JP2010123496A - High-pressure discharge lamp, and lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-pressure discharge lamp and a lighting apparatus excellent in luminescent characteristics such as color rendering properties, a red color rendering index R9 in particular. <P>SOLUTION: The high-pressure discharge lamp L1 as well as the lighting apparatus 9 includes an arc tube 4 in which a discharge medium having a luminescent material and a noble gas is filled in an airtight vessel 21 and which emits light with a color temperature of 3,600-4,200K, color deviation duv of -0.002 to +0.004, and an average color rendering index Ra of not less than 85, and an enclosure 1 surrounding the arc tube 4, and a visible light absorbing-selective luminescent organic compound coat 6 formed so as to emit light with a color temperature of 3,200-3,700K, color deviation duv of -0.003 to -0.010, and an average color rendering index Ra of not less than 88 while having an absorption peak at 550-600 nm and luminescence at 600 nm or higher is provided on the surface of the enclosure 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a high-pressure discharge lamp such as a multi-tube metal halide lamp with improved light emission characteristics, and an illumination device.

  High-pressure discharge lamps are widely used as lighting sources for stores, factories, halls, sports facilities, etc. as a light source with high efficiency, high color rendering properties and long life.

  And most high-pressure discharge lamps used for illumination of exhibition products in the above stores have a color temperature of 3700 to 4200 K and a relatively high average color rendering index Ra, but a red color rendering index R9 of around 60 to 70. The red color of food and clothing is poor and unsuitable for lighting these products.

  Therefore, a filter film made of a light interference film or the like is formed on the surface of the outer tube surrounding the arc tube or arc tube to reduce the light output on the short wavelength side in the visible light region and lower the color temperature, but the average color rendering A high pressure discharge lamp has been developed that improves the appearance of red so as to increase the red color rendering index R9 while maintaining or increasing the evaluation number Ra.

  However, this high-pressure discharge lamp has a filter film formed on the surface of an arc tube using quartz glass in a multi-tube structure. There was a problem that the deterioration of the light emission characteristics occurred quickly due to early deterioration and the film formation operation had to be performed at a high temperature.

  In this high-pressure discharge lamp, a container made of ceramics such as alumina having excellent heat resistance and chemical resistance has recently been used, and various luminous characteristics have been improved and the arc tube has become smaller. I came.

  The present invention has been made in view of the above problems, and recently, containers made of ceramics such as alumina having excellent heat resistance and chemical resistance have been used, and various light emission characteristics can be improved and miniaturized. A high pressure discharge lamp suitable for a discharge lamp using an arc tube that has been developed, and excellent in light emission characteristics such as color rendering, particularly in a red color rendering index R9, and improved in productivity such as quality and workability, and An object is to provide a lighting device.

  The high-pressure discharge lamp according to claim 1 of the present invention includes a discharge medium comprising a luminescent material and a rare gas enclosed in an airtight container, a color temperature of 3600 to 4200 K, a color deviation of duv−0.002 to +0.004, and an average color rendering. An arc tube emitting light at an evaluation number Ra of 85 or more; an envelope surrounding the arc tube; and a visible light absorption having an absorption peak at 550 to 600 nm formed on the surface of the envelope and emitting light at 600 nm or more A selective light-emitting organic compound film is provided, and is lit at a color temperature of 3100 to 3700 K, a color deviation of duv−0.003 to −0.010, and an average color rendering index Ra88 or more.

  The high-pressure discharge lamp of the present invention having the above-described structure is a visible light absorption / selective light-emitting organic compound film having an absorption peak near 580 nm and emitting light at 550 to 600 nm or more in an inner tube or an outer tube surrounding the arc tube. The above-mentioned predetermined light emission can be reduced by reducing the yellow light, reducing the yellowness of the irradiated light, and correcting the red light emission of 600 nm or more that is originally deficient in the light having an emission peak near 615 nm and absorbed. A high-pressure discharge lamp exhibiting light emission characteristics can be obtained.

  Further, in the present invention, it is preferable to apply to a lamp having a rated power of 200 W or less in consideration of applications.

  In addition, this invention and each following invention are accept | permitted that it is the following aspect.

  [About the arc tube] In the present invention, the arc tube provides at least a pair of electrodes and supports and feeds power to an airtight container formed of a light-transmitting and heat-resistant material made of hard glass such as ceramics or quartz glass. And a discharge medium. In particular, when a ceramic container is used, it can be made small and highly efficient.

  The shape of the light-transmitting hermetic container can be various, such as a cylindrical shape (T shape), a spherical shape (G shape, etc.), an elliptical sphere (a composite shape such as T shape or G shape), and the inner volume, The volume of the discharge space can be set to various values according to the magnitude of the rated lamp power of the high pressure discharge lamp.

  [Regarding Electrode] At least a pair of electrodes are sealed in the light-transmitting airtight container, and the tips are separated from each other and face the discharge space. The electrode can be formed using a refractory metal such as tungsten (W), doped tungsten, rhenium (Re), rhenium-tungsten alloy (Re-W), or molybdenum (Mo).

  In addition, the electrode is a portion that is disposed at the tip of the electrode shaft and mainly functions as a cathode and / or an anode, and the electrode shaft may also serve as an electrode, but in order to increase its surface area and improve heat dissipation, For example, a tungsten wire coil can be wound as required.

