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| Number | Title | Issue Date |
| 7298093 | Method and device for driving CCFL circuit A driving device for a CCFL circuit comprising at least one CCFL is provided. The driving device comprising at least one heating device controlling the temperature of the at least one CCFL, a power supply outputting a first voltage, and a switching device having a f... | 11/20/2007 |
| 7127189 | Heating unit, auxiliary power unit, fixing unit, and image forming apparatus A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the power saving mode. A charge control circuit compares a terminal volt... | 10/24/2006 |
| 7121682 | Scanning device The present invention provides a scanning device including a lamp, an object, and a transparency (or a reflector). The present invention changes the optical path by varying the shape of tube wall of lamp, the transparency or the reflector to compensate the light in ... | 10/17/2006 |
| 7034467 | Controller for suppressing temperature of screen The present invention discloses a controller for suppressing the temperature of a screen in order to maintain the ambient temperature of the screen to the level of a predetermined standard temperature as to avoid the screen from being operated at abnormal temperatur... | 04/25/2006 |
| 6838834 | Lighting system and electric power supplier for the same An electronic ballast of a lighting system includes an output power supplier and a heater power supplier. The output power supplier is configured to supply electric power to a lamp of the lighting system. The heater power supplier is configured to provide substantia... | 01/04/2005 |
| 6724160 | Ion-source neutralization with a hot-filament cathode-neutralizer In accordance with one embodiment of the present invention, the ion-beam apparatus takes the form of a gridless ion source with a hot-filament cathode-neutralizer, in which the hot filament is heated with a current from the cathode-neutralizer heater. The cathode-ne... | 04/20/2004 |
| 6720744 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 04/13/2004 |
| 6664742 | Filament cut-back circuit A filament cut-back circuit comprises an impedance circuit coupled in series between either an AC voltage source and a primary filament winding, or a secondary filament winding and a filament. In response to an alternating voltage from the AC voltage sour... | 12/16/2003 |
| 6149279 | Indicating instrument for vehicle A straight cold cathode fluorescent lamp is detachably held at the back of a dial plate by a plurality of fork-shaped holders to illuminate a plurality of scales formed on the front surface of the dial plate and accommodated in the reflector which is also... | 11/21/2000 |
| 6066920 | Illumination device, method for driving the illumination device and display including the illumination device An illumination device includes a cold cathode fluorescent tube having a heat capacity of 0.035 Wsec/° C. or less per unit length (1 cm) of a glass tube of a fluorescent section of the cold cathode fluorescent tube. The illumination device has a superior... | 05/23/2000 |
| 6006661 | Stamp-making apparatus, as well as function changeover mechanism, exposure system and stamp-making object material-detecting device therefor A stamp-making apparatus is provided in which a transparent presser plate is arranged such that the presser plate is parallel with a stamp-making object material, an ink ribbon having a stamp image formed thereon is urged against the stamp-making object m... | 12/28/1999 |
| 5659227 | Fluorescent lamp controller and original-document exposing apparatus a having the fluorescent lamp contoller A fluorescent lamp controller for an original-document exposing apparatus includes a detection circuit for detecting the quantity of light emitted by a fluorescent lamp, an actuator for applying between filaments of the fluorescent lamp a voltage having a... | 08/19/1997 |
| 5406172 | Light source intensity control device A light source device having a controlled current source that maintains a constant intensity of light from the source during changes in light source temperature, particularly at warm-up. The light source is heated to speed up warm-up and to maintain const... | 04/11/1995 |
| 5272472 | Apparatus for addressing data storage elements with an ionizable gas excited by an AC energy source An apparatus for addressing data storage elements (16) uses an ionizable gas excited by an AC energy source to store an analog datum in and read an analog datum out of each of the storage elements. The storage elements are defined by the overlapping areas... | 12/21/1993 |
| 5229842 | Method and apparatus for controlling fluorescent lamp mercury vapor pressure A fluorescent lamp light output is maximized by cooling the cathode regions. Mercury vapor pressure is maintained at an optimum or desired level for light production by cooling the cathode areas of the lamp. The cooled cathode areas of the lamp collect ca... | 07/20/1993 |
| 5189340 | Fluorescent lamp assebmly for image scanner In a fluorescent lamp assembly for use in an image scanner, a heater is associated with a glass tube of a fluorescent lamp for heating the glass tube. A controller is provided for controlling the heater in such a manner as to maintain temperture of the gl... | 02/23/1993 |
| 5182432 | Crack detector and heating circuit for motor vehicle headlight light transmissive shield A circuit arrangement for a motor vehicle headlight including a reflector and/or a lens, a light source coupled to a voltage providing device (W), at least one electrically conductive heating element (H) mounted on or in an enclosing light-transmissive sh... | 01/26/1993 |
| 5059860 | Illuminating light source for color image recording device An illuminating light source for a color image recording device comprises a glass tube having a predetermined diameter, a reflecting film coated on an inner wall of the glass tube excepting a part thereof by coating, a fluorescent film formed on the refle... | 10/22/1991 |
| 4941743 | High stability high intensity atomic emission light source A highly stable high intensity atomic emission light source has a discharge region and the sample region each controlled by a separate heater. The sample region heater is controlled by a lamp stabilizer circuit which maintains the breakdown voltage within... | 07/17/1990 |
