Lighting fixtures

Abstract

The present invention aims to provide a lighting fixture equipped with light-emitting elements such as LEDs, and with a streamlined structure. [Solution] The lighting fixture 1 of the present invention comprises a main body 10, a power supply 20, a light source 40, a light diffusion cover 30, and a mounting fixture 90. The light source 40 has a normal mode in which it lights up at a constant brightness and a fluctuation mode in which the brightness changes at a predetermined sinusoidal period. In normal mode, the light source 40 maintains a predetermined brightness. In fluctuation mode, the brightness changes at a sinusoidal period, and the brightness increases in a sinusoidal upward curve, reaching its maximum brightness when it reaches the upper peak point and its minimum brightness when it reaches the lower peak point. This cycle is repeated, and when the lower peak point is reached, the brightness is kept constant for a predetermined time.

Description

Technical Field

[0001] The present invention relates to a lighting fixture including a light-emitting element such as an LED.

Background Art

[0002] A plurality of lighting fixtures using a light-emitting element such as an LED have been proposed. For example, Patent Document 1 discloses a lighting fixture that controls the amount of light using a light-emitting element such as an LED.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The lighting fixture of Patent Document 1 is intended to obtain a predetermined effect such as a lighting effect and a psychological effect by maintaining the light environment in a predetermined area substantially constant, and includes a plurality of light source units having different light emission directions and a control unit that controls the emission intensity of at least one of the plurality of light source units. When the light color and / or the amount of light of at least one of the plurality of light source units is changed, the control unit controls the emission intensity of the other light source units according to the change in the light color and / or the amount of light of the light incident from the light source unit to a predetermined area irradiated with the light from the other light source units. However, in the aspect of the lighting device of Patent Document 1, when the amount of light of one light source changes, the amount of light of the other light source units (light source units for indirect lighting) changes, so it is not sufficient to give the user a sense of relaxation and a relaxation effect, and there is a drawback that the configuration is complicated.

[0005] Therefore, an object of the present invention is to provide a lighting fixture that is sufficient to give the user a sense of relaxation and a relaxation effect and has a rationalized configuration.

Means for Solving the Problems

[0006] To achieve the above objective, the lighting fixture of the present invention is It has a main unit, a power supply, and a light source. The aforementioned power supply device is A device that supplies power to the light source and controls the dimming of the light source, In normal mode, a constant power is supplied to the light source to control the dimming of the light source. In the fluctuation mode, the light source is supplied with sinusoidal power, and the light source is controlled to repeat a cycle in which the brightness increases in the sinusoidal upward curve, reaching its maximum brightness when it reaches the upper peak point and its minimum brightness when it reaches the lower peak point. Furthermore, when the lower peak point is reached, the light source's brightness is kept constant for a predetermined time, thereby controlling the dimming of the light source.

[0007] Furthermore, the lighting fixture of the present invention is characterized in that the light source comprises a main light source and a secondary light source, and the power supply device controls the dimming of at least one of the main light source or the secondary light source between normal mode and fluctuating mode. [Effects of the Invention]

[0008] According to the present invention, a lighting fixture having a light-emitting element such as an LED can be made simple in configuration that provides the user with a sense of peace and relaxation by controlling the brightness to fluctuate at a constant rate during the fluctuating mode and to maintain the minimum brightness at a constant level for a predetermined time. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is an exploded perspective view of the lighting fixture according to the embodiment. [Figure 2] Figure 2(A) is a schematic side view of the lighting fixture according to the embodiment, and Figure 2(B) is a schematic cross-sectional view of the same lighting fixture. [Figure 3] Figure 3 is a cross-sectional view of the main part near the light guide plate of the lighting fixture according to the embodiment. [Figure 4A]Figure 4A is a perspective view of the lighting fixture of the embodiment, as seen from the floor side. [Figure 4B] Figure 4B is a plan view of the lighting fixture as seen from the floor side. [Figure 4C] Figure 4C is a plan view showing the light guide plate, housing, and main body of the lighting fixture as seen from the ceiling side. [Figure 5] Figure 5 is a plan view showing the arrangement of mounting fixtures on the main body of the lighting fixture according to the embodiment. [Figure 6] Figure 6(A) is a plan view showing a modified example of the housing of the lighting fixture according to the embodiment, and Figure 6(B) is a side view thereof. [Figure 7A] Figure 7A is an explanatory diagram illustrating the sinusoidal dimming of the light source brightness of a lighting fixture in normal fluctuation mode. [Figure 7B] Figure 7B is an explanatory diagram showing the sinusoidal dimming of the brightness of the light source of the lighting fixture in the embodiment. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will now be described. However, the present invention is not limited to the following embodiments. Also, in the following figures, the same parts are denoted by the same reference numerals. The lighting fixture and light diffusion cover of the present invention can be applied to various lighting fixtures, including ceiling lights that are attached to wiring devices such as hook ceiling rosettes located on the ceiling surface, pendant lights that are suspended from the ceiling surface, and other lighting fixtures that are directly attached to the ceiling surface, as well as floor-standing lamps and wall-mounted lighting fixtures.

