JP4969542B2 - Light source device and display device including the same - Google Patents

Description

  The present invention relates to a light source device and a display device used as a light source of a display device such as a liquid crystal display device.

  In a display device such as a television, a light source device is disposed on the rear side of a display unit having a display surface for displaying an image on the front side.

A display device in which the light source device is used has a display surface on the front side, and a frame chassis that supports the display panel on the rear side of the display panel that forms a substantially rectangular parallelepiped, and a plurality of pieces mounted on the rear surface of the frame chassis A circuit board. Two reinforcing ribs are mounted on the rear surface of the frame chassis so as to be spaced apart from each other in parallel. The circuit board is disposed between the two reinforcing ribs on the rear surface so as to be spaced apart from the rear surface. An inflow space is provided between the rear surface of the frame chassis and the circuit board by providing an inflow space between the edge and the lower reinforcing rib and an outflow space between the upper edge of the circuit board and the upper reinforcing rib. The heat generated by the circuit board is cooled by causing the air flowing into the inflow space to flow out of the outflow space through the air passage (see, for example, Patent Document 1).
JP 2003-173147 A

  However, in the display device configured as in Patent Document 1, since the reinforcing ribs are provided on the inflow side and the outflow side of the air passage between the rear surface of the frame chassis and the circuit board, the reinforcement is provided. Each rib becomes an obstacle to the air flowing into and out of the air passage, and there is a problem that the waste heat is not smooth.

  A display device such as a television can be thinned by using a light emitting diode as a light source. However, since the support for supporting the light emitting diode has a flat plate shape, the bending strength of the light source device is insufficient, and an improvement measure has been demanded.

  The present invention has been made in view of such circumstances, and a main object thereof is a circuit board in which components are mounted on the other surface of the support member having a substantially rectangular plate portion that supports a light source on one surface. A base plate that supports the base plate is attached, and two reinforcing rods that reinforce the base plate are attached to the base plate at a distance from each other, and the circuit board is reinforced so that the components are spaced apart from the plate portion. Attaching to each other, and providing a vent path open to both sides in the longitudinal direction of the reinforcing rod between the circuit board and the plate portion, the bending elastic modulus of the plate portion in the support body is increased by the reinforcing rod. In addition, an object of the present invention is to provide a light source device and a display device that can improve heat exhaustion and can suppress temperature rise of components of a circuit board.

  The light source device according to the present invention is a light source device including a support body having a substantially rectangular plate portion that supports a light source on one surface, and a circuit board on which components are mounted. The light source device supports the circuit board, and the plate portion. A base plate attached to the other surface, and two reinforcing rods attached to the base plate to reinforce the base plate, wherein the circuit board has the components separated from the base plate. It is attached to each of the reinforcing rods so as to face each other, and an air passage opened to both sides in the longitudinal direction of the reinforcing rod is provided between the circuit board and the base plate.

  In this invention, since the two reinforcing rods are integrated with the base plate, and the base plate integrated with the reinforcing rod is attached to the plate portion, the bending elastic coefficient of the plate portion is determined by the reinforcing rod and the base plate. In addition, the reinforcing rod separates the circuit board, and a ventilation path is provided between the circuit board and the base plate, and parts of the circuit board are arranged in the ventilation path. The heat generated by the components can be exhausted smoothly from the air passage to the outside, the temperature rise of the components of the circuit board can be suppressed, and the durability of the circuit board including the components can be enhanced.

  Further, the light source device according to the present invention is a light source device including a support body having a substantially rectangular plate portion that supports a light source on one surface, and a circuit board on which components are mounted and supported on the other surface of the plate portion. Two reinforcing rods are attached to the other surface of the plate portion so as to reinforce the plate portion, and the circuit board is provided on each of the reinforcing rods so that the components are spaced apart from the plate portion. It is attached, The ventilation path opened on the both sides of the longitudinal direction of the said reinforcement rod is provided between this circuit board and the said board part, It is characterized by the above-mentioned.

  In this invention, since the two reinforcing rods to which the circuit board is attached are integrated with the plate portion and reinforces the plate portion, the bending elastic modulus of the plate portion can be increased by the reinforcing rod, The reinforcing rod separates the circuit board, and an air passage is provided between the circuit board and the plate portion. Since the circuit board components are arranged in the air passage, the heat generated by the circuit board components is ventilated. The heat can be exhausted smoothly from the road to the outside, the temperature rise of the components of the circuit board can be suppressed, and the durability of the circuit board including the components can be enhanced.

