WO2015046458A1 - Dispositif à lampe à décharge - Google Patents

Dispositif à lampe à décharge Download PDF

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Publication number
WO2015046458A1
WO2015046458A1 PCT/JP2014/075700 JP2014075700W WO2015046458A1 WO 2015046458 A1 WO2015046458 A1 WO 2015046458A1 JP 2014075700 W JP2014075700 W JP 2014075700W WO 2015046458 A1 WO2015046458 A1 WO 2015046458A1
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WO
WIPO (PCT)
Prior art keywords
electromagnetic wave
discharge lamp
wave shielding
electromagnetic
lamp device
Prior art date
Application number
PCT/JP2014/075700
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English (en)
Japanese (ja)
Inventor
基 松永
耕生 玉木
正士 神藤
ヤン フサリク
マーティン クラル
Original Assignee
東京計器株式会社
株式会社プラズマアプリケーションズ
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Application filed by 東京計器株式会社, 株式会社プラズマアプリケーションズ filed Critical 東京計器株式会社
Publication of WO2015046458A1 publication Critical patent/WO2015046458A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit

Definitions

  • the present invention belongs to a discharge lamp device, and more particularly relates to an electromagnetic wave shielding unit surrounding the discharge lamp.
  • Patent Document 1 As an antenna excitation type microwave discharge lamp realizing high luminous efficiency and long life, the one shown in Patent Document 1 is known.
  • Microwaves contribute to the light emission phenomenon of discharge lamps, but some of them are radiated to the outside as electromagnetic waves. Since such leaked electromagnetic waves adversely affect other electronic devices, it is necessary to shield them to a certain amount or less.
  • a means for shielding leaked electromagnetic waves for example, as shown in Patent Document 2, a type of covering all discharge lamps with a mesh-like member is generally used.
  • the electromagnetic wave shielding mesh used in the conventional discharge lamp device has a fine mesh shape such as a square, and there is a problem that the emitted light of the discharge lamp is also shielded. Further, the conventional electromagnetic wave shielding mesh requires a ceiling portion to cover all the discharge lamps, and there is a problem that processing and forming the ceiling portion is complicated.
  • the present invention has been made in view of the above-described problems, and provides a discharge lamp device having an electromagnetic wave shielding part that shields electromagnetic wave leakage from a discharge lamp, has little shielding of radiated light, and does not require a ceiling part. This is the issue.
  • Another object of the present invention is to provide a discharge lamp device having an electromagnetic wave shielding unit having a function of shielding electromagnetic wave leakage and increasing the luminous flux of the discharge lamp.
  • an electromagnetic wave generating unit a discharge lamp that emits light by forming an electromagnetic field
  • a coaxial waveguide that guides the electromagnetic wave from the electromagnetic wave generating unit to the discharge lamp
  • an electromagnetic wave blocking unit that surrounds the discharge lamp
  • the electromagnetic wave shielding part is formed in a cylindrical shape by a plurality of conductive members extending in the axial direction of the coaxial waveguide, and the length of the part not including the discharge lamp of the electromagnetic wave shielding part is 4 of the wavelength of the electromagnetic wave.
  • the discharge lamp is preferably an antenna excited microwave discharge lamp.
  • the electromagnetic wave shielding unit may be installed such that the antenna axis of the antenna excitation type microwave discharge lamp and the axis of the electromagnetic wave shielding unit are in the same direction. preferable.
  • the electromagnetic wave shielding part may be formed in a cylindrical shape, and when F is the frequency of the electromagnetic wave and ⁇ is the diameter of the electromagnetic wave shielding part, F and ⁇ are: .705 ⁇ ⁇ 300 / F is preferably satisfied.
  • the opening ratio in the circumferential direction of the electromagnetic wave shielding portion may be 91% or less.
  • the relative permeability of the conductive member may be 1.1 or less.
  • the conductive member may be formed in a mirror shape.
  • the discharge lamp and the electromagnetic wave shielding unit may be installed inside the reflection mirror.