[0011] In typical residential homes, wiring devices 3, such as hook-type ceiling rosettes, hook-type ceiling bodies, hook-type ceilings, or hook-type rosettes, are installed on the ceiling surface for mounting ceiling lights and the like. The lighting fixture 1 is attached to the wiring device 3 installed on the ceiling surface 2 inside the house via an adapter 100. In addition, E26 bases may be used as wiring devices.

[0012] In addition, AC power is supplied from a commercial power source to a general household residence. By attaching an adapter 100 for the lighting fixture 1 to a wiring device 3 installed on the ceiling surface 2, the wiring device 3 and the adapter 100 are mechanically and electrically connected, and AC power is supplied from the in-house power line through the wiring device 3 to the lighting fixture 1 from the adapter 100.

[0013] Here, the lighting fixture according to an embodiment of the present invention will be described while referring to the drawings. Note that the following embodiments show a specific example of the present invention, and the arrangement, functions, numerical values, etc. of the components described in the embodiments are merely examples, and the scope of the present invention is not limited or interpreted by these.

[0014] (Embodiment) Hereinafter, the lighting fixture 1 according to the embodiment will be described.

[0015] FIG. 1 is an exploded perspective view of the lighting fixture 1 according to an embodiment of the present invention. As shown in the figure, the lighting fixture 1 of the embodiment is composed of a main body 10, a power supply device 20, a housing 60, a light guide plate 80, a frame 70, a light diffusion cover 30, and a main light source 50. The main body 10 is a member also known as a "chassis", which is formed into a circular shape from a flat plate of a metal material such as cold-rolled steel sheet, and a circular opening 13 is formed in the center.

[0016] An adapter 100 for attaching the lighting fixture 1 to a wiring device 3 arranged on the ceiling surface 2 is attached to the opening 13 of the main body 10. In order to detachably fix the adapter 100, an annular mounting member 35 for fixing the adapter 100 is provided in the opening 13 of the main body 10. In addition, on the main body 10, mounting tools 90 for engaging with the housing 60 are provided at three locations at regular intervals concentrically near the wall portion 15 of the flat plate portion 11. Note that the mounting tools 90 are not limited to three locations and can be appropriately changed according to the configurations of the main body 10 and the housing 60, such as providing four locations.

[0017] The housing 60 has a roughly truncated square pyramidal shape, with a circular cross-section at the top 62 and a roughly square cross-section at the bottom 63. On the inside edge of the top 62, there are three inner protrusions 61 that fit into the mounting fixture 90 of the main body 10 to detachably connect the housing 60 and the main body 10, and these protrusions are provided at regular intervals corresponding to the mounting fixture 90. The power supply unit 20 is positioned between the top 62 of the housing 60 and the main light source 50. The power supply unit 20 and the roughly rectangular main light source 50 are installed in order from the top 62 side of the housing 60. On the bottom 63 side of the housing 60, the light guide plate 80, frame 70, and light diffusion cover 30 are arranged in that order. The housing 60 is fixed to the main body 10 by the engagement of the mounting fixture 90, which is provided near the wall 15 of the main body 10, and the inner protrusions 61 provided on the edge of the housing 60. As a result, the main light source 50, light guide plate 80, frame 70, and light diffusion cover 30, which are integrally fixed to the housing 60, are positioned on the ceiling surface 2.

[0018] In this embodiment, a housing 60 with a roughly truncated square pyramidal shape is used. However, the shape of the housing 60 is not limited to the roughly truncated square pyramidal shape of this embodiment. It may also be an inverted truncated square pyramidal shape obtained by swapping the apex and base of the truncated square pyramidal shape, or any other appropriate shape such as cylindrical, truncated cone, cubic, or rectangular prism. Note that components such as wiring, screws, and connectors are omitted in the drawings (the same applies hereafter).

