JP2012114028A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting apparatus which makes it possible to remotely control only a desired one of a number of installed lighting devices in a reliable and simple manner without hesitation, as well as to prevent erroneous operation in switching of light-emitting states.SOLUTION: A lighting apparatus comprises a light-emitting part 2 which emits illumination light; at least two light-receiving parts 32 which receive operation light in a visible range of the light spectrum, which is output from operation means such as a laser pointer; a photoelectric conversion element 31 provided in the light-receiving parts 32 or at a position where light received by the light-receiving parts 32 is derived; and a switching part 4 which changes light-emitting states of the light-emitting part 2 based on an output signal from the photoelectric conversion element 31. The light-receiving parts 32 are installed around the light-emitting part 2 separately from each other, and the switching part 4 is configured in such a way that if, after an output signal greater in value than a prescribed value is output from the photoelectric conversion element 31, an output signal greater in value than the prescribed value is output again within a prescribed time, the light-emitting state of the light-emitting part 2 is switched.

Description

  The present invention relates to a lighting device that can be remotely operated without using a dedicated controller such as an infrared remote controller.

  In meeting rooms and offices, instead of turning all the ceiling lights on and off all at once with a single switch, the ceiling lights are divided into several groups so that each group can be turned on and off independently. There are many.

  The reason for adopting such a lighting system is, for example, in a conference room, in order to make it easy to see the image projected on the screen by allowing the front of the screen used at the time of presentation to be turned on and off independently of other lights. In addition, in a large room such as an office, for example, only necessary illumination can be turned on from an ecological point of view.

  By the way, in such an illumination system, as a matter of course, it is necessary to provide switches as many as the number of independent illuminations by attaching a switch panel to the wall.

  If the switches are gathered in one place as in the switch panel described above, it is difficult to know which switch corresponds to which illumination, and it becomes difficult to operate the desired illumination without hesitation. Furthermore, in order to turn on and off the illumination, it is necessary to go to the switch panel, which is troublesome especially in a large room.

  Such troublesomeness becomes remarkable when, for example, a presentation is given in a conference room. Specifically, when going from discussion to presentation during a meeting, if you go to the switch panel to turn off the lighting in front of the screen, the flow of the meeting will be interrupted, and the lighting to be switched If the switch corresponding to is difficult to understand, the operation may be time consuming and the progress may be hindered.

  Therefore, in Patent Documents 1 and 2, one sensor is provided in the vicinity of each fluorescent lamp, and the fluorescent lamp can be turned on and off by pointing the sensor associated with the desired fluorescent lamp with a laser pointer. The configuration is disclosed.

  However, in such a device, on / off control is performed with visible light, so there is a high risk of malfunction due to light from a fluorescent lamp or the like. Specifically, in the fluorescent lamps described in Patent Documents 1 and 2, background noise due to light from a fluorescent lamp in the vicinity appears strongly in the output signal from the sensor. Even if it hits, it is difficult to distinguish each of them, and the on / off control of the fluorescent lamp may not be performed well, or it may be switched on / off without being irradiated with the laser beam.

  However, if modulated light is used for the operation light to prevent the malfunction described above, a commercially available laser pointer cannot be used, and if special light such as infrared light or ultraviolet light is used, the operator cannot see it. Inconvenience that the usability becomes worse.

JP 2009-259540 A JP 2009-32442 A

  The present invention has been made in order to solve the above-described problems all at once, and can reliably and easily be remotely operated without losing the desired light from among a large number of lights, and can emit light. It aims at providing the illuminating device which can prevent the malfunctioning in state switching.

  That is, the illuminating device of the present invention includes a light emitting unit that emits illumination light, at least two light receiving units that receive operation light that is visible region light output from operation means provided separately such as a laser pointer, A photoelectric conversion element that is provided at a position from which the light received by the light receiving unit or the light received by the light receiving unit is derived, and that outputs an output signal having a value corresponding to the amount of light received by the light receiving unit; A switching unit that switches a light emitting state of the light emitting unit based on an output signal, the light receiving unit is provided apart from each other around the light emitting unit, and the switching unit is a predetermined distance from the photoelectric conversion element. When an output signal having a value greater than the predetermined value is output again within a predetermined time after the output signal having a value greater than the output value is output, the light emission state of the light emitting unit is switched. And features.

