JPS577732A - Lighting device for car dashboard - Google Patents

Lighting device for car dashboard

Info

Publication number
JPS577732A
JPS577732A JP8036680A JP8036680A JPS577732A JP S577732 A JPS577732 A JP S577732A JP 8036680 A JP8036680 A JP 8036680A JP 8036680 A JP8036680 A JP 8036680A JP S577732 A JPS577732 A JP S577732A
Authority
JP
Japan
Prior art keywords
luminous intensity
light switch
daytime
outputted
gate
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
JP8036680A
Other languages
Japanese (ja)
Other versions
JPS5950544B2 (en
Inventor
Shinji Watabe
Osamu Shimizu
Fumio Ueda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55080366A priority Critical patent/JPS5950544B2/en
Publication of JPS577732A publication Critical patent/JPS577732A/en
Publication of JPS5950544B2 publication Critical patent/JPS5950544B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
    • B60Q3/16—Circuits; Control arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/80—Circuits; Control arrangements
    • B60Q3/85—Circuits; Control arrangements for manual control of the light, e.g. of colour, orientation or intensity

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

PURPOSE:To operate the lighting means for liquid crystal indication even if a light switch is off during the running in the daytime by adopting the logic in regard to the opening and closing of an ignition switch and a light switch for the operational condition of a liquid crystal indication lighting device. CONSTITUTION:When an ignition switch 3 is on and a light switch 3 is off during the running in the daytime, the output of OR-gate 16 is in L-level, and a lighting signal (a) of H-level is outputted from an NAND-gate 17. As transistors 12 and 13 are continued to be on, current is supplied to an electric lamp 9 from an electric source 1, and an electric lamp 10 is lit by a fixed luminous intensity indicated by the lighting signal (a), that is, the maximum luminous intensity. On the other hand, oscillation pulses are inputted into a single-stable multivibrator 6 from a nonstable oscillator 5. When a volume adjuster 7 is operated to set the luminous intensity, pulses of a duty cycle with a pulse width corresponding to the increase and decrease of the set resistance are outputted from the multivibrator 6.
JP55080366A 1980-06-12 1980-06-12 Automotive instrument panel lighting system Expired JPS5950544B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55080366A JPS5950544B2 (en) 1980-06-12 1980-06-12 Automotive instrument panel lighting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55080366A JPS5950544B2 (en) 1980-06-12 1980-06-12 Automotive instrument panel lighting system

Publications (2)

Publication Number Publication Date
JPS577732A true JPS577732A (en) 1982-01-14
JPS5950544B2 JPS5950544B2 (en) 1984-12-08

Family

ID=13716257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55080366A Expired JPS5950544B2 (en) 1980-06-12 1980-06-12 Automotive instrument panel lighting system

Country Status (1)

Country Link
JP (1) JPS5950544B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112654U (en) * 1982-01-27 1983-08-01 三菱自動車工業株式会社 Vehicle display device
JPS59195436A (en) * 1983-04-20 1984-11-06 Niles Parts Co Ltd Vehicle illuminating lamp control device
JPS6181832A (en) * 1984-09-21 1986-04-25 Honda Motor Co Ltd Lighting device for car meter
JP2016025006A (en) * 2014-07-22 2016-02-08 トヨタ紡織株式会社 Driving circuit and in-vehicle lighting device using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551249U (en) * 1978-06-20 1980-01-07
JPS5544262U (en) * 1978-09-19 1980-03-22

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5360721A (en) * 1976-11-13 1978-05-31 Kubota Ltd Rubber valve seat for butterfly valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551249U (en) * 1978-06-20 1980-01-07
JPS5544262U (en) * 1978-09-19 1980-03-22

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112654U (en) * 1982-01-27 1983-08-01 三菱自動車工業株式会社 Vehicle display device
JPS59195436A (en) * 1983-04-20 1984-11-06 Niles Parts Co Ltd Vehicle illuminating lamp control device
JPS6181832A (en) * 1984-09-21 1986-04-25 Honda Motor Co Ltd Lighting device for car meter
JP2016025006A (en) * 2014-07-22 2016-02-08 トヨタ紡織株式会社 Driving circuit and in-vehicle lighting device using the same

Also Published As

Publication number Publication date
JPS5950544B2 (en) 1984-12-08

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