WO2012002034A1 - Backlight device and display device - Google Patents

Backlight device and display device Download PDF

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Publication number
WO2012002034A1
WO2012002034A1 PCT/JP2011/060387 JP2011060387W WO2012002034A1 WO 2012002034 A1 WO2012002034 A1 WO 2012002034A1 JP 2011060387 W JP2011060387 W JP 2011060387W WO 2012002034 A1 WO2012002034 A1 WO 2012002034A1
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WO
WIPO (PCT)
Prior art keywords
light guide
light
guide bar
display panel
backlight device
Prior art date
Application number
PCT/JP2011/060387
Other languages
French (fr)
Japanese (ja)
Inventor
増田　岳志
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012002034A1 publication Critical patent/WO2012002034A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide

Definitions

  • the present invention relates to a backlight device and a display device, and more particularly to a backlight device and a display device including a light source and a light guide rod for guiding light from the light source.
  • backlight devices that illuminate a display panel.
  • the light source is two-dimensionally (planar) arranged at a position directly below the display panel. Further, in a direct type backlight device, it is difficult to reduce the number of light sources in order to ensure uniformity of illumination light while suppressing an increase in the thickness of the backlight device. For this reason, it is difficult to reduce the weight of the backlight device, and it is difficult to reduce the cost.
  • the edge light type backlight device a light guide plate is arranged at a position directly below the display panel, and a light source is arranged around the light guide plate. For this reason, in the edge light type backlight device, the number of light sources can be reduced as compared with the direct type backlight device.
  • the light guide plate is usually formed by a single member having an area approximately the same as that of the display panel.
  • a plurality of light guide bars are connected to each other.
  • a structure in which a light guide is configured so as to be in contact with each other is also known.
  • the light guide plate and the light guide body composed of a plurality of light guide bars have the same area as the display panel, and thus it is difficult to reduce the weight of the backlight device. There is a problem. It is also difficult to reduce costs.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a backlight device and a display device that can be reduced in weight while ensuring the uniformity of illumination light. Is to provide.
  • a backlight device is a backlight device disposed on the back side of a display panel, and a plurality of light sources and light from the light sources are incident thereon.
  • a plurality of light guide bars that have a light incident surface and guide light from the light source, and the plurality of light guide bars are arranged at a predetermined interval from each other.
  • a light emitting processing unit is provided that extends along the direction in which the light rod extends and changes the traveling direction of light from the light source to a direction suitable for external emission.
  • the side of the light guide bar is provided on one side of the side opposite to the display panel and the part on the side of the display panel. It is not provided in at least a part of the other.
  • the backlight device by providing a plurality of light guide bars for guiding light from the light source, unlike the direct-type backlight device, the light source is directly below the display panel. Since it is not necessary to arrange in the position, the thickness of the backlight device and the display device can be reduced.
  • the plurality of light guide bars are arranged at a predetermined interval from each other, thereby reducing the area of the plurality of light guide bars, for example, the area of the display panel. Therefore, the backlight device can be reduced in weight. In addition, the cost of the backlight device can be reduced.
  • the uniformity of the illumination light may be reduced if the thickness of the backlight device is reduced.
  • the light emission processing portion is provided on one of the side portion of the light guide bar opposite to the display panel and the portion on the display panel side.
  • the light guide bar is not provided on at least a part of the other part of the part opposite to the display panel and the part on the display panel side. For this reason, it is possible to control (set) whether light is emitted from the portion of the side of the light guide bar opposite to the display panel or the part on the display panel side.
  • the optical path length until the emitted light reaches the display panel (or the optical member) can be controlled. Thereby, since the light radiate
  • the light emitting processing portion is provided on a portion of the side surface of the light guide bar opposite to the display panel, and on the side surface of the light guide bar. Of these, it is not provided in at least a part of the portion on the display panel side.
  • the light path length until the light emitted from the light guide bar reaches the display panel (or optical member) can be increased, so that the light emitted from the light guide bar can be easily displayed.
  • a wide range of panels (or optical members) can be reached. Thereby, it can suppress easily that the uniformity of illumination light falls.
  • an optical member disposed on the display panel side of the light guide bar and a reflection member disposed on the side opposite to the display panel of the light guide bar are further provided, from the light guide bar to the optical member.
  • the distance is larger than the distance from the light guide rod to the reflecting member.
  • the light emission processing portion is provided in a portion on the display panel side of the side surface of the light guide bar, and is displayed on the side surface of the light guide bar. It is not provided in at least a part of the part opposite to the panel, and the light from the light source is emitted from the light guide bar mainly toward the side opposite to the display panel. If comprised in this way, since the light radiate
  • an optical member disposed on the display panel side of the light guide bar and a reflection member disposed on the side opposite to the display panel of the light guide bar are further provided, from the light guide bar to the optical member.
  • the distance is smaller than the distance from the light guide rod to the reflecting member.
  • the light emitting processing portion is provided on the other side of the side of the light guide bar opposite to the display panel and the portion on the display panel side. Absent. If comprised in this way, it can be controlled effectively from which part of the side of a light guide rod the part on the opposite side to a display panel, and the part by the side of a display panel radiate
  • the light guide bar is formed in a tapered shape. If comprised in this way, since it can suppress that a light radiate
  • the light emitting processing portion is formed in a strip shape having a width substantially the same as the length of one side of the tip surface of the light guide bar. ing. If comprised in this way, the width
  • the side surface of the light guide rod may be formed in a dogleg shape when viewed from the side opposite to the light incident surface of the light guide rod.
  • the side surface of the light guide rod is formed in a U shape when viewed from the side opposite to the light incident surface of the light guide rod
  • the side surface includes a first side surface portion and a first side surface portion.
  • the second side surface portion disposed on the side opposite to the display panel of the one side surface portion, and the light emitting processing portion is provided only on one of the second side surface portion and the first side surface portion.
  • the light emission processing part is not easily provided on at least a part of the side part of the light guide bar opposite to the display panel and the other part of the display panel side, Of the side surfaces of the light guide bar, the light guide bar can be provided on one of the part on the opposite side of the display panel and the part on the display panel side.
