JP2010033849A - Lighting device and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device and a lighting fixture by which a user can recognize whether a target illuminance to be set is higher than an upper limit illuminance.
When setting illuminance instructed as target illuminance that is a target value of illuminated surface illuminance is lower than an upper limit illuminance Lu that is an upper limit of illuminance that can be realized only by a light source that is lit by a lighting device, The illuminance at setting is the target illuminance. On the other hand, when the setting illuminance Ls is higher than the upper limit illuminance Lu as indicated by a point As, the target illuminance La is set as the upper limit illuminance Lu. In this case, when the control using the new target illuminance La is started, the illuminance becomes the upper limit illuminance Lu lower than the illuminance Ls at the time of setting, so that the user can set the target illuminance La. It can be recognized that the illuminance Ls is higher than the upper limit illuminance Lu.
[Selection] Figure 1

Description

  The present invention relates to a lighting device and a lighting fixture.

  Conventionally, as an illuminating device that turns on an electrical light source, an illuminance detection unit that detects the illuminance of a surface irradiated with light from the light source is provided, and the detected illuminance detected by the illuminance detection unit is set to a predetermined target illuminance. A lighting device that changes the light output of a light source is provided (see, for example, Patent Document 1).

According to this type of lighting device, the light output of the light source is reduced during the daytime when there is a lot of light from an external light source such as the sun other than the light source that the lighting device turns on (hereinafter referred to as “external light”). While the power is reduced, the illuminance can be kept substantially constant regardless of the amount of external light by increasing the light output of the light source at night when external light is low. An example of the operation of this type of lighting device is shown in FIG. In FIG. 6, the vertical axis represents the detected illuminance, and the horizontal axis represents the light output of the light source that is turned on by the lighting device. The straight lines a0 to a3 indicate the relationship between the light output of the light source to be turned on by the lighting device and the detected illuminance, the straight line a0 indicates that no external light exists, and the straight lines a1 to a3 indicate the illuminance due to only external light (that is, A state in which the detected illuminance when the illumination device turns off the light source) is different illuminances L1 to L3.
Japanese Patent No. 3877342

  In the illumination device as described above, the illuminance that can be realized only by the light source to be turned on by the illumination device, that is, there is no external light as indicated by the point A0, and the illumination device turns on the light source with the maximum light output Pu (rated) Illuminance in a state of being lit (hereinafter referred to as “upper limit illuminance”) When an illuminance higher than Lu is set as the target illuminance La, there is a sufficiently large amount of external light as in the straight lines a1 to a3. Then, even if the external light decreases as in L3, L2, and L1, the detected illuminance can be maintained at the target illuminance La by increasing the light output of the light source as in point B3, point B2, and point B1, In a state where the external light is reduced so that the difference between the target illuminance La and the upper limit illuminance Lu (La−Lu = L1) cannot be filled, the detected illuminance cannot be maintained at the target illuminance La, and the outside as indicated by the point A0. There is light Detection illuminance in the stomach state decreases to the upper limit luminance Lu.

  As described above, when the target illuminance La is higher than the upper limit illuminance Lu, the illuminance cannot be maintained at the target illuminance La when the external light is low. However, it is difficult for the user to recognize whether the target illuminance La to be set is higher than the upper limit illuminance Lu.

  The present invention has been made in view of the above reasons, and an object thereof is to provide a lighting device and a lighting fixture that allow a user to recognize whether the target illuminance to be set is higher than the upper limit illuminance. There is to do.

  According to the first aspect of the present invention, there is provided a lighting unit for supplying electric power to an electric light source whose light output changes according to the supplied electric power, and an illuminance for detecting the illuminance of a surface irradiated with light from the light source. A detection unit, an instruction input unit that receives an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit, and a target illuminance is determined based on the instruction received by the instruction input unit. A control unit that controls the lighting unit so that the illuminance detected by the detection unit becomes the target illuminance, and the control unit sets the target illuminance above the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source. When an instruction to increase is input to the instruction input unit, the target illuminance is set as the upper limit illuminance.