[0019] The main light source 50 consists of multiple light-emitting elements 52, such as LEDs, mounted on a roughly rectangular substrate 51. The substrate 51 is not limited to a single flat plate; it may be made up of multiple substrates connected together to form a roughly rectangular shape. Furthermore, the substrate 51 is not limited to a roughly rectangular shape; it may also be a circular substrate on which multiple light-emitting elements are mounted in a row or ring. The main light source 50 emits light from a surface as the main illumination unit, illuminating the front (floor) side.

[0020] The light-emitting element 52 is a surface-mount type LED package, and multiple elements are mounted on the substrate 51 at predetermined intervals. In this embodiment, the light-emitting elements 52 are arranged in a matrix at regular intervals. Alternatively, the light-emitting elements 52 may be of daylight white and incandescent color, and these may be arranged alternately, with predetermined intervals between adjacent light-emitting elements 52 in each row. Color tuning is possible by adjusting the current flowing through the daylight white and incandescent light-emitting elements 52. In addition, light-emitting elements 52 having light-emitting colors other than daylight white and incandescent color may be used. The number of light-emitting elements 52 and their arrangement can be set as appropriate, such as in a row or in a ring, depending on the desired output. Furthermore, organic EL elements or the like may be used instead of LEDs for the light-emitting elements 52.

[0021] The light-emitting element 52 can function as a night light by dimming the entire light-emitting element 52 mounted on the substrate 51. However, by designating one or more of the light-emitting elements 52 as night light elements and adjusting their brightness, it is possible to create an environment in which people can sleep peacefully at night in a typical home. In this case, the light-emitting element 52 is preferably incandescent in color.

[0022] The substrate 51 is a flat plate with a roughly rectangular shape. Multiple mounted light-emitting elements 52 and power terminals (not shown) that receive DC power from the power supply unit 20 are arranged on the surface of the substrate 51.

[0023] The substrate 51 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 on which the light-emitting element 52 is mounted using silver foil. However, the wiring pattern is not limited to this and may be formed on the back surface or inside the substrate 51. In addition, a white resist layer that acts as a reflective layer is applied to the top of the wiring pattern, i.e., the surface of the substrate 51. As for the material of the substrate 51, if an insulating material is used, ceramic materials, synthetic resin materials, etc. can be applied in addition to glass epoxy resin (FR-4). If the substrate 51 is made of metal, a base substrate in which an insulating layer is laminated on one side of a base plate with good thermal conductivity and excellent heat dissipation, such as aluminum, can be used.

[0024] The light diffusion cover 30 is positioned to completely cover the light-emitting surface of the main light source 50, diffusing the linearly emitted light from the light-emitting element 52 to illuminate the front (floor) side. The light diffusion cover 30 is made of a milky white material, but a lens portion (not shown) facing the light-emitting element 52 mounted on the substrate 51 may be provided on the surface of the light diffusion cover 30 to provide anti-glare properties and light diffusion effects. Alternatively, the surface of the light diffusion cover 30 may be processed to have a frosted glass-like or slit-like pattern to provide anti-glare properties and light diffusion effects.

[0025] The light-diffusing cover 30 is formed from a transparent resin with light-diffusing properties, such as polycarbonate (PC), acrylic such as PMMA (polymethyl methacrylate), or PS (polystyrene).

[0026] Although the light-diffusing cover 30 itself functions as a cover member, an additional cover member, also known as a "globe" (not shown), may be provided to cover the surface of the light-diffusing cover 30. The cover member can be any shape as long as it covers the surface of the light-diffusing cover 30, but it is made of a light-transmitting material, and a milky white material may be used to provide light-diffusing and anti-glare properties. In addition, acrylic resins such as PMMA (polymethyl methacrylate) are used for the cover member, but it is not limited to this, and synthetic resins such as polycarbonate and polystyrene may also be used. Furthermore, light-diffusing and anti-glare properties may be provided by processing the surface of the cover member to have a frosted glass-like or slit-like pattern.

[0027] Figure 2(A) is a schematic side view showing the lighting fixture 1 of the embodiment mounted on the ceiling surface 2. Here, the ceiling surface 2 and wiring device 3 are omitted. The housing 60 has a roughly truncated square pyramidal shape, with the top 62 having a circular cross-section and the bottom 63 having a roughly square cross-section. The area near the bottom 63 is composed of four vertical rectangular surfaces with sides cut perpendicularly from each side of the square cross-section, and the area near the bottom 63 as a whole has a rectangular parallelepiped shape. The main body 10 is detachably positioned on the top 62 of the housing 60.