  • an electromagnetic wave shielding unit that shields electromagnetic wave leakage, has little shielding of radiated light, does not require a ceiling part, and can increase the luminous flux of a discharge lamp, and a discharge lamp device using the electromagnetic wave shielding unit are provided. can do.
  • FIG. 6 is a diagram showing a relationship between display colors of [FIGS. 6A] to [FIG. 6D] and electric field strength. It is the simulation figure calculated using the electromagnetic field simulator HFSS of ANSYS about the relationship between the length of the electromagnetic wave shielding part 50 concerning one embodiment of the present invention, and electromagnetic shielding characteristics, and shows the simulation result of TrialMesh4. is there.
  • FIG. 3 is a diagram illustrating a relationship between the light reflectance of the electromagnetic wave shielding unit and the intensity of light emitted from the electromagnetic wave shielding unit in one embodiment of the present invention, and shows an outline of the electromagnetic wave shielding unit to be calculated. It is a thing.
  • the relationship between the light reflectance of the electromagnetic wave shielding part and the intensity of light emitted from the electromagnetic wave shielding part in one embodiment of the present invention is calculated, and the set light source 920 is shown.
  • released outside from an electromagnetic wave shielding part is shown.
  • the electromagnetic wave shielding part 50 which concerns on one Embodiment of this invention.
  • the discharge lamp apparatus which has a reflective mirror which concerns on one Embodiment of this invention.
  • FIG. 1 is a schematic diagram of a discharge lamp device according to an embodiment of the present invention.
  • a discharge lamp device includes a discharge lamp 10 in which a discharge gas is sealed in an ellipsoidal discharge vessel 11, and a pair of antenna conductors 12 and 13 are provided. It is done. The front ends of the antenna conductors 12 and 13 are installed so as to project into the hollow portion in the discharge vessel 11, and the other ends are installed so as to project outside the discharge vessel 11. The antenna conductors 12 and 13 are held at predetermined intervals in the discharge vessel 11.
  • the launcher 20 is a coaxial waveguide in which an inner cylindrical member 21 and an outer cylindrical member 22 made of a conductive metal are coaxially fitted with a predetermined gap.
  • One antenna conductor 13 is fitted and connected to the inner cylindrical member 21 on one end side of the launcher 20.
  • the other end of the launcher 20 is connected to the microwave oscillation source 30 via a coaxial cable 40 as a microwave transmission path.
  • the microwave oscillated by the microwave oscillation source 30 propagates through the coaxial waveguide of the launcher 20 through the coaxial cable 40 and forms a strong microwave electric field in the gap portion of the antenna conductors 12 and 13. By this electric field, an arc-shaped plasma column is formed in the gap portion, and high luminance light emission is realized.
  • FIG. 2 is a diagram showing a simulation of electric field distribution when the discharge lamp 10 and the launcher 20 are installed in the center.
  • Microwaves contribute to the light emission phenomenon, but some of them are emitted to the outside as electromagnetic waves.
  • FIG. 2 it is considered that when the discharge lamp 10 is lit, an electromagnetic wave similar to a monopole antenna is emitted.
  • the discharge lamp 10 is installed in the coaxial direction of the launcher 20. Therefore, the emitted electromagnetic wave has an electric field component in the axial direction.
  • FIG. 3 is a perspective view of the electromagnetic wave shielding unit 50 of the discharge lamp device according to the embodiment of the present invention.
  • the electromagnetic wave shielding unit 50 is formed in a cylindrical shape by a plurality of axially conductive members 51 and surrounds the discharge lamp 10.
  • One end side of the electromagnetic wave shielding unit 50 includes a fixing unit 53 and is fixed around the discharge lamp 10.
  • the fixing portion 53 is connected to a grounded reflection mirror.
  • the other end side of the electromagnetic wave shielding part 50 becomes an open part 55 and may be provided with a reinforcing part 54.
  • the electromagnetic wave shielding unit 50 may include a circumferential conductive member 52.
