JP2010033763A - Illumination system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination system with flexibility in installation places maintained, and capable of alleviating stress on eyes. <P>SOLUTION: The illumination system includes a light-emitting module 11, a lighting circuit 12 lighting the light-emitting module 11, a control part 13 controlling the lighting circuit 12, and a sensor part 14 for detecting existence of a person 10. The control part 13 controls timing from lighting start of the light-emitting module 11 to the time when a light-emission volume reaches a predetermined value, based on a distance between the person 10 detected by the sensor part 14 and the light-emitting module 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting system, and more particularly to a lighting system that controls a lighting state of a lighting fixture.

  2. Description of the Related Art Conventionally, lighting systems are known in which lighting fixtures such as incandescent lamp fixtures and fluorescent lamp fixtures are attached to the ceiling surface, and lighting control is performed by a switch provided on the wall surface, or by remote control using a remote controller and a light controller. .

  As a conventional lighting system, there is known a lighting device having a dimming function for preventing discomfort due to a sudden increase in brightness when a person who adapts to a dark environment at night turns on the lighting. This luminaire includes a switch unit for turning on illumination, an optical sensor, a clock generation unit that operates according to a signal from the switch unit, a storage unit that stores light adaptation characteristics of human eyes, and a clock from the clock generation unit. A calculation unit that calculates a dimming control signal based on a signal, a signal from an optical signal, and a signal from a storage unit; and a dimming control unit that dims a light source by the dimming control signal (for example, a patent) Reference 1).

  Although not applied to the lighting system, as a light amount control method, the light amount of the light emitting unit arranged on the operation panel of the telephone is adjusted according to the distance between the person and the telephone and the brightness around the telephone. A light quantity control method is known (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 06-176875 JP 2000-112421 A

  In recent years, thin planar light sources using organic EL (electroluminescence) elements have come to be used as lighting fixtures. Lighting fixtures that use planar light sources such as organic EL are much thinner than incandescent and fluorescent fixtures, so they are not only on the ceiling, but also on the wall and floor, where they can easily be seen by people. There is a possibility that a person or a lighting device may be installed at a short distance. When the distance between the person and the lighting device is a short distance, if the thin planar light source is turned on rapidly, there is a possibility that stress is applied to the eyes.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an illumination system capable of maintaining the degree of freedom of installation location and reducing stress on the eyes.

  The illumination system of the present invention includes a light emitting module, a lighting circuit that lights the light emitting module, a control unit that controls the lighting circuit, and a sensor unit that detects the presence of a person, and the control unit includes the Based on the distance between the person and the light emitting module detected by the sensor unit, the time from the start of lighting of the light emitting module until the amount of emitted light reaches a preset value is controlled.

  With this configuration, the time is controlled according to the distance between the person and the light emitting module, for example, the time is increased when the person and the light emitting module are at a short distance, and the time is shortened when the person is at a long distance. By doing so, it is possible to maintain the degree of freedom of the installation location of the light emitting module and reduce stress on the eyes.

  In the illumination system of the present invention, the sensor unit includes a brightness sensor that detects the brightness of at least one part around the light emitting module, and the control unit is based on a detection result of the brightness sensor. , Control the time.

  This configuration reduces the stress on the human eye by controlling the time according to the brightness of the surroundings of the light emitting module, such as lengthening the time when dark and shortening the time when bright. Is possible.

  In the illumination system of the present invention, the brightness sensor detects luminance.

  With this configuration, it is possible to reduce stress on the human eye by controlling the time according to the luminance around the light emitting module.

  In the illumination system of the present invention, the brightness sensor detects illuminance.

  With this configuration, it is possible to reduce stress on the human eye by controlling the time according to the illuminance around the light emitting module.

  In the illumination system of the present invention, the brightness sensor corrects the detection result of the brightness sensor according to the reflectance of the surface on which the illuminance is detected.

  With this configuration, more accurate illuminance can be obtained, so that it is possible to improve the accuracy of lighting control that reduces stress on the human eye.

  In the illumination system of the present invention, the sensor unit includes an image sensor that detects a person from an image captured by an imaging unit.

  With this configuration, it is possible to reduce stress on the eyes by controlling the time according to information on the distance between the person and the light emitting module detected by the image sensor.

  Further, the illumination system of the present invention comprises an infrared transmitter that transmits a lighting signal for instructing lighting to the lighting circuit by infrared, and an infrared receiver that receives the lighting signal by infrared, and the control unit includes: The distance between the infrared transmitter and the infrared receiver is measured based on the infrared rays received by the receiver, and the time is controlled according to the distance.