  According to this invention, when the illuminance that the user is trying to set as the target illuminance is higher than the upper limit illuminance, the upper limit illuminance lower than the above illuminance is set as the new target illuminance. The user can recognize that the target illuminance to be set is higher than the upper limit illuminance because the illuminance after the start of the corresponding control is lower than the above illuminance to be set as the target illuminance. it can. Further, since the target illuminance does not become higher than the upper limit illuminance, the illuminance can be reliably maintained at the target illuminance even when there is no external light.

  The invention according to claim 2 is a lighting unit that supplies power to an electric light source whose light output changes according to the supplied power and lights it, and an illuminance that detects the illuminance of the surface irradiated with the light from the light source. A detection unit, an instruction input unit that receives an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit, and a target illuminance is determined based on the instruction received by the instruction input unit. A control unit that controls the lighting unit so that the illuminance detected by the detection unit is the target illuminance, and the target illuminance is made higher than the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source. An error sound generation unit that generates a predetermined error sound when an instruction is input to the instruction input unit is provided.

  According to this invention, the user can recognize from the error sound that the target illuminance to be set is higher than the upper limit illuminance.

  According to a third aspect of the present invention, there is provided a lighting unit for supplying electric power to an electric light source whose light output changes according to the supplied electric power, and an illuminance for detecting an illuminance of a surface irradiated with light from the light source. A detection unit, an instruction input unit that receives an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit, and a target illuminance is determined based on the instruction received by the instruction input unit. A control unit that controls the lighting unit so that the illuminance detected by the detection unit is the target illuminance, and the target illuminance is made higher than the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source. An error display unit that visually notifies when an instruction is input to the instruction input unit is provided.

  According to this invention, the user can recognize that the target illuminance to be set is higher than the upper limit illuminance by displaying on the error display section.

  According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, a maximum output notification sound generating unit that generates a predetermined maximum output notification sound when the light output of the light source reaches a maximum is provided. Features.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the control unit is configured such that the target illuminance setting instruction is input to the instruction input unit each time the target illuminance is set. A light output excess sound generating unit for holding a light output of a light source as a light output at the time of setting, and generating a predetermined light output excess sound when the light output of the light source exceeds the light output at the time of setting. And

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, a maximum output display unit that visually notifies when the light output of the light source reaches a maximum is provided.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the invention, the control unit is configured such that the target illuminance setting instruction is input to the instruction input unit each time the target illuminance is set. The light output of the light source is held as a light output at the time of setting, and includes a light output excess display unit that visually notifies when the light output of the light source exceeds the light output at the time of setting.

  The invention of claim 8 is characterized in that, in any one of the inventions of claims 1 to 7, the instruction input unit receives a wireless signal transmitted from outside and instructing setting of the target illuminance.

  The invention of claim 9 is characterized by comprising the illumination device according to any one of claims 1 to 8 and an appliance main body for holding the illumination device.

  According to the first aspect of the present invention, when the illuminance that the user intends to set as the target illuminance is higher than the upper limit illuminance, the upper limit illuminance lower than the above illuminance is set as the new target illuminance. The user recognizes that the target illuminance to be set is higher than the upper limit illuminance because the illuminance after the start of control according to the target illuminance is lower than the above illuminance to be set as the target illuminance. can do. Further, since the target illuminance does not become higher than the upper limit illuminance, the illuminance can be reliably maintained at the target illuminance even when there is no external light.

  According to the second aspect of the present invention, when an instruction for increasing the target illuminance to be higher than the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source to be lit by the lighting unit is input to the instruction input unit. Since the error sound generation unit for generating the error sound is provided, the user can recognize from the error sound that the target illuminance to be set is higher than the upper limit illuminance.