  • the axially conductive member 51 mainly contributes to the shielding effect of leakage electromagnetic waves and the luminous flux increasing effect of the discharge lamp 10. Therefore, the circumferential conductive member 52 is mainly used as reinforcement for maintaining the mechanical strength of the electromagnetic wave shielding unit 50.
  • the embodiment of the present invention is not limited to this, and may be formed in a prismatic column or other columnar shape.
  • the widths of the conductive member 51 in the axial direction and the conductive member 52 in the circumferential direction shown in FIG. 3 may not be the same.
  • the width may be different between the conductive member 51 in the axial direction and the conductive member 52 in the circumferential direction.
  • variety may differ about some electroconductive members 51 of an axial direction.
  • FIG. 4 is a side view of the electromagnetic wave shielding unit 50 of the discharge lamp device according to the embodiment of the present invention.
  • the portion including the discharge lamp 10 of the electromagnetic wave shielding unit 50 is a coaxial tube structure A.
  • the conductive member 51 in the axial direction contributes to the electromagnetic wave shielding effect.
  • the circumferential conductive member 52 is orthogonal to the electric field vector radiated from the discharge lamp 10 and thus does not contribute to the shielding effect. Therefore, the conductive member 52 in the circumferential direction only needs to be installed in order to maintain the mechanical strength of the electromagnetic wave shielding unit 50. Therefore, the circumferentially conductive member 52 is configured with a smaller number than the electromagnetic wave shielding units used in the prior art. Is possible. This means that the aperture ratio of the electromagnetic wave blocking portion is improved while having an electromagnetic wave blocking effect, and thus it is possible to increase the amount of light emitted as compared with the discharge lamp device in the prior art.
  • the portion of the electromagnetic wave shielding unit 50 that does not include the discharge lamp 10 can be regarded as the circular waveguide structure B.
  • the cutoff frequency ⁇ c of the TE11 wave which is the dominant mode of the circular waveguide
  • the diameter ⁇ of the circular waveguide ⁇
  • the leaked electromagnetic wave is in the evanescent mode (attenuation mode) and cannot be emitted to the outside of the electromagnetic wave shielding unit 50.
  • the electromagnetic wave does not arrive at the end face of the open portion 55 of the electromagnetic wave shielding unit 50, so that it is not necessary to install a conductive member or the like, and an open shape can be taken.
  • the frequency of the microwave is 2.45 GHz
  • the wavelength of the microwave is about 122 mm. Therefore, when the diameter of the electromagnetic wave shielding unit 50 is set to about 71.55 mm or less, the evanescent mode is realized. Is possible.
  • the length of the circular waveguide structure B of the electromagnetic wave shielding unit 50 is proportional to the amount of attenuation, it is preferably at least one quarter of the wavelength of the microwave.
  • the notable point of the present invention is that the discharge lamp 10 is surrounded by the electromagnetic wave shielding unit 50 according to the embodiment of the present invention, so that the luminous flux of the discharge lamp 10 is increased as compared with the case where the electromagnetic wave shielding unit 50 is not installed. That is.
  • FIG. 5 is a graph showing the relationship between the emitted light intensity of the discharge lamp 10 and the presence / absence and diameter of the electromagnetic wave shielding unit 50.
  • the vertical axis in FIG. 5 represents the emitted light intensity (light flux [lm]) of the discharge lamp 10, and the horizontal axis represents the diameter [mm] of the electromagnetic wave shielding unit 50.
  • the part perpendicular to the vertical axis of the horizontal axis represents the case where the electromagnetic wave shielding unit 50 is not installed.
  • the frequency of the microwave is 2.45 GHz (constant)
  • the electromagnetic wave shielding part is composed of a copper wire having a diameter of 0.2 mm
  • the length of the electromagnetic wave shielding part is 90 mm
  • from the center of the copper wire adjacent in the circumferential direction to the center. was set at 2 mm.
  • the measurement of the radiated light intensity was performed so that a copper wire would not enter between the discharge lamp and the measuring device and become a shadow.