  If it is such, since each light-receiving part is mutually spaced apart, a time difference will arise in the output signal from a photoelectric conversion element by the operation light received by each light-receiving part when operating light is crossed. Furthermore, since the switching unit is configured to switch the light emitting state of the light emitting unit when the operation light is incident on each light receiving unit with a time difference, background noise due to illumination light is output as an output signal. Even if the vehicle is on the vehicle, it is possible to prevent a malfunction from occurring when switching the light emission state.

  Further, since it is not necessary to consider the influence of background noise, each light receiving unit can be arranged at a position that is easily understood by the operator around the light emitting unit. It is possible to easily and surely apply the operation light to each light receiving section simply by crossing.

  In this way, for example, it is possible to easily and reliably use the operation light, which is light in the visible region, while preventing the light emission state of the light emitting unit from being switched by light incident on each light receiving unit without time difference, such as illumination light from the light emitting unit. The light emission state can be switched.

  Moreover, since malfunction can be prevented by switching the light emission state of the light emitting unit based on an output signal having a time difference caused by operation light, an infrared remote controller using infrared light modulated as in the past is used. There is no need, and continuous and visible light can be used as the operation light. For example, a laser pointer or the like can be used.

  In order to make it easier to understand the direction in which the operation light crosses each light receiving part, and to make it easy to switch the light emitting state of the light emitting part and to operate it, the light emitting part is linear. The plurality of light receiving units are arranged in a line to form a light receiving column, and at least two light receiving columns are arranged in parallel so as to sandwich the light emitting unit, and the switching unit performs the photoelectric conversion by light received by a certain light receiving column. When an output signal having a value larger than the predetermined value is output from the element, and an output signal having a value larger than the predetermined value is output from the photoelectric conversion element by light received by another light receiving column within a predetermined time. What is necessary is just to switch the light emission state of the said light emission part.

  In order to allow each of the light receiving portions to receive operation light in a wide range and to increase the degree of freedom of layout of the photoelectric conversion elements in the illuminating device, the side surface of the light guide having the long light receiving portion The light guide is configured to introduce the light received by the light receiving unit into the inside, and to guide the light introduced from the light receiving unit to the outside from the end face, The photoelectric conversion element should just be provided so that the said end surface may be opposed. If it is such, since it is not necessary to provide many photoelectric conversion elements in the substantially all area | region of a board | substrate, for example, the effort concerning mounting can be reduced significantly.

  As a specific embodiment of the light guide, there is an optical fiber configured to form a notch in the front side surface as the light receiving unit, and to guide light introduced into the inside from the light receiving unit from the end surface. It is done.

  In order to make it easier to detect the output signal when the operation light is incident on each light receiving unit from the background output signal due to illumination light or the like from the light emitting unit, and to make it more difficult to cause a malfunction related to switching of the light emitting state, At least two photoelectric conversion elements are provided, each of which outputs an output signal having a value corresponding to the amount of light received by different light receiving units, and in the state where each light receiving unit is lit, A value of an output signal output from the photoelectric conversion element by the illumination light is provided at a substantially equal position, and the switching unit has a photoelectric conversion element corresponding to a certain light receiving unit and a photoelectric corresponding to another light receiving unit. When the absolute value of the difference between the output signals of the conversion elements becomes larger than a predetermined value and then becomes larger than the predetermined value again within a predetermined time, the light emitting state of the light emitting unit is switched. As long as it is configured so that.

  In order to make the operation light more easily incident on the light receiving unit, it may be provided with a diffusion plate provided so as to cover the light receiving unit and diffusing the operation light.

  Even if the number of light receiving portions is small, in order to make the operation light incident on each light receiving portion easily, the diffusion plate may be configured to diffuse the incident light in a linear shape. In this case, the operation light can be reliably received by the light receiving unit simply by crossing the linear operation light across the entire light emitting unit or the like.

