JP2012064937A - Led light emitting element and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED light emitting element which reduces the manufacturing man-hours and costs.SOLUTION: An LED light emitting element includes at least one LED chip which emits light by receiving driving current supply and a wiring board which has a recessed part, in which the LED chip is housed and mounted, on the surface side and is provided with a wiring pattern formed for supplying the driving current to the LED chip. Further, an insertion part, which is used for inserting a penetration member when the LED light emitting element is fixed to a counterpart member, is formed on the wiring board.

Description

  The present invention relates to an LED light emitting element using an LED chip that emits light when supplied with a drive current, and an illumination device including the LED light emitting element.

  LED light emitting elements using LED chips have been widely used as light sources for various lighting devices and display devices. In addition, a plurality of LED light emitting elements that employ LED chips having different emission colors, such as a red LED light emitting element, a green LED light emitting element, and a blue LED light emitting element, are combined, and the drive current supplied to each LED light emitting element is adjusted. Thus, Patent Document 1 discloses a light-emitting device that obtains desired white light by synthesizing light emitted from each LED light-emitting element.

  In addition, an LED light emitting element has been developed in which light emitted from an LED chip is emitted after being wavelength-converted by a phosphor, and a light emitting device combining such LED light emitting elements is disclosed in Patent Document 2, for example. . In the light emitting device of Patent Document 2, a blue LED light emitting element that emits blue light using a blue LED chip and a green phosphor that emits green light when excited by the blue light emitted from the blue LED chip are combined with the blue LED chip. A green LED light emitting element and a red LED light emitting element in which a red phosphor that is excited by blue light emitted from a blue LED chip and emits red light is combined with the blue LED chip are used. The blue LED light emitting element, the green LED light emitting element and the red LED light emitting element each ensure excellent color rendering by combining light emitted from each of the blue LED light emitting elements and the light emission color of the light emitting device by adjusting the light output of each light emitting unit. Can be changed in various ways.

  In addition, instead of the light emitting device that obtains white light by combining the light emitted by the blue LED light emitting element, the green LED light emitting element, and the red LED light emitting element, a red phosphor, a green phosphor, and a blue phosphor are mixed. Patent Document 3 discloses a light-emitting device that obtains desired white light by wavelength-converting light emitted from an LED light-emitting element with a formed wavelength conversion member. In this light emitting device, a near-ultraviolet LED chip that emits near-ultraviolet light and a red phosphor, a green phosphor, and a blue phosphor are combined so as to convert the wavelength of the near-ultraviolet light emitted by the near-ultraviolet LED chip into desired white light. A light emitting module is formed by combining the wavelength conversion member.

  In this light emitting module, a truncated cone-shaped reflector is provided on a wiring board, and the inside of the reflector is divided into two regions by a partition member. A plurality of LED chips are arranged for each of the two regions and a wavelength conversion member is provided. The wavelength conversion members in the two regions have different wavelength conversion characteristics, and the color temperature of white light emitted from one wavelength conversion region is different from the color temperature of white light emitted from the other wavelength conversion region. It is like that. A wiring pattern for supplying a driving current to each LED chip is formed on the wiring board, and lands for external connection are formed on the wiring pattern.

JP 2006-4839 A JP 2007-122950 A International Publication No. 2009/063915 Pamphlet

  When the light emitting module configured as described above is used for a lighting device or the like, the light emitting module is mounted on a base substrate by reflow soldering or the like, and the base substrate is mounted on the lighting device side such as a casing or a heat sink of the lighting device. It is fixed to the member. For this reason, two processes of attaching the light emitting module to the base substrate and attaching and fixing the base substrate to a lighting fixture or the like are required. In addition, the members necessary for configuring the lighting fixture and the like also require two members: a wiring board for configuring the light emitting module and a base substrate for mounting the light emitting module. As one measure for reducing the manufacturing cost and component cost of lighting fixtures using LED light-emitting elements, reduction in the number of manufacturing steps and the number of members related to the assembly of such LED light-emitting elements is required.

  This invention is made | formed in view of such a subject, The place made into the objective is to provide the LED light emitting element which can reduce a manufacturing man-hour and component cost.

  In order to achieve the above object, the LED light emitting device of the present invention has at least one LED chip that emits light when supplied with a driving current, and a concave portion in which the LED chip is accommodated and mounted on the surface side, and the LED chip. And a wiring board having a wiring pattern for supplying a driving current to the wiring board, wherein a penetrating member is inserted into the wiring board when the LED light emitting element is fixed to a counterpart member. The insertion part for performing is formed, It is characterized by the above-mentioned.

  According to the LED light emitting element configured as described above, the penetrating member is inserted into the insertion portion formed on the wiring substrate, and the penetrating member is used so that the LED light emitting element holds the LED light emitting element. It is fixed to a counterpart member that is a member.

  In such an LED light emitting element, the penetrating member may be a penetrating mechanical fastening member that mechanically fastens the LED light emitting element to the counterpart member.

  The LED light-emitting element may further include a wavelength conversion member that is accommodated in the recess formed in the wiring board and that converts at least a part of light emitted from the LED chip and emits it. In this case, at least a part of the light emitted from the LED chip accommodated in the recess is wavelength-converted by the wavelength conversion member accommodated in the recess, and the wavelength-converted light is emitted from the wavelength conversion member.

  In such an LED light emitting element, the material of the wiring board may be ceramic.

  In such an LED light emitting element, the wiring pattern may be formed only on the surface side of the wiring board.

  The LED light emitting element may further include an external connection land on the surface side of the wiring board.

  In such an LED light emitting element, the insertion portion formed in the wiring board may be a through-hole penetrating the wiring board.

  Alternatively, the insertion portion formed in the wiring board may be a notch formed in an edge portion of the wiring board.

  As a specific configuration of the LED light emitting element, the recess formed in the wiring board is divided into a first recess and a second recess, and the LED chip is mounted in at least one of the first recesses. You may make it consist of a 1st LED chip and at least 1 2nd LED chip mounted in the said 2nd recessed part.

  As a more specific configuration, the LED light-emitting element is housed in the first recess, and a first wavelength conversion member that converts and radiates at least a part of light emitted from the first LED chip, and the second recess. And a second wavelength conversion member that converts the wavelength of at least a part of the light emitted from the second LED chip and emits it.

  When the LED light emitting element is configured in this way, at least part of the light emitted from the first LED chip accommodated in the first recess is converted by the first wavelength conversion member accommodated in the first recess. Then, the wavelength-converted light is emitted from the first wavelength conversion member. On the other hand, at least a part of the light emitted from the second LED chip accommodated in the second recess is wavelength-converted by the second wavelength conversion member accommodated in the second recess, and the wavelength-converted light is second. Radiated from the wavelength converting member. Then, the light emitted from the first wavelength conversion member and the light emitted from the second wavelength conversion member are combined and emitted from the LED light emitting element.

  More specifically, in such an LED light emitting element, the first wavelength conversion member emits white light having a first color temperature, and the second wavelength conversion member is a second different from the first color temperature. You may make it radiate | emit white light of color temperature.

  In this case, white light having a color temperature between the second color temperature different from the first color temperature is obtained by combining the light emitted from the first wavelength conversion member and the light emitted from the second wavelength conversion member. Is obtained. Further, if only the first LED chip is caused to emit light, white light having the first color temperature can be obtained, and if only the second LED chip is caused to emit light, white light having the second color temperature can be obtained.

  When providing a 1st recessed part and a 2nd recessed part in a wiring board, it is preferable that the opening shape of the said 1st recessed part in the said wiring board and the opening shape of the said 2nd recessed part in the said wiring board are substantially the same. .

  As a specific configuration of the LED light-emitting element, the recess formed in the wiring board is divided into a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are alternately arranged. The LED chip may include a first LED chip mounted in each of the first recesses and a second LED chip mounted in each of the second recesses.

  As a more specific configuration, the LED light-emitting element is accommodated in each of the first recesses, and a first wavelength conversion member that radiates by converting at least a part of light emitted from the first LED chip, and the first A second wavelength conversion member that is accommodated in each of the two recesses and that radiates at least a part of the light emitted from the second LED chip by wavelength conversion may be further provided.

  When the LED light emitting element is configured in this way, at least part of the light emitted from the first LED chip accommodated in each of the plurality of first recesses is the first wavelength accommodated in each of the first recesses. The wavelength is converted by the conversion member, and the wavelength-converted light is emitted from the first wavelength conversion member. On the other hand, at least a part of the light emitted from the second LED chip accommodated in each of the plurality of second recesses is wavelength-converted and wavelength-converted by the second wavelength conversion member accommodated in each of the second recesses. Is emitted from the second wavelength conversion member. Then, the light emitted from the first wavelength conversion member and the light emitted from the second wavelength conversion member are combined and emitted from the LED light emitting element.

  More specifically, in such an LED light emitting element, the first wavelength conversion member emits white light having a first color temperature, and the second wavelength conversion member is a second different from the first color temperature. You may make it radiate | emit white light of color temperature.

  In this case, white light having a color temperature between the second color temperature different from the first color temperature is obtained by combining the light emitted from the first wavelength conversion member and the light emitted from the second wavelength conversion member. Is obtained. Further, if only the first LED chip is caused to emit light, white light having the first color temperature can be obtained, and if only the second LED chip is caused to emit light, white light having the second color temperature can be obtained.

  Also in the case where a plurality of first recesses and a plurality of second recesses are provided on the wiring board, the respective opening shapes of the first recesses in the wiring board and the respective opening shapes of the second recesses in the wiring board Preferably they are substantially the same.

  The wiring board of the LED light emitting element may include a metal terminal member that penetrates the wiring board and is electrically connected to the wiring pattern formed on the wiring board. In this case, wiring with the outside is performed through the metal terminal member.

  Specifically, the metal terminal member may be provided so as to protrude from a surface where the recess is formed in the wiring board, or protrude from a surface opposite to the surface where the recess is formed. It may be provided to do. Or the said metal terminal member may be provided so that it may each protrude from the surface in which the said recessed part was formed in the said wiring board, and the surface on the opposite side.

  The LED light emitting element as described above can be used in a lighting device. In this case, the LED light emitting element is fixed to the lighting device by the penetrating member through the insertion portion.

