JP2019055727A - Luminaire - Google Patents

Abstract

To provide luminaire capable of showing properly a light effect, which is viewed as if light flows smoothly by few optical sources.SOLUTION: Luminaire includes a long first transparent material 10A and a second transparent material 10B arranged mutually in series in a longer direction, a first light source 20A for irradiating light to one end face of the first transparent material 10A, a second light source 20B for irradiating light to one end face of the second transparent material 10B, and a control device for performing lighting control of the first light source 20A and the second light source 20B.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a lighting device having a light guide.

  2. Description of the Related Art In recent years, a vehicular illumination device has a large number of light sources arranged in a cover as a turn lamp or a vehicle interior illumination. By performing the control to turn off the light, there has been proposed a lighting effect that makes the light appear to flow linearly or in a strip shape in one direction (see, for example, Patent Documents 1 and 2).

In this case, in order to determine the lighting timing for each light source, a control unit having an electronic circuit and a control program in addition to a large number of light sources is required. In addition, if the distance of movement of the light is increased, the number of necessary light sources increases and the wiring and electronic system become complicated. For these reasons, the illuminating device having the above-described illumination effect is expensive.
In Patent Document 3, light sources are arranged at both ends of a long light guide member, and the timing of turning on and off one light source and the other light source is shifted so that a small number of light sources can be used from one end of the light guide member. A proposal has been made to make light appear to flow to the other end (see FIG. 5 of Patent Document 3).

JP 2012-96564 A JP 2012-17063 A Japanese Patent No. 6091096

  The technique described in FIG. 5 of Patent Document 3 is an illumination in which light appears to flow from one end of the light guide member to the other end by combining all the lights of one light source and the other light source and turning off. It is intended to produce an effect. Therefore, as a result of the light emitting state of the light guide member changing step by step with time, even if the portion of the light guide member that appears bright moves from one end to the other end, it becomes a stepwise movement and smooth movement of light May not be expressed as

Patent Document 3 further emphasizes the gradation of light by performing dimming control of one and the other light source by dimming control means such as phase control dimming system or PWM dimming system, and flows smoothly. There is also a description that light can be clearly seen (see paragraphs [0074] to [0076] of Patent Document 3). However, there is no specific description about the lighting conditions of the light source in that case.
Further, since the vicinity of the center portion of the long light guide member is far from the light sources arranged at both ends of the light guide member, the brightness may be insufficient near the center portion of the light guide member.
Furthermore, in the case where the lighting device described in Patent Literature 3 is used to produce an effect in which light seems to flow over a separable member, it is necessary to install the above-described lighting device for each member. There is a problem that the effect of reducing the number of light sources to be used is diminished.

  Therefore, an object of the present invention is to provide an illumination device that can suitably exhibit an illumination effect that allows light to flow smoothly with a small number of light sources.

As a result of intensive studies in order to solve the problems, the present inventors have arrived at each aspect of the present invention as follows.
That is, the lighting device according to the first aspect of the present invention is a long first light guide and a second light guide, and is a first light guide arranged in series in the longitudinal direction thereof. A first light source that irradiates light to the first end face of the first light guide on the side farther from the second light guide, the first light source, and the first light guide A second light source that irradiates light to the first end face of the second light guide on the side, and a control device that performs lighting control including control of lighting of the first light source and the second light source, In the lighting control, following the first increase control for increasing the luminance of the first light source from 0 to the first set luminance and the first increase control, the luminance of the first light source is maintained at the first set luminance. Including a first maintenance control to be performed and a first reduction control for reducing the brightness of the first light source from the first set brightness to 0 following the first maintenance control. Following the second increase control for increasing the brightness of the second light source from 0 to the second set brightness and the second increase control, the brightness of the second light source is maintained at the second set brightness. A second maintenance control, and a second reduction control for reducing the brightness of the second light source from the second set brightness to 0 following the second maintenance control, wherein the control device performs the first increase control. The time point at which the luminance of the first light source starts to increase from 0 is defined as the first increase start time point, and the time point at which the luminance of the second light source starts to increase from 0 by the second increase control is defined as the second increase start time point. Then, the first increase start time is earlier than the second increase start time, and the control device finishes increasing the luminance of the first light source to the first set luminance by the first increase control. At the end of the increase of the second light source, the second increase of the brightness of the second light source by the second increase control Assuming that the time point when the increase to the constant luminance is completed is the second increase end point, the first increase end point is ahead of the second increase end point, and the control device controls the first light source by the first decrease control. The time when the luminance starts to decrease from the first set luminance is set as the first decrease start time, and the time when the luminance of the second light source starts to decrease from the second set luminance by the second decrease control is set as the second decrease start. As the time point, the first decrease start time is the same as the second decrease start time, and the time from the first increase start time to the second increase end time is 0.2 seconds or less.

According to the lighting control described above, light smoothly flows from the first end face side of the first light guide toward the second end face side opposite to the first end face of the second light guide body. The lighting effect that looks like this can be suitably achieved. In particular, by setting the time from the first increase start time to the second increase end time to 0.2 seconds or less, the brightness of the light guide is raised within a suitable time range, as described above. An illumination effect that allows light to flow smoothly can be suitably achieved.
The lighting device according to the above aspect uses a combination of the first light source and the first light guide, and a combination of the second light source and the second light guide, and the second light source is the first light source. An arrangement is employed in which light is applied to the first end face of the second light guide near the one light guide. Therefore, it is possible to avoid the problem that the brightness is insufficient near the center of the light guide, which may occur in the configuration in which the light sources are arranged at both ends of the long light guide. In addition, a combination of the first light source and the first light guide is installed on one of the two separable members, and a combination of the second light source and the second light guide is installed on the other member. For example, with a small number of light sources, it is possible to produce an effect in which light appears to flow from the first light guide to the second light guide.

