JP6933073B2 - Lighting device - Google Patents

Description

An embodiment of the present invention relates to a lighting device.

Lighting devices have been developed that temporarily brighten a room by performing dimming control that further increases the luminous flux while maintaining the color temperature at the maximum value of the luminous flux according to the size of the room.

JP-A-2017-139241

However, since the above-mentioned lighting device does not always obtain brightness that meets the needs of the user, its use is limited.

An object to be solved by the present invention is to provide a lighting device that can obtain a brightness that meets the needs of a user.

The lighting device of the embodiment includes a light source and a lighting control unit. The light source has a plurality of first light emitting elements and a plurality of second light emitting elements having different color temperatures of the output light from the first light emitting element. The lighting control unit has a first mode in which the output light from the light source has a relationship between a predetermined color temperature and a luminous flux, and a second mode having a region discontinuous from the region of the first mode. Controls the lighting of the 1st light emitting element and the 2nd light emitting element.

According to the present invention, it is possible to provide a lighting device that can obtain brightness that meets the needs of a user.

It is a perspective view which shows the lighting apparatus which concerns on embodiment. It is an exploded perspective view which shows the lighting apparatus which concerns on embodiment. FIG. 5 is a schematic plan view showing the lighting device according to the embodiment with the cover member and the lighting device cover removed and viewed from below. It is a block diagram which shows typically an example of the structure of the lighting apparatus which concerns on embodiment. It is a figure which shows an example of the relationship between the color temperature of the output light from the light source which the lighting apparatus which concerns on embodiment has, and a luminous flux.

The lighting device 100 according to the embodiment described below includes a light source 22a and a lighting control unit 91. The light source 22a has a plurality of first light emitting elements 94-1 to 94-n and a plurality of second light emitting elements 95-1 to a plurality of second light emitting elements 95-1 to which the color temperature of the light output is different from that of the first light emitting elements 94-1 to 94-n. It has 95-n. The lighting control unit 91 has a first mode in which the output light from the light source 22a has a relationship between a predetermined color temperature and a luminous flux, and a second mode having a region m2 discontinuous from the region m1 of the first mode. The lighting of the first light emitting element 94-1 to 94-n and the second light emitting element 95-1 to 95-n is controlled according to the above.

Further, the lighting control unit 91 according to the embodiment described below controls so that the luminous flux of the output light in the second mode is higher than the maximum luminous flux of the output light in the first mode.

Further, the color temperature of the second light emitting element 95-1 to 95-n according to the embodiment described below is lower than the color temperature of the first light emitting element, and the color temperature of the second light emitting element 95-1 to 95-n is higher than that of the second light emitting element 95-1 to 95-n. The output is higher in the second mode than in the first mode.

Further, the output light in the second mode according to the embodiment described below has a variable combination of color temperature and luminous flux.

Further, the lighting control unit 91 according to the embodiment described below controls so that the output light when shifting from the first mode to the second mode has the maximum color temperature and the maximum luminous flux in the second mode.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In each figure, the wiring connection relationship by the lead wire or the like may be omitted. The embodiments shown below do not limit the techniques disclosed by the present invention. Further, in the embodiment, the same parts are designated by the same reference numerals, and duplicate description will be omitted.

[Embodiment]
FIG. 1 is a perspective view showing a lighting device according to an embodiment, FIG. 2 is an exploded perspective view showing a lighting device according to an embodiment, and FIG. 3 is a cover member and a lighting device cover removed from the lighting device according to the embodiment. It is a schematic plan view shown from below. The lighting device according to the embodiment is for a general house used by being mounted on a hook ceiling body as a wiring device installed on a mounting surface, and is a light source unit having a plurality of light emitting elements mounted on a substrate. The room is illuminated by the light radiated from.

In FIGS. 1 to 3, the lighting device includes a main body 1, a light source unit 2, a diffusion member 3, a lighting device 4, a lighting device cover 5, a mounting portion 6, and a cover member 7. Further, an adapter A is provided which is electrically and mechanically connected to a hook ceiling body (not shown) installed on the ceiling surface C as a mounting surface. Such a lighting device is formed in a round circular appearance, and the front side is a light irradiation surface and the back side is a mounting surface to the ceiling surface C.