  • the backlight device further includes a holding member that holds the light incident surface side portion of the light guide rod, and the light guide rod is provided with a convex portion. Is provided with an engaging recess that engages with the convex portion of the light guide rod. If comprised in this way, since a light guide bar can be positioned in the predetermined position of a holding member, the assembly workability
  • the backlight device preferably further includes a holding member that holds a portion of the light guide bar on the light incident surface side, and the holding member restricts the light guide bar from moving to the light source side.
  • the control part which suppresses that a light-guide rod contacts a light source is provided. If comprised in this way, it can suppress that a light guide bar moves to the light source side, and can suppress that a light guide bar contacts a light source.
  • the backlight device preferably further includes an optical member disposed on the display panel side of the light guide bar, and a holding member that holds a portion of the light incident surface side of the light guide bar.
  • the member is disposed on the surface of the holding member on the display panel side. If comprised in this way, it can suppress that a number of parts increases compared with the case where the member which mounts an optical member is provided separately.
  • the backlight device preferably further includes a clip for holding the light guide bar. If comprised in this way, it can suppress that a light guide bar moves or curves.
  • the plurality of light guide bars are connected by a connecting portion. If comprised in this way, a number of parts can be reduced compared with the case where the some light guide bar is formed separately. In addition, since the plurality of light guide bars and the plurality of light sources can be aligned at the same time by connecting the plurality of light guide bars with the connecting portion, the assembly workability of the backlight device can be improved. .
  • the backlight device in which the plurality of light guide bars are connected by the connecting portion, preferably, the backlight device further includes a clip for holding the connecting portion.
  • the clip does not hinder light from being emitted from the light guide bar, so compared to the case where the light guide bar is held by the clip.
  • the uniformity of the illumination light can be improved.
  • a part of light which passes the inside of a light guide rod goes back and forth between adjacent light guide rods via a connection part.
  • the amount of light passing through the connecting portion is less than the light passing through the light guide rod. For this reason, as described above, the amount of light absorbed by the clip can be reduced by holding the connecting portion by the clip as compared to the case where the light guide bar is held by the clip. Thereby, the loss of light can be reduced.
  • the connecting portion is provided with a protruding portion extending in a direction intersecting with the extending direction of the connecting portion, It is held by a clip.
  • intersects the extending direction of a connection part is provided in the connection part, a part of light which passes the inside of a connection part approachs into a protrusion part. Since the light entering the projecting portion is less than the light passing through the connecting portion, holding the projecting portion with the clip reduces the amount of light absorbed by the clip as compared to holding the connecting portion with the clip. The amount can be reduced. Thereby, the loss of light can be further reduced.
  • the protruding portion is preferably formed so as to extend in parallel with the extending direction of the light guide rod. If comprised in this way, a protrusion part can be moved (sliding) with respect to a clip in parallel with the direction where a light-guide rod is extended. Thereby, when the light guide bar expands and contracts due to heat, the light guide bar can be prevented from being deformed (for example, the light guide bar is bent).
  • a display device includes the backlight device configured as described above and a display panel illuminated by the backlight device. If comprised in this way, the display apparatus which can be reduced in weight can be obtained, ensuring the uniformity of illumination light.
  • FIG. 1 is a cross-sectional view illustrating a schematic structure of a liquid crystal display device according to a first embodiment of the present invention.
  • FIG. 2 is a plan view for explaining the structure of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is an exploded perspective view showing structures of a light guide bar and a holding member of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is a perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1.
  • FIG. 1 is a cross-sectional view illustrating a schematic structure of a liquid crystal display device according to a first embodiment of the present invention.
  • FIG. 2 is a plan view for explaining the structure of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is an exploded
  • FIG. 2 is a side view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1.
  • FIG. 3 is an enlarged front view for explaining the structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is an enlarged perspective view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is an enlarged view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 1 is a side view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1.
  • FIG. 3 is an enlarged front view for explaining the structure of a light guide bar of the backlight device of
  • FIG. 2 is a plan view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is a cross-sectional view illustrating a structure of a backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1.
  • FIG. 4 is an enlarged cross-sectional view showing a structure of a back side holding member of the holding member shown in FIG. 3. It is the enlarged front view which showed the structure of the back side holding member of the holding member shown in FIG.
  • FIG. 4 is an enlarged cross-sectional view illustrating a structure of a cover member of the holding member illustrated in FIG. 3.
  • FIG. 2 is a plan view showing structures of light guide bars and clips of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1.
  • FIG. 2 is an enlarged cross-sectional view illustrating structures of light guide bars and clips of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1. It is the disassembled perspective view which showed the structure of the light guide rod and holding member of the backlight apparatus of the liquid crystal display device by 2nd Embodiment of this invention.
  • FIG. 17 is a perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16.
  • FIG. 17 is a side view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16.
  • FIG. 17 is an enlarged front view for explaining a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention shown in FIG. 16.
  • FIG. 17 is an enlarged perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16. It is the perspective view which showed the structure of the light guide rod of the backlight apparatus of the liquid crystal display device by 3rd Embodiment of this invention. It is the side view which showed the structure of the light guide bar shown in FIG.
  • FIG. 25 is an enlarged perspective view showing the structure of the light guide rod shown in FIG. 24. It is the perspective view which showed the structure of the light guide rod of the backlight apparatus of the liquid crystal display device by 5th Embodiment of this invention. It is the side view which showed the structure of the light guide bar shown in FIG.
  • FIG. It is an enlarged front view for demonstrating the structure of the light guide bar shown in FIG. It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 6th Embodiment of this invention. It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 7th Embodiment of this invention. It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 8th Embodiment of this invention. It is a top view for demonstrating the structure of the backlight apparatus of the liquid crystal display device by the 1st modification of this invention.
  • the liquid crystal display device 1 includes a liquid crystal display panel 2 and a backlight device 10 that illuminates the liquid crystal display panel 2 as shown in FIG.