  If the illumination system is provided with a plurality of illumination devices as described above, only one illumination device is turned on / off by pointing and traversing the visible operation light to only one of the illumination devices provided. Can be switched. For this reason, when there are few people, only necessary illumination can be turned on to prevent wasteful use of electricity, or even when it is desired to adjust the brightness of only a part of the room, switching can be easily performed.

  The light receiving unit can be provided in a wide range with little effort, and the operation light can be easily incident on the light receiving unit, and it is difficult to cause a malfunction in switching the light emitting state of the light emitting unit. A light emitting unit that emits light; a light receiving unit that receives operation light that is light in a visible region output from an operation unit provided separately such as a laser pointer; A light guide configured to introduce the light received by the light receiving unit to the inside and to guide the light introduced from the light receiving unit to the outside from the end surface; A photoelectric conversion element that is provided so as to face the end face and outputs an output signal having a value corresponding to the amount of light received by the light receiving unit; and based on an output signal from the photoelectric conversion element, Luminous state A switching unit that switches, as long as they are equipped.

  Further, in the conventional lighting system, since a plurality of fluorescent lamps are turned on and off by a switch as a predetermined group, the fluorescent lamp can be switched only within a predetermined pattern. If it is a lighting system, each lighting device can be switched on and off independently.For example, when there are people in the room, only the places where people are lit or the outside light near the window It can be turned off only where it enters. That is, according to the illumination system of the present invention, an illumination pattern with a very high degree of freedom can be created.

  As described above, according to the illumination device of the present invention, since at least two light receiving parts are arranged apart from each other around the light emitting part, only by crossing the operation light with respect to the periphery of the light emitting part, Operation light can be applied to each light receiving part easily and reliably. Furthermore, since the light receiving parts are arranged apart from each other, there is a time difference between the output signals of the operation light incident on the light receiving parts when the operation light is traversed. Since the light emitting state of the light emitting unit is configured to be switched based on the output signal having a time difference, the light emitting state is switched by light entering each light receiving unit without a time difference, for example, illumination light of the light emitting unit. It is possible to prevent malfunctions such as

The schematic diagram of the LED fluorescent tube which concerns on one Embodiment of this invention. The schematic diagram which shows the light emission part and light-receiving part of the LED fluorescent tube in the embodiment. The typical enlarged view of the light-receiving part in the embodiment. The functional block diagram of the LED fluorescent lamp in the embodiment. The schematic diagram which shows an example of the output signal when operating light in the embodiment is crossed. The flowchart which shows the flow of on-off switching in the embodiment. The schematic diagram which shows arrangement | positioning of the optical fiber of the LED fluorescent tube which concerns on another embodiment of this invention. The schematic diagram explaining the diffusion plate of the LED fluorescent tube which concerns on another embodiment of this invention. The schematic diagram which shows the LED fluorescent tube which concerns on different embodiment of this invention.

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

  As shown in the perspective view of FIG. 1A, the illumination device of the present embodiment is an LED fluorescent tube 100 that is attached to a fluorescent lamp body 6 provided indoors on a ceiling or the like instead of a fluorescent lamp. The LED fluorescent tube 100 is configured such that the light emission state can be switched by traversing laser light from a laser pointer as an operation means. More specifically, the LED can be driven by direct current by incorporating a direct current conversion circuit for converting alternating current into direct current on the fluorescent lamp body 6 side. Further, the switching unit 4 switches the light emission state of the light emitting unit 2 based on the output signal of the photoelectric conversion element 31 by the operation light incident on the light receiving column 3 provided around the light emitting unit 2 that emits the illumination light. It is.

  The LED fluorescent tube 100 has a substantially cylindrical shape as shown in FIG. 1, and is sandwiched between a base part 11 attached to the fluorescent lamp body 6 provided at both ends thereof and the two base parts 11. It is comprised from the cylindrical illumination part L. FIG. For example, an illumination system is configured by attaching the LED fluorescent tube 100 to a large number of fluorescent lamp bodies on the ceiling.

