JP2013037332A - Display unit, electronic instrument and illumination equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display unit, an electronic instrument and illumination equipment capable of effectively releasing heat from a light-emitting device even if a frame is formed around the light-emitting device or a light guide plate.SOLUTION: In illumination equipment 8 of a display unit 100, heat from a light-emitting device 89 is released by a light source substrate 88, a light source supporting member 60 made of metal and a first frame 40 made of metal. Further, the illumination equipment 8 includes a second frame 30 made of resin. The second frame 30 zones a closed space 8a between the light source supporting member 60 and the second frame. The closed space 8a is extended in an extending direction of the light source supporting member 60. The second frame 30 has an opening communicating with the closed space 8a. The first frame 40 and a third frame 50 each have an opening at a position overlapping with the opening of the second frame 30. Accordingly, the heat from the light-emitting device 89 can be released through the closed space 8a and the openings.

Description

  The present invention relates to a display device including a lighting device and a display panel, an electronic apparatus including the display device, and the lighting device.

  Among various types of display devices, the liquid crystal device includes a lighting device called a backlight device, and a transmissive or transflective display panel (liquid crystal panel) disposed on the light emitting surface side of the illuminating device. In the illuminating device, a plurality of light emitting elements are provided along a side end surface of the light guide plate that serves as a light incident portion (see Patent Documents 1 to 3).

  In the lighting device having such a configuration, when the temperature of the light emitting element rises, the light emission efficiency of the light emitting element is reduced, the luminance is uneven, and the lifetime is reduced. Therefore, it is preferable to provide a metal light source support member on the light source substrate on which the light emitting element is mounted, and to release heat through the light source support member.

Japanese Patent Laid-Open No. 2002-229022 JP 2009-3081 A JP2011-40388A

  When assembling the lighting device, when attaching the lighting device alone to the device, or when configuring the display device by providing a display panel for the lighting device, it is preferable to store the light source support member, the light guide plate, etc. in the frame. In many cases, the frame includes at least a part of an end plate that covers the light source support member on the upper side and a side plate that surrounds the light source support member and the light guide plate on the outside. According to such a frame, since it is easy to provide the positioning part of each member, etc., it is possible to improve the efficiency of the assembly work and to improve the positional accuracy between the members.

  However, in the lighting device, although heat radiation from the light emitting element is important, the use of a frame has a problem that heat radiation from the light emitting element is lowered.

  In view of the above problems, an object of the present invention is to provide a display device that can efficiently release heat of the light emitting element even when a frame is provided around the light emitting element or the light guide plate, and an electronic apparatus including the display device And providing a lighting device.

  In order to solve the above-mentioned problem, the present invention is a display device having a lighting device and a display panel disposed on the light emitting surface side of the lighting device, wherein the lighting device includes a light guide plate, A plurality of light emitting elements arranged along the light incident portion with the light emitting surface facing the side end surface of the light guide plate as the light incident portion, and extending along the light incident portion. A light source substrate on which one of the plurality of light emitting elements is mounted, and a substrate holding surface on which the other surface of the light source substrate is in surface contact, and extends along the light incident portion. A light source support member, and a frame including a side plate portion that is disposed outside the light source support member and the light guide plate, and that forms a closed space between the light source support member and the light source support member. The lighting device is provided with an opening for communicating the closed space with the outside. It is characterized in that is.

  In the present invention, the lighting device includes a plurality of light emitting elements arranged along the light incident portion of the light guide plate, and the plurality of light emitting elements are mounted on one surface side of the light source substrate extending along the light incident portion. Has been. Here, since the metal light source support member is disposed so as to overlap the other surface side of the light source substrate, the heat of the light emitting element can be released through the light source substrate and the light source support member. In the present invention, a frame having a side plate portion is used for the purpose of improving the efficiency of assembly work and improving the positional accuracy between members. However, since the lighting device is provided with an opening that allows the closed space to communicate with the outside, the heat of the light emitting element can be released through the closed space and the opening. Therefore, according to the present invention, even when a frame is used, the heat of the light emitting element can be efficiently released.

  In the present invention, a metal first frame that supports the light guide plate on a side opposite to the light emitting surface, and an end plate portion that holds the display panel and covers the light emitting surface side of the light source support member. A resin-made second frame, wherein at least one of the first frame and the second frame is the frame, and the opening is formed in at least one of the first frame and the second frame. The provided configuration can be employed. In the present invention, the second frame made of resin is used for the purpose of improving the efficiency of assembly work and improving the positional accuracy between members, but the above-described frames (the first frame and the second frame) are used. Since at least one of the openings is provided, the heat of the light emitting element can be released through the closed space and the opening. Therefore, according to the present invention, the heat of the light emitting element can be efficiently released even when the second frame made of resin is used.

  In this case, the second frame is the frame, and the first frame includes a side plate portion that overlaps the side plate portion of the second frame, and the first frame includes the opening of the second frame. It is preferable that an opening penetrating the side plate portion of the first frame is provided at a position overlapping the portion. According to such a configuration, the heat of the light emitting element can be released through the closed space, the opening of the second frame (opening of the frame), and the opening of the first frame.

  In the present invention, the third frame has an end plate portion that overlaps the end plate portion of the second frame on the outside, and a third frame that includes a side plate portion that overlaps the side plate portion of the second frame on the outside, It is preferable that an opening that penetrates the side plate portion of the third frame is provided at a position overlapping the opening of the second frame. According to this configuration, heat of the light emitting element can be released through the closed space, the opening of the second frame (opening of the frame), the opening of the first frame, and the opening of the third frame.

  In this invention, while covering the said light-projection surface side of the said display panel with the metal 1st flame | frame which supports the said light-guide plate on the opposite side to the said light-projection surface, it is the said light source between the said 1st frame. A third frame arranged with a support member interposed therebetween, and at least one of the first frame and the third frame is the frame, and at least one of the first frame and the third frame A configuration in which the opening is provided on one side can be employed. In the present invention, the above frames (the first frame and the third frame) are used for the purpose of improving the efficiency of assembly work and improving the positional accuracy between members. An opening is provided in at least one of the frames. Since the portion is provided, the heat of the light emitting element can be released through the closed space and the opening.

