TW201603646A - Illuminating device - Google Patents

Abstract

An illuminating device is provided for improving low visibility of object in illumination of daylight color or lamp color. It has daylight color LED(15b1) illuminating light with daylight color, lamp color LED(15b2) illuminating light with lamp color, blue LED(15b3) illuminating blue light, and control portion controlling the daylight color LED(15b1), lamp color LED(15b2), and blue LED(15b3). The control portion is used to light up the daylight color LED(15b1), lamp color LED(15b2), and blue LED(15b3) simultaneously.

Description

Lighting device

The present invention relates to an illumination device having a light-emitting element of a plurality of colors as a light source.

In the ceiling lighting device (so-called ceiling light), a light-emitting element (LED: Light Emitting Diode) of various colors of red, green, blue, light bulb, and daylight has been proposed, and the range of light color that can be expressed is increased. (Refer to Patent Document 1).

[Previous Technical Literature] [Non-patent literature]

[Patent Document 1] Japanese Patent Publication No. 2013-58394

However, in the illumination device in which the daylight color or the bulb color is mounted as described in Patent Document 1, the radiation intensity at a wavelength of 470 nm to 480 nm is weakened. For this reason, in the use of light bulb color or day Under the illumination of light color, when viewing objects (texts, etc.), there are cases where it is difficult to see things when viewed under sunlight (natural light).

SUMMARY OF THE INVENTION The present invention is directed to providing an illumination device that can eliminate the inconvenience of an object that is illuminated by daylight or light bulb colors.

The present invention is characterized in that it is provided with a daylight color LED that emits daylight color, a light bulb color LED that emits light of a light bulb color, a blue LED that emits blue light, and the aforementioned daylight color LED, the aforementioned light bulb color LED, and the aforementioned blue The control unit for controlling the color LED, wherein the control unit lights up at least one of the daylight color LED and the light bulb color LED and the blue LED at the same time.

According to the present invention, it is possible to provide a lighting device which can eliminate the difficulty of the object under the illumination of daylight color or light bulb color.

1A, 1B‧‧‧LED lighting device (lighting device)

11, 111‧‧‧ body base

11a, 111a‧‧‧Adapter mounting holes

12, 112‧‧‧Adapter storage unit

13, 113‧‧‧ Power Substrate

14, 114‧‧‧ heat sink

15‧‧‧LED light source substrate

15b‧‧‧LED component group

15b1‧‧‧ Daylight LED

15b2‧‧‧Light bulb color LED

15b3‧‧‧Blue LED

16‧‧‧reflector

17‧‧‧LED cover

19‧‧‧Lighting parts

31‧‧‧Light guide body

131‧‧‧Light guide plate

131a‧‧‧Flange

101‧‧‧Control Department

115‧‧‧1st LED light source substrate

115b‧‧‧LED component group

115b1‧‧‧ daylight LED

115b2‧‧‧Light bulb color LED

116‧‧‧LED cover

117‧‧‧reflector

121‧‧‧2nd LED light source substrate

121c‧‧‧Blue LED

131‧‧‧Light guide plate

131i‧‧‧Injection

131o‧‧‧Outlet Department

Fig. 1 is an exploded perspective view showing the LED lighting device according to the first embodiment.

Fig. 2 is a plan view showing the arrangement of LEDs of respective colors in the LED lighting device according to the first embodiment.

Fig. 3 is a view showing an LED lighting device according to a modification of the first embodiment. The configuration of the various LEDs is shown as a plan view.

Fig. 4 is a longitudinal cross-sectional view showing the LED lighting device according to the first embodiment.

Fig. 5 is a control block diagram showing the LED lighting device according to the first embodiment.

[Fig. 6] (a) is a spectral distribution diagram of a bulb color LED, (b) is a spectrum distribution diagram of a daylight color LED, and (c) is a spectrum distribution diagram of a blue LED.

[Fig. 7] (a) is a spectral distribution diagram in which (a), (b), and (c) of Fig. 6 are stacked, and (b) is a spectral distribution diagram in the case where a blue LED is added to all lamps, ( c) The spectral distribution of the brightness enhancement mode and the spectral distribution of the blue LED mode in the brightness enhancement mode.

[Fig. 8] A schematic diagram showing the relationship between the color temperature and the light beam.

[Fig. 9] A table showing the visibility of characters and the like for each mode.

Fig. 10 is an exploded perspective view showing the LED lighting device according to the second embodiment.

Fig. 11 is a perspective cross-sectional view showing the LED lighting device according to the second embodiment.

Fig. 12 is an enlarged view of a portion A of Fig. 11;

Hereinafter, an LED lighting device (LED ceiling lamp) according to an embodiment of the present invention will be described in detail with reference to the drawings. Further, in the LED lighting devices 1A and 1B (illuminating device) according to the present embodiment, For example, it is connected to the outside by a mounting adapter (not shown) that is attached to an indoor wiring device (not shown) such as a ceiling lamp box (rosette or ceiling) provided on the ceiling surface of the house. The power source is fixed to a predetermined position on the ceiling surface for the user.

(First embodiment)

Fig. 1 is an exploded perspective view showing the LED lighting device according to the first embodiment. In addition, in Fig. 1, the upper side of the paper is the ceiling side, and the lower side of the paper is the floor side.

As shown in FIG. 1 , the LED lighting device 1A is, for example, a circular body, and includes a main body base 11 , an adapter housing portion 12 , a power source substrate 13 , a heat dissipation plate 14 , an LED light source substrate 15A, a reflection sheet 16 , and an LED cover 17 . The center cover 18, the light blocking member 19, the annular member 20, the sensor unit 21, and the like are formed.

The main body base 11 is formed by processing a steel plate (for example, SPCC) into a member having a substantially circular shape, and is formed in a slightly concave shape (disc shape) so that the concave surface faces the floor side. Further, in the center of the main body base 11, an adapter mounting hole 11a to which an adapter (not shown) is attached is formed.

