| Patents > Guidance, Tools, and Manuals > Classification > Class Schedule |
|
|
|
| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
|
| You are viewing a USPC Schedule. |
|
| Class 349 | LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS |
| Click here for a printable version of this file | |
![[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) |