  [Discharge Medium] The discharge medium is composed of mercury, metal halide, or the like and a starting rare gas. In addition, a lamp voltage forming material can be preferably included.

  In the case of a metal halide, at least a luminescent metal halide is included. As the luminescent metal halide, various known luminescent metals and metal halides of combinations thereof can be used.

  The noble gas contributes to starting discharge at least when starting the high-pressure discharge lamp. However, the specific gas type is not limited. In the case of a high-pressure discharge lamp for general illumination, argon (Ar) gas is preferably used, but a mixed gas of argon (Ar) and neon (Ne) may be used.

  The lamp voltage forming substance is a discharge medium that mainly contributes to forming a voltage appearing between a pair of electrodes during lighting as a buffer, and mercury and / or metal halide can be used. As the metal halide as the lamp voltage forming substance, a metal halide having a relatively high vapor pressure can be used.

  [Envelope] An envelope is an inner tube that seals an arc tube in the case of a double tube structure, and an outer tube or arc tube that accommodates the inner tube and this inner tube in the case of a triple tube structure. When the arc tube provided so as to surround is broken, it refers to an inner tube (shroud) that prevents scattering of fragments and an outer tube that accommodates the inner tube. In the case of a reflective container such as the PAR type, the front lens that emits light and the reflector portion connected to the lens are referred to as an outer tube (envelope).

  The mode in which the arc tube and the inner tube are built in may be either airtight or communicating with the outside. In addition, the inner tube can accommodate a starting component, such as an ultraviolet ray source, a high voltage pulse generator, or a proximity conductor, at a predetermined position inside the arc tube as necessary to start the arc tube as required. .

  The material of the inner tube is not particularly limited, such as quartz glass, borosilicate glass, aluminosilicate glass, or soda lime glass. However, since the heat resistance is improved by forming the inner tube from quartz glass, the size can be reduced. Further, since the inner tube is covered with the outer tube, the inner tube is not directly touched with a finger, and the inner tube is not soiled. As a high-pressure discharge lamp for general illumination, the inside of the outer tube is generally set to a vacuum or an inert gas (for example, nitrogen (N) or argon (Ar) atmosphere).

  The outer tube accommodates an inner tube and a middle tube (shroud) in the inside thereof, and protects these members from being damaged by mechanical and finger fingers. The material of the outer tube is not particularly limited. For example, it can be formed of hard glass or semi-hard glass. As the outer tube, various shapes such as a T shape, a BT shape, and an R shape can be appropriately selected and adopted as desired. However, the opening side has a smaller inner diameter than the central portion. A bottomed cylindrical shape that is gradually reduced in diameter may be formed.

  The adhesive is not particularly limited as long as it can withstand the operating temperature during lighting of the high-pressure discharge lamp. In general, a heat-resistant ceramic-based inorganic adhesive is suitable. In addition, the aspect fixed by a predetermined | prescribed adhering means without using an adhesive agent may be sufficient.

  [About Visible Light Absorption / Selective Luminescent Organic Compound Coating] The coating has an absorption peak at around 580 nm, reduces yellow light at 550 to 600 nm, reduces yellowness of irradiation light, and has an emission peak at around 615 nm. Then, the red light emission of 600 nm or more which is originally deficient in the absorbed light is corrected. As a material for forming this film, Lumogen F Red 305 (manufactured by BASF Japan Ltd.) or the like can be used.

  The heat-resistant temperature of this coating is about 350 ° C., and it deteriorates in a high-temperature arc tube container and does not have a predetermined effect. Therefore, an inner tube, an inner tube surrounding the arc tube, or an outer tube containing these tubes It is formed on one of the inner and outer surfaces.

  [Regarding the Base] The base is generally defined as a lamp component that holds the main body of the high-pressure discharge lamp in the socket and performs the function of electrically connecting to the power source. E-type), plug-in type (G-type, S-type, etc.), pinless plug-in type, bi-post type base, and the like can be used.

  The high-pressure discharge lamp according to claim 2 of the present invention includes a discharge medium composed of a luminescent material and a rare gas enclosed in an airtight container, a color temperature of 2700 to 3200 K, a color deviation of duv−0.004 to +0.004, and an average color rendering. An arc tube emitting light at an evaluation number Ra of 80 or more; an envelope surrounding the arc tube; and a visible light absorption having an absorption peak at 550 to 600 nm formed on the surface of the envelope and emitting light at 600 nm or more A selective light-emitting organic compound film is provided, which is lit with a color temperature of 2200 to 2800 K, a color deviation of duv−0.005 to −0.015, and an average color rendering index Ra85 or more.

  A high-pressure discharge lamp having the same effect as that of the first aspect can be obtained.

  In the high-pressure discharge lamp according to claim 3 of the present invention, the coating is applied to the surface of the envelope and fired with a solution in which a visible light absorbing / selective light emitting organic compound is dispersed in a binder mainly composed of a silicon compound. Thus, the film is formed with a film thickness of 1 to 10 μm.

  By regulating the thickness of the coating, it is possible to obtain a high-pressure discharge lamp that affects the optical characteristics and coating strength, and that suppresses an increase in the amount of material used.