[0028] Furthermore, an adapter 100 is attached to the upper surface of the main body 10 in Figure 2(A), and a pair of inverted L-shaped hooking blades 101 provided on the upper surface of the adapter 100 protrude from the upper surface of the main body 80. The hooking blades 101 engage with a pair of hooking blade engagement holes 104 of the wiring device 3 located on the ceiling surface 2, thereby detachably fixing the lighting fixture 1 to the wiring device 3. On the bottom 63 side of the housing 60, a light guide plate 80, a frame 70, and a light diffusion cover 30 are arranged in that order. Multiple sub-light sources 73 that emit light toward the side surface of the flat light guide plate 80 are arranged in a line along the side surface of the frame 70.

[0029] Figure 2(B) is a schematic cross-sectional view of Figure 2(A). The adapter 100 has a pair of claws 102 on its side. The claws 102 engage with an annular mounting member 35 arranged around the opening 13 of the main body 10 and are held by the mounting member 35, and the main body 10 is held by the adapter 100 and attached to the wiring device 3.

[0030] Inside the housing 60, a box-shaped power supply unit 20, a main light source 50 and a secondary light source 73 constituting the light source 40, a light guide plate 80, a roughly rectangular frame 70 consisting of an L-shaped cross-section frame material 71 supporting the light guide plate 80, and a light diffusion cover 30 are arranged in that order. The light guide plate 80 has an opening 81 that is roughly the same shape as the main light source 50. The light diffusion cover 30 is positioned on the front (floor) side of the frame material 71.

[0031] Figure 3 is a cross-sectional view of the main part of the lighting fixture 1 of the embodiment near the light guide plate 80. The light diffusion cover 30 receives the emitted light from multiple light-emitting elements 52 mounted on the substrate 51 of the main light source 50 installed inside the housing 60, irradiating it toward the front (floor surface), and diffuses the light into the room, resulting in uniform surface emission with consistent brightness. The arrows in Figure 3 indicate the direction of light emission.

[0032] The frame 70 has an overall shape that is roughly square, with L-shaped frame members 71 surrounding all four sides and having an opening 74. Multiple sub-light sources 73 are arranged in rows along the roughly square-shaped frame members 71 on the bottom (L-shaped bottom portion) 72 of the frame members 71. Irradiation light is emitted from the sub-light sources 73 in a roughly horizontal outward direction. The row of sub-light sources 73 is arranged in a single row, but there may be multiple rows, or the sub-light sources 73 consisting of light-emitting elements 52 such as LEDs of different colors such as blue, red, and green may be arranged in one or more rows as appropriate, with multiple colored light-emitting elements 52 of the same color or combinations of different colors.

[0033] The light guide plate 80 has an internal rectangular opening 81 which rests on a bottom portion 72 that protrudes approximately horizontally outward from the L-shaped frame material 71 of the frame 70. Inside the housing 60, the main light source 50, light guide plate 80, frame 70, and light diffusion cover 30 are arranged in that order from the ceiling surface 2 side.

[0034] The light guide plate 80 is positioned approximately parallel to the ceiling surface 2. The secondary light source 73 emits illumination light from the side of the conductive plate 80 toward the side of the light guide plate 80. The illumination light incident on the light guide plate 80 passes through the inside of the light guide plate 80 and reaches the design portion 82. The light that passes through the inside of the light guide plate 80 from the design portion 82 is extracted to the outside of the light guide plate 80, and the illumination light is emitted toward the outside of the design portion 82. As a result, the design portion 82 shines brightly, and the patterns of the design portion 82 drawn on the light guide plate 80 become visible. A portion of the illumination light that passes through the inside of the light guide plate 80 passes through the conductive plate 80 and is emitted toward the outside from the end of the light guide plate 80. The design portion 82 consists of, for example, a recess formed on the surface of the light guide plate 80, and the formed recess changes the path of the irradiated light passing through the inside of the light guide plate 80, guiding it to exit to the outside of the light guide plate 80. Specifically, it is a portion that depicts characters, figures, symbols, pictures, or patterns combining them to change the path of the irradiated light.

[0035] The light guide plate 80, which is provided with the design portion 82, exhibits a design effect when the design portion 82 emits light, and through this visual effect, provides the user with a sense of peace and relaxation, as well as a sense of security, satisfaction, and fulfillment.

[0036] The main light source 50 is controlled by a control signal transmitted from the power supply unit 20, which allows for the turning on / off of the emitted light, as well as dimming (changing the brightness) and color adjustment (changing the hue).

