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Light-source device

A technology of a light source device and a luminous tube, which is applied in the direction of light sources, electric light sources, point light sources, etc., can solve problems such as short faults, displacement of discharge tube 99, capacitive coupling loss, etc., and achieve the effect of low manufacturing cost

Inactive Publication Date: 2012-03-28
IWASAKI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] but, Figure 10 The high-pressure discharge lamp 91 of (a) has the disadvantages that the UV enhancer 93 used as an auxiliary light source for starting blocks the light emitted from the discharge vessel 92, reduces the utilization efficiency of effective light, and produces uneven illuminance and shadows.
In addition, since the UV enhancer 93 has a structure in which one end side of the UV amplifier 99 formed of a ceramic material is supported by the lead-through conductor 100, if an impact is applied to the high-pressure discharge lamp 91 from the outside, the UV discharge tube 99 will be enlarged due to the impact. The amplitude shakes, and the lead-through conductor 100 is deformed under the motion load of the discharge lamp 99, the position of the discharge tube 99 is displaced, and the capacitive coupling with the power supply line 98 is lost and does not function as a UV source. The lead-through conductor 100 connected to the wire 97 may contact the other power supply wire 98 and cause a short fault

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 It is a figure which shows an example of the light source device of this invention, figure 2 is a perspective view of the auxiliary light source activated by the light source device, image 3 is an exploded view showing the structural components for activating the auxiliary light source, figure 1 The light source device includes: a high-pressure discharge lamp 1; a concave reflector 2 that reflects light emitted from the lamp 1; and an auxiliary starting light source 3 that generates ultraviolet rays that improve the starting performance of the lamp 1.

[0040] In the high-pressure discharge lamp 1, a pair of tungsten wire electrodes 6R and 6L are arranged facing each other with a short pitch of about 1 mm in the discharge vessel 5 formed in the center of the arc tube 4 made of quartz glass, and mercury and bromine are enclosed. Start-up gases such as halogen and argon, etc., hermetically seal the part from the discharge vessel 5 to both ends of the arc tu...

Embodiment 2

[0053] Figure 4 It is a cross-sectional view showing a modified example of the activation auxiliary light source. The activation auxiliary light source 30 shown in this figure is provided with a pipe portion 32 penetrating through the center of a ceramic airtight container 31 filled with a rare gas such as argon. The airtight container 31 is formed by a cone-shaped container body 33 and a pair of large and small opening covers 34R and 34L that close the openings at both ends of the container main body. Holes 35, 35 of the same diameter at the center of , 34L.

[0054] Such as Figure 4As shown in (a), with regard to starting the auxiliary light source 30, the airtight container 31 will be sealed with an opening cover 34R having the same size as the end face 10 of the electrode sealing portion 9L or greater than or equal to the size of the end face 10 of the electrode sealing portion 9L. The large-diameter part side of the electrode seal part 9L faces the end face 10, and th...

Embodiment 3

[0057] Figure 5 (a) is an exploded perspective view showing a modified example of starting the auxiliary light source, and this figure (b) is a cross-sectional view thereof. Regarding the starting auxiliary light source 36 shown in this figure, the container main body 38 of the double-layer cylinder structure and the inner cylinder 40 The other end of the other end is inserted into the hole 42 and the opening cover 41 that closes the opening of the other end side of the outer cylinder 39 constitutes an airtight container 37 made of ceramics filled with a rare gas such as argon. The main body 38 is integrated by connecting one end of the outer cylinder 39 and one end of the inner cylinder 40 to close one end of the outer cylinder 39, and the inner cylinder 40 provided to penetrate the center of the container main body 38 becomes figure 1 The tube portion of the electrode lead 8 protruding from the end surface 10 of the electrode sealing portion 9L is inserted therethrough.

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PUM

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Abstract

Provided is a startup-assist light source that has a simple structure, keeping the manufacturing cost down, and can easily and reliably be mounted at a location from which ultraviolet light can be efficiently emitted toward the discharge envelope of a high-pressure discharge lamp, said ultraviolet light improving the startup characteristics of the lamp without heating the lamp to a high temperature upon lighting. The startup-assist light source (3) has a translucent airtight envelope (18) filled with a noble gas, said envelope provided with a pipe section (19) going through said envelope. The pipe section (19) is mounted to an electrode lead (8) which goes through the pipe section and protrudes from the end surface (10) of an electrode sealing part (9L) fixed in a bottom hole (14) of a concave reflective mirror (2).

Description

technical field [0001] The present invention relates to a light source device used in a liquid crystal projector, a DLP projector, and the like. Background technique [0002] The light source devices of liquid crystal projectors and DLP projectors that require small and bright projected images use small, short-arc high-pressure mercury vapor lamps that can obtain high-brightness light as their light sources, but generally speaking, such lamps have coldness. The start-up performance of the cold condition (cold condition) and the start-up performance of the hot restrike (hot restrike) are not good, so the start-up auxiliary light source is set to improve the start-up performance. [0003] Figure 7 The conventional light source device shown is equipped with: a short-arc type high-pressure mercury vapor discharge lighting 51, and a discharge vessel 54 is formed at the center of an arc tube 52 formed by a quartz lamp tube. A pair of tungsten wire electrodes 56 and 56 are arrang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00H01J61/54H01J61/86F21Y101/00
CPCH01J9/247H01J61/54H01J61/86
Inventor 大河原亮加纳洋介
Owner IWASAKI ELECTRIC CO LTD
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