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JPS57114737A - Illuminating device of meter for vehicle - Google Patents

Illuminating device of meter for vehicle

Info

Publication number
JPS57114737A
JPS57114737A JP56001049A JP104981A JPS57114737A JP S57114737 A JPS57114737 A JP S57114737A JP 56001049 A JP56001049 A JP 56001049A JP 104981 A JP104981 A JP 104981A JP S57114737 A JPS57114737 A JP S57114737A
Authority
JP
Japan
Prior art keywords
output
time
driver
meter
darkness
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
JP56001049A
Other languages
Japanese (ja)
Inventor
Masao Ishikawa
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP56001049A priority Critical patent/JPS57114737A/en
Publication of JPS57114737A publication Critical patent/JPS57114737A/en
Pending legal-status Critical Current

Links

Landscapes

  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

PURPOSE: To compensate a darkness responsive process of the driver even though the driver encounters rapid darkness, by increasing brightness of a meter display panel when a rate of illuminance change in a running environment exceeds a prescribed value.
CONSTITUTION: When a vehicle goes into a tunnel at time t1, voltage Vs of an illuminance sensor 11 lowers to change an output Vg of a function generator 12 and obtain a required output for night illumination. At this time, an output Va of a differentiating circuit 13 is compared with reference voltage Vp by a comparator 14, and this output Vb passes through a CR charge-discharge circuit and amplifier 15 to become a waveform output Vd. This output Vd and Vg are added by an adder 16 to become a waveform output Ve and drive an illuminating lamp 8 through a transistor 17. Accordingly, high intensified illumination corresponding to a drakness responsive process of sight for the driver is obtained from the time t1 to t3 to always provided a state easy to see a meter.
COPYRIGHT: (C)1982,JPO&Japio
JP56001049A 1981-01-09 1981-01-09 Illuminating device of meter for vehicle Pending JPS57114737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56001049A JPS57114737A (en) 1981-01-09 1981-01-09 Illuminating device of meter for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56001049A JPS57114737A (en) 1981-01-09 1981-01-09 Illuminating device of meter for vehicle

Publications (1)

Publication Number Publication Date
JPS57114737A true JPS57114737A (en) 1982-07-16

Family

ID=11490688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56001049A Pending JPS57114737A (en) 1981-01-09 1981-01-09 Illuminating device of meter for vehicle

Country Status (1)

Country Link
JP (1) JPS57114737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942738U (en) * 1982-09-13 1984-03-21 日産自動車株式会社 Dimmer device for vehicle display lighting equipment
FR2875453A1 (en) * 2004-09-22 2006-03-24 Dav Sa LIGHTING DEVICE FOR MOTOR VEHICLE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942738U (en) * 1982-09-13 1984-03-21 日産自動車株式会社 Dimmer device for vehicle display lighting equipment
FR2875453A1 (en) * 2004-09-22 2006-03-24 Dav Sa LIGHTING DEVICE FOR MOTOR VEHICLE
WO2006032605A1 (en) * 2004-09-22 2006-03-30 Dav Lighting device for motor vehicle

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