The adapter housing portion 12 is formed of a flame-retardant synthetic resin (for example, PBT: polybutylene terephthalate resin), and has an annular fixing portion 12a screwed to the body base 11, and is fixed therefrom. The inner peripheral portion of the portion 12a faces the cylindrical portion 12b that extends toward the floor side (downward).

The power source board 13 has a lighting circuit board or the like including a control unit, and is screwed to the adapter housing portion 12 via an insulating plate (not shown). In addition, the insulating plate is made of, for example, a polymer having electrical insulation and flame retardancy. It is formed by a resin material such as propylene. Thereby, the power source board 13 is disposed in a heat dissipation space surrounded by the main body base 11 and a heat dissipation plate 14 to be described later, and is maintained in a state of maintaining electrical insulation.

Further, the power source board 13 is electrically connected to a mounting adapter (not shown) through a wire (not shown). Thereby, the LED lighting device 1A is supplied with power through the indoor wiring device (not shown), the mounting adapter (not shown), and the power source substrate 13 respectively.

The heat radiating plate 14 is formed by forming a steel plate into a substantially circular shape, and a frustoconical substrate supporting portion 14a protruding from the floor side is formed. Further, the heat dissipation plate 14 is made of a metal having good thermal conductivity such as a galvanized steel sheet, and is compressed to improve strength. Further, the heat dissipation plate 14 is formed to have a larger diameter than the main body base 11, and is formed to be attached to the main body base 11 so as to protrude outward in the radial direction from the main body base 11.

Further, a circular through hole 14b is formed at a position in the radial direction of the heat dissipation plate 14 at a position corresponding to the cylindrical portion 12b of the adapter housing portion 12. Further, the annular portion 14c formed on the outer periphery of the heat dissipation plate 14 is attached to the storage device 14d for hanging the light shielding member 19 to be described later at three intervals at 120 intervals.

The LED light source substrate 15A includes a ring-shaped wiring board 15a and a plurality of LED element groups 15b arranged concentrically on one surface side (ground side) of the wiring board 15a. In addition, the details of the LED element group 15b will be described later.

The wiring board 15a is formed, for example, by forming an insulating layer, a copper foil pattern, or the like on a substantially annular metal plate made of an aluminum alloy, or is excellent in thermal conductivity. A copper foil pattern, a solder resist layer, and the like are formed on a flat plate of a good resin (for example, a polyimide resin). Further, the wiring board 15a is screwed to the heat dissipation plate 14.

In the present embodiment, the main body base 11 and the heat dissipation plate 14 having the above-described configuration are provided, thereby increasing the volume of the heat release space (increasing the amount of air in the heat release space), thereby improving the heat release efficiency of the power source substrate 13 and the LED light source substrate 15A. . As a result, the luminous efficiency of the LED element group 15b can be improved.

Fig. 2 is a plan view showing the arrangement of LEDs of respective colors in the LED lighting device according to the first embodiment. In addition, FIG. 2 is an example of the arrangement pattern of the 18-layer LED.

As shown in FIG. 2, the LED element group 15b includes a plurality of light-emitting LEDs 15b1 that emit light of a daylight color (D color), and a plurality of light-bulb color LEDs 15b2 that emit light of a light bulb color (L color). And a plurality of blue LEDs 15b3 emitting blue light. Further, the LED element group 15b is provided with an LED 15b4 for a safety light.

The daylight-colored LED 15b1 has a peak wavelength of 430 nm to 460 nm (see FIG. 6(a) to be described later), and a plurality of rows are formed concentrically from the outer peripheral side toward the inner peripheral side (in the embodiment of FIG. 2, nine columns). Further, the daylight color LED 15b1 is configured by, for example, combining a blue LED and a yellow phosphor.

The bulb color LED 15b2, which has a peak wavelength of 550 nm to 650 nm, is disposed in a row arranged concentrically with the daylight color LED 15b1 interposed therebetween. In addition, the bulb color LED 15b2, for example, will The blue LED is combined with a yellow phosphor to form. In other words, the bulb color LEDs 15b2 are arranged in concentric rows, and are arranged by sandwiching the two daylight-colored LEDs 15b1 in the circumferential direction. In addition, the bulb color LED 15b2 in the second row on the inner circumference side is disposed with one or two daylight color LEDs 15b1 interposed therebetween. Further, the daylight color LED 15b1 and the light bulb color LED 15b2 are arranged in concentric rows, and are arranged at equal intervals or substantially equal intervals in the circumferential direction.

The blue LED 15b3 has a peak wavelength of 450 nm to 480 nm, and is disposed in an annular shape at intervals between the outermost circumference and the innermost circumference of the concentric circular daylight color LED 15b1 and the bulb color LED 15b2 in the circumferential direction. The inner peripheral side of the blue LEDs 15b3 arranged in a ring shape has five rows concentrically and four rows concentrically on the outer peripheral side.

Fig. 3 is a plan view showing the arrangement of the LEDs of the respective colors of the LED lighting device according to the modification of the first embodiment. In addition, the LED light source substrate 15B shown in FIG. 3 is shown in the arrangement pattern of the LEDs for the eight stacks, and the number and arrangement of the LED element groups 15b differ only from the LED light source substrate 15A, and the wiring board 15a is different. The shape is the same. Further, the LEDs 15b4 for the safety light are disposed at the same position regardless of the number of stacks.

As shown in FIG. 3, the daylight-colored LEDs 15b1 have the same peak wavelength as described above, and a plurality of rows are formed concentrically from the outer peripheral side toward the inner peripheral side (in the embodiment of FIG. 3, six columns).

The bulb color LED 15b2 has the same peak wavelength as described above, and is arranged in a concentric circle to have the daylight color LED 15b1 Configured in the middle.

