JP2013145403A - Display device, television receiver, and heat-radiating plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device and the like allowing a person to easily check rank information of an LED without removing it from a heat-radiating body.SOLUTION: A display device comprises a holding frame projecting in a direction substantially at right angles to the back face of a display panel (liquid crystal panel 1) and a placement section that is elongated in the direction along the side face of the display panel (liquid crystal panel 1). A heat-radiating body (heat spreader) is placed in the length direction of the placement section, information (rank information) on light emitting elements (white LEDs) is written on the other face of a substrate (base plate) and an aperture (window 46) is provided in a position corresponding to the written position of the information (rank information) on the face where the substrate (base plate) of the heat-radiating body (heat spreader) is fixed.

Description

  The present invention relates to an edge light type display device, a television receiver including the display device, and a heat sink.

  A liquid crystal display device including a liquid crystal panel as a display panel is widely used as an image display device for a television receiver, a computer, and a portable terminal in recent years because it is thin and light and consumes less power.

  Since the liquid crystal panel, which is a constituent member of the liquid crystal display device, does not emit light by itself, the liquid crystal display device requires a light source unit on the surface, unlike a self-luminous display device such as a CRT (Cathode Ray Tube).

  One method of the light source unit is an edge light method. The edge light system is a system in which a light guide plate and a cover that supports the light guide plate are arranged on the back side of the liquid crystal panel, and a light source is arranged on the side surface side of the light guide plate. In the edge light system, light incident from the side surface of the light guide plate is emitted from one surface of the light guide plate while diffusing in the light guide plate. Therefore, there is an advantage that the front and back thickness of the display device can be reduced as compared with the direct light method in which the light source is arranged on the back side of the diffusion plate.

  In the edge light system, in recent years, LEDs (Light Emitting Diodes) smaller than conventional cold cathode tubes have been used as light sources. The LED used as the light source is a white light emitting LED. White LEDs vary in light emission characteristics such as chromaticity or brightness for each LED. Therefore, the manufactured white LEDs are divided into a plurality of groups and managed for each characteristic value. Each group is called a rank. When a white LED is mounted, the display quality deteriorates when a combination of white LEDs having different ranks is mounted. Therefore, it is necessary to mount the white LEDs on the LED substrate in accordance with the rank.

  In addition, in the case where replacement and repair (so-called maintenance) is performed due to failure of the LED board that has been installed and used, a white LED of the same rank as the white LED mounted on the failed LED board is mounted. Finding an LED substrate from among a large number of manufactured LED substrates is a labor-intensive operation.

  In order to solve such a problem, in the display device described in Patent Document 1, each time an LED substrate is manufactured, the ranks of a plurality of white LEDs mounted on the LED substrate are assigned to the surface of each LED substrate or the side surface of the white LED. To record. It is described that when the LED board fails, the rank of the white LED mounted on the LED board is obtained by reading a barcode recorded on the failed LED board.

JP 2011-18576 A

  However, in recent years, white LEDs are mounted at a high density in order to increase display brightness, and therefore it is difficult to describe rank information such as barcodes on the white LED mounting surface (LED substrate surface). In addition, since the white LED is miniaturized as the display device is thinned, it is difficult to write rank information on the side surface of the white LED. Therefore, rank information must be written on the back surface of the LED substrate (the surface opposite to the white LED mounting surface).

  On the other hand, when the white LED is driven to emit light with high brightness, the temperature becomes high, which not only affects other components, but the white LED itself may be damaged by heat. Therefore, when using white LED as a light source, it is essential to provide a heat dissipation structure. As a method of heat dissipation, a metal heat dissipator such as aluminum is attached to the back surface of the LED substrate.

  Therefore, when the LED substrate is attached to the heat radiator, the rank information is hidden by the heat radiator. In order to check the rank information, it is necessary to remove the heat radiator from the LED board. However, the LED board may be damaged because it is thin and has low rigidity.

  The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a display device and the like that can easily check the rank information of white LEDs without removing them from the radiator.