Further, in the light source device according to the present invention, the circuit board has a substantially rectangular shape, and fixing ribs having coupling portions at both ends are attached to both opposing edges of the circuit board, and the coupling portion is reinforced with the reinforcement. It is preferable to adopt a configuration in which each is attached.
In the present invention, the fixing rod is integrated with the reinforcing rod, and the reinforcing rod and the base plate having a structure that is integral with the fixing rod are attached to the other surface of the plate portion. The rigidity can be increased by the reinforcing rod, the base plate, and the fixing rod, and the rigidity of the support can be increased even when the relatively large support is substantially flat.

In the light source device according to the present invention, the plate portion has two second reinforcing rods that reinforce the plate portion at spaced positions, and the base plate is attached to the two second reinforcing rods. A certain configuration is preferable.
In this invention, the base plate attached to the two second reinforcing rods that reinforce the plate portion is integrated with the two second reinforcing rods, and the second reinforcing rod integrated with the base plate is the plate portion. Since it is attached to the other surface, the bending elastic modulus of the plate portion can be increased by the reinforcing rod, the base plate, and the second reinforcing rod, and even if a relatively large support becomes a flat plate, the support The rigidity of the body can be increased.

In the light source device according to the present invention, it is preferable that the plate portion is coupled to an end portion of each of the second reinforcement rods, and a third reinforcement rod for reinforcing the plate portion is attached.
In the present invention, the third reinforcing rods are coupled to the end portions of the two second reinforcing rods to form a U-shaped integrated structure. The integrated second and third reinforcing rods are Since it is attached to the other surface of the plate portion of the support body, the bending elastic modulus of the plate portion can be further increased, and the rigidity of the support body can be increased even if the relatively large support body becomes substantially flat. It can be further increased.

Further, in the light source device according to the present invention, the third reinforcing rod is inclined with respect to the other surface of the plate portion at a portion facing the outside opening portion of the air passage and passes through the air passage. It is preferable to have a structure in which a wind guide portion for guiding the air is provided.
In the present invention, when the support body is arranged so that the air passage is opened up and down, the air that is exhausted and raised upward from the air passage hits the air guide portion, and obliquely upwards by the air guide portion. Since heat can be exhausted smoothly, exhaust heat performance can be enhanced.

In addition, a display device according to the present invention includes a display unit having a display surface on the front side and the light source device of the above-described invention disposed on the back side of the display unit.
In the present invention, the bending elastic modulus of the support can be increased by the two reinforcing rods and the base plate that reinforce the base plate, and even if a relatively large support has a substantially flat plate shape, The rigidity of the circuit board components can be increased, and the heat generated by the circuit board components can be smoothly exhausted from the air passage to the outside, and the temperature rise of the circuit board components can be suppressed. The durability of the substrate can be increased.

  According to the present invention, since the bending elastic modulus of the plate portion can be increased by the two reinforcing rods that reinforce the plate portion of the support body, even if the relatively large support body becomes substantially flat, The rigidity of the circuit board components can be increased, and the heat generated by the circuit board components can be smoothly exhausted from the air passage to the outside, so that the temperature rise of the circuit board components can be suppressed. The durability of the circuit board can be increased.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. 1 is a rear perspective view showing the configuration of the light source device incorporated in the display device, FIG. 2 is a rear view showing the configuration of the light source device, and FIG. 3 is an exploded perspective view showing the configuration of the light source device with the base plate removed. 4 is an exploded perspective view showing a configuration with the circuit board removed, FIG. 5 is a partially exploded exploded view showing the configuration with the circuit board removed, and FIG. 6 is an enlarged view showing the configuration of the main part. FIG. 7 is a rear view showing the configuration of the base plate, FIG. 8 is a perspective view showing the configuration of the second reinforcing rod, FIG. 9 is an enlarged sectional view showing the configuration of the third reinforcing rod portion, and FIG. 10 is the light source device. FIG. 11 is a schematic cross-sectional view showing the configuration of the light source portion of the light source device, and FIG. 12 is a schematic explanatory view showing the configuration of the light source.

  The illustrated light source device has a display surface on the front side and is mounted on the rear side of the display unit in a thin display device having a display unit having a substantially rectangular parallelepiped shape. A diode 1, a plurality of light emitting diode substrates 2 on which the light emitting diodes 1 are mounted, a support 3 that supports the light emitting diode substrates 2 side by side, and a plurality of conductors that guide light emitted from the light emitting diodes 1 in the lateral direction. An optical plate 4 and a plurality of reflecting plates 5 that reflect the light guided by the light guide plate 4 in a direction opposite to the support 3 are provided.

