JP2015028902A - Luminous lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminous lighting device 1 that excites and accumulates sufficient storage light in a luminous body by a light source with low power consumption and that radiates sufficient illumination light to a predetermined periphery by converting the accumulated storage light to the illumination light.SOLUTION: A luminous lighting device includes: a power source part 2 that supplies electric power; a light source part 3 that comprises a light source 3-1 for radiating excitation light and a holding member 3-2 for holding the light source 3-1; a luminous body part 4 that excites and accumulates storage light when receiving the excitation light radiated from the light source 3-1 of the light source part 3 and that converts the accumulated storage light to illumination light to radiate the illumination light; and a shield part 5 that shields a predetermined range from the excitation light so that the excitation light radiated from the light source 3-1 of the light source part 3 cannot be radiated to the predetermined range.

Description

The present invention relates to a phosphorescent illumination device using a phosphorescent material, and in particular, accumulates excitation light from a light source as phosphorescent light, converts the accumulated phosphorous light into visible light, and emits it as illumination light. The present invention relates to a phosphorescent illumination device capable of performing long-time illumination with electric power.

FIG. 8 is a cross-sectional view for explaining the configuration of a conventional phosphorescent illumination device presented in Patent Document 1.

As shown in FIG. 8, this conventional phosphorescent illumination device has a phosphorescent body 101 that is detachable in the vicinity of the luminaire 100. The luminaire 100 includes a light source 102 and the light source 102.
And a socket 103 to which is attached. The light source 102 is an incandescent lamp or an arc tube.

In this phosphorescent illumination device, the phosphorescent body 101 accumulates light with illumination light from the illumination fixture 100 when it is mounted in the vicinity of the illumination fixture 100. The phosphorescent body 101 is made of a translucent material, and covers the light source 102 of the lighting fixture 100 when mounted in the vicinity of the lighting fixture 100.

The phosphorescent body 101 is made of a synthetic resin material containing a phosphorescent material. As the phosphorescent material, for example, a high luminance long afterglow phosphorescent material (alumina type) in which a rare earth metal is bonded to strontium aluminate having a particle size of about 55 μm can be used. The excitation wavelength of this phosphorescent material is 200 nm to 450 nm, and the emission peak wavelength is 520 nm.

In this embodiment, the phosphorescent body 101 is formed in a truncated cone shape from a disk-shaped bottom plate portion and a conical surface-like side wall portion. The upper end portion of the luminous body 1 has a larger opening end than the bottom plate portion, and the light source 102 of the luminaire 100 is inserted therein.

In this phosphorescent luminaire, when the phosphorescent body 101 is mounted in the vicinity of the luminaire 100, the luminaire 101 is put into a normal use state and emits illuminating light. In addition, the phosphorescent body 101 performs phosphorescence.

At this time, a part of the illumination light emitted from the light source 102 of the lighting fixture 101 is the phosphorescent body 101.
It is consumed by the excitation of the phosphorescent material inside, and the remainder transmits the phosphorescent body 101 to illuminate the surroundings. Further, when the phosphorescent material is excited, illumination light is also emitted from the phosphorescent body 101, and the light source 10.
The surrounding light is illuminated together with the illumination light emitted from 2 and transmitted through the phosphorescent body 101. When the light source 102 is turned off, the surrounding illumination is performed only with the illumination light emitted from the phosphorescent body 101.

In this conventional phosphorescent illumination device, when the thickness of the phosphorescent material is increased in order to increase the excitation intensity of the phosphorescent material of the phosphorescent body 101, the transmittance of the phosphorescent material 101 decreases, and the phosphorescent body 101
Since the intensity of the illumination light transmitted through the light source becomes small, the illumination light emitted from the light source must be increased.

In addition, the illumination light emitted from the light source 102 has a small amount of light in the excitation light region that excites the phosphorescent material, and the amount of light in the visible light region used for illumination is almost all, so it is difficult to obtain a sufficient amount of excitation of the stored light. It was.