  As shown in the cross-sectional view of FIG. 1B and the vertical cross-sectional view of FIG. 2, the illumination unit L includes a substrate 12 on which LEDs extending in the longitudinal direction of the LED fluorescent tube 100 are mounted, A heat dissipating part 13 for dissipating a substantially rectangular parallelepiped LED extending in the longitudinal direction, provided on the back side, is engaged with the heat dissipating part 13 and bent in a substantially C shape so as to cover the front side of the substrate 12. It is comprised from the cover part 14 extended in a longitudinal direction. The cover portion 14 is translucent in this embodiment, and is configured to transmit light from a light emitting portion 22 (described later) mounted on the substrate 12. Further, the cover portion 14 is configured so that laser light incident from the outside for an on / off operation described later is incident on a wide range of the substrate 12 after the laser light is diffused.

  On the front side of the substrate 12, a light emitting unit 2 that emits illumination light in which LEDs are arranged in a longitudinal direction and are linearly arranged, and a light emitting unit 2 that is provided around the light emitting unit 2 and visible from a laser pointer that is an operating means. Two light receiving rows 3 are provided in which a plurality of light receiving portions 31 that receive the operation light that is the light of the region are arranged. The light receiving row 3 extends in the longitudinal direction in the same manner as the light emitting portion 2 and is provided in parallel and spaced apart from each other in the radial direction so as to sandwich the light emitting portion 2.

  The light emitting section 2 is provided over the longitudinal direction on the substrate 12 as shown in FIGS. 2 (a) and 2 (b). More specifically, the light emitting unit 2 is composed of LEDs which are a plurality of light emitting elements 21, and the light emitting elements 21 are provided in a line at equal intervals in the longitudinal direction on the substrate 12. .

  As shown in FIGS. 2 (b) and 3 (a), the respective light receiving portions 32 constituting the light receiving row 3 are cut into the side surfaces of the long light guide to form minute scratches. It is formed by. The light guide is configured to introduce the operation light into the inside from the light receiving unit 32 and lead out the operation light introduced into the inside from the end surface to the outside. It is provided at a position where light is led out from the inside to the outside.

  More specifically, the light guide is an optical fiber F formed by an inner core 33 and a quad 34 that covers the outer periphery, and the two optical fibers are sandwiched by an equal distance from the light emitting unit 2. , Extending in the longitudinal direction in parallel. By arranging each optical fiber F in this way, the amount of illumination light incident on each optical fiber F from the light emitting section 2 is made substantially the same. In addition, a large number of scratches formed on the side surface are formed at equal intervals in the range where the light emitting unit 2 extends, and the light receiving unit shown in each drawing is shown as a representative of a part. Yes.

  As described above, the optical fiber F is configured so as to lead out light introduced from the plurality of light receiving portions 32 formed on the side surface from the end surface to the outside, unlike the normal usage. A photoelectric conversion element 31 is provided facing the end face. That is, as shown in the enlarged view of FIG. 3B, the operation light that has entered the inside from the scratch provided on the side surface of the optical fiber F travels after repeating total reflection inside the optical fiber F, and then proceeds to Derived from the end face 35 of the optical fiber F. Since the photoelectric conversion element 31 is provided opposite to the end face 35, an output signal corresponding to the amount of light incident on the light receiving column 3 is output by the photoelectric conversion element 31. Here, in the present embodiment, the vicinity of the end face 35 of the optical fiber F extends straight, but the photoelectric conversion element 31 may be arranged at a desired position by bending, for example.

  As the photoelectric conversion element 31, for example, a device such as a CCD or a CMOS may be used, or an LED may be used as the photoelectric conversion element. In short, anything that can convert light into an electrical signal is acceptable. In the present embodiment, one is provided on each end face of each optical fiber F so that the amount of light incident on each light receiving column 3 can be detected independently.

