JP3154132B2 - Cathode ray tube - Google Patents
Cathode ray tubeInfo
- Publication number
- JP3154132B2 JP3154132B2 JP32460291A JP32460291A JP3154132B2 JP 3154132 B2 JP3154132 B2 JP 3154132B2 JP 32460291 A JP32460291 A JP 32460291A JP 32460291 A JP32460291 A JP 32460291A JP 3154132 B2 JP3154132 B2 JP 3154132B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- cathode ray
- screen
- ray tube
- electron beam
- 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
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、パネル内面に蛍光面を
有する陰極線管、特に蛍光面に使用される蛍光体に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube having a phosphor screen on the inner surface of a panel, and more particularly to a phosphor used for the phosphor screen.
【０００２】[0002]
【従来の技術】従来、陰極線管においては、図４に示す
ように、パネル１の内面に平均粒径ｄ 1 が４〜１０μｍ
あるいはそれ以上へ蛍光体２を用いて蛍光面３が形成さ
れている。一方、電子銃に印加される加速電圧は最大の
投写管に於ても３５ｋＶ程度である。2. Description of the Related Art A conventional cathode ray tube is shown in FIG.
As shown in FIG. 1Is 4 to 10 μm
Alternatively, a phosphor screen 3 is formed using phosphor 2
Have been. On the other hand, the acceleration voltage applied to the electron gun
It is also about 35 kV in the projection tube.
【０００３】電子銃から照射される電子線の物質への侵
入距離Ｘは数１で表される。The penetration distance X of an electron beam emitted from an electron gun into a substance is expressed by the following equation (1).
【０００４】[0004]
【数１】 Ｘ＝２.５×１０-12ρ-1・Ｅｏ2ｃｍ 但し、 Ｘ：平均侵入距離 ρ：物質の密度 Ｅｏ：加速度電圧X = 2.5 × 10 −12 ρ −1 · Eo 2 cm, where X: average penetration distance ρ: density of material Eo: acceleration voltage
【０００５】カラー陰極線管に使用されている蛍光体、
例えばＺｎＳ系蛍光体の密度は約４．１である。従っ
て、電子銃に印加される加速電圧３０〜３５ｋＶでは電
子線４の蛍光体即ち蛍光面３への侵入距離Ｘ1 が５〜
７．５μｍ程度となる。[0005] Phosphors used in color cathode ray tubes,
For example, the density of the ZnS-based phosphor is about 4.1. Therefore, penetration distance X 1 is 5 to phosphor i.e. fluorescent surface 3 of the acceleration voltage electron beam 4 in 30~35kV applied to the electron gun
It is about 7.5 μm.
【０００６】一般に蛍光体２の充填密度をほぼ満足させ
て最大輝度を得るための蛍光面３の膜厚Ｄ1 は蛍光体粒
子２〜３層（図示の例は３層）からなる蛍光膜が最適と
されている。In general, the thickness D 1 of the phosphor screen 3 for almost satisfying the packing density of the phosphor 2 and obtaining the maximum brightness is determined by a phosphor film composed of two to three phosphor particles (three layers in the illustrated example). It is optimal.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上述した平
均粒径４〜１０μｍの蛍光体２を用いて、蛍光体粒子２
〜３層の蛍光面３を形成した場合、膜厚Ｄ1 は８〜３０
μｍとなり、電子線４の侵入距離Ｘ1 ＝５〜７．５μｍ
よりも大きくなる。By the way, using the above-mentioned phosphor 2 having an average particle diameter of 4 to 10 μm, the phosphor particles 2
When forming the phosphor screen 3 to 3 layers, the thickness D 1 is 8 to 30
μm, and the penetration distance of the electron beam 4 X 1 = 5 to 7.5 μm
Larger than.
