JPS5619031A - Driving method of light write-in liquid crystal light bulb - Google Patents

Driving method of light write-in liquid crystal light bulb

Info

Publication number
JPS5619031A
JPS5619031A JP9589879A JP9589879A JPS5619031A JP S5619031 A JPS5619031 A JP S5619031A JP 9589879 A JP9589879 A JP 9589879A JP 9589879 A JP9589879 A JP 9589879A JP S5619031 A JPS5619031 A JP S5619031A
Authority
JP
Japan
Prior art keywords
liquid crystal
light bulb
light
write
transparent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9589879A
Other languages
Japanese (ja)
Inventor
Masakazu Nakano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9589879A priority Critical patent/JPS5619031A/en
Publication of JPS5619031A publication Critical patent/JPS5619031A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE: To make responsiveness high by alternately applying the voltages of predetermined 2 values to a light bulb element comprising a cholesteric-nematic phase transition type liquid crystal.
CONSTITUTION: Transparent electrodes 11', 12' are coated on the transparent substrates 11, 12 of a liquid crystal light bulb element 1, and a liquid crystal layer 13, an inductive body mirror 14, a light shielding film 15 and a CdS photoconductor layer 16 are provided therebetween. The liquid crystal 13 comprises a cholesteric- nematic phase transition type liquid crystal. From a driving means 3, AC voltages V1 and V2 are applied at intervals of about 20ms to the transparent electodes 11', 12'. When the information from a write-in means 2 such as CRT display is inputted to the light bulb element 1, the resistance of the photoconductor layer 16 decreases in the light irradiated portions and voltage drops becomes small as well. If V1 is set high and V2 low at suitable voltages with respect to the phase transition threshold value V0 by taking the resistance of this layer 16 into consideration, the light bulb element 1 becomes transparent in the light irradiated portions and becomes opaque in the non-irradiated portions, thus the write-in of high responsiveness may be accomplished.
COPYRIGHT: (C)1981,JPO&Japio
JP9589879A 1979-07-26 1979-07-26 Driving method of light write-in liquid crystal light bulb Pending JPS5619031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9589879A JPS5619031A (en) 1979-07-26 1979-07-26 Driving method of light write-in liquid crystal light bulb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9589879A JPS5619031A (en) 1979-07-26 1979-07-26 Driving method of light write-in liquid crystal light bulb

Publications (1)

Publication Number Publication Date
JPS5619031A true JPS5619031A (en) 1981-02-23

Family

ID=14150115

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9589879A Pending JPS5619031A (en) 1979-07-26 1979-07-26 Driving method of light write-in liquid crystal light bulb

Country Status (1)

Country Link
JP (1) JPS5619031A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848528A (en) * 1981-09-18 1983-03-22 Pioneer Electronic Corp Switch circuit
JPS6465923A (en) * 1987-09-04 1989-03-13 Mitsubishi Electric Corp Driving circuit for switching element
US5144463A (en) * 1990-03-08 1992-09-01 Pioneer Electronic Corporation Liquid crystal light valve using non-monochromatic writing light

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848528A (en) * 1981-09-18 1983-03-22 Pioneer Electronic Corp Switch circuit
JPH0216059B2 (en) * 1981-09-18 1990-04-16 Pioneer Electronic Corp
JPS6465923A (en) * 1987-09-04 1989-03-13 Mitsubishi Electric Corp Driving circuit for switching element
US5144463A (en) * 1990-03-08 1992-09-01 Pioneer Electronic Corporation Liquid crystal light valve using non-monochromatic writing light

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