US5079681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating apparatus
Assignee: Toshiba Lighting and Technology Corp
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Filing: 1990-03-20
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Granted: 1992-01-07
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Expires: 2010-03-20
Abstract
Abstract An illuminating apparatus including a casing having an open side, a light reflective surface formed on the interior of the casing, a light diffusive transmission member on the casing and covering the open side, a discharge lamp mounted in the casing underneath the light diffusive transmission member, a first heating element disposed between the discharge lamp and the light reflective surface and a second heating element disposed between the discharge lamp and the light diffusive transmission member.
Inventors
- 👤 Masaharu Baba
- 👤 Yasuhiro Nieda
- 👤 Akihiko Komatsuzaki
- 👤 Takao Mizukami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; F; F21; F21V; F21V13/00; F21V13/02; F21V13/04; F21V29/00; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133602; G02F1/133604; G09; G09F; G09F13/00; G09F13/04; G09F13/0409; H; H01; H01J; H01J61/00; H01J61/02; H01J61/52; F21V3/00; F21V3/02; G02F1/133605; G02F1/133606
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
91 words
An illuminating apparatus comprising: a casing having an open side; a light reflective surface formed on an interior surface of the casing; a light diffusive transmission member covering the open side; a discharge lamp mounted in the casing underneath the light diffusive transmission member; a first heating element disposed between the discharge lamp and the light reflective surface; and a second heating element disposed between the discharge lamp and the transmission member the first and second heating elements being spaced so as to allow the discharge lamp to emit light therebetween.
Claim 2
Dependent Claim
91 words
An illuminating apparatus comprising: a casing having an open side; a light reflective surface formed on an interior surface of the casing; a light diffusive transmission member covering the open side; a discharge lamp mounted in the casing underneath the light diffusive transmission member; a first heating element disposed between the discharge lamp and the light reflective surface; and a second heating element disposed between the discharge lamp and the transmission member the first and second heating elements being spaced so as to allow the discharge lamp to emit light therebetween.
Claim 3
Dependent Claim
18 words
An illuminating apparatus as in claim 1, wherein the first heating element is disposed on the discharge lamp.
Claim 4
Dependent Claim
19 words
An illuminating apparatus as in claim 1, wherein the first heating element is disposed on the light reflective surface.
Claim 5
Dependent Claim
18 words
An illuminating apparatus as in claim 1, wherein the second heating element is disposed on the discharge lamp.
Claim 6
Dependent Claim
20 words
An illuminating apparatus as in claim 1, wherein the second heating element is disposed on the light diffusive transmission member.
Claim 7
Dependent Claim
18 words
An illuminating apparatus as in claim 1, wherein the second heating element is formed as a mesh pattern.
Claim 8
Dependent Claim
42 words
An illuminating apparatus as in claim 6, wherein the second heating element is formed as a thin mesh pattern at points closest to the light diffusive transmission member and a thick mesh pattern at points furthest from the light diffusive transmission member.
Claim 9
Dependent Claim
38 words
An illuminating apparatus as in claim 6, wherein the second heating element is formed as a thin mesh pattern at points closest to the discharge lamp and a thick mesh pattern at points furthest from the discharge lamp.
Claim 10
Dependent Claim
18 words
An illuminating apparatus as in claim 1, wherein the second heating element is formed as a stripe pattern.
Claim 11
Dependent Claim
36 words
An illuminating apparatus as in claim 9, wherein the stripe pattern is thin at the points closes to the light diffusive transmission member and is thick at the points furthest from the light diffusive transmission member.
Claim 12
Dependent Claim
40 words
An illuminating apparatus as in claim 9, wherein the second heating element is formed as a thin stripe pattern at the points closest to the discharge lamp and a thick stripe pattern at the points farthest from the discharge lamp.
