JP2005109463A - Planar light source, lighting device and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long-life, low heat generation planar light source or lighting device having a simple structure without using a lens and an excellent heat dissipation structure, which can easily increase the degree of integration, and has a high concentration and illuminance. It is an object of the present invention to provide a planar light source and an illumination device that can be obtained and adjusted.
In a planar light source configured by arranging a plurality of semiconductor light emitting elements (1) on a substrate (2) in a matrix matrix, at least one semiconductor among the plurality of semiconductor light emitting elements (1) arranged on a row or column. In the light emitting element 1, the first angle of 90 degrees or less of the two angles formed by the electrode direction line and the center direction line is 90 degrees or less of the two angles formed by the array direction line and the center direction line. Is greater than the second angle.
[Selection] Figure 1

Description

  The present invention relates to a planar light source in which semiconductor light-emitting elements such as LEDs are integrated, and an illumination device including the planar light source, and more particularly to a planar light source and an illumination device that can obtain a high concentration and illuminance suitable for a microscope light source.

In general, various fine specimens are observed with a microscope in medicine and science and engineering, and a tungsten lamp, a halogen lamp, a xenon lamp, a mercury lamp, or the like with high illuminance is used.
However, these lamps are expensive due to their high heat generation and complicated heat dissipation and heat removal structures, and additional cooling structures. Further, there has been a problem that the lamp has a short life due to use under severely thermal conditions.
In addition, there are problems such as the burden on the observer due to the generation of high heat, adverse effects on the subject and high power consumption.

Thus, several inventions have been disclosed to deal with such problems.
For example, Patent Document 1 discloses an invention in which a light-emitting element such as a plurality of LEDs is used as a light source as a condensing illumination device, and an optical system is constructed that repeatedly irradiates the same illumination field with the light flux of the light source using two convex lenses. It is disclosed.
According to the invention disclosed in Patent Document 1, by adopting a light emitting element such as an LED as a light source, an ideal cold light source with less heat generation can be obtained. In addition, light can be concentrated in the free illumination field.

Further, in Patent Document 2, a point light source using an LED is used, and a light beam from the point light source is reflected by a half mirror and directed to an object to be observed through an objective lens. There is disclosed a microscope apparatus including an optical system formed so as to form an image with an imaging lens after passing through a mirror, and accommodating a point light source and the optical system as a unit.
In the microscope apparatus disclosed in Patent Document 2 configured as described above, a microscope excellent in maintaining accuracy, robustness, and portability of the optical system can be provided without the need for daylighting.

Furthermore, the invention disclosed in Patent Document 3 includes a light source including at least one semiconductor light emitting element, a drive circuit that controls light emission of the semiconductor light emitting element, and a battery installation unit that supplies power to the semiconductor light emitting element and the drive circuit. A microscope illuminating device having the same form as the engaging portion of the frame body supporting the lamp light source.
In this microscope illumination apparatus, the specimen on the stage provided in the microscope is illuminated by connecting it to the microscope. Since a semiconductor light emitting element such as an LED is used as the light source, it is possible to provide a light source having a long life while suppressing heat generation.

JP 2001-188174 A JP 2003-207718 A JP 2003-215461 A

  However, in the above-described conventional technology, for example, in the invention disclosed in Patent Document 1, two convex lenses must be used for condensing, and the optical system becomes complicated and expensive. There was a problem. In addition, there is a problem that it is not always easy to use because it requires an operation to adjust the focal length of the lens in order to collect light with the lens. Furthermore, since elements such as LEDs are accommodated in the cylindrical body, there is a problem that the degree of integration is limited even if the element consumes less power.

  The invention disclosed in Patent Document 2 also includes an optical system having a half mirror and an imaging lens. Therefore, as in Patent Document 1, the optical system is complex and expensive, and a light source is built in. Therefore, there is a problem of inconvenience because the light sources cannot be handled separately and independently. Moreover, it was a point light source, and there also existed the subject that it was difficult to obtain high illumination intensity.

  Also in the invention disclosed in Patent Document 3, since it is an optical system that guides light from a light source using a lens, there is a problem of being complicated and expensive like Patent Document 1 and Patent Document 2. In addition, since it is detachable from the microscope through the engaging portion, there is a problem that it lacks versatility, and since it is stored in the lamp house, there is a problem that it is difficult to increase the degree of integration of the light sources.

