JP2012049033A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting apparatus which has useful functions.SOLUTION: When a plurality of light-emitting diodes in a light source section are subject to a limitation on the number of pieces which can be switched on, the power supplied to each diode is increased by making use of an excess capacity of a heat radiation section. When the illumination range is narrowed by a switch-on limitation, the increased power supply to each diode helps to brighten the inside of the illumination range. The plurality of light-emitting diodes are disposed in a three-dimensional layout by placing them on a curved flexible board, whereby directions of irradiation are condensed. The illumination range can be shifted, without the need for a moving unit, by only changing the light-emitting diodes to be switched on. When the light-emitting diodes become dark, their color temperatures are also lowered, thereby simulating the filament emission of an incandescent lamp. A color temperature storage unit is provided. The duty cycles on one or both sides of plural types of light-emitting diodes differing in color temperature are changed as appropriate depending on situation, by which a change of color temperatures is realized.

Description

The present invention relates to a lighting device.

Conventionally, various illumination devices have been proposed for various purposes. Fluorescent lamps are generally used as light sources used in lighting devices, but in recent years, the use of LEDs has also advanced. Various proposals have also been made regarding the control of the lighting device. For example, a kitchen having a switch device with a non-contact type sensor such as an infrared ray for detecting the human body and controlling the on / off operation of the light source device on the front surface of the illumination device as a light source when cooking work on the top plate A device has been proposed. And it has been proposed that the detection range in the vertical direction of the sensor be set between a surface substantially in front of the top plate in front of the sensor and a virtual extension surface from the front of the sensor to the front edge of the top plate. (Patent Document 1) Further, in a similar kitchen apparatus, the sensor detection range includes a virtual vertical surface extending downward from the front surface of the ceiling-type cabinet for the top plate information and a surface substantially horizontal to the top plate in front of the sensor front surface. In addition, it has been proposed to set a range surrounded by a virtual extension surface from the front of the sensor to the front edge of the top plate. (Patent Document 2) On the other hand, in a toilet room having a lighting unit in which the brightness and color can be changed, a switch of a lighting control box that correctly writes the lighting unit is composed of a non-contact reflective sensor. Yes. (Patent Document 3)
JP-A-3-233804 JP-A-3-277313 JP-A-5-166586

However, there are many problems to be further studied regarding the function of the lighting device.

The subject of this invention is providing the illuminating device which has a useful function in view of the above.

  In order to achieve the above object, the present invention provides a light source unit including a plurality of light emitting diodes, a power source unit that supplies power to the light source unit, and controls the actual number of lighting of the plurality of light emitting diodes and emits light in a substantially lit state. There is provided a lighting device including a control unit that increases an allowable power that can be supplied to each light emitting diode that is substantially in a lighting state when the number of diodes is limited.

  According to the above feature, it is possible to realize a suitable relationship between the number of issuance orders that are in a substantially light emitting state and the consideration supplied to each issuance charge code. The power supply can be adjusted, for example, by changing the amount of current supplied to the light emitting diode or changing the duty cycle.

  According to a specific feature of the present invention, the light source unit has a heat radiating part of the light emitting diode, and the allowable power is determined according to the heat radiating capability of the heat radiating part. As a result, for example, when the number of light emitting diodes in a substantially light emitting state is limited, there is a surplus in the heat dissipating capacity of the heat dissipating part. it can.

  According to another specific feature of the present invention, the light source unit changes the width of the illumination range by changing the number of light emitting diodes in a substantially lit state. For example, the illumination range is narrowed by limiting the number of light emitting diodes in a substantially light emitting state. In this case, by increasing the allowable power that can be supplied to each light emitting diode when the illumination range becomes narrow, it becomes possible to illuminate the illumination range narrowed in a spot shape more brightly.

  According to another aspect of the present invention, a light source unit including a plurality of light emitting diodes, a power source unit that supplies power to the light source unit, and a lighting range by controlling a substantial number of lighting of the plurality of light emitting diodes. There is provided an illuminating device having a control unit to be changed. This makes it possible to change the width of the illumination range even without a movable part. However, this does not prevent the combined use with the movable part.

  According to the specific feature of the present invention, the control unit increases the power supplied to each light emitting diode that is substantially lit when the illumination range is narrowed by limiting the number of light emitting diodes that are substantially lit. Let This makes it possible to illuminate the illumination range narrowed in a spot shape more brightly. Thus, for example, it is possible to provide a simulated illumination situation familiar to the change of the illumination range by the movable part, such as when the illumination range is illuminated brighter when the illumination range is narrowed by the optical system.

  According to a specific feature of the present invention, the illumination range of each light emitting diode is determined by arranging a plurality of light emitting diodes three-dimensionally. More specifically, a plurality of light emitting diodes are provided on a planar flexible substrate, and the plurality of light emitting diodes are three-dimensionally arranged by bending them. This makes it possible to determine a suitable illumination range using individual light-emitting diodes having a relatively wide illumination range, without condensing means and movable parts. However, this does not prevent the combined use with the light collecting means and the movable part.

  According to another aspect of the present invention, there is provided a light source unit including a plurality of light emitting diodes, a power source unit that supplies power to the light source unit, and a light emitting diode that controls a substantial lighting state of the plurality of light emitting diodes and is in a substantially lighting state. There is provided a lighting device including a control unit that shifts the lighting range by changing the lighting range. This makes it possible to shift the illumination range even without moving parts. However, this does not prevent the combined use with the movable part.

  According to another aspect of the present invention, the light source unit including the light emitting diode, the power source unit that supplies power to the light source unit, the brightness of the light source unit is changed, and the brightness of the light source unit is interlocked with the change in brightness. There is provided a lighting device having a controller that automatically changes the color temperature.

  With the above features, for example, it is possible to provide a simulated lighting situation familiar with the relationship between the power supply and the color temperature of the filament of the incandescent bulb and the change in the color temperature of the sun during the daytime and dusk. According to an example of a more specific feature, the light emitting unit can be turned on at night with the minimum brightness and the minimum color temperature, thereby alleviating the uncomfortable feeling of darkening the illumination while the color temperature remains high. it can.

  According to another aspect of the present invention, a light source unit including a light emitting diode, a power source unit that supplies power to the light source unit, a control unit that changes the color temperature of the light source unit, and a color temperature controlled by the control unit are stored. There is provided a lighting device having a storage unit. This facilitates reproduction of a suitable color temperature once set in various scenes, control of a suitable color temperature according to brightness, and the like.

  According to another aspect of the present invention, a light source unit including a plurality of types of light emitting diodes having different color temperatures, a power source unit that supplies power to the light source unit, and the illumination color temperature as a whole is changed by selecting the light emitting diodes. In addition, an illumination device is provided that includes a control unit that performs different controls on a plurality of types of light-emitting diodes based on the relationship between brightness and color temperature. Thus, the color temperature can be flexibly changed in various scenes.

  According to the specific feature of the present invention, for example, the control unit changes the illumination color temperature as a whole by changing the power supply to the light emitting diode having a high color temperature among a plurality of types of light emitting diodes. According to another specific example, the control unit changes the illumination color temperature as a whole by changing the power supply to the light emitting diode having a low color temperature among the plurality of types of light emitting diodes. According to still another specific example, the control unit changes the illumination color temperature as a whole by changing the power supply to the plurality of types of light emitting diodes.

  As described above, according to the present invention, a lighting device having a useful function can be provided.

It is a block diagram which shows Example 1 of the illuminating device which concerns on embodiment of this invention. Example 1 1 is a circuit block diagram of Embodiment 1. FIG. FIG. 2 is a conceptual plan view of a planar arrangement according to the first embodiment. FIG. 3 is a conceptual diagram illustrating a detailed configuration of a proximity sensor according to the first embodiment. 3 is a timing chart showing pulse irradiation timing reflected light sampling timing in the proximity sensor of Example 1. It is a block diagram which shows Example 2 of the illuminating device which concerns on embodiment of this invention. (Example 2) It is an expanded view of the white LED mounting flexible substrate in Example 2. It is a block diagram which shows Example 3 of the illuminating device which concerns on embodiment of this invention. (Example 3) It is a block diagram which shows Example 4 of the illuminating device which concerns on embodiment of this invention. Example 4 10 is a flowchart illustrating basic functions of a control unit according to a third embodiment or a fourth embodiment. It is a flowchart which shows the detail of step S38 of FIG. FIG. 12 is a flowchart showing details of step S62 and step S66 in FIG. 11, and is used for the control in the first and second embodiments. It is a flowchart which shows the detail of FIG.10 S26, and is used for control of Example 3 and Example 4. FIG. It is a flowchart which shows the detail of FIG.10 S30, and is used for control of Example 3 and Example 4. FIG.

