JP2013037333A - 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 making display quality reduction less noticeable, the display quality reduction due to a positioning structure for positioning a light source substrate with a plurality of light-emitting devices mounted on one side, even if the positioning structure is exposed on the one side of the light source substrate.SOLUTION: In illumination equipment 8 of a display unit, a plurality of light-emitting devices 89 are mounted on one surface 881 of a light source substrate 88, and the light source substrate 88 is supported by screws 86 made of metal at a light source supporting member 60. The plurality of light-emitting devices 89 are divided into a plurality of groups G, and an amount of emitting light is switched by each group. The head of the screw 86 is exposed on a side of the one surface 881 of the light source substrate 88, but the screw 86 is provided between neighboring groups G. Accordingly, even if there occurs a portion where emission light intensity of the illumination light is inconsistent due to the screw 86, the display quality reduction due to such inconsistency is less noticeable.

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 the side end surface of the light guide plate as the light incident portion (see Patent Document 1).

  In the illuminating device having such a configuration, when the light emitting elements are arranged with respect to the light guide plate, for example, as shown in FIGS. In many cases, 89 is mounted, and the light source substrate 88 is fixed to the metal light source support member 60 with screws 86. At that time, in Patent Document 1, the screw 86 is fixed from the light source support member 60 side. However, the screw 86 from the one surface 881 side of the light source substrate 88 is used because of space limitations in the surrounding area and ease of work. You may have to stop.

  On the other hand, a local dimming technique has been proposed in which a plurality of light emitting elements 89 are grouped and the intensity of emitted light from the illumination device is controlled for each region by controlling the intensity of emitted light for each group. According to the technology, it is possible to improve contrast and improve moving image performance.

JP 2009-3081 A

  However, as shown in FIGS. 10A and 10B, when the screw 86 is stopped from the one surface 881 side of the light source substrate 88, the portion where the screw 86 is disposed in the longitudinal direction of the light source substrate 88. The surface condition will be different on both sides. As a result, there is a problem that luminance unevenness occurs in the illumination light and the degradation of image quality is conspicuous. In particular, when the light emitting elements 89 are grouped into a plurality of groups G (groups Ga, Gb, Gc...) In the longitudinal direction of the light source substrate 88 and the intensity of emitted light is controlled for each group G, , The surface (structural shape, unevenness, step, surface roughness, color, material) state of the screw 86 is different from the surface state in other parts, so that the light scattering state or the reflection state is discontinuous, or Causes non-uniformity, resulting in a distribution (unevenness) in the amount of light taken from the light incident surface of the light guide plate. As a result, luminance uniformity cannot be obtained as a planar (plate-like) lighting device, and the image There is a problem that the deterioration of the quality is conspicuous.

  Such a problem occurs in the same manner even when, for example, the portion where the screw 86 is provided is the recess 886 and the screw head is not protruded from the one surface 881 side of the light source substrate 88. Further, in place of the screw 86, even if a structure in which the light source substrate 88 is held by a hook or a structure in which the convex portion of the light source support member 60 is fitted in a hole provided in the light source substrate 88 is adopted, As long as the positioning structure such as the convex portion is exposed on the one surface side of the light source substrate, the above problem occurs.

  In view of the above problems, the problem of the present invention is that a positioning structure for positioning a light source substrate on which a plurality of light emitting elements are mounted on one surface side is exposed on one surface side of the light source substrate. However, an object of the present invention is to provide a display device, an electronic device including the display device, and a lighting device that can make the deterioration in display quality due to the positioning structure inconspicuous.

  In order to solve the above-described problems, the present invention provides a display device having a lighting device and a display panel disposed on the light emission surface side of the lighting device, the lighting device including the display device. A light guide plate arranged on the panel and an arrangement from one end side to the other end side of the light incident portion with a light emitting surface facing a side end surface of the light guide plate as a light incident portion among the side end surfaces of the light guide plate And a plurality of light emitting elements divided into a plurality of groups from the one end side toward the other end side, and a light source drive for controlling a light emission amount for each of the groups in conjunction with driving the display panel A light source substrate on which one of the plurality of light emitting elements is mounted, a light source support member disposed to overlap the other surface side of the light source substrate, and a group adjacent to each other among the plurality of groups Between the light source substrates. Characterized in that it and a positioning structure for positioning the substrate the light source to the light source supporting member in a state at least partly exposed at surface side.