[0037] Similarly, in the case of the secondary light source 73 that emits light toward the side surface of the light guide plate 80, the power supply unit 20 controls the on / off, dimming / color adjustment of the light emitted from the design portion 82 of the light guide plate 80.

[0038] In this embodiment, the light guide plate 80 extends in a substantially horizontal direction (substantially parallel to the floor surface), but it may also be given a certain angle (horizontal angle α) with respect to the horizontal direction. In this embodiment, the horizontal angle α of the light guide plate 80 is approximately 0°, but for example, the horizontal angle α of the light guide plate 80 may be set within the range of 0° to ±60° such that it is tilted at an angle of 15°, 30°, or 45° toward the floor surface with respect to the horizontal plane (plane parallel to the floor surface) (α = -15°, -30°, -45°), or at an angle of 15°, 30°, or 45° toward the ceiling surface (α = 15°, 30°, 45°).

[0039] In this embodiment, the brightness of the light source 40 is expressed in units of the amount of light emitted from the light source 40 in all directions (total luminous flux lm: lumens), and is 0 lumens when the light source 40 is turned off. The amount of light (total luminous flux) of the light source 40 when fully lit varies depending on the lighting fixture. For ceiling lights in general residences, it is usually in the range of 500 to 10,000 lumens, but is not limited to this range.

[0040] Figure 7A is an explanatory diagram showing the sinusoidal dimming of the brightness of the light source 40 of the lighting fixture in normal fluctuation mode, and Figure 7B is an explanatory diagram showing the sinusoidal dimming of the brightness of the light source 40 of the lighting fixture 1 of the embodiment. Generally, the waveform of human respiration, which forms the basis of fluctuation mode, is a continuous sinusoidal wave (sin). However, when a person actually breathes in accordance with this waveform, they feel restless. Therefore, by using the waveform of the embodiment shown below, it is possible to better match the actual breathing cycle, allowing the user to experience a sense of calm and relaxation. The fluctuation modes of the embodiment will be described below.

[0041] The power supply unit 20, positioned between the main unit 10 and the light source 40, supplies DC power to the light source 40 and controls the dimming of the light source 40. The lighting fixture 1 has two lighting modes: a normal mode and a flickering mode. The normal mode maintains a constant brightness in living spaces by supplying a constant power to the light source 40, while the fluctuating mode changes the brightness and is primarily used at night in relaxing living spaces or bedrooms. In normal mode, the user operates the operation buttons on the remote controller 110 to supply a constant DC power from the power supply unit 20 to the light source 40, and the brightness of the light emitted by the light source 40 changes between 0% (off) and 100% (maximum brightness).

[0042] The brightness of the light source 40 is controlled by operating the operation button 112 of the remote controller 110, but is not limited to this. As shown in Figures 7A and 7B, the fluctuation mode in this embodiment is a sinusoidal dimming mode in which the brightness (a) of the light source 40 changes at a constant period. The brightness (a) shown in Figures 7A and 7B is a relative value with 0% when the light is off and 100% when it is fully lit.

[0043] The basic form of the fluctuation mode shown in Figure 7A is one in which the brightness (a) of the light source 40 increases or decreases in response to the supplied power, as sinusoidal DC power (S1) with an amplitude (a1-a)(a-a0) that changes at a constant period is supplied from the power supply 20. In the upper cycle of the sinusoidal wave (S1), the brightness (a) of the light source 40 increases, reaching its maximum brightness (a1) when it reaches the upper peak point (peak) (P1)(P3) where the amplitude (a1-a)(a-a0) is maximum, and then gradually decreases until it reaches its minimum brightness (a0) when it reaches the lower peak point (trough) (P2), and this sinusoidal cycle is repeated.

[0044] The period (T) of the sinusoidal wave (S1) that is effective for the user to obtain a sense of peace and security is in the range of approximately 1 second to 60 seconds, but is most effective in the range of 3 seconds to 20 seconds, preferably 5 seconds to 12 seconds, and even more preferably 6 seconds to 11 seconds.

[0045] The brightness (a0) at the lower peak point (valley) (P2) can be set to the desired brightness within a range from a state where DC power is not supplied from the power supply unit 20 to the light source 40, i.e., when the light source 40 is off (0%), to 90% of the brightness when fully lit in normal mode (a1). Furthermore, as mentioned above, the dimming range for the brightness (a) of the light source 40 is based on 0 to 90%, but the user can set the dimming range as appropriate, such as 0% to 80%, 5% to 75%, etc.