  FIG. 1 is a block diagram showing Example 1 of the lighting apparatus according to the embodiment of the present invention. The first embodiment is configured as a kitchen hand lighting device 4 that is fixed to an appropriate position above the kitchen by the holding unit 2. Note that the block diagram of FIG. 1 is conceptualized for convenience of understanding. However, if an explanation of the actual configuration is necessary, supplemental will be made as appropriate below. The illuminating device 4 has a plurality of white light emitting diodes (LEDs) 6, 8, 10, 12, 14, 16, 18 and 20 arranged in parallel on the surface, and emits white light emitted from each of them at a relatively wide angle. The light is condensed by each small lens group of the condensing lens array 22 provided on the front surface and irradiated downward. In addition, each white LED is in thermal contact with a heat radiating plate 23 made of metal, and cooling by the heat radiating plate 23 prevents a decrease in light emission efficiency. In FIG. 1, only eight white LEDs are shown for simplicity, but in reality, a large number (for example, several hundreds) of white LED groups are arranged in a circular shape as a whole. Below the lighting device 4, kitchen facilities that require lighting, such as a hot plate 24 such as a gas stove, a cooking table 26, and a sink 28, are located.

  The LED driver 30 receives power from the power supply unit 32, and converts the current from the constant current source 38 through the switch group 36 that is turned on and off by the PWM control unit 34, respectively, to the white LEDs 6, 8, 10, 12, 14, 16, The light emission is controlled by supplying to 18 and 20. The light emission is controlled by the control unit 40 controlling the PWM control unit 34. First, to turn on the lighting device 4, the hand is moved near the lower part of the lower proximity sensor 42. When the control unit 40 determines that there is some change in the output of the lower proximity sensor 42, a lighting signal is sent to the PWM control unit 34, thereby white LEDs 6, 8, 10, 12 regardless of the direction of hand movement. , 14, 16, 18 and 20 are lit. At this time, the lighting state is reproduced when it was previously turned off.

  Next, in order to change the brightness of the illumination device 4, the hand is moved in the left-right direction in the vicinity of the lower portion of the lower proximity sensor 42. When the control unit 40 detects the movement of the hand from left to right according to the output change of the lower proximity sensor 42, a signal for increasing the duty cycle by a predetermined amount is sent to the PWM control unit 34 unless the duty cycle is the upper limit. The brightness of the white LEDs 6, 8, 10, 12, 14, 16, 18 and 20 increases. On the other hand, when the control unit 40 detects the movement of the hand from right to left according to the output change of the lower proximity sensor 42, a signal for decreasing the duty cycle by a predetermined amount is sent to the PWM control unit 34 unless the duty cycle is the lower limit. As a result, the brightness of the white LEDs 6, 8, 10, 12, 14, 16, 18 and 20 decreases. Further, when it is detected that the control unit 40 is rapidly separated from the vicinity of the lower proximity sensor 42 according to the output change of the lower proximity sensor 42, a turn-off signal is sent to the PWM control unit 34, and the white LEDs 6, 8, 10 are detected. , 12, 14, 16, 18 and 20 are turned off.

  Note that, in the above, when a hand that has been increased or decreased is moved away from the lower proximity sensor 42, a desired increase or decrease operation is prevented so that an unintended increase or decrease is not performed accordingly. Then, when the hand is rested for a predetermined time, a dead time zone for invalidating the output change for the predetermined time is provided. Therefore, if the hands are slowly separated in this dead time zone, unintentional light increase or dimming will not occur with this movement. In addition, the lower proximity sensor first detects a change in output so that the movement of the hand approaching the lower proximity sensor 42 before the rapid separation is not confused with the operation for increasing or dimming the light. From the beginning, only turning off based on the determination of rapid separation is performed for a predetermined time. Then, only when it is not determined that there is a rapid separation within the predetermined time, the light is increased or decreased according to the movement of the hand. Accordingly, the extinguishing is executed immediately after detecting the rapid separation of the hand, while the light increase or dimming is executed with a slight delay after the detection of the left / right movement of the hand.

  As described above, the determination by the control unit 40 differs depending on whether the lighting device 4 is turned off or on. That is, when the lighting device 4 is turned off, lighting control is performed regardless of the movement of the hand, and when the lighting device 4 is turned on, a difference in hand movement is discriminated to perform different control such as brightening, dimming, or turning off. .

  In the above description, the white LEDs 6, 8, 10, 12, 14, 16, 18, and 20 may be turned on at a minute duty cycle instead of being turned off, and function as a night light. In this case, “light-off” in the above is to be understood as “night-light on”. It is also possible to set in advance whether to “turn off” or “light up the nightlight” when the illumination is not performed. In addition, the above-mentioned “night-light lighting” ensures that there is no difference in lifetime by lighting all white LEDs 6, 8, 10, 12, 14, 16, 18 and 20 etc. with a minute duty cycle. However, when the difference in life is not emphasized, only the white LEDs (for example, white LEDs 16, 18 and 20 on the sink 28) set in advance for “nightlight lighting” are selectively lit at a minute duty cycle. You may do it.

  Next, when changing the illumination range, the hand is moved in the vicinity of one or both of the left proximity sensor 44 and the right proximity sensor 46. It should be noted that the left proximity sensor 44 and the right proximity sensor 46 are provided on the upper side of the illumination device 4 so as not to disturb the setting of the illumination range due to such operations. In FIG. 1, for simplicity, the proximity sensor for changing the illumination range is a pair of the left proximity sensor 44 and the right proximity sensor 46, but actually a plurality of pairs are arranged around the upper side surface of the illumination device 4. It is provided so that a hand operation from any direction around the vertical axis of the illumination device 4 can be detected. Accordingly, the illumination range can be moved in any direction around the vertical axis of the illumination device 4. Hereinafter, for simplification of changing the illumination range, a specific description will be given based on a pair of the left proximity sensor 44 and the right proximity sensor 46.

  First, the case where the width of the illumination range is changed will be described. In order to reduce the illumination range, both hands slowly approach the left proximity sensor 44 and the right proximity sensor 46, respectively. If the approach of both hands is detected by the control unit 40 based on the output changes of the left proximity sensor 44 and the right proximity sensor 46, a predetermined number of externally around the vertical axis of the illumination device 4 is used unless the illumination range is the lower limit. Turn off the ring-shaped white LED. When the white LEDs 6, 8, 10, 12, 14, 16, 18 and 20 are all lit, an upper limit is set for the duty cycle in consideration of the limit of the heat dissipation capability of the heat sink 23. When a part of the light is turned off as described above, the heat dissipation capability is increased, so that the upper limit of the duty cycle can be increased. Taking advantage of this situation, when the outer ring-shaped white LED is turned off to reduce the illumination range, the duty cycle of the remaining inner white LED group that is lit automatically increases accordingly. Let Thereby, it is possible to realize a spot illumination state in which the illumination range is reduced and the brightness within the range is increased.

  On the other hand, in order to expand the illumination range, both hands are rapidly brought close to the left proximity sensor 44 and the right proximity sensor 46, respectively, and then slowly separated therefrom. At this time, in order to prevent the movement of bringing both hands closer to the illumination range reduction operation described above, a rapid approach of a predetermined speed or higher is not recognized as the illumination range reduction operation. When the control unit 40 detects the separation of both hands based on the output changes of the left proximity sensor 44 and the right proximity sensor 46, the light is off unless the illumination range is the upper limit (that is, all the white LED groups are lit). The white LED group in the lighting device 4 is turned on from a predetermined number of ring-shaped ranges inside the vertical axis of the lighting device 4. At this time, as the number of white LED groups to be lit increases, the duty cycle of the white LED group to be lit is automatically reduced in consideration of the limit of the heat radiation capability of the heat sink 23. At this time, the light emission of each white LED is suppressed, but the total amount of light in the illumination range is maintained.