JP 2008-47376 A

In the conventional phosphorescent illumination device using the phosphorescent material as described above, the phosphorescent body must be translucent to excite the phosphorescence with the illumination light emitted from the light source and illuminate the surroundings through the phosphorescent body. However, in order to perform sufficient illumination, the power consumption of the light source has to be increased.
In addition, most of the illumination light emitted from the light source has a wavelength in the visible light region, and there is little light in the wavelength region that excites the stored light in the phosphor, which makes it difficult to excite the stored light sufficiently. It was.

Therefore, the present invention is proposed in view of the above-described circumstances, and a light source with low power consumption sufficiently excites light storage in a phosphor, and converts this light storage into illumination light to provide a sufficient amount of illumination. An object of the present invention is to provide a phosphorescent illumination device that can be used.

The first invention of the present invention is a phosphorescent illumination device 1 that accumulates excitation light emitted from a light source as accumulated light, converts the accumulated accumulated light into illumination light, and emits it to illuminate a predetermined range. A light source unit 3 including a power supply unit 2 to be supplied, a light source 3-1 that emits excitation light, and a holding member 3-2 that holds the light source 3-1, and excitation emitted from the light source 3-1 of the light source unit 3. When receiving light, the phosphor storage unit 4 that excites and accumulates the stored phosphor, converts the accumulated stored light into illumination light, and radiates it;
And a shielding unit 5 that shields the excitation light emitted from the light source 3-1 of the light source unit 3 from being emitted to a predetermined range. When power is supplied from the power source unit 2 to the light source unit 3, the light source unit Three light sources 3
Excitation light is emitted from -1 and received by the phosphor storage unit 4 and stored as the phosphor storage, and then the stored phosphor stored in the phosphor storage unit 4 is converted into illumination light and emitted to illuminate a predetermined range with only illumination light Thus, a phosphorescent illumination device 1 is provided.
According to a second aspect of the present invention, in the phosphorescent illumination device 1 that accumulates excitation light emitted from a light source as accumulated light, converts the accumulated accumulated light into illumination light, and emits it to illuminate a predetermined range. A light source unit 3 including a power supply unit 2 to be supplied, a light source 3-1 that emits excitation light, and a holding member 3-2 that holds the light source 3-1, and excitation emitted from the light source 3-1 of the light source unit 3. The reflection part 6 made of a transparent member that reflects a part of the light and the other part of the excitation light emitted from the light source 3-1 of the light source part 3 are directly received and reflected by the reflection part 6. A phosphorescent body portion 4 that excites and accumulates each of the stored phosphors by simultaneously receiving a part thereof, converts the accumulated phosphors into illumination light, and radiates them.
And the shielding unit 5 that shields the excitation light emitted from the light source 3-1 of the light source unit 3 from being emitted to a predetermined range, and when power is supplied from the power supply unit 2 to the light source unit 3. After the excitation light is emitted from the light source 3-1 of the light source unit 3 and received by the phosphor storage unit 4 and accumulated as the phosphorescence, the accumulated light accumulated in the phosphor storage unit 4 is converted into illumination light and emitted to be reflected by the reflection unit 6. The phosphorescent illumination device 1 is characterized in that it transmits and illuminates a predetermined range only with illumination light.
According to a third aspect of the present invention, the phosphorescent body portion 4 is divided, sequentially irradiated with excitation light, and the accumulated light is sequentially converted into illumination light for illumination. The phosphorescent illumination device 1 described in the invention is provided.

According to the present invention, the power supply unit 2 that supplies power, the light source 3-1 that emits excitation light, and the light source 3-
When receiving excitation light radiated from the light source 3-1 of the light source unit 3 and the light source 3-1 of the light source unit 3, the stored light is excited and accumulated, and the accumulated stored light is converted into illumination light. The light storage unit 4 that radiates and the shielding unit 5 that shields the excitation light emitted from the light source 3-1 of the light source unit 3 from being emitted to a predetermined range. 3 is supplied with the excitation light from the light source 3-1 of the light source unit 3, received by the phosphor storage unit 4, accumulated as the stored phosphor, and then stored in the phosphor storage unit 4 as illumination light. Light that is converted and emitted, and illuminates a predetermined range with only illumination light, so that the phosphor can sufficiently excite the phosphor with a light source with low power consumption, and this phosphor can be converted into illumination to illuminate with a sufficient amount of light. A mold illumination device 1 can be provided.

It is a figure for demonstrating the Example of this invention, and is a figure which shows the side surface of the phosphorescent type illuminating device 1. FIG. FIG. 4 is a diagram showing details of a side surface of the light source unit 2. It is a figure which shows the glass reflection characteristic for demonstrating the reflective state of excitation light and illumination light, and shows a reflectance (%) in a vertical direction and an incident angle (degree) in a horizontal direction. It is a figure for demonstrating the operation | movement in the Example of this invention, FIG. 4 (A) is a figure which radiates | emits most of excitation light directly to the light storage body part 4, and excites light storage, FIG.4 (B) is FIG. It is a figure which excites light storage by radiating | emitting the other part of excitation light directly to the luminous body part 4, while radiating to the luminous body part 4 after reflecting a part of excitation light with the transparent body part 6. FIG. It is a schematic sectional drawing for demonstrating the luminous body part 4 in the Example of this invention. In the usage example of this invention, it is a figure for demonstrating the light emission example of LED which divides and illuminates a phosphorescent part, FIG. 5 (A) is a side view, FIG.5 (B) shows a front view, Among several LED It is a figure showing the state where only the first one emitted light. It is a figure for demonstrating the brightness of the illumination light by the light emission order of the example of use of this invention, FIG.7 (A) is the 1st one of FIG. FIG. 6B is a diagram showing the first one in FIG. 6B for the third time and the other one for the second time. It is a figure for demonstrating the conventional phosphorescent type illuminating device.

The best mode for carrying out the present invention will be described with reference to FIGS. 1 to 5, but the present invention is not limited to such an embodiment.

Next, an example will be described.
As shown in FIG. 1, the phosphorescent illumination device 1 of the present invention stores a light when receiving a power source 2 that supplies power, a light source 3 that emits excitation light, and excitation light emitted from the light source 3. A phosphor storage unit 4 that excites and accumulates, converts the accumulated phosphor to illuminating light, and radiates; a shielding unit 5 that shields the excitation light emitted from the light source unit 3 from being emitted within a predetermined range; and a light source The reflection part 6 which consists of a transparent member which radiates | emits to the phosphorescent body part after reflecting a part of excitation light radiated | emitted from the part 3 is comprised.

The power supply unit 2 uses a dry cell or a rechargeable battery in order to improve portability as a power source. Furthermore, portable small power generators such as wind power and sunlight are used outdoors.

As shown in FIG. 2, the light source unit 3 holds a light source 3-1 such as an LED, a fluorescent lamp, or a discharge lamp that radiates most of the power consumption as excitation light, and a power from the power source unit 2. The light source 3
-1 is formed of a holding member 3-2 for forming an electric wiring path for supplying to -1 in plastic, metal or the like.
For the light source 3-1, it is easy to select the emission wavelength of the emitted excitation light.
Use ED. When this LED is used, as shown in FIG. 2, it is installed on the holding member 3-2 so that the center of radiation is substantially vertical at the position P0. As the emission wavelength of the excitation light, a wavelength that is hardly included in the visible light region such as ultraviolet (380 nm), purple (400 nm), or the like is selected. For example, a purple LED that has relatively little effect on the human body compared to ultraviolet rays is an LED.
Model name LP-R5UV from PARADISE INTERNET SHOP
400 is commercially available. This LED is bullet-shaped and has a radiation angle θ of 15 degrees and an acute angle. When this LED is used, since the driving voltage is 3.3 V, for example, the power supply unit 2 uses three dry batteries (1.5 V specification) connected in series and adjusted in voltage.

As shown in FIG. 5, when the phosphorescent body 4 receives excitation light on a base material 4-1 such as plastic, metal, paper, etc., the phosphorescent body 4 excites and accumulates the accumulated light, converts the accumulated light into illumination light, and radiates it. Phosphorescent material 4
-2 is applied or adhered. The base 4-1 is assumed to be an opaque white or specular reflection using an aluminum material when the illumination light is emitted only from the light receiving side of the excitation light, and transparent when it is also emitted to the opposite side of the light receiving side. In the phosphorescent material 4-2, the wavelength range excited as the phosphorescence is set from the blue light to the short wavelength side (approximately 250 nm to approximately 450 nm), and the wavelength range of the illumination light emitted by converting the phosphorescence is longer than the blue light. (Approximately 450 nm to approximately 650 nm). In particular, if the radiation having a wavelength in the visible light band is increased, the radiation efficiency of the illumination light is increased. As the phosphorescent material 4-2, phosphorescent ink, phosphorescent sheet and the like are commercially available from Nemoto Special Chemical Co., Ltd. under the trade name of Luminova.
And the phosphorescent body part 4 makes the lower end the position P0-1 of the holding member 3-2 end of the light source part 3, and makes the upper end the position P4 which contacts the transparent member part 6. FIG.

The shield 5 is made of opaque plastic, metal, paper, etc., and the power source 2 and the light source 3
In addition, the wavelength of the excitation light emitted from the light source unit 3 to the phosphor storage unit 4 is likely to cause a failure when entering the human eye even if the wavelength of the excitation light is purple. The height of the part 5 is increased to block the excitation light from the periphery where illumination is to be performed.

The transparent member portion 6 is mainly formed of transparent glass, plastic or the like, and has a lower end as a position P02 at the end of the holding member 3-2 of the light source portion 3 and an upper end as a position P4 that contacts the phosphorescent body portion 4. The excitation light emitted from the light source 3-1 of the unit 3 is moved from the position P2 to the position P in the direction of the phosphor storage unit 4.
4, while reflecting the light stored in the phosphor storage unit 4 and transmitting the emitted illumination light to illuminate a predetermined periphery.

Next, the operation will be described with reference to FIG.
In FIG. 1, when power is supplied from the power supply unit 2 to the light source unit 3, the excitation light R0 is emitted from the light source unit 3 at the radiation angle θ from the center position P0 of the light source unit 3 to the position P1 of the phosphor storage unit 4 and the transparent member unit 6. Position P
Radiated between the two. For example, a part of the excitation light R0 is reflected between the transparent member portion 6 between the position P2 and the position P4 of the transparent member portion 6, and then radiated between the position P3 and the position P4 of the phosphorescent body portion 4,
The other part of the excitation light R0 is directly radiated to the range from the position P1 to the position P4 of the phosphor storage unit 4. Therefore, almost all of the excitation light R0 is radiated to the phosphor storage unit 4 and accumulated as the phosphorescence. As shown in FIG. 2, the light source 3-1 is installed on the holding member 3-2 so as to be vertically emitted from the center position P 0 of radiation, and the holding member portion 3-3 apart from the position of the center position P 0 by a distance X1. The lower end of the phosphor portion 4 is installed at the position P01 which is the second end, and the lower end of the transparent member portion 6 is installed at the position P02 which is the other end of the holding member portion 3-2 which is a distance X2 away from the center position P0. , Phosphorescent body part 4
And the upper end of the transparent member part 6 is formed so as to contact at the position P4.
Then, leakage light other than the excitation light R0 radiated in the horizontal direction from the light source unit 3 is shielded by the shielding unit 5.

Next, as shown in FIG. 1, the phosphorescence accumulated in the phosphor storage unit 4 conforms to the perpendicular direction of the phosphor storage unit 4 as L0 from the position P1, L1 from the position P3, and L2 from the position P4. Since it is converted into illumination light in the range of position P1 to position P4 and emitted through the transparent member part 6, it is not mixed with the excitation light emitted obliquely from the light source part 3 to the phosphor storage part 4. The surroundings can be illuminated only with illumination light.

In this way, almost all of the excitation light R0 emitted to the phosphor storage unit 4 is accumulated by exciting the accumulated light, and this accumulated light is converted into illumination light having a wavelength in the visible light region different from the wavelength of the excitation light R0. Since the light is converted and the periphery is directly illuminated from the light receiving surface side of the excitation light of the phosphor storage unit 4, the luminous efficiency is very good and the power supplied from the power supply unit 2 is small.
Further, since the excitation light R0 and the horizontal leakage light emitted from the light source unit 3 are not emitted to the illuminated surroundings, they are safe from entering human eyes.

Next, it demonstrates still in detail using FIGS.
FIG. 3 shows the reflection characteristics when glass is used for the transparent body portion 6. The vertical axis represents the reflectance (%) and the horizontal axis represents the incident angle (degree). For example, when the illumination light is incident on the transparent body 6 at an incident angle of 45 degrees, the reflectance becomes 10%. When the incident angle becomes smaller than this, the reflectance decreases and most of the illumination light passes through the transparent body 6. Further, when the excitation light R0 is incident on the transparent body 6 at an incident angle of 75 degrees, the reflectance is 35%, and when the incident angle is larger than this, the reflectance is further increased and the incident angle is 8
If it exceeds 0 degrees, most of the excitation light R0 is reflected.
The following description will be made based on the reflection characteristics shown in FIG.

FIG. 4A shows a state in which the phosphorescent body portion 4 is installed from the position P01 to the position P2. The distance X1 from the center position P0 of the light source 3-1 of the light source unit 3 to the holding member end P01 is set to approximately 1.5 times the diameter of the light source. For example, when an LED having a diameter of 5 mm is used as the light source 3-1, the distance X
1 is approximately 7.5 mm. This is a guideline for shortening the distance from the light source as much as possible so that the luminous body portion 4 and the light source 3-1 do not come into contact with each other.
Next, the position of P1-1 indicates the end side of the emission of the excitation light R0, and the position of P2 indicates the other end side of the emission of the excitation light R0. Therefore, excitation light R0 is stored in phosphorescent body 4.
Are all radiated in the range of P1-1 to P2 indicated by the thick line of FIG.

On the other hand, the transparent body portion 6 is installed at a position P02 separated by a distance X2 (= X1) on the side opposite to the phosphorescent body portion 4 so as to be substantially perpendicular to the horizontal direction of the light source portion 3. If it does so, it will contact with the luminous body part 4 in the position of P2.

When the phosphorescent body portion 4 and the transparent body portion 6 are thus installed, the installation angle θ1 of the phosphorescent body portion 4 with respect to the vertical axis with respect to the horizontal axis of the light source portion 3 is converted from the phosphorescence accumulated from the phosphorescent body portion 4. Thus, the illumination light La emitted at a right angle becomes equal to the incident angle θ <b> 2 that enters the transparent body 6.
For example, if the radiation angle θ of the excitation light R0 is 30 degrees, θ1 and θ2 are both 28.3 degrees as measured values from the figure, and are close to θ. Accordingly, since the incident angle θ2 at which the illumination light La is incident on the transparent body 6 is 28.3 degrees, the reflectance is 10% or less from FIG. 2, and most of the illumination light La passes through the transparent body 6 and illuminates the surroundings. To do.

The installation angle θ1 with respect to the vertical axis of the phosphor portion 4 is (90 degrees−θ1) when converted from the light source section 3 side, and is about (90 degrees−θ). If the installation angle θ1 of the luminous body portion 4 is made larger than the emission angle θ of the excitation light R0, the angle θ2 at which the illumination light La emitted from the luminous body portion 4 is incident on the transparent body portion 6 is also increased and the reflectance is increased. As the amount of light that illuminates the surroundings decreases, a part of the illumination light La is shielded by the shielding unit 5 and the amount of light further decreases.

As described above, if the installation angle of the luminous body portion 4 is set to (90 degrees−θ) with respect to the light source portion 3 as shown in FIG. 4A, the excitation light R0 from the light source portion 3 is almost not in the luminous body portion 4. All is emitted and stored as light storage, and this stored light storage is converted into illumination light and emitted through the transparent body 6 of the light storage type illumination device 1 to illuminate the surroundings.

Next, the example which expands the illumination range by increasing the luminous area of the luminous body part 4 using FIG. 4 (B) is demonstrated.
FIG. 4B is a diagram illustrating a case where the phosphorescent body 4 is placed parallel to a line connecting the positions of the center positions P0 and P2 of the light source unit 3 from the position P01 so as to be perpendicular to the position P02 of the light source unit 3. Body 6
The state installed in the position P4 which contacts is shown.
When the phosphorescent body portion 4 and the transparent body portion 6 are thus installed, the position P1 of the phosphorescent body portion 4 is changed to the position P3.
Is directly radiated with excitation light R0. Then, the excitation light R0 is directly radiated from the position P3 to the position P4 of the luminous body portion 4, and the excitation light R0 reflected from the position P2 of the transparent body portion 6 is radiated as reflected light. Therefore, as shown by the thick line portion in FIG. 4B, most of the excitation light R0 radiated from the position P1 to the position P4 of the luminous body portion 4 excites the luminous energy and accumulates in the luminous body portion 4.

At this time, the installation angle θ3 with respect to the vertical axis of the phosphorescent body portion 4 is equal to the incident angle θ4 at which the illumination light Lb emitted from the phosphorescent body 4 after being converted from the phosphorescence accumulated from the phosphorescent body portion 4 is incident on the transparent body portion 6. . For example, if the radiation angle θ of the excitation light R0 is 30 degrees, θ3 and θ4 are both 15 degrees and θ / 2 as measured values from the figure. Accordingly, the incident angle θ at which the illumination light Lb is incident on the transparent body 6.
Since 4 is 15 degrees, the reflectance is 10% or less from FIG. 3, and most of the illumination light Lb is transmitted through the transparent body 6.

On the other hand, the incident angle θ5 of the excitation light R0 incident on the transparent body 6 at the position P2 is (90 degrees −
Since θ3 is 15 degrees because θ3 is equal to θ3), θ5 becomes 75 degrees, and the reflectivity is about 38% from FIG.
It becomes. The incident angle range of the excitation light R0 to the transparent body portion 6 is from 75 degrees to about 8 as measured values in the figure.
Since it becomes 3 degrees (incident angle of the excitation light R0 from the position P0 to the position P4), the excitation light R0 irradiated between the position P2 and the position P4 is reflected by approximately 50% or more and is emitted to the phosphor storage unit 4. Accumulated by exciting phosphorescence. At this time, since approximately 1/4 of the excitation light R0 (converted from the incident angle range to the transparent body portion 4) is reflected by the transparent body portion 6, it is approximately 50% that is used as the light storage. 1/8. Therefore, direct incident 3/4 + reflected incident 1/8 = 0.875 with respect to the entire pumping light R0, and nearly 90% of the pumping light R0 is used for storing light.
When the installation angle θ3 with respect to the vertical axis of the luminous body portion 4 is converted from the light source portion 3 side (90 degrees −
θ3) and therefore (90 ° −θ / 2).

The shape and size of the phosphorescent illumination device 1 based on FIG. 4B is approximately 15 mm wide × 56 mm long if the light source used is a 5φ LED. The width is set according to the number of LEDs used.
For example, if 4 LEDs are used at an interval of 5 mm, 4 LEDs × (LED diameter 5 mm + interval 5
mm) = 40 mm. It can be seen that this shape provides sufficient portability. (Power supply unit 2
except for)
When the installation angle θ3 of the luminous body portion 4 is smaller than θ / 2, the emission angle of the excitation light R0 to the luminous body portion 4 and the incident angle to the transparent body portion 6 are increased, and the luminous body portion that accumulates the excitation light R0. 4 and the area of the transparent body part 6 to be reflected increase. For this reason, it is necessary to increase the light quantity of the excitation light R0 and to increase the shape of the phosphorescent illumination device 1, and the shape is set in consideration of power consumption and portability.

In this way, by setting the phosphorescent body portion 4 using the reflection from the transparent body portion 6, the illumination range can be expanded without changing the light source.

As described above, as shown in FIG. 4B, the installation angle between the light source unit 3 and the phosphor storage unit 4 is (90 degrees −
θ / 2), most of the excitation light R0 from the light source unit 3 is radiated to the phosphor storage unit 4 and accumulated as phosphorescence. The accumulated phosphor is converted into illumination light, and the transparent body of the phosphorescent illumination device 1 is stored. Part 6
The surroundings are radiated from and illuminated.