  In the high-pressure discharge lamp according to claim 4 of the present invention, the coating comprises a visible light absorption / selective light emitting organic compound and at least one of zinc oxide, aluminum oxide, silicon oxide, yttrium oxide, and a silicon compound as a main component. The solution dispersed in the binder is applied to the surface of the envelope and baked to form a film having a thickness of 1 to 10 μm.

By adding the above materials, it is possible to obtain a high-pressure discharge lamp in which the film thickness and transmittance are adjusted and the film strength is improved.

  The lighting device according to claim 5 of the present invention is the fixture main body; a reflector and a socket disposed in the fixture main body; and the lighting device according to any one of claims 1 to 4 attached to the socket. And a high-pressure discharge lamp.

  An illumination device (apparatus) to which the high-pressure discharge lamp according to any one of claims 1 to 4 is mounted, wherein the discharge lamp exerts the action according to claims 1 to 4, and therefore a predetermined light emission Illumination exhibiting characteristics can be performed.

  The lighting device (appliance) may be provided with a lighting circuit device in the fixture main body, or may be provided with a lighting circuit device outside the main body and connected to a discharge lamp. Further, a lens or a translucent front cover member may be provided in the main body on the reflector or the light emission side.

  A lighting device according to a sixth aspect of the present invention includes an appliance main body; a reflector and a socket disposed in the appliance main body; a discharge medium that is mounted on the socket and includes a luminescent material and a rare gas in the container. A high-pressure discharge lamp including an envelope that encloses an arc tube that emits light with a color temperature of 3600 to 4200 K, a color deviation of duv−0.002 to +0.004, and an average color rendering index Ra of 85 or more; A translucent front cover member provided to close the opening; and visible light absorption / selection having an absorption peak at 550 to 600 nm formed on the surface of the translucent front cover member and emitting light at 600 nm or more. A light-emitting organic compound film, and is irradiated with light at a color temperature of 3100 to 3700 K, a color deviation of duv−0.003 to −0.010, and an average color rendering index Ra88 or more. To.

  The illuminating device of the present invention having the above structure has a visible light absorption having an absorption peak near 580 nm on the surface of the translucent front cover member provided so as to close the opening of the instrument body and emitting light at 550 to 600 nm or more. -By forming a selective light-emitting organic compound film, when the discharge lamp emits light, the yellow light is reduced, the yellowness of the irradiated light is reduced, and the absorbed light having an emission peak near 615 nm is originally insufficient. An illumination device that can correct red light emission of 600 nm or more and exhibits the predetermined light emission characteristics can be obtained.

  A lighting device according to a seventh aspect of the present invention includes a fixture main body; a reflector and a socket disposed in the fixture main body; a discharge medium that is mounted on the socket and includes a luminescent material and a rare gas in a container. A high-pressure discharge lamp comprising an envelope enclosing an arc tube that emits light with a color temperature of 2700 to 3200 K, a color deviation of duv−0.004 to +0.004, and an average color rendering index Ra of 80 or more; A translucent front cover member provided to close the opening; and visible light absorption / selection having an absorption peak at 550 to 600 nm formed on the surface of the translucent front cover member and emitting light at 600 nm or more. A light-emitting organic compound film, and is irradiated with light at a color temperature of 2200 to 2800 K, a color deviation of duv−0.005 to −0.015, and an average color rendering index Ra85 or more. To.

  An illuminating device having the same effect as that of the sixth aspect can be obtained.

  In the lighting device according to claim 8 of the present invention, the coating film is applied to the surface of the translucent front cover member with a solution in which a visible light absorbing / selective light emitting organic compound is dispersed in a binder mainly composed of a silicon compound. -It is formed by baking with a film thickness of 1 to 10 m.

  By regulating the film thickness of the coating, it is possible to obtain an illuminating device that affects the optical properties and the coating strength, or that suppresses an increase in the amount of material used.

  In the lighting device according to claim 9 of the present invention, the coating film is mainly composed of a silicon compound containing a visible light absorbing / selective light emitting organic compound and at least one of zinc oxide, aluminum oxide, silicon oxide, and yttrium oxide. A solution dispersed in a binder is formed on a surface of a light-transmitting front cover member by coating and baking, and is formed with a film thickness of 1 to 10 μm.

  By adding the above materials, the film thickness and transmittance can be adjusted, and an illumination device with improved film strength can be obtained.

  According to the first and second aspects of the present invention, red color is corrected and high color rendering is exhibited, and the color deviation duv is controllable to the minus side, and there is little change. It is possible to provide a high-pressure discharge lamp suitable for illuminating the product.

  According to the invention of claim 3, it is possible to provide a high pressure discharge lamp excellent in light emission characteristics, film strength and productivity.

  According to the invention of claim 4, it is possible to provide a high-pressure discharge lamp in which the film thickness and transmittance can be easily adjusted and the film strength is improved.

  According to the invention of claim 5, since the high-pressure discharge lamp having the effect described in at least one of claims 1 to 4 is provided, it is possible to provide an illumination device (apparatus) excellent in various light emission characteristics.

