JP2011113850A - Light source device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device capable of prevention of malfunction due to incorrect connection between a module equipped with a semiconductor light-emitting element and another circuit, and of heat dissipation high in reliability. <P>SOLUTION: The light source device includes: a base board 3 fixed to the light source device 100 body; the semiconductor light-emitting element 2 installed at the base board 3 by facing a light-emitting face toward the body side; a semiconductor light-emitting module 1 which has a plurality of male terminals 4, 5 juxtaposed on the base board 3 to supply a current to the semiconductor light-emitting element 2; a plurality of female terminals 7, 8 respectively corresponding to the plurality of male terminals 4, 5; a control circuit 9 to control light emission of the semiconductor light-emitting element 2; holes 10 for fixation for the purpose of fixation to the main body; and a printed circuit board 6 having a connector 12 in order to receive power source supply. The holes 10 for fixation are formed at positions asymmetrical with respect to an inter-terminal center line 41 which passes through the center of a juxtaposition width of the plurality of male terminals 4, 5, and is parallel to an insertion/extraction direction of the plurality of male terminals 4, 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a light source device, and more particularly, to a light source device that projects an image by transmitting or reflecting light emitted from a semiconductor light emitting element such as an LED or a semiconductor laser to a light valve such as liquid crystal or DMD (Digital Mirror Device). .

  In a conventional light source device, a light emitting body such as an LED is provided on a substrate on which an energization pattern is formed, and a male terminal is provided on the substrate for supplying current from the external circuit such as a power supply circuit to the light emitting body via the energization pattern. There is an LED module that is electrically connected by inserting and pressing the male terminal of the LED module and a female terminal provided at the tip of a cable drawn from an external circuit. (For example, refer to Patent Document 1).

  In addition, since the heat generated by light emission increases as the luminance of the illuminant increases, there is a heat dissipating means using a liquid forced circulation method as a means for dissipating such heat (see, for example, Patent Document 2).

JP 2003-243712 A JP 2008-89917 A

  In Patent Document 1, there is a possibility that the male terminal of the LED module and the female terminal provided at the tip of the cable may be erroneously connected to each other, and it is determined as a defective product in the inspection process after the terminal connection. There is a problem that a loss of time for reassembly occurs or there is a concern that the light emitter is damaged due to a connection error. In addition, a method of distinguishing by coloring each of the male terminal and female terminal is generally known, but as long as it is possible to physically connect both terminals, it is possible to prevent connection errors. Is impossible and challenges remain.

  Further, in Patent Document 1, in order to dissipate the heat generated by the light emission of the light emitter, there is generally a configuration in which a heat sink is provided on the back side of the LED module. However, during assembly work, parts replacement, or transportation The cable that is connected to the LED module and the heat sink rub against each other due to vibrations that occur when the cable is damaged, causing damage to the cable sheath and short-circuit failure of the board that supplies a large current to the cable. . Further, when the air cooling fan is attached to the heat sink, there is a concern that the cable may be broken by the impeller of the air cooling fan that rotates at high speed.

  As a countermeasure against the problem caused by the above heat dissipation method, there is a liquid forced circulation method described in Patent Document 2. However, if the connection between the flexible rubber hose that circulates the liquid and the radiator is incomplete, the liquid leaks from the connection part and the cooling capacity is reduced, or the leaked liquid is damaged by the electronic parts. There was a problem with reliability.

  The present invention has been made to solve these problems, and prevents defects caused by incorrect connection between a module having a semiconductor light-emitting element and other circuits, and enables reliable heat dissipation. An object is to provide a light source device.

  In order to solve the above-described problems, a light source device according to the present invention includes a base fixed to a light source device main body, a semiconductor light emitting element provided on the base with a light emitting surface facing the main body, and a base mounted side by side. And a plurality of first connection terminals that supply current to the semiconductor light emitting element, a plurality of second connection terminals corresponding to each of the plurality of first connection terminals, and light emission of the semiconductor light emitting element And a printed circuit board having a third connection terminal for receiving power supply, and the fixing hole includes a plurality of first connection terminals. It is characterized by being formed at an asymmetrical position with respect to the center line between terminals passing through the center of the parallel width and parallel to the insertion / extraction direction of the plurality of first connection terminals.

