してエツチング液によりエツチングを行なうと
、第１Ｏ図に示すように、金属薄板１の、レジスト膜の
前記開口部に対応する部分に穿設されたスロット状透孔
２におけるビーム通過部３が、その端部に丸味を帯びた
形状となる。尚。By the way, each of the resist films deposited on both the front and back sides of the thin metal plate before etching has relatively large rectangular openings (portions where the metal surface is exposed) on one side at corresponding locations on the front and back sides. , and a large number of smaller rectangular openings are formed on the other side. When etching is performed using an etching solution through each of these rectangular openings, the thin metal plate 1 is etched as shown in FIG. 1O. The beam passing portion 3 in the slot-shaped through hole 2 bored in the portion corresponding to the opening of the resist film has a rounded end. still.
第１Ｏ図は、シャドウマスクの、一部を拡大して電子銃
側から見た図であり、図中、４は螢光体側の孔縁を示す
、ビーム通過部３の端部が丸味を帯びた形状となると、
それだけその部分における電子ビームの透過量が減り、
透過率が低下して、カラー受像管の輝度が減少すること
になる。Fig. 1O is a partially enlarged view of the shadow mask as seen from the electron gun side. When it comes to the shape,
The amount of electron beam transmitted through that part decreases accordingly.
The transmittance decreases and the brightness of the color picture tube decreases.
そこで、シャドウマスクのビーム通過部における電子ビ
ームの透過率を上げ、カラー受像管の輝度を増加させる
ために、従来、例えば実公昭５８−３４６７５号公報に
開示されているように、ビーム通過部を、矩形の両長辺
の両端を弧状に外方へ突出させた形状としたり、また特
開昭５５−１５９５４５号公報に開示されているように
、ビーム通過部の長手方向における両端部分を中央部分
より膨らませたりすることが行なわれている。第１１図
及び第１２図に、それらのシャドウマスクの一部を拡大
して電子銃側から見た図を示す、それらの図において、
１′１″が金属薄板、２’２”がスロット状透孔、３′
、３”がビーム通過部、及び破線で表わした４′、４”
が螢光体側孔縁をそれぞれ示す。Therefore, in order to increase the transmittance of the electron beam in the beam passing part of the shadow mask and increase the brightness of the color picture tube, conventionally, as disclosed in Japanese Utility Model Publication No. 58-34675, the beam passing part was , the ends of both long sides of a rectangle may be shaped to project outward in an arc shape, or, as disclosed in JP-A-55-159545, both ends in the longitudinal direction of the beam passing section may be formed into a central portion. Efforts are being made to make it more inflated. FIG. 11 and FIG. 12 show enlarged views of a portion of those shadow masks as seen from the electron gun side.
1'1'' is a thin metal plate, 2'2'' is a slot-shaped through hole, 3'
, 3" is the beam passage section, and 4' and 4" are indicated by broken lines.
indicates the edge of the phosphor side hole.
しかしながら、上記した従来のシャドウマスクにおいて
は、そのシャドウマスクを使用し、螢光スクリーン基村
上に螢光体パターンを形成してカラー受像管の螢光スク
リーンを作成した場合、第１３図に示すように、緑色、
青色及び赤色の各螢光体Ｇ、Ｂ、Ｒの隣り合うもの同士
の両端部分における間隔が狭くなる。隣り合う螢光体同
士の間隔が狭くなった部分があると、電子ビームを照射
して螢光体を発光させた際に。However, in the conventional shadow mask described above, when a fluorescent screen for a color picture tube is created by using the shadow mask and forming a phosphor pattern on the base layer of the fluorescent screen, as shown in FIG. , green,
The spacing between adjacent blue and red phosphors G, B, and R at both end portions becomes narrower. If there are parts where the distance between adjacent phosphors is narrow, when the phosphors emit light when irradiated with an electron beam.