  In the present invention, in the lighting device, a plurality of light emitting elements are mounted on one surface of the light source substrate, and the light source substrate is supported by the light source support member on the other surface side by the positioning structure. In addition, the plurality of light emitting elements are divided into a plurality of groups, and the light source driving unit switches the light emission amount for each group in conjunction with the driving of the display panel, and the emitted light intensity of the illumination light from the illumination device is changed for each region. To control. Here, since at least a part of the positioning structure is exposed on one surface side of the light source substrate, the surface state of the one surface of the light source substrate is different from the region where the positioning structure is located. However, the positioning structure is provided between the adjacent groups. For this reason, even if a location where the intensity of the emitted light of the illumination light is discontinuous with the surroundings due to the positioning structure is generated, the intensity of the emitted light of the illumination light from the illumination device is controlled in the discontinuous portion. Because it is located between the areas, it is inconspicuous. Therefore, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous due to the positioning structure, the deterioration in display quality due to the discontinuity is not noticeable.

  In the present invention, the positioning structure may be, for example, a screw that is fixed from the one surface side of the light source substrate. According to such a configuration, in addition to the positioning of the light source substrate, it can also be fixed.

  In the present invention, in the group, it is preferable that the light emitting elements are arranged at equal intervals from the one end side toward the other end side. According to this configuration, when light source light emitted from light emitting elements belonging to the same group is emitted as illumination light, the light intensity distribution is uniform in such illumination light.

  In the present invention, the plurality of light emitting elements may employ a configuration that is provided at equal intervals from the one end side toward the other end side.

  In this invention, you may employ | adopt the structure from which the space | interval of the said light emitting element in the said group differs from the space | interval of the said adjacent light emitting elements which belong to an adjacent group among these groups.

  In the present invention, it is preferable that the light source substrate extends integrally from the one end side toward the other end side. According to this configuration, it is easy to assemble the lighting device. In the present invention, the light source substrate may be divided between adjacent groups among the plurality of groups.

  The display device according to the present invention is used in an electronic apparatus such as a liquid crystal television.

  The illuminating device according to the present invention is directed to a light guide plate and a side end surface of the light guide plate toward a side end surface that is a light incident portion, with a light emitting surface facing toward the other end side from the one end side of the light incident portion. A plurality of light emitting elements that are arranged and divided into a plurality of groups from the one end side toward the other end side, a light source driving unit that controls a light emission amount for each group, and the plurality of light emitting elements Is provided between adjacent groups among the plurality of groups, the light source substrate mounted on one surface side, the light source support member disposed to overlap the other surface side of the light source substrate, and the light source And a positioning structure that positions the light source substrate on the light source support member in a state in which at least a part is exposed on one side of the substrate.

  In the present invention, the plurality of light emitting elements are mounted on one surface of the light source substrate, and the light source substrate is supported by the light source support member on the other surface side by the positioning structure. In addition, the plurality of light emitting elements are divided into a plurality of groups, and the light source driving unit switches the amount of light emission for each group and controls the intensity of emitted light from the illumination device for each region. Here, since at least a part of the positioning structure is exposed on the one surface side, the surface state of the one surface of the light source substrate is different from the other region where the positioning structure is located. However, the positioning structure is provided between adjacent groups. For this reason, even if a location where the intensity of the emitted light of the illumination light is discontinuous with the surroundings due to the positioning structure is generated, the intensity of the emitted light of the illumination light from the illumination device is controlled in the discontinuous portion. Because it is located between the areas, it is inconspicuous.

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 light emitting element, the board | substrate for light sources, etc. which were used for the illuminating device of the display apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing of the light emitting element, the board | substrate for light sources, etc. which were used for the illuminating device of the display apparatus which concerns on Embodiment 3 of this invention. It is explanatory drawing of the light emitting element, the board | substrate for light sources, etc. which were used for 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. It is explanatory drawing of the conventional illuminating device.

  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. Further, in the following description, the corresponding portions are described with the same reference numerals so that the correspondence relationship with the configuration described with reference to FIG. 10 can be easily understood. In the following description, one direction (the direction in which the long sides of the light guide plate and the liquid crystal panel shown in the drawing extend) intersect each other in the in-plane direction of the light guide plate and the liquid crystal panel is defined as the X-axis direction and the other direction. The direction in which the short sides of the light guide plate and the liquid crystal panel shown in the figure extend is the Y axis direction, and the direction intersecting the X axis direction and the Y axis direction (direction in which the light guide plate and the liquid crystal panel are laminated / thickness direction) Is the Z-axis 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 apparatus 2000 shown in FIG. 1A is a liquid crystal television, and a display device 100 used in the liquid crystal television has a transmissive display panel 10 as a display panel. As shown in FIG. 1B, the display device 100 supplies an image signal to the display panel 10 from the outside via a flexible wiring board in addition to the display panel 10 described later with reference to FIG. It has the supply part 270 and the illuminating device 8 which is arrange | positioned on the back surface of the display panel 10 and supplies illumination light. 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. In addition, 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 electrically connected to the driving IC mounted on the display panel 10 by COG or the display panel 10. A configuration built in the driving IC mounted on the circuit board 250 can be employed. Furthermore, a configuration in which both the scanning line driving circuit 104 and the data line driving circuit 101 are incorporated in a driving IC separate from the display panel 10 can be employed.

