JP2010192415A - Light transmission and diffusion filter for lighting use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light transmission and diffusion filter or an illumination cover which dissipates light source images of a point light source such as an LED or linear a light source such as a cold-cathode tube by way of light diffusion under high transmittance. <P>SOLUTION: The light transmission and diffusion filter for lighting purpose dissipates the light source image of a point light source such as an LED or a linear light source such as a cold-cathode tube by way of light transmission through the light transmission and diffusion filter formed by arranging uniform dispersion of quartz glass fine particles and a light dispersion agent content in a light transmission resin. The light transmission and diffusion filter or an illumination cover using the light transmission and diffusion filter is integrally formed, with the particle size of the quartz glass fine particles to be in an average particle diameter of around 1 to 30 μm, a content of the same to be 0.01 to 5% in a weight ratio, contents of impurities in the same to be in terms of oxide 0.01 to 2 mass%, and also a coloring agent such as a fluorescent material or red dye to be applied to an outer surface of the quartz fine particles, and furthermore, contents of the light diffusion agent in a weight ratio to be of 0.01 to 2% and in addition, groove portions of predetermined shapes including a V-shaped or curved surface shape with an internal angle of 70 to 120° are formed on the light source side internal surface of the light transmission and diffusion filter. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention, LED lighting lamp changing the irradiation angle of the (light emitting diode) and a light source image of the point light source of many arranged the emitting module and lighting changes the color rendering properties such as warm white together to eliminate scattered light illumination The present invention relates to a light transmission diffuse filter.

  Conventional fluorescent lamp type lighting fixtures using LEDs are commercially available due to reduced power consumption and long life, and grooves are formed in the lighting cover for the purpose of scattering the point light sources of the LEDs. A luminaire formed and diffused so that the point light source looks like a ring in a straight circumferential direction, and a large number of point light sources pursuing brightness by transmitting the LED point light source as it is Lighting fixtures used for lighting are sold.

  As another example, for the purpose of diffusing and eliminating the light source image of the point light source, a translucent diffusing agent is introduced into the lighting cover to diffuse the light, and is sold as a milky white fluorescent lamp type lighting fixture.

  Furthermore, there is a “light guide plate” as a prior art example of the prior art, and the exemplified light guide plate 3 is 0.15 to 0.25% by weight of quartz particles 1 having an outer diameter of 5 to 50 μm and an outer diameter of 5%. ˜25 μm of calcium carbonate particles 2 are mixed in an amount of 0.01 to 0.05% by weight. The quartz particles 1 scatter and reflect a part of incident light on the surface and introduce a part of incident light into the inside. Then, the calcium carbonate particles 2 scatter and reflect all of the incident light on the surface, so that the light of the light source 5 is introduced from the base end surface of the side surface of the light guide plate 3 and the light is transmitted to the outside from the front surface. The luminance unevenness of the emitted light is suppressed and the luminance is improved. (For example, see Patent Document 1)

  In addition, there is an “illumination device” as an example of a prior application, and the illumination device includes a diffusion guide portion 214 that diffuses light irradiated from an LED module 212 including a plurality of LEDs 211 and a cover 215 thereof. Light is emitted from the LED modules 212 at both ends of the lighting device 200, the light is refracted and diffused by the concave grooves 218 of the diffusion guide portion 214, and the light emitted through the diffusion guide portion 214 is reflected by the cover. It is assumed that the phosphor formed on the inner surface of 215 is led to the outside as white light. (For example, see Patent Document 2)

JP 2005-215005 A JP 2007-149668 A

  Conventionally, a direct fluorescent lamp type lighting fixture using a commercially available LED has a groove formed on the inner surface of the lighting cover for the purpose of diffusing the light source image of the LED point light source. Although the point light source is refracted and diffused, the light source image of the LED point light source is diffused, but the light scattering rate is low and the light is glaringly stimulating, the load on the eyes is large, and the glare remains and the fluorescent light remains. Therefore, there has been a demand for lighting that does not have such a soft light, and thus improves glare and reduces the load on the eyes.

  Moreover, the milky white fluorescent lamp type lighting fixture that diffuses light by introducing a light diffusing agent into the cover of the light emitting module illumination can obtain a soft light with high diffusion, while having a light transmittance of 50 to 60%. Since there is a large light transmission loss and a sufficient illuminance cannot be obtained, there is a need for an illumination that is inferior in energy efficiency, and thus has high transmission, energy efficiency, and soft light that is easy on the eyes.

  In addition, light emitting module lighting is a white color that is unique to LEDs, and the improvement in color rendering, such as the light bulb color, has been dealt with by introducing it into the lighting cover. However, as described above, the light transmission loss is large and the illuminance is high. There is a drawback that it falls, and there is a need for lighting that can improve the color rendering properties such as the color of the light bulb without reducing its illuminance.

  In addition, when installing a light-emitting module lighting fixture on the ceiling, the luminous flux is concentrated downward, increasing brightness and energy efficiency, and when installing the lighting fixture on the wall side, illuminate the luminous flux from the wall to a wide angle. There is no proposal of a lighting fixture that can brighten the entire surface in front of the wall and reduce the amount of light to the eyes, and it can be used with a filter or lighting cover for light-emitting module lighting fixtures with high diffusion and low light transmission loss. Therefore, lighting that can adjust the irradiation angle has been waiting for a long time.

  In addition, the above-mentioned lighting with high diffusion soft light, low transmission loss, energy efficiency, and improvement of color rendering such as light bulb color can be used as an independent filter as appropriate according to the situation of use. There has been a long-awaited lighting fixture that can be easily formed as an integral part of the cover.

  Further, the light guide plate disclosed in Patent Document 1 introduces light from the light source 5 from the base end surface of the light guide plate 3, and suppresses uneven brightness of the light emitted from the front surface to the outside by the quartz particles 1. In order to improve the brightness, the light from the front surface is uniform surface emission and the brightness is increased. Therefore, it is necessary to uniformly distribute the light from the side surface, and therefore, in the vicinity of the light source 5 and the farthest center. In other words, light is uniformly transmitted through the entire surface of the light guide plate 3, and it corresponds to light from the side surface.

  In addition, it is the dispersion of the light amount in the vicinity of the light source 5 and the farthest center, and it is necessary to reduce the dispersion in the vicinity of the light source 5 and to increase the dispersion in the vicinity of the farthest center. The average dispersion of the light irradiated on the entire surface average is not possible due to the difference in the dispersion rate of the light source, and this does not achieve the purpose of diffusing and erasing the light source image of the point light source. There has been a demand for a dispersion light that can dissipate the image.

  Furthermore, the illumination device of Patent Document 2 includes a diffusion guide portion 214 that diffuses light emitted from the LED module 212 on the side surface and irradiation with the cover 215 in substantially the same manner as the light guide plate described above. In addition, the light is refracted and diffused by the concave groove 218 of the diffusion guide part 214, and the light emitted through the diffusion guide part 214 is made to be white light by the phosphor formed on the inner surface of the cover 215. Therefore, it is necessary to make the illuminance near the light source and near the center uniform as described above, but the uniformity cannot be achieved only by the concave groove 218, and thus the dispersed light that transmits the surface and diffuses the light source image is lost. What was needed was obtained.

In order to effectively achieve the above-described problem, the present invention provides, as a first solving means, quartz glass fine particles, a light diffusing material, and a light source image of illumination light such as an LED so that the diffused light can be lost and the color rendering can be improved. A light-transmitting diffuser filter in which a colorant such as a dye or pigment such as red is uniformly dispersed in a light-transmitting resin , phosphors are uniformly dispersed to improve the color rendering, and at least the outer surface of the quartz glass fine particles is improved in color rendering By attaching the phosphor as a material ,
The light source image of the LED point light source is supposed to improve the light dissipation and color rendering .

Further, as a second solving means , a light transmission diffuser filter or a light transmission diffuser cover using the light transmission diffuser filter as an illumination cover so that the illumination angle of the illumination light can be changed in accordance with the mounting position of the illumination device. By forming a required number of V-shaped inner angle of a required angle of approximately 70 to 120 ° and a groove portion of a predetermined shape in the longitudinal direction ,
The illumination angle of the illumination light is changed so that the illumination angle in the range illuminated by the illumination light, such as a wide angle or a narrow angle, corresponds to the mounting position of the illumination device.

The present invention is such that an effective effect can be obtained by each of the above-described means. In particular, the present invention is an illumination lamp of a point light source such as an LED or a linear light source such as a cold cathode lamp, and the light of the light source is Through a light-transmitting light-diffusing filter, the light source image can be diffused and the color rendering can be improved by using silica glass fine particles and light diffusing materials such as titanium dioxide, silica and calcium, and coloring materials such as red dyes and pigments. In the light transmission diffuser filter uniformly dispersed in the translucent resin, the phosphor is uniformly dispersed to improve the color rendering property, and the phosphor is attached to at least the outer surface of the quartz glass fine particles as a color rendering property improving material . By the solution of
When the white light of the LED is irradiated on the outer surface of the silica glass fine particles, the light is reflected and transmitted through the surface of the silica glass fine particles, and the phosphor on the surface of the fine particles is excited to emit light, thereby improving the red color rendering. In addition, an apparent red light bulb color light can be obtained with a colorant such as a red dye, and by combining with a green colorant, color rendering can be further improved without using an expensive three-wavelength LED. Each color rendering property improving material can improve the color rendering property suitable for the place of use, and lighting suitable for the place of use can be obtained at a relatively low cost. a light bulb color or white, also the color rendering that can be improved to more natural color meat, of natural color or appearance of the food, such as vegetables color scheme is in the shops, further printing, match the lighting to be used, such as the painting of the color scheme inspection It can improve the color rendering properties Te.

Further, in accordance with the above-described effects, when the quartz glass fine particles transmit light through the translucent resin, a part of the quartz glass fine particles is transmitted through the quartz glass fine particles, whereby the light is bent and reflected on the surface, and each quartz glass fine particle is reflected. By irregularly reflecting the surface between the glass particles, the phosphor is more effectively excited to emit light, thereby improving red color rendering.

Furthermore, it reflects on the surface of the light diffusing material such as titanium dioxide, silica, calcium, etc. and diffusely reflects on the surface between each light diffusing material. In the conventional optics, high transmittance and high diffusion, which are contradicting themes, are obtained. It is possible to achieve this, whereby energy-efficient transmitted light can be obtained, and glare caused by scattered light can be improved, and illumination with reduced eye-rendering and softness can be obtained.

And since the diffused light is not a polygonal reflection using a conventional polygonal lens, there is no subtle shadow in the light (a weak shadow that can be generated by the intensity of reflected light). As a light source with good distribution and no shadowing, it can be used for inspection lighting such as accurate color check of printed finish, general purpose copy scanner light source and product inspection scanner light source, and also energy saving compared to fluorescent lamps etc. Because it can be used as a long-life light source, the cost is reduced.

In addition, since the silica glass fine particles have a spherical particle size, the fluidity when dispersed in a translucent resin is improved, and thus the moldability is good. As compared with the case where no quartz component is contained, the temperature of the light transmission diffuser filter and the entire illumination cover can be kept lower, and the heat dissipation characteristics can be improved.

Further, as a second solving means, in the light transmission diffuser filter for illumination lamps or the light transmission diffuser cover using the light transmission diffuser filter as the illumination cover, the illumination angle of the illumination light can be changed corresponding to the mounting position of the illumination device. manner, by an interior angle on the light transmissive diffuser filter or said light transmissive diffuser cover a substantially V-shape has been required number forming the groove of the required angle and a predetermined shape of approximately 70 to 120 ° in the longitudinal direction,
Depending on where the luminaire is used, ceiling-mounted luminaires illuminate brightly by concentrating the luminous flux downward, and wall-mounted luminaires illuminate the luminous flux from a wall at a wide angle to disperse the amount of light and glare. Since the illumination angle can be adjusted as illumination that illuminates the entire room in front of the wall surface, the dazzling appearance of the wall surface illumination can be reduced, and illumination with high illuminance and energy efficiency in accordance with the use situation of the room can be obtained.
Therefore, the present invention has a practically significant effect.

  FIG. 3 is an imaginary view showing a dispersion image of quartz glass fine particles 3 containing impurities and a light diffusing material 4 in a main part of the light transmission / scattering filter 1 of the present invention.   FIG. 5 is an imaginary view showing a dispersion image of quartz glass fine particles 3 and a light diffusing material 4 to which a color rendering property improving material 6 is attached, in a main part of another light transmission / diffusing filter 1 of the present invention.   FIG. 5 is an imaginary view showing an image of attaching impurity components 5 and color rendering property improving material 6 of quartz glass fine particles 3.   FIG. 6 is an imaginary view showing an image of attaching an impurity component 5 of another quartz glass fine particle 3 and a color rendering property improving material 6.   FIG. 5 is an imaginary view showing an image of attaching the impurity component 5 of the other quartz glass fine particles 3 and the color rendering property improving material 6.   It is a perspective view showing the use condition of the light transmission diffuse filter of the Example of this invention.   FIG. 4 is an imaginary view showing a diffuse image of light fluxes of quartz glass fine particles 3 containing an impurity component 5 and a light diffusing material 4 in a main part of another light transmission / scattering filter 1a of the present invention.   It is a perspective view of the partial cross section which abbreviate | omitted a part of illumination lamp | ramp 12 of the other Example of this invention.   It is sectional drawing showing the narrow angle image of the irradiation angle of the light beam of the illumination lamp | ramp 12a.   It is sectional drawing showing the wide-angle image of the irradiation angle of the light beam of the illumination rod 12b.

By transmitting light from a point light source such as an LED or a linear light source such as a cold cathode lamp to a light transmission diffuser filter in which quartz glass fine particles and a light diffusing material are uniformly dispersed in a light-transmitting resin, the light source image is lost. The light transmission diffuser filter or the light transmission diffuser filter is integrally formed as a lighting cover , and the content of the light diffusing material dispersed and contained in the translucent resin is set to 0.01 to 2% by weight, and the quartz It is assumed that the average particle size of the glass particles is about 1 to 30 μm, the content is 0.01 to 5% by weight, and the impurity component is contained in the inside in an amount of 0.01 to 2% by mass in terms of oxide. , its surface of silica glass particles is impregnated with the phosphor color rendering improving material, further light transmissive diffuser filter or light transmitting diffuser filter V-shape or the light source side of the light transmitting diffuser cover used as the lighting unit cover In a predetermined shape such as a surface shape, the interior angle is adjusted to a narrow angle or a wide angle illumination angle illuminating by forming the groove of 70 to 120 °, the light source image of the linear light source such as a point light source or a cold cathode Kan like LED with high transmittance, and red improved color rendering properties, such as warm white together to the diffuser loss, also adjusted to a narrow angle or a wide angle of the place of use and purpose, the light transmission diffuser of illumination to correspond suitably each is obtained It was realized a filter or light cover.

  An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a light transmissive diffuser filter, and the light transmissive diffuser filter 1 includes a transparent translucent resin 2 as a base material, and the translucent resin. In FIG. 2, spherical quartz glass fine particles 3 and a light diffusing material 4 are uniformly dispersed.

Therefore, the quartz glass fine particles 3 shown in FIG. 1 are spherical fine particles containing quartz as a main component, and an impurity component 5 is contained therein, and the impurity component 5 includes Al, Ti, Fe, Nb, Zr, Mn. And Mo, more specifically, Al ₂ O ₃ , TiO ₂ , Fe ₂ O ₃ , Nb ₂ O ₅ , ZrO ₂ , MnO _2, MoO _2, etc., and alumina (Al ₂ O ₃ ) as an example. 5a, titanium dioxide (TiO ₂ ) 5b, and iron oxide (Fe ₂ O ₃ ) 5c are contained as impurity components 5.

Further, the ratio of the impurity component 5 contained in the quartz glass fine particles 3 is not particularly limited, but when viewed from the light transmission efficiency and the like, the total amount of the quartz glass fine particles 3 is set to 100% by mass and 0 in terms of oxide of each element. It is 0.01-2 mass%, Preferably it is about 0.04-0.15 mass%, and in this range, translucency and light dispersibility are most efficiently obtained.

In addition , the oxide conversion of the impurity component 5 is that Al is Al ₂ O ₃ , Ti is TiO ₂ , Fe is Fe ₂ O ₃ , Nb is Nb ₂ O ₅ , Zr is ZrO ₂ , Mn is MnO ₂ , and Mo is MoO _2. In addition, the content is a total amount in terms of oxides when plural kinds of the above elements are contained in the quartz glass fine particles 3.

  Further, the size and shape of the quartz glass fine particles 3 are not particularly limited, but the average particle size (maximum length) is preferably 1 to 30 μm, more preferably about 4 to 5 μm. Sufficient light dispersibility can be obtained while securing the properties.

  In addition, the shape of the quartz glass fine particles 3 is not particularly limited, but because of the above spherical shape, the fluidity when dispersed and contained in the translucent resin 2 is good, so that there is an advantage that the molding workability is good, The quartz glass fine particles 3 preferably have a light transmittance of 50% or more (more preferably 60%) with respect to light having a wavelength of 300 to 950 nm.

  In addition, the content of the quartz glass fine particles 3 with respect to the translucent resin 2 is not particularly limited, but is 0.01 to 5 mass% (more preferably) when the entire translucent resin 2 is 100 mass%. Is preferably 0.01 to 0.045 mass%).

Further, the light diffusing material 4 is made by adding titanium dioxide (TiO ₂ ) to the translucent resin 2 in a weight ratio of 0.01 to ₂ %, so that the translucent resin 2 itself becomes white and diffuses light. In addition to the titanium dioxide, alumina, silica, calcium and the like can be used.

  In addition, titanium dioxide, alumina, silica, calcium, and the like of the light diffusing material 4 are selected correspondingly depending on the translucent resin 2 to be used. As an example, when the molding temperature of the acrylic resin is 250 to 270 ° C., calcium, silica However, at a molding temperature of 350 to 370 ° C. of the polycarbonate resin, calcium and silica are burnt by the heat and denatured to brown, and titanium dioxide is optimal for use in that temperature range. Each is selected corresponding to the translucent resin 2 used.

Thus, in order to improve the color rendering properties (complementing the light in the visible light red region and the visible light green region) of the light transmissive diffuser filter 1, the color rendering property improving material 6 is particularly preferably quartz glass as shown in FIG. The fluorescent particles 6c are attached to the surfaces of the fine particles 3, and the fluorescent particles 6c receive the light, and the fluorescent particles 6c excite and emit light. And the color rendering properties are improved, and the fluorescent particles 6c are further excited by the transmission through the quartz glass fine particles 3 and the reflection on the surface thereof, thereby improving the color rendering properties of the red component.

Further, as an improvement of the color rendering properties, it is contained in the translucent resin 2 and various dyes (direct dyes) color rendering improving material 6 on the surface of the silica glass particles 3 or pigments may be used, of which red Examples of dyes (red dyes) from which light is obtained include diamine / scarlet and alizarin red S, and examples of dyes (green dyes) from which green light can be obtained include oxamine green and methyl green. .

The color rendering property improving material 6 is also effective as a red color particle 6a in which a red dye is attached to the surface of the quartz glass fine particle 3 as a colorant for color rendering to a bulb color light, and a green dye is attached. It is also possible to approach the three-wavelength LED characteristics by mixing with the green particles 6b .
In addition, the above-mentioned dye, pigment, or phosphor is used by appropriately changing depending on the material of the translucent resin 2, color rendering requirements, use environment, and the like.

Further, in attaching the color rendering property improving material 6 to the surface of the quartz glass fine particle 3, as shown in FIG. 3, the color rendering property improving material 6 was electrostatically attached to the surface of the quartz glass fine particle 3. FIG. 4 shows a form in which the color rendering property improving material 6 is attached to the surface of the quartz glass fine particles 3 through the attachment material 7, and FIG. 5 shows a color rendering on the surface of the quartz glass fine particles 3. 3 shows a form in which the property improving material 6 is coated with an adhesive 7 and attached.
In addition, these forms to be attached are appropriately changed according to use conditions and the like, and the color rendering property improving material 6 may be used alone or in combination of two or more.

Thus, as an example of using the light transmissive diffuser filter 1, as shown in FIG. 6, when used for a transparent illumination cover 9 of a linear light source 8 such as a cold cathode lamp, the illumination cover 9 and the linear illumination cover 9 are linear. By disposing the light transmission diffuse filter 1 between the light source 5 and the plurality of light emitted from the linear light source 8 is diffused by passing through the light transmission diffuse filter 1, the multiple light source image is lost and the illumination is performed. When viewed through the cover 9, it appears as one light source emitted from the entire light transmission diffuse filter 1 .

The linear light source 8 shown here assumes a state in which a plurality of linear light sources 8 such as a plurality of cathode lamps or a plurality of fluorescent lamps are arranged, but in the drawing, it is shown as one and two imaginary figures, the arrangement number of the linear light source 8 Ru is formed by appropriately changing according to the shape of the arrangement number of the shape of the light cover 9 from a substantially tunnel-shaped depicted, shown modified figure are omitted.

  Further, as another embodiment of the light transmissive diffuser filter 1, as shown in FIG. 7, on the light source side of the light transmissive diffuser filter 1a containing the silica glass fine particles 3 containing the impurity component 5 and the light diffusing material 4. A groove portion 10 having a V-shape and an inner angle of 70 to 120 ° (indicated by an arrow A in the figure) is formed in a concavo-convex shape in the longitudinal direction so that an irradiation angle suitable for the use application of illumination light can be obtained. The light can be refracted and changed according to the application angle of 10.

The illumination angle can be changed, so that it matches the place of use of the luminaire and its use . For example, in the case of a luminaire for ceiling mounting , the luminous flux is concentrated brightly around the bottom by focusing the light beam downward, and the illumination for wall mounting In the case of fixtures, by illuminating the light beam from the wall surface at a wide angle, it can be selected as illumination that illuminates the entire front surface from the wall surface by dispersing the amount of light and reducing glare , and a wider or narrower (directivity) viewing angle By irradiating with, it is selected so as to obtain appropriate illumination efficiently according to the place of use and its application .

  The V-shaped groove 10 may be formed in a predetermined shape such as a curved surface, or the inner angle of 70 to 120 ° may be appropriately changed regardless of the angle according to the use situation. The illustration is omitted.

  Thus, in the embodiment of the light transmissive diffuser cover 1a formed integrally with the light transmissive diffuser filter 1 and the illumination cover 9 shown in FIG. The flange 12 is provided with socket portions 13 for supplying power to both ends thereof, and is provided with a base 14 and LEDs 15, 15,... Arranged in two rows on the base 14, and on the front side of the LEDs 15, 15,. The light transmission diffuse cover 1a is formed as an integral cylindrical cover by disposing a heat sink 16 on the back side, and heat generated from the LEDs 15, 15,... It is provided so that heat can be radiated to the outside via

Then, the point light sources in which the LEDs 15, 15,... Shown in FIG. 8 are arranged in two rows are scattered by the light transmission diffuse cover 1a, thereby erasing the light source image connected to the points of the point light source, entire light transmitting diffuser cover 1a is a whole as in the conventional fluorescent Kan light brightly, as illumination light in place of a conventional fluorescent Kan, LED unique power saving, used as a high illumination but the further transmission in the long life To do.

Also, as in the embodiment of a lighting Kan 12a shown in FIG. 9, the light transmission diffuser cover 1aa is substantially the same as the light-transmitting diffuser filter 1, LED15,15, Rutotomoni beam image is diffuse light and ... point light sources of As indicated by the arrows, for example, by using a groove 10a (70 °) formed at a small required angle of about 70 °, the illumination angle is widened and the light is refracted and diffused to a wide angle, thereby illuminating light such as a wall lamp. It is used to brightly illuminate the entire wall .

Furthermore, like the lighting rod 12b of the other embodiment of FIG. 10 , the light transmission diffuse cover 1ab is formed with a groove portion 10b bent at a wide angle opposite to the groove portion 10a of FIG. With the groove 10b (120 °) formed at a required angle of about 120 °, light is refracted at a narrow angle and the irradiation angle is converged so that illumination light is irradiated from the outer surface of the light transmission diffuse cover 1a. It is used for ceiling lights, etc. to concentrate the light and illuminate a predetermined direction such as down .

The light transmission diffuse filter for illuminating lamp or the cover of the illuminating lamp of the present invention includes a lighting fixture for home appliances, a light source for scanning (light source for general-purpose copy / scanner and scanner light source for product inspection), a moving body (automobile, railway) It can be used as a filter or illumination light cover for improving color rendering properties and changing the irradiation angle using LEDs, such as lighting parts.

1 light transmissive diffuser filter 2 translucent resin 3 silica glass particles 4 light diffusing material 5 impurity components 5a alumina _{(Al 2 O} 3)
5b Titanium dioxide (TiO ₂ )
5c Iron oxide (Fe ₂ O ₃ )
6 Color rendering property improving material 6a Red type particle 6b Green type particle 6c Fluorescent particle 7 Adhering material 8 Linear light source 9 Illumination cover 10 Groove part 11 Light transmission diffuse cover 12 Illumination lamp 15 LED

Claims (6)

  Quartz glass fine particles and titanium dioxide so that the light of the light source image can be diffused and disappeared by passing through the light transmission diffuser filter. A light transmissive diffuser filter for illumination lamps, characterized in that it is formed as a light transmissive diffuser filter in which a light diffusing material such as silica or calcium is uniformly dispersed in a translucent resin.   The particle size of the quartz glass fine particles of the light transmissive diffuser filter is about 1 to 30 μm in average particle size, the content is 0.01 to 5% by weight, and the content of light diffusing material such as titanium dioxide, silica and calcium is included. The light transmission diffuse filter for an illuminating lamp according to claim 1, wherein the weight ratio is 0.01 to 2%. At least one kind of impurity components such as Al ₂ O ₃ , TiO ₂ , Fe ₂ O ₃ , Nb ₂ O ₅ , ZrO ₂ , MnO _2, and MoO ₂ can be diffused into the silica glass fine particles so that light can be scattered inside the silica glass fine particles. 3. The composition according to claim 1, wherein a component containing a metal element is contained, and the total amount of the silica glass fine particles is 100% by mass, and is 0.01 to 2% by mass in terms of oxide of each element. Light transmission diffuser filter for illuminating lamps.   A color rendering property improving material combining a coloring material of a dye or pigment such as red or a fluorescent material or a fluorescent material on the outer surface of the quartz glass fine particles uniformly divided into the translucent resin or the translucent resin or both. 4. The light transmission / scattering filter for illuminating lamps according to any one of claims 1 to 3, wherein the silica glass fine particles are dispersed in a light-transmitting resin.   A light transmission diffuser filter and a cover part such as a fluorescent lamp-shaped illuminating lamp having a straight or annular shape having an LED module are integrally formed as a light transmission diffuser cover, or a light transmission diffuser filter is provided inside the transparent cover. The light transmission diffuse filter for illumination lamps as described in any one of Claims 1-4 characterized by the above-mentioned.   A groove portion having a predetermined shape such as a V shape or a curved surface on the light source side of the light transmission diffuse filter or the light transmission diffuse cover and having an inner angle of about 70 to 120 ° so that the illumination angle of the illumination light can be changed. The light transmission / scattering filter for illumination lamps according to claim 5, wherein a large number of are formed in the longitudinal direction.

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