  Next, a case where the illumination range is moved will be described. As an example, by the above-described illumination range reduction operation, for example, the white LED 10, 12, 14, and 16 are turned on, and the white LED 6, 8, 18, and 20 are turned off, and the cooking table 26 is spot-lit. Think. Here, in order to move the illumination range to the sink 28 on the right side, the left hand approaches the left proximity sensor 44. When this movement is detected by the control unit 40, for example, the white LED 10 is turned off, the white LED 16 is turned on, and the illumination range moves to the sink 28 side. In order to further move the illumination range to the sink 28 side, the left hand is once separated from the left proximity sensor 44 and then approached again. When only the output of the left proximity sensor 44 changes, the control unit 40 ignores the movement of the separation, so that only the re-approach is detected. For example, the white LED 12 is turned off and the white LED 20 is turned on. The illumination range comes on the sink 28. Although the above has been described with the movement on the line, the illumination spot actually moves to the right. In addition, there are many spot movement stages, and the spot becomes smoother.

  On the other hand, when moving the illumination range to the left side, by repeating the approach of the right hand to the right proximity sensor 46, the illumination range is moved to the left side in the same manner as in the case of the left proximity sensor 44 described above. Go. For example, starting from a state where the sink 28 is spot-illuminated by turning on the white LEDs 14, 16, 18 and 20 and turning off the white LEDs 6, 8, 10 and 12, Move your right hand closer. When this movement is detected by the control unit 40, for example, the white LED 20 is turned off, the white LED 12 is turned on, and the illumination range moves to cooking 26th. In order to further move the illumination range to the cooking table 26 side, the right hand is once separated from the right proximity sensor 46 and then brought closer again. When only the output of the right proximity sensor 46 changes in the same manner as in the case of the left proximity sensor 44, the control unit 40 ignores the movement of the separation, so that only the re-approach is detected. The LED 18 is turned off and the white LED 10 is turned on so that the illumination range is on the cooking table 26. By repeating this movement, the illumination range can be moved to the hot plate 24.

  FIG. 2 is a circuit block diagram of the first embodiment shown in FIG. 1. Parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted unless necessary. The power supply unit 32 steps down the alternating current of the power line 48 with the transformer 50 and rectifies it with the full-wave rectifier 52, smooths it with the electrolytic capacitor 54, and supplies it to the direct current power supply circuit 56. The transformer 50 may be omitted and the full-wave rectifier 52 may be directly fed from the power line 48. White LED groups 6, 58, 60, a switch element 62, and a constant current source 64 are connected in series between the DC power supply circuit 56 and the ground. In addition, white LED groups 8, 66, 68, a switch element 70, and a constant current source 72 are connected in series between the DC power supply circuit 56 and the ground. Further, the white LED groups 10, 74, 76, the switch element 78, and the constant current source 80 are connected in series between the DC power supply circuit 56 and the ground in parallel. The on / off state of the switch elements 62, 70, 78, and the like is controlled by the PWM control unit 34, thereby turning on / off the white LED group and adjusting the brightness at the time of lighting. The duty cycle of the PWM control by the PWM control unit 34 is controlled by the control unit 40.

  In FIG. 2, only three white LED groups are connected in series, but in practice, a large number of white LED groups are configured so that the lighting duty can be controlled separately for each series connection. Further, the duty control of the white LED group may be configured not to be in series connection but to be a group in which several series connections are combined in parallel, and to be controlled for each group. Here, zero duty cycle means extinguishing.

  FIG. 3 is a conceptual plan view of the first embodiment in FIGS. 1 and 2, and parts corresponding to those in FIGS. 1 and 2 are denoted by the same reference numerals and description thereof is omitted unless necessary. As is apparent from FIG. 3, the white LEDs are arranged in a circular plane as a whole. Further, the white LEDs 6, 58, 60, etc. connected in series that perform the same control are arranged near each other as a control unit. In correspondence with FIGS. 1 and 2, the white LEDs 8, 66, 68 as the control unit are generally more inside the circle, and the white LEDs 10, 74, 76 as the control unit are further more circular as a whole. Arranged to be inside. Note that the planar arrangement of the white LED group is not limited to a circle as shown in FIG. 3, and other appropriate shapes such as an ellipse and a rectangle are possible.

  In addition, as described above, not only the pair of the left proximity sensor 44 and the right proximity sensor 46 but also the third side proximity sensor 82 and the pair of the fourth side sensor 84 facing the third side proximity sensor 82 are included in the lighting device 4. A plurality of pairs are provided around the vertical axis so that the approach of the hand from any direction can be detected. Accordingly, the illumination range can be moved in any direction around the vertical axis of the illumination device 4. The left proximity sensor 44, the right proximity sensor 46, the third side proximity sensor 82, the fourth side sensor 86, and the like are a first infrared light emitting unit 86, a second infrared light emitting unit 88, and a common infrared light receiving unit, respectively. 90. Details thereof will be described later.

  FIG. 4 shows a detailed configuration of the lower proximity sensor 42, the left proximity sensor 44, the right proximity sensor 46, the third side proximity sensor 82, the fourth side sensor 84, and the like of the first embodiment shown in FIGS. It is a conceptual diagram, the same number is attached | subjected to the part corresponding to FIGS. 1-3, and description is abbreviate | omitted unless it is required. The first infrared light emitting unit 86 irradiates the irradiation range 92 with infrared pulses at a predetermined timing. The second infrared light emitting unit 88 irradiates the irradiation range 94 with an infrared pulse at a timing that does not overlap with the pulse of the first infrared light emitting unit 86. The common infrared light receiving unit 90 converts the infrared reflected light within the light receiving range 96 into the infrared pulse irradiation timing of the first infrared light emitting unit 86, the infrared pulse irradiation timing of the second infrared light emitting unit 88, and the timing when neither infrared pulse exists. And the movement of a finger or the like in the sensing area 98 is detected from these comparisons.

  For example, regarding the movement in the left-right direction in FIG. 4, for example, when a finger or the like moves from position 91 to position 93 in the sensing region 98, the reflected light from the finger is reflected only from the pulse from the second infrared light emitting unit 88. From the state of receiving light, the state of receiving reflected light from the fingers of both pulses is changed to the state of receiving reflected light from the finger of only the pulse of the first infrared light emitting unit 86. Thereby, the movement of the finger from right to left as seen in FIG. 4 is detected. On the other hand, when the finger or the like moves from the position 93 to the position 91 in the sensing area 98, the transition of the light receiving state of the reflected light is reversed, so that the finger moves from left to right as viewed in FIG. Detect.

  On the other hand, regarding the vertical movement in FIG. 4, for example, when the finger or the like moves from the position 95 to the position 97 in the sensing region 98, the reflected light from the finger only from the first infrared light emitting unit 86 is reflected from the finger. A transition is made from the state of receiving the reflected light to the state of receiving the reflected light from the finger for both the pulse of the first infrared light emitting unit 86 and the pulse from the second infrared light emitting unit 88. Thereby, the movement of the finger from the top to the bottom as seen in FIG. 4 is detected. On the other hand, when the finger or the like moves from the position 97 to the position 95 in the sensing area 98, the transition of the light receiving state of the reflected light is reversed, so that the movement of the finger from the bottom to the top as seen in FIG. Detect.

  The above is a simple case in which a relatively small object such as a finger moves within the sensing region 98. However, in the case of a relatively large object such as a palm, the received light output is a combination of reflected light from each part of the palm. . In this case, the movement in the left-right direction in FIG. 4 can be detected relatively easily from the movement of the end of the palm. On the other hand, in the case of the movement in the vertical direction in FIG. 4, the reflected light from the palm is received for both the pulse of the first infrared light emitting unit 86 and the pulse from the second infrared light emitting unit 88 in the entire palm. continue. In such a case, an increase / decrease in the amount of reflected light is detected, and a case where the amount of reflected light increases increases or decreases, and a case where the amount of reflected light decreases decreases. Even if the movement is in the vertical direction, if the palm is moved so as to be parallel to the movement direction, the reflection area becomes small, so that the transition of the reflection state as shown in FIG. 4 can be detected. FIG. 4 shows the case where there are two infrared light emitting units, but in order to increase sensitivity, the number of infrared light emitting units is increased, and in that case, the infrared light emitting units are arranged two-dimensionally or three-dimensionally. It is possible to increase the number of infrared light receiving units 90.