  In the following description, for convenience of explanation, the light receiving column 3 provided on the upper side in FIG. 2 is referred to as the first light receiving column 3 (1), and the light receiving column 3 provided on the lower side is referred to as the second light receiving column 3 (2). To do. In addition, the photoelectric conversion elements 31 that output output signals corresponding to the respective light amounts of the first light receiving column 3 (1) and the second light receiving column 3 (2) are respectively referred to as the first photoelectric conversion element 31 (1) and the second photoelectric conversion element. The conversion element is 31 (2).

  As shown in FIG. 5, a control unit C that performs various controls of the illumination unit L is provided inside the base unit 11. The function of the control unit C is realized by a control microcomputer having an A / D board, a timer, a CPU, a memory, etc., and at least each light receiving column 3 output by each photoelectric conversion element Based on the output signal regarding the received light, the function as the switching part 4 which controls on-off of the said light emission part 2 is exhibited.

  The switching unit 4 switches the light emitting state of the light emitting unit 2 by using the time difference that occurs when the operation light is incident on the first light receiving column 3 (1) and the second light receiving column 3 (2). It is configured. In the present embodiment, the switching unit 4 outputs a value larger than the predetermined value from another photoelectric conversion element 31 within a predetermined time after an output signal having a value larger than the predetermined value is output from one photoelectric conversion element 31. When the signal is output, the light emitting unit 2 is switched on and off.

  Further, the switching unit 4 makes it easier to detect the output signal due to the operation light even if there is background noise, and the output signal from each photoelectric conversion element 31 can be switched on and off without malfunction. The difference is used.

  Specifically, as shown in the functional block diagram of FIG. 4, the switching unit 4 calculates the difference between the output signal of the first photoelectric conversion element 31 (1) and the output signal of the second photoelectric conversion element 31 (2). The difference acquisition unit 41 to be taken and the time difference for measuring the time difference from when the absolute value of the difference signal generated by the difference acquisition unit 41 becomes larger than a predetermined value until it becomes a value larger than the predetermined value again It comprises a measuring unit 42 and a switch unit 43 that switches on and off the light emitting unit when the time difference measured by the time difference measuring unit 42 is shorter than a predetermined time. That is, it is configured to detect that the operation light has traversed each light receiving row 3 within a predetermined time, and to determine that the user has performed an operation of turning on and off.

  The operation at the on / off switching in the LED fluorescent tube 100 configured as described above will be described with reference to the flowcharts of FIGS. 5 and 6. Here, laser light emitted from a commercially available laser pointer is used as the operation light, and the laser light is continuous light and is not particularly modulated.

  When it is desired to change the LED fluorescent tube 100 from the ON state to the OFF state, the operator moves the laser light, which is the operation light, so as to cross the illumination portion L of the LED fluorescent tube 100 in the radial direction. Then, for example, as shown in FIG. 5A, the laser light passes through the first light receiving row 3 (1), the light emitting section 2, and the second light receiving row 3 (2) in this order. become.

  At this time, the output signal of each photoelectric conversion element 31 is such that the operation light is incident on the first light receiving column 3 (1) before the second light receiving column 3 (2). As shown in the graph, the first photoelectric conversion element 31 (1) first shows a pulsed output signal, and immediately thereafter, the second photoelectric conversion element 31 (2) also shows a pulsed output signal. It will be.

  When the difference acquisition unit 41 subtracts the output signal of the second photoelectric conversion element 31 (2) from the output signal of the first photoelectric conversion element 31 (1), the difference is obtained as shown in the graph of FIG. In addition, the background noise due to illumination light or the like from the light emitting unit 2 is reduced, and the output signal from the operation light becomes clear.

  Based on the output signal acquired by the difference acquiring unit 41, the time difference measuring unit 42 measures the time difference at which the operation light is incident on the first light receiving column 3 (1) and the second light receiving column 3 (2). At this time, as shown in the flowchart of FIG. 6, the time difference measurement unit 42 starts measuring time when the absolute value of the difference output signal is larger than a predetermined threshold value (step S1, S2) When the absolute value again becomes larger than the predetermined value, the measurement is finished (steps S3 and S4).