  According to the third aspect of the present invention, when an instruction for increasing the target illuminance to be higher than the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source to be lit by the lighting unit is visually input. Since the error display unit for notifying is provided, the user can recognize that the target illuminance to be set is higher than the upper limit illuminance by displaying the error display unit.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
As shown in FIG. 2, the lighting device 1 of the present embodiment includes a lighting unit 11 that supplies power to an electrical light source that changes its light output according to the supplied power, and lights the light. Illuminance detection unit 12 that detects the illuminance of a surface such as a floor surface or a desk surface to be irradiated (hereinafter referred to as “illuminated surface”), an instruction input unit 13 that receives input of various instructions from the outside, and illuminance And a control unit 14 that controls the lighting unit 11 in accordance with the illuminance detected by the detection unit 12 and the instruction received by the instruction input unit 13.

  The lighting unit 11 changes the power supplied to the light source in accordance with a dimming signal input from the control unit 14 and instructing the light output of the light source. The dimming signal is, for example, a ratio of an instructed light output to a light output (that is, a maximum light output) at the time of rated lighting of a light source (hereinafter simply referred to as “electrical light source”) that is lit by the lighting unit 11 (hereinafter referred to as “lighting”). , Referred to as “light control ratio”). For example, a fluorescent lamp or an incandescent lamp can be used as the electric light source. When a fluorescent lamp is used as the electric light source, the lighting unit 11 is a known device that changes the light output of the electric light source by changing the frequency of the output power to the electric light source in accordance with the input dimming signal. An electronic ballast can be used. When an incandescent lamp is used as the electrical light source, the lighting unit 11 may be a known circuit that changes the light output of the electrical light source by phase control according to the input dimming signal.

  The illuminance detection unit 12 includes a known light receiving element that generates an electrical signal according to the amount of incident light, such as CdS or a photodiode, for example, and the direct current has a higher voltage value as the amount of light incident on the light receiving element increases. The illuminance detection voltage, which is a voltage, is output to the control unit 14. The light receiving element of the illuminance detection unit 12 is disposed at a position where light emitted from the electric light source and reflected by the illuminated surface is incident, and light is not directly incident from the electric light source.

  The instruction input unit 13 may be configured by using a known push button switch or dip switch that accepts a manual operation, or by a known receiving circuit that receives a wireless signal. Also good. As the wireless signal medium, infrared light or radio waves can be used. In any case, the receiving circuit can be realized by a well-known technique, and detailed illustration and description thereof will be omitted. When the instruction input unit 13 receives a wireless signal, the instruction input unit 13 receives an operation input and transmits a wireless signal corresponding to the accepted operation input as an instruction input to the instruction input unit 13. (See FIG. 4) is used.

  The control unit 14 includes, for example, a microcomputer that has a memory that stores a program and operates according to the program.

  Next, the operation of this embodiment will be described.

  The control unit 14 includes a manual dimming mode for controlling the lighting unit 11 to turn on the electric light source with a light output according to the instruction input to the instruction input unit 13, and an illuminance detection voltage output by the illuminance detection unit 12. In response to an instruction input to the instruction input unit 13 in one of the operation modes of the automatic dimming mode in which the illuminated surface illuminance is constant by feedback-controlling the lighting unit 11 so as to be a predetermined target illuminance voltage Can be switched. The operation in the manual light control mode can be realized by a well-known technique and will not be described.

  Before operating in the automatic dimming mode, control the upper limit illuminance voltage, which is the illuminance detection voltage when the illuminated surface illuminance is the highest value (upper limit illuminance in the claims) within the range that can be realized only by the electric light source. Store in the unit 14. That is, the user may first input an instruction for setting the upper limit illuminance to the instruction input unit 13 in a state where the external light is completely blocked. When an instruction for setting the upper limit illuminance is input to the instruction input unit 13, the control unit 14 stores the illuminance detection voltage as the upper limit illuminance voltage in a state where the electrical light source is lit at the rated power (rated lighting). Here, the relationship between the illuminance detection voltage output by the illuminance detection unit 12 and the actual illuminated surface illumination depends on the reflectance of the illuminated surface, the distance between the light receiving element of the illumination detection unit 12 and the illuminated surface, and so on. It is necessary to set the upper limit illuminance voltage as described above in an environment where the operation in the automatic light control mode is actually performed.

