JP2019046813A - Luminaire - Google Patents

Abstract

To provide a luminaire that can improve a rendering property.SOLUTION: A luminaire comprises: a main body 1; a circular board 21 in which an opening part is formed at a center, and on which a plurality of light emitting elements 22 are mounted; a plurality of light emitting elements 22 mounted so as to surround the opening part of the board 21, and for emitting light in white; and a plurality of light emitting elements 22 mounted so as to surround the opening part of the board 21, and for emitting light in a color other than white. The plurality of light emitting elements 22 for emitting light in white are mounted on an inner peripheral side and an outer peripheral side of the plurality of light emitting elements 22 for emitting light in the color other than white, and light from light emitting elements 22 mounted at an outermost periphery on the outer peripheral side is emitted at least in a lateral direction.SELECTED DRAWING: Figure 6

Description

  An embodiment of the present invention relates to a luminaire using a light emitting element such as an LED as a light source.

Conventionally, in a luminaire for general housing, an annular fluorescent lamp is used as a main light source, and a cover member (sade) is provided to cover the lower side of the annular fluorescent lamp, and the external shape is configured in a round shape. Things are widespread.

On the other hand, with the recent trend toward higher output, higher efficiency, and widespread use of light emitting elements such as LEDs, lighting fixtures for general houses have been developed which can be expected to have longer life by using the light emitting elements as light sources.

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

However, in the above-described lighting apparatus, 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. The problem of being inferior to

  This invention is made in view of the said subject, and it aims at providing the lighting fixture which can improve performance.

  A luminaire according to an embodiment of the present invention comprises: a main body; a circular substrate having an opening formed at the center and a plurality of light emitting elements mounted thereon; and white light emitted so as to surround the opening of the substrate And a plurality of light emitting elements emitting light other than white mounted so as to surround the opening of the substrate, and the plurality of light emitting elements emitting light in white emit light other than the white The light from the light emitting elements mounted on the inner peripheral side and the outer peripheral side of the plurality of light emitting elements to be mounted, and mounted on the outer peripheral side and on the outermost periphery, is at least emitted in the lateral direction. .

  According to the embodiment of the present invention, it is possible to provide a luminaire that can improve the effect.

It is a perspective view showing a lighting fixture concerning a 1st embodiment of the present invention. It is a sectional view showing the lighting fixture. It is a top view which looks at the same lighting appliance from the lower part. 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 a lighting fixture concerning a 3rd embodiment of the present invention. It is a fragmentary sectional view which shows the lighting fixtures which concern on the 4th Embodiment of this invention.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In each figure, the wiring connection relationship by the lead wire etc. is omitted and shown. In addition, the same code | symbol is attached | subjected to an identical part and the duplicate description is abbreviate | omitted.

In forming the present embodiment, various experiments and evaluations were conducted to pursue realization of a suitable configuration in order to equalize the rendering effect, the chromaticity of the cover member, and the luminance. The present embodiment shows the result.

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

In FIG. 1 to FIG. 3, the lighting apparatus includes a main body 1, a light source unit 2, a lighting device 3, and an attaching unit 4.
, The cover member 5, and the reflection plate 6. Moreover, the adapter A electrically and mechanically connected to the hooking sealing body Cb installed in the ceiling surface C as an instrument attachment surface is provided. Such a luminaire is formed in a round circular appearance, with the front side as the light irradiation surface and the rear side as the attachment surface to the ceiling surface C.

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

The light source unit 2 includes a substrate 21 and a plurality of light emitting elements 22 mounted on the substrate 21 as described with reference to FIG. 4. The substrate 21 has a predetermined width dimension and is formed substantially in a circle, and is made of a flat plate of glass epoxy resin 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 the wiring pattern. In addition, a white resist layer acting as a reflective layer is laminated on the wiring pattern, that is, on the surface of the substrate 21.

In the case of using an insulating material as the material of the substrate 21, a ceramic material or a synthetic resin material can be applied. Furthermore, when it is made of 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 as a whole such that a plurality of divided substrates are joined together.

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

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

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

In the LED packages mounted in the inner row and the outer row, a plurality of adjacent LED packages are mounted circumferentially at substantially equal intervals on the circumference. Specifically, 50 LED packages on the inner side row and 50 LED packages on the outer side row are mounted. In addition, the said white is so-called daylight color (D), daylight white (N), white (W)
And bulb color (L) are included.

The LED package mounted in the middle row emits light other than white, for example, red (
R), green (G), and blue (B) are used. Therefore, 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 one emitting red (R), green (G), and blue (B), and may emit purple or yellow.