  If the time measured by the switch unit 43 is within a predetermined time, on / off switching is performed, and if it is longer than the predetermined time, on / off switching is not performed (steps S5 and S6).

  In the description of the operation, the description has been made based on the case where the light emitting unit 2 is turned on. However, even if the light emitting unit 2 is turned off, the on / off state is switched in the same manner.

  Thus, according to the LED fluorescent tube 100 of the present embodiment, two light receiving rows 3 are provided in parallel around the light emitting unit 2 so as to sandwich the light emitting unit 2 linearly provided in the longitudinal direction. Therefore, the operation light can be easily and reliably applied to each light receiving row 3 only by moving the operation light so as to cross the LED fluorescent tube 100 with respect to the longitudinal direction.

  In addition, each light receiving column 3 is formed by arranging a plurality of light receiving portions 32 in which a cut is formed in the side surface of the optical fiber F so that the operation light is introduced therein. Even if it hits, the operation light can be introduced into the optical fiber F, and the light receiving range can be easily widened. Further, when the light receiving column 3 is formed in a wide range by arranging a plurality of photoelectric conversion elements 31, it is very troublesome to arrange and wire many photoelectric conversion elements 31, but in this embodiment, two optical fibers are used. Since it is only necessary to mount F on the substrate, the mounting effort can be greatly reduced.

  Further, since the light receiving rows 3 are arranged so as to be separated from each other in parallel, a time difference can be generated in the output signals from the light receiving rows 3 when the operation light is crossed. Since the switching unit 4 is configured to detect a time difference generated when the operation light is crossed and switch the light emitting unit 2 on and off, for example, each light receiving column 3 like illumination light from the light emitting unit 2. Can be prevented from being switched on and off by light incident without time difference.

  As described above, by switching on / off using the time difference of the output signal of the photoelectric conversion element 31, even if background noise such as illumination light is output from the photoelectric conversion element 31, an on / off malfunction is caused. Can be prevented. For this reason, there is no need to use an infrared remote controller using infrared light modulated as in the prior art, and visible operation light can be used as continuous light. Accordingly, since it is possible to switch on and off while confirming the lighting device to which the operation light is pointing, only a desired lighting device can be easily and reliably operated even when there are a plurality of lighting devices.

  Other embodiments will be described.

  In the above-described embodiment, each photoelectric fiber 31 is provided on each optical fiber F so as to face the end face. However, as shown in FIG. 7, for example, the end faces of each optical fiber are collected in one place. You may comprise so that the light which each light reception row | line | column 3 received with the one photoelectric conversion element 31 may be detected. Even in such a configuration, the switching unit 4 can switch the light emitting unit 2 on and off by detecting two output signals that are not less than a predetermined value with a time difference generated when the operation light is crossed.

  As shown in FIG. 8, a cover which is a diffusion plate provided so as to cover the light emitting unit 2 and the light receiving unit 32 may diffuse incident operation light in a linear shape in the longitudinal direction. . For example, the cover may be formed of a nava sheet or the like. If this is the case, as shown in the perspective view of FIG. 8A and the plan view of FIG. 8B, the operation light irradiated onto the substrate is a straight line N extending in the longitudinal direction of the LED fluorescent tube 100. Therefore, the operation light can be made to cross the entire substrate on which the light receiving unit 32 is provided at a time. Therefore, it is possible to make the light incident on the light receiving unit 32 only by causing the operation light to cross the light emitting unit once with the laser pointer, and to switch the light emitting state of the light emitting unit more easily and reliably. Further, since the operation light can be diffused in a straight line extending in the longitudinal direction as described above, the operation light can be received without providing a large number of light receiving portions 32. For example, the light receiving parts 32 may be provided one by one with the light emitting part interposed therebetween.