  The display device according to the present invention is a display device comprising: a substrate on which a light emitting element that supplies light to a display panel that displays an image on the front side is mounted; and a radiator that fixes the substrate. Information on the light-emitting element is described on the other surface of the substrate, and an opening is provided at a position corresponding to the description position of the information on the surface on which the substrate of the radiator is fixed. Features.

  In the present invention, in a display device comprising: a substrate on which a light emitting element that supplies light to a display panel that displays an image on the front side is mounted; and a radiator that fixes the substrate; Since the information on the light emitting element is described on the substrate on which the heat sink is mounted, and the radiator corresponding to the described position is provided with an opening, the information on the light source module can be obtained without removing the light source module from the radiator. It becomes possible to refer to it.

  In the display device according to the present invention, a connector connected to a conductive wire for supplying power to the light emitting element is attached to one surface of the substrate, and the information is described on the other surface of the substrate corresponding to the fixing position of the connector. It is characterized by being.

  In the present invention, since the information is described on the other surface of the substrate corresponding to the fixed position of the connector, the information description position can be easily specified using the connector as a mark.

  The display device according to the present invention is characterized in that the information is written on an end portion of the substrate.

  In the present invention, since information is described at the end of the substrate, the information description position can be easily specified.

  A television receiver according to the present invention includes the above-described display device and a tuner unit that receives a television broadcast, and displays an image related to the television broadcast received by the tuner unit on the display device. It is characterized by being.

  In the present invention, information on the light emitting element is described on the substrate on which the light emitting element is mounted, and an opening is provided in the radiator corresponding to the described position, so the light source module is removed from the radiator. It is possible to refer to the information of the light source module without any problem.

  In the heat dissipation plate according to the present invention, a light-emitting element that supplies light to a display panel that displays an image on the front side is mounted on one surface, and a heat-radiation plate that is attached to a substrate on which information on the light-emitting element is described on the other surface An opening is provided at a position corresponding to the position where the information is described.

  In the heat dissipation plate according to the present invention, a connector connected to a conductive wire for supplying power to the light emitting element is attached to one surface of the substrate, and the information is described on the other surface of the substrate corresponding to the fixing position of the connector. It is characterized by being.

  In the heat dissipation plate according to the present invention, the information is described at an end portion of the substrate.

  According to the present invention, information on the light emitting element is described on the substrate on which the light emitting element is mounted, and an opening is provided in the radiator corresponding to the described position, so that the light source module is removed from the radiator. It is possible to refer to the information of the light source module.

1 is a perspective view showing an appearance of a liquid crystal television in a first embodiment. It is a longitudinal cross-sectional view which shows the principal part of a liquid crystal television. It is a fragmentary perspective view of a light source module. It is a fragmentary perspective view of the heat spreader seen from the back side lower part. It is sectional drawing in the VV line of FIG. It is the fragmentary perspective view of the light source module and heat spreader seen from the back side. It is a fragmentary perspective view of the heat spreader by which the light source module seen from the back side was mounted. It is the perspective view which looked at the holding frame from the upper left side. It is the perspective view which looked at the member back side of the lower part among members which constitute a maintenance frame from the left side. It is sectional drawing in the XX line of FIG. It is the fragmentary perspective view which looked at the member back side of the lower part of the holding frame body in which the heat spreader is mounted from the left side. It is a disassembled perspective view of the liquid crystal television in this Embodiment 1. FIG. It is the fragmentary perspective view which looked at the light source module and the heat spreader from the lower side. It is the fragmentary perspective view which looked at the heat spreader by which the light source module was mounted from the lower side. It is the fragmentary perspective view which looked at the heat spreader with which the light source module was mounted from the side surface. It is the fragmentary perspective view which looked at the heat spreader with which the light source module was mounted from the side surface. It is the fragmentary perspective view which looked at the heat spreader with which the light source module was mounted from the side surface. It is the fragmentary perspective view which looked at the heat spreader with which the light source module was mounted from the side surface.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. Here, a liquid crystal television including a display device (hereinafter referred to as “liquid crystal television”) is taken as an example.