  In the lighting device described above, the counterpart member to which the LED light emitting element is fixed is a heat radiating member for releasing heat generated by the LED chip into the atmosphere, or transmits heat generated by the LED chip to the heat radiating member. A heat transfer member is preferred.

  According to the LED light emitting element of the present invention, the LED light emitting element can be directly fixed to the mating member using the penetrating member inserted in the insertion portion formed on the wiring board. Accordingly, it is possible to reduce the number of manufacturing steps by using a two-step process of mounting the light emitting module on the base substrate as in the prior art and then fixing the base substrate to the counterpart member as a single process. In addition to this, it is not necessary to provide a base substrate for attaching the LED light emitting element in addition to the wiring substrate, and the number of components can be reduced and the component cost can be reduced.

  Also, since the LED chip is accommodated in the recess provided in the wiring board, it is not necessary to separately prepare a member such as a conventional reflector in order to accommodate the LED chip. And the cost of parts can be reduced. Further, for example, when a wavelength conversion member, an optical lens, or the like is used in combination with an LED chip, the wavelength conversion member, the optical lens, or the like can be easily installed by housing the LED chip in the recess.

  As described above, the LED light-emitting element of the present invention can be easily increased in size as a single light source because of reduced component costs and high thermal conductivity.

  Furthermore, when the wiring pattern is not formed inside the wiring board but only on the surface side of the wiring board, the light emitted from the LED chip is not absorbed inside the wiring board, and the LED The luminance of the light emitting element can be improved.

  In addition, when a penetration type mechanical fastening member that firmly and mechanically fastens the LED light emitting element to the counterpart member is used as the penetration member, the LED light emitting element is not easily detached from the counterpart member. That is, even when an unnecessary force is applied to the LED light emitting element from the outside, the LED light emitting element is not easily detached from the counterpart member.

  Furthermore, since the penetration type mechanical fastening member can firmly fasten and fix the wiring board to the mating member, a fixing member such as an adhesive becomes unnecessary. Therefore, it is not necessary to use a fixing member having low thermal conductivity, and a decrease in thermal conductivity of the LED light emitting element itself is suppressed. Further, since the wiring board can be firmly fastened and fixed to the mating member, the wiring board does not bend and the thermal contact between the wiring board and the mating heat dissipation member / heat transfer member is improved. Thus, the heat generated by the LED chip can be efficiently radiated to the outside through the counterpart member.

  Further, when the concave portion is divided into a first concave portion and a second concave portion, and the first LED chip is mounted in the first concave portion and the second LED chip is mounted in the second concave portion, for example, the first LED chip, It becomes possible to make the second LED chip have different light emission characteristics, or to combine wavelength conversion members having different wavelength conversion characteristics between the first LED chip and the second LED chip.

  In particular, if the recess is divided into a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are alternately arranged, the first LED chip and the second LED chip have different light emission characteristics. When combining wavelength conversion members with different wavelength conversion characteristics between the first LED chip and the second LED chip, the light emitted from each of the two types of LED chips or the two types of wavelength conversion members is excellent. Can be performed.

  More specifically, the first wavelength conversion member that converts the wavelength of at least part of the light emitted from the first LED chip and radiates it is accommodated in the first recess, and at least part of the light emitted from the second LED chip is received. When the 2nd wavelength conversion member radiated | emitted by wavelength conversion is accommodated in the 2nd recessed part, the light which synthesize | combined the light each radiated | emitted from the 1st wavelength conversion member and the 2nd wavelength conversion member can be obtained.

  At this time, as described above, if the recess is divided into a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are alternately arranged, the first wavelength conversion member and When the lights emitted from the second wavelength conversion members are combined, it is possible to perform the combination even better.

  In particular, when the first wavelength conversion member emits white light having a first color temperature and the second wavelength conversion member emits white light having a second color temperature different from the first color temperature, the first color temperature White light having a color temperature up to the second color temperature can be emitted from the LED light emitting element.

  Further, when providing the first concave portion and the second concave portion on the wiring board, if the opening shape of the first concave portion in the wiring substrate is substantially the same as the opening shape of the second concave portion in the wiring substrate, the above-mentioned In this way, it is possible to suppress the shape shift when the two lights are combined and emitted, and to perform the combination well.

  If the temperature of the LED light emitting element rises excessively due to the heat generated by the LED chip, the light emitting characteristics of the LED light emitting element may be deteriorated, or the constituent members including the LED chip may be deteriorated. Therefore, it is necessary to appropriately release the heat generated by the LED chip into the external atmosphere, and a heat dissipation member for that purpose may be used. In such a case, in the LED light emitting element described above, the LED light emitting element can be easily fixed to the heat radiating member itself or the heat conducting member that transfers heat to the heat radiating member by the penetrating member inserted into the insertion portion. In particular, the use of this heat radiating member is effective when the amount of heat generated is increased using a plurality of LED chips.

  When the wiring board of the LED light emitting element has a metal terminal member that penetrates the wiring board and is electrically connected to the wiring pattern formed on the wiring board, wiring is performed to the outside through the metal terminal member. Therefore, it is not necessary to increase the strength of the wiring pattern as compared with the case where an external wiring is directly connected to the wiring pattern, and problems such as deterioration and peeling of the wiring pattern due to secular change can be prevented.

  When this metal terminal member is provided so as to protrude from the surface where the recess is formed in the wiring board, after the LED light emitting element is fixed to the counterpart member, the external wiring can be easily connected to the LED light emitting element. can do. Further, when an optical device such as a lens is combined with the LED light emitting element, the metal terminal member can be used as a spacer.

  On the other hand, when the metal terminal member is provided so as to protrude from the surface opposite to the surface on which the concave portion is formed on the wiring board, for example, if a connector for receiving the metal terminal member is provided on the counterpart member, the counterpart It is possible to simultaneously perform both mounting of the LED light emitting element to the side member and electrical connection.

  When the LED light-emitting element of the present invention is used in a lighting device, the effect of the LED light-emitting element as described above can be obtained in the lighting device.

It is a perspective view which shows the whole structure of the LED light emitting element which concerns on one Embodiment of this invention. It is a top view of the LED light emitting element of FIG. It is sectional drawing of the LED light emitting element which follows the III-III line | wire in FIG. It is a principal part enlarged view of the cross section of the LED light emitting element shown in FIG. It is a circuit diagram which shows the electric circuit structure of the LED light emitting element of FIG. It is a figure which shows an example of the state which attached the LED light emitting element to the other party member in the cross section which follows the VI-VI line in FIG. It is a circuit diagram which shows the modification of the electric circuit structure of a LED light emitting element. It is a circuit diagram which shows the modification of the electric circuit structure of a LED light emitting element. It is a circuit diagram which shows the modification of the electric circuit structure of a LED light emitting element. It is a top view which shows the modification of the wiring board of a LED light emitting element. It is a top view which shows the 1st modification of a LED light emitting element. It is a top view which shows the 2nd modification of an LED light emitting element. It is a top view which shows the 3rd modification of an LED light emitting element. It is a top view which shows the 4th modification of an LED light emitting element. It is sectional drawing of the LED light emitting element which follows the XV-XV line | wire in FIG. It is a circuit diagram which shows the electric circuit structure of the LED light emitting element of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the content demonstrated below, In the range which does not change the summary, it can change arbitrarily and can implement. The drawings used in the following description schematically show the LED light-emitting device according to the present invention, and are partially emphasized, enlarged, reduced, or omitted to deepen the understanding. In some cases, the scale and shape of each constituent member are not accurately represented. Furthermore, the various numerical values used in the following description are merely examples, and can be variously changed as necessary.

<Overall configuration of LED light emitting element>
FIG. 1 is a perspective view showing an overall configuration of an LED light emitting element 1 according to an embodiment of the present invention. 2 is a plan view of the LED light-emitting element 1, and FIG. 3 is a cross-sectional view of the LED light-emitting element 1 along the line III-III in FIG. As shown in FIGS. 1 to 3, in this embodiment, the LED light-emitting element 1 includes a wiring substrate 2 made of an alumina-based ceramic having excellent electrical insulation and good heat dissipation. This wiring board 2 is formed in a square shape with one side of 15 to 20 mm, and has a thickness of 1 to 3 mm. The wiring board 2 is formed with two concave portions, a first concave portion 3 and a second concave portion 4 which are opened in the first surface (front surface) 2a. That is, two recesses, a first recess 3 and a second recess 4, are formed on the surface side of the wiring board 2. The first recess 3 and the second recess 4 are formed so that the opening area and the shape of the first surface 2 a of the wiring board 2 are substantially the same, and the partition wall 2 b that is a part of the wiring board 2 is formed. It is arranged in parallel.

  As shown in FIGS. 1 and 2, four first LED chips 5 are arranged in a line along the partition wall 2 b on the bottom surface of the first recess 3, and on the bottom surface of the second recess 4, Four second LED chips 6 are arranged in a line along the partition wall 2b. Moreover, as shown in FIG.1 and FIG.2, in order to supply drive current to these 1st LED chip 5 and 2nd LED chip 6 only to the 1st surface 2a of the wiring board 2, electroconductivity, such as copper foil, respectively is favorable. A first wiring pattern 7, a second wiring pattern 8, a third wiring pattern 9, and a fourth wiring pattern 10 made of a simple metal are formed. Thus, each wiring pattern is not formed inside the wiring board 2 but is formed only on the surface side of the wiring board 2, so that light emitted from each LED chip is absorbed inside the wiring board 2. Thus, the luminance of the LED light emitting element 1 can be improved.

  Note that the number of the first LED chip 5 and the second LED chip 6 in this embodiment is an example, and can be increased or decreased as necessary. Each of them can be one, and the number of both is the same. It is also possible to make them different. Also, the material of the wiring board 2 is not limited to alumina ceramics, and various materials can be applied. For example, ceramic, resin, glass epoxy, composite resin containing a filler in the resin, etc. A material selected from may be used. Alternatively, in order to improve the light reflectivity on the first surface 2a of the wiring substrate 2 and improve the light emission efficiency of the LED light emitting element 1, white pigments such as alumina powder, silica powder, magnesium oxide, and titanium oxide are included. It is preferable to use a silicone resin. Furthermore, it is possible to improve heat dissipation by using a metal substrate such as a copper substrate or an aluminum substrate. However, in this case, it is necessary to form a wiring pattern on the wiring board with electrical insulation therebetween. Furthermore, each wiring pattern may be formed on a surface other than the front surface side of the wiring substrate 2 (for example, inside, side surface, back surface, etc. of the wiring substrate 2). In such a case, it is preferable to design the shape and location of each wiring pattern so that the light emitted from each LED chip is not absorbed by each wiring pattern.