  According to the present invention, the fixing hole passes through the center of the parallel width of the plurality of first connection terminals and is asymmetric with respect to the center line between the terminals parallel to the insertion / extraction direction of the plurality of first connection terminals. Therefore, it is possible to prevent a malfunction caused by a connection error between the module including the semiconductor light emitting element and another circuit and to dissipate heat with high reliability.

It is a top view of the light source device by embodiment of this invention. FIG. 2 is a side view of the light source device as viewed from the direction of arrow II in FIG. 1 according to the embodiment of the present invention. It is a top view which shows the principal part of the structure inside the light source device by embodiment of this invention. 3 is a side view of a light source device when the printed circuit board of FIG. 2 according to an embodiment of the present invention is reversely connected to a semiconductor light emitting module. FIG. It is a side view of the light source device when it sees from the arrow V direction of FIG. 1 by embodiment of this invention. It is a side view of the light source device when it sees from the arrow VI direction of FIG. 1 by embodiment of this invention. It is a block diagram of the light source device by embodiment of this invention. It is a perspective view which shows the structure of the LED module by a prerequisite technique. It is a top view which shows the principal part of the video display apparatus by a prerequisite technique.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the technology that is the premise of the present invention will be described.

  FIG. 8 is a perspective view showing a configuration of an LED module according to the base technology (Patent Document 1). As shown in FIG. 8, the LED module 50 is provided with a plurality of light emitters 51 (LEDs) on a substrate 52 on which an energization pattern is printed, and a plurality of male terminals 53r, 53g, 53b, 54 with respect to the energization pattern. Is soldered. A plurality of female terminals 56r, 56g, 56b, and 57 are provided at the ends of the plurality of cables 55 drawn from a power supply circuit (not shown). A plurality of female terminals 56r, 56g, 56b, and 57 are electrically connected by being inserted and pressed so as to correspond to the plurality of male terminals 53r, 53g, 53b, and 54. With this configuration, the current output from the power supply circuit or the like emits light via the cable 55, the female terminals 56r, 56g, 56b, 57, the male terminals 53r, 53g, 53b, 54, and the energization pattern. The light emitter 51 emits light.

  The light emitter 51 that is an LED may not emit light even if a current is supplied with the positive potential and the negative potential reversed, or the light emitter 51 may be damaged. Therefore, it is necessary to supply a current having a correct potential to the light emitter 51. However, in the configuration shown in FIG. 8, the plurality of male terminals 53r, 53g, 53b, and 54 and the plurality of female terminals 56r, 56g, 56b, and 57 have the same shape. There is a high possibility that any of the female terminals 56r, 56g, and 56b that supply the positive potential to the power male terminal 54 by mistake is connected. Therefore, if the light source device is assembled while the connection between the male terminal and the female terminal is wrong, it will be determined as a defective product in the inspection process after assembly, and it will take time to reassemble, or the light emitter 51 may be damaged. Thus, the high cost of using spare assembly components becomes a problem.

  As a countermeasure for such a problem, a method is generally known in which the positive side and the negative side of the cable are color-coded by red and black, respectively, in order to facilitate the distinction between the positive potential and the negative potential of the cable. Yes. However, even if the male terminal of the semiconductor light source module (LED module) is colored, it is impossible to prevent a connection error as long as the male terminal and the female terminal can be physically connected. . In addition, when a semiconductor light source module that has become a product in the market is not lit due to a life or sudden failure, the maintenance service representative will replace the semiconductor light source module and turn off again if the connection is incorrect. And may lose customer trust. In addition, when replacing at night, there is a problem that even if a flashlight is used, the brightness is insufficient and the color of the cable or terminal cannot be clearly identified.