  In the present invention, it is possible to adopt a configuration in which the opening is provided in a side plate portion disposed at a position where an extension line of the closed space abuts among the side plate portions of the frame. According to such a configuration, since air easily enters and exits the closed space, the heat of the light emitting element can be efficiently released through the closed space and the opening.

  In this invention, you may employ | adopt the structure currently formed in the part which comprises the said closed space among the said side plate parts of the said frame for the said opening part.

  In this invention, it is preferable that the said opening part is provided in several places spaced apart in the extension direction of the said closed space. According to such a configuration, since air easily enters and exits the closed space, the heat of the light emitting element can be efficiently released through the closed space and the opening.

  In this invention, it is preferable that the opening area of the said opening part is more than the opening area of the said closed space. According to such a configuration, the heat of the light emitting element can be efficiently released through the closed space and the opening.

  In this invention, it is preferable that the said opening part has a predetermined | prescribed width dimension in the extension direction of the said side-plate part of the said flame | frame. According to this configuration, since the opening has a large opening area unlike the slit-shaped gap, the heat of the light emitting element can be efficiently released through the closed space and the opening.

  In the present invention, of the side end surfaces of the light guide plate, two opposing side end surfaces are the light incident portions, and the closed space and the opening are provided at two locations corresponding to the two side end surfaces. The configuration can be adopted.

  In this case, of the closed spaces provided in the two locations, the opening provided in one of the closed spaces is formed in a portion of the side plate portion of the frame that constitutes the closed space, The opening provided in the other closed space may employ a configuration provided in a side plate portion of the side plate portion of the frame that is disposed at a position where an extension line of the closed space abuts. . According to such a configuration, the position and direction of the opening of the second frame can be set under conditions optimal for the usage mode of the display device.

  In the present invention, the light source substrate may employ a configuration in which the one surface faces the light incident portion. The present invention may also be applied to the light source substrate when the one surface is oriented in a direction intersecting the light incident part.

  The display device according to the present invention can be used in various electronic devices such as a television.

  Moreover, the lighting device according to the present invention includes a light guide plate and a plurality of light emitting elements arranged along the light incident portion with a light emitting surface facing a side end surface of the light guide plate that is a light incident portion. An element, a light source substrate that extends along the light incident portion, and the plurality of light emitting elements are mounted on one surface side, and a substrate holding surface on which the other surface of the light source substrate is in surface contact. A metal light source support member extending along the light incident part, and disposed outside the light source support member and the light guide plate, and passes along the light incident part between the light source support member and the light source support member. A frame having a side plate portion constituting the closed space and an opening for communicating the closed space with the outside are provided.

  In the present invention, the lighting device includes a plurality of light emitting elements arranged along the light incident portion of the light guide plate, and the plurality of light emitting elements are mounted on one surface side of the light source substrate extending along the light incident portion. Has been. Here, since the metal light source support member is disposed so as to overlap the other surface side of the light source substrate, the heat of the light emitting element can be released through the light source substrate and the light source support member. In the present invention, a frame having a side plate portion is used for the purpose of improving the efficiency of assembly work and improving the positional accuracy between members. However, since the lighting device is provided with an opening that allows the closed space to communicate with the outside, the heat of the light emitting element can be released through the closed space and the opening. Therefore, according to the present invention, even when a frame is used, the heat of the light emitting element can be efficiently released.

It is explanatory drawing of the liquid crystal television (electronic device) provided with the display apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the whole structure of the display apparatus which concerns on Embodiment 1 of this invention. It is a disassembled perspective view when the display apparatus which concerns on Embodiment 1 of this invention is disassembled further finely. It is sectional drawing of the principal part of the display apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the light emitting element, the light source substrate, etc. which were used for the illuminating device of the display apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the illuminating device of the display apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing of the penetration part provided in the illuminating device of the display apparatus which concerns on Embodiment 3 of this invention. It is explanatory drawing of the penetration part provided in the illuminating device of the display apparatus which concerns on Embodiment 4 of this invention. It is sectional drawing of the principal part of the display apparatus which concerns on Embodiment 5 of this invention.

  An embodiment in which the present invention is applied to a display device for a liquid crystal television will be described with reference to the drawings. In the drawings to be referred to in the following description, the scales are different for each layer and each member so that each layer and each member have a size that can be recognized on the drawing. In the following description, one of the directions intersecting with each other in the in-plane direction of the light guide plate or the liquid crystal panel (the direction in which the long sides of the light guide plate or the liquid crystal panel shown in FIG. The direction in which the short sides of the light guide plate and the liquid crystal panel shown) extend as the Y-axis direction, and the direction intersecting the X-axis direction and the Y-axis direction (the direction in which the light guide plate and the liquid crystal panel shown in FIG. Axial direction. In the drawings referred to below, one side in the X-axis direction is the X1 side, the other side is the X2 side, and one side in the Y-axis direction (the direction in which the protruding portion of the liquid crystal panel is arranged) is the Y1 side. The other side facing this is the Y2 side, one side in the Z-axis direction (the direction facing the back of the light guide plate) is the Z1 side (lower side), and the other side (illumination light or display light is opposite) The outgoing side) is represented as the Z2 side (upper side).

[Embodiment 1]
(overall structure)
FIG. 1 is an explanatory diagram of a liquid crystal television (electronic device) including a display device according to Embodiment 1 of the present invention, and FIGS. 1 (a) and 1 (b) schematically show the appearance of the liquid crystal television. It is explanatory drawing and a block diagram which shows the electric constitution of a display apparatus.

  An electronic device 2000 illustrated in FIG. 1A is a liquid crystal television, and includes a display device 100, a television frame 2010, and the like. As shown in FIG. 1B, the display device 100 supplies an image signal to the display panel 10 (liquid crystal panel), which will be described later with reference to FIG. The image signal supply unit 270 and the illumination device 8 that is arranged on the back surface of the display panel 10 and supplies illumination light are provided. The display device 100 includes a scanning line driving circuit 104 that drives scanning lines extending in the X-axis direction on the display panel 10 and a data line driving circuit that drives data lines extending in the Y-axis direction on the display panel 10. 101. For the scanning line driving circuit 104 and the data line driving circuit 101, a configuration in which both are incorporated in the display panel 10 can be adopted. One of the scanning line driving circuit 104 and the data line driving circuit 101 is built in the display panel 10, and the other is built in a driving IC mounted on the display panel 10 in a COG manner or electrically connected to the display panel 10. The configuration incorporated in the driving IC mounted on the circuit board or the configuration in which both the scanning line driving circuit 104 and the data line driving circuit 101 are incorporated in the driving IC separate from the display panel 10 are adopted. be able to.