その部分において隣接する螢光体まで発光させてしまう
ことがあり、カラー受像管の画質の低下を来たすことに
なる。一方、螢光体の中央部分が凹んでいると、その凹
んだ分だけ発色が起こらないので、輝度を高くする上で
不利になる。In that area, adjacent phosphors may also emit light, resulting in a decline in the image quality of the color picture tube. On the other hand, if the central portion of the phosphor is recessed, color development will not occur by the amount of the recess, which is disadvantageous in increasing brightness.
この発明は、上記した従来のシャドウマスクにおける問
題点を解決するためになされたものであり、ビーム通過
部のコーナ一部分の形状を出来るだけ直角に近付け、か
つビーム通過部の短辺部をその幅方向へは突出させない
形状に形成されたスロット状透孔を有するシャドウマス
クを提供することを技術的課題とする。This invention was made in order to solve the above-mentioned problems with the conventional shadow mask, and the shape of the corner part of the beam passing section is made as close to a right angle as possible, and the short side of the beam passing section is A technical problem is to provide a shadow mask having a slot-like through hole formed in a shape that does not project in the direction.
この発明は、カラー受像管用シャドウマスクのスロット
状透孔の短辺部における電子銃側孔縁を、スロット状透
孔の幅方向に膨出した形状に形成するともに、スロット
状透孔の、少なくとも短辺部における電子銃側孔縁か゛
ら内周縁にかけての孔内側面をテーパー状に形成したこ
とを要旨とする。According to the present invention, the edge of the electron gun side hole on the short side of the slot-like through-hole of a color picture tube shadow mask is formed in a shape that bulges in the width direction of the slot-like through-hole, and at least The gist is that the inner side surface of the hole from the electron gun side hole edge to the inner peripheral edge of the short side portion is tapered.
一般に、カラー受像管用シャドウマスクにおいては、金
属薄板の電子銃側孔縁に連接する孔内側面と、螢光体側
孔縁に連接する孔内側面とが、金属薄板の厚み方向にお
ける成る深さにおいて出合うことによりビーム通過部が
形成され、その電子銃側孔内側面と螢光体側孔内側面と
の交線の形状によってビーム通過部の形状が決定される
。この発明のシャドウマスクにおいては。Generally, in a shadow mask for a color picture tube, the inner surface of the hole connected to the hole edge on the electron gun side of the thin metal plate and the inner side surface of the hole connected to the hole edge on the phosphor side are located at a depth in the thickness direction of the thin metal plate. A beam passage section is formed by the meeting, and the shape of the beam passage section is determined by the shape of the line of intersection between the inner surface of the electron gun side hole and the inner surface of the phosphor side hole. In the shadow mask of this invention.
スロット状透孔の短辺部における電子銃側孔縁は、スロ
ット状透孔の幅方向に膨出した形状を有しているが、電
子銃側孔内側面が、金属薄板表面の１幅方向に膨出した
前記孔縁から、金属薄板の厚み方向における成る深さま
でテーパー状に延びて、裏面の螢光体側孔内側面と出合
うため、ビーム通過部の該当するコーナ一部の内周縁は
、スロット状透孔の幅方向へは突出しないで、かつ直角
に近い形状になる。The edge of the electron gun side hole on the short side of the slot-like through-hole has a shape that bulges in the width direction of the slot-like through-hole, but the inner surface of the electron gun side hole is in one width direction of the surface of the thin metal plate. The inner peripheral edge of the corresponding corner of the beam passage section extends in a tapered shape from the bulging edge of the hole to the depth in the thickness direction of the thin metal plate and meets the inner surface of the hole on the back side of the phosphor side. It does not protrude in the width direction of the slot-like through hole and has a shape that is close to a right angle.
以下、この発明の好適な実施例について図面を参照しな
がら説明する。Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
第１図ないし第４図はこの発明の１実施例を示し、第１
図は、カラー受像管用シャドウマスクの一部を拡大して
電子銃側から見た平面図。1 to 4 show one embodiment of the present invention, and a first embodiment of the present invention is shown in FIGS.