  Moreover, since the brightness | luminance falls by the heat_generation | fever of a light-emitting body, the semiconductor light source module used for a light source device is generally provided with the heat radiating means. For example, when a heat sink (not shown) having a larger area than the substrate 52 is provided on the back surface of the LED module 50 as a heat dissipating means for the LED module 50 shown in FIG. The heat sink and the cable 55 are rubbed due to shaking during work, replacement, or transportation, and the cover of the cable 55 is torn, causing a short circuit failure in the drive board that supplies a large current to the LED module 50. Is concerned.

  As a countermeasure against such a problem, there is a heat dissipation method using a liquid forced circulation method based on the base technology (Patent Document 2) shown in FIG. In this method, as shown in FIG. 9, the area of the jacket 62 provided on the opposite side of the base 61 from the semiconductor light emitting element 60 is made as small as possible, and the distance (space) between the cable 66 and the jacket 62 is increased. Yes. Further, a large radiator 63 (heat radiating plate) and a large air cooling fan 65 are provided at a position away from the cable 66, and the liquid is circulated in a flexible rubber hose 64 that connects the radiator 63 and each jacket 62. Thus, the circulating liquid that has been absorbed by each jacket 62 and has reached a high temperature is dissipated using the radiator 63 and the air cooling fan 65. However, if the connection between the rubber hose 64 and the radiator 63 is incomplete, the liquid leaks from the connecting portion and the cooling capacity is reduced, or the leaked liquid falls on the electronic component and breaks down. was there.

  The present invention has been made to solve these problems, and will be described in detail below.

<Embodiment>
FIG. 1 is a plan view of a light source device 100 according to an embodiment of the present invention. As shown in FIG. 1, the right side of the alternate long and short dash line shows the appearance of the light source device 100, and the left side of the alternate long and short dash line shows a cross-sectional view inside the light source device 100 (cross-sectional view in the depth direction on the paper). The light source device 100 according to the present embodiment includes a semiconductor light emitting element 2b that emits blue light (arrow II side), a semiconductor light emitting element 2g that emits green light (arrow V side), and a semiconductor light emitting element that emits red light. 2r (arrow VI side), each provided on a different side surface of the light source device 100.

  FIG. 2 is a side view of the light source device 100 as viewed from the direction of arrow II in FIG. 1 according to the embodiment of the present invention. As shown in FIG. 2, the semiconductor light emitting module 1b includes a base 3 fixed to the main body of the light source device 100, a semiconductor light emitting element 2b provided on the base 3 with the light emitting surface facing the main body, and a base. 3 and male terminals 4 and 5 (first connection terminals) for supplying a current to the semiconductor light emitting element 2b. The semiconductor light emitting element 2 b emits light of an arbitrary wavelength such as an LED or a semiconductor laser, and the male terminals 4 and 5 are soldered to the base 3. The printed circuit board 6b includes female terminals 7 and 8 (second connection terminals) corresponding to the male terminals 4 and 5, a control circuit 9 that controls light emission of the semiconductor light emitting element 2b, and a light source device 100. And a connector 12 (third connection terminal) for receiving power supply. The female terminals 7 and 8 are soldered to the printed circuit board 6b, and the control circuit 9 controls turning on / off of the semiconductor light emitting element 2b in accordance with a synchronization signal input from an external circuit or the like. The fixing hole 10b is formed to fix the printed circuit board 6b to the support 11b formed in the main body of the light source device 100 by screwing. Further, the female terminals 7 and 8 and the male terminals 4 and 5 are fitted and electrically connected. In the following, “r”, “g”, and “b” given to the reference numerals may be omitted without particular notice.

  Further, as shown in FIGS. 1 and 2, a drive board 17 is provided on the upper surface of the light source device 100, and the current supplied to the printed board 6 according to the brightness of the display image arbitrarily selected by the user. The value is controlled. The drive board 17 is provided with a corresponding connector 16 for supplying current to each printed circuit board 6, and each connector 16 and each printed circuit board 6 are electrically connected by a cable 15. Further, as shown in FIG. 1, a heat radiating plate 13 and an air cooling fan 14 as heat radiating means are sequentially provided on the surface of the base 3 opposite to the light emitting surface of the semiconductor light emitting element 2r. In FIG. 1, the heat radiating plate 13 and the air cooling fan 14 are shown only for the semiconductor light emitting element 2r. However, the heat radiating plate 13 and the air cooling fan 14 are also provided for each of the semiconductor light emitting elements 2b and 2g. It shall be.