  In this embodiment, the illuminating device 8 includes a light guide plate 80 disposed so as to overlap the display panel 10 and a plurality of light emitting elements disposed along the side end surface of the light guide plate 80 that is the light incident portion 80a. The element 89 (a plurality of light emitting elements 89 in which the side end face of the light incident portion and the light emitting surface / light emitting surface are arranged to face each other), a light source substrate 88 on which the plurality of light emitting elements 89 are mounted, and the light emitting element 89 are driven. A light source driving unit 280. In each of the plurality of light emitting elements 89, the light emitting surface is opposed to the side end surface of the light guide plate 80 that is the light incident portion 80 a. The display panel 10 is quadrangular and has four sides 10a, 10b, 10c, and 10d. Of these sides 10a, 10b, 10c and 10d, the side 10a is a long side located on one side Y1 in the Y-axis direction, and the side 10b is a long side located on the other side Y2 in the Y-axis direction. 10c is a short side located on the other side X2 in the X-axis direction, and a side 10d is a short side located on one side X1 in the X-axis direction. Corresponding to this shape, the light guide plate 80 has four side end surfaces 801, 802, 803, and 804. Of these side end faces 801 to 804, the side end face 801 is located on the long side of one side Y1 in the Y-axis direction, the side end face 802 is located on the short side of the other side X2 in the X-axis direction, and the side end face 803 is The side end surface 804 is located on the short side of the one side X1 in the X-axis direction, and is located on the long side of the other side Y2 in the Y-axis direction.

(Specific Configuration of Display Device 100)
FIG. 2 is an explanatory diagram showing the overall configuration of the display device 100 according to Embodiment 1 of the present invention, and FIGS. 2A and 2B are a perspective view and an exploded perspective view of the display device 100, respectively. FIG. 3 is an exploded perspective view when the display device 100 according to the first embodiment of the present invention is further finely disassembled. 4 is a cross-sectional view of a main part of the display device 100 according to Embodiment 1 of the present invention. FIGS. 4A and 4B show the display device 100 taken along the line AA ′ of FIG. It is sectional drawing when cut | disconnecting along a line, and sectional drawing when the display apparatus 100 is cut | disconnected along the BB 'line of Fig.1 (a).

  2, 3, and 4, the display device 100 of the present embodiment is generally a lighting device 8 that is called a so-called backlight device, and a transmissive display panel 10 that is disposed on the upper surface of the lighting device 8. And. In this embodiment, the display panel 10 is a transmissive liquid crystal panel. In the display device 100, the lighting device 8 holds a metal first frame 40 (lower metal frame) disposed so as to cover the back surface of the light guide plate 80, and an end of the display panel 10 above the first frame 40. In addition, a resin-made second frame 30 (resin frame) that surrounds and holds the lighting device 8 and a metal-made third frame 50 (on the other side Z2 in the Z-axis direction) of the second frame 30 ( Upper metal frame).

  The second frame 30 has a rectangular frame shape that holds the end of the display panel 10 and surrounds the display panel 10. In this embodiment, the second frame 30 is formed on four sides of the display panel 10. Correspondingly, it is composed of four frame plates 31 to 34 divided for each side. In the present embodiment, the second frame 30 is black, and functions as a light absorbing member, thereby preventing stray light from being generated in the lighting device 8. Each of the frame plates 31 to 34 extends inward from the upper side edges of the side plate portions 311, 321, 331, and 341 and the side plate portions 311, 321, 331, and 341 that extend downward on the outer surface side of the frame plates 31 to 34. The bent upper plate portions 315, 325, 335, and 345 (end plate portions), and the protruding plate portions 312, 322, 332, and 342 projecting inward from midway in the height direction of the upper plate portions 315, 325, 335, and 345 And. For this reason, step portions (steps) 313 to 343 are formed on the inner side of the frame plates 31 to 34 with the upper plate portion by the protruding plate portions 312, 322, 332, 342, and the step portions 313, 323 are formed. 333, 343 and the protruding plate portions 312, 322, 332, 342 hold the display panel 10. Further, the light guide plate 80 and the light emitting element 89 of the lighting device 8 are disposed below the protruding plate portion 312.

  The first frame 40 is formed by pressing a thin metal plate such as a SUS plate. The first frame 40 includes a bottom plate portion 45 and three side plate portions 42 to 44 that rise from three outer peripheral edges excluding one side Y1 in the Y-axis direction among the outer peripheral edges of the bottom plate portion 45, and Is a rectangular box with an opening. The side plate portions 321, 331, and 341 of the second frame 30 overlap the outside of the side plate portions 42 to 44 of the first frame 40. Further, the side plate portion 311 of the second frame 30 covers one side Y1 of the first frame 40 in the Y-axis direction.

  Similarly to the first frame 40, the third frame 50 is formed by pressing a thin metal plate such as a SUS plate. The third frame 50 includes a rectangular upper plate portion 55 (end plate portion) and four side plate portions 51 to 54 bent downward from the outer peripheral edge of the upper plate portion 55, and has a rectangular shape with an open lower surface. It has a frame shape. The side plate portions 51 to 54 are stacked so as to cover the outside of the side plate portions 311, 321, 331, 341 of the second frame 30. A rectangular window 550 that emits light emitted from the display panel 10 is formed in the upper plate portion 55, and the upper plate portion 55 covers the entire outer peripheral end portion of the display light emission side of the display panel 10. It covers all around. Further, the upper plate portion 55 of the third frame 50 is installed so as to completely cover the upper plate portions 315, 325, 335, and 345 (end plate portions) of the second frame 30 at the same time.