  With this configuration, predetermined information is transmitted from the remote controller (infrared transmitter) to the light receiver (infrared receiver) by infrared, and the distance between the person holding the remote controller and the light receiver placed near the light emitting module is measured. Thus, the distance between the person and the light emitting module can be approximately measured. By controlling the time according to the measurement result, it is possible to reduce stress on the eyes.

  In the illumination system of the present invention, the light emitting module is a planar light emitting module.

  With this configuration, it is possible to further increase the degree of freedom of the installation location of the light emitting module.

  In the illumination system of the present invention, the planar light emitting module uses an organic electroluminescence element as a light source.

  With this configuration, it is possible to further increase the degree of freedom of the installation location of the light emitting module.

  ADVANTAGE OF THE INVENTION According to this invention, while maintaining the freedom degree of an installation place, it is possible to reduce the stress with respect to eyes.

  Hereinafter, an illumination system according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an explanatory diagram of an example of an illumination system according to the first embodiment of the present invention. Moreover, FIG. 2 is a figure which shows an example of schematic structure of the illumination system which concerns on the 1st Embodiment of this invention. The illumination system of this embodiment includes a planar light emitting module 11 that uses an organic EL element as a light source, a lighting circuit 12 that lights the planar light emitting module 11, a control unit 13 that controls the lighting circuit 12, and the presence of a person 10. And a sensor unit 14 for detecting. Based on the distance between the person 10 and the planar light emitting module 11 detected by the sensor unit 14, the control unit 13 starts the lighting of the planar light emitting module 11 until the light emission amount reaches a preset value ( Hereinafter, the arrival time is also controlled.

  The planar light emitting module 11 is an example of a lighting fixture, and includes a substrate, a first electrode disposed on the substrate, a light emitting layer formed on the first electrode, and a second electrode disposed on the light emitting layer. And a power source that applies a voltage or current to both electrodes, a sealing material that prevents foreign matters from entering the electrodes and the light emitting layer, and a housing that houses and protects these members. Note that at least one of the first electrode and the second electrode is a transparent electrode such as ITO (indium tin oxide) formed on the glass substrate. In the planar light emitting module 11, the light emitting material used for the light emitting layer emits light by applying a voltage to the electrodes. The planar light emitting module 11 is disposed on the wall surface in FIG. 1, but is not limited thereto, and may be disposed on a ceiling surface or a floor surface.

  The lighting circuit 12 receives a lighting start instruction by a switch or a remote control switch arranged on a wall or the like, and starts lighting. And lighting control of the planar light emitting module 11 is carried out based on the control result of the control part 13 mentioned later.

  The control unit 13 acquires position information of the person 10 detected by the sensor unit 14 and is determined in advance from the start of lighting according to the distance between the planar light emitting module 11 and the person 10 detected by the sensor unit 14. The time until the amount of emitted light is reached (hereinafter also referred to as arrival time) is controlled. Here, the light emission amount indicates, for example, the luminance of the planar light emitting module 11.

  The sensor unit 14 includes a pyroelectric infrared sensor, and detects an object, for example, in the vicinity of the planar light emitting module 11 shown in FIG. 1 as a detection range D1. The sensor unit 14 is installed, for example, on the indoor ceiling surface. The sensor unit 14 detects the distance between the person 10 and the planar light emitting module 11 by detecting the person 10 and transmits distance information indicating the distance to the control unit 13. When a plurality of people 10 are detected, the distance information between the person 10 and the planar light emitting module 11 is the shortest. Here, when the person 10 exists in the detection range D1, the distance between the person 10 and the planar light emitting module 11 is short, and when the person 10 exists outside the detection range D1, the person 10 and the surface The distance from the light emitting module 11 is assumed to be long.

Next, operation | movement of the illumination system of this embodiment is demonstrated.
First, the sensor unit 14 always detects, detects the position of the person 10 when the switch is turned on (when lighting is started) so that the planar light emitting module 11 is lit, and sends the distance information to the control unit 13. By turning on the switch, the lighting circuit 12 is instructed to start lighting, and the lighting circuit 12 lights the planar light emitting module 11. Subsequently, when the person 10 is detected by the sensor unit 14 at the start of lighting (see FIG. 1A), the control unit 13 does not detect the person 10 by the sensor unit 14 (FIG. 1B). Control to increase the arrival time compared to (see)). A control result by the control unit 13 is sent to the lighting circuit 12, and lighting control of the planar light emitting module 11 by the lighting circuit 12 is performed.

