JPH02306526A - Projection type tv cathode-ray tube - Google Patents
Projection type tv cathode-ray tubeInfo
- Publication number
- JPH02306526A JPH02306526A JP12749489A JP12749489A JPH02306526A JP H02306526 A JPH02306526 A JP H02306526A JP 12749489 A JP12749489 A JP 12749489A JP 12749489 A JP12749489 A JP 12749489A JP H02306526 A JPH02306526 A JP H02306526A
- Authority
- JP
- Japan
- Prior art keywords
- layers
- layer
- interference filter
- lambda
- filter film
- 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
- 239000010408 film Substances 0.000 claims abstract description 31
- 239000012788 optical film Substances 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000002834 transmittance Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000103 photoluminescence spectrum Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、フェースプレート内面と螢光体スクリーンと
の間に多層干渉フィルター膜を備えた投写形テレビジョ
ン用陰極線管に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cathode ray tube for projection television that is provided with a multilayer interference filter film between the inner surface of a face plate and a phosphor screen.
［従来の技術］
従来より投写形テレビジョン用陰極線管のフェースプレ
ート内面と螢光体スクリーンとの間に、輝度、コン１〜
ラスト及び色純度を向上させるために多層干渉フィルタ
ー膜を設けることが提案されている。[Prior Art] Conventionally, there has been a connection between the inner surface of the face plate and the phosphor screen of a cathode ray tube for projection television.
It has been proposed to provide a multilayer interference filter membrane to improve luster and color purity.
多層干渉フィルター膜は、低屈折率物質と高屈折率物質
を交互に層状（少なくとも７層）に堆積してなるもので
、主に低屈折率物質としては、５ｉ０２（屈折率ｎ＝１
．４７）やＭｇＦ２ （ｎｌ、３ｇ） 、高屈折率物質
としては、ＴｉＯ□（ｎ□２．２５） 、Ｔａ２０３（
ｎ□２．００）が用いられ、通常各層はλ／４ｎの光学
膜厚を有する。A multilayer interference filter film is made by depositing a low refractive index material and a high refractive index material in alternating layers (at least 7 layers).The low refractive index material is mainly 5i02 (refractive index n=1
．． 47), MgF2 (nl, 3g), and high refractive index materials such as TiO□ (n□2.25) and Ta203 (
n□2.00), and each layer typically has an optical thickness of λ/4n.
［発明が解決しようとする問題点］
しかしながら各層がλ／４ｎの光学膜厚からなる多層干
渉フィルター膜は、輝度、コン１〜ラストを向上すると
いう点では優れた効果を有し、また可視域の長波長側を
カットして透過率を低くする効果を有するが、一方短波
長側をカットする効果が少ないため色純度を向上させる
効果が不充分であるという問題がある。[Problems to be Solved by the Invention] However, a multilayer interference filter film in which each layer has an optical thickness of λ/4n has an excellent effect in improving brightness and contrast, and also has an excellent effect in improving brightness and contrast in the visible range. Although it has the effect of cutting the long wavelength side and lowering the transmittance, there is a problem that the effect of improving color purity is insufficient because the effect of cutting the short wavelength side is small.
本発明は上記事情に鑑みなされたもので、可視域の長波
長側のみならず、短波長側も力・ソトする多層干渉フィ
ルター膜を用いることによって色純度が向上し、色再現
範囲が大１１１に拡大され、また輝度、コントラストも
良好な投写形テレビジョン用陰極線管を提供することを
目的とするものである。The present invention was made in view of the above circumstances, and by using a multilayer interference filter film that suppresses not only the long wavelength side of the visible range but also the short wavelength side, color purity is improved and the color reproduction range is wide 111. The object of the present invention is to provide a cathode ray tube for projection television that has a high brightness and good contrast.
［問題点を解決するための手段］
本発明の投写形テレビジョン用陰極線管は、フェースプ
レート内面と螢光体スクリーンの間に多層干渉フィルタ
ー膜を備え、該多層干渉フィルター膜が少なくとも７層
以、上の低屈折率物質と高屈折率物質からなる交互の層
で構成されてなる投写形テレビジョン用陰極線管におい
て、該多層干渉フィルター膜の中間層の少なくとも一層
がλ／２ｎの光学膜厚を有し、他の層がλ／４ｎの光学
膜厚を有してなることを特徴とする。[Means for Solving the Problems] The cathode ray tube for projection television of the present invention includes a multilayer interference filter film between the inner surface of the face plate and the phosphor screen, and the multilayer interference filter film has at least seven layers. , wherein at least one of the intermediate layers of the multilayer interference filter film has an optical film thickness of λ/2n. The other layer has an optical thickness of λ/4n.