  The first wiring pattern 7 and the second wiring pattern 8 are provided with external connection lands 7a and 8a for connecting wirings from outside to one end, respectively. That is, the external connection lands 7 a and 8 a are provided on the first surface 2 a of the wiring board 2. On the other hand, the other end sides of the first wiring pattern 7 and the second wiring pattern 8 are extended along the first concave portion 3 with the first concave portion 3 interposed therebetween as shown in FIGS. Further, the third wiring pattern 9 and the fourth wiring pattern 10 are also provided with external connection lands 9a and 10a for connecting wiring from the outside to one end, respectively. That is, the external connection lands 9 a and 10 a are provided on the first surface 2 a of the wiring board 2. On the other hand, the other end sides of the third wiring pattern 9 and the fourth wiring pattern 10 are extended along the second concave portion 4 with the second concave portion 4 interposed therebetween, as shown in FIGS.

  FIG. 4 is an enlarged view of a main part around the first LED chip 5 and the second LED chip 6 in the cross section of the LED light emitting element 1 shown in FIG. 3. As shown in FIG. 4, the first LED chip 5 is bonded to the bottom surface of the first recess 3 via an adhesive 13, and each of the two electrodes on the top surface is changed to a corresponding wiring pattern by wire bonding. It is connected. Specifically, the p electrode of the first LED chip 5 is connected to the first wiring pattern 7 by the metal wire 14, and the n electrode is connected to the second wiring pattern 8 by the metal wire 15. FIG. 4 shows the connection state of one first LED chip 5, but all four first LED chips 5 are connected to the first wiring pattern 7 and the second wiring pattern 8 in the same manner. Accordingly, the four first LED chips 5 are connected in parallel between the first wiring pattern 7 and the second wiring pattern 8 with the same polarity.

  As shown in FIG. 4, the four second LED chips 6 arranged on the bottom surface of the second recess 4 are also bonded to the bottom surface of the second recess 4 via the adhesive 16 in the same manner as the first LED chip 5. At the same time, it is connected to a corresponding wiring pattern by wire bonding. Specifically, the n electrode of the second LED chip 6 is connected to the third wiring pattern 9 by the metal wire 17, and the p electrode is connected to the fourth wiring pattern 10 by the metal wire 18. Accordingly, the four second LED chips 6 are connected in parallel between the third wiring pattern 8 and the fourth wiring pattern 10 with the same polarity.

  The mounting and connection of the first LED chip 5 and the second LED chip 6 are not limited to this, and an appropriate method can be selected according to the type and structure of these LED chips. For example, flip chip mounting may be employed, and the two electrodes on the lower surface of each LED chip may be bonded to a wiring pattern formed on the bottom surface of the first recess 3 or the second recess 4. Alternatively, one electrode on the lower surface of each LED chip is bonded to the wiring pattern formed on the bottom surface of the first recess 3 or the second recess 4, and one electrode on the upper surface of each LED chip is bonded to the first of the wiring substrate 2. You may make it connect to the wiring pattern formed in the surface 2a by wire bonding.

  As shown in FIGS. 3 and 4, in the first recess 3, a first fluorescent member (first wavelength conversion member) 11 that converts part or all of the light emitted by the first LED chip 5 is a first LED. The chip 5 is filled so as to cover it. The first fluorescent member 11 is excited by light emitted from the first LED chip 5 and emits light having a wavelength different from that of light emitted from the first LED chip 5, and the first phosphor 19. And a filler 20 for dispersing and holding. On the other hand, the second recess 4 is filled with a second fluorescent member (second wavelength conversion member) 12 that converts a part or all of the light emitted from the second LED chip 6 so as to cover the second LED chip 6. ing. The second fluorescent member 12 is excited by light emitted from the second LED chip 6 and emits light having a wavelength different from that of the light emitted from the second LED chip 6, and the second phosphor 21. And a filler 22 for dispersing and holding the particles. Next, specific configurations of the first LED chip 5 and the second LED chip 6, and the first fluorescent member 11 and the second fluorescent member 12 will be described in detail.

<LED chip>
The first LED chip 5 and the second LED chip 6 used in this embodiment are both LED chips that emit near-ultraviolet light having a peak wavelength of 405 nm. Specifically, as such an LED chip, a GaN-based LED chip that uses an InGaN semiconductor for a light emitting layer and emits light in the near ultraviolet region is preferable. The types and emission wavelength characteristics of the first LED chip 5 and the second LED chip 6 are not limited to this, and various LED chips can be used as long as the gist of the present invention is not changed. Specifically, an LED chip that emits blue light may be used as an LED chip other than the LED chip that emits near-ultraviolet light. Therefore, in this embodiment, the peak wavelength of the light emitted from the first LED chip 5 and the second LED chip 6 is preferably in the wavelength range of 360 nm to 460 nm, preferably 400 nm to 450 nm.

<Fluorescent member>
In the present embodiment, the first phosphor 19 included in the first fluorescent member 11 and the second phosphor 21 included in the second fluorescent member 12 have different wavelength conversion characteristics. Various combinations of such different wavelength conversion characteristics are possible. In the present embodiment, as the first phosphor 19 and the second phosphor 21, all three kinds of phosphors of a red phosphor, a green phosphor and a blue phosphor are mixed and used.

  The near-ultraviolet light emitted from the four first LED chips 5 is red light and green light by the red phosphor, the green phosphor and the blue phosphor dispersed and held as the first phosphor 19 in the first phosphor member 11, respectively. The white light obtained by combining the red light, the green light and the blue light is emitted from the first fluorescent member 11. The near-ultraviolet light emitted from the second LED chip 6 is red, green, and blue by the red, green, and blue phosphors dispersed and held in the second phosphor member 12 as the second phosphor 21, respectively. The wavelength of the light is converted into blue light, and white light obtained by combining the red light, green light, and blue light is emitted from the second fluorescent member 12. Here, in the first phosphor 19 and the second phosphor 21, the mixing ratio of the phosphors of the red phosphor, the green phosphor and the blue phosphor is changed, and the white light emitted from the first phosphor member 11 is changed. The first color temperature T1 is different from the second color temperature T2 of the white light emitted from the second fluorescent member 12.

  In addition, the 1st fluorescent substance 19 and the 2nd fluorescent substance 21 are not limited to what mixed the above-mentioned red fluorescent substance, green fluorescent substance, and blue fluorescent substance. For example, a blue phosphor and a yellow phosphor may be mixed to form the first phosphor 19 and the second phosphor 21. In this case, near-ultraviolet light emitted from the first LED chip 5 is wavelength-converted into blue light and yellow light by the blue phosphor and the yellow phosphor dispersed and held in the first phosphor member 11 as the first phosphor 19, White light obtained by combining the blue light and the yellow light is emitted from the first fluorescent member 11. Similarly, in the second fluorescent member 12, white light is emitted from the second fluorescent member 12 as the second phosphor 21 converts the wavelength of near-ultraviolet light emitted from the second LED chip 6. Also in this case, the first color temperature T1 of the white light emitted from the first fluorescent member 11 is changed by changing the mixing ratio of the blue phosphor and the yellow phosphor between the first phosphor 19 and the second phosphor 21. And the second color temperature T2 of the white light emitted from the second fluorescent member 12 can be made different.

  Further, the blue phosphor may be used as the first phosphor 19 and the yellow phosphor may be used as the second phosphor 21 without mixing such blue phosphor and yellow phosphor. In this case, near-ultraviolet light emitted from the first LED chip 5 is converted into blue light by the first phosphor 19, and near-ultraviolet light emitted from the second LED chip 6 is converted into yellow light by the second phosphor 21. Converted. Therefore, white light having various color temperatures can be obtained by combining the blue light and the yellow light.

  Instead of such a combination of a blue phosphor and a yellow phosphor, a combination of a red phosphor and a blue-green (cyan) phosphor can be used in the same manner. That is, a red phosphor and a blue-green phosphor may be mixed and used as the first phosphor 19 and the second phosphor 21 by changing the mixing ratio, or the red phosphor may be used as the first phosphor 19. In addition, a blue-green phosphor may be used as the second phosphor 21. As described above, various types of phosphors can be employed for the first phosphor 19 and the second phosphor 21. The light obtained by synthesizing the light emitted from each of the first fluorescent member 11 and the second fluorescent member 12 is not limited to white light, but the color temperature of the emitted light required for the LED light emitting element 1, What is necessary is just to select suitably the kind of the 1st fluorescent substance 19 and the 2nd fluorescent substance 21 according to chromaticity, a brightness | luminance, or saturation. Specific examples of the various phosphors and fillers described above are as follows.

(Red phosphor)
The emission peak wavelength of the red phosphor is usually 570 nm or more, preferably 580 nm or more, more preferably 585 nm or more, and usually 780 nm or less, preferably 700 nm or less, more preferably 680 nm or less. is there. Among them, as red phosphors, for example, (Ca, Sr, Ba) ₂ Si ₅ (N, O) ₈ : Eu, (Ca, Sr, Ba) Si (N, O) ₂ : Eu, (Ca, Sr, Ba) ) AlSi (N, O) ₃ : Eu, (Sr, Ba) ₃ SiO ₅ : Eu, (Ca, Sr) S: Eu, (La, Y) ₂ O ₂ S: Eu, Eu (dibenzoylmethane) ₃ Β-diketone Eu complex such as 1,10-phenanthroline complex, carboxylic acid Eu complex, K ₂ SiF ₆ : Mn is preferable, (Ca, Sr, Ba) ₂ Si ₅ (N, O) ₈ : Eu, (Sr, Ca) AlSi (N, O) ₃ : Eu, (La, Y) ₂ O ₂ S: Eu, K ₂ SiF ₆ : Mn are more preferable.

(Orange phosphor)
Among the red phosphors, those having an emission peak wavelength of 580 nm or more, preferably 590 nm or more and 620 nm or less, preferably 610 nm or less can be suitably used as the orange phosphor. As such an orange phosphor, (Sr, Ba) ₃ SiO ₅ : Eu, (Sr, Ba) ₂ SiO ₄ : Eu, (Ca, Sr, Ba) ₂ Si ₅ (N, O) ₈ : Eu, (Ca, Sr, Ba) AlSi (N, O) ₃ : Ce.