| 4922373 | Overtemperature protector for incandescent lamp An overtemperature protector for an incandescent lamp socket housing comprises a glass enclosed circuit breaker and an electrical heater in proximate heat transfer relationship therewith. The heater is in series with the circuit breaker so that when the c... | 05/01/1990 |
| 4899085 | Igniting device for a high-pressure discharge lamp capable of battery voltage compensation In an operating apparatus of a high-pressure discharge lamp of the invention, power is supplied to a heater provided in a high-pressure discharge lamp from a battery. The battery is charged by a charger which is driven by a power section. The power sectio... | 02/06/1990 |
| 4891563 | Circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps A circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps to a given nominal value, comprises a controllable current limiter connected in series with the lamp and an adjustment circuit (3) for controlling the latter. T... | 01/02/1990 |
| 4837655 | Overtemperature protector for incandescent lamp An overtemperature protector for an incandescent lamp socket housing comprises a glass enclosed circuit breaker and an electrical heater in proximate heat transfer relationship therewith. The heater is in series with the circuit breaker so that when the c... | 06/06/1989 |
| 4801840 | Discharge lamp having automatically controlled preheating device attached to envelope To provide for preheating of a high-pressure discharge lamp (6) having a charge vessel (7) closed off by a pinch or press seal (8), a ceramic holder (1), typically a ceramic tube with multiple capillary openings therein, has a heating wire threaded throu... | 01/31/1989 |
| 4798997 | Lighting device A discharge tube adapted to produce a light by an extraneous high frequency electromagnetic field is heated before discharge to thereby improve the rising-up of the discharge and achieve uniformization of emitted light. Further, the discharge tube is heat... | 01/17/1989 |
| 4675573 | Method and apparatus for quickly heating a vacuum tube cathode Disclosed are a method and apparatus for rapidly heating a thermionic vacuum tube cathode, thereby enabling the vacuum tube to be placed in useful operation shortly after the tube is switched on. Rapid heating of the cathode is achieved by passing current... | 06/23/1987 |
| 4645974 | Discharge tube lighting system for use in a vehicle In a discharge tube lighting system for use in a vehicle, a heat generating element, which is made of metal material, is formed on an outer surface of a tube element of the discharge tube along the longitudinal direction of the tube element, and a tempera... | 02/24/1987 |
| 4533853 | Mechanism and method for controlling the temperature and output of a fluorescent lamp The light output of a fluorescent lamp is controlled and optimized. Both the light output and the lamp voltage peak at nearly the same value of mercury cold spot temperature. Controlling the lamp voltage therefore controls the light output. Thus, when the... | 08/06/1985 |
| 4533854 | Mechanism and method for controlling the temperature and output of a fluorescent lamp The light output of a fluorescent lamp is controlled and optimized. The light output of a lamp peaks at some optimum value of mercury cold spot temperature. During operation the lamp output is continually monitored, any drop in peak light output is detect... | 08/06/1985 |
| 4529912 | Mechanism and method for controlling the temperature and light output of a fluorescent lamp The phosphor light output of a fluorescent lamp is controlled and optimized. The phosphor light output of the lamp corresponds to a particular level of either the vapor mercury or rare fill gas contained within the lamp envelope. This gas emission level i... | 07/16/1985 |
| 4459513 | High pressure sodium vapor lamp having resistance heater means An improved high pressure sodium vapor lamp is described having resistance heater means contained within a tubular light-transmitting ceramic envelope that further contains a reservoir of sodium-mercury amalgam in excess of the quantity vaporized during l... | 07/10/1984 |
| 4447762 | Electroluminescent displays When a display incorporating electroluminescent (EL) device is switched on, the electrical resistance across electrodes and which indicates the moisture content of the EL layer is measured by electrical resistance measuring device. If the resistance is be... | 05/08/1984 |
| 4442379 | High pressure sodium vapor lamp having resistance heater means An improved high pressure sodium vapor lamp is described having resistance heater means contained within a tubular light-transmitting ceramic envelope that further contains a reservoir of sodium-mercury amalgam in excess of the quantity vaporized during l... | 04/10/1984 |
| 4442378 | High pressure sodium vapor lamp having resistance heater means An improved high pressure sodium vapor lamp is described having resistance heater means contained within a tubular light-transmitting ceramic envelope that further contains a reservoir of sodium-mercury amalgam in excess of the quantity vaporized during l... | 04/10/1984 |
| 4431947 | Controlled light source A feedback control system for maintaining the intensity and spectral distribution of light at a predetermined level at a wavelength characteristic of the excited source. Control of that intensity, which exhibits a systematic but not necessarily a monotoni... | 02/14/1984 |
| 4101807 | Method and apparatus for controlling the temperature of low pressure metal or metal halide lamps A low pressure metal or metal halide vapor lamp for photocopying applications. The low pressure sodium vapor lamp is operated in a continuous mode and provides illumination of increased brightness and of a color (yellow) which is optimum for providing a c... | 07/18/1978 |
| 4001633 | Device provided with a gas and/or vapor discharge tube A discharge lamp has an electrically conducting transparent layer and a temperature control which responds to variations of the lamp current to control lamp temperature. A control member causes an auxiliary current to flow intermittently through the said ... | 01/04/1977 |
| 3955118 | Cold-cathode ion source A cold-cathode ion source includes a specially shaped hollow anode and specially shaped anode-cathode insulators to preclude the buildup of short-circuiting bridges of sputtered cathode material. When used with solid feed material, the source can also inc... | 05/04/1976 |