Embodiment 1
FIG. 1 is a perspective view showing the appearance of the liquid crystal television in the first embodiment. The liquid crystal television includes a liquid crystal panel 1 (display panel), a front cabinet 6, a rear cabinet 12, a stand 15, a tuner unit 16, an image processing unit 17, and a power supply control unit 18. The liquid crystal panel 1 has a substantially rectangular parallelepiped shape and displays an image on the front side. The front cabinet 6 is a rectangular frame and covers the periphery of the liquid crystal panel 1 from the front side. The rear cabinet 12 covers the back side of the liquid crystal panel 1. The stand 15 is for placing the liquid crystal television 1 on a flat surface such as a table.

  The tuner unit 16 receives a television broadcast and extracts a broadcast signal. The image processing unit 17 extracts image information from the broadcast signal. An image is displayed on the liquid crystal panel 1 based on the extracted image information. The power control unit 18 supplies power of a predetermined voltage to each unit of the liquid crystal television.

  In the following description, the side of the liquid crystal television set with the liquid crystal panel 1 is referred to as the front side, the opposite side of the front side is referred to as the back side, and the left and right sides toward the liquid crystal panel 1 are referred to as the left side and the right side, respectively. Further, the upper and lower sides of the liquid crystal panel 1 are referred to as an upper side and a lower side, respectively.

  In the description of each component of the liquid crystal television, the direction in which each component is assembled is described unless otherwise specified.

  FIG. 2 is a longitudinal sectional view showing a main part of the liquid crystal television. In FIG. 2, it is drawn with the front side of the liquid crystal television set facing down. In the liquid crystal television of Embodiment 1, a light guide plate 2 sandwiched between a lens system sheet group 7 from the front side and a light reflecting sheet 8 from the back side is disposed on the back side of the liquid crystal panel 1. A light source module 3 in which a white LED 30 (light emitting element) is mounted on a base substrate 31 (substrate) is disposed facing the side surface in the longitudinal direction of the light guide plate 2. The light source module 3 is fixed to a surface 41 parallel to the light guide plate 2 of the heat spreader 4 (heat radiator). Further, the heat spreader 4 is fixed to a surface (mounting portion) parallel to the light guide plate 2 of the holding frame 5. The liquid crystal panel 1, the heat spreader 4, and the like are sandwiched between the holding frame 5 on the front side of the liquid crystal panel 1 and the backlight chassis 9 on the back side of the liquid crystal panel 1, and are fixed to the front cabinet 6 with screws 61.

  The light guide plate 2 is made of a synthetic resin such as acrylic resin, polycarbonate resin, methacrylic resin, or cyclic polyolefin, and is formed in a substantially rectangular shape.

  The backlight chassis 9 is formed of a metal plate, for example, a steel plate, in a substantially rectangular shape. The backlight chassis 9 covers the liquid crystal panel 1, the light guide plate 2, the light source module 3 and the like from the back side of the liquid crystal television.

  An elastic member 13 is provided at a portion where the holding frame 5 and the liquid crystal panel 1 are in contact with each other to securely fix the liquid crystal panel 1 and prevent the holding frame 5 from damaging the surface of the liquid crystal panel 1. Yes. The front cabinet 6 covers the holding frame 5.

  In the liquid crystal television configured as described above, the light emitted from the white LED 30 enters from the side edge of the light guide plate 2. Since there is the light reflecting sheet 8 on the back side of the light guide plate 2, the light traveling in the back side direction of the light guide plate 2 is reflected by the light reflecting sheet 8. The light reflected by the light reflecting sheet 8 irradiates the liquid crystal panel 1 from the back side. The liquid crystal panel 1 is controlled, and an image is displayed on the front side of the liquid crystal panel 1.

  FIG. 3 is a partial perspective view of the light source module 3. FIG. 3A is a partial perspective view of the light source module 3 when the surface of the light source module is viewed from above. FIG. 3B is a partial perspective view of the rear surface of the light source module as viewed from the lower side of the light source module 3. FIG. 4 is a partial perspective view of the heat spreader 4 as seen from the lower rear side. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a partial perspective view of the light source module 3 and the heat spreader 4 as seen from above. FIG. 7 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from above. FIG. 8 is a perspective view of the holding frame 5 as viewed from the upper left side.