  FIG. 5 shows the first infrared emission in the lower proximity sensor 42, the left proximity sensor 44, the right proximity sensor 46, the third side proximity sensor 82, the fourth side sensor 84, and the like of the first embodiment shown in FIGS. 6 is a timing chart showing the pulse irradiation timing in the unit 86 and the second infrared light emitting unit 88 and the reflected light sampling timing of the common infrared light receiving unit 90. 5A shows the pulse irradiation timing of the first infrared light emitting unit 86, FIG. 5B shows the pulse irradiation timing of the second infrared light emitting unit 88, and FIG. 5C shows the light reception output sampling timing of the common infrared light receiving unit 90. Show. The pulse irradiation in FIGS. 5A and 5B is repeated at, for example, about 100 Hz. As is apparent from FIG. 5, the timing t1 during which only the pulse of the first infrared light emitting unit 86 is irradiated, the timing t2 when there is no pulse irradiation of both, the timing t3 during which only the pulse of the second infrared light emitting unit 88 is irradiated, and both The received light output is similarly sampled in the order of timing t4 when there is no pulse irradiation. As described above, there is no pulse irradiation before and after the reflected light sampling in which only the pulse of the first infrared light emitting unit 86 is irradiated and the reflected light sampling in which only the pulse of the second infrared light emitting unit 88 is irradiated. Thus, the received light output other than the reflected light can be effectively removed.

  FIG. 6 is a block diagram showing Example 2 of the lighting apparatus according to the embodiment of the present invention. The second embodiment is also configured as a kitchen hand lighting device 104 that is fixed to an appropriate position above the kitchen by the holding unit 102. Since most of the configuration is the same as that of the first embodiment, the common parts are numbered in common with the tens and the hundreds, and the description is omitted unless necessary. The detailed configuration shown in FIGS. 2 to 5 can also be adopted in the second embodiment and other embodiments described below. Example 2 of FIG. 6 differs from Example 1 of FIG. 1 in that the white LED 106 to 120 and the like are arranged on the surface curved inward and the condenser lens array 22 provided in Example 1 is provided. It is a point that is omitted. Along with this, the heat radiating plate 123 is also curved inward.

  As a result of the above configuration, the illumination light can be efficiently directed toward the kitchen equipment requiring illumination such as the hot plate 24, the cooking table 26, and the sink 28 below the illumination device 104 even without the condenser lens array 22. Further, since all the white LED groups are concentrated at the central portion 101 of the curved portions of the white LEDs 106 to 120 and the heat radiating plate 123, if there is any food or dish to be seen in a bright state, the central portion 101 Just lift it up. In Example 2, the surface on which the white LEDs 106 to 120, etc. are provided is a part of a spherical surface. As a result, the light emission central axis of the white LED group is concentrated on the central portion 101. The arrangement of the white LED groups so that the light emission central axes are not parallel is not limited to a simple spherical surface, and it is possible to make a fine design in consideration of the illuminance on the illumination target surface.

  When moving the illumination range, to move the illumination range to the sink 28 side, the left hand is brought closer to the left proximity sensor 144. When this movement is detected by the control unit 140, for example, The white LED group on the white LED 120 side is turned off and the white LED group on the white LED 106 side is turned on. Conversely, in order to move the illumination range to the hot plate 24 side, the right hand is moved closer to the right proximity sensor 146. When this movement is detected by the control unit 140, for example, the white LED 106 side The white LED group is turned off and the white LED group on the white LED 120 side is turned on.

  FIG. 7 is a development view of a flexible substrate for mounting the white LED group in the embodiment 2 of FIG. The flexible substrate 151 is mounted with a group of white LEDs 106, 158, 160, a group of white LEDs 108, 166, 168, etc., and has a notch 153, etc., and the heat dissipation plate 123 so that the ends of the notch are in contact with each other. As a whole, the white LED group can be arranged on a surface curved inward as in the cross section of FIG. Control-related circuit elements 155 and 157 such as LED drivers are arranged at the center of the flexible substrate 151 so that the wiring is not divided by the cut 153, and the white LED group is controlled by extending the wiring radially as a whole from here.

  FIG. 8 is a block diagram showing Example 3 of the lighting apparatus according to the embodiment of the present invention. The third embodiment is also configured as a kitchen hand lighting device 204 that is fixed to an appropriate position above the kitchen by the holding unit 202. Further, since most of the configuration is common to the first and second embodiments, the common parts are numbered in the two hundreds in common with the tens place and the first place, and the description is omitted unless necessary. . 8 differs from Example 1 in FIG. 1 or Example 2 in FIG. 6 in that the white LEDs 208, 212, 216 and 220 are equally mixed with the yellow LEDs 207, 209, 211 and 213, etc. It is arranged.

  The white LEDs 208, 212, 216, and 220 are controlled by the white LED driver 230 that is fed by the white power supply unit 232, and the yellow LEDs 207, 209, 211, and 213 are independent of the yellow power supply unit 233. It is controlled by the yellow LED driver 231 fed by Thus, the mixing ratio of white and yellow can be freely changed by changing the duty cycle of the white LED group and the duty cycle of the yellow LED group, and the illumination color can be changed between white and yellow. Such a change in the lighting color in the kitchen is useful, for example, when the color of the food or ingredients is evaluated under the same conditions as the color temperature during the daytime or the color temperature during the nighttime lighting.

  The second point in which the third embodiment of FIG. 8 differs from the first embodiment of FIG. 1 or the second embodiment of FIG. 6 is that the movable reflectors 215 and 217 are provided and driven in conjunction with each other by the drive unit 219. It is the point which comprised so that the irradiation direction of illumination light could be changed. FIG. 8 shows a state where the illumination direction is adjusted to face the hot plate 24 as an example. In Example 3 of FIG. 8, the condensing lens array 22 provided in Example 1 of FIG. 1 is omitted as in Example 2 of FIG. The drive unit 219 is controlled by the control unit 240 and moves the illumination range to the sink 28 side by bringing the left hand closer to the left proximity sensor 244 and moves the right hand closer to the right proximity sensor 246. The movable reflectors 215 and 217 are driven so that the illumination range moves to the hot plate 24 side.

  Further, when the illumination range is changed between the spot and the wide angle by moving both hands closer to and away from the left proximity sensor 244 and the right proximity sensor 246, the movable reflectors 215 and 217 are closed or opened as a whole. Drive control is performed to move in conjunction with. In Example 3 of FIG. 8, unlike Example 1 or Example 2, there is no change in turning on and off of the white LED group and the yellow LED group accompanying the expansion of the illumination range or the movement of the center. Although the movable reflectors 215 and 217 are shown only in a pair on the left and right in FIG. 8 for simplicity, a plurality of pairs of reflectors are arranged around the vertical axis of the lighting device 4 in the same manner as the proximity sensor pair in FIG. The illumination range can be changed in any direction around the vertical axis.

  In the case of Example 3, when the night light is turned on, all the white LED groups are turned off, and the yellow LED groups are turned on at a minute duty cycle. In addition, when changing the brightness of the illumination, or when making the illumination dark as a whole, the duty cycle of the white LED group is narrowed down rather than the duty cycle of the yellow LED group, so that the overall yellow color wins and vice versa. In addition, when the illumination is brightened as a whole, the white LED group is automatically controlled to have a stronger whiteness by increasing the duty cycle of the white LED group than that of the yellow LED group. As a result, the color temperature change associated with the brightness change of the incandescent light bulb and the color temperature change during the daytime and dusk are imitated, so that the natural brightness change is performed sensuously.

