Apparatus for creating an even illumination of a plurality of title blocks

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

4443835

SERIAL NO

06297826

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A diaphragm having a plurality of apertures each associated with a title block on the front panel of an indicator unit is provided to cause the various title blocks to be illuminated evenly from a light source positioned behind the diaphragm. The size, number and shape of the apertures is so chosen that all of the title blocks are equally illuminated regardless of their size and regardless of their distance to the light source. Indirect light is used to prevent the formation of shadows and light spots on the title blocks.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROBERT BOSCH GMBHSTUTTGART11024

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brautigam, Rolf Markt, DE 2 23
Wesemeyer, Jurgen Nuremberg, DE 16 278
Zobl, Hartmut Furth, DE 6 140

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
YAZAKI CORPORATION (1)
* 4991537 Indicator 13 1989
 
FORD MOTOR COMPANY (1)
* 5821867 Transreflective instrument display 17 1995
 
FUJITSU LIMITED (2)
* 8496361 Illumination device including light source, light diffuser and light shield, and manufacturing method thereof 0 2010
* 2011/0228,554 ILLUMINATION UNIT, DEVICE, AND MANUFACTURING METHOD 1 2010
 
FLEXTRONICS AUTOMOTIVE INC. (1)
* 7828470 Electronic indicator with backlighting 0 2005
 
LISA DRAEXLMAIER GMBH (3)
* 6652128 Backlighting method for an automotive trim panel 51 2001
7201508 Backlighting method for an automotive trim panel 29 2003
* 2004/0017,687 Backlighting method for an automotive trim panel 6 2003
 
Magnadyne Corporation (1)
* 4812814 Indicating light 44 1988
 
Dai Nippon Insatsu Kabushiki Kaisha (1)
* 4739459 Automatic range control method for an optical density/dot percentage measuring device 2 1987
 
ELLUMINEERING, LLC (2)
* 7748148 Display sign adapted to be backlit by widely spaced light emitting diodes 7 2007
* 2009/0056,183 Display sign adapted to be backlit by widely spaced light emitting diodes 4 2007
 
TRANSPACIFIC OPTICS LLC (1)
* 5798849 Multilevel light source device 9 1996
 
HUBBELL INCORPORATED (5)
* 5459955 Lighting device used in an exit sign 30 1993
* 5526236 Lighting device used in an exit sign 62 1994
D406863 Panel for an exit sign having a curved face 8 1996
D402316 Sign having a curved face 8 1996
D406279 Combination emergency lighting device and exit sign 12 1997
 
FIAT AUTO S.P.A. (1)
* 4630184 Motor vehicle lamp, and a light unit for motor vehicles incorporating such lamps 9 1985
 
MAYTAG CORPORATION (2)
* 5660452 Indicator light for an appliance 2 1995
* 5698826 Selective back lighting of appliance control panel 10 1996
 
DUAL-LITE INC. (2)
* 5410453 Lighting device used in an exit sign 121 1993
* 5539623 Lighting device used in an exit sign 51 1994
 
SIEMENS VDO AUTOMOTIVE CORPORATION (1)
* 2005/0002,171 Light housing for instrument cluster 1 2003
 
DUAL-LITE MANUFACTURING, INC. (1)
* 5018290 Exit sign 52 1989
* Cited By Examiner