  As shown in FIG. 3A, the light source module 3 includes a plurality of white LEDs 30, a strip-shaped base substrate 31 on which the white LEDs 30 are mounted, and a connector 32. The white LEDs 30 are juxtaposed along the longitudinal direction on one surface of the base substrate 31. The white LED 30 is driven by a drive circuit (not shown) to emit light. The drive current of the white LED 30 is supplied by a cable connected by the connector 32. The connector 32 is fixed to one end of the base substrate 31. The connector 32 is provided with an adapter insertion opening in a direction crossing the longitudinal direction of the base substrate 31. A terminal of the connector 32 is connected to one of the conductive wires provided on the base substrate 31, and the other of the conductive wires is connected to a terminal of the white LED 30, whereby electric power is supplied to the white LED 30.

  As shown in FIG. 3B, rank information 34 (information on the light emitting element) is described on the other surface of the base substrate 31 on the opposite side of the installation position of the connector 32. The rank information 34 is, for example, a character string composed of a barcode, a two-dimensional code, a pictogram, or alphanumeric characters. The rank information 34 is information representing the rank of the white LED 30 mounted on the light source module 3. The rank information 34 includes identification information (ID, serial number, lot number, etc.) corresponding to the rank, light emission characteristic information (chromaticity, luminance, etc.) of the white LED 30 corresponding to the rank, or identification information and white LED 30 corresponding to the rank. The light emission characteristic information.

  The heat spreader 4 is a rod-shaped member as shown in FIG. 4 and has a substantially U-shaped cross section as shown in FIG. As shown in FIG. 7, the light source module 3 is placed on the upper portion 41 which is the upper side when attached as shown in FIG. As shown in FIGS. 4 and 6, a rectangular window 46 (opening) is provided at the end of the heat spreader 4. The window 46 is formed at a position where the rank information 34 described on the back surface is exposed on the base substrate 31 when the heat spreader 4 and the light source module 3 are fixed with screws 330 through the screw holes 33 and 47. . As shown in FIG. 6, the upper portion 41 is provided with a screw hole 47. The light source module 3 is fixed to the heat spreader 4 by passing a screw through the screw hole 33 and the screw hole 47. In FIG. 7, screws are omitted. The window portion 46 is not limited to a rectangular shape, and may be a circular shape, an elliptical shape, or a polygonal shape excluding a square shape.

  As shown in FIG. 4, the front side portion 42 of the heat spreader 4 is continuous with the lower side portion 43. The lower portion 43 is discontinuous and is cut at several places. Between the cut | disconnected lower part 43, the plate-shaped coupling part 44 extended in the downward direction following the front side part 42 is formed. The coupling portion 44 is also formed at both end portions of the heat spreader 4. The heat spreader 4 is fixed to the holding frame 5 by screws 61 passing through the screw holes 45 provided in the coupling portion 44.

  The heat spreader 4 is made of a metal having high thermal conductivity, such as aluminum, and conducts and dissipates heat generated in the white LED 30. One surface of the upper portion 41 of the heat spreader 4 is in contact with the light source module 3, and the other surface is in contact with the holding frame 5.

  As shown in FIG. 8, the holding frame 5 is formed of a metal plate, for example, a steel plate, and a lower member 51, a left member 52, an upper member 53, and a right member 54 are coupled by screws. It has a rectangular frame shape. The holding frame 5 holds the liquid crystal panel 1, the light guide plate 2, and the like.

  FIG. 9 is a perspective view of the lower part of the member 51 constituting the holding frame 5 as viewed from the left side. The lower side of FIG. 9 is the front side of the liquid crystal television. 10 is a cross-sectional view taken along the line XX in FIG. FIG. 11 is a partial perspective view of the rear side of the member 51 in the lower portion of the holding frame 5 on which the heat spreader 4 is placed as viewed from the left side.

  The member 51 includes a plate-like portion 51a extending upward from the lower side parallel to the liquid crystal panel 1 as a mounting portion, and a plate-like portion 51b extending to the front side. Further, the member 51 includes a plate-like portion 51c continuous upward and extending upward, a back side thereof, that is, a portion 51d projecting toward the surface of the light guide plate 2 that contacts the liquid crystal panel 1, and a plate-like portion extending upward. A portion 51e is provided. The member 51 includes a strip-shaped connecting portion 51g extending further upward from the plate-like portion 51e and a connecting portion 51f protruding to the back side at both ends in the left-right direction.

