LightMaster Systems, Inc.
23Patents
6Active
23Granted
36Portfolio score
Filing activity: Jul 24, 2002 → Jan 22, 2007 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7175281B1 | Method and apparatus to increase the contrast ratio of the image produced by a LCoS based light engine | Physics | 38 | Expired |
| US7400452B2 | Method and apparatus for internal frames to improve performance and manufacturability of optical devices including liquid crystal on silicon (LCOS) based kernels | Electricity | 9 | Expired |
| US6909556B2 | Design of prism assemblies and kernel configurations for use in projection systems | Physics | 9 | Expired |
| US6982829B1 | Prism assembly with cholesteric reflectors | Electricity | 8 | Expired |
| US7347558B2 | 3D kernel and prism assembly design | Electricity | 7 | Expired |
| US7641346B2 | Method and apparatus to increase the contrast ratio of the image produced by a LCoS based light engine | Physics | 6 | Active |
| US7422329B2 | Liquid crystal on silicon (LCOS) kernel with 3D projection capability | Electricity | 6 | Expired |
| US7042610B1 | Method and apparatus for improved waveplates and suppression of stray light in LCoS kernel applications | Physics | 5 | Expired |
| US6934066B2 | Method and apparatus for use and construction of compensated higher order waveplates | Physics | 3 | Expired |
| US7327408B1 | Illuminator that generates linearly polarized light for microdisplay based light engine | Physics | 3 | Active |
| US6796663B2 | Method and apparatus for mounting liquid crystal on silicon (LCoS) and other sensitive devices | Physics | 2 | Expired |
| US7560710B2 | Method and apparatus for increasing illuminator brightness in a liquid crystal on silicon (LCoS) based video projection system | Electricity | 1 | Active |
| US7390094B2 | Method and apparatus to achieve a neutral dark state in image projection systems | Physics | 1 | Expired |
| US6999237B2 | Method and apparatus for configuration and assembly of a video projection light management system | Physics | 1 | Expired |
| US7012755B1 | Use of a lens array to increase the contrast ratio produced by a LCoS microdisplay | Physics | 1 | Expired |
| US7349048B1 | Method and apparatus for adjusting light intensity | Physics | 1 | Expired |
| US7006297B2 | Pathlength matched beam splitter and method and apparatus for assembly | Physics | 0 | Expired |
| US7556382B1 | Illuminator that outputs linearly polarized light and that is suitable for use in microdisplay based light engine applications | Physics | 0 | Active |
| US7570240B2 | Method and apparatus to minimize lamp flicker and increase contrast ratio in projection devices | Physics | 0 | Active |
| US7791675B2 | Method and apparatus for variable retardation and adjusting light channel pathlengths | Physics | 0 | Active |
| US6809874B1 | Pathlength matched beam splitter and method and apparatus for assembly | Physics | 0 | Expired |
| US7352513B2 | Prism assemblies and kernel configurations for use in projection systems | Physics | 0 | Expired |
| US6873480B2 | Method and apparatus for packaging optical elements | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.