JP6078880B2 - Lighting device - Google Patents

Description

  The present invention relates to an illumination device that emits light.

  The following Patent Document 1 is known as a technique for adjusting the brightness even in the presence of external light. This Patent Document 1 describes an illumination device that prevents excessive adjustment of brightness without excessively reducing the illuminance of a dark part by detecting the illuminance of a dark part of a room that is not easily exposed to external light. .

JP 2012-22849 A

  However, since the illumination device of Patent Document 1 controls all the light sources, there is a problem that an already bright area is excessively brightened by external light.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and an object thereof is to provide an illuminating device that can be adjusted to have an appropriate brightness even in the presence of external light.

The illumination device according to the first aspect of the present invention includes a plurality of light sources capable of adjusting an illumination physical quantity including at least luminance, a detection unit that detects illuminance in a predetermined range in which light can be emitted by the plurality of light sources, A storage unit that stores the correspondence between the distribution of the physical quantity of illumination detected by the detection unit and the light source to be controlled, and determines whether or not the illuminance within the detection range detected by the detection unit is greater than or equal to a predetermined value And determining a light source to be controlled based on the distribution of the illumination physical quantity detected by the detection means with reference to a correspondence relationship between the illumination physical quantity distribution stored in the storage unit and the light source. When the illuminance is determined not to be greater than or equal to the predetermined value by the determination means, the luminance of the light source to be controlled is increased so as to increase the illuminance in the predetermined range and approach the predetermined value, And a controller that lowers the luminance of the light source to be controlled so as to reduce the illuminance in the predetermined range and approach the predetermined value when the illuminance is determined to be greater than or equal to the predetermined value by the cutting means. It is characterized by.

  The illumination device according to a second aspect of the present invention is the illumination device according to the first aspect, wherein the plurality of light sources are capable of adjusting a color temperature of light to be emitted, and the detection unit is configured to perform the predetermined range. The control unit controls the color temperature of the light emitted by each of the light sources so that the color temperature in the predetermined range approaches the color temperature of the predetermined range in which external light is incident. It is characterized by that.

  An illumination device according to a third aspect of the present invention is the illumination device according to the first or second aspect, wherein the plurality of light sources are LEDs arranged in a predetermined direction in a housing, and the control unit Is characterized in that an LED for adjusting luminance or color temperature is selected from a plurality of LEDs, and a range in which the illuminance or color temperature is adjusted in the predetermined range is controlled.

  An illumination device according to a fourth aspect of the present invention is the illumination device according to the first or second aspect, wherein the storage unit irradiates light from a preset light source among the plurality of light sources. A light emission pattern forming a predetermined light shape is stored, and the control unit controls luminance or color temperature of a plurality of light sources according to the light emission pattern stored in the storage unit.

  An illumination device according to a fifth aspect of the present invention is the illumination device according to any one of the first to fourth aspects, further including a human sensor, and only when the human sensor detects a person. The light source is controlled.

  An illumination device according to a sixth aspect of the present invention is the illumination device according to any one of the first to fifth aspects, further including a human sensor, wherein the human sensor detects the person as a center. The predetermined range detected by the detecting means is changed.

  According to the present invention, it is possible to adjust the brightness to be appropriate even when external light is present.

It is a block diagram which shows the functional structure of the illuminating device shown as embodiment of this invention. It is a flowchart which shows operation | movement of the illuminating device shown as embodiment of this invention. It is a figure which shows the magnitude relationship of the irradiation state of the light source before the control of the illumination intensity by the illuminating device shown as embodiment of this invention, the illumination intensity distribution of a floor surface, and illumination intensity. It is a figure which shows the magnitude relationship of the irradiation state of the light source after the control of the illumination intensity by the illuminating device shown as embodiment of this invention, the illumination distribution of a floor surface, and illumination intensity. It is a top view which shows an example of the light emission pattern in an illuminating device. It is a figure which shows the magnitude relationship of the irradiation state of the light source before the control of color temperature by the illuminating device shown as embodiment of this invention, the illumination intensity distribution of a floor surface, and color temperature. It is a figure which shows the magnitude relationship of the irradiation state of the light source after the control of color temperature by the illuminating device shown as embodiment of this invention, the illuminance distribution of a floor surface, and color temperature. In the illuminating device shown as embodiment of this invention, it is a figure which shows the irradiation state of a light source, the state of a floor surface, and the state of control when there is no person. In the illuminating device shown as embodiment of this invention, it is a figure which shows the irradiation state of the light source in case there exists a person, the illumination intensity distribution of a floor surface, and the state of illumination intensity.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The illuminating device shown as embodiment of this invention has each functional part as shown, for example in FIG. This illuminating device is composed of, for example, a ceiling light provided on the ceiling of the room.