  • the luminous flux was about 3100 [lm].
  • the luminous flux changes from approximately 4500 [lm] to 4900 [lm], and the luminous flux is approximately compared to when the electromagnetic wave shielding unit 50 is not installed. It can be seen that there has been a 1.5-fold increase. This effect is presumed to be because the microwaves that were not consumed in the discharge formation of the discharge lamp 10 are confined in the electromagnetic wave shielding unit 50 and contribute to the discharge formation again.
  • FIG. 11 A specific example of the electromagnetic wave shielding unit of the discharge lamp device according to the embodiment of the present invention is shown in FIG.
  • the electromagnetic wave shielding part shown in FIG. 11 has a total length of 70 mm, a diameter of 22 mm, a fixing part on the lower side of the drawing, a reinforcing part on the upper side, and two conductive members in the circumferential direction.
  • the intervals between the fixed portion and the lower conductive member, between the two conductive members, and between the upper conductive member and the reinforcing portion are each 20 mm.
  • the thickness of the conductive member is 0.3 mm, and the interval between the conductive members in the axial direction is 2 mm.
  • a wide portion is provided in the depth direction of the drawing. This is a welded portion for forming an electromagnetic wave shielding portion manufactured in a planar shape into a cylindrical shape. Since this wide portion prevents light emission, the lower discharge lamp installation portion can be removed.
  • the discharge lamp device may have a structure in which an electromagnetic wave shielding unit 50 surrounding the discharge lamp 10 is installed inside the reflection mirror 60, as shown in FIG. .
  • the simulation 1 is calculated using the electromagnetic field simulator HFSS of ANSYS about the relationship between the structure of the electromagnetic wave shielding unit 50 and electromagnetic wave leakage.
  • a conventional electromagnetic wave leakage means for covering a metal mesh cylinder around a discharge lamp and a pattern in which the number of conductive members in the circumferential direction is mainly changed in the electromagnetic wave shielding unit according to the embodiment of the present invention were compared. .
  • the calculation procedure of HFSS is 1. 1. Calculate the antenna length at which the monopole set in space has maximum radiation at 2.45 GHz. A metal mesh was set around the antenna, and the time average distribution of the electric field vector in space was calculated. In the calculation, for a three-dimensional metal wire, a perfect conductor boundary condition was set for two-dimensional elements of a rectangle (longitudinal direction) and a ribbon (circumferential direction). The number of calculation iterations was 4 times, and the number of calculation elements was 60,000 to 300,000.
  • a metal mesh having a metal wire width of 0.2 mm, a circumferential metal wire interval of 1.53 mm, an axial metal wire interval of 1.59 mm, a cylinder diameter of 22 mm, and a cylinder length of 98.4 mm Set the cylinder.
  • the upper end of the metal mesh cylinder has an open shape.
  • a copper mesh cylinder was actually created with each of the above set values, attached to a discharge lamp, and measured with a simple electromagnetic leakage detector. The result was 1 mW / cm 2 or less at a distance of about 5 cm from the object. Therefore, the metal mesh cylinder (hereinafter referred to as “FullMesh”) having the above set value is used as a reference for the simulation 1.
  • FIG. 6a is a diagram showing the simulation result of FullMesh, in which the electric field strength of 0 to 10 V / m is represented by 19 color distribution (see FIG. 6 (e)).
  • a region 611 around the cylinder and a region 612 at the top of the cylinder indicate 9 to 10 V / m
  • an upper region 613 inside the cylinder indicates 0 to 2 V / m
  • the other region 614 indicates 3 to 6 V / m.
  • FIG. 6B shows a case where the circumferential metal wire interval is 3.84 mm (equivalent to 18 wires every 20 degrees), the axial metal wire interval is 10 mm, and the other conditions are the same as FullMesh (hereinafter, This is a simulation result of “TrialMesh1”.