The LED packages emitting these red (R), green (G) and blue (B) lights are sequentially arranged on the circumference sequentially with red (R), green (G) and blue (B) . Specifically, it is preferable that the numbers be the same for each color, and in the present embodiment, 17 pieces are used, and a total of 51 pieces are disposed.

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

In addition, white (N) light emitting LED packages mounted in the inner and outer rows and red (R), green (G) and blue (B) light emissions mounted in the middle row In relation to the LED package, the circumference where the white (N) light emitting LED package is disposed, and
The distance difference Dd in the radial direction from the circumference where the R), green (G), and blue (B) light emitting LED packages are disposed is the same on both the inner and outer peripheral sides, specifically, The interval difference Dd is 30 m
It is set to m.

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, arranged in the order of green (G), red (R) and blue (B) May be Moreover, although it is preferable to arrange | position the thing of different luminescent color to an adjacent LED package, it is not exceptionally limited. As an example, red (R), red (R), green (G),
It is also possible to arrange two same colors successively, such as green (G), blue (B) and blue (B).

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

Therefore, since the light emitting elements 22 emitting light in red (R), green (G), and blue (B) are disposed, the rendering performance is enhanced, and the white (N) light emitting elements 22 having good luminous efficiency Between,
Since the red (R), green (G) and blue (B) light emitting elements 22 having low luminous efficiency are disposed, uniformity of light emission can be secured as a light source.

Incidentally, it is known that the maximum visual sensitivity is a wavelength of 555 nm, and the higher the visual sensitivity, the less the radiant energy can be felt the brightness. Therefore, the wavelength is 555 n
The closer to m, the larger the luminous flux and the higher the luminous efficiency.

Therefore, the red (R) and blue (B) wavelengths are not near 555 nm and are separated, so the luminous efficiency is low, while the green (G) is near 555 nm, but the conversion efficiency to light is The luminous efficiency is low because the light emitting element 2 of these red (R), green (G) and blue (B)
By being disposed so as to be sandwiched between the white (N) light emitting elements 22, it is possible to reduce the deviation of the output due to the difference in light emission efficiency and to ensure the uniformity of light emission as a light source .

In the light source unit 2 configured in this manner, as shown in FIG. 2 and FIG. 3 as a representative, the substrate 21 is positioned around the mounting portion 4 and the mounting surface of the light emitting element 22 is the front side, that is, the lower side. It is arranged to be directed in the irradiation direction of Further, the substrate 21 is attached by a fixing means such as a screw so that the back surface side of the substrate 21 is in close contact with the inner surface side of the main body 1. Therefore, the substrate 21 is a main body 2
And the heat from the substrate 21 is conducted to the main body 2 from the back side to be dissipated.

As shown in FIGS. 2 and 3, the lighting device 3 includes a substantially short cylindrical case, a circuit board 31 attached and accommodated in the case, and a circuit component mounted on the circuit board. ing. The lighting device 3 is disposed and attached to a recess 11 formed in the central portion of the main body 1, the adapter A side is electrically connected, and the adapter A is connected to a commercial AC power supply.

Therefore, the lighting device 3 receives the AC power to generate a DC output, supplies the DC output to the light emitting element 22 through the lead wire, and controls the lighting of the light emitting element 22.

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 a central portion of the adapter guide. The adapter guide is disposed such that the outer peripheral surface thereof is positioned on the inner peripheral side of the case of the lighting device 3, in other words, the lighting device 3 is arranged on the outer peripheral side of the adapter guide It has become. Moreover, the adapter guide is extended to the front side through the opening 12 of the main body 1.

The mounting portion 4 is not necessarily a member referred to as an adapter guide or the like. For example, the opening may be an opening formed in the main body 1 or the reflection plate 6, and the point is a member or a portion facing the hooking sealing body Cb as a wiring device and with which the adapter A is engaged. .

The cover member 5 is made of a translucent material such as an acrylic resin and is made of a material having a diffusibility to exhibit milky white color, and has a circular base portion 51 formed in a smooth curved surface shape, and the base portion 51. And a side edge 52 extending in the diagonally inner circumferential direction from the outer circumference of The cover member 5 is attached to the outer peripheral edge portion of the main body 1 so as to cover the front side of the main body 1 including the light source unit 2.

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 described later, by suitably designing the relationship between the separation distance H, the disposition pitch P and the spacing difference Ds, the chromaticity and the luminance of the cover member 5 can be made uniform. It is possible to achieve the purpose.

In addition, it is desirable that the cover member 5 be formed so as to provide light distribution characteristics in which the degree of dispersion of emitted light, that is, the half beam angle is in the range of 10 degrees to 50 degrees, when parallel light is incident .