【０００８】図４に示すと、電子線４で発光する蛍光体
２は斜線で示す例えば最上層の蛍光体２だけとなる。従
って、電子線４を照射して蛍光面３を発光させたとき、
発光した蛍光体２の光５は、蛍光体２の非発光層を通過
してパネル１の前面に出射されることになり、光の吸
収、散乱が生じ、輝度、解像度の点で不利になる。In FIG. 4, the phosphor 2 that emits light by the electron beam 4 is, for example, only the uppermost phosphor 2 shown by oblique lines. Therefore, when the phosphor screen 3 emits light by irradiating the electron beam 4,
The emitted light 5 of the phosphor 2 passes through the non-light-emitting layer of the phosphor 2 and is emitted to the front surface of the panel 1, causing absorption and scattering of light, which is disadvantageous in terms of luminance and resolution. .
【０００９】本発明は、上述の点に鑑み、発光した蛍光
体の吸収、散乱による輝度低下、解像度低下を防止した
陰極線管を提供するものである。The present invention has been made in view of the above circumstances, and provides a cathode ray tube in which a decrease in luminance and a decrease in resolution due to absorption and scattering of a light-emitting phosphor are prevented.
【００１０】[0010]
【課題を解決するための手段】本発明は、パネル内面に
蛍光面を有する陰極線管において、蛍光体粒子１２が２
〜３層とされた蛍光面１１を有し、蛍光面１１の膜厚
が、電子銃からの電子線４の蛍光面１１への侵入距離Ｘ
1 と同等に設定されて成る。 According to the present invention, there is provided a cathode ray tube having a phosphor screen on an inner surface of a panel, wherein the phosphor particles 12 are two or more.
A fluorescent screen 11 having three layers, and a film thickness of the fluorescent screen 11
Is the penetration distance X of the electron beam 4 from the electron gun into the phosphor screen 11.
It is set equal to 1 .
【００１１】[0011]
【作用】本発明においては、蛍光面１１の膜厚Ｄ 2 を電
子線４の蛍光面１１への侵入距離と同等に設定すること
により、電子銃４を照射したとき、蛍光体の非発光層が
なくなり、又は非常に少なくなり、発光した蛍光体の光
５の吸収、散乱が最小となり、輝度、解像度の点で有利
となる。 According to the present invention, conductive film thickness D 2 of the phosphor screen 11
Set to the same distance as the penetrating wire 4 enters the phosphor screen 11
When the electron gun 4 is irradiated, the non-light-emitting layer of the phosphor is
Lost or very low light emitted by the phosphor
5 minimizes absorption and scattering, and is advantageous in terms of brightness and resolution
Becomes
【００１２】[0012]
【００１３】[0013]
【実施例】以下、図１〜図３を参照して本発明による陰
極線管の実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cathode ray tube according to the present invention will be described below with reference to FIGS.
【００１４】図１において、１は陰極線管のパネル、１
１はパネル１の内面に形成された蛍光面を示す。蛍光面
１１は、その膜厚Ｄ 2 を電子銃から出射される電子線４
の蛍光面１１への侵入距離Ｘ 1 と同等に設定する。これ
が為に本例の蛍光面１１は、電子銃からの電子線４の蛍
光体即ち蛍光面への侵入距離Ｘ1 の１／３〜２／３の大
きさの平均粒径をもつ蛍光体１２を用いて蛍光体粒子２
〜３層（本例では３層）とした最適膜厚Ｄ2 で形成され
る。In FIG. 1, reference numeral 1 denotes a cathode ray tube panel;
Reference numeral 1 denotes a fluorescent screen formed on the inner surface of the panel 1. Phosphor screen
Reference numeral 11 denotes an electron beam 4 emitted from the electron gun with the film thickness D 2.
Equally set the penetration distance X 1 to the phosphor screen 11. this
Phosphor screen 11 of the present example but since the phosphor 12 having an average particle diameter of the phosphor or magnitude of 1 / 3-2 / 3 of the penetration distance X 1 to the phosphor screen of the electron beam 4 from the electron gun Phosphor particles 2 using
(In this example three layers) to 3 layers is formed by the the optimum thickness D 2.
【００１５】図示の例では単色蛍光体層による蛍光面に
適用したが、その他、赤、緑、青の３色の蛍光体層にも
同様に電子線４の侵入距離Ｘ1 の１／３〜２／３の平均
粒径ｄ2 をもつ蛍光体１２を用いてカラー蛍光面を形成
するようになす。[0015] While in the illustrated example is applied to a fluorescent screen by a single color phosphor layer, other, red, green, 1/3 of the penetration distance X 1 of the electron beam 4 as well to the phosphor layers of three colors of blue A color phosphor screen is formed using the phosphor 12 having an average particle diameter d 2 of ２ .