[0046] As shown in Figure 7B, in the fluctuation mode of the embodiment, the constant duration (t0) of brightness (a0) at the lower peak point (trough) (between P2 and P2') of the sinusoidal wave (S2), which is effective in creating a relaxing space in the room and allowing the user to obtain a sense of peace and relaxation, is 1 to 5 seconds, preferably 2 to 4 seconds. In this fluctuation mode, the period (T1) of the sinusoidal wave (S2) is T+(t0), which is the sum of the period T of the sinusoidal wave (S1) and the duration (t0). This setting can be varied by the user's operation, so it is possible to set it to match the user's needs.

[0047] The fluctuation mode of the lighting fixture 1 may be applied to either the main light source 50 or the secondary light source 73 of the light source 40. When the fluctuation mode of the embodiment is applied to the secondary light source 73, the brightness (a) of the light guide plate 80 on which the design portion 82 is provided is changed regularly between 0 and 90%, thereby controlling the brightness of the design portion 82 of the light guide plate 80. By applying this fluctuation mode to the light source 50 and / or the secondary light source 73, it is possible to enhance the effect of creating a relaxing space in a typical living room.

[0048] The fluctuation mode can take the form of either the main light source 50 or the secondary light source 73 of the light source 40 emitting light, or the form of both the light source 50 and the secondary light source 73 emitting light in sync. Furthermore, the sinusoidal period and amplitude of the brightness of the emission may be adjusted as appropriate for each of the main light source 50 or the secondary light source 73.

[0049] By controlling two types of light sources 40, a main light source 50 and a secondary light source 73, it is possible to (1) turn off the main light source 50 and turn on the secondary light source 73 to illuminate only the design portion 82 of the light guide plate 80, (2) turn on only the main light source 50, or (3) turn on both the main light source 50 and the design portion 82 simultaneously. Furthermore, by adjusting the brightness and color temperature of each of the two types of light sources 40, the main light source 50 and the secondary light source 73, various lighting combinations become possible, allowing each user to set their preferred lighting.

[0050] In this embodiment, sinusoidal dimming of the light source 40 is performed, but a fluctuation mode may also be applied, which adds a sinusoidal color adjustment function that regularly changes the color of the light in addition to dimming. In this way, by controlling the flickering of the light source 40, it is possible to improve the effect of providing users with a sense of relaxation, peace of mind, and security.

[0051] Furthermore, by sequentially turning on and off multiple auxiliary light sources 73 arranged in a row along the roughly square-shaped frame material 71, the light emitted from the auxiliary light sources 73 can be made to appear as if flowing, which can be expected to improve the visual effect. In addition, the variations in lighting patterns can be increased by individually turning on / off, dimming, and adjusting the color of the auxiliary light sources 73 arranged along each side of the roughly square.

[0052] Furthermore, for example, by equipping the lighting fixture 1 of the embodiment with an acoustic device including a speaker, and combining auditory effects such as the sound of waves, the babbling of a river or the rustling of twigs, the chirping of birds or specific frequencies with the control of the flickering illumination of the light source 40, the sense of peace and relaxation can be further enhanced.

[0053] Furthermore, in addition to sound equipment including a speaker, a photocatalytic sterilization and deodorization device, an earthquake warning device equipped with an earthquake detection sensor, and a wireless LAN repeater for internet connectivity of mobile phones and personal computers may be placed around the power supply unit 20 located between the main unit 10 and the main light source 50 inside the housing 60.

[0054] Figure 4A is a perspective view of the lighting fixture 1 of the embodiment as seen from the floor side. When the auxiliary light source 73 is turned on in the lighting fixture 1 installed on the ceiling surface 2, the design part 82, which consists of shapes such as lines, circles, squares, and rhombuses drawn on the light guide plate 80, emits bright light. This lit state of the lighting fixture 1 can be used, for example, as lighting in a relaxed setting. The light guide plate 80 can also be used as a night light by turning on only the auxiliary light source 73 of the light guide plate 80 without the light diffusion cover 30 emitting light, i.e., without turning on the main light source 50, and by reducing the number of lit lights to adjust the brightness, or by adjusting the color temperature to an incandescent color.

[0055] Figure 4B is a plan view showing the lighting fixture 1 of the embodiment as seen from the floor side. Figure 4B shows a similar rectangular light guide plate 80 arranged to surround the rectangular light diffusion cover 30. Figure 4C is a plan view showing the configuration relationship of the lighting fixture 1 of the embodiment as seen from the ceiling surface 2 side, including the light guide plate 80, the housing 60, the main body 10 having an opening 13, and the adapter 100 fitted into the opening 13.