FIG. 3 is a diagram illustrating an example of the relationship between the lighting time of the planar light emitting module 11 and the amount of emitted light.
Assuming that the output of the planar light emitting module 11 with a predetermined amount of emitted light is 100%, as shown in FIG. 3A when the distance between the person and the lighting fixture is long. On the other hand, the underlined portion is “when the distance between the person and the lighting fixture is short, as shown in FIG. 3B. In FIG. 3, the light emission amount is always a constant rate from the start of lighting of the planar light emitting module 11. The control part 13 is controlling so that it may rise.

  Further, as shown in FIG. 4, it is not always necessary to increase the amount of emitted light at a constant rate during the time from the start of lighting until the output reaches 100%. FIG. 4A is an example of the relationship between the lighting time of the planar light emitting module 11 and the amount of emitted light, and shows a case where the arrival time is short. On the other hand, FIG. 4B is an example of the relationship between the lighting time of the planar light emitting module 11 and the amount of emitted light, and shows a case where the arrival time is long.

5 and 6 specifically show a predetermined amount of emitted light and a time required to reach the amount of emitted light. FIG. 5A and FIG. 6A are examples of the relationship between the lighting time of the planar light emitting module 11 and the amount of emitted light, and show a case where the arrival time is short. FIG. 5B and FIG. 6B are examples of the relationship between the lighting time of the planar light emitting module 11 and the amount of emitted light, and show a case where the arrival time is long. In FIG. 5, the luminance is set to 1000 (cd / m ² ) as a predetermined light emission quantity, the arrival time in FIG. 5A is 0.5 (sec), and the arrival time in FIG. 0 (sec). In FIG. 6, the luminance is set to 10 (cd / m ² ) as a predetermined light emission quantity, the arrival time in FIG. 6A is 0.5 (sec), and the arrival time in FIG. 0 (sec).

FIG. 5 assumes a night scene such as a general night life, and the output of 100% in FIG. 4 is equivalent to the luminance of 1000 (cd / m ² ) in FIG. Further, FIG. 6 assumes a dark night scene that is darker than the night scene, such as when going to a toilet at midnight, and the output of 100% in FIG. 4 is equivalent to the luminance of 10 (cd / m ² ) in FIG.

  Thus, according to the illumination system of this embodiment, the arrival time can be controlled based on whether or not the person 10 exists in the detection range D1. Thereby, the stress to a human eye can be reduced.

  In the present embodiment, the planar light emitting module 11 has been described as an example of the light emitting module, but a point light source such as an LED may be used.

(Second Embodiment)
FIG. 7 is an explanatory diagram of an example of an illumination system according to the second embodiment of the present invention. Moreover, FIG. 8 is a figure which shows an example of schematic structure of the illumination system which concerns on the 2nd Embodiment of this invention. The illumination system shown in FIG. 8 includes a light emitting module 11 (planar light source, point light source, etc.), a lighting circuit 12, a control unit 13, and a sensor unit 21. In addition, about the structure same as the illumination system shown in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The sensor unit 21 includes an image sensor that detects a person or the like based on an image captured by an imaging unit (camera), and can detect an object with the entire space illustrated in FIG. 7 as a detection range D2, for example. The sensor unit 21 is installed on, for example, an indoor ceiling surface. The sensor unit 21 detects the distance between the person 10 and the light emitting module 11 by detecting the person 10, and transmits distance information indicating the distance to the control unit 13.

Next, operation | movement of the illumination system of this embodiment is demonstrated.
First, the sensor unit 21 constantly detects, detects the position of the person 10 when the switch is turned on so that the light emitting module 11 is lit (at the start of lighting), and sends the distance information to the control unit 13. By turning on the switch, the lighting circuit 12 is instructed to start lighting, and the lighting circuit 12 lights the light emitting module 11. Subsequently, the control unit 13 controls the arrival time according to the position where the person 10 is detected by the sensor unit 21 at the start of lighting. As shown in FIG. 7, in the present embodiment, the detection range D2 by the sensor unit 21 has a plurality of detection ranges, for example, detection ranges D21, D22, and D23. Can be detected. Therefore, for example, as shown in FIG. 7A, when a person 10 exists in the detection range D21, the arrival time is t21, and the light emitting module is more than the detection range D21 as shown in FIG. 7B. When the person 10 exists in the detection range D23 having a long distance to 11, the control unit 13 can control the arrival time to be t23 (t23 <t21).

  Thus, according to the illumination system of the present embodiment, the arrival time can be controlled more finely based on which detection range of the plurality of detection ranges the person 10 is present. Thereby, the stress to a human eye can be reduced.