On the other hand, in FIG. 4 (A), when the installation angle θ1 of the luminous body portion 4 is made larger than θ, the angle θ2 at which the illumination light La from the luminous body portion 4 enters the transparent body portion 6 also becomes larger and the reflectance increases. As the amount of light that illuminates the surrounding area decreases, a part of the illumination light La is shielded by the shielding unit 5 and the amount of light further decreases. In FIG. 4B, the installation angle θ3 of the phosphor storage unit 4 is set to θ / If it is smaller than 2, the radiation angle of the excitation light R0 to the phosphorescent body 4 and the transparent body 6 is increased, and the areas of the phosphorescent body 4 for storing the excitation light R0 and the transparent body 6 for reflection are increased.

Therefore, the installation angle of the luminous body portion 4 with respect to the light source portion 3 is changed from (90 degrees −θ) to (90 degrees −θ /
If it is selected within the range of 2), most of the excitation light R0 can be used for light storage, and the phosphorescent illumination device 1 can be set to an optimum size.

Further, when the radiation angle θ of the excitation light R0 is larger than 45 degrees, the illumination light La from the phosphorescent body portion 4 is obtained.
However, the angle θ2 incident on the transparent body 6 is also increased, the reflectance is increased, the amount of light that illuminates the surroundings is reduced, and a part of the illumination light La is shielded by the shielding unit 5, and the amount of light is further reduced. . When the radiation angle θ of the excitation light R0 is made smaller than 10 degrees, the excitation light R to the phosphor storage part 4 is obtained.
The area of the luminous body portion 4 that stores the excitation light R0 and the transparent body portion 6 that reflects the light must be increased as the radiation angle of 0 increases.

Therefore, if the radiation angle θ of the excitation light R0 is selected in the range of 10 degrees to 45 degrees, the excitation light R
Most of 0 can be used for phosphorescence and the phosphorescent illumination device 1 can be set to an optimum size.

And even if it radiates | emits excitation light R0 to the phosphorescent material 4-2 from the diagonal direction as FIG. 5 shows, it accumulate | stores in the phosphorescent material 4-2 as a phosphorescent according to light quantity, and this accumulated phosphorous is stored in the phosphorescent material 4
The direction of the light is changed to the illumination light L0 around the right angle direction of -2.

Thus, even if excitation light is incident on the phosphor storage body 4 in an oblique direction to excite and accumulate the accumulated light, the accumulated light can be converted into illumination light and emitted around the perpendicular direction. Can be easily removed from the optical path in the radiation range of the illumination light.

As described above, according to the phosphorescent illumination device 1 according to the present invention, after the excitation light is emitted from the light source unit 3 in the oblique direction of the phosphor storage unit 4 to accumulate the accumulated phosphor, the accumulated phosphor is used as the illumination light. Since the illumination light is emitted in the direction perpendicular to the phosphor storage unit 4 and illuminates the periphery, the excitation light and the illumination light are in different directions, and the periphery of the phosphorescent illumination device 1 is only the illumination light not including the excitation light. Eye-safe lighting can be performed.
Further, the excitation light is not used for the illumination light, but is used only for the excitation of the phosphorescence of the phosphor storage unit 4 and this excited accumulation is converted only to the illumination light in the visible light range, so that the excitation light can be reduced. As a result, low power consumption can be achieved.
Furthermore, since the phosphor storage unit 4 can accumulate sufficient phosphorescence even with low power consumption, the illumination light can be continuously emitted for a predetermined time without temporarily emitting excitation light from the light source unit 3. Therefore, by intermittently emitting excitation light, it is possible to further reduce power consumption while continuously emitting illumination light.

Next, an actual usage example will be described with reference to FIGS.
As shown in FIG. 6A, the light Ld and the reflected light Lr are directly emitted from the light source 3-1 to the phosphor storage unit 4 and accumulated as the phosphor. FIG. 6B shows an example in which eight LEDs (Led 1 to Led 8) are used as the light source 3-1 in the phosphor illuminator 1, and a case where power is first supplied to Led 5 therein is shown by hatching. As shown in FIG. 5, the excitation light is emitted by Led5 at the position of S5 and stored as accumulated light, and then converted into illumination light and emitted.

