JPS55146051A - Measuring method of current consumption of liquid crystal display circuit - Google Patents

Measuring method of current consumption of liquid crystal display circuit

Info

Publication number
JPS55146051A
JPS55146051A JP2586779A JP2586779A JPS55146051A JP S55146051 A JPS55146051 A JP S55146051A JP 2586779 A JP2586779 A JP 2586779A JP 2586779 A JP2586779 A JP 2586779A JP S55146051 A JPS55146051 A JP S55146051A
Authority
JP
Japan
Prior art keywords
output
integrating
current consumption
time
pulse
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
JP2586779A
Other languages
Japanese (ja)
Inventor
Fumio Goto
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 JP2586779A priority Critical patent/JPS55146051A/en
Publication of JPS55146051A publication Critical patent/JPS55146051A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: To enable to measure accurate current consumption in a short time, by the Miller integration by the time which is a integral multiple of one period, when measured current is periodically changed.
CONSTITUTION: The timer 7 produces the pulse output Tt with the start signal from the control section 9 and the output is fed to the analog switch 4 and FF6. The switch 4 is OFF during the pulse Tt, the integrating amplifier 2 starts the integrating operation, the integrating output is the difference of the average current between the inputs IX and IR in the designated time, and the comparator 5 detects the polarity by comparing the output of the amplifier 2 with the ground level to discriminate the amplitude of IX and IR. FF6 stores the output of the comparator. In this case, the pulse width of the output Tt is set to a integral multiple of the period t in which the measured current changes, enabling the discrimination of the propriety with excellent reproducibility independently of the start time of integration.
COPYRIGHT: (C)1980,JPO&Japio
JP2586779A 1979-03-06 1979-03-06 Measuring method of current consumption of liquid crystal display circuit Pending JPS55146051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2586779A JPS55146051A (en) 1979-03-06 1979-03-06 Measuring method of current consumption of liquid crystal display circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2586779A JPS55146051A (en) 1979-03-06 1979-03-06 Measuring method of current consumption of liquid crystal display circuit

Publications (1)

Publication Number Publication Date
JPS55146051A true JPS55146051A (en) 1980-11-14

Family

ID=12177736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2586779A Pending JPS55146051A (en) 1979-03-06 1979-03-06 Measuring method of current consumption of liquid crystal display circuit

Country Status (1)

Country Link
JP (1) JPS55146051A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6170778U (en) * 1984-10-15 1986-05-14
JPS61108972A (en) * 1984-11-01 1986-05-27 Sanyo Electric Co Ltd Current measuring circuit
JPS61116666A (en) * 1984-11-09 1986-06-04 Sanyo Electric Co Ltd Correction circuit for current measuring apparatus
JPS6189364U (en) * 1984-11-20 1986-06-11

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6170778U (en) * 1984-10-15 1986-05-14
JPS61108972A (en) * 1984-11-01 1986-05-27 Sanyo Electric Co Ltd Current measuring circuit
JPS61116666A (en) * 1984-11-09 1986-06-04 Sanyo Electric Co Ltd Correction circuit for current measuring apparatus
JPS6189364U (en) * 1984-11-20 1986-06-11
JPH0231102Y2 (en) * 1984-11-20 1990-08-22

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