The blue LEDs 15b3 have the same peak wavelength as described above, and are arranged in a ring shape at intervals between the outermost circumference and the innermost circumference of the daylight-colored LEDs 15b1 and the bulb-colored LEDs 15b2 arranged concentrically in the circumferential direction. . The inner peripheral side of the annular blue LED 15b3 is arranged in three rows concentrically, and is arranged in three rows concentrically on the outer peripheral side.

The LED element group 15b shown in Fig. 2 is constituted by, for example, 275 daylight color LEDs 15b1, 142 light bulb color LEDs 15b2, and 41 blue LEDs 15b3. Further, the LED element group 15b shown in FIG. 3 is constituted by, for example, 148 daylight color LEDs 15b1, 76 light bulb color LEDs 15b2, and 23 blue LEDs 15b3. In this manner, the number of the blue LEDs 15b3 is preferably 10% of the total count of the daylight color LEDs 15b1 and the light bulb color LEDs 15b2.

Referring back to Fig. 1, the reflection sheet (reflection film) 16 has a function of reflecting light emitted from the LED element group 15b toward the ceiling side (light reflected in the ceiling direction by the LED cover 17) on the floor side, and the LED The shape of the light source substrate 15A is formed in a donut shape (annular shape) in plan view. Further, the reflection sheet 16 is formed of a white resin sheet, and a through hole 16a for individually exposing (inserting) the respective elements of the LED element group 15b is formed. Further, in the present embodiment, the case where the reflection sheet 16 is provided will be described as an example, but the invention is not limited thereto, and the heat dissipation plate 14 may be configured to be highly reflective coated. In the present embodiment, the non-high-reflection coating is used, and the reflection sheet 16 is used, which makes it inexpensive. The LED lighting device 1A is manufactured.

The LED cover 17 has a function of guiding a light beam emitted from a plurality of LED element groups 15b to the front side (floor side), and a function of pressing the LED light source substrate 15 to the heat sink 14 in close contact with each other.

The LED cover 17 is integrally molded by injection molding or the like using a resin having translucency and electrical insulating properties such as polystyrene or polycarbonate. In particular, it is preferred to use polystyrene in terms of transparency, cost, and formability. In addition, the material used for the LED cover 17 is not limited to a resin, and may be glass or the like as long as it has translucency and electrical insulation.

Further, the LED cover 17 has a substantially circular LED cover portion 17a that covers the entire light-emitting surface of the LED light source substrate 15 (the surface on which the LED element group 15b is mounted), and the outer peripheral portion of the LED cover portion 17a toward the back surface. A cylindrical wall portion 17b that extends on the side (ceiling side) and a flange portion 17c that protrudes outward in the radial direction from the upper end (back side) of the wall portion 17b. The flange portion 17c extends in the circumferential direction and is divided into three.

The center cover 18 is formed by a mounting adapter (not shown) exposed at the center of the apparatus body, for example, by a flame-retardant synthetic resin (for example, PP: polypropylene resin). Further, the center cover 18 is formed in a disk shape and is detachably attached to the LED cover 17.

The light shielding member 19 is made of a resin having transparency (including transparent, translucent, or milky white) (for example, acrylic or polystyrene). It is made up of a dome. Further, the light shielding member 19 serves to diffuse the light beam emitted from the light source (LED element group 15b), thereby reducing the glare when the user directly views the LED illumination device 1A or homogenizing the brightness of the space in which the LED illumination device 1A is disposed. character of. Further, the shade 19 is detachably held by the accommodating member 14d of the heat sink 14.

The annular member 20 is configured such that the inner peripheral side of the annular portion is held on the outer peripheral side of the shade 19 and the outer peripheral side of the annular portion protrudes beyond the outer periphery of the shade 19 . Further, the annular member 20 is formed of a material having light transmissivity.

The sensor unit 21 provides, for example, a function of changing the supply power to the LED element group 15b in accordance with the brightness of the environment (space) in which the LED illumination device 1A is provided, and obtaining a certain illuminance under the LED illumination device 1A. . Further, the illuminance under the LED lighting device 1A is detected.

Fig. 4 is a longitudinal sectional view showing the LED lighting device according to the first embodiment.

As shown in FIG. 4 (also shown in FIG. 1), the LED cover portion 17a is formed with a circular through hole 17a1 at a central portion in the radial direction. Further, in the LED cover portion 17a, a dome-shaped portion 17a2 is formed at a position corresponding to each of the LED element group 15b (daylight color LED 15b1, light bulb color LED 15b2, and blue LED 15b3) corresponding to the LED light source substrate 15A. Further, the dome-shaped portion 17a2 is a lens function, and the light beams from the daylight color LED 15b1, the bulb color LED 15b2, and the blue LED 15b3 are given. Diffusion, etc.

Further, in the LED cover 17, the LED cover portion 17a is screwed to the substrate supporting portion 14a of the heat dissipation plate 14, and the flange portion 17c is screwed to the annular portion 14c of the heat dissipation plate 14.

The wall portion 17b is formed to extend in a direction slightly orthogonal to the LED cover portion 17a. Further, a notch (not shown) is formed in the wall portion 17b so that heat inside the LED cover 17 can be made to escape to the outside. Further, the opening area of the slit is set to a size in which the user's finger cannot be inserted. Thereby, it is possible to prevent the user from directly contacting the LED light source substrate 15A with the hand (finger).

The flange portion 17c fixes the LED cover 17 to the fixing portion of the heat dissipation plate 14 on the outer peripheral side of the LED light source substrate 15A.

Fig. 5 is a control block diagram showing the LED lighting device according to the first embodiment.

As shown in FIG. 5, the LED lighting device 1A operates by supplying electric power from a power source PS (or a commercial power source) and a power source circuit 130. The power supply circuit 130 has a function of adjusting the power of the power source PS to a predetermined voltage or current.

