JP4981598B2 - Lighting system - Google Patents

Description

  The present invention relates to a lighting system.

  2. Description of the Related Art Conventionally, an illumination device using a planar light emitter using an organic EL element or the like as a light source has been provided and used for display devices such as illumination, signboards, road markings, advertising lights, and the like.

Furthermore, in this kind of illuminating device, what is provided with the light distribution member which restrict | limits the emission direction of light to the specific direction inclined with respect to the direction orthogonal to the light emission surface of a planar light-emitting body is provided (for example, Patent Document 1).
JP 2001-357978 A

  Conventionally, the above illuminating device has been used for the purpose of suppressing light damage caused by light being emitted in an undesired direction and effectively using a light beam, and particularly for the purpose of obtaining some visual effect. There wasn't.

  The present invention proposes a novel method of using the above-described lighting device, and an object thereof is to provide a lighting system capable of obtaining different visual effects in a plurality of directions.

The invention of claim 1 comprises a plurality of lighting devices grouped into a plurality of lighting groups, and a control device for controlling each lighting device, each lighting device comprising a planar light emitter, possess a light distribution member for restricting the direction of light emission surface light-emitting in a different direction for each illumination group, in each illumination device, the planar light emitter is a respective elongated shape, the lighting devices, the surface The lighting groups belonging to the lighting devices adjacent to each other in the short direction of the planar light emitter are arranged in the short direction and the long direction of the planar light emitter by aligning the longitudinal direction of the planar light emitter. It is characterized by being arranged differently .

  According to the present invention, it is possible to obtain different visual effects for each corresponding illumination group in a plurality of directions corresponding to the illumination group.

The invention of claim 2 is characterized in that, in the invention of claim 1 , each lighting device can change at least one of the light output and the light color in accordance with the control of the control device.

A third aspect of the invention is characterized in that, in the first or second aspect of the invention, each lighting device is disposed on any one of a ceiling, a wall, and a floor.

  According to the present invention, each illumination device has a light distribution member that restricts the light emission direction to a different direction for each illumination group, so that the illumination groups respectively correspond in a plurality of directions corresponding to the illumination groups. Different visual effects can be obtained for each.

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

  As shown in FIG. 1, the present embodiment includes a plurality of lighting devices 1a and 1b and a control device 5 that controls each of the lighting devices 1a and 1b.

  Each of the lighting devices 1 a and 1 b includes a light emitting module 11 that uses an organic EL element as a planar light emitter as a light source, a lighting device 12 that outputs lighting power to the light emitting module 11, and the light of the light emitting module 11. And a light distribution member 13 for limiting the emission direction.

  Moreover, the control apparatus 5 inputs the light control signal which is an electric signal which instruct | indicates the electric current value of the supply current to the light emitting module 11 to the lighting device 12 of each illuminating device 1a via the signal line SL, respectively. is there. The control device 5 may output a dimming signal determined in advance for each of the lighting devices 1a and 1b, or has an operation unit that receives an operation input and responds to the operation input received by the operation unit. It may be a known light control table that outputs a light control signal. Since such a control device 5 can be realized by a well-known technique, illustration and detailed description thereof are omitted.

  More specifically, as shown in FIG. 2, the lighting device 12 is supplied with power from the DC power source E and supplies power to the light emitting module 11. The lighting device 12 steps down the output voltage of the DC power source E and emits light. The power supply part 2 supplied to the module 11 and the control part 3 which controls the power supply part 2 are provided. A terminal connected to the negative electrode of the DC power supply E is set to the same potential as the ground. As the DC power supply E, a well-known DC power supply circuit that supplies power from an AC power supply and outputs DC power of a predetermined voltage, or a battery can be used.

  The power supply unit 2 includes an input-side capacitor C1 connected between output terminals of the DC power supply E, a series circuit of a switching element Q1, an inductor L1, and an output-side capacitor C2 connected in series between both ends of the input-side capacitor. A diode D1 having an anode connected to the ground and a cathode connected to a connection point between the switching element Q1 and the inductor L1, and a drive circuit 21 for driving the switching element Q1 on and off with a duty ratio according to the control of the control unit 3; And a well-known step-down converter in which both ends of the output-side capacitor C2 are output ends.

  A control power supply unit 4 that generates a power supply voltage (hereinafter referred to as “control voltage”) Vcc of the control unit 3 is provided between the terminal connected to the DC power supply E and the power supply unit 2. . The control power supply unit 4 includes voltage dividing resistors R1 and R2 that generate a control voltage Vcc by dividing the output voltage of the DC power supply E, and a Zener diode ZD1 connected in parallel to the voltage dividing resistor R2 on the low voltage side. Become.

  The control unit 3 includes an integrated circuit 31 having eight pins from No. 1 to No. 8. In the integrated circuit 31, the control voltage Vcc is input to the first pin, the eighth pin is connected to the ground, the dimming signal is input from the control device 5 to the fifth pin, and the power supply unit 2 is input to the seventh pin. Output voltage is divided by the voltage dividing resistors R4 and R5 and inputted. An electrical signal input to the integrated circuit 31 from the 5th pin or the 7th pin is A / D converted in the integrated circuit 31. The integrated circuit 31 outputs either the H level or the L level of the output from the 2nd to 4th pins according to the dimming signal input to the 5th pin and the voltage input to the 7th pin. Switch to As such an integrated circuit 31, for example, PIC12F625 manufactured by Microchip Corporation can be used. The dimming signal is, for example, a DC voltage signal having a voltage value corresponding to an instructed current value.

  Further, the control unit 3 includes a resistor R6 connected between the negative electrode of the light emitting module 11 and the power supply unit 2 and a connection point between the light emitting module 11, a resistor R6 having one end connected, and the other end of the resistor R6 and the ground. And an operational amplifier OP1 whose inverting input terminal is connected to the connection point between the resistor R6 and the capacitor C3 via the resistor R10 and connected to the output terminal via the resistor R11, The comparator CP1 has an input terminal connected to the output terminal of the operational amplifier OP1, the output terminal of the comparator CP1 is connected to one input terminal, the fourth input terminal of the integrated circuit 31 is connected to the other input terminal, and the output terminal An AND gate AND connected to the drive circuit 21 is provided. That is, the output voltage of the operational amplifier OP1 decreases as the charging voltage of the capacitor C3 connected to the inverting input terminal via the resistor R10 increases, and increases as the charging voltage of the capacitor C5 connected to the non-inverting input terminal increases. . The non-inverting input terminal of the operational amplifier OP1 is connected to the ground via the capacitor C5 and is connected to the third pin of the integrated circuit 31 via the resistor R12. Further, the negative input terminal of the comparator CP1 is connected to the one end of the parallel circuit of the capacitor C4 and the switching element Q8, one end of which is connected to the control voltage Vcc via the resistor R14 and the other end is connected to the ground. Yes. The switching element Q8 connected between the inverting input terminal of the comparator CP1 and the ground is driven on and off by the output from the second pin of the integrated circuit 31. Note that the operational amplifier OP1 and the comparator CP1 that are made into one chip are available on the market at a low cost.

  The operation of this embodiment will be described. The integrated circuit 31 periodically turns on the switching element Q8 for a short period of time as shown in FIG. The capacitor C4 is charged while the switching element Q8 is turned off and discharged during the period when the switching element Q8 is turned on, so that the waveform of the voltage input to the negative input terminal of the comparator CP1 is As shown in FIG. 3B, the waveform is a waveform in which a gradual increase during charging and a rapid decrease during discharging are alternately repeated. That is, when the input voltage to the positive input terminal of the comparator CP1 is constant as shown in FIG. 3C, the output voltage of the comparator CP1 is applied to the positive input terminal as shown in FIG. It becomes a rectangular wave in which the duty ratio increases as the input voltage increases. During the period in which the light emitting module 11 is continuously lit, the output of the 4th pin of the integrated circuit 31 is maintained at the H level, so that the output of the comparator CP1 is directly input to the drive circuit 21 from the AND gate AND. The drive circuit 21 increases the on / off duty ratio of the switching element Q1 to increase the output voltage of the power supply unit 2 as the duty ratio of the input rectangular wave increases, that is, increases the amount of current supplied to the light emitting module 11. .

  Here, the input voltage to the positive input terminal of the comparator CP1 is the output voltage of the operational amplifier OP1. As described above, this is the voltage of the capacitor C3 connected to the inverting input terminal of the operational amplifier OP1 through the resistor R10. The lower the charging voltage, the higher the charging voltage of the capacitor C5 connected to the non-inverting input terminal of the operational amplifier OP1. The charging voltage of the former capacitor C3 increases as the current supplied to the light emitting module 11 increases, and the charging voltage of the latter capacitor C5 increases as the duty ratio of the output from the third pin of the integrated circuit 31 increases. That is, the greater the current supplied to the light emitting module 11 with respect to the duty ratio of the output from the third pin of the integrated circuit 31, the lower the input voltage to the comparator CP1, and the output of the output from the comparator CP1 to the drive circuit 21. As the duty ratio decreases, the current supplied to the light emitting module 11 decreases. That is, feedback control is performed so that the current value supplied to the light emitting module 11 is a constant value corresponding to the duty ratio of the output from the third pin of the integrated circuit 31. The integrated circuit 31 controls the duty ratio of the output from the 3rd pin according to the dimming signal input to the 5th pin.

  Further, the integrated circuit 31 detects a no-load state or a short circuit in the light emitting module 11 based on the input voltage to the 7th pin. When a no-load state or a short circuit is detected, for example, the drive circuit 21 is stopped by setting the output of the 4th pin to L level.