  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 light source substrate 88 on which the element 89 and the plurality of light emitting elements 89 are mounted is provided, and the light emitting surfaces of the plurality of light emitting elements 89 and the light incident portion 80a of the light guide plate 80 face each other.

  In such a display device 100, the contrast and moving image performance can be improved by controlling the intensity of the emitted light of the illumination light from the illumination device 8 for each region in correspondence with the drive on the display panel 10. . For example, the brightness of the image displayed for each of the regions 10a to 10p displayed on the display panel 10 is detected, and the light emission intensity from the lighting device 8 is high in the brightly displayed region according to the degree (degree) of the brightness. Illumination light (illumination light with high luminance) is emitted, and illumination light with low emission intensity (illumination light with low luminance) is emitted from the illuminating device 8 to a darkly displayed region. According to such a local dimming method, it is possible to improve contrast, improve moving image performance, and reduce power consumption.

  Therefore, in the display device 100 of the present embodiment, the plurality of light emitting elements 89 are divided into a plurality of groups corresponding to the plurality of regions 10a to 10p of the display panel 10, as will be described later. In addition, the display device 100 detects the brightness of the image for each of the regions 10a to 10h of the display panel 10 and the plurality of light emitting elements 89 based on the detection result of the luminance distribution detection unit 290. The light source drive unit 280 controls the intensity of the emitted light for each group, and the light source drive unit 280 supplies the same drive current to the light emitting elements 89 belonging to the same group. For example, the luminance distribution detection unit 290 is configured in the same control IC 260 as the image signal supply unit 270.

(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, FIG. 2 (a) is a perspective view of the display device 100, and FIG. 2 (b) is an exploded perspective view. It is. 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. FIG. 4 is a cross-sectional view of a main part of the display device 100 according to Embodiment 1 of the present invention.

  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. It has a transmissive liquid crystal panel. In addition, the display device 100 includes a resin frame 30 made of resin that holds the display panel 10 and the lighting device 8 inside, and a lower side of the resin frame 30 (on the side opposite to the display surface / one side Z1 in the Z-axis direction). A metallic, box-like lower frame 40 and a metallic, frame-like upper frame 50 arranged on the upper side of the resin frame 30 (the display surface side / the other side Z2 in the Z-axis direction) are provided. Yes.

  The resin frame 30 has a rectangular frame shape surrounding the display panel 10 and supports an end portion of the outer peripheral portion of the display panel so as to be positioned. In this embodiment, the resin frame 30 is composed of four frame plates 31 to 34 that are divided for each of the four sides of the display panel 10. In this embodiment, the resin frame 30 is black and functions as a light absorbing member to prevent stray light from being generated in the lighting device 8. Each of the frame plates 31 to 34 has side plate portions 311, 321, 331, and 341 extending downward (thickness / height direction) on the outer surface side of the frame plates 31 to 34, and the height direction of the frame plates 31 to 34. Protruding plate portions 312, 322, 332, and 342 projecting inward from the inner surfaces of the frame plates 31 to 34 from the middle position. For this reason, step portions 313, 323, 333, and 343 are formed inside the frame plates 31 to 34 by the protrusion portions 312, 322, 332, and 342, and the step portions 313, 323, 333, and 343 and the protrusion plates The display panel 10 is positioned by holding and holding at the stepped portions by the portions 312, 322, 332, and 342. 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 lower frame 40 is formed by pressing a thin metal plate such as a SUS plate. The lower frame 40 includes a bottom plate portion 45 and four side plate portions 41 to 44 erected from the outer peripheral edge of the bottom plate portion 45, and has a rectangular box shape with an upper surface opened. The side plate portions 311 to 341 of the resin frame 30 overlap the outside of the side plate portions 41 to 44 of the lower frame 40.

  Similarly to the lower frame 40, the upper frame 50 is formed by pressing a thin metal plate such as a SUS plate. The upper frame 50 includes an upper plate portion 55 having a flat frame shape (flat plate frame shape) and four side plate portions 51 to 54 bent downward from the outer peripheral edge of the upper plate portion 55 (in the thickness direction of the display device). The upper plate portion (upper surface) is opened corresponding to the display areas (10a to 10p) of the display panel 10, and the lower plate has a structure opened wider than this by the side plate portion. The side plate portions 51 to 54 overlap the outside of the side plate portions 311, 321, 331, 341 of the resin frame 30. A rectangular opening 550 for emitting light emitted from the display panel 10 is formed in the upper plate portion 55, and the upper plate portion 55 has an outer peripheral end portion on the display light emission side of the display panel 10. Covers the entire circumference.