  In order to emit light having higher luminance from the semiconductor light emitting element 2, the current supplied from the drive substrate 17 to the printed circuit board 6 may be increased. In the light source device 100 according to the present embodiment, the control circuit 9 generates a signal for blinking the semiconductor element 2 in synchronization with the display image, and only supplies a constant current from the drive board 17 to the printed board 6. The control signal is not supplied. That is, an on / off drive current that is a high-frequency current corresponding to the blinking frequency of the semiconductor light emitting element 2 does not flow through the cable 15 that connects the drive board 17 and the printed board 6. Therefore, even if a large current is passed through the cable 15 in order to increase the luminance of the semiconductor light emitting element 2, the cable 15 does not increase high-frequency electromagnetic noise energy. Further, if only the cable 15 is covered with a shield case, it is more effective for shielding electromagnetic waves. In addition, since the control circuit 9 is mounted on the printed circuit board 6, the conduction distance between the control circuit 9 and the semiconductor light emitting element 2 is shorter than when the control circuit 9 is mounted on the drive board 17. Even if the blinking frequency of 2 is increased, the waveform is difficult to dull.

  FIG. 3 is a plan view showing a main part of the internal configuration of the light source device 100 according to the embodiment of the present invention. As shown in FIG. 3, the dichroic mirrors 20b, 20r are installed on the light emitting surface side of the semiconductor light emitting elements 2b, 2r, 2g. The dichroic mirror 20b reflects only the wavelength of blue light (hereinafter referred to as B light) emitted from the semiconductor light emitting element 2b, and the dichroic mirror 20r reflects red light (hereinafter referred to as “light emitted from the semiconductor light emitting element 2r”). Only the wavelength of R light is reflected. Further, a collimator lens 19 is installed between each of the semiconductor light emitting elements 2b, 2r, 2g and the dichroic mirrors 20b, 20r, and single wavelength light emitted from each of the semiconductor light emitting elements 2b, 2r, 2g is emitted. Is refracted by the collimator lens 19 so as to be a parallel light beam.

  The B light emitted from the semiconductor light emitting element 2b is refracted so as to become a parallel light beam by the collimator lens 19, reflected by the dichroic mirror 20b (reflected to the left in the figure), and then transmitted through the dichroic mirror 20r to be condensed. The light is refracted so as to converge at the lens 21 and is incident on the rod integrator 22. The R light emitted from the semiconductor light emitting element 2r is refracted so as to be a parallel light beam by the collimator lens 19, reflected by the dichroic mirror 20r (reflected to the left in the figure), and then transmitted through the dichroic mirror 20b. The light is refracted so as to converge by the condenser lens 21 and is incident on the rod integrator 22. Further, light emitted from the semiconductor light emitting element 2g (hereinafter referred to as G light) is refracted by the collimator lens 19 so as to become a parallel light beam, passes through the dichroic mirrors 20r and 20b, and enters the condenser lens 21. Then, the light is refracted so as to converge and enters the rod integrator 22.

  Light beams of three colors incident on the rod integrator 22 from the respective semiconductor light emitting elements 2b, 2r, 2g are reflected a plurality of times along the rectangular shape of the inner surface of the rod integrator 22, thereby being uniform in a plane orthogonal to the optical axis 23. It is emitted as white light having a rectangular shape. The light beam emitted from the rod integrator 22 is refracted by the relay lens 24 so as to be a substantially parallel light beam, and then is reflected by each of the first reflection mirror 25 and the second reflection mirror 26, so that the light is incident thereon. The light is incident on the light valve 28 through a prism 27 that refracts or transmits light according to an angle.