  The support 3 is formed by forming a metal plate, has a substantially rectangular flat plate portion 31, and supports a plurality of light emitting diode substrates 2 side by side in the longitudinal direction and the width direction on one surface of the plate portion 31. In addition, a heat radiating plate 30 that dissipates heat generated by the light emitting diode 1 from the light emitting diode substrate 2 to the plate portion 31 is interposed between the light emitting diode substrate 2 and the plate portion 31. In addition, a plurality of connection holes 32 for connecting the light emitting diode substrates 2 juxtaposed in the longitudinal direction of the plate portion 31 to each other by a conducting wire and a plurality of attachments for individually attaching the light guide plates 4 to the plate portion 31 are also provided. A hole 33 is opened. Further, a step portion 34 that is biased in the plate thickness direction is provided at the peripheral portion of the plate portion 31, and an elongated shape that supports a part of each light guide plate 4 between the step portion 34 and the light emitting diode substrate 2. The first support plate 11 is attached, and an elongated second support plate 12 that supports an optical sheet to be described later is attached to the peripheral side of the step portion 34.

  The light emitting diode substrate 2 has a substantially rectangular shape, the light emitting diode 1 is mounted on one surface, and is mounted side by side on one surface of the plate portion 31.

  The light guide plate 4 has a light incident surface 4a and a light exit surface 4b that irradiates light incident on the light incident surface 4a in a direction substantially orthogonal to the light incident surface 4a, and faces one side of the light emitting diode 1. The light incident surface 4a is disposed at a position where the light is incident, the light exit surface 4b is disposed at a position facing the rear surface of the display unit, and the reflector 5 is attached to the surface opposite to the light exit surface 4b. .

  As described above, the power supply circuit board 13 that supplies power to the display unit and the image displayed on the display surface of the display unit are processed on the other surface of the plate unit 31 on which the light-emitting diode substrate 2 is attached. A base plate 6 that supports a plurality of circuit boards such as a terminal circuit board 14 to be supported is supported, and two reinforcing rods 7 and 7 that reinforce the base plate 6 are attached to the base plate 6. Further, on the other surface of the plate portion 31, two second reinforcing rods 8 and 8 for reinforcing the plate portion 31 at positions separated by a relatively long distance in the longitudinal direction, and the second reinforcing rods 8 and 8 Between the fourth reinforcement rods 9 and 9 that are juxtaposed at a relatively short distance and reinforce the plate portion 31, one end of the second reinforcement rods 8 and 8 and the fourth reinforcement rods 9 and 9, and the long side of the plate portion 31. And the third reinforcement rod 10 which is coupled to the end portions of the second reinforcement rods 8 and 8 and the fourth reinforcement rods 9 and 9 and reinforces the plate portion 31 through a plurality of spacer members 60. It is attached with a screw.

  The base plate 6 is formed by molding a metal plate, and supports the power circuit board 13 and the terminal circuit board 14 on one surface, and has a substantially rectangular support plate portion 61 and one surface side from both longitudinal edges of the support plate portion 61. Two first projecting pieces 62, 62 projecting to the second, second projecting pieces 63, 63 as attached portions projecting outward from the tips of the first projecting pieces 62, 62, and other support plate 61 It has the 3rd protrusion 64 which protrudes to one surface side from one of two opposing edges, and the 4th protrusion 65 which protrudes to the other surface side from the other two other edges of the support plate part 61. The second projecting pieces 63 and 63 are attached to the two second reinforcing rods 8 and 8 by male screws, the third projecting piece 64 is attached to the third reinforcing rod 10 by male screws, and the fourth projecting piece 65 is a plate. It is attached to the part 31 by a male screw.

  Between the longitudinal ends of the support plate portion 61, two reinforcing rods 7 and 7 for reinforcing the base plate 6 are attached to be separated in the longitudinal direction, and a power source is interposed between the reinforcing rods 7 and 7 in the longitudinal direction. Two fixing rods 15 and 15 for supporting the circuit board 13 are attached. Further, a notch portion 66 corresponding to the control circuit board 16 is provided between the reinforcing rods 7 and 7 at the longitudinal center portion of the support plate portion 61.

  The notch 66 is a through-hole having a quadrangle formed at a location separated from the long side of the support plate 61, and supports the control circuit board 16 at the exposed position of the plate 31 exposed at the notch 66. A third base plate is attached by a plurality of male screws.