  In order to operate in the automatic dimming mode, it is necessary to set a target illuminance voltage that is a target value of the illuminance detection voltage in the automatic dimming mode. In order to set the target illuminance voltage, the user may input an instruction for setting the target illuminance to the instruction input unit 13 in a state where the desired illuminated surface illuminance is obtained during the manual dimming mode. When an instruction for setting the target illuminance is input to the instruction input unit 13, the control unit 14 obtains the illuminance detection voltage from the illuminance detection unit 12, stores the illuminance detection voltage as the setting illuminance voltage, and sets the illuminance voltage during the setting to the upper limit illuminance voltage. Compare with If the set illuminance voltage is equal to or lower than the upper limit illuminance voltage, the set illuminance voltage is set as the subsequent target illuminance voltage. That is, if the illuminance instructed as the target illuminance is equal to or lower than the upper limit illuminance, the illuminance as instructed is set as the target illuminance. On the other hand, if the setting illuminance voltage exceeds the upper limit illuminance voltage, the upper limit illuminance voltage is set as the subsequent target illuminance voltage. That is, if the illuminance instructed as the target illuminance exceeds the upper limit illuminance, the instructed illuminance is discarded and the upper limit illuminance is set as the target illuminance.

  An example of the operation of this embodiment is shown in FIG. In FIG. 1, the vertical axis represents the detected illuminance, and the horizontal axis represents the light output of the electric light source. The straight lines a0 to a2 indicate the relationship between the light output of the electric light source and the detected illuminance, the straight line a0 indicates a state in which no external light exists, and the straight lines a1 and a2 indicate the illuminance by only the external light (that is, the electric light source). The detected illuminance when is turned off) indicates different illuminances L1 and L2.

  According to the above configuration, as shown by the point As in FIG. 1, the illuminated surface illuminance (hereinafter referred to as “setting illuminance”) Ls when an instruction for setting the target illuminance is input to the instruction input unit 13 is the upper limit. Since the target illuminance La is set to the upper limit illuminance Lu when the illuminance is higher than the illuminance Lu, when the automatic light control mode is started after the target illuminance La is set, the illuminance decreases from the set illuminance Ls to the upper limit illuminance Lu. The user can recognize that the setting illuminance Ls to be set as the target illuminance La is higher than the upper limit illuminance Lu.

  Further, since the target illuminance La does not exceed the upper limit illuminance Lu, even if the external light decreases as L2, L1,0 in FIG. 1, it is detected as point A2, point A1, point A0 in FIG. The illuminance (illumination surface to be illuminated) can be maintained at the target illuminance La. Here, when there is a possibility that the target illuminance La may not be achieved even if the dimming ratio is 100%, when the detected illuminance is lower than the target illuminance La during the automatic dimming mode, the control unit 14 further controls the dimming ratio. However, in this embodiment, the target illuminance La is always less than or equal to the upper limit illuminance Lu, so that the detected illuminance is the target. Since the dimming ratio can always be increased if the illuminance is lower than the illuminance La, the determination as described above is unnecessary, and the load on the control unit 14 is reduced.

(Embodiment 2)
Since the basic configuration of the present embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 3 and 4, the lighting device 1 according to the present embodiment is controlled by the control unit 14 when the target illuminance exceeds the upper limit illuminance when the target illuminance is set, and notifies the user. An informing unit 15 is provided.

  Further, in the present embodiment, the setting illuminance is set as the target illuminance as it is without comparing the setting illuminance with the upper limit illuminance when the target illuminance is set. You may make it be said.

  In the example of FIG. 4, the control unit 14 is controlled by a central control unit 14 a configured by an integrated circuit, a clock oscillation unit 14 b that generates a clock signal for operation of the central control unit 14 a, and the central control unit 14 a. It has a dimming signal generation unit 14 c that generates a dimming signal to be output to the lighting unit 11, and a notification driving unit 14 d that drives the notification unit 15.