  The present invention has been made in response to such a conventional situation, and is a long-life, low-heat surface light source or illumination that can be used not only as a light source for a microscope but also as an ordinary table-top illumination light source. It is a device that has a simple structure without using a lens, has excellent heat dissipation structure, can easily increase the degree of integration, can obtain a high concentration and illuminance, and can be adjusted. An object is to provide a light source and a lighting device.

In order to achieve the above object, the planar light source according to the first aspect of the present invention is a planar light source configured by arranging a plurality of semiconductor light emitting elements in a matrix form on a substrate, and is arranged on a row or column. In each of a plurality of semiconductor elements, a straight line connecting two electrode legs is defined as an electrode direction line, and a substantially middle portion of the plurality of semiconductor light emitting elements arranged in a matrix matrix and a substantially middle position between the two electrode legs. In at least one semiconductor element among a plurality of semiconductor light emitting elements arranged on a row or column when a straight line connecting the sections is defined as a center direction line and a line parallel to the row or column is defined as an array direction line The first angle of 90 degrees or less of the two angles formed by the electrode direction line and the center direction line is the second angle of 90 degrees or less of the two angles formed by the arrangement direction line and the center direction line. Is greater than the angle
In the planar light source having the above configuration, since the first angle of at least one semiconductor light emitting element arranged on a row or column is larger than the second angle, the two electrode legs of the semiconductor element are formed by a plurality of electrode legs. The semiconductor light emitting element can be physically moved toward the center by bending the semiconductor element toward the substantially central portion.

According to a second aspect of the present invention, there is provided a lighting device comprising: a planar light source configured by arranging a plurality of semiconductor light emitting elements on a substrate in a matrix matrix; and at least a tip portion of the semiconductor light emitting element of the planar light source. A housing including an illumination head that is exposed from the surface, a neck rod that is connected to the illumination head in a supportable manner, and a switch that suspends the neck rod to turn on the planar light source. is there.
In the illuminating device having the above-described configuration, at least the tip portion of the semiconductor light emitting element of the planar light source configured to be arranged in a matrix matrix has an action of controlling the temperature rise of the illumination head.

According to a third aspect of the present invention, there is provided an illumination device that can support the planar light source according to the first aspect, an illumination head that accommodates the planar light source according to the first aspect, and the illumination head. A neck rod to be connected and a casing provided with a switch for lighting the planar light source by hanging the neck rod.
In the illuminating device having the above-described configuration, the planar light source provided in the illuminating device by bending the electrode leg of the semiconductor light emitting element so that the semiconductor light emitting element faces toward the center by providing the planar light source according to claim 1. It has the effect | action that the integration degree of can be raised.

According to a fourth aspect of the present invention, there is provided a lighting system comprising: the lighting device according to the second or third aspect; a battery connected to the lighting device for supplying power; and a solar connected to the battery for charging. It has a panel.
In the lighting system having the above-described configuration, electricity generated by the solar panel is charged in the battery, and the electricity is supplied to the lighting device according to claim 2 or claim 3.

Moreover, the lighting system which is invention of Claim 5 is a lighting system of Claim 4 connected to an illuminating device and a solar panel via the controller which prevents the overdischarge and overcharge of a battery.
In the illumination system configured as described above, the controller has an action of controlling charging / discharging of the battery to prevent overcharge or overdischarge.

Moreover, the illumination system which is invention of Claim 6 is an illumination system of Claim 4 or Claim 5 which connected the inverter to the battery.
The lighting system configured as described above has an effect that the DC power charged in the battery is converted into AC power having a constant voltage, current, and frequency or variable through the inverter.

  In the planar light source according to the first aspect of the present invention, since the semiconductor light emitting element is used, the semiconductor light emitting element is physically formed by bending the two electrode legs of the semiconductor light emitting element while having a small heat generation amount and a long life. Therefore, it is possible to improve the illuminance by increasing the concentration height. In addition, since the number of semiconductor light emitting elements to be moved closer to the center can be adjusted, the degree of light collection and the illuminance can be adjusted to a desired level.

  Further, in the illumination device according to claim 2 of the present invention, as in the invention according to claim 1, it has low heat generation and long life, and at least the tip of the semiconductor element is exposed from the surface of the illumination head. In order to suppress the temperature rise of the lighting head that is easily radiated, the degree of integration and the illuminance can be improved by increasing the degree of integration of the semiconductor light emitting elements.

  In the lighting device according to claim 3 of the present invention, in addition to the effect according to claim 1, various types of illumination devices are provided by including a planar light source capable of increasing the degree of concentration and illuminance while adjusting to a desired level. Therefore, it is possible to improve the user's work efficiency and work environment by securing an appropriate illuminance according to various use applications.

  In the illumination system according to claim 4 of the present invention, the lighting apparatus according to claim 2 or claim 3 can be supplied with electric power without using commercial electric power, which is economical. Further, even when there is a problem in the supply of commercial power such as when a disaster occurs, power is supplied and a light source can be provided. In addition, there is no release of environmental impact substances such as carbon dioxide when power is supplied, and the burden on the environment can be reduced.

  In the lighting system according to claim 5 of the present invention, since the controller constantly or periodically monitors the capacity of the battery and maintains a state suitable for supplying power to the lighting device, there is a possibility that the battery may break down. As a result, labor and cost for battery replacement can be reduced. Therefore, the running cost related to the use of the lighting device can be reduced, and the environmental load can be reduced by reducing the number of times the battery containing hazardous substances is discarded.

Finally, in the lighting system according to claim 6 of the present invention, the DC power charged in the battery is converted into AC voltage having a constant voltage, current, or frequency through the inverter, or variable AC power. Therefore, the lighting device according to claim 2 or 3 can be used when it is attached to or built in an AC100V electrical product, and the versatility of the lighting system is enhanced.
Further, by connecting the lighting device to the controller and the AC100V electrical product to the inverter, these can be used in parallel, and the versatility of the lighting system is enhanced.

  Referring to the drawings with examples, the best mode of the planar light source and the illumination device that can easily improve the light collecting degree and the illuminance by increasing the degree of integration without using a complicated optical system. explain.

FIG. 1 is a conceptual diagram of a planar light source according to an embodiment of the present invention. (In particular, corresponding to claim 1)
The planar light source shown in FIG. 1 arranges LEDs 1 on a substrate 2 in a 6 × 6 matrix form. The LED 1 is fixed by soldering the electrode legs 3a and 3b onto the substrate 2. Although not shown in the figure, a circuit made of a conductive material is printed on the back surface of the substrate 2, and this circuit is connected to a power source via a substrate connector and used for light emission of the LED 1.
FIG. 2 is a configuration diagram of the back surface of the substrate of Example 1 of the planar light source according to the present embodiment. In FIG. 2, 36 LEDs 1 are arranged around the center 4 of the substrate. If the row in the drawing is called the first row from the bottom and the vertical column is called the first column from the left, for example, LED1 arrange | positioned at electrode terminal 8a, 8b will be LED of the 3rd row 1st column.
In the figure, a + sign is attached to one of the electrode terminals, which indicates that the electrode of LED 1 is on the + side.

In FIG. 2, the electrode terminals 8a and 8b of the LED 1 arranged in the above-mentioned third row and first column are arranged in parallel to the column, but the electrode terminal 7a of the LED 1 arranged in the second row and first column. 7b, the electrode terminal 7a is arranged closer to the second row side, and the electrode terminal 7b is arranged closer to the outside of the substrate 2. The same applies to the electrode terminals 6a and 6b of the LED 1 arranged in the first row and first column. In this way, when the LED 1 is bent from the electrode leg toward the substrate center 4 side by shifting the line connecting the plus and minus electrode terminals not parallel to the column or row direction line, the integration degree of the LED 1 is further increased. Can be made.
On the other hand, in the LED 1 arranged in the third column and the fourth column, unlike the arrangement of the electrode terminals in the first column, the row direction lines are all shown in the electrode terminals 9a and 9b and the electrode terminals 10a and 10b. Are arranged in parallel. Furthermore, also in LED1 arrange | positioned at a 5th row | line | column and a 6th row | line | column, except two LED1 in each row | line | column similarly to a 1st row | line and a 2nd row | line | column, between electrode terminals like electrode terminal 11a, 11b The connecting lines are shifted rather than parallel to the row and column direction lines.
In the planar light source in which the LEDs 1 are arranged in this way, the LEDs 1 are arranged in the first, second, fifth, and sixth rows off the center and arranged in the first, second, fifth, and sixth columns off the center. The electrode terminal is arranged so that the LED can be moved closer to the center side by bending the electrode leg. Therefore, the direction of the LEDs arranged in the vicinity of the four corners of the planar light source can be brought closer to the center to improve the light collecting degree and the illuminance.

Next, FIG. 3 shows a configuration diagram of the back surface of the substrate of Example 2 of the planar light source according to the present embodiment. (In particular, it corresponds to claim 2.)
In FIG. 3, as in FIG. 2, the LED terminals arranged in the first, second, fifth, and sixth rows and the LEDs arranged in the first, second, fifth, and sixth columns are electrode legs. The LED is arranged so that it can be moved to the center side by bending. Moreover, the arrangement of the electrode terminals 15a, 15b to 18a, 18b is also performed for the LEDs arranged in the third and fourth rows and arranged in the third and fourth columns, that is, the central four LEDs. Further, the degree of integration can be further increased as compared with the first embodiment shown in FIG. 2 by bending the electrode legs of these LEDs.

The electrode terminal arrangement described in the first and second embodiments will be described in a little more detail with reference to FIG. FIG. 4 is a conceptual diagram for explaining the arrangement of the electrode terminals of the LEDs arranged in a matrix matrix.
Usually, the electrode terminals of the LEDs are arranged in parallel to the LED columns 19 as shown in the electrode terminals 22a and 22b, or arranged in parallel to the LED rows 20, respectively. However, in this case, in the case of the electrode terminals 23 b and 23 c of the LED existing at a position away from the substrate center portion 21, the array direction line 25 in which the electrode direction line connecting the terminals is a line parallel to the LED row 19. The angle θ ₂ formed between the electrode direction line and the center direction line 27 is considerably smaller than the right angle.
On the other hand, when the electrode terminal 23c is shifted to the position of the electrode terminal 23a, the angle θ ₁ formed between the electrode direction line 26, which is a line connecting the electrode terminals 23a and 23b, with the center direction line 27 becomes close to a right angle, Therefore, when the electrode legs of the LED are bent, the LED legs can be integrated closer to the substrate center 21 than in the case of the angle θ ₂ .

Such a thing does not occur only in the LED column 19 but the same applies to the LED row 20 side. That is, θ ₂ formed by the electrode direction line (parallel to the arrangement direction line 28) in the electrode terminals 24b and 24c and the center direction line 30 is formed by the electrode direction line 29 and the center direction line 30 in the electrode terminals 24a and 24b. It is smaller than θ _1, and the LED can be more integrated on the substrate center 21 side when the electrode terminals are arranged like the electrode terminals 24a and 24b.
It should be noted that the degree to which the LED is brought closer to the substrate center portion 21 side can be adjusted to a desired degree by adjusting the degree of bending of the electrode leg by the user, so that a suitable condensing degree and illuminance can be obtained depending on the application. It is good to adjust to.
As described above, in the planar light source that employs the electrode arrangement of the substrate in Example 1 and Example 2, the degree of light collection and the illuminance can be improved or adjusted as described above. There is also a basic effect by mounting the LED 1 which is a semiconductor light emitting element. For example, the life of the light source is very long compared to a halogen lamp or the like, and a power saving design can be achieved. Furthermore, if it is white LED, it can be set as a light source which does not contain an ultraviolet-ray, and since there is little flicker, it can be set as a light source with high safety | security without damaging a user's vision.

Next, the best mode according to the illumination device of the present invention will be described as a third embodiment with reference to FIGS. 5 and 6. FIG. (In particular, it corresponds to claim 3)
FIG. 5 is a front view of the illumination device according to the present embodiment, and FIG. 6 is a side view thereof. The illuminating device in the present embodiment is one in which the planar light source described in FIG. 1 is mounted inside the illumination heads 31a and 31b. The reason why the two illumination heads 31a and 31b are provided on the left and right is to illuminate from the left and right in consideration of the case where a uniform and high illuminance is required for observation of the subject in a microscope, for example.
The illumination heads 31a and 31b are provided with cooling holes 32 for releasing heat generated from the planar light source. The semiconductor light emitting element such as the LED 1 usually has a small amount of heat generation itself, but Joule heat is generated at the electrode leg portion connected to the substrate 2, so it is important to open the cooling hole 32 to dissipate heat. It becomes. Furthermore, by projecting the tip of the LED 1 of the planar light source from the surfaces of the illumination heads 31a and 31b, heat generated by the LED 1 is dissipated and high illuminance is enabled.
In addition, when making the front-end | tip part of LED1 of a planar light source protrude from the surface of illumination head 31a, 31b, the surface of the board | substrate with which LED1 is arranged is arrange | positioned in the back | inner side rather than the surface of illumination head 31a, 31b. The cooling holes 32 can be combined to form a cooling air flow.

Specifically, referring to FIG. 6, when the cooling air flows from the LED 1 side into the illumination head 31a, the surface of the substrate 2 is installed on the back side of the surface 31c of the illumination head 31a. Therefore, the cooling air cools the electrode legs 3a and 3b standing on the surface of the substrate 2 of the LED 1, and then is discharged from the inside of the illumination head 31a to the outside through the cooling hole 32.
The illumination heads 31a and 31b are connected to the housing 33 via flexible rods 34 and rod connectors 35, respectively. Since the flexible rod 34 is a rod having flexibility, the user can bring the illumination heads 31a and 31b closer to the subject, or bring the two illumination heads closer to one place to obtain a higher light collection degree and illuminance. It is also possible to obtain. In addition, it can be placed in a state desired by the user. In addition, since the housing 33 can be arranged in the back of the microscope and the flexible rods 34 and 34 can be turned from the left and right with the microscope interposed therebetween, the illumination heads 31a and 31b can be brought close to the subject. Will not interfere with the user.
Reference numeral 36 in FIG. 5 turns on the lighting heads 31a and 31b with a power switch. Further, whether to turn on either of the left and right illumination heads 31a, 31b is selected by the lever 38 of the left / right changeover switch 37. However, only one or both of the left and right lighting heads can be turned on.
Reference numeral 39 in FIG. 5 can change the resistance value by turning the knob with the variable resistance controller, and can adjust the illuminance.
A power connector 40 shown in FIG. 6 is a connector for securing power from an outlet or the like.

As LED1 in a present Example and previous Examples 1 and 2, not only white LED but various LED, such as blue, red, and green, can be selected. By arranging LEDs of a plurality of colors for each substrate, the planar light source or the illumination heads 31a and 31b can be exchanged depending on the application. This is because the rod connector 35 can be exchanged together with the lighting heads 31 a and 31 b and the flexible rod 34. Alternatively, the rod connector 35 may be installed in the vicinity of the lighting heads 31a and 31b so that the flexible rod 34 is left on the housing 33 side and only the lighting heads 31a and 31b are replaced.
When detecting GFP (Green Fluorescent Protein), which is a protein that emits green fluorescence, it can be realized by mounting blue LEDs having a wavelength of 400 nm to 460 nm on the illumination heads 31a and 31b.
In the present embodiment, an example in which the power supply connector 40 is connected to an external power supply has been described. However, for example, by separately installing a battery for lighting the LED 1 in the housing 33, the external power supply is cut off from the power supply connector 40. It can be used as an illuminating device even in a state where
In the present embodiment, when a planar light source having the electrode terminal arrangement described in the first or second embodiment is employed, an illumination device having a higher concentration and illuminance can be provided. In addition, since the illumination device is equipped with an LED which is a semiconductor light emitting element, the effect of the planar light source described in the first and second embodiments is also exhibited in this embodiment as it is.

  A description of the circuit of this embodiment will be added with reference to FIG. FIG. 7 is a circuit diagram of the illumination device according to the present embodiment. In FIG. 7, the external power supply is connected to the DC power supply device 41 via the power switch 36. An alternating current supplied from an external alternating current power source is converted into a direct current by the DC power supply device 41. The voltage variable board 39a is a board for actually changing the resistance by the variable resistance controller 39 shown in FIGS. The flexible rods 34 and 34 and the lighting heads 31a and 31b are connected to the flexible rods 34 and 34 via the left / right changeover switch 37.

Next, the best mode according to the illumination system of the present invention will be described as a fourth embodiment with reference to FIG. (In particular, this corresponds to claim 4.)
Fig.8 (a) is a system block diagram of the illumination system 45a which concerns on a present Example. In FIG. 8A, the lighting device 42 is connected to a battery 43 that supplies power to the lighting device 42, and a solar panel 44 is connected to the battery 43. During the day, the electric power generated by the solar panel 44 is once charged in the battery 43 and simultaneously supplied to the lighting device 42, or the electric power charged in the battery 43 is provided to the lighting device 42 at night without sunlight. can do.

Next, the number of outputs of the solar panel 44 necessary for generating electric power necessary when the lighting device 42 is assumed to be used for about 4 hours at night will be described.
As in the illumination device described in the third embodiment, the illumination device 42 uses two substrates, and the load when an illuminance of 1,400 Lx is obtained is a voltage of DC 12 V and a current of 0.36 A. When this is lit continuously for 4 hours at night, the power consumption per day is 0.36 A × 4 h = 1.44 Ah. Here, assuming that the effective sunshine duration per day is 5 hours, the number of solar panel outputs necessary to use this lighting device 42 is 1.44 Ah ÷ 5 h = 0.288 A, which is about 0.29 A. However, since power causes a loss in the middle of distribution, the solar panel that outputs 0.57A, which is about twice the number of outputs obtained by the above calculation formula, is considered in the fourth embodiment of the present invention. Such an illumination system 45a can be realized.

Next, the battery capacity required in this case will be described.
The power consumption per day when the lighting device 42 is turned on continuously for 4 hours at night is 1.44 Ah as described above. Assuming that the amount of power added is one power consumption, (1.44 A × 2) + (1.44 A × 2) = 5.76 Ah, and according to the embodiment of the present invention, the battery capacity is about 5.8 Ah or more. 4 can be realized.
In general, the battery is consumed when used in excess of 50% of the output, and the repeated charging cycle is reduced. Therefore, it is preferable that the output of the battery is up to 50%.

Further, the number of outputs of the above-mentioned solar panel is based on the assumption that all the electricity generated by the solar panel 44 is charged to the battery 43 without being consumed by the lighting device 42 during the day. When the lighting device 42 is used, the number of outputs of the solar panel 44 and the capacity of the battery 43 need to be increased according to the amount of power supplied to the lighting device 42.
In FIG. 8A, the case where there is one lighting device 42 connected to the battery 43 has been described as an example, but the number of lighting devices 42 connected to the battery 43 is limited to this number. Instead, a plurality of units may be connected in parallel or in series depending on the capacity of the battery 43 and the output capability of the solar panel 44.

Next, the best mode according to the illumination system of the present invention will be described as a fifth embodiment with reference to FIG. (In particular, it corresponds to claim 5)
FIG. 8B is a system configuration diagram of the illumination system 45b according to the present embodiment. In FIG. 8B, the battery 43 in the lighting system 45b is connected to a controller 46 that suitably controls the charge amount of the battery 43, and the lighting device 42 and the solar panel 44 are connected via the controller 46. It is. The lighting system 45b of the present embodiment is the one in which the controller 46 is provided in the lighting system 45a of the above-described fourth embodiment, and the specifications of the lighting device 42, the battery 43, and the solar panel 44 are the same as those shown in the fourth embodiment. The same. Generally, a charge controller is used as the controller 46 having such an operation.

