公开(公告)号：JP2002075039A

公开(公告)日：2002-03-15

申请号：JP2000256721

申请日：2000-08-28

Applicant: USHIO ELECTRIC INC

Inventor： HORIKAWA YOSHIHIRO

IPC: F21V15/00 ,  F21V7/22 ,  F21V15/02 ,  F21V25/00 ,  F21V29/00 ,  F21V29/505 ,  F21Y101/00 ,  F21V7/20

Abstract: PROBLEM TO BE SOLVED: To provide a reflector for a high-pressure discharge lamp equipment where the reflector is not broken at breakage of the lamp while splash of lamp fragments is effectively prevented in the case of breakage. SOLUTION: The reflector for the high-pressure discharge lamp equipment is provided where a short arc type discharge lamp 1 where a mercury of at least 0.15 mg/mm3 is sealed in a discharge vessel 101 is provided in a glass reflector 3. The outside surface of the glass reflector 3 is coated with a metal member 5.

公开(公告)号：JPH11297271A

公开(公告)日：1999-10-29

申请号：JP11009198

申请日：1998-04-07

Applicant: USHIO ELECTRIC INC

Inventor： MORIMOTO YUKIHIRO ,  KOMIYA MASANOBU ,  HORIKAWA YOSHIHIRO ,  SHINOHARA AKIKO

IPC: H01J61/36

Abstract: PROBLEM TO BE SOLVED: To prevent a crack of the welding outside end part, endure gas pressure when a lamp is lighted, and improve fracture toughness of the projecting part by putting a welding outside end part diameter and the molybdenum concentration of an almost columnar blocking-up part structure of an inclining functional member having one end side rich in molybdenum and the other end side rich in silica, in the specific relationship. SOLUTION: The relationship of M=0.38 D -4.6 D+23 when a diameter D mm is 1.4 to 6 mm and 8.8 wt.% when the diameter is not less than 6 mm, is imparted during the molebdenum concentration wt.% of an inclining functional material with the diameter D mm of a blocking-up part structure 50 as a parameter to increase fracture toughness. The blocking-up part structure 50 endures lamp gas pressure more when the lamp is lighted as the welding part F becomes longer and the fracture toughness of the blocking-up structure 50 projecting from the blocking-up part 12 is improved. However, when the welding part F is lengthened, the molybdenum concentration of the welding outside end part E containing molybdenum increases, so that a crack is easily formed here after welding. However, when it approaches a non-cracking critical line, the welding part F can be lengthened to that extent.

公开(公告)号：JPH10134775A

公开(公告)日：1998-05-22

申请号：JP30412796

申请日：1996-10-31

Applicant: USHIO ELECTRIC INC

Inventor： NARITA MITSUO ,  SUGITANI AKIHIKO ,  HORIKAWA YOSHIHIRO ,  ITO TAKASHI ,  IGARASHI RYUSHI

IPC: H01J61/073 ,  H01J61/12 ,  H01J61/30 ,  H01J61/82 ,  H01J61/86 ,  H01J61/88

Abstract: PROBLEM TO BE SOLVED: To provide a metal halide lamp capable of good lighting without cracking at a sealing part with respect to a small lamp in which a distance between electrodes is smaller than 3.0mm and without difficulty in lamp manufacture. SOLUTION: This lamp of direct current lighting type in which a distance between electrodes X is 2.9mm or less, and a cathode 11 and an anode 12 are disposed at a luminescent tube 10 made of quartz glass, mercury and metal halide are sealed in this luminescent tube 10, the lamp is lit in the range of 100 to 400W in rated power, and a ratio D/H between a height H of a cathode 11 extending in a discharge space and a maximum inner diameter D in a direction orthogonal to an electrode axis direction in a discharge space is 1.9 or more.

公开(公告)号：JP2001126662A

公开(公告)日：2001-05-11

申请号：JP30033499

申请日：1999-10-22

Applicant: USHIO ELECTRIC INC

Inventor： TSUKAMOTO TAKUYA ,  KITANO HIROYOSHI ,  KOMIYA MASANOBU ,  HORIKAWA YOSHIHIRO

IPC: H01J61/36

Abstract: PROBLEM TO BE SOLVED: To provide a short arc type extra-high pressure discharge lamp in which the mercury immediately evaporated from the welded part space at the start-up may rapidly move into the light-emitting space, the arc at the start-up is rapidly stabilized, there is no risk of lighting failure of lamp damage, and also the eccentricity of the electrode is eliminated. SOLUTION: The base part 20a of the electrode is provided with a path consisting of a groove 21 or slit 22 connecting the welded part space S2 and discharge space S1, so that the mercury immediately evaporated from the welded part space may rapidly move into the light emitting space. A thin metal film is grasped by a slit 22 communicating with the welded part space to eliminate the eccentricity of the electrode.