  The light source device 100 includes a video generation circuit 30, and synchronizes the video signal output from the video generation circuit 30 with the light emission timing of the semiconductor light emitting element 2 output from the control circuit 9 provided on the printed circuit board 6. Thus, the attitude angle of a micro mirror (not shown) inside the light valve 28 is controlled, and the light reflected by the micro mirror of the light valve 28 is enlarged by the projection lens 29 as a color image and is displayed on the screen (not shown). )). In addition, the video generation circuit 30 includes a luminance sensor 31, which corresponds to the intensity of each light based on a small amount of light (R light, G light, B light) transmitted through the second reflecting mirror 26. The amount of light is detected by generating an electric current.

  FIG. 4 is a side view of the light source device when the printed circuit board of FIG. 2 according to the embodiment of the present invention is reversely connected to the semiconductor light emitting module. As shown in FIG. 2, the male terminals 4 and 5 provided on the base 3 are respectively connected to the female terminals 7 and 8 of the printed circuit board 6b and supplied with a positive current and a negative current, respectively. . However, since the arrangement interval of the male terminals 4 and 5 and the arrangement interval of the female terminals 7 and 8 are the same, when connecting the printed circuit board 6b to the semiconductor light emitting module 1b, the plus and minus of each terminal is determined. There is a possibility that the above-mentioned problems may occur due to incorrect connection. In order to prevent such a connection error, in this embodiment, the outer shape of the printed circuit board 6b is asymmetric with respect to the module center line 40 of the semiconductor light emitting module 1b. Therefore, as shown in FIG. 4, when the printed circuit board 6b is connected to the semiconductor light emitting module 1b by mistake in both sides (that is, the male terminal and the female terminal are reversed and connected), the printed circuit board is visually displayed. It becomes easy to notice the mistake of both sides of 6b.

  The fixing hole 10b formed in the printed board 6b is formed at an asymmetric position with respect to the inter-terminal center line 41. That is, the fixing hole 10 b passes through the center of the parallel width of the male terminals 4 and 5 (first connection terminals) and is parallel to the insertion / extraction direction of the male terminals 4 and 5. Are formed at asymmetric positions. Accordingly, when the printed board 6b is fixed to the light source device 100 after the printed board 6b is mistakenly connected (inverted printed board 6b) and connected to the semiconductor light emitting module 1b, the printed board 6b is fixed. Since the positions of the hole 10b and the support 11b in which the screw hole is formed in order to fix the printed circuit board 6b of the light source device 100 by screwing do not match, the printed circuit board 6b cannot be fixed to the support 11b with a screw. As described above, the assembly worker or the person in charge of the maintenance service notices that the printed circuit board 6b is erroneously connected to the semiconductor light emitting module 1b, so that the assembly is performed again in the correct orientation before confirming that the light source device is energized. be able to.

  As shown in FIG. 4, the external shape of the printed circuit board 6 b is that when the printed circuit board 6 b is mistakenly connected to the semiconductor light emitting module 1 b (that is, the male terminal and the female terminal are reversed and connected). In addition, the printed circuit board 6b and the base 3 of the semiconductor light emitting module 1b are formed so as to physically interfere with each other. That is, the external shapes of the printed circuit board 6b and the base 3 are shapes that physically interfere with each other when the male terminals 4 and 5 and the female terminals 7 and 8 are reversely connected. Specifically, a region (convex portion) that overlaps the base 3 when reversed is provided on the printed circuit board 6b. In the present embodiment, the outer shape of the printed circuit board 6b is configured to interfere with each other, but the outer shape of the base 3 may be configured to interfere with the printed circuit board 6b, or a combination thereof. Thus, since the printed circuit board 6b and the base 3 physically interfere with each other, even if the back and front of the printed circuit board 6b is mistakenly connected to the semiconductor light emitting module 1b, the connection cannot be made correctly, and the assembly operator and the maintenance service The person in charge notices that the front and back of the printed circuit board 6b are mistakenly connected to the semiconductor light emitting module 1b at the time of assembly, so that it can be reassembled in the correct orientation before confirming that the light source device is energized. Here, the printed circuit board 6b has been described with reference to FIG. 4, but the same effects as described above can be obtained for the printed circuit boards 6g and 6r.