[0056] Figure 5 is a plan view showing the arrangement of the mounting bracket 90 on the main body 10 of the lighting fixture 1 of the embodiment. The main body 10 has a central opening 13 and an annular protrusion 14 that projects toward the ceiling surface 2 formed around it, a flat plate portion 11, and a wall portion 15 that rises almost vertically from the flat plate portion 11 toward the front (floor surface) on the outside of the flat plate portion 11. When attaching the housing 60 to the main body 10, the wall portion 15 can be used as an auxiliary member for positioning the main body 10 when lifting the housing 60 along the wall portion 15.

[0057] The inner protrusion 61 on the edge of the housing 60 fits into the mounting fixture 90 positioned on the flat plate portion 11 of the main body 10, thereby acting to fix the housing 60 to the main body 10.

[0058] Furthermore, the annular mounting member 35 is positioned to surround the opening 13 within the protrusion 14 of the main body 10. The mounting member 35 is a U-shaped member with a groove on its inner circumference, and the main body 10 is held by the adapter 100 when a pair of claws 102 of the adapter 100 are fitted into this groove.

[0059] The material of the mounting bracket 90 may be, for example, metal or resin. Examples of such metal materials include colored steel sheets, galvanized steel sheets, and stainless steel sheets for springs, while examples of resin materials include PP (polypropylene) and PBT (polybutylene terephthalate).

[0060] The adapter 100 can be a conventionally known one. A typical example of such an adapter 100 is one that has a flat cylindrical shape, as shown in Figures 1 and 2(B), and has a hooking blade 101 on its upper side for engaging with the hooking blade engagement hole 104 of the wiring device 3 located on the ceiling surface 2. The adapter 100 has wiring (not shown) that connects to the power supply device 20 inside the lighting fixture 1. The wiring device 3 and the adapter 100 are mechanically and electrically connected by engaging the hooking blade engagement hole 104 and the hooking blade 101.

[0061] The method for attaching the lighting fixture 1 to the ceiling surface 2 is as follows: First, engage the hook blade 101 of the adapter 100 with the hook blade engagement hole 104 of the wiring device 3, and fix the adapter 100 to the wiring device 3. Next, lift the main body 10, pass the adapter 100 through the central opening 13 of the main body 10, and push it up until the pair of claws 102 of the adapter 100 overcome the opening 13 of the main body 10.

[0062] The pair of claws 102 of the adapter 100 are biased by springs in both outward directions. When the main body 10 is lifted so as to move over the claws 102, the claws 102 engage with the mounting member 35 located in the opening 13 of the main body 10, and the main body 10 is fixed to the adapter 100. Then, by lifting the housing 60 to align with the main body 10 and rotating it horizontally, the mounting fixture 90 of the main body 10 engages with the inner protrusion 61 provided on the edge of the housing 60, and the housing 60 is fixed to the ceiling surface 2 together with the main body 10.

[0063] Furthermore, to remove the lighting fixture 1 from the adapter 100 fixed to the wiring device 3 on the ceiling surface 2, the housing 60 is rotated and removed, and then the pair of levers 83 on the underside of the adapter 100 are pulled inward, causing the claw portion 102 to be pulled inward from the adapter 100, disengaging the claw portion 102 from the mounting member 35, and allowing the main body 10 to be removed.

[0064] The power supply unit 20 is connected to a power source such as commercial power through the adapter 100 and wiring device 3, and includes a rectifier circuit that rectifies the current supplied from an external power source such as AC 100V, a transformer that converts the rectified voltage to a predetermined voltage, a constant current supply circuit that supplies a constant current to the light source 50, and a control circuit that receives a transmission signal from a remote controller 110 located outside the lighting fixture 1, generates a received sound, and performs power control, etc. A beep sound is used as the received sound, but a melody sound or voice data may also be used. The power supply unit 20 is also electrically connected to the light source 40 and controls the on / off, dimming, and color adjustment of the light source 40. Furthermore, when audio equipment such as speakers or auxiliary equipment such as a photocatalytic sterilization and deodorization machine are connected, it is possible to accommodate this by adding a control circuit to the power supply unit 20 to control those devices.