Further, the LED lighting device 1A includes a light receiving unit 110. The light receiving unit 110 has a function of receiving a signal (for example, infrared light) output from the remote controller 120 by the button operation of the remote controller 120, and transmitting the received signal to the control unit 101.

The remote controller 120 has a button (not shown) operated by a person, and has a function of outputting a signal set with respect to the operated button. can. For example, a full light mode, a brightness boost mode, a blue LED add mode, a brightness boost mode, a blue LED add mode, and the like can be set.

Next, a description will be given of a function example of the LED lighting device 1A. The LED lighting device 1A includes a control unit 101, three lighting circuits 102, 103, and 104, and three types of daylight color LEDs 15b1, a light bulb color LEDs 15b2, and a blue LEDs 15b3 (light sources). In addition, the LED 15b4 for the safety light described in FIGS. 2 and 3 is omitted.

The control unit 101 includes a microcomputer and the like, and has a function of receiving a signal received by the light receiving unit 110, and generating a control signal for controlling the lighting circuits 102, 103, and 104. The control signal is, for example, a PWM (Pulse Width Modulation) signal. The control unit 101 is configured by a CPU (Central Processing Unit) and a main memory, and expands an application stored in a memory unit (not shown) in the main memory to realize the function.

The lighting circuits 102, 103, and 104 have a function of driving the daylight color LED 15b1, the light bulb color LED 15b2, and the blue LED 15b3 based on a control signal received from the control unit 101. Further, the lighting circuits 102, 103, and 104 have a function of individually changing the driving currents for driving the daylight color LEDs 15b1, the bulb color LEDs 15b2, and the blue LEDs 15b3 based on the control signals received from the daylight color LEDs 15b1 and the control unit 101. .

Fig. 6(a) is a spectral distribution diagram of a daylight color LED, (b) is a spectral distribution diagram of a bulb color LED, and (c) is a spectrum distribution diagram of a blue LED. In addition, in this embodiment, it is in the spectral distribution map. The surface is illustrated by the relationship between the wavelength and the radiation intensity, but the relationship between the wavelength and the energy ratio also exhibits a waveform having the same peak wavelength.

As shown in Fig. 6(a), the daylight-colored LED 15b1 has a peak wavelength in the range of 430 nm to 460 nm, and in the present embodiment, a peak wavelength is used at 450 nm. In addition, the color temperature of the daylight color LED 15b1 is 6500K (Kelvin).

As shown in FIG. 6(b), the bulb color LED 15b2 has a peak wavelength in the range of 550 nm to 650 nm, and in the present embodiment, a peak wavelength is used at 610 nm. In addition, the color temperature of the bulb color LED 15b2 is 2700K.

In addition, the color temperature of the daylight color LED 15b1 and the light bulb color LED 15b2 is not limited to 6500K or 2700K as long as the color temperature of the light generated by the daylight color LED 15b1 or the light bulb color LED 15b2 becomes white.

As shown in FIG. 6(c), the blue LED 15b3 has a peak wavelength in the range of 450 nm to 480 nm, and in the present embodiment, a peak wavelength is used at 475 nm.

Fig. 7 (a), (a) is a spectrum distribution diagram in which (a), (b), and (c) of Fig. 6 are stacked, and Fig. 7 (b) is a spectrum in the case where a blue LED is added to all lamps. The distribution map, FIG. 7(c) is a spectral distribution diagram of the brightness enhancement mode and a spectral distribution map of the blue LED mode added to the brightness enhancement mode. In addition, in Fig. 7(b), the spectral distribution of sunlight of 5800K is simultaneously illustrated.

In addition, it is known that human sensitivity to light is related to age. The change, especially in the elderly, is less sensitive to light near the wavelength of 470 nm to 480 nm. In the case of using a white LED (a yellow phosphor placed on a blue LED) as a light source, as shown in Fig. 7(a), the characteristics of wavelength-radiation intensity, daylight color LED 15b1 and bulb color The characteristics of LED15b2 are slightly the same, and the radiation intensity is reduced near the wavelength of 450 nm to 480 nm. Further, the all-lamp mode (6099 lm, 4800 K) in which both the daylight-colored LED 15b1 and the bulb-colored LED 15b2 are simultaneously turned on has the same characteristics, and the radiation intensity is lowered in the vicinity of the wavelength of 450 nm to 480 nm. For this reason, not only the elderly, but also the radiation intensity of 470 nm to 480 nm becomes weak, making it difficult to see the subject of writing and the like.

Therefore, in the present embodiment, as shown by a thick solid line in FIG. 7(b), the all-lamp mode in which the daylight color LED 15b1 and the bulb color LED 15b2 are simultaneously (commonly) illuminated is added by adding the blue LED 15b3. When the light is turned on, the daylight color LED 15b1, the light bulb color LED 15b2, and the blue LED 15b3 are simultaneously lit, so that the radiation intensity at 450 nm to 480 nm can be improved. Thereby, the color temperature can be made close to the waveform of the 5800K spectrum of sunlight, and the text such as writing becomes easy to see.

Further, as shown by the alternate long and two short dashes line in FIG. 7(c), even in the daylight color LED 15b1 and the bulb color LED 15b2, a current of 1.2 times (a predetermined magnification larger than 1) when the full lamp mode is passed (brightness boost mode) ), it still has the above-mentioned characteristics that the radiation intensity of 450 nm to 480 nm is lowered (it becomes unsightly, etc.).

Therefore, as shown by the thick solid line in Fig. 7(c), in the brightness enhancement mode (two-dot chain line) of Fig. 7(c), the blue LED 15b3 is added and lit, so that it is like Fig. 7(b). The thick solid line can eliminate the decrease of the radiation intensity from 450nm to 480nm, and the text becomes easy to see. In addition, it also makes it easy to see the effect of the object.