According to the second aspect of the present invention, in the lighting device, the second increase start time is the same as the first increase end time or earlier than the first increase end time.
According to the third aspect of the present invention, in the illumination device, the time point when the control device finishes reducing the luminance of the first light source to 0 by the first reduction control is defined as the first reduction end time, Assuming that the second reduction end time is a time point at which the brightness of the second light source is reduced to 0 by the reduction control of 2, the first reduction end time is the same as the second reduction end time or the second reduction end time. Be ahead of time.
According to such a configuration, a lighting effect that makes it seem that light smoothly flows from the first end face side of the first light guide body toward the second end face side of the second light guide body is more preferable. Can play.

According to the fourth aspect of the present invention, in the lighting device, the time from the first increase start time to the second decrease end time is in the range of 0.25 seconds to 1 second.
According to the fifth aspect of the present invention, in the lighting device, the time from the second decrease start time to the second decrease end time is 0.5 second or less.
According to these configurations, the illumination effect that allows the light to flow smoothly from the first end face side of the first light guide to the second end face side of the second light guide is more suitably achieved. be able to.

According to the sixth aspect of the present invention, in the lighting device, the time from the second increase end time to the second decrease start time is 0.05 seconds or more.
According to such a configuration, it is possible to maintain a certain time or more for maintaining the first light source at the first set luminance and maintaining the second light source at the second set luminance.

According to the seventh aspect of the present invention, in the illumination device, the control device increases the luminance of the first light source exponentially with respect to time by the first increase control.
According to the eighth aspect of the present invention, in the illumination device, the control device increases the luminance of the second light source exponentially with respect to time by the second increase control.
According to these configurations, light flows linearly over time from the first end face side of the first light guide toward the second end face side of the second light guide (that is, approximately A lighting effect that appears to flow at a constant speed can be achieved.

According to the ninth aspect of the present invention, in the lighting device, the third light source that irradiates light to the second end surface of the second light guide that is far from the first light guide. Further, the lighting control further includes lighting control of the third light source, and the lighting control includes a third increase control for increasing the luminance of the third light source from 0 to a third set luminance, and a third increase. Subsequent to the control, the third maintenance control for maintaining the brightness of the third light source at the third set brightness, and the brightness of the third light source is reduced from the third set brightness to 0 following the third maintenance control. And when the control device starts to increase the luminance of the third light source from 0 by the third increase control is defined as a third increase start time, the second increase start time is Prior to the third increase start time, the control device controls the luminance of the third light source by the third increase control. Assuming that the end point of the increase to the set brightness is the third increase end point, the second increase end point is the same as the third increase end point or earlier than the third increase end point. Assuming that the time point at which the luminance of the third light source starts to decrease from the third set luminance by the third reduction control is the third reduction start time, the second reduction start time is the same as the third reduction start time. The time from the first increase start time to the third increase end time is 0.2 seconds or less.
According to such a configuration, a lighting effect that makes it seem that light smoothly flows from the first end face side of the first light guide body toward the second end face side of the second light guide body is more preferable. Can play.

The lighting device lighting control method according to the tenth aspect of the present invention is a long first light guide and a second light guide, which are arranged in series in the longitudinal direction thereof. A first light source that irradiates light to a first end surface of the first light guide on the side far from the second light guide, a first light guide, and a first light guide. A lighting control method for an illuminating device comprising: a second light source that irradiates light to a first end face of a second light guide near the light body, wherein the luminance of the first light source is changed from 0 to Following the first increase step for increasing to the set luminance of 1, the first maintaining step for maintaining the luminance of the first light source at the first set luminance, and the first maintaining step following the first increasing step. Subsequently, a first reduction step for reducing the luminance of the first light source from the first set luminance to zero, and the luminance of the second light source from zero to the first luminance. Following the second increase step for increasing the set brightness to the set brightness, the second maintain step for maintaining the brightness of the second light source at the second set brightness, and the second maintain step. A second reduction step of reducing the brightness of the second light source from the second set brightness to 0, and the first increase step starts at a time when the brightness of the first light source starts to increase from 0. If the second increase step is the second increase start time when the second increase step starts increasing the luminance of the second light source from 0, the first increase start time is higher than the second increase start time. The time point when the first increase step finishes increasing the luminance of the first light source to the first set luminance is defined as the first increase end point, and the second increase step sets the luminance of the second light source as the first luminance value. The time when the increase to the set brightness of 2 is finished , The first increase end time is ahead of the second increase end time, and the first decrease step is a time when the first light source starts to decrease the luminance of the first light source from the first set luminance. Assuming that the first decrease start time is the first decrease start time, and the second decrease start time is the time when the second decrease step starts to decrease the luminance of the second light source from the second set luminance, the first decrease start time is the second decrease start time. The time from the first increase start time to the second increase end time is 0.2 seconds or less.
According to this method, the same effect as in the first aspect of the present invention can be obtained.

FIG. 1 is a schematic front view for explaining the configuration of the illumination apparatus according to the first embodiment of the present invention. FIG. 2 is a schematic block diagram of an electric circuit configuration of the lighting apparatus of FIG. FIG. 3 is a diagram for explaining lighting control of the illumination device of FIG. FIG. 4 is a diagram for explaining an example of a change over time in the light emission mode of the illumination device of FIG. 1. FIG. 5 is a diagram for explaining lighting control according to a modification of the first embodiment. FIG. 6 is a schematic view showing a rear portion of a vehicle including a turn lamp according to the second embodiment of the present invention. FIG. 7 is a schematic view for explaining the configuration of the turn lamp according to the second embodiment. FIG. 8 is a schematic front view for explaining the configuration of the illumination device according to the third embodiment of the present invention. FIG. 9 is a schematic block diagram of an electric circuit configuration of the illumination device of FIG. FIG. 10 is a diagram for explaining lighting control according to the third embodiment. FIG. 11 is a schematic diagram for explaining a configuration of a turn lamp according to a fourth embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, lighting devices according to a plurality of embodiments embodying the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a schematic front view for explaining the configuration of the illumination device 1 according to the first embodiment of the present invention. FIG. 2 is a schematic block diagram of an electric circuit configuration of the lighting device 1. As shown in FIGS. 1 and 2, the lighting device 1 includes a long first light guide 10A and a long second light guide 10B, which are arranged in series in the longitudinal direction. . The illuminating device 1 further includes a first light source 20A provided on one end face 11A side in the longitudinal direction of the first light guide 10A far from the second light guide 10B, and the first light guide 10A. And a second light source 20B provided on the one end face 11B side in the longitudinal direction of the second light guide on the side close to. The illumination device 1 further includes a control unit 30 that performs lighting control of the first and second light sources 20A and 20B.

(Light guide)
The first and second light guides 10A and 10B are made of transparent flexible resin material such as fluororesin, polymethyl methacrylate resin (PMMA resin), polycarbonate resin (PC resin), cyclic polyolefin resin (COP resin), It consists of a transparent flexible material or a rigid material such as a transparent rigid resin material such as an acrylic resin, or a transparent glass material.

  The first and second light guides 10A and 10B illustrated in FIG. 1 may be formed as columnar members having a circular cross section, but the cross sections of the first and second light guides 10A and 10B. The shape is not limited to a circle but may be an ellipse or a polygon. The first and second light guides 10 </ b> A and 10 </ b> B are not limited to columnar ones as long as they are long members, and the cross-sectional area and shape may change in the longitudinal direction. 1st and 2nd light guide 10A, 10B may be bent in the middle of the longitudinal direction. The first and second light guides 10A and 10B may be arranged along any of a straight line, a bent line, and a curved line. As shown in FIG. 1, the other end of the first light guide 10A (a portion near the other end face 12A opposite to the one end face 11A) and one end of the second light guide 10B (one end face) And a second light source 20B is disposed between them.

  One end surface 11A of the first light guide 10A functions as an incident surface on which light from the first light source 20A is incident. In addition, one end surface 11B of the second light guide 10B functions as an incident surface on which light from the second light source 20B is incident. The light incident on the inside of the first light guide 10A from one end surface 11A of the first light guide 10A is repeatedly reflected on the peripheral surface 13A of the first light guide 10A, and the first light guide Proceed through 10A. In the middle of traveling inside the first light guide 10A, light leaks little by little from the peripheral surface 13A when a part of the light exceeds the critical angle. For this reason, 13 A of surrounding surfaces function as a light-projection surface which leaks light from the whole. Similarly, the peripheral surface 13B of the second light guide 10B functions as a light emitting surface through which light from the second light source 20B leaks from the entirety.

  1st and 2nd light guide 10A, 10B may be made to leak light by some processes etc., and the light-diffusion material may be contained. In this case, light diffuses in multiple directions inside the first and second light guides 10A and 10B and easily hits the peripheral surfaces 13A and 13B, so that light is likely to leak. The light diffusing material only needs to have a property of diffusing or reflecting light, and as the light diffusing material, for example, a conventional general material such as titanium oxide can be used.

(light source)
The first light source 20A has an LED 21A, and the second light source 20B has an LED 21B. Instead of the LEDs 21 </ b> A and 21 </ b> B, a known light source such as an EL (Electro Luminescence) element, an incandescent bulb, a halogen bulb, or a cold cathode tube can be employed. The light emitted from the first and second light sources 20A and 20B may have any color. As shown in FIG. 2, the first and second light sources 20A and 20B are electrically connected to a control unit 30 including a control circuit.

(Control part)
In addition to controlling the brightness of the first and second light sources 20A and 20B to be constant, the control unit 30 adjusts supply power, or a phase control dimming method or PWM (Pulse Width Modulation) In a mode in which the luminance of each of the first and second light sources 20A and 20B is continuously changed over time by a known dimming control means such as a PWM dimming method that repeatedly turns on and off based on a signal. Can be controlled.

(Lighting control)
Next, an example of lighting control of the lighting device 1 performed by the control unit 30 according to the present embodiment will be described based on FIGS. 3 and 4 in addition to FIGS. (A) in FIG. 3 the control mode of the luminance I _A of the first light source 20A of the lighting device 1 is an explanatory diagram showing the abscissa the time t. (B) in FIG. 3 the control mode of the luminance I _B of the second light source 20B of the illumination apparatus 1 is an explanatory diagram showing the abscissa the time t. FIG. 4 is an explanatory view schematically showing an example of a change in the light emission mode over time of the lighting device 1 by the lighting control of FIG. The light emission aspect of the illuminating device 1 in the time ag of FIG. 3 is each typically shown to (a)-(g) of FIG.

Lighting control control unit 30 performs the first light source 20A is, as shown in (A) of FIG. 3, gradually increases the luminance I _A of the first light source 20A from 0 to a first set luminance I ₁ a first increase control, following the first increase control, the first maintenance control that maintains the luminance I _a of the first light source 20A in the first set luminance I _1, following the first maintenance control, including first and decreasing control for gradually decreasing the luminance I _a from the first set luminance I ₁ to 0 of the first light source 20A, a. As a result, the amount of light emitted from the first light source 20A to the one end surface 11A of the first light guide 10A gradually increases by the first increase control, becomes constant by the first maintenance control, Decrease gradually by decreasing control.

The control unit 30 is a lighting control carried out for the second light source 20B is, as shown in FIG. 3 (B), slowly luminance _{I B} of the second light source 20B from 0 to the second set luminance _{I 2} a second increasing control for increasing, subsequently to the second increase control, the luminance I _B of the second light source 20B and a second maintenance control for maintaining the second set luminance I _2, the second sustain control subsequently, comprising a second reduction control gradually decreases the luminance I _B from the second set luminance I ₂ 0 of the second light source 20B, a. As a result, the amount of light emitted from the second light source 20B to the one end surface 11B of the second light guide 10B gradually increases by the second increase control, becomes constant by the second maintenance control, Decrease gradually by decreasing control.

Further, as shown in FIG. 3, the time when the control unit 30 begins to increase the intensity I _A of the first light source 20A by a first increase control from 0 to the first increase start point t1a, the second increase control by the time point to start increasing the luminance I _B of the second light source 20B from 0 to the second increase start time t1b, the first increase start time t1a is earlier than the second increase start time t1b.
Further, the time when the control unit 30 finishes increases the luminance I _A of the first light source 20A to the first set luminance I ₁ by a first increment control the first increase end t2a, the second increase control When the time at which the luminance I _B of the second light source 20B finishes increased to a second set luminance I ₂ and a second increased end t2b, first increasing end t2a is than the second increased end t2b It ’s the destination.
The second increase start time t1b is earlier than or at the same time as the first increase end time t2a.

Further, the time when the control unit 30 starts decreasing the luminance I _A of the first light source 20A from the first set luminance I ₁ by a first reduction control and the first decrease start time t3a, the second reduction control When the time to start decreasing the luminance I _B of the second light source 20B from the second set luminance I ₂ and a second decrease start time t3b, the first decrease start time t3a simultaneous and second decrease start time t3b It is.
Furthermore, the time from the first increase start time t1a to the second increase end time t2b is 0.2 seconds or less.

According to the lighting control of the lighting device 1 described above, in the initial state, as shown in the time point t1a in FIG. 3 (that is, the time point a) and in FIG. 4A, the first and second light sources 20A, 20B is turned off, and the first and second light guides 10A and 10B are all turned off.
Thereafter, the luminance I _A of the first light source 20A starts to increase by the first increase control. For example, the second incremental start time t1b (point b), only the first light source 20A is turned on at a certain luminance, the second light source 20B are luminance _{I B} is zero. Therefore, as shown in FIG. 4B, the first light guide 10A is somewhat bright on one end side and gradually darkens toward the other end side, and the second light guide 10B is dark overall. As visible.

In subsequent first increased end t2a (point c), has a higher first set luminance _{I 1} than the luminance _{I A} is the time b of the first light source 20A, the brightness I of the second light source 20B _{Since B} has also increased to some extent, as shown in FIG. 4C, the first light guide body 10A is bright as a whole, or bright as a whole and is visually recognized as being slightly dark only in the vicinity of the other end. Then, the second light guide body 10B is visually recognized as being somewhat bright on one end side and gradually darkening on the other end side. At this time, when compared with the light emission mode of the first light guide 10A at the time point b shown in FIG. 4B, the brighter portion of the first light guide 10A is directed from one end side to the other end side. It can be seen that it is more extended. Increasing rate of the luminance I _A of the first light source 20A in a first increasing control, and, the rate of increase of the luminance I _B of the second light source 20B in the second increase control until the first increase end t2a is The other end side of the first light guide 10A is always set so as to be viewed brighter than the one end side of the second light guide 10B.

Thereafter, at the second increase end time t2b, in addition to the first light guide 10A, the second light guide 10B is also bright as a whole, or bright overall and slightly dark only in the vicinity of the other end. As visible. Since the first light source 20A and the second light source 20B are maintained at the first and second set luminances I ₁ and I ₂ after the second increase end time t2b, respectively, as shown in FIG. As described above, the first and second light guides 10A and 10B appear to be bright as a whole or almost as a whole. The first and second set luminances I ₁ and I ₂ may be set so that the first and second light guides 10A and 10B appear to have similar brightness, but are not limited thereto.

After the first decrease start time t3a and the second decrease start time t3b thereafter, the luminances I _A and I _{B of} the first light source 20A and the second light source 20B are obtained by the first decrease control and the second decrease control. Gradually decreases. Incidentally, the rate of decrease in intensity I _B of reduction speed and the second light source 20B of the luminance I _A of the first light source 20A at this time, up to the second reduced end t4b, always first light guide body The other end side of 10A is set so as to be visually recognized darker than the one end side of the second light guide 10B. Therefore, at the time point e after the second decrease start time point t3b, the one end side of the second light guide body 10B is brighter than the other end side of the first light guide body 10A, and the second light guide body 10B It is visually recognized as gradually darkening as it goes to the other end side. Furthermore, the first reduction end t4a in (point f) the luminance _{I A} of the first light source 20A 0, and therefore the first light guide member 10 is generally darker, the brightness _{I B} of the second light source 20B Is not yet 0, it is visually recognized that one end side of the second light guide 10B is slightly brighter and gradually becomes darker toward the other end side.

At the second decrease end time t4b (that is, time point g), the first and second light sources 20A and 20B are turned off, and the first and second light guides 10A and 10B are all turned off.
In the present embodiment, the first decrease end time t4a is earlier than the second decrease end time t4b, but may be simultaneous. The rate of decrease in intensity I _B of the first reduction control and the second first light source 20A for luminance I _A decreasing rate and the second light source 20B of the reduction control, the other end of the first light guide member 10A And you may set so that the one end side of the 2nd light guide 10B may always be seen to the same brightness. The first reduction control and the second reduction control may be such that the luminances I _A and I _B of the first and second light sources 20A and 20B are simultaneously and instantaneously set to zero.

Due to the lighting control of the first and second light sources 20A and 20B as described above, as shown in FIG. 4, a portion that appears relatively bright among the first and second light guides 10A and 10B is the first guide. The light moves from the one end side of the light body 10A to the other end side of the second light guide body 10B with the passage of time, and light travels from one end side of the first light guide body 10A to the other end side of the second light guide body 10B. It is possible to achieve an illumination effect that smoothly flows to the outside. In particular, as described above, since the time from the first increase start time t1a to the second increase end time t2b is set to 0.2 seconds or less, it is possible to produce an effect in which light appears to flow more smoothly.
The above-described control may be repeated. In that case, by starting the first increase control of the next lighting control at the second decrease end time t4b that is the end time of the second decrease control, The lighting control may be performed sequentially and continuously. Further, a turn-off time of 0.2 to 0.6 seconds may be inserted between the second decrease end time t4b and the start of the first increase control of the next turn-on control.

(Modification)
It is considered that the light emitted from the first light source 20A attenuates exponentially with respect to the traveling distance inside the first light guide 10A as it travels inside the first light guide 10A. The same applies to the second light source 20B and the second light guide 10B. Accordingly, in a first increasing control of the lighting control of the lighting device 1 of the first embodiment described above, as shown in FIG. 5 (A), the luminance I _A of the first light source 20A with respect to time t It may be increased exponentially. Similarly, in the second increasing control, as shown in FIG. 5 (B) may be those that increase exponentially with respect to the luminance I _B of the second light source 20B time t. Thereby, light flows linearly with respect to the passage of time t from one end side of the first light guide 10A toward the other end side of the second light guide 10B (that is, flows at a substantially constant speed). It is possible to produce an effect that looks like this. The same can be said for the reduction control.

(Second Embodiment)
Next, the example which applied the illuminating device 1 of this invention to the turn lamp of vehicles, such as a motor vehicle, is demonstrated with reference to FIG. 6 and FIG. The turn lamp is attached to a front left and right position, a rear left and right position, or other position of a vehicle such as an automobile, and displays a change in the traveling direction of the vehicle by lighting. In the present embodiment, the control unit 30 may be an ECU (Electronic Control Unit) for controlling the operation of various electrical components of the vehicle, and performs lighting control of the lighting device 1 based on the operation of the occupant. It may be configured.

  FIG. 6 is a diagram illustrating a vehicle 100 having a rear combination lamp 50 mounted on the rear right side of the vehicle body as an example of a vehicle lamp unit including the lighting device 1 as a turn lamp according to the present embodiment. It is the schematic which looked at the motor vehicle 100 from the back side. 6A shows a state where the trunk chamber lid 101 of the automobile 100 is closed, and FIG. 6B shows a state where the trunk chamber lid 101 is opened. FIG. 7 is a view showing only the right rear combination lamp 50 taken out.

  As shown in the figure, the right rear combination lamp 50 includes two parts, a first part 50A disposed on the rear surface of the trunk chamber lid 101 and a second part 50B disposed on the rear surface of the body 102 of the automobile 100. Become. The first portion 50A includes a first light guide 10A, a first light source 20A, lamps 511 and 512 (for example, any one of a tail lamp, a brake lamp, a lamp that also serves as a lamp, and a back lamp), and an inner side of the vehicle body. And a resin cover (not shown) which is fitted to the outer peripheral edge of the first casing 52A and becomes the front side of the first portion 50A. The second portion 50B includes a second light guide body 10B, a second light source 20B, a lamp body 513 (for example, any one of a brake lamp, a back lamp, and a position lamp), and a second portion facing the inside of the vehicle body. A casing 52B and a resin cover (not shown) fitted to the outer peripheral edge of the second casing 52B and serving as the front side of the second portion 50B are provided. The first and second light guides 10A and 10B, the first and second light sources 20A and 20B, and the control unit 30 shown in FIG.

The first and second casings 52A and 52B are made of a resin material such as polypropylene (PP) and acrylonitrile-butadiene-styrene copolymer resin (ABS). The lighting states of the first and second light guides 10A and 10B and the lamps 511 to 513 are visible from the outside through a resin cover.
As shown in FIG. 6A, when the trunk chamber lid 101 is in a closed state, the first portion 50A and the second portion 50B are adjacent to each other, and the first light guide 10A and the second light guide 10B are adjacent to each other. The optical body 10B is arranged in series, and the other end of the first light guide 10A and one end of the second light guide 10B are close to each other.

When the vehicle body is viewed from the rear, one end of the first light guide 10A of the lighting device 1 (the end portion on the one end surface 11A side in FIG. 7) is disposed on the center side of the vehicle body in the horizontal direction, and the second guide The other end of the light body 10B (the end on the other end surface 12B side opposite to the one end surface 11B in FIG. 7) is disposed on the outer edge side of the vehicle body in the horizontal direction. That is, when the vehicle body is viewed from the rear, the other end of the second light guide 10B is positioned on the right side of the first light guide 10A. Therefore, when the lighting control of the lighting device 1 described with reference to FIGS. 3, 4, or 5 is performed, the second light guide from the left end of the first light guide 10 </ b> A when viewed from the rear of the vehicle body. The light will appear to flow toward the right end of 10B. With such an illumination mode, when the right turn lamp (illumination device 1) is turned on, the light is directed in the longitudinal direction of the first and second light guides 10A and 10B toward the right side, which is the direction of changing the course of the automobile. It is possible to produce an effect that flows along the road, and it is possible to more clearly inform the external observer of the direction of the course change of the car.
A reflector is disposed between the first light guide 10A and the first casing 52A, and between the second light guide 10B and the second casing 52B, and the first and second light guides 10A and 10B. You may improve the visibility of a lighting state.
The second light guide 10B may wrap around to the side surface of the vehicle body.

When the lighting device 1 of the present invention is used as a turn lamp for an automobile as in this embodiment, the length from one end of the first light guide 10A to the other end of the second light guide 10B is about 200 mm to 500 mm. It can be illustrated that it is within the range. In addition, the emission color of the first and second light sources 20A and 20B and the first and second light guides 10A and 10B can be exemplified as amber.
In the lighting control described above, it is preferable that the time from the first increase start time t1a to the second decrease end time t4b is in the range of 0.25 seconds to 1 second. Moreover, it is preferable that the time from the second decrease start time t3b to the second decrease end time t4b be 0.5 seconds or less. This is because an illumination effect in which light appears to flow smoothly from one end side of the first light guide body 10A toward the other end side of the second light guide body 10B can be more suitably achieved.
Moreover, it is preferable that the time from the second increase end time t2b to the second decrease start time t3b be 0.05 seconds or more. This is to ensure sufficient time for maintaining the first and second light sources 20A and 20B at the first and second set luminances I ₁ and I ₂ , respectively.

The rear combination lamp 50 shown in FIG. 7 and a left-right symmetric rear combination lamp may be arranged on the rear left side of the vehicle body as shown in FIG. When the lighting control of the lighting device 1 described with reference to FIGS. 3, 4 or 5 is performed for the left rear combination lamp, when viewed from the rear of the vehicle body, the first light guide 10A is The illumination effect that the light seems to flow toward the left end of the second light guide 10B is obtained. The lighting device 1 according to the present invention may be used as a turn lamp on both the left and right sides of the front of the vehicle body to perform similar lighting control.
When the lighting device 1 as a turn lamp is turned on as a hazard lamp, the lighting control shown in FIG. 3, 4 or 5 may be performed.
Regardless of the open / closed state of the trunk chamber lid 101, the lighting control shown in FIG.

(Third embodiment)
Next, an illuminating device 1 ′ according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a schematic front view for explaining the configuration of the illumination device 1 ′ according to the third embodiment of the present invention. As shown in FIG. 8, the illuminating device 1 ′ according to the present embodiment corresponds to the illuminating device 1 according to the first embodiment shown in FIG. 1 further including a third light source 20C. The third light source 20C is disposed on the other end surface 12B side of the second light guide 10B, and irradiates the other end surface 12B of the second light guide 10B with light. That is, the other end surface 12B of the second light guide 10B functions as a light incident surface on which light from the third light source 20C is incident.

FIG. 9 is a schematic block diagram of an electric circuit configuration of the illumination device 1 ′ of FIG. As shown in FIG. 9, the third light source 20C is also electrically connected to a control unit 30 including a control circuit, similarly to the first and second light sources 20A and 20B. The control unit 30 also performs lighting control of the third light source 20C in addition to lighting control of the first and second light sources 20A and 20B.
It is assumed that the third light source 20C has an LED 21C. Instead of the LED 21C, a known light source such as an EL (Electro Luminescence) element, an incandescent bulb, a halogen bulb, a cold cathode tube, or the like can be adopted. The light emitted from the third light source 20C may have any color.

(Lighting control)
FIG. 10 is a diagram for explaining an example of lighting control performed by the control unit 30 according to the present embodiment. (A) in FIG. 10 the control mode of the luminance I _A of the first light source 20A of the lighting device 1 'is an explanatory diagram showing the abscissa the time t. (B) of FIG. 10 is a control mode of the luminance I _B of the second light source 20B of the lighting device 1 'is an explanatory diagram showing the abscissa the time t. FIG. 10C is an explanatory diagram showing the control mode of the luminance I _C of the third light source 20C of the illumination device 1 ′ with the time t as the horizontal axis.

Lighting control control unit 30 performs the first light source 20A, as in the first embodiment, as shown in (A) of FIG. 10, the luminance I _A of the first light source 20A from 0 first setting brightness a first increasing control to gradually increased to I _1, following the first increase control, the first maintenance control that maintains the luminance I _a of the first light source 20A in the first set luminance I _1, the Following the first maintenance control, including a first and a reduction control to gradually reduce the brightness of the first set luminance I ₁ to 0 of the first light source 20A, a. The control unit 30 is lighting control is performed for the second light source 20B, similarly to the first embodiment, as shown in FIG. 10 (B), the luminance _{I B} of the second light source 20B from 0 second a second increasing control to gradually increase to the set luminance I _2, subsequently to the second increasing control, a second maintenance control to maintain the luminance I _B of the second light source 20B in the second set luminance I ₂ , subsequently to the second maintenance control, including a second reduction control gradually decreases the luminance I _B from the second set luminance I ₂ 0 of the second light source 20B, a. 10A and 10B are the same as those described in the first embodiment, and a description thereof is omitted here.

Lighting control controller 30 of the third embodiment is performed for the third light source 20C is, as shown in (C) of FIG. 10, a third light source 20C luminance _{I C} 0 from the third set luminance _{I 3} a third control for increasing gradually increasing until, following the third increase control, third and maintenance control of maintaining the luminance I _C of the third light source 20C in the third setting luminance I _3, third Following maintenance control, and a third reduction control is gradually decreased luminance from third setting luminance I ₃ 0 of the third light source 20C, the.

When the control unit 30 and the time to start increasing the luminance I _C of the third light source 20C from 0 by a third increase control of the third increase start time t1c, the second increase start time t1b start third increase It is before the time t1c.
The control unit 30 when the time at which the luminance I _C finishes increased to a third set luminance I ₃ of the third light source 20C by the third increase control of the third increase end t2c, second incremental End The time point t2b is simultaneously with the third increase end time point t2c or ahead of the third increase end time point t2c.

Further, the control unit 30 and the third reduction control by the third light source 20C luminance I _C a third set luminance I the time to start decreasing from ₃ third decrease start point t3c, start the second reduction The time point t3b is simultaneously with the third decrease start time point t3c.
Furthermore, the time from the first increase start time t1a to the third increase end time t2c is 0.2 seconds or less.

  According to such lighting control, an effect that makes it seem that light flows more smoothly from one end side of the first light guide body 10A of the lighting device 1 ′ to the other end side of the second light guide body 10B. It can be carried out. In particular, the appearance of light flowing from one end side to the other end side of the second light guide 10B is improved. In comparison with the illumination device 1 of the first embodiment, since the third light source 20C is added, the brightness of the second light guide 10B can be improved.

Further, in the lighting control of the lighting device 1 'shown in FIG. 10, the increasing rate of the luminance I _B of the second light source 20B in the second increasing control, and the luminance I of the third light source 20C in the third increase control The increase rate of _C may be set so that the one end side of the second light guide body 10B is always visually recognized brighter than the other end side until immediately before the third increase end time t2c. Note that the second increase end time t2b may be earlier than the third increase end time t2c.
The second and third set luminances I ₂ and I ₃ may be set such that the one end side and the other end side of the second light guide body 10B appear to have similar brightness, but are not limited thereto.

The rate of decrease in intensity I _C of the brightness I decrease rate and the third light source 20C in _B of the second light source 20B in the second reduction control and the third reduction control, up to the third reduction end t4c, Each may be set so that one end side of the second light guide body 10B is always visually recognized darker than the other end side. Or you may set so that the one end side and other end side of the 2nd light guide 10B may always be seen to the same brightness. In the present embodiment, the second decrease end time t4b is earlier than the third decrease end time t4c, but may be simultaneous. In the second reduction control and the third reduction control, the luminances I _B and I _C of the second and third light sources 20B and 20C may be set to 0 simultaneously and instantaneously.

The above-described lighting control of the first to third light sources 20A, 20B, and 20C may be repeatedly performed. In this case, at the third decrease end time t4c that is the end point of the third decrease control, By starting the first increase control of the lighting control, the lighting control may be sequentially performed continuously. Further, a turn-off time may be inserted between the third decrease end time t4c and the first increase control start of the next turn-on control.
In the third increase control may be those that increase exponentially with respect to the luminance I _C time t of the third light source 20C.

(Fourth embodiment)
An example in which the illumination device 1 ′ of the third embodiment is applied to a turn lamp of a vehicle such as an automobile will be described with reference to FIG. FIG. 11 is a schematic diagram showing a rear combination lamp 50 ′ mounted on the rear right side of a vehicle body of an automobile as an example of an automobile lamp unit including an illuminating device 1 ′ as a turn lamp of the present embodiment. It is the schematic which looked at lamp 50 'from the back side of a motor vehicle. Compared with the configuration of FIG. 7, the third light source 20C is added. Some of the same features as those in the configuration of FIG.

  The rear combination lamp 50 ′ includes a first portion 50A disposed on the rear surface of the trunk chamber lid 101 of the automobile 100 (see FIG. 6) and a second portion 50B ′ disposed on the rear surface of the body 102 of the automobile 100. It consists of two parts. The first portion 50A has the same configuration as the first portion 50A of the rear combination lamp 50 of the second embodiment. The second portion 50B ′ includes a second light guide 10B, a second light source 20B, a third light source 20C, a lamp 513 (for example, any one of a brake lamp, a back lamp, and a position lamp), A second casing 52B facing the inner side of the vehicle body and a resin cover (not shown) fitted to the outer peripheral edge of the second casing 52B and serving as the front side of the second portion 50B are provided. The first and second light guides 10A and 10B, the first to third light sources 20A, 20B, and 20C in FIG. 11 and the control unit 30 shown in FIG. 9 constitute the illumination device 1 '.

  In the rear combination lamp 50 ′ of the present embodiment, when the lighting control of the lighting device 1 ′ described with reference to FIG. 10 or the lighting control as a modification thereof is performed, the first light guide body when viewed from the rear of the vehicle body The light will appear to flow from the left end of 10A toward the right end of the second light guide 10B. With such an illumination mode, when the right turn lamp (illumination device 1 ′) is turned on, the light is directed toward the right side, which is the direction of change of the automobile, and the length of the first and second light guides 10 </ b> A and 10 </ b> B. It is possible to produce an effect that flows along the direction, and more clearly inform the external observer of the direction of the vehicle's course change.

When the lighting device 1 ′ of the present invention is used as a turn lamp for an automobile as in this embodiment, the length from one end of the first light guide 10A to the other end of the second light guide 10B is about 200 mm to It can be exemplified to be within a range of 500 mm. Moreover, it can be illustrated that the emission color of the first to third light sources 20A, 20B, and 20C and the first and second light guides 10A and 10B is amber.
Further, in the lighting control of FIG. 10 or the lighting control of the modified example, the time from the first increase start time t1a to the third decrease end time t4c is in the range of 0.25 seconds to 1 second. It is preferable. Further, it is preferable that the time from the third decrease start time t3c to the third decrease end time t4c be 0.5 seconds or less. This is because an illumination effect in which light appears to flow smoothly from one end side of the first light guide body 10A toward the other end side of the second light guide body 10B can be more suitably achieved.
Moreover, it is preferable that the time from the third increase end time t2c to the third decrease start time t3c be 0.05 seconds or more. This is to ensure sufficient time for maintaining the first to third light sources 20A, 20B, and 20C at the first, second, and third set luminances I ₁ , I ₂ , and I ₃ , respectively.

The rear combination lamp 50 'shown in FIG. 11 and the left-right symmetric rear combination lamp may be arranged on the left side of the vehicle body as shown in FIG. 6, and the lighting control of the lighting device 1 ′ described with reference to FIG. When the lighting control of the modified example is performed for the left rear combination lamp, when viewed from the rear of the vehicle body, the left end of the second light guide 10B from the right end of the first light guide 10A. A lighting effect that makes it seem that light flows toward is obtained. The lighting device 1 ′ according to the present invention may be used as a turn lamp on both the left and right sides of the front of the vehicle body to perform similar lighting control.
When the lighting device 1 ′ as a turn lamp is turned on as a hazard lamp, the lighting control shown in FIG. 10 or the lighting control of a modified example may be performed.
Regardless of the open / closed state of the trunk chamber lid 101, the lighting control shown in FIG.

(Modification)
The 2nd light source 20B of the illuminating device 1 which concerns on 1st Embodiment and 2nd Embodiment is arrange | positioned at the other end side instead of the one end side of the 2nd light guide 10B, and 2nd light guide from the 2nd light source 20B. The lighting control shown in FIGS. 3, 4 or 5 may be performed by irradiating the other end face 12B of the light body 10B with light.
The second light source 20B of the lighting device 1, 1 ′ of the present invention is arranged on the back side of the other end of the first light guide 10A, and the second light source 20B is visually observed from the front of the lighting device 1, 1 ′. It may not be done.
The lighting device 1, 1 'of the present invention is provided for a roof lamp of a vehicle to illuminate the entire interior of the vehicle, and is provided on the foot side of the door opening, in addition to a turn lamp. A scuff lamp that emits light upward when opening and closing, a foot lamp that is provided at the bottom of the instrument panel to illuminate the feet of the front seat occupant, and is provided in the door pocket of the door trim to emit light upward from the door pocket It can also be used as a lamp provided in the passenger compartment such as a door pocket lamp. Furthermore, the present invention can be used for various uses as required, such as traffic signs, advertisement display lights, warning display lights, illuminations for buildings and gardens, and ad balloon lights.

  The plurality of embodiments of the present invention and the modifications thereof described above are merely representative forms of the present invention, and the present invention is not limited to them. Accordingly, the present invention is within a scope that does not depart from the gist of the present invention, that is, those that can be easily conceived by those skilled in the art from the matters described in the present specification, Various modifications can be made within a so-called equivalent range, and these are also included in the present invention.

