JPS6354754B2 - - Google Patents
Info
- Publication number
- JPS6354754B2 JPS6354754B2 JP55168909A JP16890980A JPS6354754B2 JP S6354754 B2 JPS6354754 B2 JP S6354754B2 JP 55168909 A JP55168909 A JP 55168909A JP 16890980 A JP16890980 A JP 16890980A JP S6354754 B2 JPS6354754 B2 JP S6354754B2
- Authority
- JP
- Japan
- Prior art keywords
- sio
- cathode ray
- ray tube
- afterglow
- color saturation
- 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
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 15
- 229910004283 SiO 4 Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 229910052844 willemite Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)
Landscapes
- Luminescent Compositions (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、投写形陰極線管、とくに大画面の
テレビ受像管などに用いられる高輝度陰極線管に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a projection cathode ray tube, particularly a high-intensity cathode ray tube used in large-screen television picture tubes and the like.
［従来の技術およびその課題］
一般に、市販されている大画面のテレビ受像機
の多くは、陰極線管上の高輝度画像をレンズによ
つて拡大投写する方式を採用している。このよう
な投写形陰極線管では、高輝度を得るために、ガ
ラスバルブのフエース部内面の螢光面に加えられ
る負荷が非常に大きくなる。したがつて、この種
の投写形陰極線管に用いられる螢光体層には、電
流対輝度特性、温度消光特性および寿命特性のい
ずれにも優れていること、ならびに、一般的特性
として残光の短いことや色の飽和度が高いことな
どが要求される。[Prior Art and its Problems] In general, many commercially available large-screen television receivers employ a method of enlarging and projecting a high-brightness image on a cathode ray tube using a lens. In such a projection cathode ray tube, in order to obtain high brightness, a very large load is applied to the fluorescent surface on the inner surface of the face of the glass bulb. Therefore, the phosphor layer used in this type of projection cathode ray tube must have excellent current vs. brightness characteristics, temperature quenching characteristics, and lifetime characteristics, as well as low afterglow as a general characteristic. It is required to be short and have high color saturation.
現在、上記のような投写形陰極線管用に使われ
ている緑色螢光体は、EIA番号P43で示される
Gd2O2S：Tb（以下、P43と略記する）やP1で示
されるZn2SiO4：Mn（以下、P1と略記する）にて
代表される。ところが、P43は温度消光特性と色
の飽和度に問題があり、また、P1では残光特性
に問題があり、必ずしも十分な性能が得られてい
ない。 The green phosphor currently used in projection cathode ray tubes like the one above is designated by the EIA number P43.
It is represented by Gd 2 O 2 S:Tb (hereinafter abbreviated as P43) and Zn 2 SiO 4 :Mn (hereinafter abbreviated as P1) denoted by P1. However, P43 has problems with temperature extinction characteristics and color saturation, and P1 has problems with afterglow characteristics, so sufficient performance is not necessarily achieved.
この発明は、上記の欠点を改善するためになさ
れたもので、Y2SiO5：Tbの構造式で表わされる
緑色螢光体とP1との適当量の混合により、色の
飽和度および残光特性を解決したことを特徴とし
ている。 This invention was made to improve the above-mentioned drawbacks, and by mixing an appropriate amount of P1 with a green phosphor represented by the structural formula of Y 2 SiO 5 :Tb, color saturation and afterglow can be improved. It is characterized by its solved characteristics.
［課題を解決るための手段］
発明者は、鋭意研究の末、上記P1よりも残光
が短く、しかも、電流対輝度特性などに優れた物
質として、Y2SiO5：Tbがあることが判つた。ま
た、P1と同様、温度消光特性が優れているため、
かなりの温度上昇がある場合にも色の変化がなく
安定した色が常に得られることが判つた。[Means for Solving the Problem] After intensive research, the inventor discovered that Y 2 SiO 5 :Tb is a material that has a shorter afterglow than the above P1 and has excellent current vs. brightness characteristics. I understand. Also, like P1, it has excellent temperature quenching properties, so
It was found that even when there was a considerable temperature rise, a stable color was always obtained without any color change.
ところが、Y2SiO5：Tbの構造式で表わされる
緑色螢光体は、投写形陰極線管の螢光体層として
用いた場合には、上記の必要性能はほぼ満足でき
るものの、色の飽和度が若干劣るという課題があ
る。 However, when a green phosphor represented by the structural formula Y 2 SiO 5 :Tb is used as a phosphor layer in a projection cathode ray tube, it can almost satisfy the above required performance, but the color saturation is There is a problem that is slightly inferior.