公开(公告)号：JP2001118542A

公开(公告)日：2001-04-27

申请号：JP29533599

申请日：1999-10-18

Applicant: USHIO ELECTRIC INC

Inventor： KOMIYA MASANOBU ,  HORIKAWA YOSHIHIRO

IPC: H01J61/073 ,  H01J61/20 ,  H01J61/36 ,  H01J61/86

Abstract: PROBLEM TO BE SOLVED: To provide a short arc-type high-pressure mercury lamp, having a sufficient pressure resistance not to generate cracks in an auxiliary glass tube, which thus correctly maintains the positions of the electrodes and accordingly stabilizes the operational characteristics. SOLUTION: A short arc-type high-pressure mercury lamp includes a discharge lamp of quartz glass with a light-emitting tube part and sealing tube part, a pair of electrodes oppositely arranged in the light-emitting tube part facing each other with a gap of 3.0 mm or less between them, and the light- emitting tube part is filled with mercury of 0.15 mg/mm3 or higher, and at least one of the electrodes has a base inserted in a through-hole of an auxiliary glass tube fusing with the sealing tube part, wherein a coil member is fixedly arranged in the inside of the through-hole to hold the base.

公开(公告)号：JPH11312492A

公开(公告)日：1999-11-09

申请号：JP11901298

申请日：1998-04-28

Applicant: USHIO ELECTRIC INC

Inventor： SATO HIROTO ,  ITO TAKASHI ,  HORIKAWA YOSHIHIRO ,  KOMIYA MASANOBU ,  SUGITANI AKIHIKO

IPC: H01J61/36

Abstract: PROBLEM TO BE SOLVED: To provide a discharge lamp that can prevent the breakage of a closing body by eliminating or decreasing the outside release of evaporated substance from the sealing body formed from a functionally gradient material. SOLUTION: This discharge lamp is provided with a bulb 10 having an arc tube part 11 and sealing tube parts 12 continuously connected to both ends, and cylindrical closing bodies 20 arranged in the sealing tube parts 12 of the bulb 10, and the stopper 20 each are formed from a functionally gradient material having an insulating part 21 at its inner end side and an conductive part 22 at its other end side, and a sealing structure is formed by welding each of the sealing tube parts 12 of the bulb 10 to the insulating part 21 of the stopper 20. In this case, a sleeve part 13 having an inside diameter larger than the outside diameter of the stopper 20 is so formed at the outer end of each of the sealing tube parts 12 of the bulb 10 as to extend outward in the axial direction.

公开(公告)号：JPH11297269A

公开(公告)日：1999-10-29

申请号：JP11131798

申请日：1998-04-08

Applicant: USHIO ELECTRIC INC

Inventor： SUGITANI AKIHIKO ,  SATO HIROTO ,  ITO TAKASHI ,  HORIKAWA YOSHIHIRO

IPC: H01J61/20 ,  H01J61/82 ,  H01J61/88

Abstract: PROBLEM TO BE SOLVED: To satisfactorily stabilize the ark during lighting in a high-pressure mercury lamp having an extremely high mercury vapor pressure and also an extremely high tube wall load. SOLUTION: A pair of tungsten electrodes 4 is arranged opposite to each other in a discharge vessel 2 consisting of quartz glass, 0.16 mg/mm or more of mercury and a rare gas are sealed in the discharge vessel 2. The tube wall loads is 0.8 W/cm or more. A metal halide having an ionization voltage 0.87 times or less the ionization voltage of mercury is added to the discharge vessel 2 within the range of 2×10 -7×10 μmol/mm .

公开(公告)号：JPH11297268A

公开(公告)日：1999-10-29

申请号：JP11131698

申请日：1998-04-08

Applicant: USHIO ELECTRIC INC

Inventor： SUGITANI AKIHIKO ,  SATO HIROTO ,  ITO TAKASHI ,  HORIKAWA YOSHIHIRO

IPC: H01J61/20 ,  H01J61/12 ,  H01J61/30 ,  H01J61/82 ,  H01J61/88

Abstract: PROBLEM TO BE SOLVED: To provide a high-pressure mercury lamp capable of satisfactorily preventing the clouding of the quartz glass constituting a discharge vessel and its development to prevent a sudden reduction in screen illumination in the use as a light source for liquid crystal projector. SOLUTION: This high-pressure mercury lamp 1 comprises a discharge vessel 2 consisting of quartz glass, a pair of tungsten electrodes 4 arranged opposite to each other in the discharge vessel 2, and 0.16 mg/mm or more of mercury, a rare gas, and a halogen sealed in the discharge lamp 2, and its tube wall load is 0.8 W/cm or more. In this lamp 1, the sealing quantity of the halogen is set within the range of 2×10 -7×10 μmol/mm .