  According to the inventions of claims 6 and 7, a product centering on red, such as food and clothing, which corrects red light emission and exhibits high color rendering, and can control the color deviation duv to the minus side and has little change. It is possible to provide an illumination device (apparatus) suitable for illuminating a light source.

  According to invention of Claim 8, the illuminating device (apparatus) excellent in the light emission characteristic, the film | membrane intensity | strength, and productivity can be provided.

  According to the ninth aspect of the present invention, it is possible to provide an illuminating device (equipment) in which the film thickness and transmittance can be easily adjusted and the film strength is improved.

  The lighting device (equipment) according to any one of claims 5 to 9 is used for lighting colored products such as fresh fish, meat, fruit, vegetables, fresh flowers, lighting for clothing such as a clothing store, or lighting for a household dining table. Use effect is great.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a partial cross-sectional front view showing a first embodiment for implementing a high-pressure discharge lamp of the present invention.

  The high-pressure discharge lamp L1 of this embodiment has a rated lamp power of 70 W, for example, and is formed on the surfaces of the outer tube 1 and the inner tube 2, the arc tube 4, the base 5 and the inner tube 2 forming a double envelope. It is composed of a triple tube having a selective absorption / selective light-emitting organic compound film 6 or the like as a main member.

  The outer tube 1 forming the outer envelope is formed of a T-shaped bulb having a bottomed cylindrical shape with a closed end made of hard glass, and the end surface of the base end portion 11 is an open opening. Yes. The outer tube 1 is made of a glass tube having a wall thickness of about 2 mm, an outer diameter of about 20 mm, and a length (including a clogging portion at the top of the head) of about 75 mm.

  The inner tube 2 forming the inner envelope is composed of an airtight container 21 made of quartz glass having a wall thickness of about 1.5 mm, an outer diameter of about 15 mm, and a length (including a pinch seal portion) of about 60 mm. An exhaust tip off portion 22 is formed at the center of the closed tip portion. A pinch seal portion 23 is formed at the base end portion. A pair of metal foils 24, 24 made of molybdenum Mo or the like are embedded in the pinch seal portion 23 in an airtight manner in parallel, and an internal introduction line 25 and an external introduction line 26 are provided at both ends of each sealing metal foil 24. Is connected. Note that one or a plurality of protrusions may be formed on both flat surfaces of the pinch seal portion 23 across the flat surface.

  Further, in the present embodiment, the inner tube 2 may be formed inside the inner tube 2 by a support member 31 that supports the arc tube 4 and the like in addition to the arc tube 4 (the internal lead wire 25 extends). ), An ultraviolet ray generation source 32 such as a UV enhancer, and incidental components such as a getter 33 are provided.

  The arc tube 4 has a small-diameter cylindrical portion as a pair of sealing bodies 42 and 42 in communication with the hermetic container 41 at a portion facing the hermetic container 41 having a substantially spherical shape made of translucent polycrystalline alumina ceramics. The current introduction conductors 43 and 43 are sealed in the small-diameter cylindrical portion, and the tip thereof protrudes into the airtight container 41 forming the discharge space, and is provided with a discharge electrode (not shown).

  The hermetic vessel 41 is filled with a discharge medium made of a luminescent metal halide, a starting gas, and mercury. The light emitting metal can be composed of a metal halide selected from the group of rare earth metals such as sodium (Na), thallium (Tl) and thulium (Tm).

  As shown in FIG. 1, the support member 31 may be formed by integrally extending the internal lead-in wire 25, and one internal lead-in wire 25 is a current derived from the sealing body 42 below the arc tube 4. The other inner lead-in wire 25 is welded to the lead-in conductor 43, extends along the tube axis direction at a position close to the inner wall of the air-tight container 21 of the inner tube 2, is bent near the tip of the air-tight container 21, and emits light. The arc tube 4 is fixedly supported by being welded to a current introduction conductor 43 which is led out from the sealing body 42 above the tube 4 and inserted into the exhaust tip-off portion 22 of the inner tube 2.

  The base 5 has a base body 51 formed of a steatite molded body in which an inner pipe fixing part 52, an outer pipe fixing part 53 and a power receiving part insulator 54 are integrally formed. The power receiving part insulator 54 includes a power receiving part. Is provided. Each of the power reception units includes a shell 55 a having a thread groove formed on the outer periphery made of a conductive metal and a center contact 55 b disposed at the center tip of the power reception unit insulator 54.

  The inner tube fixing portion 52 is formed of a long rectangular recess into which the pinch seal portion 23 of the inner tube 2 is inserted at the center of the base body 51, and the outer tube fixing portion 53 is an annular shape of the base body 51. It consists of an annular groove into which the base end portion 13 of the outer tube 1 formed concentrically inside the peripheral wall is inserted.

  The pinch seal portion 23 of the inner tube 2 inserted into the inner tube fixing portion 52 and the outer tube 1 inserted into the outer tube fixing portion 53 are adhesives 56 injected into the fixing portions 52 and 53. Are fixed by joining. The adhesive 56 is not particularly limited as long as it can withstand the operating temperature during lighting of the high-pressure discharge lamp. In general, however, an inorganic heat-resistant adhesive such as ceramics such as heat-resistant alumina is preferable. The embodiment may be fixed by any mechanical means without using the above.

