EP0527240A1
Expired / Lapsed
EP
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Light projecting device
Assignee: Seiko Epson Corp
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Filing: 1992-02-28
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Granted: —
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Expires: 2012-02-28
Abstract
Abstract A light projecting device in which a plurality of light emissions can be simply controlled in a single unit. In this device, an electron emitting material (2) is formed on a base (1) via an insulation base (3), and the electron emitting material (2) is coated with a secondary electron emitting layer (14). At the opposed positions to the electron emitting material (2), provided are fluorescent material layers (8-1, 8-2, 8-3), which secondary electron beam (18) emitted from the secondary electron emitting layer (14) strikes respectively.
Inventors
- 👤 Masamitsu Uehara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:20
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/92; H01J61/94; H01J29/00; H01J29/02; H01J29/08; H01J29/085; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/15; H01J63/00; H01J63/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A light irradiation apparatus comprising an electron emitter heated by energization to emit thermoelectrons and a plurality of fluorescent members on which said emitted thermoelectrons impinge to emit light, the apparatus characterized by comprising: electron drawing means having a slit and permitting said emitted thermoelectrons to pass through said slit and draw an emitting direction of said thermoelectrons into a predetermined one direction, a control electrode applied with a predetermined voltage to direct said thermoelectrons drawn into said direction at said plurality of fluorescent members sequentially, and an electrode provided integral with each of said plurality of fluorescent members and applied with a predetermined voltage to control said thermoelectrons sequentially directed at the plurality of fluorescent members so as not to simultaneously impinge on two or more of said fluorescent members.
Claim 2
Dependent Claim
82 words
A light irradiation apparatus comprising an electron emitter heated by energization to emit thermoelectrons and a plurality of fluorescent members on which said emitted thermoelectrons impinge to emit light, the apparatus characterized by comprising: a film electrode provided integral with each of said plurality of fluorescent members, and a control electrode for sequentially switching a polarity of said electrode, wherein said emitted thermoelectrons are attracted by said electrode whose polarity is sequentially switched to sequentially impinge on said plurality of fluorescent members.
Claim 3
Dependent Claim
52 words
A light irradiation apparatus comprising an electron emitter heated by energization to emit thermoelectrons and a plurality of fluorescent members on which said emitted thermoelectrons impinge to emit light, the apparatus characterized by comprising: a condenser for respectively converging light emitted from said plurality of fluorescent members in an external predetermined directions.
Claim 4
Dependent Claim
54 words
A light irradiation apparatus comprising an electron emitter heated by energization to emit thermoelectrons and a plurality of fluorescent members on which said emitted thermoelectrons impinge to emit light, the apparatus characterized by comprising: a reflector provided to prevent light emitted from said plurality of fluorescent members from being incident on other fluorescent members.
Claim 5
Dependent Claim
18 words
The light irradiation apparatus according to Claim 4, wherein said reflector is formed of a material including gold.
Claim 6
Dependent Claim
18 words
The light irradiation apparatus according to claim 4, wherein said reflector is formed of a material including aluminum.
References Cited (Backward Citations)
No citation records indexed.
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