Figure 8 is a schematic diagram showing the relationship between color temperature and light beam. The horizontal axis of Fig. 8 represents the color temperature (K), and the vertical axis represents the light beam (lm: lumen).

The point 200 in Fig. 8 indicates the maximum value of the range of the brightness of the room determined by the Japanese lighting industry (hereinafter referred to as "the maximum value of the beam suitable for the breadth of the room"). At this point 200, the current values of the daylight color LED 15b1 and the bulb color LED 15b2 are given, and a margin is given with respect to the rating.

The area 250 of the additional point indicates the range in which either or both of the color adjustment and the dimming can be performed in the normal mode.

At point 210, the system control unit 101 receives the light beam and the color temperature when the indication of the "brightness enhancement mode" of the light beam is further increased than the point 200. When receiving the instruction of the brightness enhancement mode, the control unit 101 flows, for example, so that a current of 1.2 times the current value of the daylight color LED 15b1 and the light bulb color LED 15b2 flows in the "all lamp mode" (rated output). The way to control. The color temperature of point 210 is the color temperature of the same point 200. The light beam at point 210 is increased by each of a plurality of daylight color LEDs 15b1 and a plurality of light bulb color LEDs 15b2, so that the amount of dimming rate or current value per one is compared with that of a part of the daylight color LED 15b1 Or the bulb color LED 15b2 may increase the beam to the same extent.

Point 221 is a "fluorescent lamp mode" obtained in the case where the daylight color LED 15b1 is separately driven. Point 222 is a "bulb color mode" obtained in the case where the light bulb color LED 15b2 is separately driven.

At point 223, the "lightning mode of the library" is known by the coloring of the daylight color LED 15b1 and the light bulb color LED 15b2. The "Library Brightness Mode" sets the color temperature to be lower than the fluorescent mode and 5000K higher than the light bulb mode, and further sets the light beam to 5900 lm higher than the fluorescent light mode and the light bulb mode.

Point 224 is a "table mode" obtained by coloring the daylight color LED 15b1 and the light bulb color LED 15b2. This "table mode" sets the color temperature to be lower than the fluorescent mode and 3700K higher than the light bulb mode, and further sets the light beam to be lower than the fluorescent light mode and about 3650 lm higher than the light bulb mode.

In this way, "Fluorescent Light Mode", "Light Bulb Color Mode", "Library Brightness Mode" and "Table Mode" are those that have slightly the same characteristics as the "Full Light Mode" and have a radiation intensity at a wavelength of 450 nm~ Characteristics that become lower near 480 nm.

Therefore, in the present embodiment, as shown by the arrow 230 in FIG. 8, the "blue light LED addition mode" in which the blue LED 15b3 is added and turned on is added to the "all-lamp mode" of the point 200, and the color temperature is close to the sun. The 5800K of light makes the text easier to see.

In addition, in "full light mode", in the daylight color LED 15b1 The "brightness boosting mode" in which 1.2 times of the current is applied to the bulb color LED 15b2 also has a characteristic that the radiation intensity is low in the vicinity of the wavelength of 450 nm to 480 nm.

Therefore, in the present embodiment, the "blue LED addition mode" in which the blue LED 15b3 is added and turned on is added to the "brightness enhancement mode" of the point 210, and the color temperature is close to the 5800K of the sunlight, so that the characters are easily changed. The effect and easy to see the effect of the object.

Fig. 9 is a table showing the visibility of characters and the like of each mode. In addition, in Fig. 9, "○" indicates "easy to see", one "◎" is "more visible", and two "◎" are "more visible."

In Fig. 9, No. 1 is "light bulb color mode", No. 2 is "table mode", No. 3 is "library mode of library", No. 4 is "fluorescent mode", No. 5 is "Full lamp mode". No.1~No.5, the result of "Easy to see".

In addition, in Fig. 9, No. 6 is a "brightness boosting mode" (1.2 times the current value of "all-lamp mode"). In this case, the result is "more visible".

In addition, No. 7 in Fig. 9 is a case where a plurality of patterns are collected and described, and the "blue LED addition mode" is added to the "light bulb color mode" of No. 1, and the "table mode" of No. 2 is added. In the case of the "Blue LED Addition Mode", the "Blue LED Add Mode" is added to the "Library Brightness Mode" of No. 3, and the "Blue LED Addition" is added to the "Fluorescent Mode" of No. 4. In the case of "mode", the "blue LED addition mode" is added to the "all-lamp mode" of No. 5. turn off For this reason, the results are "more visible" with respect to the patterns No. 1 to No. 5 (addition of no blue LED 15b3). In this "Bulb Color Mode + Blue LED Add Mode", "Table Mode + Blue LED Add Mode", "Library Brightness Mode + Blue LED Add Mode", "Fluorescent Light Mode + Blue LED Addition" The mode can compensate for the low radiation intensity of 450nm to 480nm, and the blue LED 15b3 is added to each mode, so that even if the current value is not 1.2 times as in No. 6, the radiation intensity in the range of 450 nm to 480 nm can be made close. The wavelength of 450nm~480nm of sunlight (5800K) makes the text easier to see.

In addition, in FIG. 9, No. 8, the "blue LED addition mode" is added to the "brightness enhancement mode" of No. 6. In this case, the result of "more visible" is obtained with respect to the "brightness enhancement mode" (addition of no blue LED 15b3).

As described above, the LED lighting device 1A of the first embodiment includes the daylight color LED 15b1, the bulb color LED 15b2, the blue LED 15b3, and the control unit 101 for controlling the daylight color LED 15b1, the bulb color LED 15b2, and the blue LED 15b3. The unit 101 turns on the daylight color LED 15b1, the bulb color LED 15b2, and the blue LED 15b3 at the same time. According to this, in the all-lamp mode in which the daylight color LED 15b1 and the bulb color LED 15b2 are driven at the rated output, the blue LED 15b3 is added and turned on, so that the region where the radiation intensity of the wavelength 450 nm to 480 nm is lowered can be compensated, and the color temperature can be made close. The 5800K of the sun's light is easy to see.

