GB1496438A - Electric gas discharge lamp - Google Patents
Electric gas discharge lampInfo
- Publication number
- GB1496438A GB1496438A GB18431/75A GB1843175A GB1496438A GB 1496438 A GB1496438 A GB 1496438A GB 18431/75 A GB18431/75 A GB 18431/75A GB 1843175 A GB1843175 A GB 1843175A GB 1496438 A GB1496438 A GB 1496438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pigment
- phosphor
- grams
- phosphors
- discharge
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/48—Separate coatings of different luminous materials
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Spectrometry And Color Measurement (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
1496438 Luminescent materials PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 2 May 1975 [6 May 1974] 18431/75 Heading C4S [Also in Division H1] To maintain visible or long wavelength UV emission by phosphors excited by UV of 240 nm. upward from a discharge lamp with reduced requirement for phosphors, the phosphors mixture is applied in two or more layers either on the inner wall of the discharge tube, e.g. in a low pressure Hg lamp or on the inner wall of an outer envelope in, e.g. a high pressure Hg lamp. The layer nearest the discharge contains only phosphors, while deeper layers contain additionally successively higher proportions of a white pigment. The UV specific absorption of the pigment is less than 20% and preferably less than 10% of that of the least absorbent phosphor component. Suitable phosphors for good colour rendering are 1-5 micron grains of Alternatively Mn and Sb activated Ca halophosphates may be used. For the pigment preferably somewhat finer grains of C a P 2 O 7 or BaSO 4 are suitable. In an example with the stratum nearest the discharge containing 3 grams of phosphor and the deeper stratum containing controlled proportions of phosphor and pigment, curves (Fig. 2, not shown) show that compared with a single phosphor layer containing 6À5 grams of phosphor, a slight increase in brightness is achieved with, e.g. only 5 grams of total phosphor (2 gm. in deeper layer) and 4À5 grams of pigment. Beyond 6 grams of pigment adhesion fails.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7406035,A NL169532C (en) | 1974-05-06 | 1974-05-06 | ELECTRIC GAS DISCHARGE LAMP. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1496438A true GB1496438A (en) | 1977-12-30 |
Family
ID=19821305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18431/75A Expired GB1496438A (en) | 1974-05-06 | 1975-05-02 | Electric gas discharge lamp |
Country Status (22)
| Country | Link |
|---|---|
| JP (1) | JPS53864B2 (en) |
| AR (1) | AR227264A1 (en) |
| AT (1) | AT353357B (en) |
| AU (1) | AU500609B2 (en) |
| BE (1) | BE828737A (en) |
| BR (1) | BR7502709A (en) |
| CA (1) | CA1025035A (en) |
| CH (1) | CH585967A5 (en) |
| DE (1) | DE2517962C3 (en) |
| DK (1) | DK191875A (en) |
| ES (1) | ES437425A1 (en) |
| FI (1) | FI60087C (en) |
| FR (1) | FR2270674B1 (en) |
| GB (1) | GB1496438A (en) |
| HU (1) | HU178687B (en) |
| IL (1) | IL47227A (en) |
| IN (1) | IN146322B (en) |
| IT (1) | IT1037819B (en) |
| NL (1) | NL169532C (en) |
| NO (1) | NO140211C (en) |
| SE (1) | SE400415B (en) |
