JPH03173058A - Discharge lamp device - Google Patents

Abstract

PURPOSE:To prevent the generation of unevenness of the color temperature and the discharge luminous flux number in a discharge lamp lighting time by connecting a discharge lamp and a lighting circuit in an inseparable condition. CONSTITUTION:A discharge lamp 1 consists of a valve 2 and a holder 3, while a lighting circuit 13 consists of ballasts 16 and ignitors 17 provided in box bodies 14 and 15 separately respectively. And cords 26, 24, and 28 are used to connect between the discharge lamp 1, the ballasts 16, and the ignitors 17, and they are made inseparable. As a result, there is no connector to generate a voltage variation, and the conformity between the discharge lamp and the lighting circuit is never disturbed. Consequently, a lighting of a stable discharge luminous flux member and a stable color temperature can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION The discharge lamp device of the present invention will be described in detail according to the following items.

A, II Industrial field of application B8 Summary of the invention C1 Prior art Problems to be solved by the invention E1 Means for solving the problems F, Examples [Figs. 1 to 4] F-1. Embodiment 1 [Figs. 1 and 2] a, Discharge lamp b1 Lighting circuit C0 Effect F-2, Second embodiment [Figs. 3 and 4 G1 Effect of the invention (A, Industrial Field of Application) The present invention relates to a novel discharge lamp device. In detail, in a discharge lamp device equipped with a discharge lamp and a lighting circuit,
It is an object of the present invention to provide a novel discharge lamp device that prevents variations in color temperature, number of emitted light beams, etc. when lighting a discharge lamp due to changes in voltage or mismatch between the discharge lamp and the lighting circuit.

(B. Summary of the Invention) The discharge lamp device of the present invention connects the discharge lamp and the lighting circuit in an inseparable manner so that the discharge lamp and the lighting circuit are always treated as a pair. In addition, there is no voltage change at the connector used when the discharge lamp is separable, and therefore, variations in color temperature and number of emitted light fluxes when the discharge lamp is lit are prevented. Ru.

(C. Prior Art) The use of discharge lamps, for example meral halide discharge lamps, as a light source for automobile headlamps has been proposed.

In order to light a discharge lamp, a lighting circuit that applies a discharge voltage to the discharge lamp is required, and the discharge lamp and the lighting circuit are usually connected via a standardized connector. Additionally, even when the ballast and igniter of the lighting circuit are installed in separate housings, the ballast and igniter are usually connected via a connector. It is.

(D. Problem to be Solved by the Invention) By the way, if the discharge lamp and the lighting circuit or the ballast and the starter are connected by a connector, the voltage will increase due to the difference in contact resistance at the connector part. There is a problem in that the color temperature and the number of emitted light fluxes vary when the discharge lamp is turned on.

In addition, the relationship between the discharge lamp and the lighting circuit must be compatible in terms of characteristics, but if the discharge lamp and the lighting circuit are connected with a connector, there will be a lighting circuit that is not compatible with the characteristics of the discharge lamp. Sometimes they are combined, and this also causes a problem of variations in color temperature and number of emitted light fluxes when the discharge lamp is turned on.

(E. Means for Solving the Problems) Therefore, in the discharge lamp device of the present invention, the discharge lamp and the lighting circuit are connected in an inseparable manner.

Therefore, in the discharge lamp device of the present invention, since no connector is interposed between the discharge lamp and the lighting circuit, there is no voltage change at the connector part, and the discharge lamp and lighting circuit are not compatible with each other. There is no storage, and it is possible to prevent variations in the color temperature and the number of emitted light fluxes when the discharge lamp is turned on.

(F. Embodiment) [FIGS. 1 to 4] The discharge lamp device of the present invention will be described in detail below according to each illustrated embodiment.

(F-1, First Embodiment) [Figures 1 and 2] Figures 1 and 2 show a first embodiment of the discharge lamp device of the present invention.

(a, Discharge Lamp) 1 is a discharge lamp, which consists of a bulb 2 and a holder 3.

Reference numeral 4 designates a glass bulb of the bulb 2, which is formed integrally with an elliptical spherical discharge portion 5 and pinch seal portions 6.6 protruding from both ends of the discharge portion 5 in mutually opposite directions.

A metal foil 7.7 is embedded in the pinch seal portion 6.6.

Reference numeral 8.8 designates an electrode rod, one end of which protrudes into both ends of the internal space of the discharge section 5, and the other end of which is individually embedded in the pinch seal portion 6.6, and is covered with metal foil 7.8. 7 are connected to each other separately. The ends 8a, 8a of one end protruding into the discharge section 5 serve as discharge electrodes.

9.9 is a lead wire, one end of which is connected to the pinch seal portion 6.
6 and connected to the metal foil 7.7, the other end protruding from the outer end surface of the pinch seal portion 6.6.

Holder 3 includes an insulating base 10 and two lead supports 1
1.12.

The lead support 11.12 has a proximal portion buried in the insulating base 10, and a tip portion 11a protruding forward;
Lead wires 9.9 of valve 2 are connected to 12a separately,
Portions jlb and 12b protruding from the rear surface of the insulating base 10
is considered a connection terminal.

(b, lighting circuit) 13 is a lighting circuit section, each of which has a separate housing 14.15
It consists of a ballast 16 and an igniter 17 provided inside.

FIG. 2 is a block diagram showing an example 13 of the lighting circuit.

The ballast 16 consists of a DC boost circuit 18, a DC-AC push-pull inverter circuit 19, and a control circuit 20, and the starter 17 consists of an LC load and igniter circuit 21 and an igniter starting circuit 22.

The DC booster circuit 18 includes input terminals 23a and 23b connected to the output terminal of a battery (not shown), and the DC-AC push-pull inverter circuit 19 has its input terminal connected to the output terminal of the DC booster circuit 18. It is provided to convert the DC voltage from the DC booster circuit 18 into a sinusoidal AC voltage. In addition, the control circuit 20
is a circuit provided for detecting the extinguishing time of the discharge lamp 1, etc., and controlling the boost amount of the DC booster circuit 18 according to the detection result.

The input terminal of the LC load and igniter circuit 21 is code 2.
DC-AC push-pull inverter circuit 19 through 4
is connected to the output terminal of In addition, the output terminal 25
a, 25b are connected to the connection terminals 11b, 12b of the discharge lamp 1 via a cord 26. Igniter starting circuit 2
Reference numeral 2 includes a circuit that sends a starting signal to the LC load and igniter circuit 21 and detects the lamp current.

27 is a connector, which is connected to input terminals 23a and 23b of the DC booster circuit 18 by a cord 28, and
Another connector (not shown) connected to the battery is connected to the connector 27.

(c. Effect) In the discharge lamp device described above, the cord 26 is connected between the discharge lamp l, the ballast 16, and the starter 17.
．． Since they are connected by 24 and 28, they cannot be separated.

Therefore, there is no connector that causes a voltage change, and the compatibility between the discharge lamp and the lighting circuit is not impaired, and lighting can be performed with a stable number of emitted light fluxes and a stable color temperature.

(F-2, Second Embodiment) [Figures 3 and 4] Figures 3 and 4 show a second embodiment of the discharge lamp device of the present invention.

A holder 29 supports the bulb 2, and a cylindrical cover portion 30 is attached from the rear surface of the insulating base 10 of the holder 29.
are integrally protruded.

Reference numeral 31 denotes a lighting circuit unit in which a ballast and a starter are integrated, and is fitted and fixed inside the cover part 30, and its output terminals 25a and 25b are connected to the connection terminals 11b and 12b of the lead support 11.12. Each is connected separately.

A receiving recess 32 whose rear end is limited by the rear end surface of the lighting circuit section 31 and is open toward the rear is formed in the rear part of the cover part 30, and a terminal piece is inserted into the receiving recess 32. 33a and 33b are arranged. The base ends of these terminal pieces 33 a and 33 b are supported by the casing of the lighting circuit section 31 and are connected to the input terminals 23 a and 23 b of the lighting circuit 13, respectively. As a result, the rear end portion of the cover portion 30 serves as a connector portion, into which a connector (not shown) connected to the battery is inserted, thereby connecting the lighting circuit 13 to the battery.

In addition, in this second embodiment, since the discharge lamp l and the lighting circuit 13 are integrally configured and there is no cord through which high-voltage alternating current flows, noise radiated from the cord is not generated. This has the advantage that there is no risk of affecting other electronic devices.

(G. Effect of the invention) As is clear from the above description, the discharge lamp device of the present invention is a discharge lamp device that includes a discharge lamp and a lighting circuit, and the discharge lamp and the lighting circuit cannot be separated. It is characterized by being connected in the state of.

Therefore, in the discharge lamp device of the present invention, since no connector is interposed between the discharge lamp and the lighting circuit, there is no voltage change at the connector part, and the discharge lamp and lighting circuit are not compatible with each other. There is no storage, and it is possible to prevent variations in the color temperature and the number of emitted light fluxes when the discharge lamp is turned on.

The specific shapes, structures, and configurations shown in each of the above embodiments are merely examples of implementing the discharge lamp device of the present invention, and the technical scope of the present invention is not limited by these. shall not be construed as such.

2 is a block diagram schematically showing the connection state, FIGS. 3 and 4 show a second embodiment of the discharge lamp device of the present invention, and FIG. 3 is a partially cutaway side view. FIG. 4 is a block diagram schematically showing the connection state.

Explanation of symbols 1... Discharge lamp, 13... Lighting circuit ratio application Man Koito Manufacturing Co., Ltd.

[Brief explanation of the drawing]

Claims (1)

[Claims] A discharge lamp device comprising a discharge lamp and a lighting circuit, characterized in that the discharge lamp and the lighting circuit are connected in an inseparable manner.