  The illumination device includes a plurality of light sources 1A,..., 1N (hereinafter simply referred to as “light source 1” when collectively referred to), a control unit 2, a determination unit 3, an illuminance sensor unit 4, and a storage unit 7. Have The lighting device may have a color temperature sensor unit 5. Furthermore, the lighting device may have a human sensor unit 6.

  The light source 1 can adjust an illumination physical quantity including at least luminance. The plurality of light sources 1 are constituted by, for example, LED light emitting elements arranged in a predetermined arrangement pattern. As this arrangement pattern, for example, a plurality of annular patterns can be considered.

  The illuminance sensor unit 4 functions as a detection unit that detects illuminance within a predetermined range in which light can be emitted by the plurality of light sources 1. The illuminance sensor unit 4 is capable of detecting illuminance, for example, with a floor surface of a room provided with a ceiling light as a predetermined range. In addition, the illumination intensity sensor part 4 is good also considering not only the floor surface of a room but a wall surface as a detection target. Furthermore, the illuminance sensor unit 4 may detect a part of the floor surface or wall surface of the room as a detection target. The illuminance detected by the illuminance sensor unit 4 is supplied to the determination unit 3.

  The plurality of light sources 1 may be capable of adjusting the color temperature of the irradiated light. In this case, the lighting device detects the color temperature in a predetermined range by the color temperature sensor unit 5. The color temperature detected by the color temperature sensor unit 5 is supplied to the determination unit 3.

  The storage unit 7 is a storage unit that stores a correspondence relationship between the distribution of the physical quantity of illumination detected by the illuminance sensor unit 4 and the light source 1 to be controlled. The illumination physical quantity includes illuminance and color temperature, but may be any other controllable value. This correspondence is designed so that the room in which the illumination device is provided has uniform brightness as described later. The correspondence stored in the storage unit 7 is read by the control unit 2.

  When the lighting device includes the color temperature sensor unit 5, the storage unit 7 stores a correspondence relationship between the distribution of the physical physical quantity (color temperature) detected by the color temperature sensor unit 5 and the light source 1 to be controlled. . This correspondence is designed so that the room in which the lighting device is provided has a uniform color temperature, as will be described later. The correspondence stored in the storage unit 7 is read by the control unit 2.

  The determination unit 3 functions as a determination unit that determines whether or not the illuminance within the detection range detected by the illuminance sensor unit 4 is greater than or equal to a predetermined value. This predetermined value is set in advance when the lighting device is designed. The determination result by the determination unit 3 is output to the control unit 2.

  When the lighting device includes the color temperature sensor unit 5, the determination unit 3 may determine whether the color temperature within the detection range detected by the color temperature sensor unit 5 is equal to or higher than a predetermined value. This predetermined value is set in advance when the lighting device is designed. The determination result by the determination unit 3 is output to the control unit 2.

  The control unit 2 controls operations of the plurality of light sources 1. The control unit 2 determines the light source 1 to be controlled based on the distribution of the illumination physical quantity (illuminance and / or color temperature) detected by the illuminance sensor unit 4. At this time, the control unit 2 refers to the correspondence relationship between the illumination physical quantity distribution stored in the storage unit 7 and the light source 1. Thereby, the control unit 2 determines the light source 1 to be controlled.

  Moreover, the control part 2 controls the light source 1 to be controlled so as to increase the illuminance within a predetermined range when the illuminance is determined not to be a predetermined value or more by the determination part 3. Thereby, the control part 2 makes the brightness | luminance of the light source 1 made into a control object high so that illumination intensity may approach a predetermined value. On the other hand, when the determination unit 3 determines that the illuminance is greater than or equal to a predetermined value, the control unit 2 controls the light source 1 to be controlled so as to reduce the illuminance within a predetermined range. Thereby, the control part 2 makes the brightness | luminance of the light source 1 made into a control object low so that illumination intensity may approach a predetermined value.