  • the upper area 621 inside the cylinder shows 0 to 7 V / m, and the other area 622 shows 10 V / m. Therefore, in TrialMesh1, although the electromagnetic leakage suppression effect is recognized at the upper part of the cylinder, it can be said that the leakage is slightly larger than that of FullMesh.
  • FIG. 6c shows a case in which the circumferential metal wire spacing is 2.3 mm (corresponding to 30 per 12 degrees), the axial metal wire spacing is 10 mm, and the other conditions are the same as FullMesh (hereinafter, This is a simulation result of “TrialMesh2”.
  • An area 631 around the cylinder and an area 632 above the cylinder indicate 9 to 10 V / m, an upper area 633 inside the cylinder indicates 0 to 2 V / m, and the other area 634 indicates 3 to 6 V / m. Comparing FIG. 6a and FIG. 6c, it can be said that TrialMesh2 shows the same electromagnetic shielding characteristic as FullMesh.
  • FIG. 6d shows a case where the interval between the metal wires in the circumferential direction is 1.92 mm (corresponding to 36 lines every 10 degrees), the interval between the metal wires in the axial direction is 10 mm, and the other conditions are set to the same conditions as FullMesh (hereinafter, This is a simulation result of “TrialMesh3”.
  • An area 641 around the cylinder and an area 642 above the cylinder indicate 9 to 10 V / m
  • an upper area 643 inside the cylinder indicates 0 to 2 V / m
  • the other area 644 indicates 3 to 6 V / m. Comparing FIG. 6a and FIG. 6d, the distribution of electromagnetic wave leakage was almost the same in both cases, and it was confirmed that TrialMesh3 has an electromagnetic shielding characteristic equivalent to FullMesh.
  • FIG. 7a shows a simulation result when the cylinder length is 70.2 mm and the other conditions are the same as those of the TrialMesh3 (hereinafter referred to as “TrialMesh4”).
  • An area 711 around the cylinder and an area 712 above the cylinder indicate 9 to 10 V / m
  • an upper area 713 inside the cylinder indicates 0 to 2 V / m
  • the other area 714 indicates 3 to 6 V / m.
  • the upper region 713 inside the cylinder corresponds to a position of about 60 mm from the bottom surface of the cylinder.
  • FIG. 7b shows a simulation result when the cylinder length is 60.2 mm and the other conditions are the same as those of the TrialMesh3 (hereinafter referred to as “TrialMesh5”).
  • a region 721 in and around the cylinder indicates 9 to 10 V / m, and another region 724 indicates 0 to 8 V / m.
  • the frequency of the microwave in simulation 2 is 2.45 GHz, and the wavelength is about 122 mm. Then, as shown in FIG. 7b, it was confirmed that even when the cylinder length was 60.2 mm, which is about a half of the wavelength of the microwave, it had the same electromagnetic shielding characteristics as FullMesh. . Therefore, the simulation 2 shows that when the length of the electromagnetic wave blocking unit 50 is at least one-half of the wavelength, the electromagnetic wave blocking unit 50 has an effect of suppressing microwave leakage.
  • the length of the circular waveguide structure B of the electromagnetic wave shielding unit 50 excluding the length of the monopole antenna having a quarter wavelength from the length of the wavelength is at least a quarter of the wavelength, microwave leakage It has shown that there exists an effect which suppresses.
  • FIG. 8a is a model diagram used in the simulation 3 calculation.
  • a monopole antenna 811 with a calculation frequency of 2.45 GHz and a quarter-wavelength in the Z-axis direction from the origin is set up.
  • a cylindrical base 812 with a complete conductor is placed around it, and a line 813 is arranged around the outer periphery of the base 812.
  • the wave tube 814 is set to receive radio waves from the monopole antenna 811.
  • the opening of the waveguide 814 is 140 ⁇ 90 mm
  • the distance from the monopole antenna 811 to the waveguide 814 is 85 mm
  • the boundary (radiation boundary) 815 for obtaining the electromagnetic field distribution required for antenna pattern calculation is 200 mm
  • the length is long.
