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1. 发明专利

JP2000323100A FLAT LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY DEVICE USING IT 失效
公开(公告)号：JP2000323100A
公开(公告)日：2000-11-24
申请号：JP13539999
申请日：1999-05-17
申请人： HITACHI LTD
发明人： TSUCHIYA MASASHI , SHINADA SHINICHI , ARAI YOJI
IPC分类号： H01J61/54 , G02F1/1335 , G02F1/13357 , G09F9/00 , H01J61/30
摘要： PROBLEM TO BE SOLVED: To improve lighting delay after dark shelf and starting ability at low temperature and to provide a light source with high efficiency and uniform luminance, by providing an auxiliary electrode close to one of discharge electrode and ensuring distance between external guiding portions by forming an electrode on a luminescent region side in the L shape. SOLUTION: A pair of discharge electrodes 4, 5 are provided inside a front plate of an airtight container 1. An auxiliary electrode 6 is provided close to a corner of the discharge electrode 5 in a substantially L shape. The surfaces of the discharge electrodes 4, 5 and the auxiliary electrode 6 are coated with a conductive layer by thick film printing. For driving this flat-plate-type light source, for example, rectangular wave voltage is impressed on the electrode 4, and rectangular wave voltage having phase shifted by a half period is impressed on the electrode 5. Thus, discharge occurs in a discharge space, ultraviolet radiation occurring with discharge excites phosphor to emit light, and the light is radiated outside through the front plate. The auxiliary electrode 6 is connected to the discharge electrode 4 so as to remain same potential via a high resistance, and when the voltages are impressed on the discharge electrodes 4, 5, initially, micro discharge occurs between the discharge electrode 5 and the auxiliary electrode 6.

2. 发明专利

JP2000323093A FLAT PLATE TYPE LIGHT SOURCE 失效
公开(公告)号：JP2000323093A
公开(公告)日：2000-11-24
申请号：JP12673699
申请日：1999-05-07
申请人： HITACHI LTD
发明人： ARAI YOJI , SHINADA SHINICHI , MASAKI RYOICHI , TSUCHIYA MASASHI , IKUTA YASUSHI
IPC分类号： H01J61/30 , G02F1/1335 , G02F1/13357 , H01J61/54 , H01J65/00
摘要： PROBLEM TO BE SOLVED: To enable an easy discharge in a liquid crystal backlight flat plate type light source or the like even having a difficult-to-discharge state such as a state that it is left in a darkness for a long time. SOLUTION: This light source has a flat airtight vessel 1 configured by combining a translucent front plate 2 that is a light emitting face and a back plate 3 that is a shallow dish-shaped vessel; a pair of discharge electrodes 4, 5 parallel to each other provided on the inner face of the front plate 2 of the airtight vessel L an auxiliary electrode 6 provided near one of the discharge electrodes 4, 5, and an insulator layer 7 coating the surfaces of the respective electrodes 4, 5, 6. A microdischarge is generated between the discharge electrodes 4, 5 and the auxiliary electrode 6 at an early stage of supplying power to the respective electrodes 4, 5.

3. 发明专利

JP2000149869A FLAT PLATE TYPE LIGHT SOURCE, INFORMATION INSTRUMENT AND LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2000149869A
公开(公告)日：2000-05-30
申请号：JP31722698
申请日：1998-11-09
申请人： HITACHI LTD
发明人： SHINADA SHINICHI , ARAI YOJI , MASAKI RYOICHI , TSUCHIYA MASASHI , IKUTA YASUSHI
IPC分类号： H01J61/067 , G02F1/1335 , G02F1/13357 , H01J61/16 , H01J61/30 , H01J61/92
摘要： PROBLEM TO BE SOLVED: To provide a flat plate type light source having luminescence characteristics uninfluenced by a surrounding temperature, and having a high luminance, uniform luminous surface having a small luminous change from the starting time. SOLUTION: A front board 2 and a rear board 3, having translucency, are placed roughly in parallel to compose a hermetic container 1 having a discharge space with a flat section, and a first and a second discharge electrode 4, 5 are installed on the inside of the front board 2, and a dielectric layer 6 for covering the surfaces of the discharge electrodes 4, 5 is installed, and fluorescent material 7 is coated on the inside of the hermetic container 1, and mixed gas of argon and xenon is enclosed inside, the mixing ratio of xenon in the mixed gas of argon and xenon is set as 7% or more and simultaneously 38% or less.