かかる課題を見い出したことを出発点として、
発明者は、さらに引き続く研究により、上記P1
とY2SiO5：Tbとの混合物で螢光体層を形成した
ところ、残光特性の許容量はP1がほぼ50重量％
となる混合比が限度であり、これ以上の割合で
P1をY2SiO5：Tbに混合すると、たとえば、テロ
ツプが流れたときに緑色の残光が非常に気になる
ことが判つた。 With the discovery of this issue as a starting point,
Through further research, the inventor discovered that the above P1
When a phosphor layer was formed with a mixture of Y2SiO5 :Tb and
The mixing ratio is the limit, and if the ratio is higher than this,
It was found that when P1 was mixed with Y 2 SiO 5 :Tb, for example, the green afterglow was very noticeable when the caption was played.
また、前述のP43（Gd2O2S：Tb）を塗つた投
写形陰極線管の映像と、P1およびY2SiO5：Tbの
混合螢光体を塗着したこの発明の投写形陰極線管
の映像との視感的な色評価を行なつたところ、
P1の塗着量が20重量％以上であれば、P43よりも
充分に色飽和度が向上されていることが認知され
ることも判明した。 In addition, an image of a projection cathode ray tube coated with P43 (Gd 2 O 2 S: Tb) as described above and a projection cathode ray tube of the present invention coated with a mixed phosphor of P1 and Y 2 SiO 5 :Tb are shown. When we performed a visual color evaluation with the video, we found that
It was also found that when the coating amount of P1 was 20% by weight or more, it was recognized that the color saturation was sufficiently improved compared to P43.
そのうえで、このY2SiO5：Tbに上記P1を上記
範囲の混合比で混合すれば、残光特性を劣化させ
ることなく色の飽和度を改善できることを見い出
し、この発明を完成するに至つたものである。 Furthermore, they discovered that by mixing the above-mentioned P1 with this Y 2 SiO 5 :Tb at a mixing ratio within the above range, color saturation could be improved without deteriorating the afterglow characteristics, which led to the completion of this invention. It is.
すなわち、この発明に係る投写形陰極線管は、
螢光体層をY2SiO5：TbとZn2SiO4：Mnとの混合
物で形成し、かつ、この混合螢光体中の上記
Zn2SiO4：Mnの混合比を20〜50重量％の範囲に
設定したことを特徴とする。 That is, the projection cathode ray tube according to the present invention is
The phosphor layer is formed of a mixture of Y 2 SiO 5 :Tb and Zn 2 SiO 4 :Mn, and the above-mentioned components in this mixed phosphor are
It is characterized in that the mixing ratio of Zn 2 SiO 4 :Mn is set in the range of 20 to 50% by weight.
［作用］
この発明によれば、Y2SiO5：Tbに上記P1を20
〜50重量％の範囲の混合比で混合することによ
り、残光特性の低下が防がれるとともに、色の飽
和度が高められる。[Operation] According to this invention, 20% of the above P1 is added to Y 2 SiO 5 :Tb.
By mixing at a mixing ratio in the range of ~50% by weight, deterioration of afterglow properties can be prevented and color saturation can be increased.
［発明の実施例］
第１図にY2SiO5：TbとP1の両者の電流対輝度
特性を示す。図中、実線で示す直線Ａは
Y2SiO5：Tbの、破線で示す直線ＢはP1の特性で
ある。また、第２図にY2SiO5：TbとP1の両者の
混合比による色度点の移動を示す。曲線ｘはＸ座
標に、曲線ｙはＹ座標に対応する。[Embodiments of the Invention] FIG. 1 shows the current versus brightness characteristics of both Y 2 SiO 5 :Tb and P1. In the figure, straight line A shown as a solid line is
The straight line B shown by the broken line of Y 2 SiO 5 :Tb is the characteristic of P1. Further, FIG. 2 shows the movement of the chromaticity point depending on the mixing ratio of both Y 2 SiO 5 :Tb and P1. The curve x corresponds to the X coordinate, and the curve y corresponds to the Y coordinate.