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

The adapter A is electrically and mechanically connected to the hooking sealing body Cb installed on the ceiling surface C by the hooking blade provided on the upper surface side and has a substantially cylindrical shape, and a pair of both sides of the peripheral wall The locking portion A1 is provided so as to always protrude to the outer peripheral side by the built-in spring. The locking portion A1 is adapted to be inserted by operating a lever provided on the lower surface side. Further, a power cord (not shown) connected to the lighting device 3 is derived from the adapter A, and is connected to the lighting device 3 via a connector.

Next, the mounting state of the lighting fixture on the ceiling surface C will be described. As shown in FIG. 2, a ceiling body Cb is installed on the ceiling surface C. Further, an adapter A is electrically and mechanically connected to the hook and seal body Cb. From this state, as shown by the arrow in the figure, while aligning the engagement port of the adapter guide as the mounting section 4 with the adapter A, the instrument body is securely engaged with the engagement port A of the adapter A Perform the mounting operation by pushing it up from below.

Moreover, when removing an instrument main body, the cover member 5 can be removed and it can remove by operating the lever provided in the adapter A and disengaging engagement part A1 of the adapter A. As shown in FIG.

In the realization of the above-mentioned lighting fixture, the following suitable configuration and suitable values could be found.

(1) A plurality of light emitting elements 22 emitting light in white (N) are arranged in a row on the circumference of substantially concentric circles different in radius, and the circumference of a circle having the same center as the circle, By arranging a plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) in a row between the rows of light emitting elements 22 emitting light in white (N), each of these lights is arranged The mixed light of the light emitting element 22 of the color becomes good, and the effect of the light emitted from the light emitting element 22 can be improved, and the color unevenness of the cover member,
Uneven luminance can be reduced to achieve uniform chromaticity and luminance.

(2) The disposition pitch of the plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) is P (mm), and the separation distance between the light emitting elements 22 and the cover member 5 is H (H By setting the relationship of P ≦ H / 3 when mm), it is possible to suppress color unevenness and luminance unevenness and improve uniformity. This is that when the disposition pitch P of the light emitting elements 22 is larger than a predetermined distance H by a predetermined amount or more, graininess due to the luminance of the light emitting elements 22 is noticeable, light mixing is not performed well, and color unevenness and luminance unevenness occur. Means.

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

(3) A periphery on which a plurality of light emitting elements 22 emitting light in white (N) are arranged, and a plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) are arranged Assuming that the distance between the light emitting element 22 and the cover member 5 is H (mm), and the distance between the light emitting element 22 and the cover member 5 is H (mm), the relationship of Dd ≦ 0.5 × H + 15 mm is set. As a result, it is possible to suppress color unevenness and luminance unevenness and improve uniformity. This is because the distance difference D with respect to the separation distance H
When d is larger than a predetermined value, mixed light of the light emitting elements 22 between the respective rows is not satisfactorily performed, which means that color unevenness and luminance unevenness occur.

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

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

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

When power is supplied to the lighting device 3 in a state where the lighting fixture is attached to the ceiling surface C, the substrate 2
The light emitting elements 22 are energized through 1 and light is emitted. The light emitted from the light emitting element 22 passes through the diffusive cover member 5 and is emitted outward. In this case, the mixed light of the light emitting element 22 of each light color becomes good, the color unevenness of the cover member and the brightness unevenness are reduced, and the chromaticity, chromaticity,
It becomes possible to improve the uniformity of the luminance.

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

Since 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 surface side is thermally coupled to the main body 1, from the lighting device 3 The 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, the light emitting elements 22 are white (N), red (R), green (G), blue (
Since B) is used, it is possible to widen the range of expressible light colors by changing these outputs appropriately and mixing light.

In the above-described embodiment, the light emitting elements 22 are arranged in a row on the circumference of approximately concentric circles having different radii.
The light emitting elements 22 may be arranged in a row on the circumference of a polygon having different sizes, for example, a hexagonal shape.

That is, a plurality of light emitting elements 22 emitting white light are arranged in a row on the circumference of a polygon having substantially the same centers of different sizes, and the circumference of the polygon having the same center as that of the polygon Alternatively, a plurality of light emitting elements emitting light in red (R), green (G), and blue (B) may be disposed between the light emitting elements 22 in a row. In the case of such a configuration, it is possible to obtain the same effect as described above.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 shows a plane of the light source unit 2 as in FIG. The same or corresponding portions as in the first embodiment are denoted by the same reference numerals, and duplicate descriptions will be omitted.

In the present embodiment, the substrate 21 is disposed so that four arc-shaped substrates 21 having a predetermined width dimension are joined together, and formed in a substantially circular shape as a whole. That is, the substrate 21 formed in a substantially circular shape as a whole is configured of four divided substrates 21.

