Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
  • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
  • H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
• • G—PHYSICS
  • G04—HOROLOGY
  • G04G—ELECTRONIC TIME-PIECES
  • G04G9/00—Visual time or date indication means
  • G04G9/0023—Visual time or date indication means by light valves in general
  • G04G9/0029—Details
  • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage

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• Physics & Mathematics (AREA)
• Nonlinear Science (AREA)
• General Physics & Mathematics (AREA)
• Mathematical Physics (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Optics & Photonics (AREA)
• Liquid Crystal Display Device Control (AREA)
• Oscillators With Electromechanical Resonators (AREA)
• Electric Clocks (AREA)
• Liquid Crystal (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23808523

Family Applications (2)

Family Applications Before (1)

Country Status (10)

Families Citing this family (5)

Family Cites Families (4)

• 1974
  • 1974-03-27 US US455372A patent/US3873888A/en not_active Expired - Lifetime
• 1975
  • 1975-01-07 GB GB581/75A patent/GB1485061A/en not_active Expired
  • 1975-01-13 JP JP50006915A patent/JPS50129241A/ja active Pending
  • 1975-01-13 DE DE2501114A patent/DE2501114C3/de not_active Expired
  • 1975-01-14 CA CA217,856A patent/CA1033480A/en not_active Expired
  • 1975-01-22 CH CH74475D patent/CH74475A4/xx unknown
  • 1975-01-22 FR FR7501997A patent/FR2266207B1/fr not_active Expired
  • 1975-01-22 CH CH74475A patent/CH610713B5/xx not_active IP Right Cessation
  • 1975-03-07 SU SU7502111764A patent/SU563931A3/ru active
• 1980
  • 1980-10-02 HK HK551/80A patent/HK55180A/xx unknown
• 1981
  • 1981-12-30 MY MY199/81A patent/MY8100199A/xx unknown

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