  The upper frame 50, the resin frame 30, and the lower frame 40 configured as described above are coupled by bolts (not shown) or the like, and hold the display panel 10 and the lighting device 8 inside. Here, flexible sheets 71 and 72 made of a material having a coefficient of friction larger than that of the resin frame 30 are attached to the lower surface and the upper surface of the protruding plate portions 312, 322, 332, and 342 of the resin 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, and 342 via the flexible sheet 72 and is abutted and fixed so as not to easily cause a positional shift. ing. Further, when the display device 100 is assembled, the optical sheet (the diffusion sheet 182, the prism sheets 183, 184, etc.) of the lighting device 8 is supported via the flexible sheet 71, and the positional deviation is less likely to occur. It is touched and fixed.

(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 arranged 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 projecting portion 110 projecting from one end of the counter substrate 12 in the Y-axis direction, and the flexible wiring substrate 200 is connected to the upper surface of the projecting portion 110. The flexible wiring board 200 has a structure in which a plurality of flexible wiring boards are connected, and is connected to a circuit board 250 (PCB board). Therefore, the control IC 260 that constitutes the image signal supply unit 270 described with reference to FIG. 1 and the light source drive IC (not shown) that constitutes the light source drive unit 280 are connected to the circuit board 250 or the flexible wiring board 200. Has been implemented. Further, the control IC constituting the image signal supply unit 270 may be COG mounted on the upper surface of the protruding portion 110 of the display panel 10.

(Configuration of lighting device 8)
FIG. 5 is an explanatory diagram of the light emitting element 89, the light source substrate 88, and the like used in the illumination device 8 of the display device 100 according to Embodiment 1 of the present invention, and FIGS. ) Is a perspective view of the light emitting element 89 and the like when viewed from one surface of the light source substrate 88 (the surface on which the light emitting element 89 is mounted), and the direction in which the light source substrate 88 extends (long rectangular side). FIG. 6 is an explanatory diagram when the light emitting element 89 and the like are viewed from a direction orthogonal to the direction (short side direction / width direction), and an explanatory diagram showing a lighting state of the light emitting element 89.

  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). That is, the plurality of light emitting elements 89 are arranged in a direction facing the light incident portion 80a in the direction in which the light incident portion 80a of the light guide plate 80 extends. 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 as light source 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 have the light emitting surface 89a directed to the two light incident portions 80a (side end surfaces 801 and 803) of the light guide plate 80, and each of the two light incident portions 80a (side end surfaces 801 and 803). They are arranged in a line from one end side to the other end side. Further, the light source substrate 88 disposed corresponding to each of the two light incident portions 80a (side end surfaces 801 and 803) facing each other is along the direction in which the light incident portion 80a (side end surfaces 801 and 803) extends. Each has a rectangular shape extending, and a plurality of light emitting elements 89 are mounted on one surface 881 of each light source substrate 88. On one surface 881 of the light source substrate 88, a connector 87 is mounted on one end corresponding to a corner of the light guide plate 80 (corner of the display panel 10). The connector 87 is connected to the light source substrate 88. It is used to supply a drive current to the light emitting element 89 via the.

  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 overlapped between the lower surface 80 c of the light guide plate 80 and the bottom plate portion 45 of the lower frame 40. Optical sheets such as a diffusion sheet 182 and prism sheets 183 and 184 are stacked between the upper surface (light emitting surface 80b) 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. For this reason, the illumination light emitted from the light exit surface 80b of the light guide plate 80 is diffused in all directions by the diffusion sheet 182, and then the illumination brightness is increased in the front direction of the display panel 10 by the two prism sheets 183 and 184. Directivity with a peak is given. In the light guide plate 80, the surface on the side where the reflection sheet 187 is located is formed with a concave fine depression by laser processing or the like, and a scattering pattern made of a printed layer of a scattering member. The density increases as the distance from the light emitting element 89 increases. For this reason, the intensity distribution (luminance 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. As such a scattering pattern, in this embodiment, a fine concave recess 80e is provided on the lower surface 80c of the light guide plate 80.

