LIGHTMASTER SYSTEMS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 6199
 
  
 
G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS 2131
 
  
 
G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR 295
 
  
 
F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR 1109
 
  
 
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION 1150
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 1241

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7042610 Method and apparatus for improved waveplates and suppression of stray light in LCoS kernel applicationsMay 12, 04May 09, 06[G02B]
7012755 Use of a lens array to increase the contrast ratio produced by a LCoS microdisplayFeb 17, 04Mar 14, 06[G02B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7791675 Method and apparatus for variable retardation and adjusting light channel pathlengthsExpiredOct 05, 05Sep 07, 10[G02F]
7641346 Method and apparatus to increase the contrast ratio of the image produced by a LCoS based light engineExpiredJan 22, 07Jan 05, 10[H04N, G03B, G02F]
7570240 Method and apparatus to minimize lamp flicker and increase contrast ratio in projection devicesExpiredAug 25, 05Aug 04, 09[G09G]
7560710 Method and apparatus for increasing illuminator brightness in a liquid crystal on silicon (LCoS) based video projection systemExpiredNov 17, 05Jul 14, 09[F21V]
7556382 Illuminator that outputs linearly polarized light and that is suitable for use in microdisplay based light engine applicationsExpiredMay 13, 04Jul 07, 09[G03B]
7422329 Liquid crystal on silicon (LCOS) kernel with 3D projection capabilityExpiredJun 30, 05Sep 09, 08[G03B]
7400452 Method and apparatus for internal frames to improve performance and manufacturability of optical devices including liquid crystal on silicon (LCOS) based kernelsExpiredOct 18, 05Jul 15, 08[G02B]
7390094 Method and apparatus to achieve a neutral dark state in image projection systemsExpiredSep 15, 05Jun 24, 08[G03B]
7352513 Prism assemblies and kernel configurations for use in projection systemsExpiredDec 30, 05Apr 01, 08[G02B]
7347558 3D kernel and prism assembly designExpiredJun 29, 05Mar 25, 08[G03B]
7349048 Method and apparatus for adjusting light intensityExpiredDec 16, 04Mar 25, 08[G02F]
7327408 Illuminator that generates linearly polarized light for microdisplay based light engineExpiredNov 15, 04Feb 05, 08[H04N]
7280281 Method and apparatus for increasing microdisplay black state in light management systems and flexibility to utilize polarized or unpolarized input lightExpiredMar 05, 03Oct 09, 07[G02B]
2007/0139,625 Method and apparatus to achieve a neutral dark state in image devicesAbandonedDec 21, 05Jun 21, 07[G03B]
2007/0085,979 Method and apparatus to manage light and reduce blur in microdisplay based light enginesAbandonedOct 14, 05Apr 19, 07[G03B]
7184218 Method and apparatus for increasing quality and resolution of a projected imageExpiredNov 15, 04Feb 27, 07[G02B]
2007/0035,846 Method and apparatus for attaching microdisplays and other sensitive devicesAbandonedAug 11, 05Feb 15, 07[G02B]
7175281 Method and apparatus to increase the contrast ratio of the image produced by a LCoS based light engineExpiredMay 12, 04Feb 13, 07[G03B]
2006/0274,276 Method and apparatus for precisely compensating skew rays and residual retardationAbandonedJun 01, 05Dec 07, 06[G03B]
2006/0077,673 Means to increase the light output by the illuminator in a LCoS based light engineAbandonedOct 08, 04Apr 13, 06[B60Q]

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