The figure is a partially enlarged plan view of a shadow mask for a color picture tube, viewed from the electron gun side.
第２図は、同じく螢光体側から見た平面図、第３図及び
第４図はそれぞれ、第１図及び第２図のｍ−ｍ’及びｆ
Ｖ−ＩＶ’の各切断面の拡大図である。このカラー受像
管用シャドウマスクは。Figure 2 is a plan view similarly seen from the phosphor side, Figures 3 and 4 are m-m' and f of Figures 1 and 2, respectively.
It is an enlarged view of each cross section of V-IV'. This shadow mask for color picture tubes.
純鉄軟鋼板やアンバー鋼板等からなる金属薄板１０にス
ロット状透孔１２が多数穿設されており、電子銃から放
射された電子ビームは、そのスロット状透孔１２のビー
ム通過部１４を、第１図において紙面の手前側から向う
側へ透過する。１６は電子銃側の孔縁を示し、この電子
銃側孔縁１６は、スロット状透孔１２の両短辺部の両端
がスロット状透孔１２の幅方向に膨出した形状となって
いる。A large number of slot-shaped through holes 12 are bored in a thin metal plate 10 made of a pure iron mild steel plate, an amber steel plate, etc., and the electron beam emitted from the electron gun passes through the beam passing portion 14 of the slot-shaped through holes 12. In FIG. 1, the light is transmitted from the front side of the page to the opposite side. Reference numeral 16 indicates a hole edge on the electron gun side, and the electron gun side hole edge 16 has a shape in which both ends of both short sides of the slot-like through-hole 12 bulge in the width direction of the slot-like through-hole 12. .
また、１８は螢光体側の孔縁を示している。Further, 18 indicates the hole edge on the phosphor side.
スロット状透孔１２の各短辺部においては、第３図に示
すように、電子銃側の、両端がスロット状透孔１２の幅
方向に膨出した形状の孔縁１６にテーパー状の孔内側面
２０が連接しており、一方、螢光体側の孔縁１８にはテ
ーパー状の孔内側面２２が連接していて１両孔内側面２
ｏ、２２が、金属薄板ＩＯの電子銃側表面から深さｔ、
の位置で出合い、ビーム通過部１４の内周縁２４が形成
されている。このように、スロット状透孔１２の短辺部
における電子銃側孔縁１６は、スロット状透孔１２の幅
方向に膨出した形状を有しているが、電子銃側孔内側面
２０が、金属薄板１０の表面からビーム通過部１４の内
周縁２４までテーパー状に延びて、裏面の螢光体側孔内
側面２２と出合うようになっているため、ビーム通過部
１４の各コーナ一部の内周縁２４は、スロット状透孔１
２の幅方向へは突出した形状にはならず、かつ直角に近
い形状をなす。In each of the short sides of the slot-shaped through-hole 12, as shown in FIG. The inner surface 20 is connected to the hole edge 18 on the phosphor side, and the tapered hole inner surface 22 is connected to the hole edge 18 on the phosphor side.
o, 22 is the depth t from the electron gun side surface of the thin metal plate IO,
The inner circumferential edge 24 of the beam passage section 14 is formed. As described above, the electron gun side hole edge 16 on the short side of the slot-like through-hole 12 has a shape that bulges in the width direction of the slot-like through-hole 12, but the electron gun side hole inner surface 20 , extends in a tapered shape from the surface of the thin metal plate 10 to the inner peripheral edge 24 of the beam passage section 14, and meets the inner surface 22 of the phosphor side hole on the back surface, so that a part of each corner of the beam passage section 14 The inner peripheral edge 24 has a slot-shaped through hole 1
2 does not have a protruding shape in the width direction, and has a shape that is close to a right angle.
