| Class 349 | LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS |
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![[List of Pre Grant Publications for class 349 subclass 1]](../as.gif) | ![[List of Patents for class 349 subclass 1]](../ps.gif) | 1 | LIQUID CRYSTAL SYSTEM |
| | 2 |  Liquid crystal for recording or imaging on photosensitive medium |
| | 5 | Projector including liquid crystal cell (s) |
| | 11 | Heads-up display |
| | 12 | Liquid crystal writing tablet |
| | 13 | Liquid crystal eyewear (glasses, goggles, etc.) |
| | 15 | Stereoscopic |
| | 16 | Liquid crystal window |
| | 17 | Computational system employing liquid crystal element (neural network, correlation device, optical computer) |
| | 18 | Variable or rotatable retarder used with other retarders to produce filtering effects (Solc, Lyot, Partial) |
| | 19 | PARTICULAR EXCITATION OF LIQUID CRYSTAL |
| | 20 | Thermal excitation |
| | 23 | Magnetic or pressure excitation |
| | 24 | Optical excitation |
| | 25 |  With photoconductive layer (e.g., spatial light modulator(SLMs)) |
| | 31 | Electron beam excitation |
| | 32 | Plasma excitation |
| | 33 | Electrical excitation of liquid crystal (i.e., particular voltage pulses, AC vs. DC, threshold voltages, etc.) |
| | 34 | With application of holding or bias voltage (i.e., voltage which does not change the optical state of the liquid crystal) |
| | 35 | For driving Grandjean to focal conic or dynamic scattering type liquid crystal |
| | 36 | Including diverse driving frequencies |
| | 37 | Polarity based driving |
| | 38 | With supplemental capacitor |
| | 40 | With antistatic elements |
| | 41 | With particular switching device |
| | 42 |  Transistor |
| | 43 |  Structure of transistor |
| | 44 |  With light block conductively connected to transistor |
| | 45 | Transferred transistor |
| | 46 | With particular gate electrode structure |
| | 48 | Plural nonredundant transistors per pixel |
| | 49 | Two terminal nonlinear switching device (e.g., N-I-N, S-I-S, Ferroelectric, etc.) |
| | 54 | Matrix including additional element (s) which correct or compensate for electrical fault |
| | 56 | PARTICULAR STRUCTURE |
| | 57 | Lens or prism separate from projection system (i.e., it is not integral part of illumination system) |
| | 58 | Holder, support, frame, or housing |
| | 61 | Particular illumination |
| | 62 | With integral optical element for guiding or distributing light from the light source |
| | 63 | Specifically for guiding light in a front-lit device |
| | 64 | Diffuser between light source and liquid crystal |
| | 65 | Edge lit type light guide behind liquid crystal |
| | 66 | Louvres |
| | 67 | Reflector having particular shape behind light source |
| | 68 | With plural diverse light sources (e.g., for day and night) |
| | 69 | Electroluminescent light source |
| | 70 | Fluorescent light source |
| | 72 | Detector of liquid crystal temperature |
| | 73 | Interconnection of plural cells in parallel (e.g., edge to edge) |
| | 74 | Interconnection of plural cells in series |
| | 75 | For compensation of birefringence effects |
| | 77 | With particular cooperation between cells (e.g., alternating selection or simultaneous selection of cells) |
| | 78 | Cell cooperation providing multicolor display |
| | 79 | With color formed by different dye in each cell |
| | 80 | With color formed by different color polarizer or color filter associated with each cell |
| | 81 | With cells being substantially identical and driven simultaneously, providing improved contrast |
| | 82 | With projection of electrodes in one cell substantially nonoverlapping that of another cell (i.e., for improving resolution) |
| | 83 | With each cell displaying a different pattern |
| | 84 | Having significant detail of cell structure only |
| | 85 | Producing a greyscale effect |
| | 86 | Microencapsulated or polymer dispersed liquid crystal |
| | 87 | For variable polarizer |
| | 88 | Polymer network liquid crystal |
| | 89 | With particular encapsulating medium |
| | 90 | With second material between liquid crystal and encapsulating medium |
| | 91 | With nonpolymer encapsulating medium |
| | 92 | Formed by particular technique |
| | 95 | Microlenses |
| | 96 | Polarizer |
| | 97 | Color |
| | 98 | Circular |
| | 99 | With particular non-zero angle between polarization axis and orientation direction |
| | 102 | With particular non-zero angle between polarization axis and compensator optical axis |
| | 103 | With particular non-zero and non-90 angle between opposite polarization axes |
| | 104 | Filter |
| | 105 | Interference filter |
| | 106 | Color filter |
| | 107 | With different liquid crystal thickness for each color of filter |
| | 108 | With plural colors for each display element (i.e., each pixel or segment) |
| | 109 | With unequal areas for different colors or with fractional shift between one line of colors and the next |
| | 110 | Opaque mask or black mask |
| | 112 | Diffuser (on viewer side of liquid crystal) |
| | 113 | Reflector |
| | 114 | Dielectric mirror (i.e., in devices excited other than by photoconductive layer) or transflector |
| | 115 | Cholesteric reflector |
| | 116 | Photoconductive element (i.e., not used for exciting) |
| | 117 | Compensator or retarder (i.e., not using liquid crystal cell) |
