Discharge lamp device having discharge lamp and circuit unit...

Details Discharge lamp device having discharge lamp and circuit unit... Discharge lamp device having discharge lamp and circuit unit...

2001-10-23

2004-04-27

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

With temperature modifier

For electrode within an envelope

C313S025000, C313S027000, C313S033000, C362S264000, C362S294000, C362S373000, C362S547000, C439S226000, C439S699100, C439S669000, C439S278000

Reexamination Certificate

active

06727636

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATION
This application is based on and incorporates herein by reference Japanese Patent Application No. 2000-339262 filed on Nov. 7, 2000.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a discharge lamp device having a discharge lamp and a circuit unit for applying a high voltage to the discharge lamp.
2. Description of Related Art
For example, a headlight device
100
of a vehicle shown in
FIG. 6
has been previously proposed as a discharge lamp device having a discharge lamp as a light source. The headlight device
100
includes a casing
101
that receives the discharge lamp
110
and a circuit unit
120
therein. The circuit unit
120
supplies a high voltage of about 20 kV to the discharge lamp
110
to light the discharge lamp
110
. The discharge lamp
110
and a circuit unit
120
are electrically connected together through a high voltage wire
125
.
In this arrangement where the discharge lamp
110
and the circuit unit
120
are connected together through the high voltage wire
125
, the high voltage wire
125
needs to be sealed in order to prevent generation of noises from the high voltage wire
125
. Furthermore, a high voltage connector
126
is required to connect the high voltage wire
125
to the discharge lamp
110
. This generally causes an increase in manufacturing cost.
In view of the above disadvantages, it is conceivable to directly connect the discharge lamp to the circuit unit to make an electrical connection therebetween without using the high voltage wire. In such a case where the discharge lamp and the circuit unit are directly connected together, the high voltage connector and the high voltage wire can be advantageously eliminated.
However, if the discharge lamp and the circuit unit are directly connected together, and thereby the circuit unit is positioned adjacent to the discharge lamp, heat generated from the discharge lamp and from the circuit unit causes a rise of temperature in the circuit unit. This may cause malfunctions of circuit elements in the circuit unit.
SUMMARY OF THE INVENTION
Thus, an objective of the present invention is to provide a discharge lamp device capable of preventing a circuit unit from getting a high temperature that causes malfunctions of the circuit unit, while eliminating a high voltage wire and a high voltage connector.
To achieve the objective of the present invention, there is provided a discharge lamp device including a discharge lamp, a circuit unit and a heat radiating member. The circuit unit is directly connected to the discharge lamp to apply a high voltage to the discharge lamp. The heat radiating member radiates heat generated from the discharge lamp and the circuit unit. The heat radiating member radially extends in at least one direction from one of the following: (I) a connection between the discharge lamp and the circuit unit; and (II) the circuit unit.


REFERENCES:
patent: 4733335 (1988-03-01), Serizawa et al.
patent: 5119275 (1992-06-01), Makita
patent: 2001/0014022 (2001-08-01), Frey et al.
patent: 3325197 (1985-01-01), None
patent: 19543852 (1997-05-01), None
patent: 1602171 (1981-11-01), None
patent: 63-96803 (1988-04-01), None
patent: 10-228804 (1998-08-01), None
patent: 11-203906 (1999-07-01), None

Affiliated with

Also associated with

Rating

Discharge lamp device having discharge lamp and circuit unit... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Discharge lamp device having discharge lamp and circuit unit..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discharge lamp device having discharge lamp and circuit unit... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3219559