  Further, when the color temperatures of the plurality of light sources 1 can be adjusted, the control unit 2 adjusts the color temperature of each light source 1 so that the color temperature in the predetermined range is close to the color temperature of the range in which external light is incident in the predetermined range. The temperature may be controlled.

  Further, when the control unit 2 includes the human sensor unit 6, the control unit 2 may control the light source 1 only when the human sensor unit 6 detects a person. The control unit 2 may change a predetermined range detected by the illuminance sensor unit 4 or the color temperature sensor unit 5 with the person detected by the human sensor unit 6 as the center.

  Next, the operation of the above-described lighting device will be described with reference to the flowchart of FIG. 2 and the specific examples of FIGS.

  First, in step S1, the lighting device is turned on by a switch operation (not shown).

  In the next step S2, the control unit 2 turns on the plurality of light sources 1. Note that the light source 1 to be turned on in step S2 may be arbitrary. For example, the light source 1 may be turned on so that the floor surface 102 of the room has a uniform illuminance, or the light source 1 may be turned on so as to have a preset illuminance.

  In the next step S3, the illuminance sensor unit 4 detects illuminance in a predetermined range (detection range). For example, as shown in FIG. 3, it is assumed that an illuminating device 10 including a plurality of light sources 1 is installed on a ceiling 101 and illuminates a floor surface 102 with illumination light L1. In this case, the illuminance sensor unit 4 detects the illuminance in the elliptical range on the floor surface 102. As a result of this detection, outside light L2 enters from the outside light side 103 of the floor surface 102, and the illuminance I1 of the area 102a on the outside light side 103 is higher than the illuminance I2 of the area 102b on the wall surface 104 side. . Note that Ic in FIG. 3 is an illuminance control value (predetermined value) that is a predetermined target illuminance of the floor surface 102.

  In the next step S4, the determination unit 3 determines whether or not the illuminance of the floor surface 102 as the detection range is greater than or equal to a predetermined value. At this time, the determination unit 3 determines whether or not the illuminance detected for each predetermined unit area on the floor surface 102 is equal to or greater than the illuminance control value Ic. As the illuminance control value Ic, a value such as 400 Lx can be used. By this step S4, the control unit 2 determines the light source 1 to be controlled based on the distribution of the illumination physical quantity detected by the illuminance sensor unit 4.

  As shown in FIG. 3, when there is a region 102a on the outside light side 103 higher than the illuminance control value Ic and a region 102b on the wall surface 104 side lower than the illuminance control value Ic, the light source 1 corresponding to the illuminance distribution is present. Determined. Thereby, the control part 2 determines with the light source 1 which irradiates the illumination light L1 to the floor surface 102 as a control object.

  In the area 102a on the external light side 103 in FIG. 3, the detected illuminance I1 is equal to or greater than the illuminance control value Ic. Therefore, in step S <b> 5, the control unit 2 controls to lower the illuminance around the light source 1 corresponding to the region 102 a (bright part) on the outside light side 103.

  In the region 102b on the wall surface 104 side in FIG. 3, the detected illuminance I1 is not greater than or equal to the illuminance control value Ic. Therefore, in step S6, the control unit 2 controls to increase the illuminance around the light source 1 corresponding to the region 102b (dark portion) on the wall surface 104 side.

  As a result, as shown in FIG. 4, the illuminating device 10 turns on the light source 1 so as to irradiate a lot of illumination light L1 onto the region 102b on the wall surface 104 side. As a result, the illuminance I1 in the region 102a on the external light side 103 can be lowered to the illuminance I1 ', and the illuminance I2 in the region 102b on the wall 104 side can be increased to the illuminance I2'.

  In the next step S7, the color temperature sensor unit 5 detects the color temperature of the region 102b on the wall surface 104 side in the floor surface 102 as a detection range. At this time, the control unit 2 turns off the light source 1 for a predetermined short period of time and puts only the external light L2. Then, the control unit 2 reads the color temperature detected by the color temperature sensor unit 5 during the period when the light source 1 is turned off.

  In the next step S8, the control unit 2 sets each light source 1 so that the color temperature in the detection range of the color temperature sensor unit 5 becomes the color temperature of the floor surface 102 irradiated with the external light L2 detected in step S7. Control the color temperature. At this time, the control unit 2 may bring the color temperature in the predetermined detection range close to the color temperature in the range where the external light L2 is incident.