  As shown in FIG. 11, plate-like portions 51 a and 51 b of the member 51 are portions that come into contact with the heat spreader 4. The screw holes 51 h provided in the member 51 are holes through which screws for fixing the backlight chassis 9 and the heat spreader 4 to the member 51 pass.

  The connection part 51g of the member 51 is for connecting the member 51 and the other member 52 or 54 which comprises the holding frame 5 with a screw.

  Next, a method for assembling the liquid crystal television according to the first embodiment will be described. In the following description, the liquid crystal television is assembled with the front side down.

  First, the holding frame 5 is placed on the front cabinet 6. The liquid crystal panel 1 is placed so that the outer edge of the liquid crystal panel 1 contacts the inner edge portion of the holding frame 5. Further, the lens system sheet group 7, the light guide plate 2, and the light reflection sheet 8 are placed on the liquid crystal panel 1. Further, the heat spreader 4 to which the light source module 3 is fixed is placed on a surface parallel to the side edge of the light guide plate 2 of the member 51 of the holding frame 5. Further, the backlight chassis 9 is mounted and fixed to the front cabinet 6 with screws 61. The heat spreader 4 placed on the holding frame body 5 is screwed in a form sandwiched between the holding frame body 5 and the backlight chassis 9.

  The tuner unit 16, the image processing unit 17, and the power supply control unit 18 are fixed to the backlight chassis 9, the rear cabinet 12 is covered, and the front cabinet 6 is fixed with screws.

  FIG. 12 is an exploded perspective view of the liquid crystal television in the first embodiment. A state in which the front cabinet 6, the holding frame 5, the heat spreader 4, and the backlight chassis 9 are fixed with screws 61 is shown. A holding frame 5 is placed on the front cabinet 6. The heat spreader 4 to which the light source module 3 is fixed is placed on the holding frame 5. The backlight chassis 9 is fixed to the front cabinet 6 with the heat spreader 4 and the holding frame 5 interposed therebetween.

  The tuner unit 16, the image processing unit 17, the power supply control unit 18, and the rear cabinet 12 are omitted.

  Next, the case of referring to the rank information 34 of the white LED 30 will be described. When referring to the rank information, first, the rear cabinet 12 is removed from the liquid crystal television. Next, the tuner unit 16, the image processing unit 17, and the power supply control unit 18 are removed from the backlight chassis 9. Further, as shown in FIG. 12, the screws 61 are removed, and the backlight chassis 9 is removed. In this state, the heat spreader 4 can be detached from the holding frame 5.

  FIG. 13 is a partial perspective view of the light source module 3 and the heat spreader 4 as viewed from below. FIG. 14 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as viewed from below.

  As shown in FIG. 13A, rank information 34 is described at the end of the base substrate 31 corresponding to the position on the back side of the connector 32. As shown in FIG. 13B, the heat spreader 4 is provided with a window portion 46.

  As shown in FIG. 14, by providing the heat spreader 4 with the window portion 46, it is possible to easily refer to the rank information 34 of the light source module 3 without removing the light source module 3 from the heat spreader 4. When the rank information 34 is only the identification information corresponding to the rank, the light emission characteristic information is obtained by searching a database in which the rank identification information and the light emission characteristic information of the white LED 30 are associated with each other.

  As described above, when the rank information 34 of the light source module 3 is confirmed by repair / inspection, it is possible to prevent the base substrate 31 from being damaged due to the removal of the light source module 3 from the heat spreader 4.

  Further, since the place where the rank information 34 is described is the back surface of the base substrate 31 corresponding to the connector 32, the place where the rank information 34 is described can be easily specified using the connector 32 as a mark.

  Furthermore, since the place where the rank information 34 is written is the end of the base substrate 31, the place where the rank information 34 is written can be easily specified.