  The third frame 50, the second frame 30, and the first frame 40 configured as described above are coupled by bolts (not shown) or the like, and are held in a state where the display panel 10 and the lighting device 8 are housed inside. Here, as shown in FIG. 4, flexible sheets 71 and 72 are attached to the lower surface and the upper surface of the protruding plate portions 312, 322, 332, and 342 of the second frame 30. For this reason, when the display device 100 is assembled, the display panel 10 is supported by the protruding plate portions 312, 322, 332, 342 via the flexible sheet 72. Further, when the display device 100 is assembled, the optical sheets (the diffusion sheet 182, the prism sheets 183, 184, etc.) of the lighting device 8 are suppressed so as not to be lifted or misaligned via the flexible sheet 71. .

(Configuration of display panel 10)
As shown in FIGS. 2, 3, and 4, the display panel 10 has a quadrangular planar shape, and an element substrate 11 on which pixel electrodes (not shown) and the like are formed, and the element substrate 11. And a counter substrate 12 disposed to face each other with a predetermined gap, and a sealing material 14 for bonding the counter substrate 12 and the element substrate 11 together. In the display panel 10, the liquid crystal layer 13 is held in a region surrounded by the sealing material 14. The element substrate 11 and the counter substrate 12 are made of a light-transmitting substrate such as a glass substrate. In the element substrate 11, a plurality of scanning lines (not shown) extend in the X-axis direction, while a plurality of data lines extend in the Y-axis direction. A switching element (not shown) and a pixel electrode are provided corresponding to the intersection with the pixel electrode.

  In this embodiment, the counter substrate 12 is disposed on the display light emission side, and the element substrate 11 is disposed on the illumination device 8 side. Further, a frame layer (not shown) made of a light shielding layer is formed on the surface of the counter substrate 12 facing the element substrate 11 along the inner edge of the sealing material 14. The display panel 10 is configured as a liquid crystal panel of a TN (Twisted Nematic) method, an ECB (Electrically Controlled Birefringence) method, or a VAN (Vertical Aligned Nematic) method, and a pixel electrode is formed on the element substrate 11. A common electrode (not shown) is formed. When the display panel 10 is an IPS (In Plane Switching) type or FFS (Fringe Field Switching) type liquid crystal panel, the common electrode is provided on the element substrate 11 side. Further, the element substrate 11 may be disposed on the display light emission side with respect to the counter substrate 12. An upper polarizing plate 18 is disposed on the upper surface of the display panel 10, and a lower polarizing plate 17 is disposed between the lower surface of the display panel 10 and the lighting device 8.

  In this embodiment, the element substrate 11 is larger than the counter substrate 12. For this reason, the element substrate 11 has a protruding portion 110 protruding from the end portion of the counter substrate 12 on one side Y1 in the Y-axis direction, and a plurality of flexible wiring substrates 200 are formed on the upper surface of the protruding portion 110. It is connected. The flexible wiring board 200 is connected to a circuit board 250 made of a rigid board, and the circuit board 250 has a control IC (not shown) constituting the image signal supply unit 270 described with reference to FIG. In addition, a light source driving IC (not shown) constituting the light source driving unit 280 is mounted.

(Configuration of lighting device 8)
FIG. 5 is an explanatory diagram of the light emitting element 89 and the light source substrate 88 used in the illumination device 8 of the display device 100 according to the first embodiment of the present invention.

  As shown in FIGS. 3, 4, and 5, the illuminating device 8 has the light guide plate 80 disposed so as to overlap the lower surface side of the display panel 10 and the light emitting surface 89 a facing the light incident portion 80 a of the light guide plate 80. And a plurality of light emitting elements 89 arranged from one end side (one side X1 in the X-axis direction) of the light incident portion 80a toward the other end side (the other side X2 in the X-axis direction). In this embodiment, the plurality of light emitting elements 89 are mounted on one surface 881 of the light source substrate 88 extending in the X axis direction along the light incident portion 80a. The light emitting element 89 is an LED (Light Emitting Diode) that emits white light, and emits light source light as divergent light.

  In the illumination device 8 of this embodiment, of the side end surfaces 801, 802, 803, and 804 of the light guide plate 80, two side end surfaces 801 and 803 that face each other in the Y-axis direction are used as the light incident portion 80a. For this reason, the plurality of light emitting elements 89 are disposed with the light emitting surface 89a facing the two light incident portions 80a (side end surfaces 801 and 803) of the light guide plate 80, and the two light incident portions 80a (side end surfaces 801 and 803). ) Are arranged from one end side to the other end side. The light source substrate 88 is arranged in a state extending along each of the two light incident portions 80a (side end surfaces 801 and 803), and one surface 881 of each of the two light source substrates 88. A plurality of light-emitting elements 89 are mounted on. A connector 87 is mounted on one end 881 of the light source substrate 88, and the connector 87 is used to supply a drive current to the light emitting element 89 via the light source substrate 88. Yes.

  In this embodiment, the light guide plate 80 is a translucent resin plate made of acrylic resin, polycarbonate resin, or the like, and a reflection sheet 187 is provided between the lower surface 80 c of the light guide plate 80 and the bottom plate portion 45 of the first frame 40. They are placed one on top of the other. In addition, optical sheets such as a diffusion sheet 182 and prism sheets 183 and 184 are stacked between the upper surface (light emitting surface 80 b) of the light guide plate 80 and the display panel 10. In this embodiment, the two prism sheets 183 and 184 are arranged so that their ridge lines are orthogonal to each other. Therefore, the illumination light emitted from the light emitting surface 80b of the light guide plate 80 has a peak in the front direction of the display panel 10 by the two prism sheets 183 and 184 after being diffused in all directions by the diffusion sheet 182. Such directivity is given. In the light guide plate 80, the surface on which the reflection sheet 187 is located is formed with a concave fine depression or a scattering pattern composed of a printed layer of a scattering member. In this embodiment, the density of the scattering pattern is light emission. The height increases as the distance from the element 89 increases. For this reason, the intensity distribution of the illumination light emitted from the light guide plate 80 is made uniform regardless of the distance from the light emitting element 89. In this embodiment, as the scattering pattern, a large number of fine concave portions are provided on the lower surface 80 c of the light guide plate 80.