  The instruction input unit 13 receives a wireless signal using infrared light as a medium transmitted from the remote controller RC using a photodiode.

  Furthermore, the notification unit 15 has a piezoelectric buzzer BZ and performs notification by sound generated by the piezoelectric buzzer BZ. That is, the notification unit 15 is an error sound generation unit in the claims, and a sound emitted from the notification unit 15 when the setting illuminance instructed as the target illuminance exceeds the upper limit illuminance is the error sound in the claims.

  According to the above configuration, when the target illuminance is set and the setting illuminance instructed as the target illuminance exceeds the upper limit illuminance, the notification of the notification unit 15 causes the user to set the target illuminance to be set to the upper limit illuminance. You can recognize that it is higher.

  In addition, instead of the notification unit 15 notifying by sound as described above, the notification unit 15 may have a light emitting diode LED and perform notification by light of the light emitting diode LED as shown in FIG. Good. In this case, the notification unit 15 serves as an error display unit in the claims.

  In the example of FIG. 5, the instruction input unit 13 is configured using a manually operated switch SW. Although only one switch SW is shown in FIG. 5, a plurality of switches SW are necessary in order to make it possible to change the dimming ratio or change the mode in the manual operation mode.

  Furthermore, when the light output of the electrical light source reaches the maximum value during the automatic dimming mode, that is, when the dimming ratio reaches 100%, the control unit 14 controls the notification unit 15 to set the dimming ratio. You may make it alert | report that it has reached 100%. If the target illuminance La is higher than the upper limit illuminance Lu, the above notification cannot maintain the illuminated surface illuminance at the target illuminance La when the external light further decreases from the time of the notification. (In other words, the illuminated surface illuminance decreases). However, if the target illuminance La is limited to the upper limit illuminance Lu or less as in the first embodiment, the above notification is performed only when the target illuminance La is the upper limit illuminance Lu and there is no external light. It becomes. In the configuration of FIG. 4, the notification unit 15 is the maximum output notification sound generation unit in the claims, and the sound emitted from the notification unit 15 when the dimming ratio reaches 100% is the maximum output notification sound in the claims. . Moreover, in the structure of FIG. 5, the alerting | reporting part 15 is a maximum output display part in a claim.

  When the target illuminance is set, the control unit 14 also keeps the light output (dimming ratio) at that time of the electrical light source to be lit by the lighting unit 11 as the light output at the time of setting, and automatically When the light output of the electric light source exceeds the light output at the time of setting during the dimming mode (that is, when the external light has decreased from the time of setting the target illuminance), the control unit 14 controls the notification unit 15 to You may make it alert | report that the light output of the target light source exceeded the light output at the time of a setting. In the configuration of FIG. 4, the notification unit 15 is the light output excess sound generation unit in the claims, and the sound emitted from the notification unit 15 when the dimming ratio exceeds the set light output is the light output excess sound in the claims. is there. Moreover, in the structure of FIG. 5, the alerting | reporting part 15 is a light output excess display part in a claim.

  Furthermore, when the instruction input unit 13 receives a wireless signal as in the configuration of FIG. 4, the control unit 14 controls the notification unit 15 when the instruction input unit 13 correctly receives the wireless signal. Notification may be performed.

  Here, a notification that the setting illuminance exceeds the upper limit illuminance, a notification that the control unit 14 controls the notification unit 15 and the dimming ratio has reached 100%, and the light output of the electrical light source is It is desirable to distinguish between the notification that the optical output has been exceeded at the time of setting and the notification that the wireless signal has been correctly received by the instruction input unit 13. Specifically, in the configuration of FIG. 4, for example, the sound frequency and the sound change pattern (such as a melody) are differentiated for each type of notification. Moreover, in the structure of FIG. 5, it distinguishes by making the blink pattern of light emitting diode LED differ for every kind of alerting | reporting, for example. Further, for example, when a light-emitting element having a variable light color, such as a light-emitting element in which light-emitting diodes of three primary colors are combined, is used for the notification unit 15, the above notification may be distinguished by changing the light color. Good. Also, the sound notification as in the example of FIG. 4 and the visual notification as in the example of FIG. 5 may be performed simultaneously.