The main body 1 is a chassis formed in a circular shape from a flat plate of a metal material such as a cold-rolled steel plate, and a circular opening for arranging the mounting portion 6 is formed in a substantially central portion thereof. Further, on the outer peripheral side of the flat portion 12 on the inner surface side to which the light source portion 2 is attached, a step portion 13 toward the back surface side is formed to form a gutter-shaped recess 14. Further, an elastic member (not shown) is provided on the back surface side of the main body 1.

The light source unit 2 includes a substrate 21 and a light source 22a mounted on the substrate 21 (the light source 22a is not shown in FIG. 2). The substrate 21 is arranged so that four arc-shaped substrates 21 having a predetermined width dimension are joined to each other, and is formed in a substantially circular shape as a whole. That is, the substrate 21 formed in a substantially circular shape as a whole is composed of four divided substrates 21. These plurality of boards 21 are connected by a connector on the mounting surface. The substrate 21 may be a single substrate having a circular or polygonal shape and having an opening.

The substrate 21 is made of a flat plate of glass epoxy resin (FR-4) which is an insulating material, and a wiring pattern is formed on the surface side by copper foil. Further, a white resist layer acting as a reflective layer is applied on the wiring pattern, that is, on the surface of the substrate 21. When the material of the substrate 21 is an insulating material, a ceramic material or a synthetic resin material can be applied. Further, when it is made of metal, a metal base substrate in which an insulating layer is laminated on one surface of a base plate having good thermal conductivity and excellent heat dissipation such as aluminum can be applied.

The light source 22a is composed of a plurality of light emitting elements. The light emitting element is an LED, which is a surface mount type LED package. The LED packages are mounted in a plurality of rows along the circumferential direction of the plurality of circle-shaped substrates 21, and in the present embodiment, are mounted in two rows on the inner peripheral side and the outer peripheral side. Further, in the LED package, a light emitting element having a neutral white emission color and a light emitting element having a light bulb color are used, and these are arranged alternately, and the adjacent light emitting elements in each row are spaced at approximately equal intervals. Are arranged. Color adjustment is possible by adjusting the current flowing through the neutral white and light bulb color light emitting elements.

An auxiliary light source 22c for a nightlight is mounted on a specific substrate 21 (on the right side in FIG. 3). For this auxiliary light source 22c, the same LED package as the light bulb-colored light emitting element in the main light source (light source 22a) mounted in a circle is used.

The light sources 22a do not necessarily have to be mounted in a plurality of rows. For example, it may be mounted in a row along the circumferential direction. The number and number of rows of the light source 22a can be appropriately set according to the desired output.

The LED package is generally composed of an LED chip arranged on a main body made of ceramics or synthetic resin, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip. It is configured. The LED chip is a blue LED chip that emits blue light. A phosphor is mixed in the translucent resin so that light of neutral white or light bulb color can be emitted.

As for the LED, the LED chip may be mounted directly on the substrate 21, or a bullet-shaped LED may be mounted, and the mounting method and format are not particularly limited.

The diffusion member 3 is a lens member, and is made of, for example, a transparent synthetic resin having an insulating property such as polycarbonate or acrylic resin, and is integrally formed in a substantially circle shape along the arrangement of a plurality of light emitting elements included in the light source 22a. It is arranged so as to cover the entire surface of the substrate 21 on the mounting surface side including the light source 22a.

Further, in the diffusion member 3, two chevron-shaped ridges 31 are formed in the circumferential direction facing the light source 22a on the inner peripheral side portion and the outer peripheral side portion having a substantially circular shape. A U-shaped groove (not shown) is formed inside the ridge portion 31 along the circumferential direction. Therefore, the U-shaped groove is arranged so as to face the plurality of light emitting elements of the light source 22a, and the plurality of light emitting elements of the light source 22a are housed in the U-shaped groove. ing.

Further, a flat portion 33 extending in the width direction is formed from these ridge portions 31, so that the entire surface of the substrate 21 on the mounting surface side is covered.

According to the diffusing member 3 configured in this way, the light emitted from the plurality of light emitting elements included in the light source 22a is diffused and radiated mainly in the inner peripheral direction and the outer peripheral direction on the circumference by the ridge portion 31. Will be done. That is, the light emitted from the plurality of light emitting elements of the light source 22a is mainly diffused and radiated in the radial direction with the circular center where the plurality of light emitting elements of the light source 22a are arranged as the origin. become.