  • the liquid crystal display device 1 is an example of the “display device” in the present invention
  • the liquid crystal display panel 2 is an example of the “display panel” in the present invention.
  • the liquid crystal display panel 2 includes an AM substrate (active matrix substrate) 2a and a counter substrate 2b disposed to face the AM substrate 2a.
  • a liquid crystal (not shown) is sealed between the AM substrate 2a and the counter substrate 2b.
  • Polarizing films 2c and 2d are provided on the light receiving surface (back surface) side of the AM substrate 2a and the light emitting surface (front surface) side of the counter substrate 2b, respectively.
  • the liquid crystal display panel 2 functions as a display panel when illuminated by the backlight device 10.
  • the backlight device 10 is an edge light (side light) type backlight device, and includes a plurality of bar-shaped light guide bars 20 and a plurality of light sources arranged to face a light incident surface 21a (described later) of the light guide bar 20. 30, the reflection sheet 11 disposed on the rear side (lower side) of the light guide bar 20, the diffusion plate 12 and the optical sheet 13 disposed on the front side (upper side) of the light guide bar 20, and the light guide bar 20
  • the holding member 40 (refer FIG. 3) holding the holding
  • the reflection sheet 11 is an example of the “reflection member” in the present invention, and the diffusion plate 12 and the optical sheet 13 are examples of the “optical member” in the present invention. In FIG. 1, the holding member 40 is omitted.
  • the light guide rod 20 is formed of a light-transmitting resin or the like, and has a function of guiding light while totally reflecting light from the light source 30 and emitting the light from a light emitting unit 22 described later.
  • the detailed structures of the light guide bar 20 and the holding member 40 will be described later.
  • the light source 30 is configured to emit light toward the light guide bar 20.
  • the light source 30 is configured by, for example, a white LED (Light Emitting Diode) that emits white light.
  • the light source 30 may be composed of, for example, a red light emitting element, a green light emitting element, and a blue light emitting element, or may be composed of a blue light emitting element and a phosphor that converts part of the blue light into yellow light. May be.
  • the plurality of light sources 30 are attached to the mounting substrate 31 as shown in FIG.
  • two mounting substrates 31 are arranged on one side in the short side direction (A direction) of the liquid crystal display panel 2 (see FIG. 1).
  • the backlight device 10 is configured so that the intensity of light emitted from the light source 30 can be adjusted for each light source 30. For this reason, since it is possible to control the intensity of illumination light for each of the plurality of light guide bars 20 according to the display image, it is possible to increase the contrast of the display image and It is possible to reduce power consumption.
  • the reflection sheet 11 has a function of reflecting, to the liquid crystal display panel 2 side, light that travels toward the side opposite to the liquid crystal display panel 2 out of the light emitted from the light guide bar 20. .
  • the diffusion plate 12 has a function of diffusing light from the light guide rod 20 (or the reflection sheet 11) and emitting it to the liquid crystal display panel 2 side (optical sheet 13 side).
  • the optical sheet 13 is composed of, for example, a plurality of sheets such as a prism sheet and a lens sheet, and has a function of condensing light from the diffusion plate 12 at a predetermined viewing angle.
  • the diffusion plate 12 and the optical sheet (such as a prism sheet or a lens sheet) 13 are provided as necessary and may be omitted.
  • the backlight chassis 50 is formed, for example, by bending a metal plate.
  • the plurality of light guide bars 20 are arranged so as to extend in the short side direction (A direction) of the liquid crystal display panel 2 (see FIG. 1).
  • the liquid crystal display panel 2 is disposed at a predetermined interval in the longitudinal direction (B direction (direction orthogonal to the A direction)).
  • a plurality of light guide bars 20 are arranged along the longitudinal direction (B direction) of the liquid crystal display panel 2, and one light guide bar 20 is arranged along the short direction (A direction) of the liquid crystal display panel 2. ing.
  • the light guide bar 20 includes a holding portion 21 held by a holding member 40 (see FIG. 3) and a light emitting portion 22 that emits light from the light source 30 (see FIG. 2). It is out.
  • the holding part 21 is formed in a rectangular parallelepiped shape, for example. Specifically, as shown in FIGS. 4 and 5, the holding unit 21 includes a light incident surface 21a on which light emitted from the light source 30 (see FIG. 2) is incident, a front surface (upper surface) 21b, and a rear surface ( Lower surface) 21c and a pair of side surfaces 21d.
  • the light incident surface 21a is formed perpendicular to the A direction.
  • the front surface 21b and the back surface 21c are formed in parallel to each other, and are formed perpendicular to the thickness direction (C direction) of the backlight device 10.
  • the pair of side surfaces 21 d are formed in parallel to each other and are formed perpendicular to the B direction.
  • a convex portion 21e protruding downward is formed on the back surface 21c.
  • the convex portion 21e may have a hemispherical shape or other shapes.
  • the light emitting portion 22 (light guide rod 20) is formed in a tapered shape (tapered shape).
  • the light emitting unit 22 includes a front end surface 22a formed on the side opposite to the light incident surface 21a of the holding unit 21 (the side opposite to the light source 30), and a front surface (upper surface) 22b (see FIG. 5). And a back surface (lower surface) 22c (see FIG. 5) and a pair of side surfaces 22d (see FIGS. 5 and 6).
  • the front end surface 22a is formed perpendicular to the A direction. Further, the tip surface 22 a is formed to have an area smaller than the light incident surface 21 a of the holding unit 21. Further, as shown in FIG. 6, the length in the C direction of the tip surface 22a is smaller than half of the length in the C direction of the light incident surface 21a (see FIG. 5) of the holding portion 21.
  • the back surface 22 c is formed perpendicular to the C direction and is formed on the same plane as the back surface 21 c of the holding portion 21.
  • the front surface 22b is formed so as to be inclined with respect to the front surface 21b of the holding portion 21, and the distance between the front surface 22b and the back surface 22c as the distance from the light incident surface 21a increases. Is formed to be small.