  FIG. 9 is a block diagram showing Example 4 of the lighting apparatus according to the embodiment of the present invention. The fourth embodiment is also configured as a kitchen hand lighting device that is fixed to an appropriate position above the kitchen by the holding unit 302. Since most of the configuration is the same as that of the third embodiment shown in FIG. 8, the common parts are numbered in the 300s in common with the tens place and the first place, and the description is omitted unless necessary. 9 differs from the third embodiment in FIG. 8 in that the kitchen lighting device is separated into a control fixing unit 305 and a movable lighting unit 304, and the movable lighting for the control fixing unit 305 is performed by the swing mechanism 341. The angle of the unit 304 is variable so that the irradiation direction can be changed. Note that a condensing lens array 322 is employed in order to increase the directivity of illumination as in the first embodiment. Accordingly, the movable reflectors 215 and 217 of the third embodiment are not employed in the fourth embodiment.

  First, the change in the illumination direction in the fourth embodiment will be described. The drive unit 319 that controls the head disadvantageous climate 341 is controlled by the control unit 340, and the left illumination sensor 344 is moved closer to the left hand to move the movable illumination unit. As a whole, 304 is tilted clockwise in the direction of the plate so as to illuminate around the sink 28 side. Conversely, when the right hand is moved closer to the right proximity sensor 346, the movable illumination unit 304 is tilted clockwise as a whole, and illuminates around the hot plate 24 side.

  When the illumination range is changed between the spot and the wide angle by moving both hands toward and away from the left proximity sensor 244 and the right proximity sensor 246, the LED group (this is the same as in the first and second embodiments). In this case, the illumination range is increased or decreased by turning on and off the white LED group and the yellow LED group). Further, as the number of LED groups that are turned off at this time increases, the duty cycle of the LED groups that are turned on is increased as in the first and second embodiments.

  In the above-described first to fourth embodiments, the respective features are mainly simplified and described. Therefore, the features shown in each embodiment can be used in combination or the combination of features can be changed. Is optional. For example, Example 6 is configured as a swing type as in Example 4, or Example 1 or Example 2 is configured as a mixed type of white LED group and yellow LED group as in Example 3 or Example 4. It is optional. In the second and third embodiments, it is optional to use a condensing lens array as in the first and fourth embodiments. Furthermore, the proximity sensor is not limited to the one shown in FIGS. 4 and 5, and it is optional to employ other types of proximity sensors that can perform the same function.

  FIG. 10 is a flowchart showing the basic functions of the control unit 240 in the third embodiment of FIG. 8 and the control unit 340 in the fourth embodiment of FIG. However, it can also be adopted in the control unit 40 in the first embodiment of FIG. 1 and the control unit 140 in the second embodiment of FIG. The flow starts by installing a lighting device and supplying power, and performs an initial stage process in step S2. This process is basically a function check of the entire lighting device, but it is also possible to make various settings for a predetermined time, whether to turn on the nightlight instead of turning off, Custom settings can be made regarding whether or not to automatically change the color temperature associated with a change in brightness, whether or not to perform an automatic brightness change associated with a change in illumination range, and the like. If nothing is set within a predetermined time, the default setting (all the above settings are “Yes”) is set, and the initial setting process is terminated. Hereinafter, the flow will be described as a default setting.

  When the initial setting process is completed, the process proceeds to step S4 to instruct to turn on the nightlight yellow. In step S6, it is checked whether the lower proximity sensor has a sensor output. If there is a sensor output, the process proceeds to step S8, where it is checked whether the illumination is currently on. If the illumination is not lit, the process proceeds to step S10, the lighting state memory is read, and the process proceeds to step S12. If there is no memory, default lighting is performed and the process proceeds to step S12. In step S12, illumination lighting is instructed based on the lighting state storage in step S10. In this manner, when it is determined in step S8 that the illumination is not lit, the process proceeds to step S12 regardless of the lower proximity sensor output in step S6, and illumination illumination is instructed. The lighting state storage in step S10 is storage of the brightness, color temperature, illumination range, etc. immediately before the previous turn-off, and the illumination state immediately before the previous turn-off is reproduced through step S10.

  When lighting is instructed in step S12, the process proceeds to step S14, and then the proximity sensor is desensitized for a predetermined time. This is to prevent an unintentional malfunction from being detected by the proximity sensor, for example, when the hand close to the proximity sensor is separated for the lighting operation. When the predetermined time of step S14 elapses, the flow moves to step S16, and it is checked whether the power supply is cut off. If the supply is maintained, the process returns to step S6.

  On the other hand, when it is detected in step S8 that the lighting is on, the process proceeds to step S18, and an output storage comparison process is performed to determine the hand movement based on the time change history of the proximity sensor output. Then, the process proceeds to step S20 through the output storage comparison process in step S18, and it is checked whether or not the hand movement detected by the lower proximity sensor is rapid separation. If it is not rapid separation, the process proceeds to step S22, and it is checked whether or not a predetermined time has passed since the lower proximity sensor output was first detected. If the predetermined time has not elapsed, the process returns to step S18, and proceeds to step S20 through an output storage comparison process based on a new sensor output. In this way, unless a rapid separation is detected and a predetermined time has not elapsed, steps S18 to S22 are repeated, and nothing is done for the time being even if there is a lower proximity sensor output. In this way, while repeating step S18 to step S22, it reacts only to the detection of the rapid separation, so that an unexpected erroneous operation is prevented from being caused by the hand approaching the lower proximity sensor for rapid separation. .

  If the predetermined time has elapsed in step S22, the process proceeds to step S24, and it is checked whether or not the movement detected in step S18 is a left-right movement. If it is left-right movement, the process proceeds to step S26, a predetermined light amount change process is performed, and the process proceeds to step S28. The predetermined light amount changing process in step S26 is a process for darkening or increasing the light amount by a predetermined amount depending on the direction if the movement detected in step S24 is a rightward movement or a leftward movement. Details thereof will be described later. If it is not detected in step S24 that the movement is left or right, the process directly proceeds to step S28.

  In step S28, it is checked whether or not the movement detected in step S18 is a vertical movement. If it is a vertical movement, the process proceeds to step S30, a predetermined color changing process is performed, and the process proceeds to step S32. The predetermined color changing process of step S30 is a process of changing the illumination color by a predetermined amount in the yellow direction or the white direction depending on whether the movement detected in step S28 is an upward movement or a downward movement. Details thereof will be described later. If it is not detected in step S28 that the movement is left or right, the process directly proceeds to step S32. As described above, the execution of the operations based on the horizontal movement and the vertical movement is delayed until it is confirmed that the movement of the hand is not rapidly separated by repeating Step S18 to Step S22.

  In step S32, it is checked whether an output change has occurred within a predetermined time due to the output of the lower proximity sensor. If the hand that caused the output change of the lower proximity sensor continues to move, the output change occurs within a predetermined time. However, if the hand is stopped thereafter, the output change does not occur within the predetermined time. If it is detected that there is no output change within a predetermined time, the process proceeds to step S34, and then the proximity sensor is desensitized for a predetermined time. This is because the proximity sensor senses this when the hand that performed the light quantity change or color change operation moves away from the proximity sensor after realizing the desired light quantity or color, and further causes an unintended light quantity or color change. This is to prevent such malfunction. When the predetermined time in step S34 has elapsed, the flow proceeds to step S16. On the other hand, when there is an output change within the predetermined time in step S32, it is considered that the operation of changing the brightness or the color is continued, and the process directly proceeds to step S16.

  On the other hand, when the output change of the lower proximity sensor is not detected in step S6, the process proceeds to step S36, and it is checked whether there is a sensor output change in one or both of the left proximity sensor and the right proximity sensor. When a change in the sensor output is detected, the process proceeds to step S38, an illumination range changing process is performed, and the process proceeds to step S16. Details of the illumination range changing process will be described later. On the other hand, if no change in output of either the left proximity sensor or the right proximity sensor is detected in step S36, the process proceeds directly to step S16.

  On the other hand, when the rapid separation is detected in step S20, the process proceeds to step S40, where the current lighting state is stored, and in step S42, the nightlight yellow lighting is instructed, and the process proceeds to step S16. As described above, Step S6 to Step S42 are repeated, corresponding to each operation of yellowing or maintaining the lighting of the nightlight or changing the lighting, or changing the brightness, color, and lighting range.

  FIG. 11 is a flowchart showing details of the illumination range changing process in step S38 of FIG. If the flow is a star, it is checked in step S52 whether the illumination is on. If the lighting is not on, the flow is immediately terminated. Thus, when the illumination is not on, the outputs of the left proximity sensor and the right proximity sensor are invalid and nothing is performed. This is because the change in the illumination range is meaningless unless the kitchen facility or the like that is actually illuminated by lighting is viewed.