【００１６】図１の構成によれば、蛍光面１１の膜厚Ｄ
2 を電子線４の蛍光面１１への侵入距離Ｘ 1 と同等に設
定することにより、電子線照射時の非発光層が可及的に
少なくなる。 即ち、電子線４の蛍光面への侵入距離Ｘ1
の１／３〜２／３の大きさの平均粒径をもつ蛍光体１２
を用いて蛍光面１１を形成することにより、蛍光体１２
の充填密度をほぼ満足させて最大輝度を得るための最適
膜厚、即ち蛍光体粒子２〜３層からなる蛍光面１１の膜
厚Ｄ2 が電子線４の侵入距離Ｘ1 と同等、従って電子線
照射時の発光層の厚さと同等となる。従って、蛍光面１
１において非発光層がなくなり、又は非常に少なくな
り、従来のような発光した蛍光体１２の光５の非発光層
による吸収、散乱が最小となり、輝度低下、解像度低下
を防止することができる。[0016] According to the configuration of FIG. 1, the thickness D of the phosphor screen 11
Set 2 equivalent to the penetration distance X 1 to the fluorescent surface 11 of the electron beam 4
The non-light-emitting layer during electron beam irradiation as much as possible
Less. That is, the penetration distance X 1 of the electron beam 4 into the phosphor screen.
Phosphor 12 having an average particle size of 1/3 to 2/3 of
The phosphor 12 is formed by using
Optimal for approximately satisfy the packing density of the obtained maximum brightness
Thickness, i.e. the thickness D 2 of the phosphor screen 11 consisting of phosphor particles 2-3 layers equal to the penetration distance X 1 of the electron beam 4, therefore equal to the thickness of the light-emitting layer of electron beam irradiation. Therefore, the fluorescent screen 1
In No. 1, the non-light-emitting layer is eliminated or extremely reduced, and the absorption and scattering of the light 5 of the phosphor 12 emitted by the non-light-emitting layer as in the related art are minimized, and a decrease in luminance and a decrease in resolution can be prevented.
【００１７】図２のグラフＩは平均粒径２〜１０μｍの
蛍光体を用いて最大輝度となる膜厚所謂最適膜厚の蛍光
面を有する２０インチ型陰極線管（加速電圧Ｈｖが３０
ｋＶ、カソード電流ＩK が２００μＡ）を作製し、その
蛍光体の平均粒径と輝度の関係を測定した特性図であ
る。Graph I of FIG. 2 shows a 20-inch cathode ray tube (acceleration voltage Hv of 30) having a phosphor screen having a so-called optimum film thickness with the maximum brightness using a phosphor having an average particle size of 2 to 10 μm.
FIG. 4 is a characteristic diagram in which the relationship between the average particle size of the phosphor and the luminance was measured when kV and the cathode current I K were 200 μA).
【００１８】図２から、平均粒径が２〜３μｍの蛍光体
を用いた蛍光面が最大の輝度を示すことが判る。FIG. 2 shows that a phosphor screen using a phosphor having an average particle diameter of 2 to 3 μm shows the maximum luminance.
【００１９】図３のグラフII は、蛍光体の平均粒径を
変化させ、最適膜厚の蛍光面を有する２０インチ型陰極
線管での加速電圧Ｈｖ３０ｋＶ、カソード電流ＩK ２０
０μＡでの走査線の幅（最大輝度の５％の輝度を示す
幅）を示す特性図である。The graph II in FIG. 3 shows an acceleration voltage Hv of 30 kV and a cathode current I K 20 of a 20-inch type cathode ray tube having a phosphor screen with an optimum thickness by changing the average particle diameter of the phosphor.
FIG. 9 is a characteristic diagram illustrating a width of a scanning line at 0 μA (a width indicating 5% of the maximum luminance).