また、スロット状透孔１２の中央部分においては、第４
図に示すように、電子銃側孔内側面２０と螢光体側のテ
ーパー状孔内側面２２とは、電子銃側表面から深さｔ
１Ｊの浅い位置で出合って、ビーム通過部１４の内周縁
２４が形成されている。In addition, in the central part of the slot-shaped through hole 12, a fourth
As shown in the figure, the electron gun side hole inner surface 20 and the phosphor side tapered hole inner surface 22 are at a depth t from the electron gun side surface.
The inner peripheral edge 24 of the beam passage section 14 is formed by meeting at a shallow position of 1J.
上記した形状のスロット状透孔を金属薄板に形成するに
は、金属薄板の表裏両面に被着した各レジスト膜の１表
裏で対応する個所に、電子銃側となる面には第５図（Ａ
）に示したような工学形の開口部２６を形成し、螢光体
側となる面には第５図（Ｂ）に示したような矩形状の開
口部２８を形成して、その表裏両面からエツチングを施
すようにする。電子銃側に形成される工学形の開口部２
６における各部の寸法比の１例を示すと。In order to form slot-like through holes of the above-mentioned shape in a thin metal plate, the resist films deposited on both the front and back sides of the thin metal plate are placed at corresponding locations on the front and back sides of the metal sheet, and on the surface facing the electron gun (see FIG. 5). A
), and a rectangular opening 28 as shown in FIG. 5(B) is formed on the surface facing the phosphor. Apply etching. Engineering-shaped opening 2 formed on the electron gun side
An example of the dimensional ratio of each part in No. 6 is shown below.
ａ：ｂ：ｃ：ｄ＝１０：４：１：１であり、また螢光体
側に形成される矩形の開口部２８における各部の寸法比
の１例を示すと、ｅ：ｆ＝８：５である。シャドウマス
クの、それ以外の製作工程は、従前と全く同様であり、
ここではその説明を省略する。ただ、エツチング工程に
おいて、金属薄板の螢光体側からのエツチングが深くな
り、電子銃側からのエツチングが浅くなり過ぎると、表
裏両面から進行するエツチングの合一部分であるビーム
通過部の内周縁形状が、シャドウマスクの電子銃側孔縁
の形状に近いものとなる。そこで、スロット状透孔の短
辺部において、金属薄板の厚み方向における電子銃側表
面からの深さｔｌと、螢光体側からの深さｔ２ との比
（第３図参照）を、ｊ２＝ｌ−ｔｌとした場合に１例え
ばｔｔ ＝０．２〜０．５が適当であり、また、スロッ
ト状透孔１２の中央部分においては、電子銃側表面から
の深さｔ１′と、螢光体側からの深さｔ、ｌとの比（第
４図参照）を、ｔ、’＝ ｉ −ｔ１’とした場合に１
例えばｔ１’＝Ｑ〜０．３が適当である。a:b:c:d=10:4:1:1, and an example of the dimensional ratio of each part in the rectangular opening 28 formed on the phosphor side is e:f=8:5. It is. The rest of the manufacturing process for the shadow mask is exactly the same as before.
The explanation thereof will be omitted here. However, in the etching process, if the etching from the phosphor side of the thin metal plate becomes too deep and the etching from the electron gun side becomes too shallow, the shape of the inner peripheral edge of the beam passage part, which is the merging part of etching progressing from both the front and back sides, will change. , the shape is close to that of the electron gun side hole edge of the shadow mask. Therefore, in the short side of the slot-shaped through hole, the ratio of the depth tl from the electron gun side surface in the thickness direction of the metal thin plate to the depth t2 from the phosphor side (see Fig. 3) is expressed as j2= l-tl, 1, for example, tt = 0.2 to 0.5 is appropriate, and in the central part of the slot-shaped through hole 12, the depth t1' from the electron gun side surface and the fluorescence If the ratio between the depths t and l from the body side (see Figure 4) is t,'= i - t1', then 1.
For example, t1'=Q~0.3 is suitable.
