JPS54116137A - Circuit system of thin film el element - Google Patents

Circuit system of thin film el element

Info

Publication number
JPS54116137A
JPS54116137A JP2384478A JP2384478A JPS54116137A JP S54116137 A JPS54116137 A JP S54116137A JP 2384478 A JP2384478 A JP 2384478A JP 2384478 A JP2384478 A JP 2384478A JP S54116137 A JPS54116137 A JP S54116137A
Authority
JP
Japan
Prior art keywords
voltage
write
thin film
value
turned
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
JP2384478A
Other languages
Japanese (ja)
Other versions
JPS62511B2 (en
Inventor
Masahiro Ise
Kenzo Inazaki
Katsuyuki Machino
Chuji Suzuki
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP2384478A priority Critical patent/JPS54116137A/en
Publication of JPS54116137A publication Critical patent/JPS54116137A/en
Publication of JPS62511B2 publication Critical patent/JPS62511B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

PURPOSE: To enable to write-in in intermediate tone, by applying maintenace voltage to the thin film EL layer, and providing the circuit superimposing the write-in voltage on it and the circuit changing the value of voltage depending on the data signal.
CONSTITUTION: Before write-in operation to the thin EL element, the transistor Tr 65 is turned on and the potential across the both ends of the capacitor C64 is made zero with DIS signal. Simultaneously, a given value is set to the D/A converter 91. As a result, the voltage at the point D is a suitable write-in voltage subtracting the voltage of the write-in voltage source 63 by the voltage drop of the resistor 93. Next, Tr 52 is turned on with the signal T2, the voltage at the point D is fed to C64, and the voltage across C64 is set to the suitable write-in voltage. The value of C64 is selected greater so that almost no potential decrease is caused with the write-in to EL, and when charged up to the write-in voltage once, the voltage is maintanined as it is. Succeedingly, with the write-in, the selected video element of EL element is written in and by changing the voltage of the voltage source 63, the write-in of intermediate tone can be made.
COPYRIGHT: (C)1979,JPO&Japio
JP2384478A 1978-03-01 1978-03-01 Circuit system of thin film el element Granted JPS54116137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2384478A JPS54116137A (en) 1978-03-01 1978-03-01 Circuit system of thin film el element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2384478A JPS54116137A (en) 1978-03-01 1978-03-01 Circuit system of thin film el element

Publications (2)

Publication Number Publication Date
JPS54116137A true JPS54116137A (en) 1979-09-10
JPS62511B2 JPS62511B2 (en) 1987-01-08

Family

ID=12121703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2384478A Granted JPS54116137A (en) 1978-03-01 1978-03-01 Circuit system of thin film el element

Country Status (1)

Country Link
JP (1) JPS54116137A (en)

Also Published As

Publication number Publication date
JPS62511B2 (en) 1987-01-08

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