(Third embodiment)
FIG. 9 is an explanatory diagram of an example of an illumination system according to the third embodiment of the present invention. Moreover, FIG. 10 is a figure which shows an example of schematic structure of the illumination system which concerns on the 3rd Embodiment of this invention. The illumination system shown in FIG. 10 includes a light emitting module 11, a lighting circuit 12, a control unit 13, an infrared transmitter (remote controller) 31, and an infrared receiver 32. In addition, about the structure same as the illumination system shown in 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The infrared transmitter 31 transmits a lighting signal for lighting the light emitting module 11 by infrared rays. The infrared receiver 32 is an example of an infrared receiver, and receives a lighting signal from the infrared transmitter 32. At this time, the infrared receiver 32 receives the lighting signal by infrared rays.

Next, operation | movement of the illumination system of this embodiment is demonstrated.
First, the infrared transmitter 31 transmits a lighting signal so that the light emitting module 11 is lit, and the infrared receiver 32 receives the lighting signal. The infrared receiver 32 measures the distance from the infrared transmitter 32 by a lighting signal, that is, infrared rays, and sends the measurement result to the control unit 13 as distance information. When the infrared receiver 32 receives the lighting signal, the lighting circuit 12 is instructed to start lighting, and the lighting circuit 12 lights the light emitting module 11. Subsequently, a threshold for comparison with the distance information is determined in advance, the distance information is compared with the threshold, and the control unit 13 controls the arrival time according to the comparison result. A plurality of threshold values may be set. In this case, the arrival time can be finely controlled. Therefore, for example, as illustrated in FIG. 9A, when the control unit 13 determines that the person 10 exists in the area D33 based on the threshold value and the distance information, the arrival time is set to t33, and the time illustrated in FIG. As illustrated, when the control unit 13 determines that the person 10 exists in the area D32 based on the threshold value and the distance information, the control unit 13 can control the arrival time to be t32 (t33 <t32). Further, the control unit 13 may control the arrival time based only on the distance information without using the threshold value.

  As described above, according to the illumination system of the present embodiment, the arrival time can be controlled more finely using the infrared transmitter 31 and the infrared receiver 32 based on which of the plurality of areas the person 10 is present. It is. Thereby, the stress to a human eye can be reduced.

(Fourth embodiment)
FIG. 11 is an explanatory diagram of an example of an illumination system according to the first embodiment of the present invention. Moreover, FIG. 12 is a figure which shows an example of schematic structure of the illumination system which concerns on the 4th Embodiment of this invention. The illumination system shown in FIG. 12 has a configuration including a light emitting module 11, a lighting circuit 12, a control unit 13, and a sensor 41. Further, although not shown in FIG. 12, the sensor 14, the sensor 21, or the infrared transmitter 31 and the infrared receiver 32 in the previous embodiment are included. In addition, about the structure same as the illumination system shown in the 1st-3rd embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  The sensor unit 41 includes an illuminance sensor, is installed near the light emitting module 11 (a wall surface in FIG. 11), and measures the illuminance of the space around the light emitting module 11. In this case, at least one illuminance around the light emitting module 11 is measured. The sensor unit 41 sends illuminance information to the control unit 13 as a measurement result.

Next, operation | movement of the illumination system of this embodiment is demonstrated.
First, the lighting circuit 12 is instructed to start lighting by the method described in any of the previous embodiments, and the lighting circuit 12 lights the light emitting module 11. Subsequently, the sensor unit 41 measures the illuminance of the space around the light emitting module 11 at the start of lighting, and sends illuminance information as a measurement result to the control unit 13. Subsequently, in the control unit 13, the control unit 13 controls the arrival time according to the illuminance information together with the distance information described in the previous embodiment. When the illuminance information is used, a threshold for comparison with the illuminance information may be determined in advance, the illuminance information and the threshold may be compared, and the control unit 13 may control the arrival time according to the comparison result. Therefore, when the illuminance around the light emitting module 11 is low as compared with the case where the illuminance around the light emitting module 11 is high, the control unit 13 performs control so as to increase the arrival time. For example, FIG. 11 shows a case where an illuminance sensor and an image sensor are combined, and shows a case where a person 10 exists in the detection range D1. However, in FIG. 11A, the illuminance around the wall surface 42a where the light emitting module 11 which is the periphery of the light emitting module 11 is low, and in FIG. 11B, the illuminance around the wall surface 42b is high. In the example of FIG. 11, the arrival time is controlled to be longer in the case of FIG. 11A than in the case of FIG. Further, FIG. 11 shows a state in which the detection range D4 by the sensor unit 21 has a plurality of detection ranges D41, D42, and D43.

