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Class Information
Number: 349/201
Name: Liquid crystal cells, elements and systems > Liquid crystal optical element > Liquid crystal diffraction element
Description: Subject matter wherein changes in the strength of an electric field applied to a liquid crystal cell result in changes in the spacing of a grating formed in the liquid crystal material (wherein the liquid crystal alone forms the diffraction element) or wherein a liquid crystal material fills spaces between equidistant parallel lines which form a diffraction grating.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623291 |
Polarized diffractive filter and layered polarized diffractive filter |
Nov. 24, 2009 |
| 7618690 |
Polymerizable liquid crystal compound, liquid crystal composition, optical anisotropic material and optical element |
Nov. 17, 2009 |
| 7605882 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements |
Oct. 20, 2009 |
| 7570322 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements |
Aug. 4, 2009 |
| 7570405 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements |
Aug. 4, 2009 |
| 7551258 |
Patterned light modulating device |
Jun. 23, 2009 |
| 7542669 |
Diffraction display device and viewfinder display device |
Jun. 2, 2009 |
| 7511796 |
Film and optical anti-counterfeiting element |
Mar. 31, 2009 |
| 7499608 |
Apparatus and method for optical switching with liquid crystals and birefringent wedges |
Mar. 3, 2009 |
| 7499138 |
Panel and a liquid crystal display including the panel |
Mar. 3, 2009 |
| 7492439 |
Liquid crystal devices especially for use in liquid crystal point diffraction interferometer systems |
Feb. 17, 2009 |
| 7492986 |
Apparatus and method for optical switching with liquid crystals and birefringent wedges |
Feb. 17, 2009 |
| 7486350 |
Display device, viewing angle control device, electronic display device, and multiple image display device |
Feb. 3, 2009 |
| 7436471 |
Display device, viewing angle control device, electronic display device, and multiple image display device |
Oct. 14, 2008 |
| 7423719 |
Optical film using diffraction grating and display device using the same |
Sep. 9, 2008 |
| 7420733 |
Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects |
Sep. 2, 2008 |
| 7420737 |
Reconfigurable zone plate lens |
Sep. 2, 2008 |
| 7417796 |
Wavelength discrimination filter for infrared wavelengths |
Aug. 26, 2008 |
| 7417706 |
Beam steering device |
Aug. 26, 2008 |
| 7382360 |
Methods and systems for changing the appearance of a position sensor with a light effect |
Jun. 3, 2008 |
| 7362485 |
Image display medium, image writing device, and image forming apparatus |
Apr. 22, 2008 |
| 7330178 |
Display-input apparatus for a multi-configuration portable device |
Feb. 12, 2008 |
| 7327508 |
Display device using light modulator and having improved numerical aperture of after-edge lens system |
Feb. 5, 2008 |
| 7315345 |
Electro-convective diffractive device |
Jan. 1, 2008 |
| 7301601 |
Optical switching device using holographic polymer dispersed liquid crystals |
Nov. 27, 2007 |
| 7283291 |
High speed beam steering/field of view adjustment |
Oct. 16, 2007 |
| 7265882 |
Switchable polymer-dispersed liquid crystal optical elements |
Sep. 4, 2007 |
| 7227688 |
Apparatus for applying optical gradient forces |
Jun. 5, 2007 |
| 7226172 |
Illumination attenuation system |
Jun. 5, 2007 |
| 7209212 |
Tunable optical integrated element using liquid crystal as active layer |
Apr. 24, 2007 |
| 7198737 |
Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects |
Apr. 3, 2007 |
| 7184119 |
Liquid crystal device and its manufacturing method |
Feb. 27, 2007 |
| 7133203 |
Apparatus for applying optical gradient forces |
Nov. 7, 2006 |
| 7075615 |
Light separation device, blazed grating device, diffraction grating device, and illumination optical system |
Jul. 11, 2006 |
| 7072020 |
Controlling haze in holographically polymerized polymer dispersed liquid crystal optical elements |
Jul. 4, 2006 |
| 7068405 |
Switchable polymer-dispersed liquid crystal optical elements |
Jun. 27, 2006 |
| 7050233 |
Precision phase retardation devices and method of making same |
May. 23, 2006 |
| 7018686 |
Switchable volume hologram materials and devices |
Mar. 28, 2006 |
| 7019812 |
Liquid crystal optical element and an optical device |
Mar. 28, 2006 |
| 7009680 |
Narrow band tunable filter with integrated detector |
Mar. 7, 2006 |
| 6972827 |
Transflective film and display |
Dec. 6, 2005 |
| 6954252 |
Optical switch including two integrated multiphase SLM's and a wave-plate the wave-plate providing an optical retardance of (2n+1).lambda./4 |
Oct. 11, 2005 |
| 6950173 |
Optimizing performance parameters for switchable polymer dispersed liquid crystal optical elements |
Sep. 27, 2005 |
| 6930750 |
Liquid crystal optical element and three-dimensional display system including the liquid crystal optical element |
Aug. 16, 2005 |
| 6917456 |
Light modulator |
Jul. 12, 2005 |
| 6888613 |
Diffractive focusing using multiple selectively light opaque elements |
May. 3, 2005 |
| 6885414 |
Optical router switch array and method for manufacture |
Apr. 26, 2005 |
| 6875481 |
Optical laminate |
Apr. 5, 2005 |
| 6876431 |
Liquid crystal optical element and an optical device |
Apr. 5, 2005 |
| 6867888 |
Switchable polymer-dispersed liquid crystal optical elements |
Mar. 15, 2005 |
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