(Green phosphor)
The emission peak wavelength of the green phosphor is usually 500 nm or more, preferably 510 nm or more, more preferably 515 nm or more, and usually less than 550 nm, preferably 542 nm or less, more preferably 535 nm or less. is there. Among them, as the green phosphor, for example, Y ₃ (Al, Ga) ₅ O ₁₂ : Ce, CaSc ₂ O ₄ : Ce, Ca ₃ (Sc, Mg) ₂ Si ₃ O ₁₂ : Ce, (Sr, Ba) ₂ SiO ₄ : Eu, (Si, Al) ₆ (O, N) ₈ : Eu (β-sialon), (Ba, Sr) ₃ Si ₆ O ₁₂ : N ₂ : Eu, SrGa ₂ S ₄ : Eu, BaMgAl ₁₀ O ₁₇ : Eu and Mn are preferable.

(Blue phosphor)
The emission peak wavelength of the blue phosphor is usually 420 nm or more, preferably 430 nm or more, more preferably 440 nm or more, usually less than 500 nm, preferably 490 nm or less, more preferably 480 nm or less, still more preferably 470 nm or less, particularly preferably. Is preferably in the wavelength range of 460 nm or less. Among them, as the blue phosphor, for example, (Ca, Sr, Ba) MgAl ₁₀ O ₁₇ : Eu, (Sr, Ca, Ba, Mg) ₁₀ (PO ₄ ) ₆ (Cl, F) ₂ : Eu, (Ba, Ca , Mg, Sr) ₂ SiO ₄ : Eu, (Ba, Ca, Sr) ₃ MgSi ₂ O ₈ : Eu are preferred, and (Ba, Sr) MgAl ₁₀ O ₁₇ : Eu, (Ca, Sr, Ba) ₁₀ (PO ₄ ) ₆ (Cl, F) ₂ : Eu, Ba ₃ MgSi ₂ O ₈ : Eu are more preferable, and Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu and BaMgAl ₁₀ O ₁₇ : Eu are particularly preferable.

(Yellow phosphor)
The emission peak wavelength of the yellow phosphor is usually 530 nm or more, preferably 540 nm or more, more preferably 550 nm or more, and usually 620 nm or less, preferably 600 nm or less, more preferably 580 nm or less. is there. Among them, as the yellow phosphor, for example, Y ₃ Al ₅ O ₁₂ : Ce, (Y, Gd) ₃ Al ₅ O ₁₂ : Ce, (Sr, Ca, Ba, Mg) ₂ SiO ₄ : Eu, (Ca, Sr) Si ₂ N ₂ O ₂ : Eu, α-sialon, and La ₃ Si ₆ N ₁₁ : Ce are preferable.

(Blue green phosphor)
As the blue-green phosphor, a halophosphate phosphor such as (Ba, Ca, Mg) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ (peak wavelength 483 nm), 2SrO · 0.84P ₂ O ₅ · 0 Phosphate phosphors such as .16B ₂ O ₃ : Eu ²⁺ (peak wavelength 480 nm), silicate phosphors such as Sr ₂ Si ₃ O ₈ .2SrCl ₂ : Eu ²⁺ (peak wavelength 490 nm), BaAl ₈ O ₁₃ : Eu ²⁺ (peak wavelength 480 nm), BaMg ₂ Al ₁₆ O ₂₇ : Eu ²⁺ , Mn ²⁺ (peak wavelengths 450 nm, 515 nm), SrMgAl ₁₀ O ₁₇ : Eu ²⁺ (peak wavelength 480 nm), Aluminate phosphors such as Sr ₄ Al ₁₄ O ₂₅ : Eu ²⁺ (peak wavelength of about 480 nm), oxynitride phosphors such as BaSi ₂ N ₂ O ₂ : Eu ²⁺ (peak wavelength of about 480 nm), etc. There is. Instead of a single type of blue-green phosphor, a plurality of types of blue-green phosphors may be mixed and used, or a blue phosphor and a green phosphor may be mixed as appropriate so that the emitted light is blue-green. It may be made to become.

(Filler)
For the filler 20 for dispersing and holding the first phosphor 19 and the filler 22 for dispersing and holding the second phosphor 21, thermoplastic resin, thermosetting resin, photocurable resin, or the like is used. 5 or a material having sufficient transparency and durability against near-ultraviolet light emitted from the second LED chip 6 is preferably used. Specifically, for example, (meth) acrylic resins such as methyl poly (meth) acrylate, styrene resins such as polystyrene and styrene-acrylonitrile copolymer, polycarbonate resins, polyester resins, phenoxy resins, butyral resins, polyvinyl alcohol, Examples thereof include cellulose resins such as ethyl cellulose, cellulose acetate, and cellulose acetate butyrate, epoxy resins, phenol resins, and silicone resins. Also, inorganic materials such as metal alkoxides, ceramic precursor polymers or solutions containing metal alkoxides by hydrolytic polymerization by a sol-gel method or a combination of these, solidified inorganic materials such as siloxane bonds. The inorganic material and glass which it has can be used.

<Electric circuit configuration of LED light emitting element>
When the first LED chip 5 and the second LED chip 6 are connected to the wiring patterns 7 to 10 of the wiring board 2 as described above, the LED light emitting element 1 in the present embodiment has an electric circuit configuration as shown in FIG. Have In other words, the four first LED chips 5 are connected in parallel between the external connection lands 7a and 8a with the anode as the external connection land 7a side. On the other hand, the four second LED chips 6 are connected in parallel between the external connection lands 9a and 10a, with the anode as the external connection land 9a side. Therefore, in the LED light emitting element 1 of the present embodiment, the first LED chip 5 and the second LED chip 6 are electrically separated, and a drive current can be supplied independently.

  With such an electric circuit configuration, if a drive current is supplied through the external connection lands 7a and 8a so that a forward current flows through the first LED chip 5, the first LED chip 5 emits near-ultraviolet light. As described above, part or all of the near-ultraviolet light is wavelength-converted by the first phosphor 19 dispersedly held in the first fluorescent member 11, and the first fluorescent member 11 has the first color temperature T1. White light is emitted. On the other hand, if a drive current is supplied through the external connection lands 9a and 10a so that a forward current flows through the second LED chip 6, the second LED chip 6 emits near-ultraviolet light. As described above, part or all of the near-ultraviolet light is wavelength-converted by the second phosphor 21 dispersedly held in the second fluorescent member 12, and the second fluorescent member 12 has the second color temperature T2. White light is emitted.

  In such an electric circuit configuration, by controlling the drive current so that only the first LED chip 5 emits light and the second LED chip 6 does not emit light, the first color temperature T1 emitted by the first fluorescent member 11 is reduced. White light is emitted from the LED light emitting element 1. On the other hand, if only the second LED chip 6 is caused to emit light and the first LED chip 5 is not caused to emit light, the white light having the second color temperature T2 emitted by the second fluorescent member 12 is emitted from the LED light emitting element 1. In addition, if each of the first LED chip 5 and the second LED chip 6 is caused to emit light, the white light emitted from the first fluorescent member 11 and the white light emitted from the second fluorescent member 12 are synthesized and obtained. White light is emitted from the LED light emitting element 1. Therefore, by adjusting the drive current supplied to the first LED chip 5 and the drive current supplied to the second LED chip 6, the white color temperature between the first color temperature T1 and the second color temperature T2 is adjusted. Light can be emitted from the LED light emitting element 1.

<Application to lighting equipment>
As described above, the LED light-emitting element 1 of the present embodiment can emit white light whose color temperature can be changed between the first color temperature T1 and the second color temperature T2. Is preferred. Therefore, in such a case, the wiring substrate 2 is provided with two through holes (insertion portions) 23 and 24 in order to fix the LED light emitting element 1 to the lighting device.

  FIG. 6 is a view showing an example of attachment of the LED light-emitting element 1 to the lighting device in a cross section taken along line VI-VI in FIG. Reference numeral 25 in FIG. 6 is a counterpart member that is a member that holds the LED light emitting element 1 when the LED light emitting element 1 is attached, and is a member that constitutes a part of the lighting device. Specifically, in order to release the heat generated by the first LED chip 5 and the second LED chip 6 of the LED light emitting element 1 into the atmosphere, the heat dissipating member provided in the lighting device, or the heat dissipating to such a heat dissipating member. A heat transfer member such as a heat pipe is the counterpart member 25.

  The counterpart member 25 is not limited to these heat radiating members or heat transfer members, and various members can be selected as the counterpart member 25 according to the characteristics and specifications of the LED light emitting element 1 and the lighting device. For example, when a heat radiating member or a heat transfer member is unnecessary, the LED light emitting element 1 may be attached to the casing of the lighting device or the LED light emitting element 1 may be attached to the wiring board on the lighting device side. Moreover, the other party member 25 is not limited to one member of a lighting fixture, If it is a member which comprises the fixture, apparatus, etc. which use the LED light emitting element 1 as a light source, it can attach similarly.

  As shown in FIG. 6, a screw 27, which is an example of a penetrating member, is inserted into the through hole 23 of the wiring board 2 with a washer 26 interposed therebetween. In addition, a screw 29 that is an example of a penetrating member is inserted into the through hole 24 with a washer 28 interposed. The screw 27 and the screw 29 are respectively screwed into the mounting hole 30 and the mounting hole 31 formed in the counterpart member 25, and the screw 27 and the screw 29 are tightened, whereby the LED light emitting element 1 is attached to the counterpart member 25. Installed and fixed. By such fixing, for example, when the counterpart member 25 is a heat radiating member or a heat transfer member, it becomes possible to transfer heat from the LED light emitting element 1 to the counterpart member 25 satisfactorily. The operation can be maintained well. In the case where a plurality of LED chips are used as in the present embodiment, the amount of heat generation may be increased, which is particularly effective.

  Moreover, since the LED light emitting element 1 can be directly fixed to the counterpart member 25 by using screws inserted into the through holes 23 and 24 formed in the wiring board 2, the light emitting module is mounted on the base substrate as in the past. After that, the two-step process of fixing the base substrate to the counterpart member can be made a single process, and the number of manufacturing steps can be reduced. In addition to this, it is not necessary to provide a base substrate for fixing to the mating member 25 in addition to the wiring substrate 2, and the number of components can be reduced and the component cost can be reduced.