  The reinforcing rods 7 and 7 are formed by forming a metal plate into a U-shaped cross section, are formed to have a length slightly shorter than the width of the support plate portion 61, and are formed by a plurality of male screws so that the groove faces the support plate portion 61. It is attached to the support plate part 61.

  The fixing rod 15 is formed by molding a metal plate with a relatively narrow width, and is arranged so as to straddle one reinforcing rod 7 from the second reinforcing rod 8 arranged on one side in the longitudinal direction of the plate portion 31. It is formed in a length that reaches the other reinforcing rod 7, and fixed portions 15 a are provided at three locations, both ends and the middle. The fixing rods 15 are juxtaposed in the longitudinal direction of the reinforcing rods 7, 7, the fixing portion 15 a at one end is attached with a male screw in the middle in the longitudinal direction of the second reinforcing rod 8, and the fixing portion 15 a at the other end and the middle The fixed portion 15a is attached to the middle of the two reinforcing rods 7 and 7 by a male screw, and the portion between the two reinforcing rods 15 and 15 between the reinforcing rods 7 and 7 and one of the second reinforcing rods 8 are provided. And the power supply circuit board 13 is attached to the part between one reinforcing rod 7 respectively.

  The power supply circuit board 13 has a substantially rectangular shape with a plurality of components mounted on one surface, and both opposite edges of the power supply circuit board 13 are attached to the fixing rods 15 and 15 by male screws. Is attached to the reinforcement rods 7 and 7 by the fixing rods 15 and 15 so as to face the support plate portion 61 with a slight distance therebetween, and between the power circuit board 13 and the support plate portion 61, An air passage 17 that is open to both sides in the longitudinal direction is provided.

  The second reinforcing rod 8 is formed by forming a metal plate into a U-shaped cross section, and is formed to have a length shorter than the width of the plate portion 31. One adjacent second reinforcing rod 8 and the fourth reinforcing rod 9 are juxtaposed on one side in the longitudinal direction of the plate portion 31 at a relatively short distance so that the groove faces the plate portion 31, and the other adjacent The second reinforcing rod 8 and the fourth reinforcing rod 9 are juxtaposed so that the groove faces the plate portion 31 on the other side in the longitudinal direction of the plate portion 31 with a relatively short separation distance. Moreover, the to-be-joined part which has an insertion hole is provided in the both ends of each of the 2nd reinforcement rod 8 and the 4th reinforcement rod 9. FIG.

  The third reinforcing rod 10 is formed by forming a metal plate into a U-shaped cross section, is formed to have a length shorter than the length of the plate portion 31, and two coupled portions are provided at both ends. The third reinforcing rod 10 is arranged in parallel to the long side of the plate portion 31 at a position separated from the edge of the plate portion 31 toward the center side, and the two coupled portions at one end are the second reinforcing rod 8 and the fourth. The reinforcing rod 9 is coupled to the coupled portion at one end of the reinforcing rod 9 by a male screw, and is fixed to the plate portion 31 so that the groove is opposed to the plate portion 31. The two reinforcing rods 8 and the fourth reinforcing rod 9 are coupled to the coupled portions at one end portions thereof by male screws, and are fixed to the plate portion 31 so that the grooves face the plate portion 31.

  The third reinforcing rod 10 is inclined with respect to the other surface of the plate portion 31 at a portion facing the outside opening portion of the air passage 17, and the air that has passed through the air passage 17 is inclined with respect to the other surface. A wind guide portion 10a that guides air in the direction is provided.

  On the plate portion 31 between the second reinforcing rod 8 and the fourth reinforcing rod 9 juxtaposed on one side in the longitudinal direction of the plate portion 31, a power circuit board 18 connected to the light emitting diode substrate 2 is provided with a plurality of male members. The plate portion 31 between the second reinforcing rod 8 and the fourth reinforcing rod 9 that are attached by screws and juxtaposed on the other side in the longitudinal direction of the plate portion 31 is connected to the light emitting diode substrate 2 and emits light. A control circuit board 19 for controlling the diode 1 is attached by a plurality of male screws, and a control circuit board for controlling the display section on the opposite side of the third reinforcing rod 10 in the longitudinal center of the plate section 31. 16 is attached by a plurality of male screws.

  Further, the second reinforcing rod 8 and the fourth reinforcing rod 9 juxtaposed on one side in the longitudinal direction of the plate portion 31 are covered with the power circuit board 18 to block electromagnetic waves from the power circuit board 18. The cover 20 is attached by a plurality of male screws, and the second reinforcing rod 8 and the fourth reinforcing rod 9 juxtaposed on the other side in the longitudinal direction of the plate portion 31 are covered with the control circuit board 19, A cover 21 that blocks electromagnetic waves is attached to the control circuit board 19 by a plurality of male screws.