The diffusion member 3 has a different shape from the cross section facing the light source 22a and the cross section facing the auxiliary light source 22c. For example, the cross section facing the light source 22a has a ridge shape in the irradiation direction, and the cross section facing the auxiliary light source 22c has a ridge shape that is flat or has a smaller bulge in the irradiation direction than the cross section facing the light source 22a. May have. Further, the diffusion member 3 may have a flat cross section facing the light source 22a and a raised cross section facing the auxiliary light source 22c. Further, the diffusion member 3 may have a single plate shape that does not have an opening and covers the front surface of the substrate 21 including the opening of the main body.

In the light source unit 2 configured as described above, the substrate 21 is located around the mounting portion 6, and the mounting surface of the light source 22a is arranged so as to face the front side, that is, the downward irradiation direction. Further, the back surface side of the substrate 21 is attached in surface contact with the flat portion 12 on the inner surface side of the main body 1. Specifically, the diffusion member 3 is overlapped from the front surface side of the substrate 21, and the diffusion member 3 is attached to the main body 1 by, for example, a fixing means (not shown) such as a screw, so that the substrate 21 is attached to the main body 1. It is sandwiched between the diffusion member 3 and pressed and fixed. That is, the substrate 21 and the diffusion member 3 are fastened together by one screw.

Therefore, the substrate 21 is thermally coupled to the main body 1, and the heat from the substrate 21 is conducted to the main body 1 from the back surface side and dissipated. The surface contact between the substrate 21 and the main body 1 is not limited to the case where the entire surface of the back surface side of the substrate 21 comes into contact with the main body 1. It may be a partial surface contact.

The lighting device 4 includes a circuit board 41 and circuit components 42 such as a control IC, a transformer, and a capacitor mounted on the circuit board 41. The circuit board 41 is formed in a substantially arc shape so as to surround the periphery of the mounting portion 6, and the adapter A side is electrically connected to the commercial AC power supply via the adapter A. Therefore, the lighting device 4 receives the AC power supply to generate a DC output, supplies the DC output to each light emitting element of the light source 22a via a lead wire, and controls the lighting of the light emitting element.

Such a lighting device 4 is arranged between the mounting portion 6 and the light source portion 2, that is, the substrate 21.

The lighting device cover 5 is formed in a substantially short cylindrical shape by a metal material such as a cold-rolled steel plate, and is attached to the main body 1 so as to cover the lighting device 4. The side wall 51 is inclined so as to expand toward the back surface side, and the front wall 52 is formed with an opening 53 corresponding to the mounting portion 6. Therefore, a part of the light emitted from each light emitting element of the light source 22a is reflected to the front side by the side wall 51 and is effectively used. Further, an arc-shaped guide recess 54 that is concave toward the back surface is formed on the peripheral edge of the opening 53.

The mounting portion 6 is an adapter guide formed in a substantially cylindrical shape, and an engaging port (not shown) through which the adapter A is inserted and engaged is provided in the central portion of the mounting portion 6. The mounting portion 6 is arranged corresponding to the opening formed in the central portion of the main body 1. A base is formed on the outer peripheral portion of the mounting portion 6 so as to project from the outer peripheral portion, and an electrical auxiliary component 62 such as an infrared remote control signal receiving unit and an illuminance sensor is arranged on the base. There is.

The mounting portion 6 does not necessarily have to be a member designated as an adapter guide or the like. For example, it may be an opening formed in the main body 1 or the like, and the point is that it means a member or a portion facing the hook sealing body and to which the adapter A is engaged.

The cover member 7 is formed in a substantially circular shape from a material having a translucent property such as an acrylic resin and having a diffusive property showing a milky white color, and a non-transmissive circular decorative cover 71 is formed in the central portion. Is installed. Further, the decorative cover 71 is formed with a light receiving window 72 having a substantially triangular shape and translucency so as to face the electrical auxiliary component 62. Further, a protruding pin 73 projecting in the inner surface direction is formed near the center of the cover member 7 on the inner surface side.

The cover member 7 is detachably attached to the outer peripheral edge of the main body 1 so as to cover the front surface side of the main body 1 including the light source portion 2. Specifically, by rotating the cover member 7, the cover mounting bracket (not shown) provided on the cover member 7 is attached to the cover receiving bracket 75 arranged in the recess 14 on the outer peripheral edge of the main body 1. It is attached by engaging. Further, the cover member 7 has a position regulating means (not shown) for restricting rotation, and is attached to the main body 1 so that the position of the light receiving window 72 faces the electrical auxiliary component 62.