本発明は、λ、、／２ｎの光学膜厚を有する層を備えた
多層干渉フィルター膜を用いることによって可視域の長
波長のみならず短波長側もカットする投写形テレビジョ
ン用陰極線管を得るというものであるが、そのためには
λ／２ｎの層を中間層として用いる必要がある。すなわ
ちλ／２ｎの層を多層干渉フィルター膜の端部の層とし
てのみ用いた場合、逆に可視域の長波長側をカットし難
くなるためである。The present invention provides a cathode ray tube for projection television that cuts not only long wavelengths in the visible region but also short wavelengths by using a multilayer interference filter film equipped with layers having an optical thickness of λ, , /2n. However, for this purpose, it is necessary to use a layer of λ/2n as an intermediate layer. That is, if the λ/2n layer is used only as an end layer of a multilayer interference filter film, it becomes difficult to cut out the long wavelength side of the visible region.
尚、λは蛍光体発光スペク１〜ルの中心波長に対応し、
またｎは膜物質の屈折率を示すものである。In addition, λ corresponds to the center wavelength of the phosphor emission spectrum 1 to 1,
Further, n indicates the refractive index of the film material.
［作用］
本発明における投写形テレビジョン用陰極線管は、その
中間層の少なくとも一層がλ、、／２ｎの光学膜厚を有
し、他の層がλ７／４ｎの光学膜厚を有する多層干渉フ
ィルター膜を備えてなるため可視域の短波長側と共に長
波長側もカットでき、色純度を向上させることが可能で
ある。[Function] The cathode ray tube for projection television according to the present invention is a multilayer interference layer in which at least one of the intermediate layers has an optical thickness of λ, , /2n, and the other layers have an optical thickness of λ7/4n. Since it is equipped with a filter film, it is possible to cut both the short wavelength side and the long wavelength side of the visible range, and it is possible to improve color purity.
［実施例］ 以下本発明を実施例及び比較例に基づいて説明する。[Example] The present invention will be explained below based on Examples and Comparative Examples.
第１図は本発明の多層干渉フィルター膜、フェースプレ
ート及び螢光体スクリーンの一部を示す断面図である。FIG. 1 is a sectional view showing a part of a multilayer interference filter film, a face plate, and a phosphor screen of the present invention.
低屈折率の５ｉ０２層１０と高屈折率のＴａ２０５層１
１を交互に１３層堆積してなる多層干渉フィルター膜１
２がフェースプレート１３の内面に設けられ、さらにそ
の上に螢光体スクリーン１４が塗布され、多層干渉フィ
ルター膜１２の７層目の高屈折率のＴａ２０５層がλ／
２ｎの光学膜厚を有し、それ以外の層はλ／４ｎの光学
膜厚を有している。Low refractive index 5i02 layer 10 and high refractive index Ta205 layer 1
Multilayer interference filter film 1 formed by alternately depositing 13 layers of
2 is provided on the inner surface of the face plate 13, a phosphor screen 14 is further applied thereon, and the seventh high refractive index Ta205 layer of the multilayer interference filter film 12 has a λ/
It has an optical thickness of 2n, and the other layers have an optical thickness of λ/4n.
実施例１
第２図は、先記した本発明の多層干渉フィルター膜の透
過率曲線Ａ及び従来より知られている５ｉ０２層と Ｔ
ａ２０５層を交互に体積し、各層ともλ７′４ｎの光学
膜厚を有する多層干渉フィルター膜の透過率曲線Ｂと中
心波長が５５０ｎｍのグリーン用量光体発光スペク１〜
ルＣを示ずグラフである。Example 1 Figure 2 shows the transmittance curve A of the multilayer interference filter film of the present invention described above and the conventionally known 5i02 layer and T.
Transmittance curve B of a multilayer interference filter film in which a205 layers are stacked alternately and each layer has an optical thickness of λ7'4n and a green dose photoluminescence spectrum 1~ with a center wavelength of 550 nm.
This is a graph that does not show Le C.
第２図かられかるようにグリーン用蛍光体スペクトルは
純度の高い緑光（λ’＝ ５５０ｎｍ ）の他に青緑光
（λ磐５００ｎｍ ）及び赤色光（λζ６００ｎｍ ）
の不純成分が含まれるが、本発明の多層干渉フィルター
膜の場合、長波長（赤色光）と短波長（青緑色光）の不
純成分を力・ソ１へし、純度の高い緑光だけを有効に取
り出すことが出来るため色純度を向上させることが可能
であることがわかる。一方、従来の多層干渉フィルター
膜の場合、長波長の不純成分は力・ソトできるが、短波
長の不純成分はカット出来ず、色純度を向上させる効果
が不十分であることがわかる。As can be seen from Figure 2, the green phosphor spectrum includes high purity green light (λ' = 550 nm), blue-green light (λ 500 nm) and red light (λζ 600 nm).