  • the pair of side surfaces 22d are formed so as to be inclined with respect to the side surface 21d of the holding portion 21, and formed such that the distance from each other decreases as the distance from the light incident surface 21a increases. Has been.
  • the traveling direction of light from the light source 30 is changed to a direction suitable for external emission.
  • the processed portion 22e is formed. That is, the processing unit 22e has a function of refracting or reflecting light guided while being totally reflected so that the light can be emitted to the outside without being totally reflected. For this reason, for example, as shown in FIG. 8, the light that has reached the processed portion 22e on one side surface 22d is mainly emitted from the surface (the other side surface 22d) disposed opposite to the one side surface 22d.
  • the hatched areas in FIGS. 4 to 7 show the processed portion 22e.
  • the processed portion 22e is an example of the “light emitting processed portion” in the present invention.
  • the processed portion 22 e is formed so as to extend along the direction in which the light guide bar 20 extends.
  • the processed portion 22e is formed in a belt shape having a width that is substantially the same as the length in the thickness direction (C direction) of the distal end surface 22a. That is, the processed portion 22e is formed in a belt shape having a width that is substantially the same as the length of one side of the tip end surface 22a.
  • the processing unit 22e may be formed of, for example, a plurality of triangular prisms, or a lens (not shown) or white ink (white paint) is used instead of a prism. You may form by the dot part (not shown) by dot type printing processing.
  • the traveling direction of the light from the light source 30 is changed by being refracted or reflected by the processing unit 22e, and is not emitted to the outside because the total reflection condition is not satisfied.
  • the processed portion 22e is formed by a dot portion by dot printing, the traveling direction of the light from the light source 30 is changed by being reflected or diffused by the processed portion 22e, and the total reflection condition is not satisfied and is externally provided. Emitted.
  • the light emitted from the light guide rod 20 (processed portion 22e) is emitted in a state having a predetermined emission angle distribution in the C direction as shown in FIG.
  • region enclosed with the dashed-dotted line of FIG. 6 has shown the output angle distribution of the C direction of the light radiate
  • the illumination light reaches the diffusion plate 12 in a wider range.
  • the backlight device 10 is formed so that the optical path length until the light emitted from the light guide rod 20 reaches the diffusion plate 12 is increased.
  • the processed portion 22 e is provided on the lower portion of the side surface 22 d of the light emitting portion 22 (of the side surface 22 d on the side opposite to the liquid crystal display panel 2. Is not formed on the portion above the side surface 22d (the portion on the liquid crystal display panel 2 side of the side surface 22d). That is, the processed portion 22e is formed in a portion below the center of the light guide bar 20 in the C direction, but is not formed in a portion above the center of the light guide bar 20 in the C direction.
  • the light guide rod 20 is arranged such that the distance from the light guide rod 20 (front surface 21b) to the diffusion plate 12 is larger than the distance from the light guide rod 20 (back surface 21c) to the reflection sheet 11. 20 is arranged.
  • the light emitting portion 22 (light guide rod 20) is formed in a tapered shape (tapered shape), as shown in FIG. Is likely to reach the processed portion 22e (see FIG. 8) of the light emitting portion 22, and the probability of reaching the tip surface 22a is reduced.
  • the holding portion 21 of the light guide bar 20 is held by a holding member 40.
  • the holding member 40 includes a back-side holding member 41 disposed on the back surface 21 c side of the holding portion 21 of the light guide bar 20, and a cover member 42 that covers the front surface 21 b side of the holding portion 21.
  • the back side holding member 41 and the cover member 42 are made of, for example, white polycarbonate resin and have a function of reflecting light.
  • the back side holding member 41 is formed in a substantially rectangular parallelepiped shape extending in the B direction.
  • the back side holding member 41 is formed with concave portions 41a for holding the holding portion 21 of the light guide bar 20 at a predetermined pitch in the B direction.
  • the concave portion 41a is formed with, for example, a hemispherical engaging concave portion 41b that engages with the convex portion 21e (see FIG. 10) of the light guide rod 20.
  • the engaging recess 41b is used for positioning the light guide bar 20 when the backlight device 10 is assembled.
  • the engaging recess 41b has a function of suppressing the light guide bar 20 from moving in the A direction.
  • an opening 41 c is formed in the back side holding member 41 so as to face the light incident surface 21 a (see FIG. 10) of the light guide bar 20.
  • the light source 30 is fitted into the opening 41c from the outside.
  • a restricting portion 41d for restricting the light guide rod 20 from moving to the light source 30 side is formed.
  • the cover member 42 is formed so as to sandwich and hold the light guide rod 20 with the back side holding member 41.
  • the diffusion plate 12 and the optical sheet 13 are disposed on the front surface (upper surface) 42 a of the cover member 42.
  • the front surface 42a is an example of the “surface on the display panel side of the holding member” in the present invention.
  • the inner surface 42 b of the cover member 42 is formed on an inclined surface, and the light emitted from the light guide rod 20 and reaching the cover member 42 is diffused on the diffusion plate 12 side (liquid crystal It has a function of reflecting on the display panel 2 side.
  • the light emitting portion 22 of the light guide rod 20 is sandwiched (held) by a clip 60.
  • the clip 60 includes a pair of sandwiching portions 60 a that sandwich (hold) the light emitting portion 22 of the light guide rod 20, and an insertion portion 60 b that is attached to the attachment hole 50 a of the backlight chassis 50. Contains.
  • the light guide bar 20 is held at a predetermined position of the backlight device 10 by the clip 60 and the holding member 40 (see FIG. 10).
  • the light source 30 is directly below the liquid crystal display panel 2. Since it is not necessary to arrange
  • the plurality of light guide bars 20 are arranged at a predetermined interval from each other, thereby reducing the area of the plurality of light guide bars 20 from the area of the liquid crystal display panel 2. Therefore, the backlight device 10 can be reduced in weight. In addition, the cost of the backlight device 10 can be reduced.