[0065] The remote controller 110 also includes a display panel 111 and operation buttons 112 for instructing the lighting fixture 1 to turn on / off, dim, adjust color temperature, and flicker lighting. The display panel 111 is located on the upper surface of the remote controller 110 and displays the status of the lighting fixture 1, such as on / off, dimming / color temperature adjustment, and flicker lighting. When the operator presses the operation buttons 112, the remote controller 110 transmits an infrared signal as an instruction signal to the receiving device of the lighting fixture 1. The signal receiving unit installed in the housing 60 receives the infrared signal transmitted from the remote controller 110 and transmits the received signal to the power supply unit 20. The power supply unit 20 controls the on / off of the light source 40, etc., according to the instruction signals from the remote controller 110. In addition, when audio equipment such as speakers or auxiliary equipment such as a photocatalytic sterilization and deodorization machine are connected to the lighting fixture 1, these auxiliary equipment can be controlled by operating the remote controller 110. The operation buttons 112 of the remote controller 110 that operates the lighting fixture 1 may consist of multiple buttons, and each button may be configured to transmit an independent instruction signal.

[0066] Figure 6(A) is a plan view showing a modified housing 60 of the lighting fixture 1 of the embodiment, and Figure 6(B) is a side view showing a modified housing 60 of the lighting fixture 1 of the embodiment. In this modified housing 60, the planar shapes of the top 62 and bottom 63 are both square, and the top 62 is a square pyramidal shape that is smaller in size than the bottom 63. Several vertically elongated slits 64 are provided on the side of the housing 60. These slits 64 are not limited to this modified housing but are also used in the embodiment housing to dissipate heat generated from heat sources such as the light source 40 and the power supply 20. Heat from these heat sources can be efficiently dissipated not only from the slits 64 but also from the housing 60, main body 10, light guide plate 80, and light diffusion cover 30, preventing overheating inside the housing 60. Heat can also be efficiently dissipated from the opening at the top 62 of the housing 60. Furthermore, the slits 64 have the effect of improving the insufficient volume of the received sound that occurs when receiving the operation signal transmitted from the remote controller 110.

[0067] Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments. Various modifications to the configuration and details of the present invention can be understood by those skilled in the art within the scope of the present invention.

[0068] According to the present invention, a lighting fixture having a light-emitting element such as an LED can be made simple in configuration that provides users with a sense of peace and relaxation, as well as a sense of security and satisfaction, by controlling the brightness to fluctuate at a constant rate during the fluctuating mode and maintaining that minimum brightness for a predetermined period of time. [Explanation of Symbols]

[0069] 1 Lighting fixtures 2 Ceiling surface 3 Wiring devices 10 Main Unit 11 Flat plate part 13 Aperture 14 Convex part 15 Wall 20 Power supply 30 Light Diffusing Cover 35 Mounting components 40 light source 50 Main light source 51 circuit boards 52 Light-emitting element 60 Housing 61 Inner protrusion 62 Top 63 Bottom 64 slits 70 frames 71 Frame material 72 Bottom 73 Secondary light source 74 Opening part 80 Light guide plate 81 Opening 82 Design Department 83 Lever 90 Mounting hardware 100 adapter 101 Hook blade 102 Nail area 104 Hook blade engagement hole 110 Remote Controller 111 Display Panel 112 Operation Buttons

Claims

1. A lighting fixture having a main body, a light source, and a power supply device, The main body has a circular opening in the center, and an adapter for attaching the lighting fixture to a wiring device located on the ceiling surface is attached to the opening. The aforementioned light source comprises a main light source and a secondary light source, The aforementioned power supply device is Power is supplied to at least one of the main light source or the sub-light source, and the dimming of at least one of the main light source or the sub-light source to which power is supplied is controlled between normal mode and fluctuating mode. In the normal mode, a constant power is supplied to at least one of the main light source or the sub-light source to control dimming. In the aforementioned fluctuation mode, a sinusoidal power is supplied to at least one of the main light source or the sub-light source, and the device is controlled to repeat a cycle in which the brightness increases in the sinusoidal upward curve, reaching its maximum brightness when it reaches the upper peak point and its minimum brightness when it reaches the lower peak point, and when it reaches the lower peak point, the device is controlled to maintain the brightness at a constant level for a predetermined time, thereby controlling the dimming, and the device can adopt a mode in which either the main light source or the sub-light source emits light, or a mode in which the main light source and the sub-light source emit light in sync.

2. The lighting fixture according to claim 1, wherein the brightness of the light source in the fluctuating mode is within the range of 0 to 90% of the brightness in the normal mode.

3. The lighting fixture according to claim 1 or 2, wherein the sinusoidal period is in the range of 3 seconds to 20 seconds, and the predetermined time at the lower peak point of the sinusoidal wave is in the range of 1 second to 5 seconds.

Images