第６図（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）に、スロット状
透孔３２．４２．５２．６２の形状の他の例を、シャド
ウマスクを電子銃側から見た状態で示す、これらの図に
おいて、３４．４４．５４．６４がビーム通過部、３６
．４６．５６，６６が電子銃側孔縁、４０．５０゜６０
．７０が電子銃側孔内側面である。尚、１枚のシャドウ
マスクにおいて、これら種々の形状のスロット状透孔３
２．４２．５２．６２を組み合わせて形成するようにし
てもよい。これら第６図（Ａ）。Figures 6 (A), (B), (C), and (D) show other examples of the shapes of the slot-like through holes 32, 42, 52, and 62, with the shadow mask viewed from the electron gun side. In these figures, 34.44.54.64 is the beam passage section, 36
．． 46.56, 66 are electron gun side hole edges, 40.50°60
．． 70 is the inner surface of the electron gun side hole. In addition, in one shadow mask, these slot-like through holes 3 of various shapes are
2.42.52.62 may be formed in combination. These Figure 6(A).
（Ｂ）、（Ｃ）、（Ｄ）に示した形状のスロット状透孔
３２．４２．５２．６２は、シャドウマスクの製作過程
において、金属薄板の電子銃側に被着されたレジスト面
に、第７図（ａ）、（ｂ）、（ｃ）、（ｄ）に示したよ
うな形状の開口部３８．４８．５８．６８を形成し、螢
光体側には第５図（Ｂ）と同様の矩形状の開口部を形成
して、その表裏両面からエツチングを施すことにより得
られる。The slot-shaped through holes 32, 42, 52, and 62 having the shapes shown in (B), (C), and (D) are formed on the resist surface attached to the electron gun side of the thin metal plate during the manufacturing process of the shadow mask. , openings 38, 48, 58, 68 having the shapes shown in FIGS. 7(a), (b), (c), and (d) are formed, and the openings 38, 48, 58, and 68 as shown in FIG. 5(B) are formed on the phosphor side. It is obtained by forming a rectangular opening similar to the above and etching it from both the front and back sides.
また、第８図（Ａ）に示したスロット状透孔７２は、そ
の短辺部における電子銃側孔縁７６を、スロット状透孔
７２の幅方向及び長手方向に膨出させた形状に形成し、
その孔縁７６からビーム通過部７４内周縁にかけてテー
パー状の孔内側面８０が形成されている例である。この
第８図（Ａ）に示したような形状のスロット状透孔７２
は、シャドウマスクの製作過程で金属薄板の電子銃側に
被着されるレジスト面に、第８図（Ｂ）に示したような
形状の開口部７８を形成すればよい。但し、開口部７８
の形状が複雑であるため、その形状にばらつきが生じ易
いといった問題はある。Further, the slot-shaped through-hole 72 shown in FIG. 8(A) is formed so that the electron gun-side hole edge 76 on its short side is bulged in the width direction and longitudinal direction of the slot-shaped through-hole 72. death,
In this example, a tapered hole inner side surface 80 is formed from the hole edge 76 to the inner peripheral edge of the beam passing portion 74. A slot-shaped through hole 72 having a shape as shown in FIG. 8(A)
In this case, an opening 78 having a shape as shown in FIG. 8(B) may be formed on the resist surface of the thin metal plate that is applied to the electron gun side in the process of manufacturing the shadow mask. However, the opening 78
Since the shape is complicated, there is a problem that variations in the shape are likely to occur.
さらに、第９図に示したスロット状透孔８２は。Furthermore, the slot-shaped through hole 82 shown in FIG.
電子銃側孔縁８６からビーム通過部８４の内周縁８８に
かけて形成されるテーパー状孔内側面９０が、ビーム通
過部８４の全周を囲むようにした例であり、上記した各
実施例の電子銃側が斯る構成となってもよい。This is an example in which the tapered hole inner surface 90 formed from the electron gun side hole edge 86 to the inner peripheral edge 88 of the beam passage section 84 surrounds the entire circumference of the beam passage section 84, and the electron The gun side may also have such a configuration.