  Further, as shown in FIG. 9A, the light receiving row 3 may be formed by arranging a plurality of photoelectric conversion elements 31 in a row. In this case, paying attention to the circuit configuration for connecting the photoelectric conversion elements 31 forming each light receiving column 3, a plurality of photoelectric conversion elements are connected in parallel to form independent circuits, and the operation light of each light receiving unit It suffices to be able to detect the time difference between the output signals due to. In the case of such an embodiment, as described based on an example in which a chip-type LED is used as the photoelectric conversion element 31 as shown in the enlarged view of FIG. 9B, the opening of the chip-type LED is defined in the claims. The LED chip corresponds to the light receiving unit 32, and the LED chip corresponds to the photoelectric conversion element 31.

  In addition, as a method for forming the light receiving portion on the side surface of the optical fiber, not only providing minute cuts on the side surface, but also, for example, the optical fiber can be bent at a plurality of points, and light can be introduced from there. The light receiving portion may be formed by various methods such as the above. Further, instead of providing a scratch, a plurality of minute convex portions may be provided on the side surface of the optical fiber to serve as a light receiving portion.

  In the above embodiment, the difference between the output signals from the respective photoelectric conversion elements is used to detect the time difference when the operation light is incident and switched on and off. However, when the background noise is small, the difference is calculated. You may make it detect a time difference from the output signal of each photoelectric conversion element, without taking. Specifically, the switching unit may switch the light emitting state of the light emitting unit using the output signal from each photoelectric conversion element in FIG. 5B as it is.

  In the embodiment, the two light receiving rows are provided so as to be sandwiched along the light emitting unit, but a plurality of light receiving rows may be provided in parallel. Further, instead of sandwiching the light emitting unit, a plurality of light receiving units may be provided in parallel so as to be biased to only one side. In addition, although the optical fiber is used as the light guide in the embodiment, for example, a long light guide plate may be used. In short, it is sufficient if a plurality of light receiving portions are formed by scratching the side surface, the operation light introduced from the light receiving portion is derived from the end face, and the light quantity can be detected by the photoelectric conversion element. .

  In the above-described embodiment, the switching unit is configured by a control microcomputer. However, the switching unit may be configured by a logic IC such as a flip-flop capable of latch-switching on / off states. Not only the photoelectric conversion element but also an amplifier or a filter may be provided. In addition, signal processing using an amplifier or a filter may be performed even after the difference between output signals from each light receiving unit is obtained.

  You may provide further the light-shielding filter which interrupts | blocks the light of wavelengths other than the said operation light among the light which injects into the said light-receiving part. For example, a light shielding filter may be formed on the surface of the cover portion or the like, or a light shielding filter may be provided so as to cover each light receiving portion. If this is the case, the light incident on the light receiving unit can be limited to light having the same wavelength as the operation light, and the value of the output signal output from the light receiving unit due to the amount of incident light being too large Can be prevented and whether or not the operation light is always incident can be detected.

  In the embodiment, the switching unit switches on / off of the light emitting unit. However, for example, the switching unit may switch the brightness stepwise. For example, when the operation light from the laser pointer crosses the light emitting unit, the light amount of the light emitting unit may be made brighter or darker. In this case, the increase / decrease in the amount of light may be determined in advance depending on the direction in which the operation light crosses the light emitting unit. For example, it is conceivable to increase the amount of light when traversing from right to left and to decrease the amount of light when traversing from left to right. As a specific configuration, the switching unit stores either the first photoelectric conversion element or the second photoelectric conversion element which has entered the operation light first, and the operation light is transmitted to each light receiving unit according to the result. What is necessary is just to comprise so that the order which injected may be judged.

  In the embodiment, the lighting device is a rod-shaped LED fluorescent tube, but may have other shapes. For example, an annular LED fluorescent tube may be used. Further, the illumination device is not limited to the LED fluorescent tube, and other general illumination may be used. For example, it may be a substantially rectangular surface-emitting illumination device formed by spreading LEDs on a flat surface. In such a case, since the area is larger than that of a straight tube type LED fluorescent tube, the operation light from the laser pointer can be easily incident. it can.