  • the processed portion 22e is provided in the lower portion of the side surface 22d of the light guide bar 20, and is not provided in the upper portion of the side surface 22d of the light guide bar 20. For this reason, light can be emitted from the lower part of the side surface 22d of the light guide bar 20, and the optical path length until the light emitted from the light guide bar 20 reaches the diffusion plate 12 can be increased. . Thereby, since the light radiate
  • the distance from the light guide bar 20 to the diffusion plate 12 is set to be larger than the distance from the light guide bar 20 to the reflection sheet 11, thereby emitting from the light guide bar 20. Since the optical path length until the transmitted light reaches the diffusion plate 12 can be further increased, the light emitted from the light guide rod 20 can reach a wider range of the diffusion plate 12. Thereby, it can suppress more that the uniformity of illumination light falls.
  • the probability that the light from the light source 30 reaches the tip surface 22a is reduced.
  • the utilization efficiency of light can be improved.
  • luminance of the part of the liquid crystal display panel 2 in the vicinity of the front end surface 22a of the light guide rod 20 becomes high.
  • the luminance uniformity of the liquid crystal display panel 2 can be further improved by suppressing light from being emitted from the distal end surface 22a of the light guide bar 20.
  • the processed portion 22e is formed in a strip shape having a width substantially the same as the length of one side of the distal end surface 22a of the light guide rod 20, thereby forming the processed portion 22e.
  • the width can be made constant.
  • the light guide rod 20 is provided with the convex portion 21e
  • the holding member 40 is provided with the engagement concave portion 41b that engages with the convex portion 21e of the light guide rod 20. Since the light guide bar 20 can be positioned at a predetermined position of the holding member 40, the assembly workability of the backlight device 10 can be improved. Further, by providing the light guide rod 20 with the convex portion 21e, it is possible to suppress the passage of light passing through the light guide rod 20 from being hindered compared to the case where the light guide rod 20 is provided with the engagement concave portion. it can.
  • the light guide bar 20 contacts the light source 30 by providing the holding member 40 with the restricting portion 41 d that restricts the light guide bar 20 from moving toward the light source 30. Can be suppressed.
  • the light guide rod 20 can be prevented from moving in the A direction by the engaging recess 41b of the holding member 40. Thereby, since it can suppress that the light guide bar 20 moves to the light source 30 side, it can suppress that the light guide bar 20 contacts the light source 30 more.
  • the light guide rod 20 can be prevented from moving to the side opposite to the light source 30 by the engaging recess 41b. Thereby, since it can suppress that the distance between the light source 30 and the light guide rod 20 becomes large, it suppresses that the efficiency which the light radiate
  • the diffusion plate 12 and the optical sheet 13 are disposed on the front surface 42a of the holding member 40, so that a member for placing the diffusion plate 12 and the optical sheet 13 is separately provided. Compared to the case, it is possible to suppress an increase in the number of parts.
  • the light guide bar 120 includes a holding unit 121 held by the holding member 140 and a light emitting unit that emits light from the light source 30. 122.
  • the light guide bar 120 is formed so that light from the light source 30 is emitted mainly from the light guide bar 120 in an obliquely forward direction (obliquely upward direction).
  • the light guide bar 120 is formed so that the light guide bar 20 of the first embodiment is rotated by 45 degrees.
  • the holding part 121 has a dogleg shape when viewed from the side opposite to the light incident surface 121a (see FIGS. 17 and 18) on which the light emitted from the light source 30 is incident and the light incident surface 121a. And a pair of side surfaces 121b (see FIG. 19).
  • the side surface 121b includes a front side surface portion 121c and a rear side surface portion 121d arranged on the rear side (lower side) of the front side surface portion 121c.
  • the front side surface portion 121c and the rear side surface portion 121d are formed to be inclined by 45 degrees with respect to the C direction.
  • the front side surface portion 121c is an example of the “first side surface portion” in the present invention
  • the rear side surface portion 121d is an example of the “second side surface portion” in the present invention.
  • a convex portion 121e protruding downward is formed on the rear (lower) portion of the holding portion 121.
  • the convex portion 121e may have a substantially rectangular parallelepiped shape or other shape.
  • the light emission part 122 (light guide bar 120) is formed in the taper shape (taper shape).
  • the light emitting part 122 is formed in a dogleg shape when viewed from the tip surface 122a formed on the side opposite to the light incident surface 121a of the holding part 121 and the tip surface 122a side (the side opposite to the light incident surface 121a). And a pair of side surfaces 122b.
  • the side surface 122b includes a front side surface portion 122c and a rear side surface portion 122d arranged on the rear side (lower side) of the front side surface portion 122c.
  • the front side surface portion 122c is an example of the “first side surface portion” in the present invention
  • the rear side surface portion 122d is an example of the “second side surface portion” in the present invention.
  • the front side surface portion 122 c is formed so as to be inclined with respect to the front side surface portion 121 c of the holding portion 121, and as the distance from the light incident surface 121 a (see FIG. 18) increases. It is formed so as to approach the reflection sheet 11.
  • the rear side surface portion 122d is formed on the same plane as the rear side surface portion 121d of the holding portion 121.
  • the rear side surface portion 122d has a processing portion 122e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission. Is formed. For this reason, as shown in FIG. 19, the light that has reached the rear side surface portion 122d is emitted in a diagonally forward direction mainly from the surface (front side surface portion 122c) disposed to face the rear side surface portion 122d.
  • the hatched areas in FIGS. 18 to 20 show the processed part 122e. Further, the region surrounded by the one-dot chain line in FIG. 19 shows the emission angle distribution of the light emitted from the light guide rod 120.
  • the processing part 122e is an example of the “light emitting processing part” in the present invention.
  • the processed portion 122 e has a lower part of the light guide bar 120 (below the center of the light guide bar 120 in the C direction). On the other hand, it is not formed on the upper part of the light guide bar 120 (the part above the center of the light guide bar 120 in the C direction). Further, the processed portion 122e is formed in a belt shape having a width that is substantially the same as the length of one side of the distal end surface 122a.