  The support 3 of the light source device configured as described above has two second reinforcing rods 8 and 8 attached at relatively long separation distances on both sides in the longitudinal direction of the plate portion 31, and the second reinforcements on both sides thereof. The base plate 6 is attached to the base plates 8 and 8, the two reinforcing bases 7 and 7 are attached to the base plate 6 apart from each other, and the reinforcing base 7, the base plate 6, and the second reinforcing base 8 are integrated with the plate portion 31. Since it becomes a structure and the board part 31 is reinforced, the bending elastic modulus of the flat support body 3 can be raised.

  The power supply circuit board 13 is attached to the reinforcement rods 7 and 7 attached to the support plate portion 61 of the base plate 6 so that the component 13a is spaced apart from the support plate portion 61 and faces the support plate portion 61. Since the ventilation path 17 opened to both sides in the longitudinal direction of the reinforcing rods 7 and 7 is provided between the part 61 and the part 13 a can be cooled by the air that ventilates the ventilation path 17. Since the air passage 17 is opened to the outside between the reinforcing rods 7 and 7, the flow on the inlet side and the outlet side of the air passage 17 can be made smooth.

  The support body 3 has a third reinforcing rod 10 coupled to one end of two second reinforcing rods 8 and two fourth reinforcing rods 9 to form an integral U-shape. Since the fourth reinforcing rod 9 and the third reinforcing rod 10 are attached to the plate portion 31 of the support 3 and are integrated with the plate portion 31, the bending elastic modulus of the support 3 that is substantially flat is sufficiently large. Can be increased.

  Further, two second reinforcing rods 8 and four reinforcing rods 9 are juxtaposed on one side portion and the other side portion of the plate portion 31 in the longitudinal direction, respectively, and the second reinforcing rod 8 and the fourth reinforcing rod 9 are shielded from electromagnetic waves. Since the covers 20 and 21 are attached and the covers 20 and 21 reinforce the plate portion 31, the bending elastic modulus of the support 3 can be further increased.

  FIG. 13 is a cross-sectional view showing a configuration of a display device including the light source device according to the present invention. The display device includes a display unit 40 having a display screen for displaying a television image on the front side, a light source device A disposed on the rear side of the display unit 40, a peripheral portion of the display unit 40, and a rear of the light source device A. And a cabinet 41 covering the side.

  The display unit 40 includes a display panel 42 having a display surface and an optical sheet 43 disposed on the rear side of the display panel 42. The peripheral edge of the display panel 42 is held in front and back by a front holding frame body 44 and a rear holding frame body 45 to constitute a panel module, and the rear holding frame body 45 is formed on the peripheral edge portion of the support 3. Installed.

  The optical sheet 43 includes two relatively thick diffuser plates 43a that diffuse light emitted from the light emitting diode 1 as a light source, and a relatively thin synthetic resin sheet 43b such as a reflective polarizing plate, a prism sheet, and a diffuser sheet. The peripheral edge of the diffusion plate 43 a is supported by the peripheral edge of the support 3 via the second support plate 12.

  The cabinet 41 includes a cabinet front part 41 a that covers the front side of the peripheral part of the display unit 40, and a deep dish-shaped cabinet rear part 41 b that covers the peripheral part and the rear side of the light source device A. It is attached to the periphery of this by a male screw.

  In the light source portion of the display device configured as described above, the reinforcement rods 7 and 7 are attached to the support plate portion 61 of the base plate 6 that supports the power supply circuit board. A power supply circuit board is mounted so as to face the support plate part at a distance from each other, and an air passage that is open to both sides in the longitudinal direction of the reinforcement rod is provided between the power supply circuit board and the support plate portion and the reinforcement rods 7 and 7. Therefore, the air that has entered the air passage from the lower end inlet of the air passage can be discharged smoothly from the upper end outlet of the air passage, and the cooling effect of the power circuit board components by the air in the air passage can be enhanced. it can.

  FIG. 14 is a cross-sectional view of a main part showing another configuration of the light source device. In this light source device, the base plate 6 is eliminated, the two second reinforcing rods 8 and 8 provided on the plate portion 31 are used as reinforcing rods, and the power supply circuit board 13 is opposed to the plate portion 31 with the component 13a spaced apart. Thus, the second reinforcing rods 8 and 8 (reinforcing rods) are attached to each other, and the air passage 17 is provided between the circuit board 13 and the plate portion 31 and the second reinforcing rods 8 and 8. Since other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 6, the same components are denoted by the same reference numerals, and detailed descriptions and descriptions of the operations and effects are omitted.