In the state where the cover member 7 is attached to the main body 1 in this way, the inner surface side of the cover member 7 comes into surface contact with the front wall 52 of the lighting device cover 5. Therefore, it is possible to conduct heat generated from the lighting device 4 and the like to the lighting device cover 5 and further to the cover member 7 to promote heat dissipation.

The adapter A has a substantially cylindrical shape and is electrically and mechanically connected to a hook ceiling body installed on the ceiling surface C by a hook blade provided on the upper surface side, and is connected to both sides of the peripheral wall. A pair of locking portions A1 are provided so as to always project toward the outer peripheral side by a built-in spring. The locking portion A1 is immersive by operating a lever provided on the lower surface side. Further, a power cord to be connected to the lighting device 4 is derived from the adapter A, and is connected to the lighting device 4 via a connector.

When power is supplied to the lighting device 4 in the state of being attached to the ceiling surface C of the lighting device, each light emitting element of the light source 22a is energized via the substrate 21, and each light emitting element is lit. The light emitted from each light emitting element is diffused in the radial direction by the diffusing member 3 and radiated to the front side. The light radiated to the front side passes through the cover member 7 and is radiated to the outside.

Further, a part of the light toward the inner peripheral side in the radial direction is reflected to the front side by the inclined side wall 51 of the lighting device cover 5, and is effectively used.

On the other hand, the heat generated from each light emitting element of the light source 22a is effectively conducted to the main body 1 because the back surface side of the substrate 21 is in surface contact with the main body 1, and is dissipated over a wide area. Further, since a step portion 13 is formed along the outer periphery of the substrate 21 in the vicinity of the outer peripheral side of the substrate 21, the heat dissipation area can be increased by the step portion 13, and the heat dissipation effect on the outer peripheral portion of the main body 1 can be increased. Can be increased. In addition, the stepped portion 13 can exert the reinforcing effect of the main body 1.

Further, since the lighting device 4 is arranged between the mounting portion 6 and the substrate 21, the lighting device 4 is less susceptible to thermal influence from the substrate 21. This is because the heat of the substrate 21 is conducted toward the outer peripheral direction of the main body 1 and tends to be dissipated.

Further, since the cover member 7 is in surface contact with the lighting device cover 5, the heat generated from the lighting device 4 is conducted to the lighting device cover 5 and further conducted to the cover member 7 to dissipate heat. Can be done.

The lighting device according to the embodiment is not limited to the above configuration. For example, a flat partition plate is arranged on the front surface of the lighting device 4 so as to cover the lighting device 4, a substrate 21 is arranged on the front surface of the partition plate, a diffusion member 3 is arranged on the front surface of the substrate 21, and the diffusion member 3 is arranged. The cover member 7 may be arranged so as to cover the entire surface including the cover member 7.

FIG. 4 is a block diagram schematically showing an example of the configuration of the lighting device according to the embodiment. The lighting device 100 according to the embodiment includes a plurality of first light emitting elements and a plurality of second light emitting elements, and can control the color temperature of the first light emitting element and the second light emitting element to their respective limits.

The lighting device 100 includes a control unit 81, a power supply unit 82, a lighting control unit 91, a plurality of first light emitting elements 94-1 to 94-n, and a plurality of second light emitting elements 95-1 to 95-n. The plurality of first light emitting elements 94-1 to 94-n and the plurality of second light emitting elements 95-1 to 95-n are arranged substantially evenly on the LED mounting surface of the light source unit 2, and the lighting device 100 as a whole is arranged. Light source 22a.

The control unit 81 is, for example, a processing device such as a microcomputer. The control unit 81 generates a control signal corresponding to the setting input by the user by, for example, operating the remote controller, and outputs the control signal to the lighting control unit 91. The control signal generated by the control unit 81 is, for example, PWM (Pulse) that controls the output of a plurality of first light emitting elements 94-1 to 94-n and a plurality of second light emitting elements 95-1 to 95-n by pulse modulation. Width Modulation).

The power supply unit 82 converts the AC power supplied from the AC power supply 90 into DC power and outputs it. The AC power supply 90 is, for example, a commercial power supply.

The lighting control unit 91 supplies the direct current supplied from the power supply unit 82 to the plurality of first light emitting elements 94-1 to 94-n and the plurality of second light emitting elements 95-1 to 95-n, and first It controls the lighting of the light emitting elements 94-1 to 94-n and the second light emitting element 95-1 to 95-n.