  If it is detected in step S52 that the lighting is on, the process proceeds to step S54, the output storage comparison process similar to step S18 in FIG. 10 is performed, and the process proceeds to step S56. In step S56, it is checked whether there are sensor outputs in both the left proximity sensor and the right proximity sensor. If both sensor outputs are present, the process proceeds to step S58 to check whether or not the approach is detected. If it is an approach detection, the process proceeds to step S60, and it is checked whether or not it is a rapid approach. If it is not rapid approach, the predetermined illumination range reduction process of step S62 is executed, and the process proceeds to step S64. On the other hand, when a rapid approach is detected in step S60, the process directly proceeds to step S64. Further, when no approach is detected in step S58, the process directly proceeds to step S64. In this way, the illumination range reduction operation in step S62 is executed only when both hands are slowly brought close to the left proximity sensor and the right proximity sensor.

  In step S64, it is checked whether or not separation detection has been performed based on the sensor outputs of both the left proximity sensor and the right proximity sensor. And if it is separation detection, the predetermined illumination range expansion process of step S66 will be performed and it will transfer to step S68. On the other hand, if no separation is detected in step S64, the process directly proceeds to step S68. In this way, the illumination range expansion operation in step S66 is executed regardless of the speed with which both hands are separated from the left proximity sensor and the right proximity sensor. Note that if it is not detected in step S56 that there is a sensor output in both the left proximity sensor and the right proximity sensor, the process proceeds directly to step S68.

  In step S68, it is checked whether or not an approach is detected based on the sensor output of the left proximity sensor. If there is an approach detection, the predetermined illumination range right change process in step S70 is executed, and the process proceeds to step S72. On the other hand, if there is no approach detection by the sensor output of the left proximity sensor in step S68, the process directly proceeds to step S72.

  In step S72, it is checked whether or not an approach has been detected based on the sensor output of the right proximity sensor. If there is an approach detection, the predetermined illumination range left change process in step S74 is executed, and the process proceeds to step S76. On the other hand, when there is no approach detection by the sensor output of the right proximity sensor in step S72, the process directly proceeds to step S76. As described above, when there is only the sensor output of either the left proximity sensor or the right proximity sensor, the proximity detection is always performed, and nothing is executed even if the separation is detected. This is because the left proximity sensor and the right proximity sensor are in charge of one of the left and right movements, respectively, so there is no need for bidirectional detection. Further, by adopting such a detection method, there is no risk of malfunction due to separation. Such a detection method is, for example, a non-contact imitation of a swing-type lighting device that is pushed to the right or left with both hands and touched without touching the lighting device. The operation by the same operation interval is enabled.

  In step S76, it is checked whether an output change has occurred within a predetermined time in either the left proximity sensor or the right proximity sensor. This is a step having the same meaning as step S32 in FIG. That is, if both hands that caused the output change of both the left proximity sensor and the right proximity sensor continue to move, the output change within a predetermined time will occur, but if both hands are then stopped, the output change will not occur . When it is detected that the hand remains stationary and there is no change in output within a predetermined time, the process proceeds to step S78, and then the proximity sensor is desensitized for a predetermined time. As a result, when a hand that has changed the illumination range realizes the desired illumination range change and then moves away from the proximity sensor, a malfunction that causes the proximity sensor to sense this and unintentionally expand the illumination range does not occur. To. When the predetermined time in step S78 has elapsed, the flow ends. On the other hand, if there is an output change within a predetermined time in step S76, it is considered that the operation for changing the illumination range is continuing, and the flow is immediately terminated.

  As described above, the flowcharts of FIGS. 10 and 11 can be applied to the first and second embodiments with a slight modification. First, when the color change function is not employed as in the first and second embodiments, “everyday yellow light” in step S4 and step S42 in FIG. 10 is read as “all night light on”. Steps S28 and S30 are omitted. On the other hand, although not replaced, “illumination range changing process” in step S38 of FIG. 10 and reduction / enlargement or left / right change of the illumination range in steps S62, S66, S70, and S74 of FIG. The present invention is not limited to the mechanical drive unit in FIG. 4, but can be applied to a change in the lighting target LED group and a change in brightness as in the first and second embodiments.

  The implementation of the various features of the present invention illustrated in the above embodiments is not limited to the embodiments. For example, a pair of sensor units responsible for detecting hand movements in opposite directions, such as a left proximity sensor and a right proximity sensor, are provided, and a light source unit based on the movements of the right hand and the left hand respectively handled by the pair of sensor units In step S68 and step 72 in the flowchart of FIG. 11, only the approach of the hand is detected, and the separation is insensitive between the movement of the hand and the resulting illumination range change. It prevents the operational mess from being confused. However, the implementation in the case where the pair of sensor units are responsible for detecting hand movements in opposite directions is not limited thereto. As an example, some hand movements are detected by the left proximity sensor and the right proximity sensor in steps S68 and 72, respectively, and step S70 is executed for left hand movements regardless of the detailed mode of hand movement. If it is a right hand movement, step S74 may be executed. According to this configuration, for example, the right change of the illumination range is caused by the reciprocation of the left hand, and the left change of the illumination range is caused by the reciprocation of the right hand. Even in this case, by learning the operation and the result, it is possible for the operator to change the illumination range to the right or to the left with the sensation of repeating the approaching movement of the left or right hand.

  FIG. 12 is a flowchart showing details of the predetermined illumination range reduction process in step S62 of FIG. 11 and the predetermined illumination range expansion process in step S66 of FIG. The flowchart of FIG. 12 is used in an embodiment of a type in which the illumination range is changed by increasing or decreasing the number of LED groups to be lit as in Embodiment 1 of FIG. 1 or Embodiment 2 of FIG. And step S66 can be employed. If the flow is a star, the process proceeds to step S82, and it is checked whether or not it is a rapid approach. If it is rapid approach, it will progress to step S84 and it will be checked whether only the LED group corresponding to the present minimum illumination range is in the lighting state. If it does not correspond, it progresses to step S84, instruct | indicates light extinction to the LED group corresponding to the annular zone adjacent to a lighting continuation object, and reduces an illumination range.

  Next, in step S88, it is checked whether or not the mode is a mode for automatically increasing the brightness of the LED group that is continuously lit when the illumination range is narrowed. When it is confirmed in step S88 that such a narrow range automatic elephant mode is set, the process proceeds to step S90, and data on the duty cycle allowed after the illumination range is reduced is read from the storage unit in the control unit. In step S92, an instruction is given to increase the duty cycle of the LED group to be lit continuously within the allowable range read in step S90, and the process proceeds to step S94. On the other hand, when it is not confirmed in step S82 that rapid approach is detected, or only the LED group corresponding to the minimum illumination range is lit in step S84 and the illumination range cannot be further reduced, or in step S88, the automatic narrow range is detected. When it is not confirmed that the light-intensifying mode is set, the process directly proceeds to step S94.

  In step S94, it is checked whether the detected one is separation. If it is separation detection, the process proceeds to step S96, and it is checked whether only all LED groups are currently lit. If not, the process proceeds to step S98, and data on the duty cycle allowed after the illumination range is expanded is read from the storage unit in the control unit. In step S100, it is checked whether the duty cycle of the LED group that is lit is outside the allowable range read in step S98. And if it corresponds, it will progress to step S102, will perform the instruction | indication which reduces the duty cycle of the LED group in lighting in tolerance level, and will transfer to step S104. If it is confirmed in step S100 that the duty cycle of the already-lit LEDs is not outside the allowable range even if the number of lit LEDs is increased, the process directly proceeds to step S104.

  In step S104, an instruction is given to turn on the LED group corresponding to the annular zone adjacent to the lighting continuation target within the allowable duty cycle, the illumination range is expanded, and the flow is ended. On the other hand, if it is not confirmed in step S94 that the separation is detected, or if all the LED groups are lit and the illumination range cannot be expanded any more in step S96, the flow is immediately terminated.