  Thus, according to the illumination system of the present embodiment, the arrival time can be controlled according to the illuminance of the light emitting module 11. Thereby, the stress to a human eye can be reduced.

  In the present embodiment, it is shown that the sensor unit 41 includes an illuminance sensor. However, instead of the illuminance sensor, a luminance sensor is provided, and the luminance of at least one point around the planar light emitting module 11 is measured. Good.

  In addition, the reflectance of the surface for measuring illuminance (measurement surface in the illuminance sensor) is measured in advance when the light emitting module 11 is installed, and the sensor unit 41 corrects the illuminance value measured at the start of lighting according to the reflectance. May be. For example, if the illuminance of the surface to measure illuminance is the same, and there are low and high reflectivity surfaces, the low reflectivity surface will have lower brightness than the high reflectivity surface. , It feels dark in human eyes. Therefore, when the illuminance is the same and the reflectivity is different, the stress on the eye when the light emitting module 11 is turned on is different, but by correcting the illuminance value according to the reflectivity of the illuminance measurement surface, to the human eye Can reduce stress.

  In the illumination systems according to the second to fifth embodiments, the relationship between the lighting time of the light emitting module 11 and the amount of emitted light is the same as that shown in FIGS.

  The illumination system of the present invention is useful as an illumination system that can maintain the degree of freedom of the installation location and reduce stress on the eyes.

Explanatory drawing of an example of the illumination system which concerns on the 1st Embodiment of this invention. The figure which shows an example of schematic structure of the illumination system which concerns on the 1st Embodiment of this invention The figure which shows an example of the relationship between the lighting time of the light emitting module which concerns on embodiment of this invention, and emitted light quantity (when the emitted light quantity increase rate is constant) The figure which shows an example of the relationship between the lighting time of the light emitting module which concerns on embodiment of this invention, and emitted light quantity (when the emitted light quantity increase rate is not constant) The figure which shows an example of the relationship between the lighting time of the light emitting module which concerns on embodiment of this invention, and emitted light amount (in the case of a night scene) The figure which shows an example of the relationship between the lighting time of the light emitting module which concerns on embodiment of this invention, and emitted light amount (in the case of a midnight scene) Explanatory drawing of an example of the illumination system which concerns on the 2nd Embodiment of this invention. The figure which shows an example of schematic structure of the illumination system which concerns on the 2nd Embodiment of this invention. Explanatory drawing of an example of the illumination system which concerns on the 3rd Embodiment of this invention. The figure which shows an example of schematic structure of the illumination system which concerns on the 3rd Embodiment of this invention. Explanatory drawing of an example of the illumination system which concerns on the 4th Embodiment of this invention. The figure which shows an example of schematic structure of the illumination system which concerns on the 4th Embodiment of this invention.

Explanation of symbols

10 person 11 light emitting module 12 lighting circuit 13 control unit 14, 21, 41 sensor unit 31 infrared transmitter 32 infrared receiver D1, D2, D4, D21 to D23, D41 to D43 detection range D31 to D33 area 42a, 42b wall surface

Claims (9)

A light emitting module;
A lighting circuit for lighting the light emitting module;
A control unit for controlling the lighting circuit;
A sensor unit for detecting the presence of a person;
With
The said control part controls the time from the lighting start of the said light emitting module until the light emission light quantity becomes a preset value based on the distance of the person and the said light emitting module detected by the said sensor part. The lighting system according to claim 1,
The sensor unit includes a brightness sensor that detects brightness of at least one part around the light emitting module,
The said control part controls the said time based on the brightness detected by the said brightness sensor Lighting system. The illumination system according to claim 1 or 2,
The brightness sensor is an illumination system that detects luminance. The illumination system according to claim 1 or 2,
The brightness sensor is an illumination system that detects illuminance. The lighting system according to claim 4,
The said brightness sensor correct | amends the detection result by the said brightness sensor according to the reflectance of the surface which detects illumination intensity. The lighting system according to claim 1,
The sensor unit includes an image sensor that detects a person from an image captured by an imaging unit. The illumination system of claim 1, further comprising:
An infrared transmitter for transmitting a lighting signal for instructing lighting to the lighting circuit by infrared;
An infrared receiver for receiving the lighting signal by infrared;
The said control part measures the distance of the said infrared transmission part and the said infrared receiving part based on the infrared rays received by the said receiving part, and controls the said time according to the said distance. The illumination system according to any one of claims 1 to 7,
The light emitting module is a planar light emitting module. The illumination system according to claim 8,
The planar light emitting module is an illumination system using an organic electroluminescence element as a light source.

Images