  In such color temperature or illuminance control, a light emission pattern as shown in FIG. 5 may be obtained. This light emission pattern includes a white region 10a and a warm color region 10b. In order to realize this, the storage unit 7 stores a light emission pattern that forms a predetermined light shape by irradiating light from a preset light source 1 among the plurality of light sources 1. And the control part 2 can control the brightness | luminance or color temperature of the several light source 1 according to the light emission pattern memorize | stored in the memory | storage part 7. FIG. At this time, the control unit 2 controls to maintain the illuminance and the color temperature based on the result determined by the determination unit 3.

  In the example of FIG. 5, the warm color region 10b has a crescent shape. The light emission pattern may be a reminder of a partial solar eclipse or a crescent moon as a natural phenomenon of light. The light source 1 corresponding to the white region 10a does not have to emit light when the illuminance I1 in the region 102a on the external light side 103 is secured to the illuminance control value Ic or more. That is, the light source 1 corresponding to the white region 10a does not necessarily have to emit light constantly. Thereby, power saving can be promoted.

  When the external light L2 is incident on the region 102c on the external light side 103 as shown in FIG. 6, the control unit 2 converts the color temperature C1 in the region 102c on the external light side 103 to the color temperature control value Cc in step S7. Set to. Moreover, the control part 2 can detect the color temperature C2 of the area | region 102d by the side of the wall surface 104 by step S7. In the example of FIG. 6, the color temperature C2 of the region 102d on the wall surface 104 side is lower than the color temperature control value Cc. For example, when the color temperature of the external light L2 is 4500K and the color temperature of the region 102d on the wall surface 104 side is 2700K, the color temperature relationship is as shown in FIG.

  In the case as shown in FIG. 6, the control unit 2 controls the light source 1 to increase the color temperature of the region 102c on the wall surface 104 side. At this time, as shown in FIG. 7, the control unit 2 performs control so as to raise the color temperature of the illumination light L <b> 1 around the light source 1 corresponding to the region 102 d (the portion where the color temperature is low) on the wall surface 104 side. As a result, the color temperature C2 of the region 102d on the wall surface 104 side can be raised to C2 ', and the color temperature C2' of the region 102d on the wall surface 104 side can be brought close to the color temperature control value Cc. As a result, a region 102e in which the color temperature of the floor surface 102 is substantially uniform can be formed.

  In the next step S9, the human sensor 6 detects the person in the detection range. This detection result is read by the control unit 2. At this time, the control unit 2 reads the presence or absence of a person and the location of the person in the room based on the detection result of the human sensor unit 6.

  In the next step S10, the control unit 2 controls the light source 1 based on the detection result of the human sensor unit 6 detected in step S9. At this time, the control unit 2 may turn off the light source 1 when there is no person. Further, the control unit 2 may change the place where the person is present to the center of the detection range of the illuminance sensor unit 4 or the color temperature sensor unit 5.

  For example, as shown in FIG. 8, when there is no person on the floor 102, the light source 1 in the lighting device 10 may be turned off. Then, as shown in FIG. 9, when the person P exists on the floor surface 102, the floor surface 102 around the place where the person P is present is changed to the detection range of the illuminance sensor unit 4 and the color temperature sensor unit 5. Thereby, illumination intensity and color temperature can be controlled centering on the place where the person P exists.

  The illuminating device 10 returns a process to step S3 after control of step S10.

  As described above, according to the illuminating device shown as the present embodiment, the correspondence relationship between the distribution of the illumination physical quantity and the light source to be controlled is stored, and the control target is set based on the detected illuminance distribution. The light source 1 can be determined. Then, when it is determined that the illuminance is not equal to or higher than the predetermined value, the lighting device increases the illuminance and approaches the predetermined value. On the other hand, when it is determined that the illuminance is equal to or higher than the predetermined value, the illuminance is lowered to approach the predetermined value. At this time, it is desirable for the lighting device to bring the illuminance closer to a predetermined value for each place in a predetermined range such as the floor surface 102. Thereby, according to an illuminating device, it can adjust so that it may become appropriate brightness, even if external light exists.

  Moreover, according to this illuminating device, the energy of the external light L2 can be effectively used to the maximum, and only a dark part far from the external light L2 can be efficiently illuminated. Thereby, according to an illuminating device, required electric power can be suppressed by using passive natural energy effectively and controlling the light source 1 separately.