  The bottom plate portion 45 of the lower frame 40 is partially between the lower surface 80c of the light guide plate 80 and the lower frame 40 in a region where the side end surfaces 801 and 803 serving as the light incident portions 80a overlap with the light guide plate 80. A step is formed so as to ensure a gap, 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 concave portion is formed on the back side of the lower frame 40 by partially bending the bottom plate portion 45 of the lower frame 40 toward the light guide plate 80, the lower surface (rear surface) of the bottom plate portion 45 of the lower frame 40. The flexible wiring board 200 is bent and extended until the circuit board 250 is connected to the flexible wiring board 200 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 metal plate 887 and the land on which the wiring pattern and the chip of the light emitting element 89 are mounted are 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 is located between the lower frame 40 and the resin frame 30. Is held in place. In this 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 holds the entire surface of the other surface 882 of the light source substrate 88 and the support plate portion 62. The surface 620 is closely attached and fixed. The light source support member 60 includes a lower plate portion 61 that overlaps the bottom plate portion 45 of the lower frame 40, and a support plate portion 62 that constitutes a wall surface that protrudes upward from an intermediate position in the width direction of the lower plate portion 61. ing. 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 of the support plate 62 (the side opposite to the lower plate 61). The upper plate portion 63 is fixed to at least one of the upper plate portion 55 of the upper frame 50 and the upper plate portion of the resin 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 which the light guide plate 80 is located is a substrate holding surface 620 that holds the light source substrate 88 in contact with the surface. A light source substrate 88 is fixed to 620 with the following structure.

(Fixing structure of light source substrate 88)
As shown in FIGS. 5A and 5B, on one surface 881 of the light source substrate 88, a plurality of light emitting elements 89 are mounted along the longitudinal direction of the light source substrate 88. In this embodiment, the plurality of light emitting elements 89 are all arranged at equal intervals. In the illuminating device 8 having such a configuration, when adopting local dimming, the plurality of light emitting elements 89 includes a plurality of unit groups G (group Ga, grouped by a plurality of light emitting elements arranged adjacent to each other in the longitudinal direction of the light source substrate 88. The light source driving unit 280 described with reference to FIG. 1 controls the intensity of emitted light (emission luminance) for each group G. FIG. 5C shows a state in which the light emitting elements 89 belonging to the groups Ga and Gc are turned on and the light emitting elements 89 belonging to the groups Gb and Gd are in an extinguished state. In this embodiment, since the plurality of light emitting elements 89 are all arranged at equal intervals, the plurality of light emitting elements 89 in the same group G are arranged at equal intervals. For this reason, when the light source light emitted from the light emitting elements 89 belonging to the same group G is emitted as illumination light, the light intensity distribution (light emission luminance distribution) is uniform in the illumination light.

  In this embodiment, the light source substrate 88 overlaps with the other surface 882 in surface contact with the substrate holding surface 620 of the light source support member 60. In this state, the light source substrate 88 is a metal as a positioning structure. The light source support member 60 is positioned and fixed by screws 86 made of. The light source support member 60 is made of metal such as aluminum or iron-based metal, and the metal plate 887 of the light source substrate 88 is in contact with the light source support member 60. For this reason, the heat generated in the light emitting element 89 is transmitted from the metal plate 887 of the light source substrate 88 to the light source support member 60, and the heat of the light source support member 60 is transmitted to the lower frame 40 and radiated. Therefore, the temperature rise of the light emitting element 89 can be suppressed low.

  Here, the screw 86 is fixed from the one surface 881 side of the light source substrate 88 toward the substrate holding surface 620 of the light source support member 60, and the head of the screw 86 is exposed on the one surface 881 of the light source substrate 88. Is in a state. The screw 86 is provided between adjacent groups G among the plurality of groups G (groups Ga, Gb, Gc...) Of the light emitting elements 89.

  More specifically, in the light source substrate 88, a through hole 885 having a slightly larger diameter than the shaft portion of the screw 86 is formed between adjacent groups G, and the light source support member 60 has a through hole 885. A screw hole 625 is formed at a position overlapping with. In this embodiment, a portion of the through hole 885 located on the one surface 881 side of the light source substrate 88 is a recess 886 having a diameter slightly larger than the head of the screw 86. For this reason, the head of the screw 86 is located inside the recess 886 and does not protrude from the one surface 881 of the light source substrate 88. Note that the screws 86 are not necessarily provided between all the adjacent groups G. In this embodiment, the screws 86 are provided at the Mab between the group Ga and the group Gb and at the Mbc between the group Gb and the group Gc. However, it is not provided in Mcd between the group Gc and the group Gd.

  5 shows the structure of one side Y1 in the Y-axis direction of the display device 100 (the side on which the frame plate 31 of the resin frame 30 is located), the other side Y2 of the display device 100 in the Y-axis direction. (The side on which the frame plate 32 of the resin frame 30 is located) has a similar structure.