  The bottom plate portion 45 of the first frame 40 has a gap between the lower surface 80c of the light guide plate 80 and the first frame 40 in a region that overlaps the side where the side end surfaces 801 and 803 serving as the light incident portions 80a in the light guide plate 80 are located. Is partially formed so as to be secured, and is bent toward the light guide plate 80. Accordingly, the reflection sheet 187 and the lower plate portion 61 of the light source support member 60 can be sandwiched between the lower surface 80 c of the light guide plate 80 and the bottom plate portion 45. Further, since the bottom plate portion 45 of the first frame 40 is partially bent toward the light guide plate 80, a recess is formed on the back side of the first frame 40, so that the bottom surface of the bottom plate portion 45 of the first frame 40 is formed. The flexible wiring board 200 is bent and extended to the (rear side), and the circuit board 250 is disposed in the recess so as to be accommodated within the depth of the recess. For this reason, thickness reduction of the illuminating device 8 can be achieved.

  In this embodiment, the light source substrate 88 is disposed so that one surface 881 on which the light emitting element 89 is mounted faces the light incident portion 80 a of the light guide plate 80. The light source substrate 88 has a structure in which a wiring pattern and a land are provided together with an insulating layer on one surface 881 side of a plate-like metal plate 887 extending along the light incident portion 80a. Such a configuration can be realized, for example, by attaching a flexible wiring board 888 in which a resin base material layer, a wiring pattern, an insulating protective layer, and the like are laminated in this order on one surface 881 side of the metal plate 887. Therefore, the land on which the metal plate 887, the wiring pattern, and the chip of the light emitting element 89 are mounted is electrically insulated. In this embodiment, the metal plate 887 is made of an aluminum plate, and the metal plate 887 ensures the mechanical strength of the light source substrate 88 and also functions as a heat radiating plate for heat generated from the light emitting element 89.

  Here, a light source support member 60 that holds the light source substrate 88 is disposed on the other surface 882 side of each light source substrate 88, and the light source support member 60 includes the first frame 40 and the second frame 30. Is placed and held between. In the present embodiment, the light source support member 60 is a rod-shaped metal part extending along the other surface 882 of the light source substrate 88, and the entire surface of the other surface 882 of the light source substrate 88 and the substrate holding surface of the support plate portion 62. At 620, it is fixed in close contact in a surface contact state. The light source support member 60 includes a lower plate portion 61 that overlaps the bottom plate portion 45 of the first frame 40, and a support plate portion 62 that forms a wall surface protruding upward from a midway position in the width direction of the lower plate portion 61. doing. Further, the light source support member 60 has an upper plate 63 bent from the support plate 62 to the side opposite to the side where the light guide plate 80 is located on the upper end (side opposite to the lower plate 61) side of the support plate 62. The upper plate portion 63 is fixed to at least one of the upper plate portion 55 of the third frame 50 and the upper plate portions 315 and 325 of the second frame 30 with screws or the like.

  In the light source support member 60 having such a configuration, the surface of the support plate portion 62 on the side where the light guide plate 80 is located is a substrate holding surface 620 that holds the light source substrate 88, and the substrate holding surface 620 includes a light source. A substrate 88 is fixed by screws (not shown) or the like.

(Heat dissipation structure from light emitting element 89)
In the lighting device 8 configured as described above, when the temperature of the light emitting element 89 rises, the light emitting efficiency of the light emitting element 89 decreases, the luminance unevenness, and the lifetime decrease. Therefore, in this embodiment, first, the light source support member 60 made of metal is provided on the other surface 882 side (back side) of the light source substrate 88 on which the light emitting element 89 is mounted in a state where surface contact is possible, and the light source support member Heat is released to the first frame 40 via 60.

  On the other hand, in this embodiment, the upper plate portions 315, 325, 335, which are arranged so as to cover the light emitting surface side of the light source support member 60, for the purpose of improving the efficiency of assembly work and improving the positional accuracy between members, etc. 345 (end plate portion), and the resin-made second frame 30 including the side plate portions 311, 321, 331, and 341 that surround the light source support member 60 and the light guide plate 80 on the outside are used. 30 has low thermal conductivity.

  Therefore, in the present embodiment, as shown in FIG. 4, the second frame 30 defines a closed space 8 a between the light source support member 60, and the closed space 8 a extends in the direction in which the light source support member 60 extends. Extends along. In this embodiment, since no side plate portion is provided on one side Y1 in the Y-axis direction in the first frame 40, as shown in FIG. 4A, a closed space formed on one side Y1 in the Y-axis direction. 8a is a closed space 8a surrounded by the lower plate portion 61, the support plate portion 62 and the upper plate portion 63 of the light source support member 60, and the side plate portion 311 of the second frame 30 (and a part of the upper plate portion 315). Is configured. On the other hand, since the side plate portion 42 is provided on the other side Y2 in the Y-axis direction in the first frame 40, as shown in FIG. 4B, it is formed on the other side Y2 in the Y-axis direction. The closed space 8a includes a lower plate portion 61, a support plate portion 62, and an upper plate portion 63 of the light source support member 60, a side plate portion 42 of the first frame 40 (and a part of the upper plate portion 325 of the second frame 30). The closed space 8a surrounded by is constituted. As can be seen from FIGS. 2 and 3, both the one side Y1 in the Y-axis direction and the other side Y2 in the Y-axis direction have second ends (extension lines) in the extending direction of the closed space 8a. The side plate portions 331 and 341 of the frame 30, the side plate portions 43 and 44 of the first frame 40, and the side plate portions 53 and 54 of the third frame 50 are located.

  Further, in this embodiment, when the closed space 8a is communicated with the outside, as shown in FIGS. 2 and 3, the extending direction (extension line) of the closed space 8a is provided at each of both ends in the X-axis direction of the closed space 8a. A notch-shaped opening 409 penetrating the side plate portions 43, 44 is formed in the side plate portions 43, 44 of the first frame 40 that abut on each other. Further, at each of both ends in the X-axis direction of the closed space 8a, cuts that penetrate the side plate portions 331 and 341 to the side plate portions 331 and 341 of the second frame 30 that abut in the extending direction (extension line) of the closed space 8a. A notch-shaped opening 309 is formed. Further, at each of both ends of the closed space 8a in the X-axis direction, the side plates 53 and 54 of the third frame 50 that abut in the extending direction (extension line) of the closed space 8a are cut through the side plates 53 and 54. A notch-shaped opening 509 is formed. Further, the opening 409 of the first frame 40 and the opening 509 of the third frame 50 overlap with the opening 309 of the second frame 30. Therefore, as shown in FIG. 2, when the lighting device 8 is assembled, a penetrating portion 809 that penetrates the first frame 40, the second frame 30, and the third frame 50 is formed in the lighting device 8. Reference numeral 809 is configured to communicate with the closed space 8a at both ends in the extending direction of the closed space 8a and open toward the extending direction (extension line) of the closed space 8a. In this embodiment, each of the penetrating portions 809 is opened with a predetermined width dimension in the extending direction of the side plate portions 331 and 341 of the second frame 30 and has a large opening area unlike the slit-shaped gap. . Therefore, in this embodiment, the opening area of the penetrating portion 809 is set to be equal to or larger than the opening area (cross-sectional area) of the closed space 8a.

  Therefore, as indicated by an arrow H in FIG. 1A, in the illumination device 8 and the display device 100 of this embodiment, the heat of the light emitting element 89 is transmitted through the light source support member 60 and the closed space 8a (through portion 809 ( The openings 309, 409, and 509) can be released to the outside, and the heat is then released from the television frame 2010 to the outside of the electronic device 2000.

(Main effects of this form)
As described above, in the illumination device 8 and the display device 100 of the present embodiment, the plurality of light emitting elements 89 are arranged along the light incident portion 80a of the light guide plate 80, and the plurality of light emitting elements 89 are arranged in the light incident portion 80a. Is mounted on the one surface 881 side of the light source substrate 88 extending along the surface. Here, since the light source support member 60 made of metal is stacked on the other surface 882 side of the light source substrate 88, the heat of the light emitting element 89 is transferred to the light source substrate 88, the light source support member 60, and the metal first. It can be escaped by one frame 40.

  In this embodiment, the upper plate portions 315, 325, 335, and 345 (end plate portions) covering the light emission surface side with respect to the light source support member 60, and the side plates that surround the light source support member 60 and the light guide plate 80 on the outside. The resin-made second frame 30 provided with the parts 311, 321, 331, and 341 is used, and the second frame 30 has low thermal conductivity. However, the second frame 30 defines a closed space 8 a extending along the extending direction of the light source support member 60 between the second frame 30 and the second frame 30. An opening 309 that penetrates the 30 side plate portions 331 and 341 and communicates with the closed space 8a is provided. For this reason, the heat of the light emitting element 89 can be released through the closed space 8 a and the opening 309. The first frame 40 includes side plate portions 43 and 44 that overlap the side plate portions 331 and 341 of the second frame 30, but the side plate portions 43 and 44 of the first frame 40 have openings of the second frame 30. An opening 409 is formed at a position overlapping the portion 309. The third frame 50 includes side plate portions 53 and 54 that overlap the side plate portions 331 and 341 of the second frame 30, but the side plate portions 53 and 54 of the third frame 50 have openings in the second frame 30. An opening 509 is formed at a position overlapping the portion 309. For this reason, since the illuminating device 8 is formed with the penetrating portion 809 communicating with the closed space 8a, the heat of the light emitting element 89 can be released through the closed space 8a and the penetrating portion 809. Therefore, since the heat generation of the light emitting element 89 can be suppressed to a low level, it is possible to suppress the occurrence of a decrease in light emission efficiency, luminance unevenness, lifetime reduction, and the like.

  Further, since the through portions 809 (opening portions 309, 409, and 509) are provided at a plurality of locations that are separated in the extending direction of the closed space 8a, air easily enters and exits the closed space 8a. In particular, in this embodiment, the penetrating portions 809 (openings 309, 409, 509) are provided at both ends in the extending direction of the closed space 8a and open toward the extension line of the closed space 8a. Air enters and exits easily in the closed space 8a. Therefore, the heat of the light emitting element 89 can be efficiently released through the closed space 8a and the penetrating portion 809, so that the heat generation of the light emitting element 89 can be kept low.

[Embodiment 2]
6 is an explanatory diagram of the illumination device 8 of the display device 100 according to the second embodiment of the present invention. FIGS. 6A and 6B are explanatory diagrams of the penetrating portion 809 and the vicinity of the penetrating portion 809. FIG. It is sectional drawing. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  In the first embodiment, in both of the closed spaces 8a configured on both sides in the Y-axis direction (the side where the plurality of light emitting elements 89 are arranged), at both ends in the extending direction of the closed space 8a, An opening is formed by penetrating the side surface of each frame corresponding to the part where the closed space 8a extends along the extended line. On the other hand, in this embodiment, as shown in FIG. 6A, of the two closed spaces 8a formed on both sides in the Y-axis direction, on the other side Y2 in the Y-axis direction (above the TV screen). In the formed closed space 8a, the penetrating portions 809 are open upward at both ends in the extending direction of the closed space 8a and intersecting the extending direction of the closed space 8a. According to such a configuration, the property that heat easily escapes upward corresponds to the opening direction of the penetrating portion 809 provided on the other side Y2 in the Y-axis direction, so that the heat of the light emitting element 89 is efficiently released. be able to.

  Here, in the closed space 8a formed on the other side Y2 in the Y-axis direction, a configuration in which the penetrating portion 809 opens in the upward direction intersecting with the extending direction of the closed space 8a is illustrated in FIG. As described above, this can be realized by providing openings 309, 409, and 509 in the side plate portion 42 of the first frame 40, the side plate portion 321 of the second frame 30, and the side plate portion 52 of the third frame 50.

[Embodiment 3]
FIG. 7 is an explanatory diagram of the through portion 809 provided in the illumination device 8 of the display device 100 according to Embodiment 3 of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, in any of the two closed spaces 8a formed on both sides in the Y-axis direction, the through portions 809 are provided at both ends of the closed space 8a, although the opening directions are different.

  On the other hand, in this embodiment, as shown in FIG. 7, among the two closed spaces 8 a formed on both sides in the Y-axis direction, the closed space 8 a formed on the other side Y <b> 2 in the Y-axis direction penetrates. The portion 809 is provided on the side plate portions 42, 321, and 52 of the first frame 40, the second frame 30, and the third frame 50 described with reference to FIG. 3 and the like at a midway position in the extending direction of the closed space 8a. It is formed by the opening. According to such a configuration, the property that heat easily escapes upward corresponds to the opening direction of the penetrating portion 809 formed on the other side Y2 in the Y-axis direction (the upper side of the television screen). The heat can be released efficiently. In addition, if the penetrating portion 809 formed on the other side Y2 (upper side) in the Y-axis direction opens upward in the middle of the extending direction of the closed space 8a, for example, a television frame 2010 is used. In the case where a vent hole is provided on the inner side from the end in the X-axis direction, the opening position of the through portion 809 can correspond to the position of the vent hole of the television frame 2010.

[Embodiment 4]
FIG. 8 is an explanatory diagram of the penetrating portion 809 provided in the illumination device 8 of the display device 100 according to Embodiment 4 of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, in any of the two closed spaces 8a formed on both sides in the Y-axis direction, the penetrating portion 809 is in the middle of the extending direction of the closed space 8a, and the extending direction of the closed space 8a. You may employ | adopt the structure opened to the direction which cross | intersects. According to such a configuration, for example, in the television frame 2010, when the vent hole is provided inward from the end in the X-axis direction, the opening position of the through portion 809 is the position of the vent hole of the television frame 2010. It can be made to correspond.

[Embodiment 5]
FIG. 9 is a cross-sectional view of a main part of the display device 100 according to Embodiment 5 of the present invention. FIGS. 9A and 9B are cross-sectional views taken along lines AA ′ and BB ′ shown in FIG. It corresponds to a cross section. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  In the first to fourth embodiments described above, the one surface 881 on which the light emitting element 89 is mounted on the light source substrate 88 is configured to face the light incident portion 80a of the light guide plate 80. As shown in FIG. 9, one surface 881 on the light source substrate 88 on which the light emitting element 89 is mounted is oriented in a direction intersecting the light incident portion 80 a of the light guide plate 80 at an angle of 90 °. . However, the light emitting element 89 has the light emitting surface 89 a oriented in a direction parallel to the one surface 881 of the light source substrate 88. Accordingly, the light emitting element 89 can cause the light source light to enter the light guide plate 80 from the light incident portion 80a.

  Also in the display device 100 and the lighting device 8 having such a configuration, the second frame 30 defines a closed space 8a between the light source support member 60 and the closed space 8a, as in the first to fourth embodiments. The light source support member 60 extends along the extending direction. Also in the present embodiment, as in the first to fourth embodiments, the through portion 809 (see FIGS. 1 to 3 and the like) communicating with the closed space 8a is formed, so that the heat generated in the light emitting element 89 is efficiently used. I can escape well.

  In the present embodiment, in the light source support member 60, the substrate holding surface 620 is formed on the lower plate portion 61, and faces the direction that intersects the light incident portion 80 a of the light guide plate 80 at an angle of 90 °. ing. In the light source support member 60, the vertical plate portion 68 that stands vertically from the support plate portion 62 faces the light incident portion 80 a of the light guide plate 80. For this reason, as shown in FIG. 9A, the closed space 8a formed on one side Y1 in the Y-axis direction includes a lower plate portion 61, a vertical plate portion 68, and an upper plate portion 63 of the light source support member 60. The second frame 30 is partitioned by a side plate portion 311 and an upper plate portion 315. On the other hand, as shown in FIG. 9B, the closed space 8a formed on the other side Y2 in the Y-axis direction includes a lower plate portion 61, a vertical plate portion 68, and an upper plate portion 63 of the light source support member 60. And the upper plate portion 325 of the second frame 30 and the side plate portion 42 of the first frame 40. As can be seen from FIGS. 2 and 3, the side plate of the second frame 30 is disposed at both ends in the extending direction of the closed space 8a on both the one side Y1 in the Y-axis direction and the other side Y2 in the Y-axis direction. The portions 331 and 341, the side plate portions 43 and 44 of the first frame 40, and the side plate portions 53 and 54 of the third frame 50 are located, and openings 309, 409, and 509 are formed in these side plate portions.

[Other embodiments]
In the above embodiment, the side plate portion on the long side of the first frame 40 is provided as the side plate portion 42 only on the other side Y2 in the Y axis direction, but both long side sides (Y axis of the first frame 40) Side plate portions may be provided on one side Y1 and the other side Y2) of the direction. In this case, the AA ′ cross section shown in FIG. 4A is generally configured as shown in FIG. In addition, a configuration in which the side plate portions are not provided on both long sides (one side Y1 and the other side Y2 in the Y-axis direction) of the first frame 40 may be employed. In this case, the configuration shown in FIG. The BB ′ cross section is generally configured as shown in FIG.

  In the above embodiment, the opening area of the penetrating portion 809 (opening portions 309, 409, 509) may be the same as the cross-sectional area (opening area) of the closed space 8a shown in FIG. It is preferable that the opening areas of the openings 309, 409, and 509) are larger than the cross-sectional area (opening area) of the closed space 8a shown in FIG.

  In the above embodiment, the penetrating portion 809 is provided on the extension line of the closed space 8a. However, as long as the penetrating portion 809 and the closed space 8a are spatially connected, they may be provided at positions shifted from each other. For example, a space is provided between the side end surface 802 of the light guide plate 80 and the side end surface 43 of the first frame 40, and between the side end surface 804 of the light guide plate 80 and the side end surface 44 of the first frame 40, and the through portion 809 and the closed space 8a. May be connected spatially. According to such a configuration, the heat radiation effect can be maintained even if the penetrating portion 809 does not exist on the extension line of the closed space 8a. In this case, the penetrating portion 809 (openings 309, 409, and 509) can be separated from the frame corner portion, the strength of the frame corner portion can be increased, and the rigidity of the display device 100 can be improved.