  As shown in FIG. 1, the connector 12 (third connection terminal) provided on the printed circuit board 6 is provided on the non-facing side of the printed circuit board 6 fixed to face the main body of the light source device 100. Is getting thicker. The shield case 18 is disposed so as to cover the drive board 17 and protrudes outward from the printed board 6. Therefore, as shown in FIG. 4, the connector 12 constitutes the shield case 18 and the light source device 100 when the printed circuit board 6 b is attached to the main body of the light source device 100 with the front and back sides being erroneously connected to the semiconductor light emitting module 1 b. The printed circuit board 6b and the semiconductor light emitting module 1b cannot be attached at the correct positions. As described above, since the printed circuit board 6b and the semiconductor light emitting module 1b cannot be attached at the correct positions, the assembly worker or the person in charge of maintenance service has the board 6b incorrectly connected to the semiconductor light emitting module 1b. Can be reassembled in the correct orientation before confirming that the light source device is energized. Although the printed board 6b has been described here, the same effects as described above can be obtained for the printed boards 6g and 6r.

  5 is a side view of the light source device 100 as viewed from the direction of arrow V in FIG. 1 according to the embodiment of the present invention, and FIG. 6 is a side view of the light source device 100 as viewed from the direction of arrow VI in FIG. FIG. The connection between the printed circuit board 6g and the semiconductor light emitting module 1g and the connection between the printed circuit board 6r and the semiconductor light emitting module 1r are the same as the connection between the printed circuit board 6b and the semiconductor light emitting module 1b shown in FIG. Description is omitted. In FIG. 5, the control circuit 9 of the printed circuit board 6g supplies the current supplied from the drive circuit 17 to the printed circuit board 6g to the female terminals 7 and 8 and the male type in accordance with the timing for displaying green in the display image. It is supplied to the semiconductor light emitting element 2g via the terminals 4 and 5. At this time, only the green lighting sequence signal is input from the video generation circuit 30 to the control circuit 9, and current is supplied to the semiconductor light emitting element 2g based on the input lighting sequence. Such an operation is similarly performed in the configurations shown in FIGS.

  When all of the semiconductor light emitting modules 1b, 1r, and 1g whose brightness has been reduced are replaced with new ones in periodic maintenance inspections, etc., each semiconductor light emitting module 1 and the corresponding printed circuit board 6 are combined in advance (male terminal 4 , 5 and female terminals 7, 8) are exchanged as service parts. However, if these service components are attached at positions different from the positions where they should be originally attached, the intended light cannot be reflected / transmitted by the dichroic mirrors 20b and 20r shown in FIG. 3, and images of different colors are displayed. Will end up. Therefore, it is important to attach the service component to an appropriate position.

  In the present embodiment, the positions of the fixing holes 10 provided with the printed circuit boards 6 are different among the printed circuit boards 6 in order to attach the service products to appropriate positions. That is, the light source device 100 includes three pairs (r, g, b) of the semiconductor light emitting module 1 and the printed circuit board 6, and the printed circuit boards 6 electrically connected to the respective semiconductor light emitting modules 1 are mutually connected. The fixing holes 10 are formed at different positions. Therefore, even if it is intended to attach the printed circuit board 7g to the position where the printed circuit board 7b should be attached, the fixing hole 10g of the printed circuit board 7g cannot be fixed to the support 11b with screws. As described above, the assembly worker or the person in charge of the maintenance service notices an error in the mounting position of the printed circuit board 6 and can reassemble it in the correct direction before confirming that the light source device is energized. In addition, since it is possible to prevent errors in the attachment positions of the three types of printed circuit boards 6, it is possible to display images with correct colors.