Claim 13
Independent Claim
137 words
A method of providing illumination from a mercury vapor discharge lamp having a bulb filled with vapor, the discharge lamp being used with a light reflective surface on one side of an illuminating apparatus and a light diffusive transmission member on an opposite side of the illuminating apparatus, comprising the steps of: disposing a first heating element between the discharge lamp and the light reflective surface; disposing a second heating element between the discharge lamp and the transmission member the positions of the first and second heating elements being selected such that there is a space therebetween for light from the discharge lamp to pass therebetween; activating a power source; and providing power from the power source to the discharge lamp, first heating element, and second heating element, for achieving a rated vapor pressure of the mercury.
Claim 14
Independent Claim
137 words
A method of providing illumination from a mercury vapor discharge lamp having a bulb filled with vapor, the discharge lamp being used with a light reflective surface on one side of an illuminating apparatus and a light diffusive transmission member on an opposite side of the illuminating apparatus, comprising the steps of: disposing a first heating element between the discharge lamp and the light reflective surface; disposing a second heating element between the discharge lamp and the transmission member the positions of the first and second heating elements being selected such that there is a space therebetween for light from the discharge lamp to pass therebetween; activating a power source; and providing power from the power source to the discharge lamp, first heating element, and second heating element, for achieving a rated vapor pressure of the mercury.
Claim 15
Dependent Claim
21 words
An illuminating apparatus as in claim 1, wherein the light diffusive transmission member has a wide portion facing the discharge lamp.
Claim 16
Dependent Claim
35 words
An illuminating apparatus as in claim 13, wherein the width of the wide portion decreases from a portion thereof directly opposite the center of the lamp towards the peripheries of the light diffusive transmission member.
Claim 17
Dependent Claim
44 words
A method as claimed in claim 12, wherein the step of disposing the second heating element between the discharge lamp and the light diffusive transmission member includes the step of disposing the second heating element on a surface of the light diffusive transmission member.
Claim 18
Independent Claim
119 words
A method of providing illumination from a mercury vapor discharge lamp having a bulb filled with vapor, the discharge lamp being used with a light reflective surface on one side of an illuminating apparatus and a light diffusive transmission member on an opposite side of the illuminating apparatus, comprising the steps of: disposing a first heating element between the discharge lamp and the light reflective surface; disposing a second heating element on a surface of the light diffusive transmission member between the discharge lamp and the transmission member; activating a power source; and providing power from the power source to the discharge lamp, first heating element, and second heating element, for achieving a rated vapor pressure of the mercury.
Claim 19
Independent Claim
119 words
A method of providing illumination from a mercury vapor discharge lamp having a bulb filled with vapor, the discharge lamp being used with a light reflective surface on one side of an illuminating apparatus and a light diffusive transmission member on an opposite side of the illuminating apparatus, comprising the steps of: disposing a first heating element between the discharge lamp and the light reflective surface; disposing a second heating element on a surface of the light diffusive transmission member between the discharge lamp and the transmission member; activating a power source; and providing power from the power source to the discharge lamp, first heating element, and second heating element, for achieving a rated vapor pressure of the mercury.
Claim 20
Dependent Claim
78 words
An illuminating apparatus comprising: a casing having an open side; a light reflective surface formed on an interior surface of the casing; a light diffusive transmission member covering the open side; a discharge lamp mounted in the casing underneath the light diffusive transmission member; a first heating element disposed between the discharge lamp and the light reflective surface; and a second heating element disposed on the light diffusive transmission member, between the discharge lamp and the transmission member.
Claim 21
Dependent Claim
78 words
An illuminating apparatus comprising: a casing having an open side; a light reflective surface formed on an interior surface of the casing; a light diffusive transmission member covering the open side; a discharge lamp mounted in the casing underneath the light diffusive transmission member; a first heating element disposed between the discharge lamp and the light reflective surface; and a second heating element disposed on the light diffusive transmission member, between the discharge lamp and the transmission member.
References Cited (Backward Citations)
US2581959A
Cited
US3779640A
Cited
US3942062A
Cited
US4432044A
Cited
US4488208A
Cited
JPS6347789A
Cited
JPS63120066A
Cited
US4931685A
Cited
US4916580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |