Unlock instant, AI-driven research and patent intelligence for your innovation.

Discharge lamp illumining apparatus

一种点亮装置、放电灯的技术，应用在照明装置、电光源、电气元件等方向，能够解决妨碍点亮装置小型化、损耗、电压高等问题

Inactive Publication Date: 2009-04-22
MITSUBISHI ELECTRIC CORP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the two system circuits that work alternately have the same potential difference as the power supply voltage of the H-bridge inverter, in order to prevent the charging current of the capacitor working on the low voltage side from being too large, a current limiting device has to be used. Series resistance, not only the resistance will cause loss, but also the voltage applied to the resistance is high, so it is necessary to use a resistance with a high withstand voltage or connect multiple resistances in series, so there will be a problem that the lighting device will be hindered as the space increases. The subject of miniaturization
[0024] In addition, as in the case of the fifth conventional example, although the DC / AC inverter of the discharge lamp lighting device can also be constituted by using a transformer, the transformer is an electronic component whose characteristics are affected by the size, and it is necessary for the discharge lamp lighting device. Compared with the level shift circuit formed of semiconductors used in the first conventional example, or the bootstrap circuit formed of capacitors used in the second conventional example to achieve a space-saving and inexpensive circuit configuration , requires a larger space and higher cost, and has an undesirable problem as a circuit configuration of a discharge lamp lighting device for headlamps

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Discharge lamp illumining apparatus
  • Discharge lamp illumining apparatus
  • Discharge lamp illumining apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] FIG. 1 is a configuration circuit diagram of a discharge lamp lighting device according to Embodiment 1 of the present invention.

[0035] In FIG. 1, the discharge lamp lighting device is roughly divided into: a DC power supply 1, a first DC / DC converter 2, a second DC / DC converter 3, a first bootstrap circuit 4, and a second bootstrap circuit 5. , H-bridge inverter 6, igniter 7, discharge lamp 8 and control unit 9 constitute.

[0036] In the above configuration, the DC power supply 1 is, for example, a battery mounted on a vehicle.

[0037] The first DC / DC converter 2 of the first DC power supply unit converts the DC voltage from the DC power supply 1 into a first DC voltage V1 of a predetermined value through switching control by a control unit 9 described later.

[0038] Hereinafter, the first DC power supply unit is referred to as a first DC / DC converter 2 .

[0039] In addition, the first DC voltage V1 generated by the first DC / DC converter 2 is a positive (+) po...

Embodiment approach 2

[0093] Fig. 3 is a circuit diagram showing the configuration of a discharge lamp lighting device according to Embodiment 2 of the present invention.

[0094] In Fig. 3, the difference from Embodiment 1 is that the circuit for generating the third DC voltage V3 is configured by changing the transformer (32) used in Embodiment 1 into a choke coil (75), and using a diode (71), a diode (72) and the charge pump circuit of capacitor C3 (73) have the same configuration in other parts, so the description of the same configuration parts will be omitted.

[0095] As described in Embodiment 1, the second DC / DC converter 3 is a switching regulator of the chopping method, and the connection point between the choke coil (75) and the transistor (34) generates an amplitude corresponding to the second DC voltage V2 Approximate rectangular wave. Then, when the connection point is at "L" level, the capacitor 73 (C3) is charged with a voltage corresponding to the output voltage of the H bridge, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The capacitor (42(C1)) of a first bootstrap circuit (4) for sustaining in on state the first switching element (61) on one side, out of two switching elements arranged on the high potential side of a first DC voltage (V1), in on state is charged with a second DC voltage (V2) and further supplied with a charging current from a third DC voltage (V3) on the secondary winding (n2) side of a transformer (32). The first switching element (61) is sustained in on state for a long time by charging of the both DC voltages, and the polarity of a voltage applied to a discharge lamp (8) can be fixed to one side polarity close to DC output operation.

Description

technical field [0001] The present invention mainly relates to a discharge lamp lighting device suitable for lighting a mercury-free high-intensity discharge lamp. Background technique [0002] In vehicles in recent years, headlamps incorporating discharge lamps with high-intensity light sources that can provide a bright field of vision have become increasingly popular, and discharge lamp lighting devices for lighting headlamps incorporating such discharge lamps have been increasingly required to realize Miniaturization, high efficiency, and low cost, as well as the elimination of mercury, a constituent material of discharge lamps that are environmental pollutants, have also become a major issue. [0003] In a discharge lamp lighting device having these problems, a conventional discharge lamp (hereinafter referred to as "existing lamp") that encapsulates metal iodide (metal halide) such as sodium iodide or scandium iodide and mercury to emit light There are many examples of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H05B41/24
CPCH05B41/2828
Inventor 贯里康博大泽孝
Owner MITSUBISHI ELECTRIC CORP