  • the light guide bar 120 is disposed so that the distance from the light guide bar 120 to the diffusion plate 12 is larger than the distance from the light guide bar 120 to the reflection sheet 11. .
  • the holding member 140 includes a lower holding member 141 disposed on the lower side of the holding portion 121 of the light guide bar 120 and a cover member 142 that covers the upper side of the holding portion 121.
  • concave portions 141a for holding the holding portion 121 of the light guide rod 120 are formed at a predetermined pitch in the B direction.
  • An engagement recess 141b that engages with the protrusion 121e of the light guide rod 120 is formed in the recess 141a.
  • the lower holding member 141 has an opening 141c so as to face the light incident surface 121a (see FIG. 18) of the light guide rod 120.
  • a restricting portion 141d that restricts the light guide rod 120 from moving to the light source 30 side is formed around the opening 141c.
  • the light guide bar 220 is formed in a substantially quadrangular prism shape.
  • the holding portion 221 of the light guide bar 220 includes a light incident surface 221 a on which light emitted from the light source 30 is incident, and light, as in the second embodiment. When viewed from the side opposite to the incident surface 221a, it includes a pair of U-shaped side surfaces 221b.
  • the side surface 221b includes a front side surface portion 221c and a rear side surface portion 221d disposed on the rear side (lower side) of the front side surface portion 221c, as in the second embodiment. Further, as shown in FIG. 22, a convex portion 221e that protrudes downward is formed on the rear (lower) portion of the holding portion 221.
  • the front side surface portion 221c is an example of the “display panel side portion” and the “first side surface portion” in the present invention.
  • the rear side surface portion 221d is an example of the “part on the side opposite to the display panel” and the “second side surface portion” of the present invention.
  • the light emitting portion 222 of the light guide rod 220 is viewed from the tip surface 222a formed on the side opposite to the light emitting surface 221a of the holding portion 221 and the tip surface 222a side (the side opposite to the light incident surface 221a). And a pair of side surfaces 222b having a U-shape.
  • the side surface 222b includes a front side surface portion 222c and a rear side surface portion 222d arranged on the rear side (lower side) of the front side surface portion 222c.
  • the front side surface portion 222c is an example of the “display panel side portion” and the “first side surface portion” in the present invention.
  • the rear side surface portion 222d is an example of the “part opposite to the display panel” and the “second side surface portion” of the present invention.
  • the front side surface portion 222 c is formed on the same plane as the front side surface portion 221 c of the holding portion 221, and is a surface (rear side surface portion) disposed opposite to the front side surface portion. 222d).
  • a processing portion 222e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission is formed on the rear side surface portion 222d.
  • the light that has reached the rear side surface portion 222d is emitted in a diagonally forward direction mainly from the surface (front side surface portion 222c) disposed to face the rear side surface portion 222d.
  • the hatched areas in FIGS. 21 to 23 show the processed part 222e.
  • a region surrounded by a one-dot chain line in FIG. 23 indicates an emission angle distribution of light emitted from the light guide bar 220.
  • the processed portion 222e is an example of the “light emitting processed portion” in the present invention.
  • the processed portion 222 e is formed on the lower portion (rear side surface portion 222 d) of the light guide rod 220, while on the upper side of the light guide rod 220. It is not formed on the portion (front side surface portion 222c). That is, the processed portion 222e is formed in a portion below the center of the light guide bar 220 in the C direction, but is not formed in a portion above the center of the light guide bar 220 in the C direction.
  • the remaining structure of the third embodiment is the same as that of the second embodiment.
  • a processing portion 322e is formed on the upper side (liquid crystal display panel 2 side) of the light guide bar 320. The case will be described.
  • the light guide bar 320 includes a holding portion 321 and a light emitting portion 322 as shown in FIG.
  • the light guide bar 320 is formed as if the light guide bar 120 of the second embodiment is turned upside down.
  • the light guide bar 320 is formed so that the light from the light source 30 is emitted from the light guide bar 320 in an obliquely rearward direction (an obliquely downward direction).
  • the holding portion 321 has a dogleg shape when viewed from the side opposite to the light incident surface 321a (see FIGS. 24 and 25) on which light emitted from the light source 30 is incident and the light incident surface 321a. And a pair of side surfaces 321b (see FIG. 26).
  • the side surface 321b includes a front side surface portion 321c and a rear side surface portion 321d disposed on the rear side (lower side) of the front side surface portion 321c.
  • the front side surface portion 321c is an example of the “first side surface portion” in the present invention
  • the rear side surface portion 321d is an example of the “second side surface portion” in the present invention.
  • a convex portion 321e protruding downward is formed on the rear (lower) portion of the holding portion 321.
  • the light emission part 322 (light guide bar 320) is formed in the taper shape (taper shape).
  • the light emitting portion 322 includes a tip surface 322a formed on the side opposite to the light incident surface 321a of the holding portion 321 and a tip surface 322a side (the side opposite to the light incident surface 321a). ) And a pair of side surfaces 322b having a dogleg shape.
  • the side surface 322b includes a front side surface portion 322c and a rear side surface portion 322d disposed on the rear side (lower side) of the front side surface portion 322c.
  • the front side surface portion 322c is an example of the “first side surface portion” in the present invention
  • the rear side surface portion 322d is an example of the “second side surface portion” in the present invention.
  • the front side surface portion 322c is formed on the same plane as the front side surface portion 321c of the holding portion 321 as shown in FIGS.
  • the front side surface portion 322c has a processing portion 322e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission. Is formed.
  • the light that has reached the front side surface portion 322c is mainly obliquely rearward (from the liquid crystal display panel 2 to the rear side surface portion 322d) opposed to the front side surface portion 322c. Is emitted toward the opposite side.
  • the hatched areas in FIGS. 24 to 27 show the processed portion 322e.
  • a region surrounded by a one-dot chain line in FIG. 26 indicates an emission angle distribution of light emitted from the light guide bar 320.
  • the processed portion 322e is an example of the “light emitting processed portion” in the present invention.
  • the processing portion 322e is provided on the upper part of the light guide bar 320 (from the center of the light guide bar 320 in the C direction). Is not formed in the lower part of the light guide bar 320 (the part below the center of the light guide bar 320 in the C direction).
  • the processed portion 322e is formed in a belt shape having a width that is approximately the same as the length of one side of the tip end surface 322a.
  • the rear side surface portion 322d is formed to be inclined with respect to the rear side surface portion 321d of the holding portion 321, and as the distance from the light incident surface 321a increases, the reflection sheet is formed. 11 is formed so as to be away from 11.
  • the distance from the light guide bar 320 to the diffusion plate 12 is the distance from the light guide bar 320 to the reflection sheet 11.
  • the light guide bar 320 is arranged so as to be smaller than that.
  • the remaining structure of the fourth embodiment is similar to that of the aforementioned second embodiment.
  • the processing portion 322e is provided in the upper part of the light guide bar 320, and is not provided in the lower part of the light guide bar 320, and the light from the light source 30 is guided.
  • the light is emitted from the light rod 320 in a diagonally downward direction.
  • the light emitted from the light guide bar 320 reaches the diffusion plate 12 after being reflected by the reflection sheet 11, so that the optical path length until the light emitted from the light guide bar 320 reaches the diffusion plate 12 is increased. can do.
  • emitted from the light-guide rod 320 can be easily made to reach the wide range of the diffusion plate 12, it can suppress that the uniformity of illumination light falls easily.
  • the distance from the light guide bar 320 to the diffusion plate 12 is made smaller than the distance from the light guide bar 320 to the reflection sheet 11 to emit from the light guide bar 320. It is possible to further increase the optical path length until the received light reaches the diffusion plate 12. Thereby, since the light radiate
  • the light guide bar 420 is formed in a substantially quadrangular prism shape.
  • the light guide bar 420 is formed as if the light guide bar 220 of the third embodiment is turned upside down.
  • the light guide bar 420 is formed such that light from the light source 30 is emitted from the light guide bar 420 in an obliquely rearward direction (an obliquely downward direction).
  • the holding portion 421 of the light guide bar 420 includes a light incident surface 421a on which light emitted from the light source 30 is incident, and light, as in the fourth embodiment.
  • a pair of U-shaped side surfaces 421b is included.
  • the side surface 421b includes a front side surface portion 421c and a rear side surface portion 421d disposed on the rear side (lower side) of the front side surface portion 421c, as in the fourth embodiment. Further, as shown in FIG. 29, a convex portion 421e protruding downward is formed on the rear (lower) portion of the holding portion 421.
  • the front side surface portion 421c is an example of the “display panel side portion” and the “first side surface portion” in the present invention.
  • the rear side surface portion 421d is an example of the “part on the side opposite to the display panel” and the “second side surface portion” of the present invention.
  • the light emitting portion 422 of the light guide rod 420 is seen from the tip surface 422a formed on the side opposite to the light emitting surface 421a of the holding portion 421 and the tip surface 422a side (the side opposite to the light incident surface 421a). And a pair of side surfaces 422b having a U-shape.
  • the side surface 422b includes a front side surface portion 422c and a rear side surface portion 422d disposed on the rear side (lower side) of the front side surface portion 422c.
  • the front side surface portion 422c is an example of the “display panel side portion” and the “first side surface portion” in the present invention.
  • the rear side surface portion 422d is an example of the “part opposite to the display panel” and the “second side surface portion” of the present invention.
  • the front side surface portion 422 c is formed on the same plane as the front side surface portion 421 c of the holding portion 421, and is a surface (rear side surface portion) disposed opposite to it. 422d).
  • a processed portion 422e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission is formed on the front side surface portion 422c. Therefore, as shown in FIG. 30, the light that has reached the front side surface portion 422c is obliquely rearward (from the liquid crystal display panel 2 with respect to the surface (rear side surface portion 422d) opposed to the front side surface portion 422c. Is emitted toward the opposite side.
  • the hatched areas in FIGS. 28 to 30 show the processed part 422e.
  • a region surrounded by a one-dot chain line in FIG. 30 indicates an emission angle distribution of light emitted from the light guide bar 420.
  • the processed portion 422e is an example of the “light emitting processed portion” in the present invention.
  • the processed portion 422e is formed on the upper portion (front side surface portion 422c) of the light guide bar 420, while the lower portion of the light guide bar 420 is formed. It is not formed on the portion (rear side surface portion 422d).
  • the processed portion 422e is formed in a portion above the center of the light guide rod 420 in the C direction, but is not formed in a portion below the center of the light guide rod 420 in the C direction.
  • the remaining structure of the fifth embodiment is the same as that of the third and fourth embodiments.
  • the effect of the fifth embodiment is the same as that of the first to fourth embodiments.
  • adjacent light guide bars 520 are connected by a connecting portion 523.
  • the connecting portion 523 is formed so as to extend in a direction (B direction) orthogonal to (intersect) the direction in which the light guide bar 520 extends.
  • connecting portion 523 may be formed to have a smaller cross-sectional area than the light guide bar 520. Further, for example, one connecting portion 523 is provided between adjacent light guide bars 520.
  • the plurality of light guide bars 520 and the connecting portion 523 are formed of a translucent resin or the like, and are integrally formed by, for example, injection molding using a molding die.
  • the three light guide bars 520 are connected by the connecting part 523, but two or four or more light guide bars 520 may be connected by the connecting part 523. Further, all the light guide bars 520 included in the backlight device may be connected by the connecting portion 523.
  • one of the plurality of light guide bars 520 is sandwiched (held) by the clip 60.
  • the other structure of the sixth embodiment is the same as that of the first to fifth embodiments.
  • the plurality of light guide bars 520 are connected by the connecting portion 523, thereby reducing the number of parts compared to the case where the plurality of light guide bars 520 are formed separately. can do. Further, since the plurality of light guide bars 520 and the plurality of light sources 30 can be aligned simultaneously by connecting the plurality of light guide bars 520 with the connecting portion 523, the assembly workability of the backlight device is improved. Can be made.