  Further, when the penetrating portion 809 (opening) and the closed space 8a are spatially connected, the penetrating portion 809 and the closed space 8a can be formed by setting the area of the penetrating portion 809 (opening) larger than the cross-sectional area of the closed space 8a. It is also possible to increase the heat dissipation effect using the space between the two.

  Further, the through portion 809 (opening) may be used as an opening for routing a cable for supplying power to the light emitting element 89. In this case, it is not necessary to separately provide an opening through which the cable passes. Both the wiring and the heat radiation can be realized without reducing the strength of the display device 100.

  In the above embodiment, the penetrating portion 809 (opening) is provided only on the side end face of the display device 100. The penetrating portion 809 may be provided on the other side Z2) or on the back side (one side Z1 in the Z-axis direction). In this case, for example, it is possible to dissipate heat by arranging an opening on the back surface of the display device 100 or the like. Moreover, the opening part provided in the side end surface may be connected with the opening part provided in the adjacent surface, and you may improve the thermal radiation effect by making it open more widely.

  In the above embodiment, the first frame 40, the second frame 30, and the third frame 50 are provided. However, the present invention may be applied to the case where the first frame 40 and the second frame 30 are provided. In this case as well, an opening may be provided in the side plate of the frame constituting the closed space 8a (at least one of the side plate of the first frame 40 and the side plate of the second frame 30).

  Further, the present invention may be applied to the case where the first frame 40 and the third frame 50 are provided. In this case, the side plate portion of the frame constituting the closed space 8a (the side plate portion of the first frame 40 and the third frame portion) may be used. An opening may be provided in at least one of the side plate portions of the frame 50.

[Example of mounting on electronic devices]
In the above-described embodiment, the liquid crystal television is exemplified as the electronic device 2000 on which the display device 100 is mounted. You may use the display apparatus 100 which applied this invention to the display part.

  8 .. Lighting device 10 .. Display panel 30.. Second frame 40.. First frame 42, 43, 44 .. Side plate part of first frame 50.. Third frame 51, 52 , 53, 54... Side plate portion of third frame, 55.. Upper plate portion (end plate portion) of third frame, 60... Light source support member, 80 .. Light guide plate, 80 a. ..Light emitting surface, 88 ..Light source substrate, 89 ..Light emitting element (light source), 100 ..Display device, 309, 409, 509 ..Opening part, 311, 321, 331, 341. Side plate portions, 315, 325, 335, 345... Upper plate portion (end plate portion) of second frame.

Claims (15)

A display device comprising: an illumination device; and a display panel disposed on the light emitting surface side of the illumination device.
The lighting device includes:
A light guide plate;
Among the side end surfaces of the light guide plate, a plurality of light emitting elements arranged along the light incident portion with the light emitting surface facing the side end surface that is the light incident portion,
A light source substrate that extends along the light incident portion and on which the plurality of light emitting elements are mounted;
A metal light source support member having a substrate holding surface with which the other surface of the light source substrate is in surface contact, and extending along the light incident portion;
A frame including a side plate portion that is disposed outside the light source support member and the light guide plate and forms a closed space between the light source support member and the light source support member;
Have
The lighting device is provided with an opening that communicates the closed space with the outside. A first metal frame that supports the light guide plate on the side opposite to the light exit surface;
A resin-made second frame that holds the display panel and has an end plate portion that covers the light emitting surface side of the light source support member;
Is provided,
At least one of the first frame and the second frame is the frame;
The display device according to claim 1, wherein the opening is provided in at least one of the first frame and the second frame. The second frame is the frame;
The first frame includes a side plate portion that overlaps the side plate portion of the second frame,
The display device according to claim 2, wherein the first frame is provided with an opening that penetrates the side plate portion of the first frame at a position overlapping the opening of the second frame. . An end plate portion that overlaps the end plate portion of the second frame on the outside, and a third frame that includes a side plate portion that overlaps the side plate portion of the second frame on the outside;
The display device according to claim 3, wherein the third frame is provided with an opening that penetrates the side plate portion of the third frame at a position overlapping the opening of the second frame. . A first metal frame that supports the light guide plate on the side opposite to the light exit surface;
A third frame that covers the light emission surface side of the display panel and is disposed with the light source support member sandwiched between the first frame and the first frame;
Is provided,
At least one of the first frame and the third frame is the frame;
The display device according to claim 1, wherein the opening is provided in at least one of the first frame and the third frame.   The said opening part is provided in the side-plate part arrange | positioned among the said side-plate parts of the said flame | frame at the position where the extension line of the said closed space abuts, It is any one of Claim 2 thru | or 5 characterized by the above-mentioned. The display device described.   The display device according to claim 2, wherein the opening is formed in a portion of the side plate portion of the frame that forms the closed space.   The display device according to claim 7, wherein the openings are provided at a plurality of locations that are separated in the extending direction of the closed space.   The display device according to claim 1, wherein an opening area of the opening is equal to or larger than an opening area of the closed space.   The display device according to claim 1, wherein the opening has a predetermined width dimension in an extending direction of the side plate portion of the frame. Of the side end surfaces of the light guide plate, two opposing side end surfaces are the light incident portions,
The display device according to claim 1, wherein the closed space and the opening are provided at two locations corresponding to the two side end surfaces. Of the enclosed spaces provided at the two locations,
The opening provided in one of the closed spaces is formed in a portion of the side plate portion of the frame that constitutes the closed space,
The said opening provided in the other said closed space is provided in the side plate part arrange | positioned in the position where the extension line of the said closed space collides among the said side plate parts of the said frame. 11. The display device according to 11.   The display device according to claim 1, wherein the one surface of the light source substrate faces the light incident portion.   An electronic apparatus comprising the display device according to claim 1. A light guide plate;
Among the side end surfaces of the light guide plate, a plurality of light emitting elements arranged along the light incident portion with the light emitting surface facing the side end surface that is the light incident portion,
A light source substrate that extends along the light incident portion and on which the plurality of light emitting elements are mounted;
A metal light source support member having a substrate holding surface with which the other surface of the light source substrate is in surface contact, and extending along the light incident portion;
A frame having a side plate portion that is disposed outside the light source support member and the light guide plate and forms a closed space that is passed along the light incident portion between the light source support member;
An opening for communicating the closed space to the outside;
A lighting device is provided.

Images