  Furthermore, since the wiring board 2 can be directly fixed to the mating member 25 by the screws 27 and 29 which are penetrating members, a fixing member such as an adhesive is not necessary. Therefore, it is not necessary to use a fixing member having low thermal conductivity, the deterioration of the thermal conductivity of the LED light emitting element 1 itself is suppressed, and the heat generated by each LED chip can be efficiently radiated to the outside.

  In this embodiment, since the screw 27 and the screw 29 are used as the penetrating member, the inside of the wiring board 2 can be tightened by the screw 27 and the screw 29. For this reason, when the LED light emitting element 1 is attached to the counterpart member 25, the wiring board 2 is not bent, and the heat generated from each LED chip can be efficiently radiated to the outside of the LED light emitting element 1. .

  The LED light-emitting element 1 of the present embodiment having such an effect can be easily increased in size as a single light source because of reduced component costs and high thermal conductivity.

  Further, the screw 27 and the screw 29 which are penetrating members are penetrating mechanical fastening members that fasten and mechanically fasten the LED light emitting element 1 to the counterpart member 25. The LED light emitting element 1 is not easily detached from the counterpart member 25 by fixing the LED light emitting element 1 to the counterpart member 25 using the screw 27 and the screw 29 which are such penetrating mechanical fastening members. That is, when an unnecessary force is applied to the LED light-emitting element 1 from the outside, the LED light-emitting element 1 is prevented from being easily detached from the counterpart member 25, and the LED light-emitting element 1 is attached to the counterpart member 25. The orientation can be easily changed in the state.

  In the LED light emitting element 1 of the present embodiment, in addition to the above-described effects, the first LED chip 5 and the second LED chip 6 are accommodated in the first recess 3 and the second recess 4 provided in the wiring board 2, respectively. In addition, since it is not necessary to separately prepare a member such as a conventional reflector in order to accommodate these LED chips, it is possible to reduce manufacturing man-hours and component costs. Particularly in the present embodiment, the first fluorescent member 11 and the second fluorescent member 12 are used in combination with the first LED chip 5 and the second LED chip 6, but the first LED chip 5 is in the first concave portion 3 and the second concave portion 4. Since the second LED chip 6 is accommodated, the first fluorescent member 11 and the second fluorescent member 12 can be easily installed.

  In the present embodiment, since the opening shape of the first recess 3 in the wiring substrate 2 and the opening shape of the second recess 4 in the wiring substrate 2 are substantially the same, the first fluorescent member is formed as described above. The compositional deviation can be performed satisfactorily by suppressing the shape shift when the two lights emitted from the first and second fluorescent members 12 are combined. As a result, high quality illumination light can be obtained when the LED light emitting element 1 is used as a light source for an illumination device or the like.

  In the present embodiment, the screw 27 and the screw 29, which are penetrating mechanical fastening members, are used as the penetrating member. However, the penetrating member is not limited to the penetrating mechanical fastening member, and is not a threaded nail. Such a pin-shaped member may be used. Further, the penetrating member is not limited to a conductive member such as a metal, and may be composed of another member such as a semiconductor or a non-conductive member as long as it has a high thermal conductivity and is a hard member. Further, the through-type mechanical fastening member is not limited to a screw, and may be a member such as a bolt and nut, a rivet fastening member, a wedge fastening member, or the like.

<Modification of electrical circuit configuration>
In the present embodiment, as shown in FIG. 5, the electric circuit of the first LED chip 5 connected in parallel with each other and the electric circuit of the second LED chip 6 connected in parallel with each other are completely separated to form the LED light emitting device 1. Although the electric circuit is configured, the electric circuit configuration of the LED light emitting element 1 is not limited to this. Various electrical circuits can be configured by changing the wiring pattern formed on the wiring board 2 as necessary.

  For example, as shown in FIG. 7, the cathode side of the first LED chip 5 and the anode side of the second LED chip 6 may be connected to a common external connection land 32. In this case, the four first LED chips 5 are connected in parallel to each other between the external connection land 33 and the external connection land 32, and the four second LED chips 6 are connected to the external connection land 32, the external connection land 34, and the like. Are connected in parallel with each other. Even in such an electric circuit configuration, the first LED chip 5 and the second LED chip 6 can individually adjust the drive current.

  In the embodiment described above and the modification of FIG. 7, the four first LED chips 5 are connected in parallel to each other, and the four second LED chips 6 are connected in parallel to each other. Instead of this, the four first LED chips 5 may be connected in series and the four second LED chips 6 may be connected in series. 8 and 9 show examples of such an electric circuit configuration. In the example of FIG. 8, the four first LED chips 5 are connected in series between the external connection land 35 and the external connection land 36 with the external connection land 35 serving as an anode-side terminal. Further, between the external connection land 37 and the external connection land 38, the four second LED chips 6 are connected in series with the external connection land 37 serving as an anode-side terminal. Even in such an electric circuit configuration, the electric circuit of the first LED chip 5 and the electric circuit of the second LED chip 6 are completely separated, and the drive current can be adjusted individually.

  On the other hand, in the example of FIG. 9, the external connection land 39 is used in common, and the four first LED chips 5 are provided between the external connection land 40 and the external connection land 39 with the external connection land 40 as an anode side terminal. Connected in series. Further, between the external connection land 39 and the external connection land 41, four second LED chips 6 are connected in series with the external connection land 39 as an anode-side terminal. Even in such an electric circuit configuration, the first LED chip 5 and the second LED chip 6 can individually adjust the drive current.

  7 to 9 all use four first LED chips 5 and four second LED chips 6, but the number of these LED chips is four as in the above embodiment. It is not limited to each, and can be increased or decreased as necessary. Further, the electric circuit that can be configured in the LED light-emitting element 1 is not limited to the above-described embodiment and the examples of FIGS. 7 to 9, and various electric circuits can be configured as necessary. .

<Modification of wiring board>
In the above-described embodiment, the two through holes 23 and 24 are formed in the wiring board 2, and the screws 27 and 29 inserted into the through holes 23 and 24 are used to connect the LED light emitting element to the mating member 25 constituting the lighting fixture or the like. 1 was attached. Instead of these through holes 23 and 24, as shown in FIG. 10, two notches (insertions) 23 ′ and 24 ′ may be formed at the edge of the wiring board 2 ′. Also in this case, the LED light emitting element 1 can be attached to the counterpart member 25 by screws 27 and 29 inserted into the notches 23 ′ and 24 ′, respectively, as in the above-described embodiment. In FIG. 10, the same reference numerals are used for the same members as in the above-described embodiment, and the wiring patterns are omitted. Further, the wiring board 2 ′ is configured similarly to the wiring board 2 in the above-described embodiment except that the notches 23 ′ and 24 ′ are used instead of the through holes 23 and 24.

  The number of through-holes in the above-described embodiment and the number of notches in this modification are not limited to two, but may be only one or may be further increased as necessary. . Further, the shapes of the through holes and the notches are not limited to the shapes adopted in the above-described embodiment and the present modification, and any shape that can insert a screw may be used. Further, the positions of the through holes and the notches can be appropriately changed according to the wiring pattern, the positions of the first recess 3 and the second recess 4, the counterpart member 25, and the like.

<First Modification of LED Light Emitting Element>
In the above-described embodiment, the external connection lands 7a to 10a are formed on the wiring patterns 7 to 10 formed on the wiring board 2, respectively, so as to be connected to the outside. Instead of such a connection method, each of the external connection lands 7a to 10a is provided with a metal pin member (metal terminal member) penetrating the wiring board 2, and is connected to the outside through this pin member. You may do it. FIG. 11 shows a first modification of the LED light emitting element employing such a pin member in a cross section taken along line XI-XI in FIG. 2 in the case of the above-described embodiment. In FIG. 11, the same reference numerals are used for members similar to those in the above-described embodiment.

  As shown in FIG. 11, pin members 42, which are penetrating members that penetrate the wiring board 2, are provided in the external connection lands 7a and the external connection lands 10a, respectively. Moreover, although not shown in FIG. 11, the same pin member 42 is provided also in the external wiring lands 8a and 9a, respectively. Specifically, the pin member 42 has a circular flat plate-shaped flange portion 42a formed at one end thereof, and a tapered portion 42b formed in a tapered shape at the other end side. Note that the shape of the flange portion 42a is not limited to a circular shape, and may be a polygon such as a quadrangle or a hexagon, or may be an ellipse. Further, the shape of the tapered portion 42b is not limited to the shape as shown in FIG. 11, and various shapes can be employed.

  As shown in FIG. 11, the pin members 42 are press-fitted into the fitting holes formed in the wiring board 2 at the positions of the external connection lands 7a and 10a, respectively, from the first surface 2a side, and correspond to the flange portions 42a, respectively. The external connection lands 7a and 10a are fixed to the wiring board 2 in contact with the external connection lands 7a and 10a. Therefore, the taper portion 42 b side of the pin member 42 is in a state of protruding from the second surface 2 c of the wiring board 2. At this time, the flange portion 42a of the pin member 42 provided corresponding to the external connection land 7a is electrically connected to the external connection land 7a, and the pin member 42 provided corresponding to the external connection land 10a. The flange portion 42a is electrically connected to the external connection land 10a.

  In order to make such electrical connection more reliable, soldering, caulking, welding, welding, or crimping to the corresponding external connection lands 7a and 10a is applied to each flange portion 42a. preferable. Similarly to the external connection lands 7a and 10a, the pin members 42 provided in the same manner as the external wiring lands 8a and 9a are also electrically connected to the external wiring lands 8a and 9a, respectively.

  Thus, when the four pin members 42 are provided in each of the external connection lands 7a to 10a, a receiving member such as a connector that receives the four pin members 42 on the mating member 25 to which the LED light emitting elements are attached. By providing the wiring, it is possible to easily connect the wiring from the outside to the LED light emitting element, and it is possible to perform both the mounting of the LED light emitting element to the counterpart member 25 and the electrical connection at the same time. . If the interval between two pin members 42 adjacent to each other among the four pin members 42 is a multiple of 2.54 mm, which is a standard dimension applied to the design of a general wiring board, the counterpart Good consistency with the receiving member of the side member 25 can be ensured.

  Moreover, including the case where the wiring from the outside is directly connected to each of the four pin members 42, the wiring to the outside is directly connected to the wiring pattern by providing the four pin members 42 in each of the external connection lands 7a to 10a. Compared with the case of connection, it is not necessary to increase the strength of the wiring pattern, and problems such as deterioration and peeling of the wiring pattern due to aging can be prevented. Furthermore, since it press-fits into the fitting hole of the wiring board 2 until the flange part 42a of each pin member 42 contacts, variation in the protrusion amount of the pin member 42 from the 2nd surface 2c of the wiring board 2 is suppressed favorably. be able to.

  In addition, although the pin member 42 is inserted into the connector of the mating member 25, the wiring board 2 and the mating member 25 are not fastened firmly and mechanically, but the wiring board 2 and the mating member 25 are simply fixed. It becomes possible to do. That is, the pin member 42 also serves as a penetrating member. However, since the pin member 42 does not firmly and mechanically fasten the wiring board and the counterpart member, the pin member 42 does not correspond to a through-type mechanical fastening member.

  In this modification, the length of any one of the four pin members 42 provided in the external connection lands 7a to 10a may be different from the other three lengths. By doing in this way, the mounting direction of an LED light emitting element can be recognized easily.

<Second Modification of LED Light Emitting Element>
In the first modification described above, the pin member 42 provided on each of the external connection lands 7 a to 10 a protrudes from the second surface 2 c of the wiring board 2, but the first surface 2 a of the wiring board 2. You may make it protrude from. FIG. 12 shows a second modification of the LED light emitting element employing such a pin member 42 ′ in the same cross section as that of the first modification described above. In FIG. 12, the same reference numerals are used for members similar to those in the above-described embodiment.

  As shown in FIG. 12, the external connection land 7a and the external connection land 10a are provided with pin members 42 'penetrating the wiring board 2. Although not shown in FIG. 12, similar pin members 42 'are also provided on the external wiring lands 8a and 9a. Specifically, the pin member 42 ′ is formed with a circular flat plate-like flange portion 42 a ′ at the intermediate portion thereof, and similarly to the pin member 42 of the first modification described above, the first surface 2 a of the wiring board 2. From the side, the flange portion 42a 'is press-fitted into the fitting hole of the external connection land until it abuts against the corresponding external connection land. A tapered portion 42b 'formed in a tapered shape is provided at an end portion of the pin member 42' protruding from the first surface 2a of the wiring board 2.

  At this time, the flange portion 42a ′ of the pin member 42 ′ provided on the external connection land 7a is electrically connected to the external connection land 7a, and the flange portion 42a of the pin member 42 ′ provided on the external connection land 10a. 'Is in a state of being electrically connected to the external connection land 10a. In order to ensure such electrical connection, soldering, caulking, welding, welding, or crimping to the corresponding external connection lands 7a and 10a is applied to each flange portion 42a ′. Is preferred. Similarly to the external connection lands 7a and 10a, the pin member 42 'provided in the same manner as the external wiring lands 8a and 9a is also electrically connected to the external wiring lands 8a and 9a, respectively.

  Note that the shape of the flange portion 42a 'is not limited to a circular shape, and may be a polygon such as a quadrangle or a hexagon, or may be an ellipse. Further, the shape of the tapered portion 42b 'is not limited to the shape shown in FIG. 12, and various shapes can be employed.

  In this way, when the four pin members 42 'are provided in each of the external connection lands 7a to 10a, the connection of the wiring from the outside to the LED light emitting element can be easily performed via the respective pin members 42'. it can. Therefore, in this case as well, it is not necessary to increase the strength of the wiring pattern as compared with the case where the external wiring is directly connected to the wiring pattern, and problems such as deterioration and peeling of the wiring pattern due to secular change can be prevented. . Further, since the press-fitting into the fitting hole of the wiring board 2 is performed until the flange portion 42a ′ of each pin member 42 ′ comes into contact, the variation in the protruding amount of the pin member 42 ′ from the first surface 2a of the wiring board 2 is excellent. Can be suppressed.

  In addition to connecting the wires to the respective tapered portions 42b ′ of the four pin members 42 ′, by inserting the respective tapered portions 42b ′ into various mating members (for example, optical lenses), You may use four pin member 42 'as a penetration member. In such a case, although the wiring board 2 and the counterpart member are not fastened mechanically, the wiring board 2 and the counterpart member can be simply fixed.

  Also in this modification, the length of any one of the four pin members 42a 'provided in the external connection lands 7a to 10a may be different from the other three lengths. By doing in this way, the mounting direction of an LED light emitting element can be recognized easily.

<Third Modification of LED Light Emitting Element>
In the first and second modified examples described above, the pin member provided on each of the external connection lands 7a to 10a protrudes from only one of the first surface 2a and the second surface 2c of the wiring board 2. However, you may make it protrude from both these 1st surface 2a and 2nd surface 2c. Fig. 13 shows a third modification of the LED light emitting element employing such a pin member 42 "in the same cross section as that of the first modification described above. The same code | symbol is used about the member similar to embodiment.

  As shown in FIG. 13, the external connection land 7a and the external connection land 10a are provided with pin members 42 ″ penetrating the wiring board 2. Also, although not shown in FIG. 13, the external wiring land 8a. And 9a are also provided with similar pin members 42 ". Specifically, the pin member 42 ″ is formed with a circular flat plate-like flange portion 42a ″ at an intermediate portion thereof, and the first surface 2a of the wiring board 2 is the same as the pin member 42 of the first modification described above. From the side, the flange portion 42a "is press-fitted into the fitting hole of the external connection land until it abuts the corresponding external connection land. Then, the pin member 42" protruding from the first surface 2a of the wiring board 2 is used. A taper portion 42b ″ formed in a taper shape is provided at the end portion of the pin member 42 ′, and a taper portion formed in a taper shape is provided at the end portion of the pin member 42 ″ projecting from the second surface 2c of the wiring board 2. 42c "is provided.

  At this time, the flange portion 42a ″ of the pin member 42 ″ provided in the external connection land 7a is electrically connected to the external connection land 7a, and the flange of the pin member 42 ″ provided in the external connection land 10a. The part 42a ″ is electrically connected to the external connection land 10a. In order to ensure such electrical connection, soldering, caulking, welding, welding, or crimping to the corresponding external connection lands 7a and 10a is applied to each flange portion 42a ''. The pin members provided in the same manner as the external wiring lands 8a and 9a are also electrically connected to the external wiring lands 8a and 9a, respectively, as in the case of the external connection lands 7a and 10a.

  The shape of the flange portion 42a "is not limited to a circular shape, and may be, for example, a polygon such as a quadrangle or a hexagon, or may be an ellipse. Further, the tapered portions 42b" and 42c. The shape of "" is not limited to the shape as shown in FIG. 13, and various shapes can be adopted.

  In this way, when the four pin members 42 ″ are provided in each of the external connection lands 7a to 10a, the wiring board 2 is connected to the mating member 25 to which the LED light emitting element is attached, as in the first modification described above. By providing a receiving member such as a connector for receiving the pin member 42 ″ projecting from the second surface 2c, it is possible to easily connect the wiring from the outside to the LED light emitting element, and the counterpart member 25 It is possible to simultaneously perform both mounting of the LED light emitting element and electrical connection to the LED. Also in this case, among the four pin members 42 ″, the interval between the two pin members 42 ″ adjacent to each other is a multiple of 2.54 mm, which is a standard dimension applied to a general wiring board design. If it does so, favorable matching with the receiving member of the other party member 25 is securable. Further, by inserting the pin member 42 ″ into the connector of the mating member 25, the wiring board 2 and the mating member 25 can be simply connected to each other although the wiring board 2 and the mating member 25 are not fastened mechanically. Accordingly, the pin member 42 ″ also serves as a penetrating member.

  Similarly to the second modification described above, the wiring from the outside to the LED light emitting element can be directly connected to the pin member 42 ″ protruding from the second surface 2a of the wiring board 2. Further, the wiring board can be connected. It is also possible to directly connect the wiring from the outside to the LED light emitting element to the pin member protruding from the second surface 2c of 2. In any case, when connecting the wiring with the outside directly to the wiring pattern In comparison, it is not necessary to increase the strength of the wiring pattern, and problems such as deterioration and peeling of the wiring pattern due to secular change can be prevented. Further, the wiring board 2 until the flange portion 42a ″ of each pin member 42 ″ contacts. Therefore, variation in the protruding amount of the pin member 42 ″ from the first surface 2a and the second surface 2c of the wiring board 2 can be satisfactorily suppressed.

  In the case of this modification, since the wiring from the outside can be connected to each pin member 42 ″ protruding from the second surface 2c of the wiring board 2 as described above, from the first surface 2a of the wiring board 2 About the part of each pin member 42 '' which protrudes, it is also possible to use it for another purpose. For example, optics for better combining the white light emitted from each of the first fluorescent member 11 and the second fluorescent member 12, and for distributing the white light emitted from the LED light emitting element better. These pin members 42 ″ can be used as a support member that supports the lens 43. That is, these pin members 42 ″ function as penetrating members that fix the optical lens 43 and the wiring board 2.

  That is, as shown by a one-dot chain line in FIG. 13, the optical lens 43 has an incident surface parallel to the first surface 2 a of the wiring board 2. The emitted white light is incident. On the incident surface of the optical lens 43 facing the first surface 2a of the wiring board 2, there is formed a recess into which the tapered portion of each pin member 42 "mounted on the wiring board 2 is fitted. The optical lens 43 can be easily positioned with respect to the wiring board 2.

  In this way, a member for supporting and fixing the optical lens 43 is separately prepared by supporting and fixing the optical lens 43 using the four pin members 42 ″ mounted on the external wiring lands 7a to 10a. Therefore, it is possible to reduce the number of parts and manufacturing man-hours of the LED light emitting element, and by using the optical lens 43, the light distribution and the light synthesis of the LED light emitting element can be improved. It can be.

  Further, also in the present modification, the first LED chip 5 and the first fluorescent member 11 are accommodated in the first recess 3 and the second LED chip 6 and the second fluorescence in the second recess 4 as in the above-described embodiment. Since the member 12 is accommodated, when such an optical lens 43 is provided, the first LED chip 5 and the first fluorescent member 11 as well as the second LED chip 6 and the second fluorescent member 12 are not interfered with each other. The optical lens 43 can be easily arranged at any position.