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

An LED package that emits white light is used for the LED packages mounted in the inner row and the outer row. Specifically, the light emission color used is that of daylight white (N) and that of light bulb color (L), and these are alternately arranged, and the adjacent light emitting elements 22 in each row are approximately equal, etc. It is arranged at intervals.

Further, as the LED packages mounted in the middle row, those emitting light in red (R), green (G) and blue (B) as in the first embodiment are used.

Therefore, white (day white (N), bulb color (N (white)
A plurality of light emitting elements 22 emitting light in L) are disposed, and a row is formed between the lines of the light emitting elements 22 emitting light in the white (N) on the circumference of a circle having the same center as the circle. A plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) are disposed. For this reason, it is possible to reduce color unevenness and brightness unevenness of the cover member, and to achieve uniformity in chromaticity and brightness.

Further, as in the first embodiment, the disposition pitch of the plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) is P (mm), and the light emitting elements 22 and the cover member When H (mm) is set as the separation distance of H, it is possible to suppress color unevenness and brightness unevenness and improve uniformity by setting so as to satisfy the relationship of P ≦ H / 3.

Furthermore, a plurality of light emitting elements emitting light in red (R), green (G), and blue (B), and a circumference on which a plurality of light emitting elements 22 emitting light in neutral white (N) and light bulb color (L) are disposed The distance between the light emitting element 22 and the cover member is H (D (mm)), and the distance between the light emitting element 22 and the cover member is H.
By setting the relationship of Dd ≦ 0.5 × H + 15 mm when mm), it is possible to suppress color unevenness and brightness unevenness and improve uniformity.

Furthermore, the plurality of light emitting elements 22 emitting light in red (R), green (G) and blue (B) are
Since the same number is used and the same number is arranged, red (R), green (G), blue (B)
The mixed light of the light colors of the plurality of light emitting elements 22 emitting light can be improved, the color unevenness can be suppressed, and the uniformity can be improved.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 6 shows the left half of the luminaire in cross section. The same or corresponding portions as in the first embodiment are denoted by the same reference numerals, and duplicate descriptions will be omitted.

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

Therefore, according to the present embodiment, in addition to the same effect as the first embodiment, the cover member 5
It is possible to increase the amount of light emitted from the outer periphery and upper side of the lens, for example, to brighten the ceiling surface to improve the feeling of brightness.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows the left half of the luminaire in cross section. The same or corresponding portions as in the first embodiment are denoted by the same reference numerals, and duplicate descriptions will be omitted.

In the present embodiment, the substrates 21 of the LED packages mounted in the inner row, middle row and outer row are respectively formed as separate substrates and divided substrates, and the LED packages are arranged in rows on the polygonal periphery. It was disposed of. Also, a taper is formed on the main body 2, and the substrate 2 is formed on this slope.
1 is attached.

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

As described above, according to the present embodiment, in addition to the same effects as the first embodiment, it is possible to provide a luminaire that can widen the light distribution range.

The present invention is not limited to the configurations of the above-described embodiments, and various modifications can be made without departing from the scope 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. The point is that the shape of the substrate is not particularly limited as long as the light emitting elements can be arranged on the circumference or on the circumference of a polygon. Furthermore, the substrate may be divided into a plurality of parts, which may be combined to form a whole, or may be integrally formed as a whole.

In addition, in order to improve the uniformity of the light emitted from the light emitting element, it does not prevent providing a diffusion lens corresponding to the light emitting element or providing a light transmittance control means in the cover member.

Furthermore, for example, three rows of light emitting elements emitting white light may be disposed, and two rows of light emitting elements emitting red, green, and blue may be disposed between the rows. The light emitting element is LE
A solid light emitting element such as D can be applied, and 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 device, 4 ... attachment part (adapter guide), 5 ... cover member, 6 ... reflection plate, 21 ... board | substrate , 22: light emitting element (LED), C: appliance mounting surface (ceiling surface), Cb: wiring appliance (hanging sealing body),
H: Separated distance, P: Arrangement pitch of light emitting elements, Ds: Gap difference

Claims (1)

Body and;
A circular substrate having an opening at the center and a plurality of light emitting elements mounted thereon;
A plurality of white light emitting elements mounted so as to surround the opening of the substrate;
A plurality of light emitting elements emitting light other than white mounted so as to surround the opening of the substrate;
The plurality of light emitting elements emitting white light are mounted on the inner peripheral side and the outer peripheral side of the plurality of light emitting elements emitting light other than the white light, and are mounted on the outer peripheral side and the outermost periphery A luminaire characterized in that light from a light emitting element is emitted at least in a lateral direction.

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