However, in the case of the multilayer interference filter film of the present invention, impurity components with long wavelengths (red light) and short wavelengths (blue-green light) are reduced to 1, and only the highly pure green light is effective. It can be seen that it is possible to improve color purity because it can be taken out. On the other hand, in the case of conventional multilayer interference filter films, impurity components with long wavelengths can be filtered out, but impurity components with short wavelengths cannot be cut, indicating that the effect of improving color purity is insufficient.
［発明の効果］
以上のように本発明の投写形テレビジョン用陰極線管は
、中間層の少なくとも一層がλ／２ｎの光学膜厚を有し
、他の層がλ７／４ｎの光学膜厚を有する多層干渉フィ
ルター膜を備えてなるため、色純度を十分向上させるこ
とが可能であり、また良好な輝度、コントラストを得る
ことが可能である。[Effects of the Invention] As described above, in the projection television cathode ray tube of the present invention, at least one of the intermediate layers has an optical thickness of λ/2n, and the other layers have an optical thickness of λ7/4n. Since the multilayer interference filter film is provided with a multilayer interference filter film, it is possible to sufficiently improve color purity, and it is also possible to obtain good brightness and contrast.
第１図は本発明の投写形テレビジョン用陰極線管の多層
干渉フィルター膜、フェースプレート及び螢光体スクリ
ーンの一部を示す断面図、第２図は本発明の多層干渉フ
ィルター膜及び従来の多層干渉フィルター膜の透過率曲
線と中心波長が５５０ｎｌｌｌのグリーン用蛍光体発光
スペクＩ・ルを示ずクランである。
１０・・・５ｉ０２層
１１−− Ｔａ２０５層
１２・・・多層干渉フィルター膜
１３・・・フェースプレート
１４・・・螢光体スクリーン
特許出願人 日本電気硝子株式会社
代表者 岸 １）清 作FIG. 1 is a sectional view showing a part of the multilayer interference filter film, face plate, and phosphor screen of a cathode ray tube for projection television according to the present invention, and FIG. 2 is a cross-sectional view showing the multilayer interference filter film of the present invention and a conventional multilayer interference filter film. The transmittance curve of the interference filter film and the emission spectrum of the green phosphor with a center wavelength of 550 nll are not shown. 10...5i02 layer 11-- Ta205 layer 12... Multilayer interference filter film 13... Face plate 14... Fluorescent screen Patent applicant Nippon Electric Glass Co., Ltd. Representative Kishi 1) Kiyosaku
Claims (1)
干渉フィルター膜を備え、該多層干渉フィルター膜が少
なくとも７層以上の低屈折率物質と高屈折率物質からな
る交互の層で構成されてなる投写形テレビジョン用陰極
線管において、該多層干渉フィルター膜の中間層の少な
くとも一層がλ／２ｎの光学膜厚を有し、他の層がλ／
４ｎの光学膜厚を有してなることを特徴とする投写形テ
レビジョン用陰極線管。A projection device comprising a multilayer interference filter film between the inner surface of the face plate and the phosphor screen, and the multilayer interference filter film is composed of at least seven or more alternating layers of low refractive index material and high refractive index material. In a cathode ray tube for television, at least one intermediate layer of the multilayer interference filter film has an optical thickness of λ/2n, and the other layers have an optical thickness of λ/2n.
A cathode ray tube for projection television, characterized in that it has an optical film thickness of 4n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127494A JPH0734354B2 (en) | 1989-05-19 | 1989-05-19 | Cathode ray tube for projection television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1127494A JPH0734354B2 (en) | 1989-05-19 | 1989-05-19 | Cathode ray tube for projection television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02306526A true JPH02306526A (en) | 1990-12-19 |
| JPH0734354B2 JPH0734354B2 (en) | 1995-04-12 |
Family
ID=14961355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1127494A Expired - Lifetime JPH0734354B2 (en) | 1989-05-19 | 1989-05-19 | Cathode ray tube for projection television |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734354B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139349A (en) * | 1984-07-20 | 1986-02-25 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Display tube and projecting television device |
-
1989
- 1989-05-19 JP JP1127494A patent/JPH0734354B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139349A (en) * | 1984-07-20 | 1986-02-25 | エヌ・ベー・フイリツプス・フルーイランペンフアブリケン | Display tube and projecting television device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734354B2 (en) | 1995-04-12 |
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