  The various lighting devices 1 described above can constitute a lighting fixture together with an appropriately-shaped fixture body (not shown) that holds the lighting device 1. Since the fixture body and the lighting fixture as described above can be realized by a well-known technique, illustration and detailed description thereof are omitted.

It is explanatory drawing which shows operation | movement of Embodiment 1 of this invention. It is a block diagram which shows the same as the above. It is a block diagram which shows Embodiment 2 of this invention. It is a circuit block diagram which shows the same as the above. It is a circuit block diagram which shows another example same as the above. It is explanatory drawing which shows an example of operation | movement of an illuminating device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 11 Lighting part 12 Illuminance detection part 13 Instruction input part 14 Control part 15 Notification part La Target illumination intensity Lu Upper limit illumination intensity

Claims (9)

A lighting unit that supplies power to an electrical light source whose light output changes according to the supplied power and lights it;
An illuminance detector that detects the illuminance of the surface irradiated with the light of the light source;
An instruction input unit for receiving an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit;
A control unit that determines a target illuminance based on an instruction received by the instruction input unit and controls the lighting unit so that the illuminance detected by the illuminance detection unit is the target illuminance;
The control unit sets the target illuminance as the upper limit illuminance when an instruction for making the target illuminance higher than the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source is input to the instruction input unit Lighting device. A lighting unit that supplies power to an electrical light source whose light output changes according to the supplied power and lights it;
An illuminance detector that detects the illuminance of the surface irradiated with the light of the light source;
An instruction input unit for receiving an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit;
A control unit that determines a target illuminance based on an instruction received by the instruction input unit and controls the lighting unit so that the illuminance detected by the illuminance detection unit is the target illuminance;
An error sound generating unit that generates a predetermined error sound when an instruction to increase the target illuminance above the upper limit illuminance that is the maximum value of illuminance that can be realized only by the light source is input to the instruction input unit. A lighting device. A lighting unit that supplies power to an electrical light source whose light output changes according to the supplied power and lights it;
An illuminance detector that detects the illuminance of the surface irradiated with the light of the light source;
An instruction input unit for receiving an instruction to set a target illuminance to be a target value of the illuminance detected by the illuminance detection unit;
A control unit that determines a target illuminance based on an instruction received by the instruction input unit and controls the lighting unit so that the illuminance detected by the illuminance detection unit is the target illuminance;
An error display unit that visually notifies when an instruction to increase the target illuminance above the upper limit illuminance that is the maximum value of illuminance that can be achieved only by the light source is input to the instruction input unit. Lighting device.   The illumination device according to any one of claims 1 to 3, further comprising a maximum output notification sound generating unit that generates a predetermined maximum output notification sound when the light output of the light source becomes maximum. Each time the target illuminance is set, the control unit holds the light output of the light source at the time when an instruction for setting the target illuminance is input to the instruction input unit as a light output at the time of setting,
5. The illumination according to claim 1, further comprising: a light output excess sound generation unit that generates a predetermined light output excess sound when the light output of the light source exceeds the light output at the time of setting. apparatus.   The illumination device according to any one of claims 1 to 5, further comprising a maximum output display unit that visually notifies when the light output of the light source becomes maximum. Each time the target illuminance is set, the control unit holds the light output of the light source at the time when an instruction for setting the target illuminance is input to the instruction input unit as a light output at the time of setting,
The lighting device according to claim 1, further comprising a light output excess display unit that visually notifies when the light output of the light source exceeds the light output during setting.   The illuminating device according to claim 1, wherein the instruction input unit receives a wireless signal transmitted from outside and instructing setting of the target illuminance.   A lighting fixture comprising: the lighting device according to any one of claims 1 to 8; and a fixture main body that holds the lighting device.

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