In the lighting system 45 b of this embodiment, the power generated by the solar panel 44 is charged to the battery 43 via the controller 46, and the power charged to the battery 43 is supplied to the lighting device 42 via the controller 46. .
The controller 46 constantly or periodically monitors the current, voltage, temperature, etc. of the battery 43, and controls the amount of current generated by the solar panel 44 and flowing into the battery 43 based on the data. While preventing overcharge, the amount of electric power supplied from the battery 43 to the lighting device 42 is controlled to prevent overdischarge. Further, it prevents the current charged in the battery 43 from flowing back to the solar panel 44 at night when there is no sunlight.
According to the lighting system 45b having such a power supply system, the possibility and frequency of failure of the battery 43 are reduced, and the life of the battery 43 can be extended compared to the lighting system 45a described in the fourth embodiment. it can. Therefore, there is an advantage that the number of replacements of the battery 43 can be reduced, the running cost of the lighting system 45b can be reduced, and the economy is excellent.

  In FIG. 8B, the case where one lighting device 42 is connected to the controller 46 has been described as an example. However, as in the case of the fourth embodiment, the controller 46 also includes the controller 46. The number of lighting devices 42 to be connected is not limited to this number, and a plurality of lighting devices 42 may be connected in parallel or in series depending on the capacity of the battery 43 and the output capability of the solar panel 44.

Finally, the best mode according to the illumination system of the present invention will be described as a sixth embodiment with reference to FIG. (In particular, it corresponds to claim 6.)
FIG.8 (c) is a system block diagram of the illumination system 45c which concerns on a present Example. As shown in FIG. 8C, the battery 43 in the lighting system 45c is connected to an inverter 47 for converting the voltage, current and frequency to constant or variable AC power. An AC 100V electrical product 48 having a built-in lighting device 42 is connected. The battery 43 is connected to a controller 46 that suitably controls the amount of charge of the battery 43, and the solar panel 44 is connected via the controller 46.

In the lighting system 45c of the present embodiment, the DC power generated by the solar panel 44 is charged to the battery 43 via the controller 46, and the DC current charged to the battery 43 is converted to AC power by the inverter 47. The Further, this AC power is supplied to the AC100V electrical product 48. Then, DC power is supplied to the lighting device 42 that is built in or connected to the AC 100 V electrical product 48. By using the inverter 47, a general AC100V electric product 48 that requires an AC power supply can be used at the same time.
If the lighting device 42, the battery 43, and the solar panel 44 shown in FIG. 8C have the same specifications as those described in the fourth and fifth embodiments, power is also supplied to an AC100V electric product. Therefore, it is necessary to increase the number of outputs of the solar panel 44 and the capacity of the battery 43.

In FIG. 8C, the case where one lighting device 42 is built in or connected to the AC100V electrical product 48 connected to the inverter 47 is described as an example. Similarly to the case, in this embodiment, the number of lighting devices 42 built in or connected to the AC 100V electrical product 48 is not limited to this number, and depends on the capacity of the battery 43 and the output capacity of the solar panel 44. Multiple units may be built in or connected.
Further, by securing sufficient output of the solar panel 44 and the capacity of the battery 43, a plurality of AC100V electric products 48 in which a plurality of lighting devices 42 are built in or connected to the inverter 47 shown in FIG. 8C are connected. May be used.

The illumination system 45c having such a configuration uses, for example, the illumination device according to the present embodiment capable of saving power in the medical equipment field such as an electric chair for treatment provided with an illumination device for dental treatment. In addition, AC power can be supplied to an electric chair or the like while providing a light source with high concentration and high illuminance. Therefore, even in an environment where the power source and the amount of power are limited, such as in a disaster, medical equipment and treatment equipment can be used appropriately in medical institutions and dental care institutions.
In the lighting system 45c of this embodiment, one or more lighting devices 42 are connected to the controller 46 shown in FIG. 8C, and one or more AC100V electric products 48 are connected to the inverter 47. Therefore, it can also be used in parallel with the light source and the AC100V electrical product. In other words, it is possible to use the lighting device with high concentration and high illuminance in parallel with the home electric appliance, and the versatility as a general home lighting system is also improved.