  FIG. 13 is a flowchart showing details of the predetermined light amount changing process in step S26 of FIG. The flowchart of FIG. 13 is used in an embodiment of a type in which white LEDs and yellow LEDs can be mixed to adjust the color of the illumination color as in Embodiment 3 of FIG. 8 and Embodiment 4 of FIG. This is to automatically reduce the color temperature and reduce the yellow color to a lighting job. When the flow starts, it is checked in step S112 whether it is a leftward movement that is detected. If the leftward movement is detected, the process proceeds to step S114, and the data of the allowable duty cycle in the current lighting state is read from the storage unit in the control unit. Then, in the next step S116, it is checked whether or not lighting is performed with an allowable duty cycle. If it is within the allowable duty cycle, there is room for further increasing the duty cycle to brighten the light amount, and the process proceeds to step S118.

  In step S118, it is checked whether or not only the yellow LED group is lit and the duty cycle of the white LED group is in a region where the light amount is low and the white LED group is zero. If it is not such a region, the process proceeds to step S120, and it is checked whether or not the duty cycle of the white LED group is below the lower limit of the predetermined range. If it does not correspond to such a range, the process proceeds to step S122 to check whether the duty cycle of the white LED group is within a predetermined range. When this range is satisfied, an instruction is given to increase the amount of illumination light by a predetermined amount by increasing the duty cycle of each of the white LED group and the yellow LED group in step S124, and the process proceeds to step S126. At that time, the duty cycle increase rate of the white LED group is made larger than that of the yellow LED group so that the overall brightness is increased and the color is also shifted to the white side to increase the color temperature.

  On the other hand, if it cannot be confirmed that the leftward movement is detected in step S112, the process proceeds directly to step S126. In step S116, if it is confirmed that the current duty cycle has already reached the allowable limit and there is no room for further increasing the duty cycle to brighten the light amount, the process proceeds directly to step S116. Furthermore, when it is confirmed in step S118 that the duty cycle of the white LED group is in the zero region, the process proceeds to step S126, the duty cycle of the yellow LED group is increased by a predetermined amount, and the process proceeds to step S126. That is, in this region, the white LED group is not yet turned on, and the brightness of the yellow LED group is increased.

  If it is confirmed in step S120 that the white LED group is in the region where the white LED group is lit but the duty cycle is below the lower limit of the predetermined range, the process proceeds to step S128, and the duty cycle of the yellow LED group is changed to the white LED group lighting region. The duty cycle of only the white LED group is increased by a predetermined amount while being fixed to a small duty cycle at the time of arrival. This increases the overall brightness and shifts the color to the white side to increase the color temperature. Furthermore, if it is not confirmed in step S122 that the duty cycle of the white LED group is within the predetermined range, it means that the duty cycle is equal to or greater than the upper limit of the predetermined range, so the process proceeds to step S130, and the white LED group and the yellow LED group Both duty cycles are increased by a predetermined amount at the same increase rate, and the process proceeds to step S126. In the area where step S130 is executed, the color temperature is already the upper limit, and only the brightness is increased at the same color temperature. Note that this step S130 is configured to prioritize increasing the brightness to the limit of the allowable duty cycle. However, when priority is given to further increasing the color temperature in accordance with the increase in brightness, the duty cycle of the yellow LED group is fixed to a relatively large duty cycle when the upper limit of the white LED group lighting predetermined range is reached in step S130. Alternatively, only the duty cycle of the white LED group may be increased by a predetermined amount.

  In step S126, it is checked whether it is a rightward movement detected in step S24 of FIG. If it is rightward movement detection, the process proceeds to step S132, where it is checked whether the current lighting state is performed in the nightlight lighting duty cycle with the minimum brightness. If not, the duty cycle is further reduced to reduce the light amount. Since there is room for reduction, the process proceeds to step S134.

  In step S134, it is checked whether only the yellow LED group is lit and the duty cycle of the white LED group is in a region where the light amount is low and the white LED group is zero. If it is not such a region, the process proceeds to step S136, and it is checked whether the duty cycle of the white LED group is equal to or lower than the lower limit of the predetermined range. If it does not fall within such a range, the process proceeds to step S138 to check whether the duty cycle of the white LED group is within a predetermined range. When this range is satisfied, in step S140, an instruction is given to decrease the duty cycle of the white LED group and the yellow LED group to decrease the amount of illumination light by a predetermined amount, and the flow ends. At that time, the duty cycle reduction rate of the white LED group is made larger than that of the yellow LED group, and the overall brightness is reduced and the color is also shifted to the yellow side so that the color temperature is lowered.

  On the other hand, if it is not possible to confirm that the rightward movement is detected in step S126, the flow is immediately terminated. Further, in step S132, when it is confirmed that the current duty cycle is already in the nightlight lighting state and there is no room to darken the light quantity by further reducing the duty cycle, the flow is immediately terminated. Further, in step S134, when it is confirmed that the duty cycle of the white LED group is in the zero region, the process proceeds to step S142, the duty cycle of the yellow LED group is decreased by a predetermined amount, and the flow is ended. That is, in this region, the white LED group is not already lit, and the brightness of the yellow LED group is reduced.

  If it is confirmed in step S136 that the white LED group is in the area where the white LED group is lit but the duty cycle is below the lower limit of the predetermined range, the process proceeds to step S144, and the duty cycle of the yellow LED group is set to the lower limit of the white LED lighting area. The duty cycle of only the white LED group is reduced by a predetermined amount. As a result, the overall brightness is lowered and the color is also shifted to the yellow side to lower the color temperature. Furthermore, if it is not confirmed in step S138 that the duty cycle of the white LED group is within the predetermined range, it means that the duty cycle is equal to or greater than the upper limit of the predetermined range. Both duty cycles are reduced at the same rate of increase. The color temperature in this region is already the upper limit, and only the brightness is reduced at the same color temperature. Note that the configuration of step S130 is a configuration in which priority is given to increasing the brightness to the allowable duty cycle limit as in step S130. However, in the same manner as described in step S130, when priority is given to further lowering the color temperature in accordance with the decrease in brightness, in step S146, the duty cycle of the yellow LED group is set to the predetermined range of white LED lighting. The duty cycle of only the white LED group may be reduced by a predetermined amount by fixing to a relatively large duty cycle when the upper limit is reached. The relationship between the brightness and the color temperature used for the control as described above is stored as a table in the storage unit of the control unit 40.

  FIG. 14 is a flowchart showing details of the predetermined color changing process in step S30 of FIG. The flowchart of FIG. 14 is also used in an embodiment of a type in which white LEDs and yellow LEDs can be mixed to adjust the color of the illumination color, as in Embodiment 3 of FIG. 8 and Embodiment 4 of FIG. If the flow is a star, step S152 reads the data of the allowable duty cycle in the current lighting state from the storage unit in the control unit. Next, the process proceeds to step S154, and it is checked whether or not an upward movement is detected in step S28 of FIG. If it is an upward movement detection, the process advances to step S156 to check whether a preset mode of a predetermined color is set. This mode setting can be performed in advance in step S2 of FIG.

  If it is not the preset mode, the process proceeds to step S158 to check whether the white LED group is lit at the upper limit of the allowable duty cycle, and if it is not the upper limit of the allowable duty cycle, the duty cycle of the white LED group is further increased to increase the color temperature. Since there is room to increase, the process proceeds to step S160. In step S160, it is checked whether the yellow LED group is lit at an allowable duty cycle lower limit, and if it is not the allowable duty cycle lower limit, there is still room for increasing the color temperature by further reducing the duty cycle of the yellow LED group. Since there exists, it progresses to step S162. In step S162, the duty cycle of the white LED group is increased by a predetermined amount and the duty cycle of the yellow LED group is increased / decreased by a predetermined amount to increase the color temperature and shift to step 164.

  On the other hand, when the upward movement cannot be confirmed in step S154, the process directly proceeds to step S164. When the preset mode setting is detected in step S156, the color temperature is shifted by one step to the white preset color by changing the duty cycle of the white LED group and the yellow LED group to preset values. If only two preset colors are set, the preset color on the white side is set.

  In step S158, when it is detected that the white LED group is lit at the allowable duty cycle upper limit, the process proceeds to step S168, and whether the yellow LED group is lit at the allowable duty cycle lower limit. To check. If not, the process proceeds to step S170, the color temperature is increased by decreasing the duty cycle of the yellow LED group by a predetermined amount while maintaining the duty cycle of the white LED group at the upper limit, and the process proceeds to step S164. On the other hand, if it is detected in step S168 that the yellow LED group is lit at the allowable duty cycle lower limit, the color temperature has already reached the maximum adjustable value and there is no room for further increase. The process directly proceeds to step S164.