【００２０】図３から、蛍光体の粒径が小さいほど、即
ち蛍光面の膜厚が小さいほど発光した蛍光体の光の散乱
による走査線幅の広がりが小さいことが判る。そして、
走査線幅が小さいことが解像度の向上につながる。From FIG. 3, it can be seen that the smaller the particle size of the phosphor, that is, the smaller the thickness of the phosphor screen, the smaller the spread of the scanning line width due to the scattering of the emitted phosphor. And
A small scanning line width leads to an improvement in resolution.
【００２１】[0021]
【発明の効果】本発明によれば、蛍光面の膜厚が電子線
の侵入距離と同等、即ち発光層と同等の厚みとなるの
で、非発光層が可及的に少なくなり、発光の吸収、散乱
による輝度低下、解像度低下が回避され、相対的に輝
度、解像度を向上することができる。According to the present invention, the thickness of the phosphor screen is equal to the penetration distance of the electron beam, that is, the thickness is equal to that of the light-emitting layer. In addition, a decrease in luminance and a decrease in resolution due to scattering can be avoided, and the luminance and the resolution can be relatively improved.
【００２２】従って、本発明は、例えば高品位カラー陰
極線管、高精度管等に適用して好適ならしめる。Therefore, the present invention can be suitably applied to, for example, a high-quality color cathode ray tube, a high-precision tube, and the like.
【図１】本発明に係る陰極線管の蛍光面の例を示す断面
図である。FIG. 1 is a sectional view showing an example of a fluorescent screen of a cathode ray tube according to the present invention.
【図２】本発明の説明に供する蛍光体の粒径と相対輝度
の関係を示す特性図である。FIG. 2 is a characteristic diagram showing a relationship between a particle size and a relative luminance of a phosphor used for describing the present invention.
【図３】本発明の説明に供する蛍光体の粒径と走査線幅
の関係を示す特性図である。FIG. 3 is a characteristic diagram showing a relationship between a particle size of a phosphor and a scanning line width for explanation of the present invention.
【図４】従来の陰極線管の蛍光面の例を示す断面図であ
る。FIG. 4 is a sectional view showing an example of a phosphor screen of a conventional cathode ray tube.
１ 陰極線管のパネル ２，１２ 蛍光体 ３，１１ 蛍光面 ４ 電子線 ５ 蛍光体の光 Ｘ1 電子線の蛍光面への侵入距離 ｄ1 ，ｄ2 蛍光体の粒径 Ｄ1 ，Ｄ2 蛍光面の膜厚REFERENCE SIGNS LIST 1 cathode ray tube panel 2, 12 phosphor 3, 11 phosphor screen 4 electron beam 5 light of phosphor X 1 penetration distance of electron beam to phosphor screen d 1 , d 2 particle size of phosphor D 1 , D 2 fluorescence Surface thickness
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−76235（ＪＰ，Ａ) 特開 昭58−220338（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01J 29/18 H01J 29/32 ────────────────────────────────────────────────── (5) References JP-A-63-76235 (JP, A) JP-A-58-220338 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01J 29/18 H01J 29/32
Claims (1)
有し、 前記蛍光面の膜厚が、電子線の蛍光面への侵入距離と同
等に設定されて成ることを特徴とする陰極線管。1. A phosphor screen having two or three layers of phosphor particles, wherein the thickness of the phosphor screen is set to be equal to the penetration distance of an electron beam into the phosphor screen. CRT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32460291A JP3154132B2 (en) | 1991-12-09 | 1991-12-09 | Cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32460291A JP3154132B2 (en) | 1991-12-09 | 1991-12-09 | Cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05159717A JPH05159717A (en) | 1993-06-25 |
| JP3154132B2 true JP3154132B2 (en) | 2001-04-09 |
Family
ID=18167656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32460291A Expired - Fee Related JP3154132B2 (en) | 1991-12-09 | 1991-12-09 | Cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3154132B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050041708A (en) | 2003-10-31 | 2005-05-04 | 삼성에스디아이 주식회사 | Flat panel display device |
-
1991
- 1991-12-09 JP JP32460291A patent/JP3154132B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05159717A (en) | 1993-06-25 |
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