  The rank information is described as a character string composed of a bar code, a two-dimensional code, a pictogram, or alphanumeric characters, but may be other information as long as it represents the rank information. A seal describing the rank information may be attached to the base substrate 31. Although it is not visible with the naked eye under visible light, it may be described with fluorescent ink or fluorescent paint that shines when irradiated with ultraviolet rays. Further, the surface of the substrate may be processed and represented by a surface uneven pattern.

  The characteristic information of the white LED 30 corresponding to the rank is chromaticity, luminance, etc., but is not limited thereto, and may include relative color temperature, color rendering properties, and luminous efficiency. Furthermore, it is not limited to light emission characteristics, and electrical characteristics (rated voltage, current consumption, etc.) may be included.

  The shape of the heat spreader 4 is not limited to the above, and the following shapes can also be adopted.

Modification 1
In the first embodiment described above, the dimension of the heat spreader 4 in the longitudinal direction is approximately twice the dimension of the light source module 3 in the longitudinal direction. Therefore, the two light source modules 3 are mounted on substantially the entire surface of the heat spreader 4 extending in the longitudinal direction. In the first modification, the heat spreader 4 is shorter than that described above. FIG. 15 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from the side. The end portion of the light source module 3 to which the connector 32 is attached protrudes from the heat spreader 4. Since the connector 32 portion generates little heat, the portion corresponding to the connector 32 has a structure without a heat spreader.

  In Modification 1, it is possible to reduce the number of members by eliminating the portion corresponding to the connector 32 of the light source module 3 in the heat spreader 4. Further, there is an advantage that the rank information 34 on the opposite surface of the connector 32 of the light source module 3 can be easily read. The other points are the same as in the above-described embodiment, and thus description thereof is omitted.

Modification 2
In the above-described first embodiment, rank information 34 is described on the opposite surface of the connector 32 of the light source module 3. The window part 46 is provided in the heat spreader 4 so that the rank information 34 can be read without removing the light source module 3 from the heat spreader 4.

  In the second modification, in order to make it easier to read the rank information 34, the window portion 46 extends over a plurality of surfaces of the heat spreader 4. FIG. 16 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from the side. Rank information 34 is written on the opposite surface of the light source module 3 to the connector 32. Even when the light source module 3 is attached to the heat spreader 4, the heat spreader 4 is provided with a window portion 46 so that the rank information 34 can be read. In the second modification, the window 46 is connected not only to the surface on which the rank information 34 is described but also to the other surface of the heat spreader 4 so as to extend over a plurality of surfaces. Since the window 46 extends over a plurality of surfaces of the heat spreader 4, it becomes easy to read the rank information 34 of the light source module 3 attached to the heat spreader 4. This is particularly effective when the content of the description cannot be determined unless the rank information 34 is read by a reader such as a barcode or a two-dimensional barcode.

Modification 3
In the first embodiment described above, the window part 46 is provided in the heat spreader 4. When the window portion 46 is provided, a part of the corresponding surface of the heat spreader 4 is removed. In the third modification, the plate-like portion to be cut out is not removed in order to provide the window portion 46, but a part is left connected to the heat spreader 3 main body. FIG. 17 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from the side. The plate-like portion 46 a cut out to provide the window portion 46 is folded inside while being connected to the heat spreader 4.

  As shown in FIG. 11, since the heat spreader 4 is coupled to the member 51 constituting the holding frame 5, the heat spreader 4 is fitted to the cut-out plate-like portion 46a at a position corresponding to the cut-out plate-like portion 46a of the member 51. A hole is to be provided.

  In the third modification, instead of completely removing the plate-like portion 46a cut out to form the window 46, a part of the plate-like portion 46a remains connected to the main body of the heat spreader 4, so that the cut-out plate-like portion 46a is also connected to the light source module 3. It plays the role of dissipating the heat generated in the. Moreover, since the hole which fits with the cut-out plate-shaped part 46a is provided in the position corresponding to the cut-out plate-like part 46a of the member 51, and the said hole and the cut-out plate-like part 46a fit, the heat spreader 4 is assembled at the time of assembly. Can be positioned.