尚、上記した実施例においては、金属薄板のエツチング
をその両面から同時に行なう四記載したが、これに限定
するものではなく、いわゆる゛′片面塗り止めエツチン
グ″のように金属薄板の片面を耐食膜で順次被覆し、片
面ずつ順次エツチングするようにしてもよいことは勿論
である。In the above-mentioned embodiments, etching of the thin metal plate was performed simultaneously from both sides, but the etching is not limited to this, and one side of the thin metal plate is etched with a corrosion-resistant film, as in so-called ``single-sided coating etching''. Of course, it is also possible to sequentially coat the surface with the etchant and etch it sequentially one side at a time.
この発明は以上説明したように構成されかつ作用するの
で、この発明に係るシャドウマスクをカラー受像管に使
用するときは、電子銃から放射される電子ビームが通過
するビーム通過部のコーナ一部分の形状がほぼ直角に近
く、かつビーム通過部の短辺部はその幅方向へは突出し
ていないので、シャドウマスクのビーム通過部における
電子ビームの透過率を上げて、カラー受像管の輝度を増
加させることができ、かつ、電子ビームを照射して螢光
体を発光させた際に。Since the present invention is constructed and operates as described above, when the shadow mask according to the present invention is used in a color picture tube, the shape of a part of the corner of the beam passage section through which the electron beam emitted from the electron gun passes. is nearly perpendicular, and the short side of the beam passing section does not protrude in the width direction, so the transmittance of the electron beam in the beam passing section of the shadow mask can be increased to increase the brightness of the color picture tube. , and when the phosphor emits light by irradiating it with an electron beam.
隣接する螢光体まで発光させてしまうようなことが起こ
らず、カラー受像管の画質を良好に維持することができ
る。This prevents adjacent phosphors from emitting light, and the image quality of the color picture tube can be maintained at a good level.
第１図ないし第４図はこの発明の１実施例を示し、第１
図は、カラー受像管用シャドウマスクの一部を拡大して
電子銃側から見た平面図、第２図は、同じく螢光体側か
ら見た平面図、第３図及び第４図はそれぞれ、第１図及
び第２図のｍ−ｍ″及びＩＶ−ＩＶ’の各切断面の拡大
図。
第５図（Ａ）、（Ｂ）は、上記シャドウマスクの製作過
程において金属薄板の表裏両面に被着形成される各レジ
スト膜の、電子銃側となる面及び螢光体側となる面にそ
れぞれ形成される開口部の形状を示す図、第６図（Ａ）
、（Ｂ）、（Ｃ）、（Ｄ）は、それぞれスロット状透孔
の他の例を示し、シャドウマスクを電子銃側から見た一
部拡大平面図、第７図（ａ）、（ｂ）、（ｃ）、（ｄ）
は、第６図（Ａ）、（Ｂ）、（Ｃ）、（Ｄ）に示したス
ロット状透孔を形成するために、シャドウマスクの製作
過程において金属薄板の、電子銃側となるレジスト膜面
にそれぞれ形成される開口部の形状を示す図、第８図（
Ａ）、（Ｂ）は、スロット状透孔のさらに別の例を示す
一部拡大平面図、及び電子銃側となるレジスト膜面に形
成される開口部の形状を示す図、第９図は、スロット状
透孔のさらにまた別の例を示す一部拡大平面図、第１０
図、第１１図及び第１２図は、それぞれ従来のカラー受
像管用シャドウマスクの例を示す、電子銃側から見た一
部拡大平面図、第１３図は、従来のシャドウマスクを使
用した場合における。
螢光体の発光状態を説明するための図である。
ｌＯ・・・金属薄板、
１２．３２．４２．５２．６２．７２．８２・・・スロ
ット状透孔、１４．３４．４４．５４．６４．７４．８
４・・・ビーム通過部、１６．３６．４６．５６．６６
．７６．８６・・・電子銃側孔縁。
１８・・・発光体側孔縁、
２０．４０．５０．６０．７０．８０．９０・・・電子
銃側孔内側面、
′）ｎ
￥：１ｔ
第
図
２２・・・発光体側孔内側面。
２４、８８・・・ビーム通過部の内周縁。
代理人 弁理士 間 宮 武 雄
（Ａ）
・ｂ
（Ｂ）
、ｆ
第
図
第１０
図
第
図
（ａ）
（ｂ）
（、Ｃ）
（ｄ）
第１１
図
慎
図
第
図
４′ア
手続補正芯
昭和６３年８月１１日
発明の名称
カラー受像管用シャドウマスク
補正をする者
ＩＧ件との関係 特許出顕人
住 所 京都市上京区堀用通寺之内上る４丁口天神
北町Ｆ番地の１
名 称 大日本スクリーン製造株式会社代表者 代
表取締投石田徳次部1 to 4 show one embodiment of the present invention, and a first embodiment of the present invention is shown in FIGS.