  The control circuit 9 of the printed circuit board 6 is supplied with a lighting sequence signal of only a color corresponding to the emission color of the semiconductor light emitting element 2 from the video generation circuit 30. Therefore, if the cable for connecting the printed circuit board 6 corresponding to each color and the image generation circuit 30 is attached in an incorrect combination, the image of the light emitting device 100 when all the semiconductor light emitting elements 2 emit light simultaneously in the energization inspection of the light source device 100. When the color bar chart is displayed in order to inspect the hue by displaying different colors at arbitrary positions in the display image, the entire surface appears white and looks normal. What is the sequence transmitted from the image generation circuit 30? Each semiconductor light emitting element 2 emits light at different timings, and different colors are displayed on the image of the color bar chart. In such a state, even if a natural image or a normal TV broadcast is displayed, it becomes a different color and causes a problem.

  FIG. 7 is a block diagram of the light source device 100 according to an embodiment of the present invention. As shown in FIG. 7, the printed circuit board 6 electrically connected to the semiconductor light emitting element 2 of each semiconductor light emitting module 1 is provided with a memory 32 (storage means) storing different color identification codes. . The system control circuit 33 includes a microprocessor 34, receives a color identification code from the memory 32 via the video generation circuit 30, and receives the received color identification code and a regular color identification code held in the microprocessor 34. And refer to. Therefore, if the cable connection between the video generation circuit 30 and the printed circuit board 6 is incorrect, a color identification code different from the regular color identification code is received from the memory 32, so the microprocessor 34 indicates that the cable connection is incorrect. Displayed on the display panel 35. By displaying the cable connection error on the display panel 35, the wiring operator can recognize the incorrect wiring immediately after energization, and the system control circuit 33 stops the video generation in the video generation circuit 32 in the case of the incorrect wiring. Thus, it is possible to prevent the display of an unpleasant color image for the viewer.

  Further, instead of providing the memory 32 on each printed circuit board 6, chip resistors (not shown) having different specific resistance values may be provided. In this case, since the system control circuit 33 can identify each printed circuit board 6 based on the difference in current value input from each printed circuit board 6, it is the same as the case where the color identification code is stored in each memory 32. An effect is obtained.

  As described above, on the surface of the base 3 opposite to the light emitting surface of the semiconductor light emitting element 2r, the heat radiating plate 13 as the heat radiating means and the air cooling fan 14 are provided in order (see FIG. 1). The heat generated in the semiconductor light emitting element 2 is radiated by the heat radiating plate 13 and the air cooling fan 14. The air-cooling fan 14 according to the present embodiment uses a relatively large air-cooling fan 14 having a side length of 80 mm, and the radiator plate 13 has a larger area than the air-cooling fan 14. It is not limited.

  The present embodiment is characterized in that the connector 12 is provided at a position on the printed circuit board 6 with a predetermined interval from the heat sink 13. Note that the predetermined interval may be an interval that can ensure at least a half length of one side of the air-cooling fan 14 from the light emission center point of the semiconductor light emitting element 2. By providing the connector 12 at such a position, the cable 15 connected to the connector 12 and the heat radiating plate 13 are rubbed due to shaking during assembly work, replacement work, or transportation of the light source device. The possibility that the coating is damaged is reduced, and the possibility that the cable 15 contacts the impeller of the air cooling fan 14 and breaks is also reduced. Therefore, a reliable and sufficient heat radiation effect can be obtained by directly providing the semiconductor light emitting module 1 with the large heat radiation plate 13 and the large air cooling fan 14 without using the conventional heat radiation means by forced liquid circulation. .

  In the present embodiment, each semiconductor light emitting element 2b, 2g, 2r has been described as emitting light with monochromatic light. However, if the optical system is changed, the present embodiment will be described even if the semiconductor light emitting element 2 does not emit light with monochromatic light. Can be applied.

  As an application example of the present invention, it can be applied to a projection type projector using a semiconductor light emitting element as a light source, and is particularly used in a business monitoring field in which a periodic replacement of components constituting a light source device is required during the product life. Applicable to projection type projectors.