Further, in the first embodiment, not only the daylight color In the "full light mode" in which the LED 15b1 and the light bulb color LED 15b2 are driven by the rated output, the blue LED 15b3 is added, and the blue LED 15b3 may be added to the "fluorescent light mode" in which only the daylight color LED 15b1 is driven. The blue LED 15b3 is added to the "light bulb color mode" in which the light bulb color LED 15b2 is driven, and the blue LED 15b3 is added to the "library mode of the library" obtained by coloring the daylight color LED 15b1 and the light bulb color LED 15b2. The "table mode" obtained by the coloring of the daylight color LED 15b1 and the light bulb color LED 15b2 is added to the blue LED 15b3. For this configuration, the blue LED 15b3 can be used to compensate for the wavelength of 450 nm to 480 nm, so that the characters and the like are easy to see as described above.

Further, in the first embodiment, the "blue LED addition mode" is added to the "all-lamp mode", so that characters and the like are made easy to see, and objects can be easily seen. In the present embodiment, a case where a current of 1.2 times the full lamp mode flows is described as an example. However, if the current is not limited to this, a current higher than 1.2 times or a ratio lower than 1.2 times is used. Flow through, so you can set the brightness boost mode.

Further, in the present embodiment, a plurality of daylight color LEDs 15b1 are arranged concentrically, and a plurality of light bulb color LEDs 15b2 are arranged in the circumferential direction with the daylight color LEDs 15b1 interposed therebetween, and the blue LEDs 15b3 are annularly arranged in the daylight color. Between the LED 15b1 and the bulb color LED 15b2. According to this configuration, the wiring board used for the daylight color LED 15b1 and the bulb color LED 15b2 and the wiring board used for the blue LED 15b3 can be configured by one wiring board 15a, so that it can be inexpensively constructed, and even The assembly work can be simplified. In addition, it is possible to prevent the shade 9 from being reflected in the blue annular shadow.

(Second embodiment)

Fig. 10 is an exploded perspective view showing the LED lighting device according to the second embodiment.

As shown in FIG. 10, the LED lighting device 1B (illuminating device) is a main body base 111, an adapter housing portion 112, a power source substrate 113, a heat dissipation plate 114, a first LED light source substrate 115, an LED cover 116, and a reflection sheet 117. The light shielding member 118, the safety lamp cover 119, the second LED light source substrate 121, the center cover 122, the sensor unit 123, the light guide plate (light guide) 131, the ring cover 132, the light guide 133 (light guide), and the like Composition.

The main body base 111 is formed by processing a steel plate (for example, SPCC) into a member having a substantially circular shape, and is formed in a slightly concave shape so that the concave surface faces the floor side. Further, in the center of the main body base 111, an adapter mounting hole 111a to which an adapter (not shown) is attached is formed.

Further, on the upper surface of the body base 111, an annular filler 111b is fixed. Thereby, the gap between the main body base 111 and the ceiling surface is sealed by the filler 111b, so that dust or the like can be prevented from entering the apparatus body.

The adapter accommodating portion 112 is formed of a flame retardant synthetic resin (for example, PBT: polybutylene terephthalate resin), and has an annular fixing portion 112a fixed to the body base 111, and a fixing portion therefrom. a cylindrical portion extending from the inner peripheral portion of the 112a toward the floor side (downward) 112b. In the cylindrical portion 112b, a locking hole 112c for locking a safety lamp cover 119 to be described later is formed.

The power source substrate 113 has a lighting circuit board or the like and is fixed to the body base 111 through an insulating plate (not shown). Further, the insulating sheet is molded of a resin material such as polypropylene having electrical insulating properties and flame retardancy. Thereby, the power source substrate 113 is disposed in a heat dissipation space surrounded by the main body base 111 and a heat dissipation plate 114 to be described later, and is maintained in a state of maintaining electrical insulation.

Further, the power source substrate 113 is electrically connected to a mounting adapter (not shown) through a wire (not shown). Thereby, the LED lighting device 1B is supplied with power through the indoor wiring device (not shown), the mounting adapter (not shown), and the power source substrate 113.

The heat sink 114 is formed by processing a steel sheet into a substantially round shape, and is formed of a metal having good thermal conductivity such as a galvanized steel sheet. Further, the heat dissipation plate 114 is formed to have a larger diameter than the main body base 111, and is formed to be attached to the main body base 111 so as to protrude radially outward from the main body base 111.

Further, a circular through hole 114a is formed at a position in the radial direction of the heat dissipation plate 114 at a position corresponding to the cylindrical portion 112b of the adapter housing portion 112. Further, a screw hole 114b for screwing the first LED light source substrate 115, which will be described later, is formed in a plurality of places on the outer peripheral portion of the heat radiating plate 114 in the circumferential direction. Further, on the outer peripheral side of the screw hole 114b of the heat radiating plate 114, the hanging holes 114c and 114c for suspending the storage device 140 to be described later are formed in plural places. The hanging holes 114c and 114c are arranged at intervals of 120° in the circumferential direction. In addition, The heat radiating plate 114 is formed in the vicinity of each of the hanging holes 114c, and is formed with a screw hole 114d for screwing the storage device 140 to the heat radiating plate 114. Further, the heat radiating plate 114 is formed into circular grooves 114e and 114f or linear grooves 114g at the time of forming, thereby improving the strength of the heat radiating plate 114.

The first LED light source substrate 115 includes a ring-shaped wiring board 115a and a plurality of LED element groups 115b arranged in a line on one surface side (ground side) of the wiring board 115a, and is mounted on the outer periphery of the heat dissipation plate 114. . In addition, the LED element group 115b is configured by, for example, a daylight color LED 115b that emits daylight color and a light bulb color LED 115b2 that emits light of a light bulb color, and each element is alternately arranged in the circumferential direction. For example, the bulb color LED 115b2 is disposed sandwiching the two daylight color LEDs 115b1. Thereby, light of three colors of light bulb color, light bulb color + daylight color, and daylight color can be emitted, and a light adjustment mechanism can be further added to the LED element group 115b so that light of a finer color can be radiated.