  You may comprise the illumination system which provided the lighting device of the said embodiment in order. In such a case, even if a large number of lighting devices are arranged, it is possible to switch on / off of the lighting device simply by pointing to the lighting device to be switched on / off by the laser pointer. It is possible to change the brightness of only a part or to light only an area necessary for a person to work. For this reason, it is possible to freely switch on / off the lighting device one by one without being limited to a fixed pattern, where it was conventionally possible to switch on / off only for each rough area by a switch. Therefore, it is possible to promote ecology such as saving electricity bills.

  In addition, various modifications and combinations of embodiments may be performed without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Illuminating device 2 ... Light-emitting part 3 ... Light-receiving part 31 ... Photoelectric conversion element 4 ... Switching part 41 ... Light introduction part F ... Optical fiber 14 ... Diffusing plate

Claims (9)

A light emitting unit for emitting illumination light;
At least two light receiving parts for receiving operation light which is light in a visible region output from operation means provided separately such as a laser pointer;
A photoelectric conversion element provided at a position from which the light received by the light receiving unit or the light receiving unit is derived and outputting an output signal having a value corresponding to the amount of light received by the light receiving unit;
A switching unit that switches a light emitting state of the light emitting unit based on an output signal from the photoelectric conversion element,
The light receiving unit is provided around the light emitting unit and spaced apart from each other;
When the switching unit outputs an output signal having a value larger than the predetermined value from the photoelectric conversion element, and when an output signal having a value larger than the predetermined value is output again within a predetermined time, the light emitting unit An illumination device configured to switch a light emission state. The light emitting portion is linear;
A plurality of the light receiving portions are arranged in a line to form a light receiving row, and at least two light receiving rows are arranged in parallel so as to sandwich the light emitting portion,
When the switching unit outputs an output signal having a value larger than a predetermined value from the photoelectric conversion element by light received by a certain light receiving column, the photoelectric conversion element by light received by another light receiving column within a predetermined time. The illuminating device according to claim 1, wherein the lighting device is configured to switch a light emission state of the light emitting unit when an output signal having a value larger than a predetermined value is output from the light source. The light receiving part is provided on the side of the light guide having a long shape,
The light guide is configured to introduce the light received by the light receiving unit into the inside, and to guide the light introduced from the light receiving unit to the outside from the end surface,
The lighting device according to claim 1, wherein the photoelectric conversion element is provided so as to face the end face.   The lighting device according to claim 3, wherein the light guide is an optical fiber configured to form a cut on a side surface as the light receiving unit, and to guide light introduced into the inside from the light receiving unit from an end surface. At least two photoelectric conversion elements are provided, each of which outputs an output signal having a value corresponding to the amount of light received by different light receiving parts,
In the state where each light receiving unit is lit on the light emitting unit, the value of the output signal output from the photoelectric conversion element by the illumination light is provided at a substantially equal position,
The switching unit again within a predetermined time after the absolute value of the difference between the output signals of the photoelectric conversion element corresponding to a certain light receiving unit and the photoelectric conversion element corresponding to another light receiving unit is larger than the predetermined value. The lighting device according to claim 1, 2, 3, or 4, wherein the lighting device is configured to switch a light emitting state of the light emitting unit when the value is larger than a predetermined value.   The illuminating device according to claim 1, further comprising a diffusion plate provided so as to cover the light receiving unit and diffusing the operation light.   The lighting device according to claim 6, wherein the diffusion plate is configured to diffuse incident light in a linear shape.   An illumination system comprising a plurality of illumination devices according to claim 1. A light emitting unit for emitting illumination light;
A light-receiving unit that receives operation light that is visible region light output from a separate operation unit such as a laser pointer, and that is provided around the light-emitting unit; and
The light receiving portion is provided on a side surface, and is configured to introduce light received by the light receiving portion into the inside, and to guide light introduced from the light receiving portion to the outside from the end face. A light guide,
A photoelectric conversion element that is provided to face the end face and outputs an output signal having a value corresponding to the amount of light received by the light receiving unit;
And a switching unit that switches a light emitting state of the light emitting unit based on an output signal from the photoelectric conversion element.