The lighting control unit 91 includes a first lighting control unit 92 and a second lighting control unit 93. The first lighting control unit 92 and the second lighting control unit 93 control the direct current from the power supply unit 82 according to the control signal generated by the control unit 81, and the plurality of first light emitting elements 94-1 to 94- It is supplied to n and a plurality of second light emitting elements 95-1 to 95-n.

The first light emitting elements 94-1 to 94-n and the second light emitting elements 95-1 to 95-n have different color temperatures of the output light. Specifically, the first light emitting element 94-1 to 94-n outputs white light, for example, light having a color temperature of about 6500 K, and the second light emitting element 95-1 to 95-n is the first light emitting element 95-1 to 95-n. It outputs orange light having a color temperature lower than that of the light emitting elements 94-1 to 94-n, for example, light having a color temperature of about 2000 K. However, the selection of the first light emitting element 94-1 to 94-n and the second light emitting element 95-1 to 95-n is arbitrary as long as the color temperatures of the output lights are different from each other.

Next, an example of the relationship between the color temperature of the light output from the light source 22a and the luminous flux by the dimming and toning control in the lighting device 100 according to the embodiment will be described with reference to FIG. FIG. 5 is a diagram showing an example of the relationship between the color temperature of the output light from the light source 22a and the luminous flux of the lighting device 100 according to the embodiment. In FIG. 5, the horizontal axis is shown as the color temperature (unit: K), and the vertical axis is shown as the luminous flux (unit: lm).

The region m1 surrounded by a line segment connecting the points P1, P2, P3, P4, P5, and P1 in this order is the light output from the light source 22a by the dimming and toning control in the normal mode in the lighting device 100 according to the embodiment. Shows the range of color temperature and luminous flux of. In the normal mode, the lighting device 100 according to the embodiment performs dimming and toning control in a range of color temperature T1 to T6 and luminous flux L1 to L3.

At point P4, the luminous flux of the output light in the normal mode shows the upper limit value L3. The maximum luminous flux of the output light in the normal mode is set so as to fall within the range specified by the Japan Lighting Industry Association according to the number of applicable tatami mats (for example, when the number of applicable tatami mats is 14 tatami mats, 5100 lm to 6100 lm). In the lighting device 100 according to the embodiment, the upper limit of the luminous flux (hereinafter referred to as “maximum luminous flux”) L3 in the normal mode is set to 6100 lm, which is the upper limit of the specified range.

When the applicable number of tatami mats is 14, for example, the color temperature can be set to T1 = 2700K, T5 = 6200K, T6 = 6500K, the luminous flux L1 = 2800lm, etc. It is appropriately determined according to the color temperature and the like of the output light of the first light emitting element 94-1 to 94-n and the second light emitting element 95-1 to 95-n.

Here, when the light having the color temperature and the luminous flux indicated by the arbitrary point P6 in the normal mode (hereinafter, may be referred to as “first mode”) is output from the light source 22a, the maximum luminous flux is operated by a user or the like. When the lighting device 100 receives an instruction to output light having a luminous flux higher than that of L3, the light source 22a shifts to the second mode having a region m2 discontinuous from the region m1 of the first mode. To control.

The region m2 is surrounded by a line segment connecting points Q1, Q3, Q9, Q7, and Q1 in this order. As shown in FIG. 5, in the lighting device 100 according to the embodiment, in the second mode, a total of 9 patterns of dimming and toning control of points Q1 to Q9 included in the range of the color temperature T2 to T4 and the luminous flux L4 to L6 are controlled. It can be performed. As described above, the output light from the light source 22a in the second mode has a variable combination of color temperature and luminous flux, so that brightness suitable for the needs of the user can be obtained. In the lighting device 100 according to the embodiment, the output light of the first light emitting element 94-1 to 94-n and the second light emitting element 95-1 to 95-n included in the light source 22a is diffused by the diffusing member 3, and further covered. Since it is diffused by the member 7, the first light emitting elements 94-1 to 94-n and the second light emitting elements 95-1 to 95-n output even when the light flux is increased as in the second mode. As a result of effectively diffusing the light, it is possible to reduce the feeling of light particles on the surface of the cover member 7. The dimming and toning control in the second mode is not limited to 9 patterns, and may have, for example, 8 or less or 10 or more control patterns. Further, the lighting control unit 91 may be configured so that the color temperature and the luminous flux can be controlled steplessly in the second mode.