  In this modification, the case where the optical lens 43 is used in combination with the LED light emitting element has been described as an example. However, in addition to the optical lens 43, a diffusion member for diffusing light emitted from the LED light emitting element, Each pin member 42 "can be similarly used when using various optical devices such as a member for regulating or deflecting the radiation direction.

<Fourth Modification of LED Light Emitting Element>
In the embodiment described above, the first recess 3 and the second recess 4 are formed in the wiring substrate 2 one by one, the first LED chip 5 is accommodated in the first recess 3, and the second LED is accommodated in the second recess 4. Chip 6 was accommodated. However, the number of these recesses is not limited to one, and can be variously changed. Therefore, for example, it is possible to form a single concave portion, accommodate the LED chip in the concave portion, and combine it with the fluorescent member. Here, the case where two each of the first concave portion that accommodates the first LED chip 5 and the second concave portion that accommodates the second LED chip 6 are provided will be described below as a fourth modified example. In addition, while using the same code | symbol about the member similar to the above-mentioned embodiment, the detailed description is abbreviate | omitted.

  FIG. 14 is a plan view of the LED light-emitting element 101 of this modification, and FIG. 15 is a cross-sectional view of the LED light-emitting element 101 taken along line XV-XV in FIG. Also in this modification, the LED light emitting element 101 includes a wiring substrate 102 made of alumina ceramic that has excellent electrical insulation and good heat dissipation. The wiring substrate 102 is formed with two first recesses 103 and 105 that open to the first surface 102a, and two second recesses 104 and 106 that also open to the first surface 102a. . As shown in FIG. 14, the first recesses 103 and 105 and the second recesses 104 and 106 are formed so that the opening area and the shape of the first surface 2a of the wiring board 102 are substantially the same. The first recesses 103 and 105 and the second recesses 104 and 106 are alternately arranged in parallel.

  As shown in FIG. 14, four first LED chips 5 are arranged in a row on the bottom surface of the first recess 103 and the bottom surface of the first recess 105, respectively. In addition, four second LED chips 6 are arranged in a row on the bottom surface of the second recess 104 and the bottom surface of the second recess 106, respectively. Further, as shown in FIG. 14, since a driving current is supplied to the first LED chip 5 and the second LED chip 6 to the first surface 102a of the wiring board 102, a metal having good conductivity such as a copper foil is used. A first wiring pattern 107, a second wiring pattern 108, a third wiring pattern 109, a fourth wiring pattern 110, a fifth wiring pattern 111, and a sixth wiring pattern 112 are formed.

  Note that the number of the first LED chip 5 and the second LED chip 6 in this embodiment is an example, and can be increased or decreased as necessary. Each of them can be one, and the number of both is the same. It is also possible to make them different. Moreover, it is also possible to change the number of the 1st LED chips 5 accommodated by the 1st recessed part 103 and the 1st recessed part 105. FIG. Similarly, it is possible to change the number of second LED chips 6 to be accommodated between the second recess 104 and the second recess 106.

  The material of the wiring board 102 is not limited to alumina ceramic, and various materials can be applied. For example, ceramic, resin, glass epoxy, composite resin containing a filler in the resin, or the like can be selected. The material made may be used. Further, in order to improve the light reflectivity on the first surface 102a of the wiring substrate 102 and improve the light emission efficiency of the LED light emitting device 101, white pigments such as alumina powder, silica powder, magnesium oxide, and titanium oxide are included. It is preferable to use a silicone resin. Furthermore, it is possible to improve heat dissipation by using a metal substrate such as a copper substrate or an aluminum substrate. However, in this case, it is necessary to form a wiring pattern on the wiring board with electrical insulation therebetween.

  As shown in FIG. 14, the first wiring pattern 107 and the second wiring pattern 108 are respectively provided with external connection lands 107a and 108a for connecting wirings from the outside to one end. On the other hand, the other end sides of the first wiring pattern 107 and the second wiring pattern 108 are extended along the first concave portion 103 so as to sandwich the first concave portion 103 as shown in FIG. Further, as shown in FIG. 14, the third wiring pattern 109 and the fourth wiring pattern 110 are also provided with external connection lands 109a and 110a, respectively, for connecting wiring from the outside to one end. On the other hand, the other end sides of the third wiring pattern 109 and the fourth wiring pattern 110 are extended between the second recess 104 and the first recess 105 as shown in FIG. Further, as shown in FIG. 14, the fifth wiring pattern 111 and the sixth wiring pattern 112 are also provided with external connection lands 111a and 112a, respectively, for connecting wiring from the outside to one end. On the other hand, the other end sides of the fifth wiring pattern 111 and the sixth wiring pattern 112 are extended along the second concave portion 106 so as to sandwich the first concave portion 106 as shown in FIG.

  The mounting of the first LED chip 5 in the first recesses 103 and 105 and the mounting of the second LED chip 6 in the second recesses 104 and 106 are performed in the same manner as in the above-described embodiment. The four first LED chips 5 housed in the first recesses 103 are each connected to the first wiring pattern 107 by the wire bonding similar to the above-described embodiment, and the n-electrode is the first electrode. Two wiring patterns 108 are connected. Accordingly, the four first LED chips 5 housed in the first recess 103 are connected in parallel between the first wiring pattern 107 and the second wiring pattern 108 with the same polarity.

  The four first LED chips 5 accommodated in the first recess 105 are connected to the fourth wiring pattern 110 by the wire bonding similar to the above-described embodiment, and the n electrode is the first electrode. 5 are connected to the wiring pattern 111. Accordingly, the four first LED chips 5 housed in the first recess 105 are connected in parallel between the fourth wiring pattern 110 and the fifth wiring pattern 111 with the same polarity.

  On the other hand, each of the four second LED chips 6 housed in the second recess 104 is connected to the second wiring pattern 108 by the wire bonding similar to the above-described embodiment, and the n electrode is the first electrode. Three wiring patterns 109 are connected. Therefore, the four second LED chips 6 accommodated in the second recess 104 are connected in parallel between the second wiring pattern 108 and the third wiring pattern 109 with the same polarity.

  In addition, the four second LED chips 6 housed in the second recess 106 are each connected to the fifth wiring pattern 111 by the wire bonding similar to the above-described embodiment, and the n electrode is the first electrode. 6 wiring patterns 112 are connected. Accordingly, the four second LED chips 6 accommodated in the second recess 106 are connected in parallel between the fifth wiring pattern 111 and the sixth wiring pattern 112 with the same polarity.

  In the present modification as well, the mounting and connection of the first LED chip 5 and the second LED chip 6 are not limited to this, and according to the type and structure of these LED chips, as in the previous embodiment. It is possible to select an appropriate method.

  As shown in FIG. 15, in the first concave portion 103 and the first concave portion 105, a part or all of the near-ultraviolet light emitted from the first LED chip 5 has a wavelength similar to that used in the above-described embodiment. A first fluorescent member 11 that converts and emits white light having the first color temperature T <b> 1 is filled so as to cover the first LED chip 5. On the other hand, in the second concave portion 104 and the second concave portion 106, as in the case of the above-described embodiment, a part or all of the near-ultraviolet light emitted from the second LED chip 6 is wavelength-converted to be second. A second fluorescent member 12 that emits white light having a color temperature T <b> 2 is filled so as to cover the second LED chip 6.

  When the first LED chip 5 and the second LED chip 6 are connected to the wiring patterns 107 to 112 of the wiring board 102 as described above, the LED light-emitting element 101 in this modification has an electric circuit configuration as shown in FIG. Have That is, the four first LED chips 5 accommodated in the first recess 103 are connected in parallel between the external connection lands 107a and 108a with the anode as the external connection land 107a side. On the other hand, the four second LED chips 6 accommodated in the second recess 104 are connected in parallel with each other between the external connection lands 108a and 109a with the anode as the external connection land 108a side. Accordingly, the first LED chip 5 and the second LED chip 6 can share the external connection land 108a and supply a drive current separately.

  Further, the four first LED chips 5 housed in the first recess 105 are connected in parallel between the external connection lands 110a and 111a with the anode as the external connection land 110a side. On the other hand, the four second LED chips 6 housed in the second recess 106 are connected in parallel between the external connection lands 111a and 112a, with the anode as the external connection land 111a side. Accordingly, the first LED chip 5 and the second LED chip 6 can share the external connection land 111a and supply a drive current separately.

  Further, the first set of the first LED chip 5 housed in the first recess 103 and the second LED chip 6 housed in the second recess 104 is the first LED chip 5 housed in the first recess 105. And the second LED chip 6 accommodated in the second recess 106 can be supplied with drive current in a state of being electrically separated from the second set. Accordingly, the first set and the second set may be connected in parallel or may be supplied with drive currents completely separately.

  For example, when the first set and the second set are connected in parallel, that is, the external connection land 107a is connected to the external connection land 110a, the external connection land 108a is connected to the external connection land 111a, and the external connection land 109a. Are connected to the external connection lands 112a, respectively, and the drive current supplied to the eight first LED chips 5 and the drive current supplied to the eight second LED chips 6 are adjusted respectively. Similarly, white light that can be adjusted to a color temperature between the first color temperature T1 and the second color temperature T2 can be emitted from the LED light emitting element 101.

  Particularly in this modification, the first recesses 103 and 105 in which the first LED chip 5 and the first fluorescent member 11 are accommodated, and the second recesses 104 and 106 in which the second LED chip 6 and the second fluorescent member 12 are accommodated. Since they are alternately arranged, the white light of the first color temperature T1 emitted from the first fluorescent member 11 and the white light of the second color temperature T2 emitted from the second fluorescent member 12 are better combined. Can be done.

  Further, in this modification, the opening shapes of the first recesses 103 and 105 and the second recesses 104 and 106 in the wiring substrate 102 are substantially the same, and thus the first fluorescent member 11 and the second fluorescent member 11 as described above. The compositional shift can be performed satisfactorily by suppressing the shape shift when the two lights emitted from each of the members 12 are combined.

  Note that the electrical circuit configuration in the case of using the two first recesses 103 and 105 and the two second recesses 104 and 106 as in the present modification is not limited to the electrical circuit configuration in FIG. It is possible to change to In addition, the first fluorescent member 11 is accommodated in the two first recesses 103 and 105 and the second fluorescent member 12 is accommodated in the two second recesses 104 and 106, but is accommodated in these four recesses. It is also possible to make all the fluorescent members different.