4. 发明专利

JP2000011950A FLAT-TYPE LIGHT SOURCE 失效
公开(公告)号：JP2000011950A
公开(公告)日：2000-01-14
申请号：JP17233098
申请日：1998-06-19
申请人： HITACHI LTD
发明人： SHINADA SHINICHI , ARAI YOJI , IKUTA YASUSHI
IPC分类号： G02F1/1335 , G02F1/13357 , H01J61/067 , H01J61/30 , H01J65/00
摘要： PROBLEM TO BE SOLVED: To realize, in response to the demands for thinning and lightening a flat-type light source, the flat-type light source that can maintain a discharge current as in conventional cases, and has high luminance, high luminous effi ciency and a large operation margin. SOLUTION: A flat sealed container 1 is composed of a light transmissive front plate 3 and a rear plate 2. Then, a phosphor 4 is applied to the inside surface of the sealed container 1, a discharge gas such as a noble gas or mercury is enclosed in a discharge space 7, at least a pair of discharge electrodes 8, 9 formed by forming their surface shape into a curved or bent surface throughout its lengthwise direction are installed inside the facing side surfaces of the sealed container 1, and a dielectric layer is formed by covering the entire surface of each of the discharge electrodes 8, 9. As a result, since the surface areas of the discharge electrodes 8, 9 can be made large, a flat-type light source that can secure a discharge current as a conventional one, can implement a display without degrading luminance and luminous efficiency, and has an operation margin as stable as a conventional one as well and a long service life can be provided. The surface areas of the discharge electrodes 8, 9 can simply be adjusted by changing their bending angles.

5. 发明专利

JPH09210899A OPTICAL APPARATUS 失效
公开(公告)号：JPH09210899A
公开(公告)日：1997-08-15
申请号：JP1965896
申请日：1996-02-06
申请人： HITACHI LTD
发明人： ARAI YOJI
IPC分类号： G01N21/01 , G01N21/27 , G02B27/10
摘要： PROBLEM TO BE SOLVED: To enable parallel measurement by one optical apparatus by providing the apparatus with a structure taking out the light emitted from the constructed part of the discharge path of a deuterium lamp from the front and the rear. SOLUTION: A deuterium lamp 1 being a light source has a structure capable of taking out light in two directions and has light taking-out windows 2, 2' and, even if the light emitted from the discharge constricted part of the lamp 1 is taken out in two directions, respective quantities of light are almost equal. The lights emitted in two directions are condensed to incident slits 4, 4' by concave mirrors 3, 3' and spectrally diffracted by concave diffraction lattices 5, 5. The spectrally diffracted monochromatic light is divided into two lights by half mirrors 6, 6' and the respective lights pass through emitting slits 7, 7' to pass through sample analyzing cells 8, 8' to be incident on photodetectors 9, 9' composed of photodiodes and converted to electric signals. The reflected lights from the half mirrors 6, 6' are used as reference lights and incident on photodetectors 10, 10' to be converted to electric signals. By this constitution, a double beam optical system of two systems is obtained and a measuring time can be shortened.

6. 发明专利

JPH0864179A DEUTERIUM DISCHARGE LAMP 失效
公开(公告)号：JPH0864179A
公开(公告)日：1996-03-08
申请号：JP19511894
申请日：1994-08-19
申请人： HITACHI LTD
发明人： ARAI YOJI , YASUDA MAKOTO , KIMURA TAKESHI , ICHIKAWA MASAHIRO
IPC分类号： H01J61/68
摘要： PURPOSE: To decrease noise in a short wave length region with simple structure by making part of a light taking out part of a cylindrical discharge tube or a light radiating surface flat. CONSTITUTION: A light taking out window 4 in which part of a tube-shaped bulb is made flat is set in a discharge tube container 1 of a deuterium discharge tube. The bulb serving as the discharge tube container 1 is made of ultraviolet- ray transmitting glass, and the end is welded to a stem made of hard glass with coefficient of thermal expansion similar to the ultraviolet-ray transmitting glass to form a sealed container. Several hundreds Pa of deuterium is sealed in the bulb 1. A nickel partition 3 for shielding an electrode part is arranged in the central part of the bulb 1 to separate a cathode chamber from an anode chamber, electrodes and the metal partition are arranged, then a cathode 6 coated with a thermionic material 6 and an anode 7 made of molybdenum are faced on both sides of a discharge limiting small hole 9 of the partition plate 3.

7. 发明专利

JPH05251041A 失效
公开(公告)号：JPH05251041A
公开(公告)日：1993-09-28
申请号：JP4931692
申请日：1992-03-06
申请人： HITACHI LTD
发明人： ARAI YOJI , MATSUNO HIROMITSU , YASUDA MAKOTO , FUKUDA TAKESHI
IPC分类号： H01J9/04 , H01J61/06 , H01J61/68
摘要： PURPOSE:To obtain a heavy hydrogen discharge tube of a long service life and a high efficiency by covering a complex double coil with one sort of barium oxide, strontium oxide, and calcium oxide, and one sort of heat-resisting oxides, so as to form a cathode. CONSTITUTION:A complex element wire 22 is formed by winding the first metallic wire 20 with the second metallic wire 21 whose diameter is smaller than the first metallic wire. The element wire 22 is wound to form the primary coil 23, and furthermore, the coil 23 is wound to form the second coil 24, so as to produce a complex double coil. The resultant coil is covered with an electron radiating substance which consists of a compound of one sort of barium oxide, strontium oxide, and calcium oxide, and one sort of heat-resisting oxides, so as to form a cathode. The electron radiating substance is stable chemically and hardly reacted with a heavy hydrogen, and furthermore, hardly removed when it is entered in the complex double coil. As a result, a discharge tube of a long service life can be obtained.