Modification 4
In the first embodiment and the third modification described above, the window portion 46 is provided in the heat spreader 4 so that the rank information 34 described in the light source module 3 can be seen in a state where the light source module 3 is attached to the heat spreader 4. Is provided. In the modification 4, it is set as the structure which not the window part 46 but the front-end | tip of the heat spreader 4 is notched. FIG. 18 is a partial perspective view of the heat spreader 4 on which the light source module 3 is placed as seen from the side. A notch 48 is formed by notching the front end of the heat spreader 4 so as to be U-shaped. By forming the notch 48, the rank information 34 described in the light source module 3 can be read. On the other hand, unlike the first modification, since the member remains at the front end portion of the heat spreader 4, the front end portion of the light source module 3 can also be held by the heat spreader 4.

  The shape of the notch 48 is a U-shape, but is not limited thereto, and may be a piercing shape or a fork shape.

  In the above description, the number of the light source modules 3 mounted on the heat spreader 4 is not particularly mentioned, but may be one or plural. In the case of a plurality, it is preferable to use two in consideration of the position of the connector 32. In that case, the light source module 3 has a symmetrical configuration. That is, when the two light source modules 3 are fixed to the heat spreader 4, the heat spreader 4 is configured to be symmetrical with respect to the longitudinal center and the short direction. As shown in FIG. 6, the one light source module 3 has a connector 32 on the left side of the liquid crystal television. The other light source module that is symmetric to the light source module has a connector located on the right side of the liquid crystal television.

  The heat spreader 4 and the holding frame 5 are screwed. However, the heat spreader 4 and the holding frame 5 may be fixed with an adhesive or a double-sided tape.

  Further, in order to increase the amount of heat conducted from the heat spreader 4 to the holding frame 5, a heat conductive sheet (heat conductor) formed of silicon, acrylic resin, carbon fiber or the like is interposed between the heat spreader 4 and the holding frame 5. It is good also as a structure interposed in. Furthermore, a heat conductive sheet may be interposed between the heat spreader 4 and the backlight chassis 9.

  In the above description, the heat spreader 4 is made of aluminum. However, the heat spreader 4 is not limited thereto, and any material having good heat conductivity may be used. For example, iron or stainless steel. From the viewpoint of dissipating heat more efficiently, silver, copper, and the like are preferable, but aluminum, iron, or stainless steel is preferably used in consideration of cost, strength, and ease of processing.

  Although the holding frame 5 and the backlight chassis 9 are made of steel plates, aluminum, iron, or stainless steel may be used in order to dissipate the heat of the white LED 30 better.

  It should be understood that the above-described embodiment is illustrative in all respects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Light guide plate 3 Light source module 30 White LED
31 Base board 32 Connector 34 Rank information 4 Heat spreader 46 Window part 5 Holding frame 51a, 51b Plate-shaped part (mounting part)
6 Front cabinet 9 Backlight chassis 12 Rear cabinet

Claims (7)

A substrate on which a light emitting element that supplies light to a display panel that displays an image on the front side is mounted on one surface;
A display device comprising: a heat dissipating body to which the substrate is fixed;
Information on the light emitting element is described on the other surface of the substrate,
An opening is provided at a position corresponding to a position where the information is described on a surface of the heat radiating body on which the substrate is fixed. A connector connected to a conductive wire for supplying power to the light emitting element is attached to one surface of the substrate,
The display device according to claim 1, wherein the information is written on the other surface of the substrate corresponding to the fixed position of the connector. The display device according to claim 1, wherein the information is written on an end portion of the substrate. A display device according to claim 1;
And a tuner for receiving television broadcasts,
An image of a television broadcast received by the tuner unit is displayed on the display device. In the heat sink attached to the substrate on which the light-emitting element that supplies light to the display panel that displays the image on the front side is mounted on one side and information on the light-emitting element is described on the other side,
An opening is provided at a position corresponding to a position where the information is described. A connector connected to a conductive wire for supplying power to the light emitting element is attached to one surface of the substrate,
The heat radiating plate according to claim 5, wherein the information is written on the other surface of the substrate corresponding to the fixing position of the connector. The heat radiating plate according to claim 5 or 6, wherein the information is written on an end portion of the substrate.

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