  Also in this modification, four through-holes (insertion portions) 113, 114, 115, and 116 are attached to the wiring board 102 in order to attach the LED light emitting element 101 to a mating member that is one of constituent members such as a lighting fixture. Is provided. As in the above-described embodiment, the heat radiation provided in the lighting device or the like for releasing the heat generated by the members constituting the lighting fixture, for example, the first LED chip 5 and the second LED chip 6 of the LED light emitting element 101 into the atmosphere. The member, or a heat transfer member such as a heat pipe that transfers heat to such a heat radiating member, is the counterpart member.

  As in the above-described embodiment, the LED light emitting element 101 is formed by screwing and tightening a penetrating member (for example, a screw that is a penetrating mechanical fastening member) inserted into the through holes 113 to 116 with a mating member. It is attached and fixed to the mating member. In the present modification, since the two first recesses 103 and 105 and the two second recesses 104 and 106 are formed in the wiring board 102, the wiring board 102 is larger than the wiring board 2 of the above-described embodiment. Is used. Thus, by providing the four through holes 113 to 116 in this way, the LED light emitting element 101 is securely attached to the counterpart member. The counterpart member is not limited to one member of the lighting fixture, and can be similarly attached as long as it is a member constituting an appliance or apparatus that uses the LED light emitting element 101 as a light source. Further, the fixing of the LED light emitting element 101 and the counterpart member is not limited to a screw that is a through-type mechanical fastening member. For example, through-type mechanical fastening such as a bolt and nut, a rivet fastening member, a wedge fastening member, or the like. It may be performed by using a member.

  Also in this modification, by such fixing, for example, when the counterpart member is a heat radiating member or a heat transfer member, it is possible to transfer heat well from the LED light emitting element 101 to the counterpart member. The operation of the light emitting element 101 can be maintained satisfactorily. In this modification, since more LED chips are used than in the above-described embodiment, the amount of generated heat may be increased, which is particularly effective.

  Also in this modified example, the LED light emitting element 101 can be directly fixed to the counterpart member using screws inserted into the four through holes 113 to 116 formed in the wiring board 102, so that it is conventional. In addition, after the light emitting module is mounted on the base substrate, the two-step process of fixing the base substrate to the counterpart member can be made a single step, and the number of manufacturing steps can be reduced. In addition to this, it is not necessary to provide a base substrate for fixing to the mating member in addition to the wiring substrate 102, and the number of components can be reduced and the component cost can be reduced.

  In this modified example, notches formed at the edge of the wiring board 102 may be employed instead of the through holes 113 to 116 as in the modified example of FIG. 10 described above. Also, the number of through holes is not limited to four, and can be increased or decreased as necessary.

  Although the description of the LED light emitting element according to one embodiment of the present invention is finished as above, the present invention is not limited to the above-described embodiment and each modification. For example, the wiring boards used in the above-described embodiments and modifications are all square, but it is also possible to adopt shapes other than squares. That is, various shapes such as a rectangle, a circle, a hexagon, and an ellipse can be adopted according to the characteristics of the LED light-emitting element and the surrounding conditions when the LED light-emitting element is used.

  In the above-described embodiment and each modified example, the first LED chip 5 and the first fluorescent member 11 are used in combination, and the second LED chip 6 and the second fluorescent member 12 are used in combination. The fluorescent member may be omitted, and the light emitted from the first LED chip 5 and the second LED chip 6 may be emitted from the LED light emitting element. In this case, for example, if an LED chip that emits blue light is used as the first LED chip 5 and an LED chip that emits yellow light is used as the second LED chip 6, the light emitted by the first LED chip 5 and the second LED chip 6 is synthesized. Thus, white light can be emitted from the LED light emitting element. Further, instead of these combinations, for example, an LED chip that emits red light is used as the first LED chip 5, and an LED chip that emits blue-green light is used as the second LED chip 6. Can emit white light.

  Further, in addition to the first recess and the second recess, a third recess is provided in the wiring board, the first recess accommodates an LED chip that emits red light, and the second recess accommodates an LED chip that emits green light. The third recess may contain an LED chip that emits blue light. In this case, by combining the red light, the green light and the blue light emitted from the respective LED chips, it is possible to obtain radiated light of various colors in addition to white light of various color temperatures.

  On the other hand, in the case of using a combination of fluorescent members, as described above, LED chips that emit light other than near ultraviolet light may be used as the first LED chip 5 and the second LED chip 6. For example, an LED chip that emits blue light may be used as the first LED chip 5 and the second LED chip 6. In this case, a red phosphor that converts the wavelength of blue light to emit red light and a green phosphor that converts the wavelength of blue light to emit green light are mixed, and the first phosphor 19 and the second phosphor 21 may be used.

  By adopting such a combination, in the first fluorescent member 11, white light is synthesized by combining the blue light emitted from the first LED chip 5 with the red light emitted from the red phosphor and the green light emitted from the green phosphor. Can be obtained. In the second fluorescent member 12 as well, white light can be obtained by combining the blue light emitted from the second LED chip 6 with the red light emitted from the red phosphor and the green light emitted from the green phosphor. . Therefore, by changing the mixing ratio of the red phosphor and the green phosphor between the first fluorescent member 11 and the second fluorescent member 12, the first fluorescent member 11 and the second fluorescent member are similar to the above-described embodiment. 12 can emit white light having a different color temperature.

  In the above-described embodiment and modification, the first fluorescent member 11 and the second fluorescent member 12 are each made substantially the same in the opening shape of the first recess and the second recess in the wiring board. Although the synthesis of the emitted light is performed well, when the good synthesis of light is not so important, the opening shape of the first recess and the opening shape of the second recess in the wiring board are different. It is also possible to do.

DESCRIPTION OF SYMBOLS 1,101 LED light emitting element 2,2 ', 102 Wiring board 3,103,105 1st recessed part 4,104,106 2nd recessed part 5 1st LED chip 6 2nd LED chip 11 1st fluorescence member (1st wavelength conversion member)
12 Second fluorescent member (second wavelength conversion member)
23, 24, 113, 114, 115, 116 Through hole (insertion part)
23 ', 24' Notch (insertion part)
27, 29 Screw (penetrating member, penetrating mechanical fastening member)
42, 42 ', 42 "pin member (metal terminal member, penetrating member)

Claims (22)

At least one LED chip that emits light by supplying a driving current;
A LED light emitting device comprising: a concave portion on the surface side where the LED chip is accommodated and mounted; and a wiring substrate on which a wiring pattern for supplying a driving current to the LED chip is formed,
An LED light emitting element, wherein an insertion portion for inserting a penetrating member when the LED light emitting element is fixed to a counterpart member is formed on the wiring board.   The LED light-emitting element according to claim 1, wherein the penetrating member is a penetrating mechanical fastening member that mechanically fastens the LED light-emitting element to the counterpart member.   3. The wavelength conversion member according to claim 1, further comprising a wavelength conversion member that is accommodated in the recess formed in the wiring board and that radiates by converting at least a part of light emitted from the LED chip. LED light emitting element.   The LED light-emitting element according to claim 1, wherein a material of the wiring board is ceramic.   The LED light-emitting element according to claim 1, wherein the wiring pattern is formed only on a surface side of the wiring board.   The LED light-emitting element according to claim 1, further comprising an external connection land on the surface side of the wiring board.   The LED light-emitting element according to claim 1, wherein the insertion portion formed in the wiring board is a through-hole penetrating the wiring board.   The LED light-emitting element according to claim 1, wherein the insertion portion formed in the wiring board is a notch formed in an edge portion of the wiring board. The recess formed in the wiring board is divided into a first recess and a second recess,
The LED chip includes at least one first LED chip mounted in the first recess and at least one second LED chip mounted in the second recess. The LED light emitting element of any one of -8. A first wavelength conversion member that is accommodated in the first recess and radiates by converting at least a part of the light emitted by the first LED chip; and
10. The LED light emitting device according to claim 9, further comprising: a second wavelength conversion member that is accommodated in the second concave portion and that converts the wavelength of at least part of the light emitted from the second LED chip and emits the light. .   The first wavelength conversion member emits white light having a first color temperature, and the second wavelength conversion member emits white light having a second color temperature different from the first color temperature. Item 11. The LED light-emitting device according to Item 10.   12. The opening shape of the first recess in the wiring board and the opening shape of the second recess in the wiring board are substantially the same. 12. LED light emitting element. The recess formed in the wiring board is divided into a plurality of first recesses and a plurality of second recesses, and the first recesses and the second recesses are alternately arranged,
The LED according to claim 1, wherein the LED chip includes a first LED chip mounted in each of the first recesses and a second LED chip mounted in each of the second recesses. Light emitting element. A first wavelength conversion member that is accommodated in each of the first recesses and that converts the wavelength of at least part of the light emitted by the first LED chip and radiates the light;
14. The LED according to claim 13, further comprising: a second wavelength conversion member that is accommodated in each of the second recesses and that converts the wavelength of at least part of the light emitted from the second LED chip and emits the light. Light emitting element.   The first wavelength conversion member emits white light having a first color temperature, and the second wavelength conversion member emits white light having a second color temperature different from the first color temperature. Item 15. The LED light-emitting device according to Item 14.   The opening shape of each of the first recesses in the wiring board and the opening shape of each of the second recesses in the wiring board are substantially the same. LED light emitting element of claim | item.   The LED light emitting device according to claim 1, wherein the wiring board includes a metal terminal member that penetrates the wiring board and is electrically connected to the wiring pattern formed on the wiring board. element.   The LED light emitting element according to claim 17, wherein the metal terminal member is provided so as to protrude from a surface of the wiring board on which the concave portion is formed.   18. The LED light emitting element according to claim 17, wherein the metal terminal member is provided so as to protrude from a surface of the wiring board opposite to the surface on which the concave portion is formed.   The LED light-emitting element according to claim 17, wherein the metal terminal member is provided so as to protrude from a surface of the wiring board on which the concave portion is formed and a surface on the opposite side.   The LED light emitting element in any one of Claims 1-20 is being fixed by the said penetration member via the said insertion part, The illuminating device characterized by the above-mentioned.   The counterpart member is a heat radiating member for releasing heat generated by the LED chip into the atmosphere, or a heat transfer member for transmitting heat generated by the LED chip to the heat radiating member. The lighting device according to claim 21.