EP0830982A2
Expired / Lapsed
EP
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Lighting circuit device for automobile
Assignee: Koito Manufacturing Co Ltd
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Filing: 1997-07-17
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Granted: —
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Expires: 2017-07-17
Abstract
Abstract A lighting circuit device of a discharge lamp for an automobile, has: a first circuit device for controlling lighting of the discharge lamp (9), the first circuit device including a microcomputer (3-8) and an IC (3-7); and a second circuit device which is electrically connected to the first circuit device. At least one of the microcomputer and the IC controls the lighting of the discharge lamp according to a signal indicating a current and voltage intended for the discharge lamp, and the microcomputer generates information for driving the second circuit device on receiving internal or external information on the first circuit device.
Inventors
- 👤 Yukihiko c/o Koito Manufacturing Co. Ltd. Endo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/06; B60Q1/08; B60Q1/10; B60Q1/115; B60Q1/12; B60Q1/122; B60Q1/14; B60Q11/00; B60S; B60S1/00; B60S1/02; B60S1/56; B60S1/60; B60S1/603; H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; B60Q2300/00; B60Q2300/10; B60Q2300/11; B60Q2300/112; B60Q2300/114; B60Q2300/13; B60Q2300/132; B60Q2300/134; B60Q2300/14; B60Q2300/142; B60Q2300/20; B60Q2300/21
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A lighting circuit device of a discharge lamp for
an automobile, comprising: a first circuit device for controlling lighting of
the discharge lamp, said first circuit device including a
microcomputer and an IC; and a second circuit device which is electrically
connected to said first circuit device, wherein at least one of said microcomputer and said
IC controls the lighting of the discharge lamp according to a
signal indicating a current and voltage intended for the
discharge lamp, and said microcomputer generates information
for driving said second circuit device on receiving internal
or external information on said first circuit device.
Claim 2
Dependent Claim
35 words
The lighting circuit device according to claim 1,
wherein said second circuit device includes a leveling device
for regulating light distribution and wherein the
microcomputer generates information on light distribution on
receiving the external information.
Claim 3
Dependent Claim
67 words
The lighting circuit device according to claim 1,
further comprising a third circuit device which is
electrically connected to said first circuit device, wherein
said third circuit device includes a cleaner device for
sending jets of cleaning liquid to a head lamp and wherein
said microcomputer generates information on a jet amount of
cleaning liquid for said cleaner device on receiving a
starting signal from an outside.
Claim 4
Dependent Claim
89 words
The lighting circuit device according to claim 1,
further comprising a fourth circuit device which is
electrically connected to said first circuit device, wherein
said fourth circuit device includes a cornering lamp device
for controlling an irradiation angle with respect to the
horizontal direction of a lighting apparatus such as a head
lamp during the traveling of an automobile on a curved road
and wherein said microcomputer generates control information
for the cornering lamp device on receiving information on
angular velocity, vehicle speed and the like from an outside.
Claim 5
Dependent Claim
25 words
The lighting circuit device according to claim 1,
wherein the information generated by said microcomputer is
sent via said IC to said second circuit device.
Claim 6
Dependent Claim
55 words
The lighting circuit device according to claim 1,
wherein said microcomputer is mainly used for low-speed
processing to control said lighting circuit device so as to
judge its optimum state and wherein said IC is mainly used
for high-speed processing such as a fail-safe operation to
determine whether or not the input information is
appropriate.
Claim 7
Dependent Claim
56 words
The lighting circuit device according to claim 1,
wherein said microcomputer effects optimum power control of
an illuminating lamp according to a signal indicating the
current and voltage to be applied to the illuminating lamp
and wherein said IC detects an abnormality of said lighting
circuit according to a signal from said microcomputer and
battery voltage.
Claim 8
Dependent Claim
39 words
The lighting circuit device according to claim 1,
wherein the external information intended for said
microcomputer is made to branch off to said IC in order to
detect an abnormality of sensors to which the external
information is supplied.
Claim 9
Dependent Claim
25 words
The lighting circuit device according to claim 1,
wherein trouble/abnormality diagnostic information or
trouble/abnormality foreseeing information is sent from said
first circuit device to outside.
Claim 10
Dependent Claim
15 words
The lighting circuit device according to claim
1, wherein the external information is input manually.
Claim 11
Dependent Claim
20 words
The lighting circuit device according to claim
1, wherein the external information includes a vehicle height
and a vehicle speed.
References Cited (Backward Citations)
JPH07186821A
Cited
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