  DESCRIPTION OF SYMBOLS 1 Semiconductor light emitting module, 2 Semiconductor light emitting element, 3 Base, 4,5 Male type terminal, 6 Printed circuit board, 7, 8 Female type terminal, 9 Control circuit, 10 Fixing hole, 11 Support | pillar, 12 Connector, 13 Heat sink , 14 Air cooling fan, 15 Cable, 16 Connector, 17 Drive board, 18 Shield case, 19 Collimator lens, 20 Dichroic mirror, 21 Condensing lens, 22 Rod integrator, 23 Optical axis, 24 Relay lens, 25 First reflection mirror , 26 Second reflection mirror, 27 Prism, 28 Light valve, 29 Projection lens, 30 Image generation circuit, 31 Luminance sensor, 32 Memory, 33 System control circuit, 34 Microprocessor, 35 Display panel, 40 Module center line, 41 Center line between terminals, 50 LED module 51, light emitter, 52 substrate, 53, 54 male terminal, 55 lead wire, 56, 57 female terminal, 60 semiconductor light emitting element, 61 base, 62 jacket, 63 radiator, 64 rubber hose, 65 blower fan, 66 cables, 67 drive boards, 100 light source devices.

Claims (8)

A base fixed to the light source device main body, a semiconductor light emitting element provided on the base with a light emitting surface directed toward the main body, and a plurality of bases arranged in parallel to the base and supplying current to the semiconductor light emitting element A semiconductor light emitting module having a first connection terminal;
A plurality of second connection terminals corresponding to each of the plurality of first connection terminals, a control circuit for controlling light emission of the semiconductor light emitting element, a fixing hole for fixing to the main body, and a power supply A printed circuit board having a third connection terminal;
With
The fixing hole passes through the center of the parallel width of the plurality of first connection terminals and is asymmetric with respect to the inter-terminal center line parallel to the insertion / extraction direction of the plurality of first connection terminals. A light source device, characterized in that A base fixed to the light source device main body, a semiconductor light emitting element provided on the base with a light emitting surface directed toward the main body, and a plurality of bases arranged in parallel to the base and supplying current to the semiconductor light emitting element A semiconductor light emitting module having a first connection terminal;
A plurality of second connection terminals corresponding to each of the plurality of first connection terminals, a control circuit for controlling light emission of the semiconductor light emitting element, a fixing hole for fixing to the main body, and a power supply A printed circuit board having a third connection terminal;
With
The external shapes of the printed circuit board and the base are shapes that physically interfere with each other when the plurality of first connection terminals and the plurality of second connection terminals are reversely connected. A light source device. A base fixed to the light source device main body, a semiconductor light emitting element provided on the base with a light emitting surface directed toward the main body, and a plurality of bases arranged in parallel to the base and supplying current to the semiconductor light emitting element A semiconductor light emitting module having a first connection terminal;
A plurality of second connection terminals corresponding to each of the plurality of first connection terminals, a control circuit for controlling light emission of the semiconductor light emitting element, a fixing hole for fixing to the main body, and a power supply A printed circuit board having a third connection terminal;
With
The light source device according to claim 3, wherein the third connection terminal is provided on a non-facing side of the printed circuit board which is fixed so as to face the main body.   4. The light source device according to claim 1, wherein the semiconductor light emitting element emits light with monochromatic light.   A plurality of pairs of the semiconductor light emitting module and the printed circuit board, wherein the printed circuit board electrically connected to each semiconductor light emitting module forms the fixing holes at different positions. The light source device according to claim 4.   A plurality of pairs of the semiconductor light emitting module and the printed circuit board, and the printed circuit board electrically connected to each semiconductor light emitting module has storage means storing different color identification codes or different resistance values. The light source device according to claim 4, further comprising: a resistance unit having the same. The base further comprises heat dissipating means provided on the surface opposite to the light emitting surface of the semiconductor light emitting element,
5. The light source device according to claim 1, wherein the third connection terminal is provided at a position on the printed circuit board at a predetermined distance from the heat radiating unit. 6. The heat dissipating means includes a heat dissipating plate provided on the base and an air cooling fan provided on the heat dissipating plate,
The light source according to claim 7, wherein the predetermined interval is an interval that can ensure at least a length of one half of one side of the air-cooling fan from a light emission center point of the semiconductor light emitting element. apparatus.

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