  • the thickness was 160 mm. Under the above conditions, the diameter ⁇ of the table 812, the number N of lines 813, and the line width W of the lines 813 were changed, and the characteristics were calculated.
  • the horizontal axis is the line width W of the line 813, and W is changed from 0.1 mm to 3.0 mm every 0.1 mm.
  • the vertical axis represents the shielding characteristic [dB].
  • the shielding characteristic is obtained by subtracting the waveguide receiving ability when the electromagnetic wave shielding unit is present from the waveguide receiving ability when the electromagnetic wave shielding unit is not present. The larger the numerical value, the better the shielding characteristics.
  • the number N of lines 813 was calculated for 6, 18, and 36 cases.
  • the shielding characteristic increases as the number N of the lines 813 increases. It turns out that becomes good. Further, since the shielding characteristic increases as the line width W of the line 813 increases, it can be seen that the shielding characteristic becomes better as the line width W of the line 813 increases. Furthermore, when the number N of the wires 813 and the line width W of the wires 813 are the same, the diameter ⁇ of the table 812 is higher in the order of shielding properties in the order of 18 mm, 22 mm, 30 mm, and 40 mm. It can be seen that the shielding properties are improved.
  • the values of the diameter ⁇ of the base 812, the number N of lines 813, and the line width W of the lines 813 are all parameters that determine the aperture ratio of the electromagnetic wave shielding unit. Therefore, according to the simulation 3 described above, the smaller the aperture ratio, the better the shielding characteristics. However, since there is a relationship that the light flux is reduced when the aperture ratio is reduced, the diameter ⁇ of the base 812, the number N of the lines 813, and the line are within the desired shielding characteristics and the range of the light flux. It is necessary to set a line width W value of 813.
  • TrialMesh2 (see FIG. 6c) of Simulation 1 showed an electromagnetic shielding characteristic equivalent to FullMesh.
  • the aperture ratio was calculated from the set value in TrialMesh2, it was about 91%.
  • the opening ratio of TrialMesh3 (see FIG. 6d), which has better electromagnetic shielding properties than TrialMesh2, was about 79%. Therefore, it was shown that an electromagnetic wave shielding part having a certain degree of electromagnetic shielding characteristics can be realized when the aperture ratio is 91% or more.
  • the simulation 4 is calculated using the electromagnetic field simulator HFSS of ANSYS about the relationship between the electrical conductivity and the relative magnetic permeability of the conductive member constituting the electromagnetic wave shielding unit and the electromagnetic wave leakage.
  • the conductive member 51 is made of a perfect conductor, silver, aluminum, and iron, and the diameter ⁇ of the base 812 is 22 mm, the number N of the wires 813 is 36, and the line width W of the wire 813 is 0.
  • the thickness was set to 2 mm, the frequency was changed from 2 GHz to 3 GHz, other conditions were set in the same manner as in Simulation 3, and the shielding characteristics were measured.
  • the conductivity [S / m] and relative permeability [ ⁇ / ⁇ o] of the perfect conductor, silver, aluminum and iron set in the simulation 4 are as shown in FIG. 9b.
  • the complete conductor (solid line), silver (long broken line), and aluminum (dotted line) show shielding characteristics of about 34 dB to about 40 dB at all simulated frequencies. Comparing the shielding characteristics of perfect conductor, silver and aluminum at the same frequency, it is recognized that the characteristics are good in this order, but the difference is within about 1 dB, and the shielding characteristics are almost equivalent. On the other hand, with respect to iron (broken line), the shielding characteristic changes from about 15 dB to about 20 dB, and the shielding characteristic is inferior to that of perfect conductor, silver, and aluminum.
  • the relative permeability of perfect conductor, silver and aluminum is 0.99998 to 1.00002, whereas the relative permeability of iron is 4000. This is thought to be due to the difference in magnetic permeability. Therefore, the conductive member in the embodiment of the present invention is desirable as the relative permeability is low, and it is considered that sufficient performance can be obtained if the relative permeability is 1.1 or less.
