JPS6440893A - Liquid crystal drive voltage correction circuit - Google Patents

Liquid crystal drive voltage correction circuit

Info

Publication number
JPS6440893A
JPS6440893A JP19619487A JP19619487A JPS6440893A JP S6440893 A JPS6440893 A JP S6440893A JP 19619487 A JP19619487 A JP 19619487A JP 19619487 A JP19619487 A JP 19619487A JP S6440893 A JPS6440893 A JP S6440893A
Authority
JP
Japan
Prior art keywords
liquid crystal
emitter
signal
switching element
amplifier circuit
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.)
Granted
Application number
JP19619487A
Other languages
Japanese (ja)
Other versions
JPH0682265B2 (en
Inventor
Masataka Otsuka
Yoichiro Hashimoto
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62196194A priority Critical patent/JPH0682265B2/en
Publication of JPS6440893A publication Critical patent/JPS6440893A/en
Publication of JPH0682265B2 publication Critical patent/JPH0682265B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

PURPOSE: To faithfully reproduce the change of light transmissivity to an input signal by providing a switching element on the side of the emitter of a liquid crystal driving voltage amplifier circuit and changing impedance on the side of emitter before and after the determined threshold. CONSTITUTION: The signal voltage of a red, green or blue primary color signal 1 is amplified with a gain RC/RE by a liquid crystal driving voltage amplifier circuit by representing the collector resistance 6 of a signal amplifying transistor 5 by RC and the emitter resistance by RE, transferred to a liquid crystal driving circuit 10 and drives a liquid crystal panel 11. When the signal voltage becomes large and exceeds the threshold voltage of a threshold power source 9, a switching element 8 is turned on, the emitter resistance 4 of the transistor 5 and the emitter resistance 7 of the switching element 8 are connected in parallel on the AC level, the impedance on the emitter side of the amplifier circuit 2 is changed and the gain is controlled.
JP62196194A 1987-08-07 1987-08-07 Liquid crystal drive voltage correction circuit and liquid crystal display device using the same Expired - Lifetime JPH0682265B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62196194A JPH0682265B2 (en) 1987-08-07 1987-08-07 Liquid crystal drive voltage correction circuit and liquid crystal display device using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62196194A JPH0682265B2 (en) 1987-08-07 1987-08-07 Liquid crystal drive voltage correction circuit and liquid crystal display device using the same

Publications (2)

Publication Number Publication Date
JPS6440893A true JPS6440893A (en) 1989-02-13
JPH0682265B2 JPH0682265B2 (en) 1994-10-19

Family

ID=16353757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62196194A Expired - Lifetime JPH0682265B2 (en) 1987-08-07 1987-08-07 Liquid crystal drive voltage correction circuit and liquid crystal display device using the same

Country Status (1)

Country Link
JP (1) JPH0682265B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7202310B2 (en) 1997-04-18 2007-04-10 Kaneka Corporation Polymers, processes for producing the same, and curable compositions produced therefrom

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61141218A (en) * 1984-12-14 1986-06-28 Sumitomo Electric Ind Ltd Voltage controlled oscillator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61141218A (en) * 1984-12-14 1986-06-28 Sumitomo Electric Ind Ltd Voltage controlled oscillator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7202310B2 (en) 1997-04-18 2007-04-10 Kaneka Corporation Polymers, processes for producing the same, and curable compositions produced therefrom

Also Published As

Publication number Publication date
JPH0682265B2 (en) 1994-10-19

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