In the wiring board 115a, for example, an insulating layer, a copper foil pattern, or the like is formed on a substantially annular metal plate made of an aluminum alloy, or a copper foil is formed on a flat plate of a resin having excellent thermal conductivity (for example, a polyimide resin). The pattern, the solder resist layer, and the like are formed.

Further, the wiring board 115a is a screw insertion hole 115c through which a screw (not shown) is inserted when the first LED light source board 115 is screwed to the heat sink 114, and is formed at a plurality of places at intervals in the circumferential direction.

In the present embodiment, the main body base 111 and the heat dissipation plate 114 having the above-described configuration are provided, so that the volume of the heat release space can be increased (the amount of air in the heat release space is increased), and the power source substrate 113 and the first LED can be obtained. The heat dissipation efficiency of the light source substrate 115 is improved. As a result, the luminous efficiency of the LED element group 115b can be improved.

The LED cover 116 is formed in a ring shape so as to cover the entire first LED light source substrate 115. Further, the LED cover 116 is formed into a film shape by a colorless transparent synthetic resin (for example, PET: polyethylene terephthalate resin). Thereby, when the user sets the LED lighting device 1B, the user can be prevented from touching the first LED light source substrate 115. In other words, in the LED lighting device 1B of the present embodiment, the user attaches and detaches the light guide plate 131, so that the user does not touch the first LED light source substrate 115 when the light guide plate 131 is attached or detached.

Further, the LED cover 116 is at a position corresponding to the screw insertion hole 115c, and the screw insertion hole 116a is formed at a plurality of places. Further, although not shown, it is also possible to prevent the LED cover 116 from being unstable by the individual restraining members.

The reflection sheet 117 has a function of reflecting light emitted from the LED element group 115b toward the ceiling side to the floor side, and is formed in a doughnut shape (annular shape) in plan view. Further, the reflection sheet 117 is formed of a white resin sheet. Further, in the present embodiment, the case where the reflection sheet 117 is provided is described as an example, but the invention is not limited thereto, and the heat dissipation plate 114 may be configured to be highly reflective coated.

The light-shielding member 118 has a function of suppressing light leakage from the LED element group 115b to the inside of the light guide plate 131, and is formed into a ring shape by, for example, ABS (Acrylonitrile Butadiene Styrene) resin. Further, the light shielding member 118 suppresses the outer peripheral portion of the reflection sheet 117 117a.

The safety lamp cover 119 is formed in a ring shape so as to cover the second LED light source substrate 121 to be described later. Further, the safety lamp cover 119 is formed of a material having light transmissivity, and a hook portion 119a for hooking the safety lamp cover 119 to the fixing portion 112a is formed on the inner peripheral edge portion.

The second LED light source substrate 121 has a wiring board 121a. The warm color LED element 121b used as a security light and the blue LED 121c emitting blue light are alternately arranged in the circumferential direction. . In addition, the second LED light source substrate 121 is disposed on the inner side in the radial direction of the first LED light source substrate (in the present embodiment, the innermost circumference).

The center cover 122 is formed by covering a mounting adapter (not shown) exposed at the center of the apparatus body, for example, by a flame-retardant synthetic resin (for example, PP: polypropylene resin). Further, the center cover 122 is formed in a disk shape and is detachably attached to the safety lamp cover 119.

The sensor unit 123 provides, for example, a function of changing the supply power of the LED element group 115b in accordance with the brightness of the environment (space) in which the LED illumination device 1B is provided, and obtaining a certain illuminance under the LED illumination device 1B. . Further, the sensor unit 123 detects the illuminance under the LED lighting device 1B. Further, the sensor unit 123 is configured to house a sensor substrate (not shown) in a sensor case 123a formed of an ABS resin, a polypropylene resin, or the like, and is attached to the ceiling of the heat dissipation plate 114. side.

The light guide plate 131 has a function of guiding a light beam emitted from a plurality of LED element groups 115b to the floor side, and is located on the outermost side (floor side and outer surface side) of the LED illumination device 1B as a cover member of the LED illumination device 1B. The function. In this manner, the light guide plate 131 is disposed on the outermost side (floor side and outer side) so that the performance of the LED element group 115b can be utilized to the utmost. Further, since the milky white cover member is not provided on the outer side of the light guide plate 131, the LED lighting device 1B can be made thinner.

In addition, the light guide plate 131 is integrally molded by, for example, injection molding or the like using a resin having light transmissivity and electrical insulation formed of PMMA (polymethyl methacrylate resin). In addition, the material of the light guide plate 131 is not limited to PMMA, and may be any resin such as polystyrene resin or polycarbonate resin as long as it has light transmissivity and electrical insulation, and is not limited to resin. It can also be glass or the like.

In addition, the light guide plate 131 is formed in a dish shape so that the concave surface faces the ceiling side, and the flange portion 131a that is detachably held by the storage device 140 is formed on the outer circumference of the light guide plate 131. The flange portion 131a is formed at three locations on the outer peripheral edge portion of the light guide plate 131.

Further, a concave portion 131c having a circular shape in plan view is formed in the center of the surface of the light guide plate 131. In addition, the concave portion 131c is a portion where a gate mark (resin filling mark) is formed when the light guide plate 131 is formed, and a gate mark remaining after the injection molding is covered with the light guide 133 to cover the hidden stage. difference.

The ring cover 132 is disposed so as to overlap from the flange portion 131a of the light guide plate 131, so that the flange portion 131a cannot be viewed from the floor side. By.