The figure is an enlarged plan view of a part of the color picture tube shadow mask seen from the electron gun side, Figure 2 is a plan view similarly seen from the phosphor side, and Figures 3 and 4 are respectively. Enlarged views of the cross sections m-m'' and IV-IV' in Figs. FIG. 6(A) is a diagram showing the shapes of openings formed on the surface facing the electron gun and the surface facing the phosphor of each resist film to be deposited.
, (B), (C), and (D) respectively show other examples of slot-like through holes, and are partially enlarged plan views of the shadow mask seen from the electron gun side. ), (c), (d)
In order to form the slot-like through holes shown in FIGS. 6(A), (B), (C), and (D), a resist film on the electron gun side of the thin metal plate was formed during the shadow mask manufacturing process. A diagram showing the shapes of openings formed in each surface, FIG.
A) and (B) are partially enlarged plan views showing still another example of a slot-like through hole, and a diagram showing the shape of an opening formed in the resist film surface facing the electron gun; , a partially enlarged plan view showing yet another example of a slot-like through hole, No. 10
11 and 12 are partially enlarged plan views as seen from the electron gun side, respectively showing examples of conventional shadow masks for color picture tubes, and FIG. . FIG. 3 is a diagram for explaining a light emitting state of a phosphor. lO...Thin metal plate, 12.32.42.52.62.72.82...Slot-shaped through hole, 14.34.44.54.64.74.8
4... Beam passing section, 16.36.46.56.66
．． 76.86...Electron gun side hole edge. 18...Emitter side hole edge, 20.40.50.60.70.80.90...Electron gun side hole inner surface, ')n ¥:1t Fig. 22...Illuminant side hole inner surface. 24, 88... Inner peripheral edge of the beam passage section. Agent Patent Attorney Takeo Mamiya (A) ・b (B) , f Figure 10 Figure 10 (a) (b) (, C) (d) Figure 11 Shin Figure 4'A Procedure Amendment Core Date of invention: August 11, 1988 Name of the person who corrects shadow masks for color picture tubes Relationship to the IG matter Address of the patentee Address: F, Tenjin Kitamachi, 4-chome, Horiyo-dori Teranouchi, Kamigyo-ku, Kyoto City 1 Name Representative of Dainippon Screen Manufacturing Co., Ltd. Representative Director Tokuji Ishida
Claims (1)
過させるビーム通過部を有するスロット状透孔が多数穿
設されてなるカラー受像管用シャドウマスクにおいて、
前記スロット状透孔の、少なくとも短辺部における電子
銃側孔縁を、スロット状透孔の幅方向に膨出した形状に
形成するともに、スロット状透孔の、少なくとも短辺部
における電子銃側孔縁から内周縁にかけての孔内側面を
テーパー状に形成したことを特徴とするカラー受像管用
シャドウマスク。1. A shadow mask for a color picture tube in which a large number of slot-like through holes each having a beam passing portion through which an electron beam emitted from an electron gun passes is bored in a thin metal plate,
The electron gun side hole edge of the slot-like through-hole at least on the short side is formed in a shape that bulges in the width direction of the slot-like through-hole, and the electron gun side of the slot-like through-hole at least on the short side A shadow mask for a color picture tube, characterized in that the inside surface of the hole is tapered from the hole edge to the inner peripheral edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191300A JP2741036B2 (en) | 1988-07-30 | 1988-07-30 | Shadow mask for color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191300A JP2741036B2 (en) | 1988-07-30 | 1988-07-30 | Shadow mask for color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0240840A true JPH0240840A (en) | 1990-02-09 |