In this way, the second mode, which outputs light having a luminous flux higher than that of the maximum luminous flux L3 in the first mode, increases the output of light from the second light emitting elements 95-1 to 95-n as compared with the first mode. That is, it is realized by increasing the current value supplied to the second light emitting elements 95-1 to 95-n. Therefore, in the first mode, it is preferable to set the second mode at a color temperature in a region where the output from the second light emitting elements 95-1 to 95-n is relatively low.

In the lighting device 100 according to the embodiment, the luminous fluxes L4, L5, and L6 are 1.3 times (for example, 7930 lm) and 1.4 times (for example, 8540 lm) of the maximum luminous flux L3 (for example, 6100 lm) in the first mode, respectively. ), 1.5 times (for example, 9150 lm). However, such a setting may be arbitrarily set according to, for example, the number of applicable tatami mats of the lighting device 100, the intended use, and the like.

When the number of applicable tatami mats is 14, for example, the color temperature can be set to T2 = 3900K, T3 = 4200K, T4 = 4500K, etc., but the present invention is not limited to these, and for example, the applicable tatami mat of the lighting device 100 It may be arbitrarily set according to the number and application, the color temperature of the first light emitting elements 94-1 to 94-n and the second light emitting elements 95-1 to 95-n, and the like.

When the lighting device 100 according to the embodiment shifts from the first mode to the second mode, the lighting control unit 91 has a point that the output light from the light source 22a has the maximum color temperature T4 and the maximum luminous flux L6 in the second mode. Control to shift to Q9. With such control, the light source 22a can always output light having the same color temperature and luminous flux when shifting from the first mode to the second mode. However, the control at the time of transition from the first mode to the second mode is not limited to this, and for example, light having a color temperature and a luminous flux may be output according to the latest control pattern applied last time in the second mode. ..

As described above, the lighting device 100 according to the embodiment includes a light source 22a and a lighting control unit 91. The light source 22a has a plurality of first light emitting elements 94-1 to 94-n and a plurality of second light emitting elements 95-1 to a plurality of second light emitting elements 95-1 to which the color temperature of the light output is different from that of the first light emitting elements 94-1 to 94-n. It has 95-n. The lighting control unit 91 has a first mode in which the output light from the light source 22a has a relationship between a predetermined color temperature and a luminous flux, and a second mode having a region m2 discontinuous from the region m1 of the first mode. The lighting of the first light emitting element 94-1 to 94-n and the second light emitting element 95-1 to 95-n is controlled according to the above. Therefore, according to the lighting device 100 according to the embodiment, it is possible to provide a lighting device that can obtain brightness that meets the needs of the user.

In the lighting device 100 according to the embodiment, in the second mode region m2, the upper limit and the lower limit of the luminous flux are both constant regardless of the magnitude of the color temperature, but the present invention is not limited to this, and for example, a point. The lower limit of the luminous flux rises as the color temperature rises so that the lower limit of the second mode indicated by the line segment connecting Q1 and Q3 is parallel to the upper limit of the first mode indicated by the line segment connecting the points P5 and P4. You may.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

22a Light source 81 Control unit 82 Power supply unit 90 AC power supply 91 Lighting control unit 92 First lighting control unit 93 Second lighting control unit 94-1 to 94-n First light emitting element 95-1 to 95-n Second light emitting element 100 Lighting device

Claims (4)

A light source having a plurality of first light emitting elements and a plurality of second light emitting elements having different color temperatures of light output from the first light emitting element;
The first light emission corresponds to a first mode in which the output light from the light source has a relationship between a predetermined color temperature and a luminous flux, and a second mode having a region discontinuous from the region of the first mode. A lighting control unit that controls the lighting of the element and the second light emitting element;
Equipped with
Wherein the output light in the second mode, the lighting device in which a combination of color temperature and luminous flux is characterized variable der Rukoto. The lighting device according to claim 1, wherein the lighting control unit controls the luminous flux of the output light in the second mode to be higher than the maximum luminous flux of the output light in the first mode. The color temperature of the second light emitting element is lower than the color temperature of the first light emitting element.
The lighting device according to claim 1 or 2, wherein the output from the second light emitting element is higher in the second mode than in the first mode. The lighting control unit is characterized in that the output light when shifting from the first mode to the second mode is controlled to have the maximum color temperature and the maximum luminous flux in the second mode. The lighting device according to any one of 3 to 3.

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