Then, as shown in FIG. 7A, for example, the light source 3-1 is replaced with Led5, Led6,.
-Light is emitted for a certain period (several seconds to several minutes) in the order of Led4 and Led5. If it does so, each position (S5, S6, ..., S4, S5) of the luminous body part 4 radiated | emitted in order by each Led
Sequentially accumulates light and emits illumination light. Since the accumulated light is radiated and decreased with time, the amount of illumination light due to the accumulated light is large and decreases with time immediately after the excitation light is irradiated, as shown in a pseudo manner in the shaded area in FIG. Since the excitation light is radiated in the second order at the position of S5, it is added to the remainder of the previous light storage and stored, so the illumination light also increases accordingly.
FIG. 7B shows an example in which the second excitation light is emitted in order, except for the position of S5, and only S5 is the third time. If the number of repetitions is increased in this way, the amount of illumination light increases slightly but overall.

Therefore, by dividing the phosphor storage part 4 into eight parts and sequentially irradiating the excitation light sequentially, the power used can be reduced to 1/8 compared to the case where the entire phosphor storage part is simultaneously emitted with the excitation light. The number of divisions is optimized depending on the size of the phosphor storage unit 4 and the light source used.
In addition, once the phosphorescent body portion 4 accumulates light, it continues to emit illumination light to such an extent that the surroundings can be viewed even without being irradiated with excitation light. Therefore, if the phosphorescent body portion 4 is separated and carried, It can be used as a simple lighting device that does not need to be used.

Since the present invention can perform illumination for a long time with low power consumption, it can be effectively used for a guide board at night, garden illumination, a gate fence, and the like. In particular, it is promising for a lighting device in a place where electric power can be intermittently obtained outdoors such as in the mountains and the sea by wind, hydropower, sunlight, etc., and has an energy saving and environmentally friendly effect.

DESCRIPTION OF SYMBOLS 1 Light storage type illuminating device 2 Power supply part 3 Light source part 3-1 Light source 3-2 Holding part 4 Light storage part 4-1 Base 4-2 Light storage material 5 Shield part 6 Transparent body part

Claims (3)

In a phosphorescent illumination device that accumulates excitation light emitted from a light source as luminous energy, converts the accumulated luminous energy into illumination light, radiates, and illuminates a predetermined range,
A power supply for supplying power;
A light source unit comprising the light source that emits the excitation light and a holding member that holds the light source;
A phosphorescent body that excites and accumulates the phosphorescent light when receiving the excitation light emitted from the light source of the light source unit, converts the accumulated light into the illumination light, and radiates;
A shielding unit that shields the excitation light emitted from the light source of the light source unit from being emitted to the predetermined range;
Consisting of
When the power is supplied from the power supply unit to the light source unit, the excitation light is emitted from the light source of the light source unit, received by the phosphor storage unit, and stored as the phosphor storage, and then stored in the phosphor storage unit. The stored light is converted into the illumination light and emitted to illuminate the predetermined range with only the illumination light. In a phosphorescent illumination device that accumulates excitation light emitted from a light source as luminous energy, converts the accumulated luminous energy into illumination light, radiates, and illuminates a predetermined range,
A power supply for supplying power;
A light source unit comprising the light source that emits the excitation light and a holding member that holds the light source;
A reflecting portion made of a transparent member that reflects a part of the excitation light emitted from the light source of the light source portion;
The other part of the excitation light emitted from the light source of the light source part is directly received and the part of the excitation light reflected by the reflection part is simultaneously received to excite and accumulate the accumulated light respectively. And the phosphorescent body portion that converts the accumulated phosphorescence into the illumination light and radiates it, and
A shielding unit that shields the excitation light emitted from the light source of the light source unit from being emitted to the predetermined range;
Consisting of
When the power is supplied from the power supply unit to the light source unit, the excitation light is emitted from the light source of the light source unit, received by the phosphor storage unit, and stored as the phosphor storage, and then stored in the phosphor storage unit. The stored light illuminating device, wherein the stored light is converted into the illumination light and emitted, passes through the reflection portion, and illuminates the predetermined range with only the illumination light. 3. The phosphorescent illumination device according to claim 1, wherein the phosphorescent part is divided and sequentially irradiated with excitation light, and the accumulated light is sequentially converted into illumination light for illumination.