Y2SiO5：TbとP1との混合比は、残光特性と色
の飽和度とのかねあいで決定される。つまり、上
記実験結果から、短残光（残光特性良）ながら色
飽和度が低いY2SiO5：Tbに高飽和度ながら長残
光性のP1を50重量％以下で混合すると、残光が
短くなつて視感的な色評価が向上し、また、20重
量％以上でP1を混合すると色の飽和度が高くな
る。したがつて、P1の混合比を上記範囲内に設
定することにより、色の飽和度が高く、しかも、
残光特性が良好な投写形陰極線管の螢光体層を得
ることができる。 The mixing ratio of Y 2 SiO 5 :Tb and P1 is determined based on the balance between afterglow characteristics and color saturation. In other words, from the above experimental results, when P1, which has high saturation and long afterglow properties, is mixed with Y 2 SiO 5 :Tb, which has a short afterglow (good afterglow properties) but low color saturation, at 50% by weight or less, the afterglow does not increase. Visual color evaluation improves as the time becomes shorter, and color saturation increases when P1 is mixed in an amount of 20% by weight or more. Therefore, by setting the mixing ratio of P1 within the above range, color saturation is high, and
A phosphor layer for a projection cathode ray tube with good afterglow characteristics can be obtained.
［発明の効果］
以上説明したように、この発明の投写形陰極線
管は、従来では達成できなかつた良好な色飽和度
を示すとともに、この色飽和度を高く維持しなが
ら残光特性をも改善できるという格別の効果が得
られる。[Effects of the Invention] As explained above, the projection cathode ray tube of the present invention exhibits good color saturation that could not be achieved conventionally, and also improves afterglow characteristics while maintaining this high color saturation. You can get the special effect that you can.
第１図はY2SiO5：TbとZn2SiO4：Mnの両者の
電流と輝度の相関を示す特性図、第２図は上記両
者の混合比と色度点の移動を示す特性図である。
Ａ…Y2SiO5：Tb、Ｂ…Zn2SiO4：Mn。
Figure 1 is a characteristic diagram showing the correlation between current and brightness for both Y 2 SiO 5 :Tb and Zn 2 SiO 4 :Mn, and Figure 2 is a characteristic diagram showing the mixing ratio of the two and the movement of the chromaticity point. be. A... Y2SiO5 :Tb, B ... Zn2SiO4 : Mn.
Claims (1)
有する投写形陰極線管において、上記螢光体層
が、Y2SiO5：Tbの構造式で表わされる螢光体
と、Zn2SiO4：Mnの構造式で表わされる螢光体
との混合物によつて形成され、かつ、上記混合螢
光体中のZn2SiO4：Mnが20〜50重量％であるこ
とを特徴とする投写形陰極線管。1. In a projection cathode ray tube having a phosphor layer on the inner surface of the face portion of a glass bulb, the phosphor layer includes a phosphor represented by the structural formula of Y 2 SiO 5 :Tb and Zn 2 SiO 4 :Mn. A projection cathode ray tube formed of a mixture with a phosphor represented by the structural formula, and characterized in that Zn 2 SiO 4 :Mn in the mixed phosphor is 20 to 50% by weight. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16890980A JPS5790851A (en) | 1980-11-27 | 1980-11-27 | Cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16890980A JPS5790851A (en) | 1980-11-27 | 1980-11-27 | Cathode ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5790851A JPS5790851A (en) | 1982-06-05 |
| JPS6354754B2 true JPS6354754B2 (en) | 1988-10-31 |
Family
ID=15876805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16890980A Granted JPS5790851A (en) | 1980-11-27 | 1980-11-27 | Cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5790851A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949279A (en) * | 1982-09-16 | 1984-03-21 | Hitachi Ltd | Color picture tube |
| JPS5956481A (en) * | 1982-09-24 | 1984-03-31 | Toshiba Corp | Combined phosphor |
| DE3248448A1 (en) * | 1982-12-29 | 1984-07-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | FLUORESCENT FOR CATHODE RADIATION TUBES |
| KR100284328B1 (en) * | 1993-02-11 | 2001-04-02 | 김순택 | Mixed green light-emitting phosphor and cathode ray tube using the same |
| JP2004263068A (en) * | 2003-02-28 | 2004-09-24 | Toshiba Corp | Green light emitting fluorescent substance for low voltage/high current density use, and field emission type display unit using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084476A (en) * | 1973-11-30 | 1975-07-08 | ||
| JPS5460554A (en) * | 1977-10-21 | 1979-05-16 | Mitsubishi Electric Corp | Luminous screen for cathode-ray tube |
-
1980
- 1980-11-27 JP JP16890980A patent/JPS5790851A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084476A (en) * | 1973-11-30 | 1975-07-08 | ||
| JPS5460554A (en) * | 1977-10-21 | 1979-05-16 | Mitsubishi Electric Corp | Luminous screen for cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5790851A (en) | 1982-06-05 |
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