  If it is detected in step S160 that the yellow LED group is lit with the allowable duty cycle lower limit, the process proceeds to step S172, and the white LED group is maintained while maintaining the duty cycle of the yellow LED group at the lower limit. Is increased by a predetermined amount to increase the color temperature and the process proceeds to step S164.

  In step S164, it is checked whether or not a downward movement is detected in step S28 of FIG. If the downward movement is detected, the process proceeds to step S174 to check whether a preset mode of a predetermined color is set. If it is not the preset mode, the process proceeds to step S176, where it is checked whether the yellow LED group is lit at the upper limit of the allowable duty cycle, and if it is not the upper limit of the allowable duty cycle, the duty cycle of the yellow LED group is further increased to increase the color temperature. Since there is room for increasing, the process proceeds to step S178. In step S178, it is checked whether the white LED group is lit at an allowable duty cycle lower limit, and if it is not the allowable duty cycle lower limit, there is room for lowering the color temperature by further reducing the duty cycle of the white LED group. Since there exists, it progresses to step S180. In step S180, the duty cycle of the yellow LED group is increased by a predetermined amount, and the duty cycle of the white LED group is increased or decreased by a predetermined amount, thereby lowering the color temperature and terminating the flow.

  On the other hand, when the downward movement cannot be confirmed in step S164, the process directly proceeds to step S164. When the preset mode setting is detected in step S174, the color temperature is shifted by one step to the preset color on the yellow side by changing the duty cycle of the white LED group and the yellow LED group to preset values. Note that if only two preset colors are set, the preset color on the yellow side is set.

  If it is detected in step S176 that the yellow LED group is lit at the allowable duty cycle upper limit, the process proceeds to step S184, and whether the white LED group is lit at the allowable duty cycle lower limit. To check. If not, the process proceeds to step S186, and while maintaining the duty cycle of the yellow LED group at the upper limit, the color temperature is lowered by decreasing the duty cycle of the white LED group by a predetermined amount, and the flow is terminated. On the other hand, if it is detected in step S184 that the white LED group is lit with the allowable lower limit of the duty cycle, the color temperature is already the lowest adjustable value and there is no room for further reduction. Therefore, the flow ends immediately.

  If it is detected in step S178 that the white LED group is lit at the allowable duty cycle lower limit, the process proceeds to step S188, and the yellow LED group is maintained while maintaining the duty cycle of the white LED group at the lower limit. The color cycle is lowered by increasing the duty cycle by a predetermined amount to end the flow.

  The utilization of the various advantages of the present invention is not limited to the above-described embodiments, but can be enjoyed in various other implementations. For example, in the embodiment of FIGS. 6 and 7, in order to arrange the light emitting diode groups three-dimensionally rather than in a plane, a curved surface that forms a part of a sphere is used. However, as described above, the LED group is not limited to be arranged on a simple spherical surface so that the light emission central axes are not parallel to each other, and it can be designed in detail in consideration of the illuminance on the illumination target surface. It is. In addition, as a base of the arrangement, not only the surface curved inward but also the surface curved outward can be used. Furthermore, it is also possible to make a three-dimensional arrangement that is not continuously on the surface but shifted stepwise.

The present invention can be applied to lighting devices in various living environments such as kitchens and toilets.

6, 106, 207, 208, 307, 308 Light source unit 32, 132, 232, 233, 332, 333 Power source unit 40, 140, 240, 340 Control unit

Claims (25)

  A light source unit including a plurality of light emitting diodes, a power source unit for supplying power to the light source unit, and a substantial lighting when controlling the number of the plurality of light emitting diodes that are substantially lit and limiting the number of light emitting diodes that are substantially lit And a controller that increases the allowable power that can be supplied to each light emitting diode in the state.   The lighting device according to claim 1, wherein the light source unit includes a heat dissipation unit of a light emitting diode, and the allowable power is determined according to a heat dissipation capability of the heat dissipation unit.   The lighting device according to claim 1, wherein the light source unit changes the width of the illumination range by changing the number of light-emitting diodes in a substantially lit state.   The lighting device according to claim 3, wherein the light emitting unit narrows an illumination range by limiting the number of light emitting diodes in a substantially light emitting state.   The lighting device according to claim 1, wherein the light emitting unit shifts an illumination range by changing a light emitting diode that is substantially in a lighting state.   6. The light emitting unit includes a plurality of types of light emitting diodes having different color temperatures, and is configured to change an illumination color temperature as a whole by selecting light emitting diodes that are substantially in a lighted state. The illuminating device in any one of.   The lighting device according to claim 1, wherein the control unit adjusts supply power by changing a duty cycle of a current supplied to the light emitting diode.   A light source unit including a plurality of light emitting diodes; a power source unit that supplies power to the light source unit; and a control unit that changes a width of an illumination range by controlling a substantial number of lighting of the plurality of light emitting diodes. A lighting device characterized by the above.   9. The control unit according to claim 8, wherein when the illumination range is narrowed by limiting the number of light emitting diodes that are substantially lighted, the power supplied to each light emitting diode that is substantially lighted is increased. Lighting device.   The lighting device according to claim 8, wherein the light emitting unit shifts an illumination range by changing a light emitting diode in a substantially lit state.   The lighting device according to claim 8, wherein the light emitting unit determines an illumination range of each light emitting diode by arranging a plurality of light emitting diodes three-dimensionally.   The lighting device according to claim 11, wherein the light emitting unit is provided with a plurality of light emitting diodes on a planar flexible substrate, and the plurality of light emitting diodes are three-dimensionally arranged by bending the light emitting diodes.   A light source unit including a plurality of light emitting diodes, a power source unit for supplying power to the light source unit, and controlling a substantial lighting state of the plurality of light emitting diodes to shift an illumination range by changing the light emitting diodes in a substantially lighting state. And a controller for controlling the lighting device.   The light emitting unit includes a plurality of types of light emitting diodes having different color temperatures, and is configured to change the illumination color temperature as a whole by selecting light emitting diodes that are substantially in a lighted state. The illuminating device in any one of.   The lighting device according to claim 8, wherein the control unit adjusts supply power by changing a duty cycle of a current supplied to the light emitting diode.   A light source unit including a light emitting diode, a power source unit that supplies power to the light source unit, and changes the brightness of the light source unit and automatically changes the color temperature of the light source unit in conjunction with the change in brightness. And a controller for controlling the lighting device.   The lighting device according to claim 16, wherein the light emitting unit includes a plurality of types of light emitting diodes having different color temperatures, and the control unit changes the illumination color temperature as a whole by selecting the light emitting diodes.   The lighting device according to claim 16 or 17, wherein the control unit lowers the color temperature of the light source unit as the brightness of the light emitting unit decreases.   The lighting device according to any one of claims 16 to 18, wherein the control unit turns on the light emitting unit with a night light with a minimum brightness and a minimum color temperature.   The lighting device according to claim 16, further comprising a storage unit that stores a color temperature controlled by the control unit.   A light source unit including a light emitting diode; a power source unit that supplies power to the light source unit; a control unit that changes a color temperature of the light source unit; and a storage unit that stores a color temperature controlled by the control unit. A lighting device characterized by the above.   A light source unit including a plurality of types of light emitting diodes having different color temperatures, a power source unit that supplies power to the light source unit, and the illumination color temperature as a whole is changed by the selection of the light emitting diodes, and the relationship between brightness and color temperature And a controller that performs different control on the plurality of types of light emitting diodes.   The lighting device according to claim 22, wherein the control unit changes the illumination color temperature as a whole by changing power supply to the light emitting diode having a high color temperature among the plurality of types of light emitting diodes.   The illumination according to claim 22 or 23, wherein the controller changes the illumination color temperature as a whole by changing the power supply to the light emitting diode having a low color temperature among the plurality of types of light emitting diodes. apparatus.   The lighting device according to any one of claims 22 to 24, wherein the control unit changes the illumination color temperature as a whole by changing power supply to the plurality of types of light emitting diodes.