8. 发明专利

JPH05217550A DEUTERIUM LAMP 失效
公开(公告)号：JPH05217550A
公开(公告)日：1993-08-27
申请号：JP1744992
申请日：1992-02-03
申请人： HITACHI LTD
发明人： FUKUDA TAKESHI , YASUDA MAKOTO , ARAI YOJI , MATSUNO HIROMITSU
IPC分类号： H01J61/09 , H01J61/68
摘要： PURPOSE:To obtain a deuterium lamp which possesses stable light output and has high efficiency and a long life by using an electrode applying a magnetic field directly before a cathode, in crossing at a right angle with the center axes of an electric discharge passage and a cathode coil. CONSTITUTION:Electric discharge is generated between a cathode 4 and an anode 5 through a slit 10 and a small hole 6. The ultraviolet ray generated by the waisted electric discharge through the small hole 6 is taken out from an ultraviolet ray transmission window 8. The cathode 4 is formed to an electrode applied with a magnetic field directly before the cathode, in crossing at right angle with the center axes of an electric discharge passage and a cathode coil by surrounding a composite triple coil coated with the electron radiating substance by a magnet surrounding 11. Accordingly, the electric discharge passage is lowered and also a cathode luminescent spot is lowered, and the luminescent spot is prevented from moving largely, and the electric discharge is stabilized, and the fluctuation of light is suppressed, and high efficiency and a long life can be achieved.

9. 发明专利

JPH05159749A HEAVY HYDROGEN DISCHARGE TUBE 失效
公开(公告)号：JPH05159749A
公开(公告)日：1993-06-25
申请号：JP31809691
申请日：1991-12-02
申请人： HITACHI LTD
发明人： ARAI YOJI , MATSUNO HIROMITSU , YASUDA MAKOTO , FUKUDA TAKESHI
IPC分类号： G01J3/10 , G01N21/01 , H01J61/09 , H01J61/68
摘要： PURPOSE:To decrease fluctuation of radiation brightness so as to improve S/N ratio by arranging a small hole for take-out light, respectively provided in an anode and an anode shield partition, coaxially with a bottleneck small hole. CONSTITUTION:A discharge is performed in such a manner that heavy hydrogen gas strongly emits light by a small hole 7 in a discharge bottleneck part, arranged between a cathode 3 and an anode 4, to radiate a continuous spectrum to an ultraviolet region taken out with radiation light from a light take-out window 9. Since a small hole 5 of the anode 4 and a small hole 8 of a shield partition 2 are arranged on an axial line of the small hole 7, cathode glow light generated in the vicinity of the cathode 3 is shielded by a partitioning plate 6 and not emitted to an anode side, so that brightness distribution of light radiated from the small hole 7 is symmetrical with the small hole 7 serving as the center. Thus, even when a cathode luminescent spot is moved, since the cathode glow light is not taken out simultaneously, stable light with a small fluctuation of radiation brightness can be obtained.

10. 发明专利

JPH0593752A LIGHTING APPARATUS FOR DEUTERIUM DISCHARGE TUBE 失效
公开(公告)号：JPH0593752A
公开(公告)日：1993-04-16
申请号：JP25350791
申请日：1991-10-01
申请人： HITACHI LTD
发明人： MATSUNO HIROMITSU , YASUDA MAKOTO , ARAI YOJI , FUKUDA TAKESHI , MURAYAMA SEIICHI , OISHI KONOSUKE
IPC分类号： G01R31/24 , H01J61/54 , H01J61/68
摘要： PURPOSE:To enable the forecasting and displaying of the life of a deuterium discharge tube by applying a voltage to a cathode coil making a part of a cathode to measure hourly change in current flowing through the cathode coil. CONSTITUTION:When a main power source switch of a lighting appratus of a deuterium discharge tube is turned ON, a voltage of a constant voltage power source 10 is applied to a cathode 3 (a compound double coil filled and coated with an electronic radiation substance) and a cathode heating current flows. At this point, as a switch S of a power source V to start a discharge is released. discharging does not start. The cathode heating current is detected with a resistance 11 to measure time with a time measuring device 12 until the current reaches about 120% of the normal state. Any data is ignored within a fixed time interval (e.g. 20ms) after the application of the voltage. The time measured as mentioned above is compared with the time (e.g. 220ms) preset by a time comparator 13. When the time measured is longer than the set time a life display lamp 14 is lit to display a point of time when about 80% of rated life expires.

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