  Furthermore, according to this illuminating device, the color temperature in the predetermined range can be brought close to the color temperature in the range where the external light is incident in the predetermined range. Thereby, according to an illuminating device, it can adjust to the color temperature substantially the same as external light L2 also in a part far from external light L2. Therefore, according to this illuminating device, it is possible to eliminate discomfort and discomfort due to a gap in the color temperature between the location where the external light L2 is incident and the location where the illumination light L1 is illuminated. Further, even in a place far from the outside light L2, it is possible to create a natural environment where the outside light L2 reaches the hand, and to give the user a natural feeling.

  Furthermore, according to this illuminating device, the plurality of light sources 1 are composed of LEDs arranged in a predetermined direction within the housing. And the control part 2 can select the LED which adjusts a brightness | luminance or color temperature among several LED, and can control the range which adjusts illumination intensity or color temperature among predetermined ranges. Thereby, according to an illuminating device, LED can be individually controlled among LED arranged in the predetermined direction so that the illumination intensity or color temperature of the floor surface 102 may become a predetermined value. Thereby, the illuminating device can be adjusted so as to have appropriate brightness and color temperature even in the presence of external light.

  Furthermore, according to this illuminating device, the light emission pattern which irradiates light from the light source 1 set beforehand among several light sources 1 and forms a predetermined light shape is memorize | stored, According to the light emission pattern, the light sources 1 Control brightness or color temperature. Thereby, according to the illuminating device, a natural feeling can be given to the user while staying indoors by using a light emission pattern such as a crescent moon. Furthermore, by setting the same color temperature as that of the outside light side 103, it is possible to recall outside natural light and to further improve the natural feeling.

  Furthermore, according to this lighting device, the light source 1 is controlled only when the human sensor 6 detects a person. Thereby, according to the illuminating device, it can avoid lighting the light source 1 when a person is not on the floor surface 102, and can reduce electric power. Moreover, according to the illuminating device, it can change to the center of the detection range of the illumination intensity sensor part 4 or the color temperature sensor part 5 in the part in which a person exists. Therefore, according to this illuminating device, the light source 1 can be controlled centering on a person's work place, and while saving energy by effective use of the external light L2, human workability and comfort can be improved at the same time. it can.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

DESCRIPTION OF SYMBOLS 1 Light source 2 Control part 3 Judgment part 4 Illuminance sensor part 5 Color temperature sensor part 6 Human sensor part 7 Memory | storage part 10 Illumination device

Claims (6)

A plurality of light sources capable of adjusting lighting physical quantities including at least luminance;
Detecting means for detecting illuminance within a predetermined range in which light can be irradiated by the plurality of light sources;
Storage means for storing a correspondence relationship between the distribution of the illumination physical quantity detected by the detection means and the light source to be controlled;
Determination means for determining whether or not the illuminance within the detection range detected by the detection means is a predetermined value or more;
The light source to be controlled is determined based on the distribution of the illumination physical quantity detected by the detection means with reference to the correspondence relationship between the illumination physical quantity distribution stored in the storage unit and the light source, and the determination means If it is determined that the illuminance is not equal to or greater than a predetermined value, the luminance of the light source to be controlled is increased so as to increase the illuminance in the predetermined range and approach the predetermined value, and the illuminance is A control unit that lowers the luminance of the light source to be controlled so as to reduce the illuminance in the predetermined range and approach the predetermined value when it is determined as above,
A lighting device characterized by comprising: The plurality of light sources can adjust the color temperature of light to be irradiated,
The detecting means detects a color temperature in the predetermined range;
The said control part controls the color temperature of each said light source so that the color temperature in the said predetermined range may be approximated to the color temperature of the range which external light injects into the said predetermined range. Lighting device. The plurality of light sources are LEDs arranged in a predetermined direction in a housing,
The said control part selects the LED which adjusts a brightness | luminance or color temperature among several LED, and controls the range which adjusts illumination intensity or color temperature among the said predetermined range. The lighting device described in 1. The storage means stores a light emission pattern that forms a predetermined light shape by irradiating light from a preset light source among the plurality of light sources,
The lighting device according to claim 1, wherein the control unit controls luminance or color temperature of a plurality of light sources according to a light emission pattern stored in the storage unit. A human sensor,
The lighting device according to any one of claims 1 to 4, wherein the light source is controlled only when the human sensor detects a person. A human sensor,
The lighting device according to any one of claims 1 to 5, wherein a predetermined range detected by the detection unit is changed around a person detected by the human sensor.

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