(Main effects of this form)
As described above, in the illumination device 8 and the display device 100 of this embodiment, the plurality of light emitting elements 89 are mounted on the one surface 881 of the light source substrate 88, and the light source substrate 88 is made of the metal screw 86 (positioning). Is supported by the light source support member 60 on the other surface 882 side. Further, the plurality of light emitting elements 89 are divided into a plurality of groups G, and the light source driving unit 280 switches the light emission amount for each group G in conjunction with the regional brightness of the display image on the display panel 10. The emitted light intensity of the illumination light as the planar illumination device 8 is controlled for each region. Here, since at least a part (head) of the screw 86 is exposed on the one surface 881 side of the light source substrate 88, the surface state of the one surface 881 of the light source substrate 88 is the portion where the screw 86 is located. The screw 86 is provided between the adjacent groups G, which is different from other regions. For this reason, even if a portion where the illumination light emission state (light scattering state or reflection state) is discontinuous with the surroundings due to the screw 86 occurs, such a discontinuous portion is caused by the illumination device 8 in the local dimming. It is located between regions where the intensity of emitted light (light emission brightness) of illumination light is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

[Embodiment 2]
FIG. 6 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 Embodiment 2 of the present invention. Since the basic configuration of the present embodiment is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 6, also in this embodiment, a plurality of light emitting elements 89 are mounted on the one surface 881 of the light source substrate 88 along the longitudinal direction of the light source substrate 88 as in the first embodiment. Also in this embodiment, when employing local dimming in the lighting device 8, as in the first embodiment, the plurality of light emitting elements 89 are arranged in a plurality of groups G (groups Ga, Gb, Gc) in the longitudinal direction of the light source substrate 88. The light source driving unit 280 described with reference to FIG. 1 controls the intensity of emitted light for each group G.

  Here, in the first embodiment, all the light emitting elements 89 are arranged at equal intervals. However, in this embodiment, the light emitting elements 89 are arranged at equal intervals in the group G. The interval between the adjacent light emitting elements 89 belonging to the same group G is set to be different from the interval between the adjacent light emitting elements 89 belonging to the same group G. In this embodiment, the interval between the adjacent light emitting elements 89 belonging to the adjacent group G is wider than the interval between the adjacent light emitting elements 89 belonging to the same group G.

  In the illuminating device 8 configured as described above, when the light source substrate 88 is fixed to the light source support member 60 with the screw 86, the screw 86 is stopped from the one surface 881 side of the light source substrate 88, and the head of the screw 86. Is exposed in the recess 886 on one surface 881 of the light source substrate 88. Here, the screw 86 is provided between adjacent groups G among the plurality of groups G (groups Ga, Gb, Gc...) Of the light emitting elements 89. More specifically, in the light source substrate 88, screws 86 are provided between Mab and Mbc between adjacent groups G. For this reason, since the surface of the screw 86 (metal surface) arranged in a wide space (generally in the center) also has a function of reflecting a part of the light emitted from the adjacent light emitting element 89, it is hypothetical. In other words, a light source having a very small luminance (light source having a low light emission intensity) is arranged in a wide space, and the discontinuity is compensated. Further, as in the first embodiment, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous from the surroundings due to the screw 86 is generated, such a discontinuous portion is caused by the illumination light from the illumination device 8 in local dimming. Between the regions in which the intensity of the emitted light is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

[Embodiment 3]
FIG. 7 is an explanatory diagram of the light emitting element 89, the light source substrate 88, and the like used in the illumination device 8 of the display device 100 according to Embodiment 3 of the present invention. Since the basic configuration of the present embodiment is the same as that of the first and second embodiments, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 7, also in this embodiment, a plurality of light emitting elements 89 are mounted on the one surface 881 of the light source substrate 88 along the longitudinal direction of the light source substrate 88 as in the first and second embodiments. Yes. Also in this embodiment, when employing local dimming in the lighting device 8, as in the first embodiment, the plurality of light emitting elements 89 are arranged in a plurality of groups G (groups Ga, Gb, Gc) in the longitudinal direction of the light source substrate 88. The light source driving unit 280 described with reference to FIG. 1 controls the emitted light intensity (light emission luminance) for each group G. Here, the interval between adjacent light emitting elements 89 belonging to different adjacent groups G is wider than the interval between adjacent light emitting elements 89 belonging to the same group G, as in the second embodiment.

  Here, the light source substrate 88 integrally extends in the longitudinal direction in the first and second embodiments. However, in this embodiment, the light source substrate 88 is divided by Mbc between the adjacent groups G. ing. That is, in a large-sized television monitor, there are cases where a plurality of light source substrates 88 are arranged along the light incident portion 80a of the light guide plate 80 in the X-axis direction, which is the long side direction. In this case, the space between the light source substrate 88 and the light source substrate 88 adjacent thereto is equivalent to the space between the unit group G and the unit group G whose emission is controlled. Even in such a configuration, in this embodiment, when the light source substrate 88 is fixed to the light source support member 60 with the screw 86, the screw 86 is stopped from the one surface 881 side of the light source substrate 88, and the head of the screw 86 is The one surface 881 of the light source substrate 88 is exposed in the recess 886. The screw 86 is provided between adjacent groups G among the plurality of groups G (groups Ga, Gb, Gc...) Of the light emitting elements 89. More specifically, in the light source substrate 88, screws 86 are provided between Mab and Mbc between adjacent groups G. For this reason, a part of the light emitted from the adjacent light emitting elements is reflected by the surfaces (metal surfaces) of the two screws 86 arranged close to the end portions of the adjacent light source substrates 88. As a result, two light sources with very small luminance (light sources with low light emission intensity) are arranged in the corresponding positions between the adjacent light source substrates 88 in a virtually wide interval. Continuity will be supplemented. Further, as in the first embodiment, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous with the surroundings due to the screw 86 occurs, such a discontinuous portion is caused by the illumination light from the illumination device 8 in local dimming. Between the regions in which the intensity of the emitted light is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