  Next, the light distribution member 13 will be described. As shown in FIG. 4, each of the light distribution members 13 is made of a transparent material and has a cross section of a right triangle. One of the surfaces forming a right angle in the cross section faces the light emitting surface of the light emitting module 11 and the direction of the oblique side A plurality of prisms 13a arranged side by side and the other of the surfaces forming a right angle in the cross section, the light of the light emitting module 11 is reflected on one surface on the prism 13a side and the light emitting module 11 is reflected on the other surface. A light distribution film 13b that absorbs light. That is, the light of the light emitting module 11 is mainly emitted in the left direction in FIG. 4 and is not emitted in the right direction in FIG. As a material of the prism 13a, for example, a synthetic resin such as an acrylic resin can be used. The light distribution film 13b is formed by, for example, forming an aluminum layer that reflects light by, for example, vapor deposition, and providing, for example, a black paint layer that absorbs light on the aluminum layer by, for example, coating. Can do.

  Here, the illumination devices 1a and 1b are divided into two illumination groups, and the direction of light distribution by the light distribution member 13 is common to each illumination group. Further, as shown in FIG. 5, the light emitting modules 11 of the respective lighting devices 1a and 1b are each in the shape of an elongated rectangle, and the respective lighting devices 1a and 1b are arranged in the longitudinal direction of the light emitting module 11 (up and down in FIG. 5). Direction (hereinafter simply referred to as “longitudinal direction”), and one side of the light emitting module 11 in the short direction (left and right direction in FIGS. 1 and 5; hereinafter simply referred to as “short direction”). Lighting devices 1a belonging to a lighting group (hereinafter referred to as “group A”) and lighting devices 1b belonging to the other lighting group (hereinafter referred to as “group B”) are arranged alternately. . Further, the direction of light distribution by the light distribution member 13 is a direction inclined in the short direction with respect to the direction orthogonal to the light emitting surface of the light emitting module 11, and the directions of inclination are indicated by arrows La and Lb in FIG. In this way, it is different for each lighting group.

  According to the above configuration, the person Ma viewed from one side in the short direction that is the direction corresponding to the group A and the person Mb viewed from the other side in the short direction that is the direction corresponding to the group B are mutually Since the illumination devices 1a and 1b of different illumination groups can be seen, different visual effects can be obtained depending on the viewing direction.

  For example, the present embodiment is arranged near the entrance of a store or on the ceiling or floor or wall near the window, with one of the short sides of the lighting devices 1a and 1b facing the inside of the store and the other of the short sides facing the outside of the store. In the case of arrangement, it is possible to make the light facing the outside of the store a conspicuous color, while setting the light facing the inside of the store to a calm color.

  Alternatively, when the present embodiment is arranged on the ceiling or floor of the passage with the short direction of the lighting devices 1a and 1b facing the extension direction of the passage, the book can be viewed from either side of the extension direction of the passage. It can be seen that the right side of the embodiment emits blue light and the left side emits red light, which can also guide to right-hand traffic. For example, four lighting devices 1a and 1b are arranged side by side in the longitudinal direction, the two lighting devices 1a and 1b on one side in the longitudinal direction on the right side are blue, and the two lighting devices 1a and 1b on the other side are Red. Further, the light emitting module 11 capable of switching the light color between red and blue by the supplied power is used for the two lighting devices 1a and 1b in the central portion in the longitudinal direction, and the light colors of the lighting devices 1a and 1b are controlled. Thus, the width of the range that emits blue light when viewed from one side in the short direction and the red light when viewed from the other side in the short direction and the red light that is viewed from one side in the short direction The ratio of the width of the range that emits blue light when viewed from the other side of the direction may be flexibly switched according to the time zone or the like in three ways of 1: 3, 1: 1, and 3: 1. Thus, when controlling a light color according to a time slot | zone, the control apparatus 5 shall have a time measuring part which time-measures time, for example, and shall output the light control signal according to the time time-measured by the time measuring part. Since the light emitting module 11 having a variable light color as described above can be realized by a known technique, a detailed description thereof is omitted.

It is explanatory drawing which shows embodiment of this invention. It is a circuit diagram which shows a lighting device same as the above. (A)-(d) is explanatory drawing which shows operation | movement of the lighting device same as the above, respectively, (a) shows the ON / OFF state of a switching element, (b) shows the input voltage to the negative input terminal of a comparator. (C) shows the input voltage to the positive input terminal of the comparator, and (d) shows the output voltage of the comparator. It is explanatory drawing which shows the structure of a light distribution member same as the above. It is explanatory drawing which shows the arrangement | sequence of an illuminating device same as the above.

Explanation of symbols

1a, 1b Illuminating device 11 Light emitting module 13 Light distribution member 5 Control device

Claims (3)

A plurality of lighting devices grouped into a plurality of lighting groups, and a control device for controlling each lighting device,
The lighting devices are each possess a surface light emitter, and a light distribution member for restricting the direction of light emission surface light-emitting in a different direction for each illumination groups,
In each lighting device, each of the planar light emitters has an elongated shape,
Each of the lighting devices is aligned in the longitudinal direction of the planar light emitter, arranged in a plurality in the short direction and the longitudinal direction of the planar light emitter, and adjacent to each other in the short direction of the planar light emitter The lighting system is characterized in that the lighting groups belonging to each other are arranged differently . The lighting system according to claim 1, wherein each lighting device can change at least one of a light output and a light color according to control of the control device . 3. The lighting system according to claim 1, wherein each lighting device is disposed on any one of a ceiling, a wall, and a floor .

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