  The planar light source, illumination device, and illumination system according to the present invention realizes a planar light source with high concentration and high illuminance by folding the electrode legs of the LEDs on the substrate and integrating them in the center direction of the substrate. By exposing at least a part of the light emitter of this planar light source to the outside, it is possible to easily dissipate heat, and the illumination device and illumination system having such a configuration have high power consumption and have been short-lived. In the field of apparatus, it is intended to provide a light source with low power consumption, high illuminance and long life. There is a high possibility of use in the field of medical equipment that requires a light source and the field of light sources for general households. In addition, the use of lighting devices equipped with LED light sources that consume less power by connecting with solar panels makes it more effective, so lighting devices and lighting systems in situations where power sources are limited, such as during disasters, and power lines It can also be expected as a lighting device or lighting system in rural areas where facilities are not established.

It is a conceptual diagram of the planar light source which concerns on embodiment of this invention. It is a block diagram of the board | substrate back surface of Example 1 of the planar light source which concerns on this invention. It is a block diagram of the board | substrate back surface of Example 2 of the planar light source which concerns on this invention. It is a conceptual diagram for demonstrating arrangement | positioning of the electrode terminal of LED arranged in matrix matrix form. It is a front view of the illuminating device which concerns on Example 3 of this invention. It is a side view of the illuminating device which concerns on Example 3 of this invention. It is a circuit diagram of the illuminating device which concerns on Example 3 of this invention. (A) It is a system block diagram of the illumination system which concerns on Example 4 of this invention. (B) It is a system configuration | structure figure of the illumination system which concerns on Example 5 of this invention. (C) It is a system configuration | structure figure of the illumination system which concerns on Example 6 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... LED 2 ... Board | substrate 3a, 3b ... Electrode leg 4 ... Board | substrate center part 5 ... Board | substrate connector 6a, 6b-11a, 11b ... Electrode terminal 12 ... Board | substrate 13 ... Board | substrate center part 14 ... Board | substrate connector 15a, 15b-18a, 18b ... Electrode terminal 19 ... LED row 20 ... LED row 21 ... Substrate center part 22a, 22b ... Electrode terminal 23a, 23b, 23c, 24a, 24b, 24c ... Electrode terminal 25 ... Arrangement direction line 26 ... Electrode direction line 27 ... Center direction Line 28 ... Array direction line 29 ... Electrode direction line 30 ... Center direction line 31a, 31b ... Illumination head 32 ... Cooling hole 33 ... Housing 34 ... Flexible rod 35 ... Rod connector 36 ... Power switch 37 ... Left / right changeover switch 38 ... Lever DESCRIPTION OF SYMBOLS 39 ... Variable resistance controller 39a ... Voltage variable board 40 ... Power supply connector 41 ... DC power supply device 42 ... Lighting equipment 43 ... Battery 44 ... solar panels 45 a to 45 c ... illumination system 46 ... controller 47 ... Inverter 48 ... AC100V Electronics

Claims (6)

  In a planar light source configured by arranging a plurality of semiconductor light emitting elements on a substrate in a matrix matrix, a straight line connecting two electrode legs in each of a plurality of semiconductor elements arranged on a row or column is an electrode direction. When a straight line connecting a substantially central part of the plurality of semiconductor light emitting elements arranged in the matrix matrix and a substantially middle part of the two electrode legs is defined as a central direction line, In at least one of the plurality of semiconductor light emitting elements disposed above, a first angle of 90 degrees or less out of two angles formed by the electrode direction line and the central direction line is the array direction. A planar light source characterized by being larger than a second angle of 90 degrees or less among two angles formed by a line and the central direction line.   A planar light source configured by arranging a plurality of semiconductor light emitting elements on a substrate in a matrix matrix, an illumination head that accommodates at least a tip portion of the semiconductor light emitting element of the planar light source exposed from the surface, and the illumination A lighting device comprising: a neck rod connected to a head in a supportable manner; and a housing provided with a switch for suspending the neck rod to turn on the planar light source.   The planar light source according to claim 1, an illumination head that accommodates the planar light source according to claim 1, a neck rod that is connected so as to support the illumination head, And a housing having a switch for lighting the planar light source.   An illumination system comprising: the illumination device according to claim 2 or 3; a battery connected to the illumination device for supplying electric power; and a solar panel connected to the battery for charging.   The lighting system according to claim 4, wherein the battery is connected to the lighting device and the solar panel via a controller that prevents overdischarge and overcharge of the battery.   The lighting system according to claim 4, wherein an inverter is connected to the battery.