The light guide 133 is formed of the same material as the light guide plate 131, and is formed in a disk shape (coin shape) having a small diameter. Further, the light guide 133 is fitted into the concave portion 131c formed in the light guide plate 131, and is fixed by an adhesive or the like. Further, the light guide 133 is formed in a concentric manner to form a groove 133a, and the light guide plate 131 on the outer side emits light.

The storage device 140 is formed by detachably holding the light guide plate 131, for example, by a synthetic resin such as POM (paraformaldehyde).

Fig. 11 is a perspective cross-sectional view showing an LED lighting device according to a second embodiment. In addition, FIG. 11 is shown in a state in which it is cut in half by the center of the radial direction of the LED illumination device 1B.

As shown in FIG. 11, a plurality of grooves 131d are formed concentrically on the inner surface of the light guide plate 131. In this manner, the groove 131d is formed on the inner surface of the light guide plate 131, so that dust or the like can be prevented from being accumulated in the groove 131d, and the light can be stably emitted.

Further, the groove 131d is formed entirely of the other than the concave portion 131c. Thereby, the light of the LED element group 115b can be diffused to the entire center portion including the light guide plate 131. Further, the interval s between the adjacent grooves 131d is formed to be gradually narrowed from the outer side in the radial direction toward the center side. Thereby, it is possible to uniformly emit light from the outer periphery of the radial direction over the inner circumference. Further, although not shown, the embossing is further performed in each of the grooves 131d. Thereby, the light can be diffused over the entire surface of the light guide plate 131.

Figure 12 is an enlarged view of a portion A of Figure 11.

As shown in FIG. 12, the light guide plate 131 has a group of LED elements. 115b is incident on the incident portion 131i of the LED element group 115b (the daylight LED 115b1 and the bulb color LED 115b2), and the light incident from the incident portion 131i is included in the center portion of the light guide plate 131, and is emitted from the whole. The exit portion 131o.

The incident portion 131i is formed in an annular shape along the arrangement of the LED element group 115b in a portion corresponding to the thickness of the light guide plate 131.

The emitting portion 131o has a curved portion 131o1 extending from the incident portion 131i toward the floor side, and a flat portion 131o2 formed in a disk shape in the horizontal direction.

When the light of the LED element group 115b is incident from the incident portion 131i, the light is guided into the light guide plate 131, and the light is emitted from the emission portion 131o to the outside of the light guide plate 131 (floor side). Further, the light-shielding member 118 prevents the light incident on the incident portion 131i from leaking to the inside of the light guide plate 131.

Further, in the second embodiment, the control unit 101 (see FIG. 5) similar to that of the first embodiment can control the daylight color LED 115b1, the bulb color LED 115b2, and the blue LED 121c. Further, as described with reference to FIGS. 8 and 9, various modes can be set.

In other words, in the "all-lamp mode" in which the daylight color LED 115b1 and the bulb color LED 115b2 are lit with the rated output, the "blue LED addition mode" in which the blue LED 121c is added and turned on is added, so that the wavelength can be compensated for 450 nm to 480 nm. The radiation intensity, so the text becomes easier to see. In addition, the current of 1.2 times in the full lamp mode is respectively applied to the daylight color. The LED 115b1 and the light bulb color LED 115b2 make the text easier to see and at the same time easy to see. In addition, the addition of the "Blue LED Add Mode" to the "Light Bulb Color Mode", "Table Mode", "Library Light Mode" and "Fluorescent Light Mode" also makes the text easier to see.

In the second embodiment, the daylight-colored LEDs 115b1 are arranged in a ring shape in a row, and are disposed on the radially inner side (the innermost circumference side) of the daylight-color LED 115b1 and the bulb-color LED 115b2. According to this, it is possible to divide the two substrates of the first LED light source substrate 115 and the second LED light source substrate 121 into a minimum substrate area, and it is possible to inexpensively form the substrate in a case where the substrate is disposed in one piece.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit and scope of the invention. For example, in the above-described embodiment, the LED lighting devices 1A and 1B including the daylight color LEDs 15b1 and 115b1, the light bulb color LEDs 15b2 and 115b2, and the blue LEDs 15b3 and 121c are described as an example, but may be 4700K or 5000K. The white LED is added to the blue LEDs 15b3 and 121c.

Further, the shape of the LED illumination devices 1A and 1B is not limited to a circular shape, and may be other shapes such as an angular shape such as a square angle or a polygonal shape.

15A‧‧‧LED light source substrate

15a‧‧‧Wiring substrate

15b‧‧‧LED component group

15b1‧‧‧ Daylight LED

15b2‧‧‧Light bulb color LED

15b3‧‧‧Blue LED

15b4‧‧‧LEDs for safety lights

Claims (4)

A lighting device characterized by comprising: a daylight color LED that emits daylight color; a light bulb color LED that emits light of a light bulb color; a blue LED that emits blue light; and the aforementioned daylight color LED, the aforementioned light bulb color LED And a control unit for controlling the blue LED; wherein the control unit lights up at least one of the daylight color LED and the light bulb color LED and the blue LED at the same time. The illuminating device according to claim 1, wherein the control unit is configured to display the daylight color LED and the light bulb color LED in a full lamp mode when the state is driven by a rated output. The bulb color LED is driven to flow with a current larger than a magnification of one in the all-lamp mode. The illuminating device according to claim 1 or 2, wherein the daylight color LEDs are arranged concentrically, and the bulb color LEDs are arranged in the circumferential direction with the daylight color LEDs interposed therebetween, the blue color The LED is disposed in a ring shape between the daylight color LED and the bulb color LED. The illuminating device of claim 1 or 2, wherein the daylight color LEDs are arranged in a row of annular shapes, and the bulb color LEDs are arranged in a circumferential direction to the aforementioned daylight color LEDs. The blue LED is disposed on the radially inner side of the daylight color LED and the light bulb color LED.