| | 118 | With refractive indices in the x, y, and z directions |
| | 119 | Multiple compensators |
| | 121 | With particular non-zero angle between compensator optical axis and orientation direction |
| | 122 | Particular nonoptical film or layer (e.g., adhesive layer, barrier layer) |
| | 123 | Alignment layer |
| | 124 | Formed by particular technique (e.g., Langmuir Blodgett, stretching, etc.) |
| | 125 | Having particular deposited structure (e.g., angled, plural layered) produced by vapor deposition |
| | 126 | Having structure produced by rubbing under particular rubbing conditions (e.g., particular direction, rubbing force, by using named rubbing material or roller, etc.) |
| | 127 | Formed of a liquid crystal material |
| | 128 | With different alignments on opposite substrates |
| | 129 | With plural alignments on the same substrate |
| | 130 | For perpendicular alignment |
| | 132 | For parallel alignment |
| | 133 | With chiral smectic liquid crystal (includes ferroelectric liquid crystal) |
| | 134 |  With particular pretilt angle from the alignment layer |
| | 135 | With particular polymer composition of the alignment layer (e.g., fluorine- containing aliphatic polyamide) |
| | 136 | With particular pretilt angle (i.e., with liquid crystal other than chiral smectic) |
| | 137 | Antireflection layer |
| | 138 | Insulating layer |
| | 139 | Electrode or bus detail (i.e., excluding supplemental capacitor and transistor electrodes) |
| | 140 | Formed of semiconductor material |
| | 141 | Interdigited (comb-shaped) electrodes |
| | 142 | Segmented or fixed pattern |
| | 143 | Matrix electrodes |
| | 144 | Split pixels |
| | 145 | Nonrectilinear rows and columns |
| | 146 | Nonrectangular (odd) shaped pixels |
| | 147 | Multilayer electrodes |
| | 148 | Resistance reducing electrodes |
| | 149 | Having connection detail to external circuit |
| | 153 | Liquid crystal seal |
| | 155 | Spacer |
| | 156 | Formed as walls (e.g., between pixels) or integral with substrate |
| | 157 | Plural types in single liquid crystal cell |
| | 158 | Substrate |
| | 159 | Fiberoptic faceplate |
| | 160 | With particular topology (i.e., other than for diffraction and spacers) |
| | 161 | Heating or cooling element other than for exciting |
| | 162 | Dual function layer or element |
| | 163 | Nonchiral additive in the liquid crystal material |
| | 167 | WITH SPECIFIED NONCHEMICAL CHARACTERISTIC OF LIQUID CRYSTAL MATERIAL |
| | 168 | Utilizing change between diverse phases (e.g., cholesteric to nematic) |
| | 169 | Utilizing change within liquid crystal phase (e.g., Grandjean to focal conic, etc.) |
| | 170 | Utilizing reversal in sign of dielectric anisotropy |
| | 171 | Within smectic phase |
| | 175 | Within cholesteric phase |
| | 177 | Within nematic phase |
| | 182 | CELL CONTAINING LIQUID CRYSTAL OF SPECIFIC COMPOSITION |
| | 187 | NOMINAL MANUFACTURING METHODS OR POST MANUFACTURING PROCESSING OF LIQUID CRYSTAL CELL |
| | 188 | Changing liquid crystal phase |
| | 189 | Injecting liquid crystal |
| | 190 | Sealing of liquid crystal |
| | 191 | Aligning liquid crystal with means other than alignment layer |
| | 192 | Defect correction or compensation |
| | 193 | LIQUID CRYSTAL OPTICAL ELEMENT |
| | 194 | Passive liquid crystal polarizer |
| | 195 | Antidazzle mirror formed from liquid crystal cell |
| | 196 | Beam dividing switch formed from liquid crystal cell |
| | 198 | Liquid crystal etalon |
| | 199 | Liquid crystal sensors (e.g., voltmeters, pressure sensors, temperature sensors) |
| | 200 | Liquid crystal lenses other than for eyewear |
| | 201 | Liquid crystal diffraction element |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| UTILIZING A LIQUID CRYSTAL MATERIAL (359/36) |
| FOR100 | With particular illumination (359/48) |
| FOR101 | Having optical element (e.g., curved reflector behind light source, etc.) (359/49) |
| FOR102 | Fluorescent light (e.g., FLAD type) (359/50) |
| FOR103 | Microencapsulated liquid crystal (359/51) |
| FOR105 | Plural contiguous cells (359/53) |
| FOR106 | Having electrodes arranged into rows and columns (359/54) |
| FOR107 | With liquid crystal electrode excitation (359/55) |
| FOR110 | With particular switching device (359/58) |
| FOR113 | Having particular nonelectrical detail of cell structure enclosing or adjacent liquid crystal material (359/62) |
| FOR114 | Polarizer (359/63) |
| FOR117 | Diffuser (359/69) |
| FOR119 | Particular nonoptical film or layer (e.g., adhesive layer, barrier layer, etc.) (359/74) |
| FOR124 | Substrate (359/82) |
| FOR125 | Holder, support, or frame (359/83) |
| FOR126 | With specified electrode excitation characteristic of liquid crystal material (359/84) |
| FOR128 | With detector of liquid crystal temperature (359/86) |
| FOR129 | Electrode detail (359/87) |
| FOR131 | Birefringers effect (359/93) |
| FOR132 | Variable index of refraction (359/94) |
| FOR133 | Variable diffraction (359/95) |
| FOR134 | Variable absorption of light due to an additive in the liquid crystal material (359/96) |
| FOR137 | With specified nonchemical characteristic of liquid crystal material (359/99) |
| FOR138 | Within smectic phase (359/100) |
| FOR139 | Within cholestric phase (359/101) |
| FOR140 | Within nematic phase (359/102) |
| FOR141 | Cell containing liquid crystal of specified composition (359/103) |