  • Simulation 5 is a calculation of the relationship between the light reflectance of the electromagnetic wave shielding unit and the intensity of light emitted from the electromagnetic wave shielding unit in one embodiment of the present invention.
  • FIG. 1 An outline of the electromagnetic wave shielding unit that is the object of calculation in simulation 5 is shown in FIG.
  • the total length of the electromagnetic wave shielding part is 70 mm
  • the length of the base part corresponding to the fixed part is 10 mm
  • the thickness of the conductive member is 0.3 mm
  • the interval between the conductive members is 2 mm
  • the width of a part of the conductive member was set to 0.2 mm.
  • Best Media “Lighting Simulator” CAD Ver1.1 was used for the numerical analysis.
  • FIG. 10 b shows the light source 920 set in the simulation 5.
  • the antennas 921 and 922 were each 10 mm, and the light source 923 between the antennas 921 and 922 was 5 mm long and 1 mm wide.
  • FIG. 10c is a table showing the results of simulation 5. As can be seen, when the light reflectivity of the electromagnetic wave shielding part is 0%, 68% of the light source is emitted. On the other hand, when the light reflectance of the electromagnetic wave shielding part was 70%, 90%, and 100%, 84.5%, 90%, and 92.9% of the light source were emitted, respectively. Therefore, it is desirable to use a member that improves the light reflectivity by forming the electromagnetic wave shielding unit in the embodiment of the present invention in a mirror shape.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

La présente invention concerne un dispositif à lampe d'éclairage, comprenant une lampe à décharge, un tube guide d'onde coaxial qui guide une onde électromagnétique vers la lampe à décharge, et un élément de blindage contre les ondes électromagnétiques entourant la lampe à décharge. Ledit élément de blindage contre les ondes électromagnétiques est conçu pour empêcher la fuite des ondes électromagnétiques tout en limitant le blocage de la lumière émise, il ne requiert pas d'élément de plafond et il est apte à accroître le rendement lumineux de la lampe à décharge. Ledit élément de blindage contre les ondes électromagnétiques (50) est configuré en une forme cylindrique par une pluralité d'éléments conducteurs (51) s'étendant dans le sens axial du tube guide d'onde coaxial. La longueur de la partie de l'élément de blindage contre les ondes électromagnétiques (50) qui ne contient pas la lampe à décharge (10) est supérieure ou égale au quart de la longueur d'onde des ondes électromagnétiques.
PCT/JP2014/075700 2013-09-27 2014-09-26 Dispositif à lampe à décharge WO2015046458A1 (fr)

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JP2013-200951 2013-09-27
JP2013200951A JP6200256B2 (ja) 2013-09-27 2013-09-27 放電ランプ装置

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WO2015046458A1 true WO2015046458A1 (fr) 2015-04-02

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KR101736364B1 (ko) * 2016-09-13 2017-05-18 알에프에이치아이씨 주식회사 반사판을 포함하는 무전극 조명장치
US9859107B1 (en) 2016-09-13 2018-01-02 Rfhic Corporation Electrodeless lighting system including reflector
KR102040922B1 (ko) * 2018-02-13 2019-11-05 김형석 동축 케이블형 플라즈마 램프 장치

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11135285A (ja) * 1997-10-28 1999-05-21 Matsushita Electric Works Ltd 無電極放電灯点灯装置
JP4714868B2 (ja) * 2005-10-20 2011-06-29 国立大学法人静岡大学 放電灯装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003022786A (ja) * 2001-07-09 2003-01-24 Matsushita Electric Works Ltd マイクロ波無電極放電灯装置
JP2009181735A (ja) * 2008-01-29 2009-08-13 Seiko Epson Corp 光源装置及びこれを備えたプロジェクタ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11135285A (ja) * 1997-10-28 1999-05-21 Matsushita Electric Works Ltd 無電極放電灯点灯装置
JP4714868B2 (ja) * 2005-10-20 2011-06-29 国立大学法人静岡大学 放電灯装置

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