DESCRIPTION OF SYMBOLS 1, 1 '... Illuminating device 10A ... 1st light guide 10B ... 2nd light guide 20A ... 1st light source 20B ... 2nd light source 20C ... 3rd light sources 21A-C ... LED
30 ... Control unit (control device)
50, 50 '... rear combination lamp 50A ... first portion 50B, 50B' ... second portion 511-513 ... lamp 52A ... first casing 52B ... second casing 100 ... automobile 101 ... trunk chamber lid 102 ... body

Claims (10)

A lighting device,
A long first light guide and a second light guide, the first light guide and the second light guide being arranged in series with each other in the longitudinal direction;
A first light source for irradiating light to a first end surface of the first light guide on the side far from the second light guide;
A second light source for irradiating light to the first end face of the second light guide on the side close to the first light guide;
A control device that performs lighting control including control of lighting of the first light source and the second light source,
In the lighting control, following the first increase control for increasing the luminance of the first light source from 0 to the first set luminance and the first increase control, the luminance of the first light source is changed to the first luminance. First maintenance control for maintaining at the set brightness of the first, and first reduction control for reducing the brightness of the first light source from the first set brightness to 0 following the first maintenance control. ,
In the lighting control, following the second increase control for increasing the luminance of the second light source from 0 to the second set luminance and the second increase control, the luminance of the second light source is set to the second luminance. Second maintenance control for maintaining at the set brightness of the second, and second reduction control for reducing the brightness of the second light source from the second set brightness to 0 following the second maintenance control. ,
The time when the control device starts to increase the luminance of the first light source from 0 by the first increase control is set as a first increase start time, and the luminance of the second light source is set to 0 by the second increase control. If the second increase start time is a time point at which to start increasing from the first increase start time, the first increase start time is ahead of the second increase start time,
The time point when the control device finishes increasing the luminance of the first light source to the first set luminance by the first increase control is defined as a first increase end time, and the second increase control causes the second increase control. Assuming that the time point at which the luminance of the light source is increased to the second set luminance is the second increase end point, the first increase end point is ahead of the second increase end point,
The time point at which the control device starts to decrease the luminance of the first light source from the first set luminance by the first decrease control is set as a first decrease start time, and the second decrease control is performed to Assuming that the time point at which the luminance of the light source starts to decrease from the second set luminance is the second decrease start time, the first decrease start time is the same as the second decrease start time,
The lighting device, wherein a time from the first increase start time to the second increase end time is 0.2 seconds or less.   2. The lighting device according to claim 1, wherein the second increase start time is the same as the first increase end time or earlier than the first increase end time.   The time when the control device finishes reducing the luminance of the first light source to 0 by the first reduction control is defined as a first reduction end time, and the luminance of the second light source is reduced to 0 by the second reduction control. 2. The first reduction end time is the same as the second decrease end time or earlier than the second decrease end time, when the time point at which the reduction ends is the second decrease end time. Or the illuminating device of Claim 2.   The lighting device according to claim 3, wherein a time from the first increase start time to the second decrease end time is in a range of 0.25 seconds to 1 second.   5. The lighting device according to claim 3, wherein a time from the second decrease start time to the second decrease end time is 0.5 seconds or less.   The lighting device according to any one of claims 1 to 5, wherein a time from the second increase end time to the second decrease start time is 0.05 seconds or more.   The lighting device according to any one of claims 1 to 6, wherein the control device increases the luminance of the first light source exponentially with respect to time by the first increase control.   The lighting device according to any one of claims 1 to 7, wherein the control device increases the luminance of the second light source exponentially with respect to time by the second increase control. A third light source for irradiating light to the second end face of the second light guide that is far from the first light guide;
The lighting control further includes lighting control of the third light source,
In the lighting control, following the third increase control for increasing the luminance of the third light source from 0 to the third set luminance and the third increase control, the luminance of the third light source is set to the third luminance. And a third reduction control for reducing the luminance of the third light source from the third setting luminance to 0 following the third maintenance control. ,
Assuming that the time point at which the control device starts increasing the luminance of the third light source from 0 by the third increase control is a third increase start time, the second increase start time is the third increase start time. Is ahead of,
If the control device finishes increasing the luminance of the third light source to the third set luminance by the third increase control as the third increase end time, the second increase end time is the second increase end time. At the same time as the end of the increase of 3, or before the end of the third increase,
Assuming that the time point when the control device starts to decrease the luminance of the third light source from the third set luminance by the third decrease control is a third decrease start time, the second decrease start time is the second decrease start time. At the same time as the start of the decrease of 3,
The lighting device according to any one of claims 1 to 8, wherein a time from the first increase start time to the third increase end time is 0.2 seconds or less. A long first light guide and a second light guide, the first light guide and the second light guide arranged in series with each other in the longitudinal direction thereof, and the second light guide A first light source for irradiating light to the first end face of the first light guide on the side far from the light guide, and a second light guide on the side near the first light guide. A lighting control method for an illuminating device, comprising: a second light source that irradiates light on one end face;
A first increasing step for increasing the brightness of the first light source from 0 to a first set brightness;
Following the first increasing step, a first maintaining step of maintaining the brightness of the first light source at the first set brightness;
Subsequent to the first maintaining step, a first decreasing step of decreasing the luminance of the first light source from the first set luminance to 0;
A second increasing step for increasing the brightness of the second light source from 0 to a second set brightness;
Following the second increasing step, a second maintaining step of maintaining the brightness of the second light source at the second set brightness;
Following the second maintaining step, a second reduction step of reducing the brightness of the second light source from the second set brightness to 0, and
The time point at which the first increase step starts increasing the luminance of the first light source from 0 is defined as a first increase start point, and the second increase step starts increasing the luminance of the second light source from zero. If the time is the second increase start time, the first increase start time is ahead of the second increase start time,
The time when the first increase step finishes increasing the luminance of the first light source to the first set luminance is defined as a first increase end time, and the second increase step determines the luminance of the second light source. When the time point at which the increase to the second set brightness is finished is a second increase end time point, the first increase end time point is ahead of the second increase end time point,
The time when the first reduction step starts to decrease the luminance of the first light source from the first set luminance is set as a first decrease start time, and the second reduction step sets the luminance of the second light source. When the time point at which the second set brightness starts to decrease is defined as a second decrease start time, the first decrease start time is the same as the second decrease start time.
The lighting control method, wherein a time from the first increase start time to the second increase end time is 0.2 seconds or less.