DE2051099A1 - Fluorescent mixture for cathode ray tubes - Google Patents
Fluorescent mixture for cathode ray tubesInfo
- Publication number
- DE2051099A1 DE2051099A1 DE19702051099 DE2051099A DE2051099A1 DE 2051099 A1 DE2051099 A1 DE 2051099A1 DE 19702051099 DE19702051099 DE 19702051099 DE 2051099 A DE2051099 A DE 2051099A DE 2051099 A1 DE2051099 A1 DE 2051099A1
- Authority
- DE
- Germany
- Prior art keywords
- cathode ray
- ray tubes
- yttrium
- fluorescent
- mixture
- 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
- 239000000203 mixture Substances 0.000 title claims description 8
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 7
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052771 Terbium Inorganic materials 0.000 claims description 4
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 2
- 150000003746 yttrium Chemical class 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 241001282110 Pagrus major Species 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/77742—Silicates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Description
Zusatz zu DBP «.. (P 20 35 258.3)Addition to DBP ".. (P 20 35 258.3)
Die Erfindung bezieht sich auf eine Leuchtstoffmischung für einen Leuchtschirm in Elektronenstrahlröhren und insbesondere auf die chemische Zusammensetzung dieser Mischung. In der älteren Anmeldung P 20 35 258.3 wird eine Elektronenstrahlröhre, vorzugsweise für Lichtstrahlabtastung, angegeben, deren Leuchtschirm zu mehr als 90% aus einem Yttriumsilikat-Leuchtstoff besteht, welcher mit Terbium aktiviert ist, und dessen Aktivatormenge 10"" bis 10 % beträgt. Vorzugsweise soll das Yttrium]-silikat in Form des Orthosilikats mit 3-wertigem Terbium aktiviert verwendet sein.The invention relates to a phosphor mixture for a fluorescent screen in cathode ray tubes and in particular to the chemical composition of this mixture. In the earlier application P 20 35 258.3, a cathode ray tube, preferably for light beam scanning, is specified, the luminescent screen of which consists of more than 90% yttrium silicate phosphor activated with terbium, and the amount of activator is 10 "" to 10%. The yttrium] silicate should preferably be used in the form of the orthosilicate activated with trivalent terbium.
Bei Versuchen mit einer Abtaströhre mit einem Leuchtschirm a>tfä diesem Material ergab sich, daß der blau-grün leuchtende Leucht stoff eine sehr kurze Abklingzeit hat und eine günstige Lichtausbeute besitzt. Bei der Anwendung dieser Röhre zur Abtasttmg von Farbfilmen zeigte es sich jedoch, daß das Emissionsspektrum des neuen Leuchtstoffs zu wenig Rot enthält, sodaß für die Ableitung einer elektrischen Signalkomponente für rotes Licht zu wenig Energie zurVerfügung steht. Die Folge hiervon ist, daß das Signal- zu Rauschverhältnis im Rotkanal ungünstiger ausfällt als in den anderen Kanälen.In experiments with a scanning tube with a fluorescent screen a> tfä This material showed that the blue-green luminous substance has a very short decay time and a favorable light output owns. When using this tube for scanning from color films, however, it was found that the emission spectrum of the new phosphor contains too little red, so that an electrical signal component for red light is too little energy is available. The consequence of this is that the signal-to-noise ratio in the red channel turns out to be less favorable than in the other channels.
We.yen des ausserordentlich kurzen Nachleuchtens des Yttriumsilikats ist es nicht möglich, irgend einen bekannten rot-emittieren den Leuchtstoff als I.iischkomponente zuzusetzen, und einen Leucht scliix'm aus dieser Mischung herzustellen, weil bei schnellbewegten Gegenständen im Fernsehbild ein Nachziehen beobachtbar sein würde; z.B. würde bei zu lang nachleuchtender Rotkomponente an bewegten Kanten ein roter Schweif erscheinen.We.yen of the extraordinarily short afterglow of the yttrium silicate it is not possible to add any known red-emitting phosphor as an essential component, and a luminescent scliix'm produce from this mixture because at fast moving Objects in the television picture would be observable; E.g. if the red component is too long afterglow, it would be on moving edges appear a red tail.
Der erfindungsgemäße Leuchtschirm für Elektronenstrahlröhren besteht aus einer Mischung von 3-wertigem terbiumaktiviertem Yttriumsilikat und von Yttriumaluminat, vorzugsweise aus , ^ « _The fluorescent screen according to the invention for cathode ray tubes consists of a mixture of trivalent terbium-activated Yttrium silicate and of yttrium aluminate, preferably from, ^ «_
209817/1212209817/1212
^TFERNSEH GMBH^ TFERNSEH GMBH
Rl.-Nr. 1401AO Orthoaluminat (Y0A Rl.-No. 1401AO orthoaluminate (Y 0 A
22 ) . Das Yttriunialuminat kann zur genaueren Angleichung der Nachleuchtzeit mit Cer aktiviert sein. Im übrigen hat sich jedoch erwiesen, daß auch das unaktivierte Yttriuinaluminat mit seinem Nachleuchtverhalten dem des Yttriurnsilikats sehr ähnlich ist, sodaß KantenVerfärbungen praktisch nicht beobachtet werden. Die Rotemission von Yttriumaluminat ist sehr kräftig, sodaß eine Beimengung von 20 bis 30% ausreicht um einen iJischleuchtstoff zu erhalten, der auch im Rotkanal eines Filmabtastgerätes ein Fernsehsignal zu gewinnen erlaubt, dessen Signal- zu Rauschenverhältnis dem der anderen Kanäle entspricht. 22 ). The yttrium aluminate can be activated with cerium for a more precise adjustment of the afterglow time. For the rest, however, it has been found that the inactivated yttrium aluminate with its afterglow behavior is very similar to that of the yttrium silicate, so that discoloration of the edges is practically not observed. The red emission of yttrium aluminate is very strong, so that an admixture of 20 to 30% is sufficient to obtain a fluorescent substance that allows a television signal to be obtained in the red channel of a film scanner, the signal to noise ratio of which corresponds to that of the other channels.
209817/1212209817/1212
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2051099A DE2051099C3 (en) | 1970-10-17 | 1970-10-17 | Fluorescent mixture for scanning tubes |
| NL7114215A NL7114215A (en) | 1970-10-17 | 1971-10-15 | |
| GB4812371A GB1342324A (en) | 1970-10-17 | 1971-10-15 | Electron beam tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2051099A DE2051099C3 (en) | 1970-10-17 | 1970-10-17 | Fluorescent mixture for scanning tubes |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2051099A1 true DE2051099A1 (en) | 1972-04-20 |
| DE2051099B2 DE2051099B2 (en) | 1974-06-12 |
| DE2051099C3 DE2051099C3 (en) | 1975-01-23 |
Family
ID=5785446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2051099A Expired DE2051099C3 (en) | 1970-10-17 | 1970-10-17 | Fluorescent mixture for scanning tubes |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2051099C3 (en) |
| GB (1) | GB1342324A (en) |
| NL (1) | NL7114215A (en) |
-
1970
- 1970-10-17 DE DE2051099A patent/DE2051099C3/en not_active Expired
-
1971
- 1971-10-15 NL NL7114215A patent/NL7114215A/xx unknown
- 1971-10-15 GB GB4812371A patent/GB1342324A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7114215A (en) | 1972-04-19 |
| DE2051099B2 (en) | 1974-06-12 |
| DE2051099C3 (en) | 1975-01-23 |
| GB1342324A (en) | 1974-01-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) |