  Also, a lead wire 27 connected to one of the external lead-in wires 26, 26 inserted through a central hole (not shown) of the power receiving portion insulator 54 of the base body 51 is connected to the shell 55a, and a lead wire connected to the other. (Not shown) is connected to the center contact 55b by means such as brazing or welding.

  The visible selective absorption / selective light emitting organic compound coating 6 formed on the outer surface of the outer tube 1 has an absorption peak at 550 to 600 nm and emits light at 600 nm or more, for example, Lumogen F Red 305 (manufactured by BASF Japan Ltd.) ) Coating film.

  The coating 6 is formed by first adding about 30 wt% of a silicone resin having a heat resistant temperature of about 325 ° C. to 1-methoxy-2-propanol to a solution prepared by adding about 0. A coating solution in which an organic compound composed of 2 wt% Lumogen F Red 305 is dissolved is prepared.

  Next, after immersing the outer tube 1 in this coating solution and pulling it up at a constant speed, the coating film adhering to the outer surface of the outer tube 1 is naturally dried, and when the coating film is dried, By performing the heat treatment for about 1 hour, the film 6 having a film thickness of about 6 μm can be obtained.

  The high-pressure discharge lamp L1 shown in the present embodiment having the above-described configuration is a triple-layered metal halide lamp L1 in which the inner tube 2 in which the arc tube 4 is sealed is further accommodated in a T-shaped outer tube 1, for example, the base body 5 side is Lights up with the base up in a vertical or inclined state.

  Incidentally, the light emission characteristics of the high-pressure discharge lamp are as follows. The discharge lamp having a structure in which the visible selective absorption / selective light-emitting organic compound film 6 is not formed on the outer tube 1 has a color temperature of about 3610 K and a color deviation duvRa. While light is emitted at about +0.0020, an average color rendering index Ra of about 95, and a red color rendering index of about R9 about 72, a visible selection mainly having lumogen F red 305 on the outer surface of the outer tube 1 of the lamp having the above configuration. The discharge lamp L1 after the absorption / selective light-emitting organic compound film 6 is formed has a color temperature of about 3130K, a color deviation duv of about −0.0080, an average color rendering index Ra of about 94, and a red color rendering index of about R9 of about 88. Emits light.

FIG. 2 shows the high-pressure discharge lamp L1 (solid line) of the present invention in which a film 6 is formed on the outer surface of the outer tube 1 using a material mainly composed of the above-mentioned Lumogen F Red 305 (manufactured by BASF Japan Ltd.), and the film 6 is formed. Is a graph showing an emission spectrum distribution with a high-pressure discharge lamp without a coating 6 (dotted line) before the process, in which the horizontal axis represents wavelength (nm) and the vertical axis represents relative energy distribution (radiant energy intensity) (%). I'm allowed. Table 1 is a comparison table of various light emission characteristics such as chromaticity coordinates (x, y), color temperature (CCT (K)), color deviation (duv), and color rendering index (Ra, R9). .

  That is, the film 6 mainly composed of the above-mentioned Lumogen F Red 305 (manufactured by BASF Japan Ltd.) has an absorption peak in the vicinity of 580 nm, reduces the yellow light of 550 to 600 nm, reduces the yellowness of the irradiation light, and Food that has a light emission peak near 615 nm and corrects red light emission of 600 nm or more, which is originally deficient by absorbed light, exhibits high color rendering, and the color deviation duv can be controlled to the minus side and has little change. It is possible to obtain a discharge lamp suitable for illuminating merchandise centering on warm red, such as clothing.

  The discharge lamp shown in the first embodiment of the present invention has a color temperature range of 3600 to 4200 K, color deviation duv−0.002 to +0.004, average color rendering index Ra85 or more, for example, before the coating 6 is formed. And having various light emission characteristics in the range of color temperature 3100-3700K, color deviation duv-0.003-0.010, average color rendering index Ra88 or more after the film 6 is formed. The above effects are exhibited.

  In addition, the high-pressure discharge lamp L1 of the present invention can improve productivity such that the film 6 is formed at a lower firing temperature than the prior art.

  Next, a second embodiment of the high-pressure discharge lamp of the present invention will be described. Since the external shape of the high-pressure discharge lamp of this embodiment is the same shape and rating as the lamp of the first embodiment, the description thereof is omitted.

  The light emission characteristics of the high-pressure discharge lamp L2 according to the second embodiment are that the discharge lamp having a structure in which the film before the formation of the visible selective absorption / selective light emitting organic compound film 6 is not formed on the outer tube 1 is the color temperature. Luminogen F Red is emitted on the outer surface of the outer tube 1 of the lamp having the above structure, while emitting light at about 3100K, color deviation duv about −0.0030, average color rendering index Ra about 93, and red color rendering index R9 about 43. The discharge lamp L2 after forming the visible selective absorption / selective light emitting organic compound film 6 mainly composed of 305 has a color temperature of about 2840K, a color deviation duv of about −0.0111, an average color rendering index Ra of about 90, and a red color. Light is emitted when the color rendering index R9 is about 78.

FIG. 3 shows a high pressure discharge lamp L2 (solid line) according to the present invention in which a film 6 is formed on the outer surface of the outer tube 1 using a material mainly composed of the above-mentioned Lumogen F Red 305, and a high pressure without the film 6 before the film 6 is formed. It is a graph which shows the emission spectrum distribution with a discharge lamp (dotted line), and in the figure, the horizontal axis compares wavelength (nm) and the vertical axis compares relative energy distribution (radiant energy intensity) (%). Table 2 is a comparison table of the above various light emission characteristics.

  The high-pressure discharge lamp L2 according to the second embodiment is a lamp that is replaced with an incandescent bulb using a known neodymium glass in which neodymium (Nd) is added to a bulb (outer bulb) forming material. In addition to having the same effect as the high pressure discharge lamp of the first embodiment, the use of a ceramic small arc tube results in higher efficiency and longer life compared to light bulbs, such as food and clothing, mainly red. It is possible to obtain a discharge lamp suitable for illuminating a commercial product.

  In addition, the discharge lamp L2 shown in the second embodiment of the present invention has a color temperature of 2700 to 3200 K, a color deviation of duv−0.004 to +0.004, and an average color rendering index Ra80 or more, for example, before the coating 6 is formed. Those having various light emission characteristics in the range, and having various light emission characteristics in the range of color temperature 2200 to 2800K, color deviation duv−0.005 to −0.015, and average color rendering index Ra85 or more after the film 6 is formed. The above-described effects are achieved.

  Next, a third embodiment of the present invention will be described. FIG. 4 is a front view of a reflective high-pressure discharge lamp L3. The same parts as those of the lamp L1 in the above embodiment are given the same reference numerals and the description thereof is omitted.

  In the high-pressure discharge lamp L3 according to the third embodiment, a bulb-shaped reflective base 71 in which a bulb (outer tube) 1 forming an envelope is formed with a reflective film (not shown) on a surface made of hard glass or the like. And the front lens 72 have a PAR shape formed by bonding or mechanically bonding or fusing them together with an adhesive, and have the same light emission characteristics as those shown in the first or second embodiment. Specifically, the inner tube 2 in which the arc tube 4 having substantially the same configuration is enclosed is accommodated, and the base 5 is joined to the base end portion of the reflective base 71.

  Then, a visible selective absorption / selective light emitting organic compound film 6 having light emission characteristics corresponding to the inner tube 2 shown in the first or second embodiment is formed on one of the inner and outer surfaces of the front lens 72. It is.

  For example, the bulb (outer tube) 1 accommodates the inner tube 2 in which the luminous tube 4 having the same luminous characteristics as that shown in the second embodiment is sealed, and the front lens 72 has a second surface on the surface thereof. The same visible selective absorption / selective light emitting organic compound film 6 as shown in the above embodiment was formed to obtain a discharge lamp L3 shown in FIG.

FIG. 5 shows a reflective high-pressure discharge lamp L3 (solid line) according to the present invention in which a film 6 is formed on the outer surface of the front lens 72 using a material mainly composed of the above-mentioned Lumogen F Red 305, and no film 6 before the film 6 is formed. Is a graph showing an emission spectrum distribution with a reflective high-pressure discharge lamp (dotted line), in which the horizontal axis compares wavelength (nm). Table 3 is a comparative table of the various light emission characteristics.

  The reflective high-pressure discharge lamp L3 in which the coating 6 is formed on the outer surface of the front lens 72 as described above exhibits the same effects as the high-pressure discharge lamps of the first and second embodiments, and provides food and clothing. Thus, a high pressure discharge lamp suitable for illuminating a product centered on red can be obtained.

  FIG. 6 is a cross-sectional front view of an essential part showing a lighting device (apparatus) composed of a spotlight for indoor lighting using the high-pressure discharge lamp L1 or L2 according to the first or second embodiment of the present invention.

  The illuminating device (instrument) 9 includes a mounting base 91 attached to a ceiling surface and the like, a support column 92, a box-like equipment body 94 having an opening 93 that emits light on at least one surface, and a socket provided in the equipment body 94. 95, a reflecting mirror 96, and a translucent front cover 97 made of glass, synthetic resin, or the like covering the opening 93 is configured as a main component.

  The instrument main body 94 can be rotated in a horizontal plane and a vertical plane with respect to the mounting base 91 via a support column 92. Further, the lighting circuit device (not shown) may be disposed in the instrument main body 94 or the mounting base 91, or may be separately disposed on the back of the ceiling or the like.

  In this lighting device (apparatus) 9, when, for example, the high-pressure discharge lamp L1 attached to the socket 95 is turned on via a lighting circuit device (not shown), the direct light and the reflected light from the reflecting mirror 96 emit light. Light is irradiated to a product such as clothing through the light-transmitting front cover 97 provided. At this time, the irradiated light exhibits the light emission characteristics shown in Table 1, for example, and illumination with a good appearance with improved reproducibility such as red of the product can be performed.

  Further, in this kind of lighting device (apparatus) 9, the visible selective absorption / selective light emitting organic compound film 6 is formed in the same manner as described above on either the inner or outer surface of the translucent front cover 97. Even if a high pressure discharge lamp not formed with the visible selective absorption / selective light emitting organic compound coating 6 described in Table 1 or Table 2 is attached to the socket 95 and the lamp is turned on, the coating is applied from the opening 93 that emits light. The product can be illuminated with light through 6 and illuminated with good reproducibility such as red color of the product.

  For example, the high pressure discharge lamp in which the visible selective absorption / selective light emitting organic compound film 6 is not formed on the surface of the outer tube 1 shown in the first embodiment is used, and the inside and outside of the translucent front cover 97 made of glass are used. FIG. 7 shows a graph of FIG. 7 for a combination lighting device (apparatus) 9 in which a visible selective absorption / selective light emitting organic compound film 6 made of a material mainly composed of the above-mentioned Lumogen F Red 305 is formed on any surface, here the outer surface. The emission spectrum distribution shown was exhibited.

In the figure, the horizontal axis indicates the wavelength (nm), the vertical axis indicates the relative energy distribution (radiant energy intensity) (%), and the solid line indicates the visible selection of a film thickness of about 6 μm on the translucent front cover 97. Absorptive / selective luminescent organic compound coating 6 formed, one-dot chain line shows visible selective absorption / selective luminescent organic compound coating 6 with a film thickness exceeding 10 μm, dotted line shows visible selective absorption / selective luminescent organic A compound film is not formed, and Table 4 is a comparative table of the above three light emission characteristics.

  Even when the coating 6 is formed on the surface of the translucent front cover 96 on the side of the lighting device (apparatus) 9 as described above, the same effects as the high-pressure discharge lamps of the first to third embodiments are obtained. It is possible to obtain an illuminating device (apparatus) 9 suitable for illuminating a product centered on red, such as food and clothing.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the metal halide lamp has been described as the high-pressure discharge lamp. However, the metal halide lamp is not limited to a metal halide lamp, and a lamp such as a high-pressure sodium lamp or a mercury lamp may be used. When applied to a lamp having a predetermined light emission characteristic in a state where it is not, the above-mentioned effects are obtained.

  When the hermetic vessel constituting the arc tube is formed by translucency, for example, single crystal metal oxide such as sapphire, polycrystalline metal oxide, such as translucent airtight aluminum oxide, yttrium-aluminum- Garnet (YAG), yttrium oxide (YOX), polycrystalline non-oxide such as aluminum nitride (AlN) can be used, and in addition to ceramic materials, quartz glass, borosilicate glass, aluminosilicate glass, etc. are used. The shape can be G-shaped, T-shaped, or the like or a composite shape thereof.

  The outer tube and inner tube forming the envelope are made of hard glass such as quartz glass, borosilicate glass or aluminosilicate glass, or soft glass such as soda lime glass, and the shapes thereof are A type, G type and R type. , T-type, PS-type, BT-type, etc., or those formed in a composite shape can be used. In addition, the envelope can be applied to multiple tubes such as a double tube and a triple tube, and these envelopes may be airtight or non-airtight, and may be a middle tube (shroud) that prevents scattering of the arc tube container. ) May be provided.

In addition, the high-pressure discharge lamp has at least a pair of discharge electrodes sealed in an arc tube, and the starting circuit unit disposed in the envelope is not limited to an ultraviolet light source such as a UV enhancer, but a lighting tube or the like. It may be used.

In addition, the material of the visible selective absorption / selective light emitting organic compound coating formed on the surface of the lamp envelope or the translucent front cover of the lighting device is not limited to Lumogen F Red 305 (manufactured by BASF Japan Ltd.). . In addition, a solution containing at least one oxide fine particle selected from zinc oxide (ZnO), aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ) yttrium oxide (Y ₂ O ₃ ) is added to the Lumogen F Red 305 as a solution. About 10 to 50 wt% of the coating may be added and mixed to form a coating. By this addition, the film thickness and transmittance can be adjusted and the coating strength can be improved.

In addition, the outer tube, the inner tube, the envelope of the front lens, etc., or the front surface cover of the lighting device (equipment), etc., the film forming part is one of the inner and outer surfaces of these members. Should be determined in consideration of

  Moreover, if the film thickness is in the range of 1 to 10 μm, the above-mentioned range of light emission characteristics can be satisfied. When the thickness exceeds 10 μm, the amount of material used increases and the coating strength tends to decrease, and the transmittance varies greatly.

  In addition, in order to obtain various light emission characteristics within a predetermined range, it can be done by adjusting the film thickness of the coating, and this adjustment can be done by changing the pulling speed of the outer tube from the coating solution and the number of times of immersion in the coating solution. Thus, a desired film thickness can be obtained. Further, the formation of the film is not limited to immersion in the coating solution, but may be a means such as spraying or vapor deposition.

The base is not limited to the one having the inner tube fixing portion and the outer tube fixing portion having the structure shown in the above embodiment, and various fixing means can be adopted. The base is not limited to a screw-in type (such as E type), but may be a plug-in type (such as S-type) or a pin-insertion type (such as G-type).

  Furthermore, the lighting device (equipment) is not limited to the one shown in the above embodiment, and even if the lighting circuit device is provided in the fixture main body, the lighting circuit device is provided outside the main body and connected to the high-pressure discharge lamp. Furthermore, depending on the discharge lamp, a lens or a light-transmitting front cover member may not be provided on the reflector body or the light emission side in the apparatus main body.

  This illuminating device is preferable for illumination in stores or restaurants that handle food and clothing.

It is a partial cross section front view which shows 1st Embodiment of the high pressure discharge lamp of this invention. It is a graph which shows the emission spectrum distribution of a high pressure discharge lamp. It is a graph which shows the emission spectrum distribution of a high pressure discharge lamp. It is a front view which shows 3rd Embodiment of the high voltage | pressure discharge lamp (reflection type) of this invention. It is a graph which shows the emission spectrum distribution of a high pressure discharge lamp. It is a partial cross section front view which shows embodiment of the illuminating device (instrument) of this invention. It is a graph which shows the emission spectrum distribution of a high pressure discharge lamp.

Explanation of symbols

L1 to L3: High pressure discharge lamp (metal halide lamp)
1: Outer tube (envelope)
2: Inner pipe 21: Airtight container (envelope)
4: Luminescent tube 6: Visible selective absorption / selective luminescent organic compound coating 9: Lighting device (apparatus)
94: Instrument body 96: Translucent front cover member

Claims (9)

An arc tube in which a discharge medium composed of a luminescent material and a rare gas is sealed in an airtight container and emits light at a color temperature of 3600 to 4200 K, a color deviation of duv−0.002 to +0.004, and an average color rendering index Ra85;
An envelope surrounding the arc tube;
A visible light absorbing / selective light emitting organic compound film having an absorption peak at 550 to 600 nm and light emission at 600 nm or more formed on the surface of the envelope;
A high-pressure discharge lamp that is lit at a color temperature of 3100 to 3700K, a color deviation of duv−0.003 to −0.010, and an average color rendering index Ra88 or higher. An arc tube that encloses a discharge medium composed of a luminescent substance and a rare gas in an airtight container and emits light at a color temperature of 2700 to 3200 K, a color deviation of duv−0.004 to +0.004, and an average color rendering index Ra80;
An envelope surrounding the arc tube;
A visible light absorbing / selective light emitting organic compound film having an absorption peak at 550 to 600 nm and light emission at 600 nm or more formed on the surface of the envelope;
A high pressure discharge lamp which is lit at a color temperature of 2200 to 2800 K, a color deviation of duv−0.005 to −0.015, and an average color rendering index Ra85 or more.   The coating film is formed with a film thickness of 1 to 10 μm by applying and baking a solution in which a visible light absorbing / selective light emitting organic compound is dispersed in a binder mainly composed of a silicon compound on the surface of the envelope. The high pressure discharge lamp according to claim 1, wherein the high pressure discharge lamp is provided.   The coating film has a surface of an envelope containing a solution in which a visible light absorbing / selective light emitting organic compound and at least one of zinc oxide, aluminum oxide, silicon oxide, and yttrium oxide are dispersed in a binder mainly composed of a silicon compound. The high-pressure discharge lamp according to claim 1 or 2, wherein the high-pressure discharge lamp is formed with a film thickness of 1 to 10 µm by coating and baking. An instrument body;
A reflector and socket disposed within the instrument body;
The high-pressure discharge lamp according to any one of claims 1 to 4 mounted in the socket;
An illumination device comprising: An instrument body;
A reflector and socket disposed on the instrument body;
Light emission that emits light with a color temperature of 3600 to 4200 K, a color deviation of duv−0.002 to +0.004, and an average color rendering index of Ra85 or more, in which a discharge medium composed of a luminescent material and a rare gas is sealed in a container. A high pressure discharge lamp with an envelope surrounding the tube;
A translucent front cover member provided to close the opening of the instrument body;
A visible light absorbing / selective luminescent organic compound coating film having an absorption peak at 550 to 600 nm and emitting light at 600 nm or more formed on the surface of the translucent front cover member;
And irradiating with light at a color temperature of 3100 to 3700K, a color deviation of duv−0.003 to −0.010, and an average color rendering index Ra88 or more. An instrument body;
A reflector and socket disposed on the instrument body;
Light emission that emits light with a color temperature of 2700 to 3200 K, a color deviation of duv−0.004 to +0.004, and an average color rendering index of Ra80 or more, in which a discharge medium made of a luminescent material and a rare gas is sealed in a container. A high pressure discharge lamp with an envelope surrounding the tube;
A translucent front cover member provided to close the opening of the instrument body;
A visible light absorbing / selective luminescent organic compound coating film having an absorption peak at 550 to 600 nm and emitting light at 600 nm or more formed on the surface of the translucent front cover member;
And irradiating light at a color temperature of 2200 to 2800 K, a color deviation of duv−0.005 to −0.015, and an average color rendering index Ra85 or more.   The coating film is formed with a film thickness of 1 to 10 μm by applying and baking a solution in which a visible light absorbing / selective light emitting organic compound is dispersed in a binder mainly composed of a silicon compound on the surface of the translucent front cover member. The illuminating device according to claim 6 or 7, wherein   The film is a translucent front cover member in which a solution in which a visible light absorbing / selective light emitting organic compound and at least one of zinc oxide, aluminum oxide, silicon oxide, and yttrium oxide are dispersed in a binder mainly composed of a silicon compound is dispersed. The illuminating device according to claim 6 or 7, wherein the lighting device is formed to have a film thickness of 1 to 10 µm by coating and baking on the surface of the lighting device.

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