  In this embodiment, the light source substrate 88 is divided, but the division position is Mbc between adjacent groups G. Therefore, even if a portion where the intensity of emitted light of the illumination light becomes discontinuous with the surroundings due to the divided portion of the light source substrate 88 occurs, such a discontinuous portion is not emitted from the illumination device 8 in local dimming. It is located between the areas where the light intensity is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous due to the divided portion of the light source substrate 88, the deterioration in display quality due to the discontinuity is not noticeable.

[Embodiment 4]
FIG. 8 is an explanatory diagram of the light emitting element 89, the light source substrate 88, and the like used in the illumination device 8 of the display device 100 according to Embodiment 4 of the present invention. In addition, since the basic structure of this form is the same as that of Embodiment 1-3, the same code | symbol is attached | subjected to a common part and those description is abbreviate | omitted.

  As shown in FIG. 8, also in this embodiment, a plurality of light emitting elements 89 are mounted on the one surface 881 of the light source substrate 88 along the longitudinal direction of the light source substrate 88 as in the first to third embodiments. Yes. Also in this embodiment, when employing local dimming in the lighting device 8, as in the first embodiment, the plurality of light emitting elements 89 are arranged in a plurality of groups G (groups Ga, Gb, Gc) in the longitudinal direction of the light source substrate 88. The light source driving unit 280 described with reference to FIG. 1 controls the emitted light intensity (light emission luminance) for each group G.

  In the fourth embodiment, as in the second and third embodiments, the light emitting elements 89 are arranged at equal intervals in the group G. However, the intervals between the adjacent light emitting elements 89 belonging to the adjacent group G are the same. An interval different from the interval between adjacent light emitting elements 89 belonging to the group G is set. In this embodiment, the interval between the adjacent light emitting elements 89 belonging to the adjacent group G is wider than the interval between the adjacent light emitting elements 89 belonging to the same group G.

  Further, in the light source substrate 88, a space for providing the screw 86 is provided between the end portion of the light source substrate 88 and the group Ga. This interval is called Mae between the end and the group Ga.

  In the illuminating device 8 configured as described above, when the light source substrate 88 is fixed to the light source support member 60 with the screw 86, the screw 86 is stopped from the one surface 881 side of the light source substrate 88, and the head of the screw 86. Is exposed in the recess 886 on one surface 881 of the light source substrate 88.

  Further, one screw 86 of the present embodiment is arranged every two groups G among the plurality of groups G. Specifically, for example, screws 86 are arranged in Mae between the end of the light source substrate 88 and the group Ga, and in Mbc between the group Gb and the group Gc. That is, the screw 86 is not disposed in the Mab between the group Ga and the group Gb.

  As described above, as in the first embodiment, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous (non-uniform) due to the screw 86 is generated, the discontinuous portion is illuminated in local dimming. It is located between areas (group units) in which the intensity of the emitted light of the illumination light from the device 8 is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

  In addition, since a part of the light emitted from the adjacent light emitting element 89 is reflected by the surface (metal surface) of the screws 86 arranged at regular intervals, there is virtually no gap between them. In addition, a light source having a very small luminance (a light source having a low light emission intensity) is disposed, and discontinuity is compensated.

[Embodiment 5]
FIG. 9 is a cross-sectional view of a main part of the display device 100 according to Embodiment 4 of the present invention. Since the basic configuration of the present embodiment is the same as that of the first and second embodiments, 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. 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 lower plate portion 61 faces the light incident portion 80 a of the light guide plate 80.

  In the illuminating device 8 having such a configuration, when the light source substrate 88 is fixed to the light source support member 60 with the screws 86 as in the first embodiment, the screws 86 are arranged on one side of the light source substrate 88 between the adjacent groups G. It is stopped from 881. For this reason, as in the first embodiment, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous with the surroundings occurs due to the screw 86, such a discontinuous portion is illuminated by the illumination device 8 in local dimming. It is located between the regions where the intensity of the emitted light is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

[Other embodiments]
The screw 86 is exemplified as a positioning structure for positioning the light source substrate 88 on the light source support member 60. However, a structure in which the light source substrate 88 is held by a hook (positioning structure) or a hole provided in the light source substrate 88 is used. The present invention may be applied to a structure in which the convex portion (positioning structure) of the light source support member 60 is fitted to hold the light source substrate 88.