| ZA (1) | ZA752760B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170095A (en) * | 1989-02-24 | 1992-12-08 | Tungsram Reszvenytarsasag | Low-pressure mercury vapor discharge light source of high wall loadability |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950009041B1 (en) * | 1985-12-16 | 1995-08-14 | 가세이옾토닉스 가부시끼가이샤 | Luminous compositions and process for their preparation and fluorescent lamp |
| JPH0636349B2 (en) * | 1989-02-22 | 1994-05-11 | 日亜化学工業株式会社 | Fluorescent lamp with ultraviolet reflective layer |
-
1974
- 1974-05-06 NL NLAANVRAGE7406035,A patent/NL169532C/en not_active IP Right Cessation
-
1975
- 1975-04-23 DE DE2517962A patent/DE2517962C3/en not_active Expired
- 1975-04-29 ZA ZA00752760A patent/ZA752760B/en unknown
- 1975-04-30 AR AR258592A patent/AR227264A1/en active
- 1975-04-30 FI FI751300A patent/FI60087C/en not_active IP Right Cessation
- 1975-05-02 CH CH564075A patent/CH585967A5/xx not_active IP Right Cessation
- 1975-05-02 IT IT22966/75A patent/IT1037819B/en active
- 1975-05-02 DK DK191875A patent/DK191875A/en unknown
- 1975-05-02 NO NO751573A patent/NO140211C/en unknown
- 1975-05-02 SE SE7505108A patent/SE400415B/en unknown
- 1975-05-02 HU HU75PI466A patent/HU178687B/en unknown
- 1975-05-02 AU AU80786/75A patent/AU500609B2/en not_active Expired
- 1975-05-02 JP JP5265775A patent/JPS53864B2/ja not_active Expired
- 1975-05-02 CA CA226,189A patent/CA1025035A/en not_active Expired
- 1975-05-02 GB GB18431/75A patent/GB1496438A/en not_active Expired
- 1975-05-03 ES ES437425A patent/ES437425A1/en not_active Expired
- 1975-05-05 IN IN902/CAL/75A patent/IN146322B/en unknown
- 1975-05-05 BR BR3459/75A patent/BR7502709A/en unknown
- 1975-05-05 IL IL47227A patent/IL47227A/en unknown
- 1975-05-05 AT AT342775A patent/AT353357B/en not_active IP Right Cessation
- 1975-05-05 BE BE156065A patent/BE828737A/en unknown
- 1975-05-06 FR FR7514137A patent/FR2270674B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5170095A (en) * | 1989-02-24 | 1992-12-08 | Tungsram Reszvenytarsasag | Low-pressure mercury vapor discharge light source of high wall loadability |
Also Published As
| Publication number | Publication date |
|---|---|
| CH585967A5 (en) | 1977-03-15 |
| DE2517962C3 (en) | 1981-02-19 |
| NO140211B (en) | 1979-04-09 |
| NO751573L (en) | 1975-11-07 |
| FR2270674B1 (en) | 1978-05-19 |
| DK191875A (en) | 1975-11-07 |
| FI60087C (en) | 1981-11-10 |
| FI751300A (en) | 1975-11-07 |
| BR7502709A (en) | 1976-03-16 |
| CA1025035A (en) | 1978-01-24 |
| JPS53864B2 (en) | 1978-01-12 |
| IL47227A0 (en) | 1975-07-28 |
| IT1037819B (en) | 1979-11-20 |
| BE828737A (en) | 1975-11-05 |
| AT353357B (en) | 1979-11-12 |
| AR227264A1 (en) | 1982-10-15 |
| FR2270674A1 (en) | 1975-12-05 |
| DE2517962A1 (en) | 1975-11-13 |
| NL169532B (en) | 1982-02-16 |
| AU8078675A (en) | 1976-11-04 |
| JPS50150287A (en) | 1975-12-02 |
| DE2517962B2 (en) | 1980-06-04 |
| ES437425A1 (en) | 1977-01-01 |
| SE7505108L (en) | 1975-11-07 |
| IL47227A (en) | 1977-01-31 |
| NL7406035A (en) | 1975-11-10 |
| NO140211C (en) | 1979-07-18 |
| NL169532C (en) | 1982-07-16 |
| HU178687B (en) | 1982-06-28 |
| IN146322B (en) | 1979-04-28 |
| FI60087B (en) | 1981-07-31 |
| AU500609B2 (en) | 1979-05-24 |
| ZA752760B (en) | 1976-12-29 |
| SE400415B (en) | 1978-03-20 |
| ATA342775A (en) | 1979-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |