JP6256528B2 - lighting equipment - Google Patents

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting element such as an LED as a light source.

  2. Description of the Related Art Conventionally, in a general residential lighting fixture, an annular fluorescent lamp is used as a main light source, and a cover member (sade) is provided so as to cover the lower side of the annular fluorescent lamp, so that the external shape is configured in a round shape. Things are prevalent.

  On the other hand, in recent years, with the increase in output, efficiency, and widespread use of light emitting elements such as LEDs, lighting fixtures for general housing that can be expected to have a long life using light emitting elements as light sources have been developed.

Sharp / LED Ceiling Light [Search May 27, 2011] (http://www.sharp.co.jp/corporate/news/100819-a-2.html)

  However, in the lighting fixture as described above, a light emitting element that emits white light is used as a light source. In this case, since the light color is limited to white, the range of light colors that can be expressed is narrow, and the rendering performance is high. The problem that it is inferior to arises.

  The present invention has been made in view of the above problems, and provides a lighting apparatus that can improve rendering performance and can reduce unevenness in color and brightness of a cover member to achieve uniform chromaticity and brightness. The purpose is to do.

A lighting fixture according to an embodiment of the present invention includes: a substrate having an opening formed in the center; a plurality of light emitting elements that emit white light mounted in a plurality of rows in a direction surrounding the opening of the substrate; A plurality of light emitting elements that emit light other than white, disposed on the same substrate as the plurality of light emitting elements, and disposed between rows of the light emitting elements emitting white light; the light emitting elements emitting white light and the light emitting light other than white light A lens disposed corresponding to the plurality of light emitting elements, and a diffusing cover member disposed to cover the substrate and the front surface side of the lens, and emits light other than the white light The plurality of light emitting elements that emit white light are more mounted than the plurality of light emitting elements .

  According to the embodiment of the present invention, it is possible to provide a lighting apparatus that can improve performance, reduce color unevenness and brightness unevenness of a cover member, and achieve uniform chromaticity and brightness. .

It is a perspective view which shows the lighting fixture which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the same lighting fixture. It is a top view which shows the lighting fixture seeing from the downward direction. It is a top view which shows the light source part in the same lighting fixture. It is a top view which shows the light source part which concerns on the 2nd Embodiment of this invention. It is a fragmentary sectional view showing the lighting fixture concerning a 3rd embodiment of the present invention. It is a fragmentary sectional view showing the lighting fixture concerning a 4th embodiment of the present invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In each drawing, the wiring connection relationship using lead wires or the like is omitted. In addition, the same code | symbol is attached | subjected to the same part and the overlapping description is abbreviate | omitted.

  In configuring the present embodiment, various experiments and evaluations were performed in order to achieve uniform performance, chromaticity of the cover member, and luminance, and a suitable configuration was pursued. This embodiment shows the result.

  The lighting fixture of the present embodiment is a type that is used by being attached to a hooking sealing body as a wiring fixture installed on the fixture mounting surface, and is used indoors by light emitted from a light source unit having a plurality of light emitting elements. Lighting is performed.

  In FIG. 1 thru | or FIG. 3, the lighting fixture is provided with the main body 1, the light source part 2, the lighting device 3, the attaching part 4, the cover member 5, and the reflecting plate 6. FIG. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument mounting surface is provided. Such a lighting fixture is formed in a round and circular appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

  As representatively shown in FIG. 2, the main body 1 is a chassis, is formed in a substantially circular shape from a flat plate of a metal material such as a cold-rolled steel plate, and has a lighting device 3 and an attachment to be described later at a substantially central portion. A circular recess 11 and an opening 12 for forming the portion 4 are formed.

  As described with reference to FIG. 4, the light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21. The substrate 21 has a predetermined width dimension and is formed in a substantially circle shape. The substrate 21 is made of a glass epoxy resin flat plate as an insulating material, and a wiring pattern is formed of copper foil on the surface side. The light emitting element 22 is electrically connected to this wiring pattern. Further, a white resist layer acting as a reflective layer is laminated on the wiring pattern, that is, on the surface of the substrate 21.

  The material of the substrate 21 can be a ceramic material or a synthetic resin material when an insulating material is used. Furthermore, when it is made of a metal having thermal conductivity, a metal base substrate in which an insulating layer is laminated on one surface of a base plate excellent in heat dissipation such as aluminum can be applied.

  Further, the substrate 21 may be formed in a circle shape as a whole so as to connect the substrates divided into a plurality.

  The light emitting element 22 is an LED, which is a surface mount type LED package. A plurality of LED packages are mounted in a plurality of rows along the circumferential direction of the circle-shaped substrate 21, in the present embodiment, in three rows on the circumference of substantially concentric circles having different radii. That is, it is mounted over the inner circumferential row, the outer circumferential row, and an intermediate row between the inner circumferential row and the outer circumferential row.

  The LED package is roughly composed of an LED chip disposed in a main body formed of ceramics or synthetic resin, and a translucent resin for molding such as epoxy resin or silicone resin that seals the LED chip. It is configured.

  As the LED packages mounted on the inner circumferential row and the outer circumferential row, those that emit white light (N) are used. The LED chip is an LED chip that emits blue light. The translucent resin is mixed with a phosphor, and in order to be able to emit white light, a yellow phosphor that mainly emits yellow light having a complementary color relationship with blue light is used. ing.

  A plurality of LED packages mounted in the inner circumferential row and the outer circumferential row are mounted such that adjacent LED packages are arranged on the circumference with a substantially equal spacing. Specifically, 50 LED packages are mounted on both the inner peripheral row and the outer peripheral row. The white color includes so-called daylight color (D), daylight white color (N), white color (W), and light bulb color (L).

  For the LED packages mounted in the middle row, for example, those emitting light other than white, for example, red (R), green (G), and blue (B) are used. Accordingly, the LED chips are LED chips that emit red, green, and blue light, respectively, and these LED chips are sealed with a translucent resin for molding.

  The LED package that emits light other than white is not limited to those that emit light in red (R), green (G), and blue (B), and those that emit light in purple or yellow may be applied.

  The LED packages that emit red (R), green (G), and blue (B) are sequentially arranged on the circumference in the order of red (R), green (G), and blue (B). . Specifically, it is preferable that the number is the same for each color, and in the present embodiment, 17 are used for each color, for a total of 51.

  Further, the adjacent LED packages are arranged on the circumference at a constant arrangement pitch P with a substantially equal spacing. Specifically, the arrangement pitch P is set to 12 mm.

  Furthermore, white (N) light emitting LED packages mounted on the inner and outer rows and red (R), green (G), and blue (B) LEDs mounted on the middle row. In relation to the LED package, the circumference in which the white (N) light emitting LED package is arranged and the circumference in which the red (R), green (G), and blue (B) light emitting LED packages are arranged. The distance difference Dd in the radial direction is the same on the inner peripheral side and the outer peripheral side. Specifically, the distance difference Dd is set to 30 mm.

  The arrangement of red (R), green (G), and blue (B) in the LED package is not specified and may be in any order. For example, the arrangement is in the order of green (G), red (R), and blue (B). May be. Further, adjacent LED packages are preferably arranged with different emission colors, but are not particularly limited. As an example, it is possible to continuously arrange two same colors such as red (R), red (R), green (G), green (G), blue (B), and blue (B). is there.

  A plurality of light emitting elements 22 that emit white light (N) are arranged in a row on substantially concentric circles having different radii as described above, and are on the circumference of a circle having substantially the same center as the circle, A plurality of light emitting elements 22 that emit red (R), green (G), and blue (B) light are arranged between the light emitting elements 22 that emit white (N) light.

  Therefore, since the light emitting elements 22 that emit red (R), green (G), and blue (B) are provided, the presentation performance is improved, and the white (N) light emitting elements 22 with good luminous efficiency are provided. Between the red (R), green (G), and blue (B) light emitting elements 22 having low luminous efficiency, the light emission uniformity can be secured as a light source.

  Incidentally, it is known that the maximum visual sensitivity has a wavelength of 555 nm. As the visual sensitivity is higher, it is possible to feel brightness with less radiant energy. For this reason, the closer the wavelength is to 555 nm, the larger the luminous flux and the higher the light emission efficiency.

  Therefore, red (R) and blue (B) have low wavelengths because the wavelengths are not near 555 nm and are separated, and green (G) has a wavelength near 555 nm, but the conversion efficiency to light is low. The light emission efficiency is low because the light emission is low, and the red (R), green (G), and blue (B) light emitting elements 22 are disposed so as to be sandwiched between the white (N) light emitting elements 22 to emit light. The uneven output can be reduced due to the difference in efficiency, and the uniformity of light emission can be secured as a light source.

  In the light source unit 2 configured as described above, as representatively shown in FIGS. 2 and 3, the substrate 21 is positioned around the mounting unit 4, and the mounting surface of the light emitting element 22 is the front side, that is, the lower side. Are arranged in the direction of irradiation. Moreover, it attaches by fixing means, such as a screw | thread, so that the back surface side of the board | substrate 21 may closely_contact | adhere to the inner surface side of the main body 1. FIG. Therefore, the substrate 21 is thermally coupled to the main body 2, and heat from the substrate 21 is conducted from the back surface side to the main body 2 to be dissipated.

  As shown in FIGS. 2 and 3, the lighting device 3 includes a substantially short cylindrical case, a circuit board 31 mounted and accommodated in the case, and circuit components mounted on the circuit board. ing. The lighting device 3 is disposed and attached to a concave portion 11 formed in the central portion of the main body 1, and the adapter A side is electrically connected and connected to a commercial AC power source via the adapter A. Therefore, the lighting device 3 receives this AC power supply, generates a DC output, and passes through the lead wire.

The direct current output is supplied to the light emitting element 22, and the light emitting element 22 is controlled to be turned on.

  The attachment portion 4 is an adapter guide formed in a substantially cylindrical shape, and an engagement port through which the adapter A is inserted and engaged is provided at the center portion of the adapter guide. The adapter guide is disposed such that the outer peripheral surface thereof is located on the inner peripheral side of the case of the lighting device 3, in other words, the lighting device 3 is disposed on the outer peripheral side of the adapter guide. It has become. The adapter guide extends through the opening 12 of the main body 1 to the front side.

  Note that the attachment portion 4 is not necessarily a member referred to as an adapter guide or the like. For example, it may be an opening formed in the main body 1 or the reflection plate 6, and in short, means a member or a portion that is opposed to the hooking sealing body Cb as a wiring device and to which the adapter A is engaged. .

  The cover member 5 is made of a translucent material such as an acrylic resin and has a milky white diffusive material. The cover member 5 has a circular base 51 formed in a gentle curved surface, and the base 51 And a side edge portion 52 extending obliquely from the outer periphery to the inner peripheral direction. And the cover member 5 is attached to the outer periphery part of the main body 1 so that the front side of the main body 1 including the light source part 2 may be covered.

  Specifically, the cover member 5 covers the light emitting element 22 with a predetermined separation distance H, and the separation distance H is set to 50 mm. In this case, the separation distance H can be based on the average separation distance H. As will be described later, the chromaticity and brightness of the cover member 5 can be made uniform by suitably designing the relationship between the separation distance H, the arrangement pitch P, and the spacing difference Ds described above. The objective can be achieved.

  Further, it is desirable that the cover member 5 is formed so as to provide a light distribution characteristic in which the dispersion degree of the emitted light, that is, the 1/2 beam angle is in the range of 10 degrees to 50 degrees when parallel light is incident. .

  As shown in FIG. 2, the reflecting plate 6 is formed in a circular shape having an inclined reflecting surface 61 from a flat plate of a metal material such as a cold rolled steel plate, and is used for operating the adapter A at a substantially central portion. An opening is formed. Therefore, a part of the light emitted from the light emitting element 22 is reflected to the front side by the reflecting surface 61 and is effectively used.

The adapter A is electrically and mechanically connected to a hooking sealing body Cb installed on the ceiling surface C by a hooking blade provided on the upper surface side, and has a substantially cylindrical shape. Is provided so that it always protrudes to the outer peripheral side by a built-in spring. The locking portion A1 is immersed by operating a lever provided on the lower surface side. Further, a power cord (not shown) connected to the lighting device 3 is led out from the adapter A, and is connected to the lighting device 3 via a connector.

  Next, the attachment state to the ceiling surface C of a lighting fixture is demonstrated. As shown in FIG. 2, the hanging ceiling body Cb is installed on the ceiling surface C. The adapter A is electrically and mechanically connected to the hooking sealing body Cb. From this state, as shown by the arrow in the figure, the fitting body 4 is adjusted until the engaging portion A1 of the adapter A is securely engaged with the engaging port of the adapter guide while aligning the engaging port of the adapter guide as the mounting portion 4 with the adapter A. Push up from below to perform the mounting operation.

  Further, when removing the instrument main body, it can be removed by removing the cover member 5 and operating the lever provided on the adapter A to disengage the engaging portion A1 of the adapter A.

  In the realization of the lighting fixture as described above, the following preferable configuration and preferable values could be found.

  (1) A plurality of light emitting elements 22 that emit white light (N) are arranged in a row on substantially concentric circles having different radii, and are arranged on a circumference of a circle having substantially the same center as the circle, By arranging a plurality of light emitting elements 22 that emit red (R), green (G), and blue (B) in a row between the light emitting elements 22 that emit white (N) light, each of these lights The light mixture of the color light emitting elements 22 becomes good, and it is possible to improve the rendering performance of the light emitted from the light emitting elements 22, and to reduce the unevenness of color and brightness of the cover member, and to make the chromaticity and brightness uniform. be able to.

  (2) The arrangement pitch of the plurality of light emitting elements 22 that emit red (R), green (G), and blue (B) is P (mm), and the distance between the light emitting elements 22 and the cover member 5 is H ( mm), by setting so as to satisfy the relationship of P ≦ H / 3, it is possible to suppress color unevenness and luminance unevenness and improve uniformity. This is because when the arrangement pitch P of the light emitting elements 22 is larger than a predetermined distance with respect to the separation distance H, the graininess due to the luminance of the light emitting elements 22 is conspicuous, the light mixture is not performed well, and color unevenness and brightness unevenness occur. Means.

  In the present embodiment, specifically, the arrangement pitch P is 12 mm, the separation distance H is 50 mm, and the relationship of P ≦ H / 3 is satisfied.

  (3) A circumference where a plurality of light emitting elements 22 that emit white (N) are arranged, and a plurality of light emitting elements 22 that emit red (R), green (G), and blue (B) are arranged. When the difference in the radial direction from the circumference is Dd (mm) and the distance between the light emitting element 22 and the cover member 5 is H (mm), the relationship is set so that Dd ≦ 0.5 × H + 15 mm. Accordingly, it is possible to improve uniformity by suppressing color unevenness and brightness unevenness. This means that when the distance difference Dd becomes larger than the predetermined distance H with respect to the separation distance H, light mixing of the light emitting elements 22 between the columns is not performed well, and uneven color and uneven brightness occur.

  Specifically, in the present embodiment, the separation distance H is 50 mm, the distance difference Dd is 30 mm, and the relationship of Dd ≦ 0.5 × H + 15 mm is satisfied.

  (4) Since the same number of light emitting elements 22 that emit red (R), green (G), and blue (B) are used and arranged in the same number, red (R), green (G), Mixing of light colors of the plurality of light emitting elements 22 that emit blue (B) is good, and unevenness in color is suppressed, so that uniformity can be improved.

  In the present embodiment, specifically, the same number of 17 light emitting elements 22 that emit red (R), green (G), and blue (B) are used.

  When power is supplied to the lighting device 3 in a state where the lighting fixture is attached to the ceiling surface C, the light emitting elements 22 are energized through the substrate 21 and the light emitting elements 22 are turned on. The light emitted from the light emitting element 22 passes through the diffusing cover member 5 and is irradiated outward. In this case, the light mixture of the light emitting elements 22 of the respective light colors becomes good, and the color unevenness and luminance unevenness of the cover member can be reduced, and the chromaticity and luminance can be made uniform.

  In addition, since the substrate 21 is positioned around the mounting portion 4 and the mounting surface of the light emitting element 22 is disposed toward the front surface side, the configuration can be simplified. A heat dissipation structure for radiating heat can be easily configured. For example, as in the present embodiment, a configuration in which the back surface side of the substrate 21 is thermally coupled to the main body 1 and heat from the substrate 21 is conducted to the main body 21 to dissipate heat can be easily realized. Thereby, the temperature rise of the light emitting element 22 can be suppressed.

  The lighting device 3 is disposed on the outer peripheral side of the mounting portion 4, and the substrate 21 is located around the mounting portion 4, and the back side is thermally coupled to the main body 1. Mutual thermal interference between the generated heat and the heat generated from the light emitting element 22 is reduced, and the temperature rise of the light emitting element 22 can be effectively suppressed.

  In addition, since the light emitting element 22 uses white (N), red (R), green (G), and blue (B) having different light colors, the outputs of the light emitting elements 22 are appropriately changed and mixed. Thus, the range of light colors that can be expressed can be widened.

  In the above embodiment, the light emitting elements 22 are arranged in rows on substantially concentric circles having different radii. However, polygons having different sizes, for example, hexagonal rows, are arranged. The light emitting element 22 may be disposed by forming the above.

  That is, a plurality of light emitting elements 22 that emit white light are arranged in a row on a polygonal circumference that has substantially the same center of different size, and the polygonal circumference that has the same center as the polygon is arranged on the circumference. In this case, a plurality of light emitting elements that emit red (R), green (G), and blue (B) light may be disposed between the light emitting elements 22. Even in such a form, the same effect as described above can be obtained.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 shows the plane of the light source unit 2 as in FIG. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In this embodiment, the board | substrate 21 is arrange | positioned so that the four board | substrates 21 of circular arc shape with a predetermined | prescribed width dimension may be joined, and is formed in the substantially circle shape as a whole. That is, the substrate 21 formed in a substantially circle shape as a whole is composed of four divided substrates 21.

  By using the substrate 21 thus divided, it is possible to suppress the deformation of the substrate 21 by absorbing thermal contraction at the divided portion of the substrate 21.

  As the LED packages mounted on the inner circumferential row and the outer circumferential row, those that emit white light are used. Specifically, the light emitting colors are day white (N) and light bulb color (L), which are alternately arranged, and the adjacent light emitting elements 22 in each column are substantially equal. They are arranged at intervals.

  In addition, the LED packages mounted in the middle row are those that emit light in red (R), green (G), and blue (B) as in the first embodiment.

  Accordingly, a plurality of light emitting elements 22 that emit white light (day white (N), light bulb color (L)) in a row on the circumference of substantially concentric circles having different radii are disposed, and have substantially the same center as the circle. A plurality of light emitting elements 22 that emit light in red (R), green (G), and blue (B) in a circle between the light emitting elements 22 that emit light in white (N). It is arranged. For this reason, it is possible to reduce the color unevenness and luminance unevenness of the cover member and to make the chromaticity and luminance uniform.

  Similarly to the first embodiment, the arrangement pitch of the plurality of light emitting elements 22 that emit red (R), green (G), and blue (B) is P (mm), and the light emitting elements 22 and the cover member are arranged. By setting the distance to be H (mm), the relationship of P ≦ H / 3 can be set to suppress color unevenness and luminance unevenness and improve uniformity.

  Furthermore, the circumference | surroundings in which the several light emitting element 22 light-emitted in daylight white (N) and light bulb color (L) was arrange | positioned, and the several light emitting element light-emitted in red (R), green (G), and blue (B). When the distance difference in the radial direction from the circumference on which 22 is disposed is Dd (mm) and the distance between the light emitting element 22 and the cover member is H (mm), the relationship is Dd ≦ 0.5 × H + 15 mm. By setting so as to be uniform, it is possible to improve uniformity by suppressing color unevenness and brightness unevenness.

  Furthermore, since the same number of light emitting elements 22 that emit red (R), green (G), and blue (B) are used and arranged in the same number, red (R), green (G), Mixing of light colors of the plurality of light emitting elements 22 that emit blue (B) is good, and unevenness in color is suppressed, so that uniformity can be improved.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a cross section of the left half of the luminaire. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In the present embodiment, the LED package mounted in the outer peripheral row, that is, the LED package mounted in the outermost peripheral row, includes an LED package that emits light at least in the lateral direction as indicated by the arrows in the drawing. It is used.

  Therefore, according to the present embodiment, in addition to the same effects as those of the first embodiment, the amount of light emitted from the outer periphery and the upper side of the cover member 5 can be increased. For example, the ceiling surface is brightened and brightened. It is possible to improve the feeling of feeling.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a cross section of the left half of the luminaire. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In the present embodiment, the LED package substrates 21 mounted in the inner circumferential row, the middle row, and the outer circumferential row are each a separate substrate, and are divided substrates, and the LED packages are arranged on a polygonal circumference. Is arranged. Further, the main body 2 is tapered, and the substrate 21 is attached to the slope.

  Therefore, the light emitted from the LED packages arranged in the inner row is directed inward, and the light emitted from the LED packages arranged in the outer row is directed outward. Become. For this reason, it becomes possible to widen the light distribution range.

  As described above, according to the present embodiment, it is possible to provide a lighting apparatus capable of widening the light distribution range in addition to the same effects as those of the first embodiment.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, the substrate is preferably formed in a circular circle shape or a hexagonal or octagonal polygonal shape, but is not limited to this shape. In short, the shape of the substrate is not particularly limited as long as the light emitting elements can be arranged on a circumference or a polygonal circumference. Further, the substrate may be divided into a plurality of parts and may be configured as a whole by combining them, or may be configured as a whole.

  Further, in order to improve the uniformity of the light emitted from the light emitting element, it does not hinder the provision of a diffusion lens corresponding to the light emitting element or the provision of light transmittance control means on the cover member.

  Furthermore, for example, three rows of light emitting elements that emit white light may be arranged, and two rows of light emitting elements that emit red, green, and blue light may be arranged between the rows. As the light emitting element, a solid light emitting element such as an LED can be applied. In this case, the number of light emitting elements and the number of columns are not particularly limited.

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Light source part, 3 ... Lighting apparatus, 4 ... Mounting part (adapter guide), ... Cover member, 6 ... Reflector plate, 21 ... Substrate, 22 ... Light emitting element (LED), C ... Appliance mounting surface (ceiling surface), Cb ... Wiring appliance (hook ceiling body) H ... Separation distance, P ... Arrangement of light emitting device Pitch, Ds ... Distance difference

Claims (1)

A substrate having an opening in the center;
A plurality of light emitting elements emitting white light mounted in a plurality of rows in a direction surrounding the openings of the substrate;
A plurality of light emitting elements emitting light other than white disposed on a same substrate as the plurality of light emitting elements emitting white light and disposed between rows of the light emitting elements emitting white light;
A plurality of light emitting elements emitting white light and a lens disposed corresponding to the plurality of light emitting elements emitting light other than white;
A diffusive cover member disposed so as to cover the substrate and the front side of the lens ;
The lighting apparatus according to claim 1, wherein the plurality of light emitting elements emitting white light has a larger mounting number than the plurality of light emitting elements emitting light other than white .

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