  In the above embodiment, the configuration in which the plurality of light emitting elements 89 are arranged in the scanning line extending direction (X-axis direction) is illustrated, but the plurality of light emitting elements 89 in the data line extending direction (Y-axis direction) is exemplified. The present invention may also be applied to the display device 100 in which are arranged. In such a configuration, local dimming can be adopted, and a scan backlight method in which illumination light is emitted from the illumination device 8 in response to an operation in which the pixel column selected by the scanning signal is shifted is adopted. can do.

[Other embodiments]
In the fourth embodiment, the screws 86 are arranged every two groups G. However, the present invention is not limited to this. For example, the screws 86 may be arranged every three groups G.

  As described above, as in the first embodiment, even if a portion where the intensity of the emitted light of the illumination light becomes discontinuous (non-uniform) due to the screw 86 is generated, the discontinuous portion is illuminated in local dimming. It is located between areas (group units) in which the intensity of the emitted light of the illumination light from the device 8 is controlled. Therefore, even if a portion where the intensity of the emitted light of the illumination light is discontinuous due to the screw 86 is generated, the deterioration in display quality due to the discontinuity is not noticeable.

  In addition, since a part of the light emitted from the adjacent light emitting element 89 is reflected by the surface (metal surface) of the screws 86 arranged at regular intervals, there is virtually no gap between them. In addition, a light source having a very small luminance (a light source having a low light emission intensity) is disposed, and discontinuity is compensated.

[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. However, in addition to the liquid crystal television, an electronic device such as a personal computer display, a digital signage, a car navigation device, and a portable information terminal You may use the display apparatus 100 which applied this invention to the display part.

  8 .. Illumination device 10 .. Display panel 60.. Light source support member 80.. Light guide plate 80 a .. Light incident part 80 b .. Light exit surface 86 .. Screw (positioning structure) 88 .. Light source substrate, 89 .. Light emitting element (light source), 100... Display device, 280.

Claims (11)

A liquid crystal device comprising: an illuminating device; and a display panel disposed on the light emitting surface side of the illuminating device,
The lighting device includes:
A light guide plate disposed over the display panel;
Among the side end surfaces of the light guide plate, a plurality of light emitting elements arranged from one end side to the other end side of the light incident portion with the light emitting surface facing the side end surface that is the light incident portion,
A light source driving unit that drives the plurality of light emitting elements for each group;
A light source substrate on which the plurality of light emitting elements are mounted on one side;
A light source support member disposed on the other side of the light source substrate;
A positioning structure provided between adjacent groups among the plurality of groups and positioning the light source substrate on the light source support member in a state in which at least a part is exposed on one surface side of the light source substrate; ,
A display device comprising:   The plurality of light emitting elements are divided into a plurality of groups from the one end side toward the other end side, and the light source drive unit emits light for each group in conjunction with driving the display panel. The display device according to claim 1, wherein the display device is controlled.   The display device according to claim 1, wherein the positioning structure is a screw that is stopped from the one surface side of the light source substrate.   4. The display device according to claim 1, wherein the light emitting elements are arranged at equal intervals from the one end side to the other end side in the group. 5. .   The display device according to claim 4, wherein the plurality of light emitting elements are provided at equal intervals from the one end side toward the other end side.   5. The display according to claim 4, wherein an interval between the light emitting elements in the group is different from an interval between the adjacent light emitting elements belonging to an adjacent group among the plurality of groups. apparatus.   The display device according to claim 1, wherein the light source substrate extends integrally from the one end side toward the other end side.   The display device according to any one of claims 1 to 6, wherein the light source substrate is divided between adjacent groups among the plurality of groups.   An electronic apparatus comprising the display device according to any one of claims 1 to 8. A light guide plate;
Among the side end surfaces of the light guide plate, a plurality of light emitting elements arranged from one end side to the other end side of the light incident portion with the light emitting surface facing the side end surface that is the light incident portion,
A light source driving unit that drives the plurality of light emitting elements for each group;
A light source substrate on which the plurality of light emitting elements are mounted on one side;
A light source support member disposed on the other side of the light source substrate;
A positioning structure provided between adjacent groups among the plurality of groups and positioning the light source substrate on the light source support member in a state in which at least a part is exposed on one surface side of the light source substrate; ,
A lighting device comprising:   The plurality of light emitting elements are divided into a plurality of groups from the one end side toward the other end side, and the light source drive unit emits light for each group in conjunction with driving the display panel. It controls, The illuminating device of Claim 10 characterized by the above-mentioned.

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