  In the above-described embodiment, the light emitting diode 1 is provided as a light source. However, a light source having a lamp may be used, and the configuration of the light source is not particularly limited.

  In the embodiment described above, two second reinforcing rods 8 and 8 and fourth reinforcing rods 9 and 9 are juxtaposed on both sides in the longitudinal direction of the plate portion 31, respectively. Although the third reinforcement rod 10 is coupled to one end of the four reinforcement rods 9 and 9, the fourth reinforcement rods 9 and 9 may be omitted.

  In the embodiment described above, the base plate 6 that supports the power supply circuit board 13 and the terminal circuit board 14 is provided. However, the configuration of the circuit board is not particularly limited.

It is a back side perspective view which shows the structure of the light source device integrated in the display apparatus which concerns on this invention. It is a rear view which shows the structure of the light source device which concerns on this invention. It is a disassembled perspective view which shows the structure of the state which removed the base plate of the light source device which concerns on this invention. It is a disassembled perspective view which shows the structure of the state which removed the circuit board of the light source device which concerns on this invention. It is the disassembled perspective view which expanded a part which shows the structure of the state which removed the circuit board of the light source device which concerns on this invention. It is an expanded sectional view which shows the structure of the principal part of the light source device which concerns on this invention. It is a rear view which shows the structure of the base plate of the light source device which concerns on this invention. It is a perspective view which shows the structure of the 2nd reinforcement rod of the light source device which concerns on this invention. It is an expanded sectional view which shows the structure of the 3rd reinforcement collar part of the light source device which concerns on this invention. It is typical sectional drawing which shows the structure of the light source part of the light source device which concerns on this invention. It is typical sectional drawing which shows the structure of the light source part of the light source device which concerns on this invention. It is typical explanatory drawing which shows the structure of the light source of the light source device which concerns on this invention. It is sectional drawing which shows the structure of a display apparatus provided with the light source device which concerns on this invention. It is sectional drawing of the principal part which shows the other structure of the light source device which concerns on this invention.

Explanation of symbols

1 Light-emitting diode (light source)
DESCRIPTION OF SYMBOLS 3 Support body 31 Plate part 6 Base plate 7 Reinforcement rod 8 Second reinforcement rod 10 Third reinforcement rod 10a Air guide portion 13 Power supply circuit board (circuit board)
13a parts 17 air passage

Claims (7)

  In a light source device comprising a support having a substantially rectangular plate part for supporting a light source on one surface and a circuit board on which a component is mounted, a base that supports the circuit board and is attached to the other surface of the plate part A plate and two reinforcing rods attached to the base plate to reinforce the base plate, and the circuit board includes the reinforcing rods so that the component faces the base plate at a distance. The light source device is characterized in that an air passage that is open to both sides in the longitudinal direction of the reinforcing rod is provided between the circuit board and the base plate.   In a light source device comprising: a support body having a substantially rectangular plate portion that supports a light source on one surface; and a circuit board on which components are mounted and supported on the other surface of the plate portion; Two reinforcing rods that are attached to reinforce the plate portion are provided, and the circuit board is attached to each of the reinforcing rods so that the components are spaced apart from the plate portion, and the circuit board and the plate The light source device is characterized in that an air passage that is open to both sides in the longitudinal direction of the reinforcing rod is provided between the two portions.   The circuit board has a substantially rectangular shape, a fixing rod having coupling portions at both ends is attached to each of opposite edges of the circuit board, and the coupling portion is attached to each of the reinforcing rods. 2. The light source device according to 2.   4. The light source device according to claim 1, wherein the plate portion is provided with two second reinforcing rods for reinforcing the plate portion at spaced positions, and the base plate is attached to the two second reinforcing rods. .   5. The light source device according to claim 4, wherein the plate portion is coupled to an end portion of each of the second reinforcing rods and attached with a third reinforcing rod for reinforcing the plate portion.   The third reinforcing rod is provided with a wind guide portion that is inclined with respect to the other surface of the plate portion and that guides the air that has passed through the vent passage, at a portion facing the outside opening portion of the vent passage. The light source device according to claim 5.   A display device comprising: a display unit having a display surface on a front side; and the light source device according to claim 1 disposed on a back side of the display unit.

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