| JP2741036B2 JP2741036B2 (en) | 1998-04-15 |
Family
ID=16272269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63191300A Expired - Fee Related JP2741036B2 (en) | 1988-07-30 | 1988-07-30 | Shadow mask for color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2741036B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280215A (en) * | 1990-11-22 | 1994-01-18 | Kabushiki Kaisha Toshiba | Shadow mask for color cathode ray tube |
| KR100455677B1 (en) * | 2001-03-06 | 2004-11-06 | 마쯔시다덴기산교 가부시키가이샤 | Color picture tube |
| KR100505094B1 (en) * | 2002-05-29 | 2005-08-03 | 엘지.필립스 디스플레이 주식회사 | Structure of slot feature for shadow mask |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513732U (en) * | 1974-06-24 | 1976-01-12 | ||
| JPS5376741A (en) * | 1976-12-20 | 1978-07-07 | Toshiba Corp | Shadow mask its fabrication |
| JPS54137271A (en) * | 1978-04-17 | 1979-10-24 | Toshiba Corp | Manufacture of shadow mask |
| JPS55159545A (en) * | 1979-05-24 | 1980-12-11 | Rca Corp | Color video tube with slittlike shadow mask and method of fabricating same |
| US4518892A (en) * | 1980-05-12 | 1985-05-21 | Buckbee Mears Company | Television picture tube with aperture mask having recesses therein |
-
1988
- 1988-07-30 JP JP63191300A patent/JP2741036B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513732U (en) * | 1974-06-24 | 1976-01-12 | ||
| JPS5376741A (en) * | 1976-12-20 | 1978-07-07 | Toshiba Corp | Shadow mask its fabrication |
| JPS54137271A (en) * | 1978-04-17 | 1979-10-24 | Toshiba Corp | Manufacture of shadow mask |
| JPS55159545A (en) * | 1979-05-24 | 1980-12-11 | Rca Corp | Color video tube with slittlike shadow mask and method of fabricating same |
| US4518892A (en) * | 1980-05-12 | 1985-05-21 | Buckbee Mears Company | Television picture tube with aperture mask having recesses therein |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280215A (en) * | 1990-11-22 | 1994-01-18 | Kabushiki Kaisha Toshiba | Shadow mask for color cathode ray tube |
| US5411822A (en) * | 1990-11-22 | 1995-05-02 | Kabushiki Kaisha Toshiba | Shadow mask for color cathode ray tube, shadow mask printing negative plate used for manufacture of the shadow mask, and method and manufacturing the negative plate |
| EP0715331A2 (en) | 1990-11-22 | 1996-06-05 | Kabushiki Kaisha Toshiba | Negative plate used for manufacture of a shadow mask, and method for manufacturing the negative plate |
| EP0715331A3 (en) * | 1990-11-22 | 1997-05-28 | Toshiba Kk | Negative plate used for manufacture of a shadow mask, and method for manufacturing the negative plate |
| KR100455677B1 (en) * | 2001-03-06 | 2004-11-06 | 마쯔시다덴기산교 가부시키가이샤 | Color picture tube |
| KR100505094B1 (en) * | 2002-05-29 | 2005-08-03 | 엘지.필립스 디스플레이 주식회사 | Structure of slot feature for shadow mask |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2741036B2 (en) | 1998-04-15 |
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