  • the connecting portion 523 is clamped (held) by a clip 660, unlike the sixth embodiment. Further, for example, one of the plurality of connecting portions 523 is sandwiched (held) by the clip 660.
  • connecting portion 523 is provided on a portion of the light guide bar 520 opposite to the light source 30.
  • the other structure of the seventh embodiment is the same as that of the first to sixth embodiments.
  • the connecting portion 523 is held by the clip 660 as described above.
  • the light is not blocked by the clip 60 from being emitted from the light guide bar 520, and therefore the case where the light guide bar 520 is held by the clip 60.
  • the uniformity of illumination light can be improved.
  • a part of the light passing through the light guide rod 520 travels between the adjacent light guide rods 520 via the connecting portion 523.
  • the light guide bar 520 and the connection part 523 are held by the clips 60 and 660, a part of the light passing through the light guide bar 520 and the connection part 523 is part of the light guide bar 520 and the clip 60 of the connection part 523.
  • the light is emitted to the outside from the portion in contact with 660 and absorbed by clips 60 and 660.
  • the amount of light passing through the connecting portion 523 is less than that of light passing through the light guide bar 520.
  • the amount of light absorbed by the clip 660 is reduced by holding the connecting portion 523 by the clip 660 as compared to the case where the light guide bar 520 is held by the clip 60. be able to. Thereby, the loss of light can be reduced.
  • adjacent light guide rods 720 are connected by a connecting portion 723. Further, at least one of the connecting portions 723 is formed with a protruding portion 724 extending in a direction orthogonal (crossing) to the extending direction of the connecting portion 723.
  • the plurality of light guide rods 720, the connecting portion 723, and the protruding portion 724 are formed of a light-transmitting resin or the like, and are integrally formed by, for example, injection molding using a molding die.
  • the protrusion 724 is formed to extend in parallel with the direction in which the light guide bar 720 extends (direction A).
  • the protruding portion 724 is sandwiched (held) by the clip 760.
  • the protrusion part 724 may protrude from the connection part 723 to the light source 30 side as shown in FIG. 33, or may protrude from the connection part 723 to the side opposite to the light source 30.
  • the protruding portion 724 is provided in the connecting portion 723, and the protruding portion 724 is held by the clip 760.
  • the protruding portion 724 is provided in the connecting portion 723, a part of the light passing through the connecting portion 723 enters the protruding portion 724. Since light entering the projecting portion 724 is less than light passing through the connecting portion 723, the projecting portion 724 is held by the clip 760, so that the connecting portion 523 is held by the clip 660. The amount of light absorbed by the clip 760 can be reduced. Thereby, the loss of light can be further reduced.
  • the protrusion 724 is formed so as to extend in parallel with the direction in which the light guide bar 720 extends, so that the protrusion 724 is parallel to the direction in which the light guide bar 720 extends.
  • the clip 760 can be moved (slid). Thereby, when the light guide bar 720 expands and contracts due to heat, the light guide bar 720 can be prevented from being deformed (for example, the light guide bar 720 is bent).
  • the said embodiment demonstrated the example which has arrange
  • this invention is not limited to this,
  • Two light guide bars 820 may be arranged along the A direction as in the apparatus. That is, the light source 30 and the mounting substrate 31 may be arranged in both the A directions. If comprised in this way, since the light source 30 which is a heat source can be arrange
  • the said embodiment demonstrated the example which has arrange
  • this invention is not limited to this,
  • a plurality (three or more) of light guide bars 920 may be arranged along the short side direction (A direction) of the liquid crystal display panel. If comprised in this way, the light source 30 can be intermittently lighted sequentially in the A direction in synchronization with scanning of a general liquid crystal display panel, and the moving image display performance of the liquid crystal display device can be improved.
  • the present invention is not limited to this, and for example, as shown in FIG.
  • a plurality of connecting portions 1023 may be provided between adjacent light guide bars 1020.
  • the present invention is not limited to this, and the light guide rod and the connecting portion are not integrally formed. May be.
  • the present invention is not limited thereto, and the light guide rod may not be provided with the holding portion. Further, the holding member may not be provided.
  • control part and the engagement recessed part in the holding member was demonstrated in the said embodiment, this invention is not restricted to this, It is not necessary to provide a control part and an engagement recessed part in a holding member. However, only one of the restricting portion and the engaging recess may be provided. Even when only one of the restricting portion and the engaging recess is provided on the holding member, it is possible to prevent the light guide bar from contacting the light source.
  • the light guide part of a light guide rod is formed in shapes other than a rectangular parallelepiped. Also good.
  • the present invention is not limited to this, and the light source is configured to include two or four or more light emitting elements. May be.
  • Liquid crystal display device 2 Liquid crystal display panel (display panel) 10, 110, 210, 310, 410 Backlight device 11 Reflective sheet (reflective member) 12 Diffuser (Optical member) 13 Optical sheet (optical member) 20, 120, 220, 320, 420, 520, 720, 820, 920, 1020 421b, 422b Side surface 21e, 121e, 221e, 321e, 421e Convex part 22a, 122a, 222a, 322a, 422a Tip surface 22e, 122e, 222e, 322e, 422e Processing part (outgoing processing part) 30 Light source 40, 140 Holding member 41b, 141b Engaging recess 41d, 141d Restricting part 42a Front surface (surface of holding member on display panel side) 60, 660, 760 Clip 121c, 122c, 321c, 322c Front side surface (first side surface) 121d, 122d, 3

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A backlight device which produces uniform illumination light and which is lightweight. A backlight device (10) is provided with light guide bars (20) for guiding light emitted from light sources (30). The light guide bars are arranged at predetermined intervals therebetween. The light guide bars (20) are each provided with worked sections (22e) located at the side surfaces (22d) thereof and changing the advance direction of the light, which is emitted from the light sources, to directions which are suitable for the emission of the light to the outside. The portions of each of the light guide bars which are located on the side opposite a liquid crystal display panel (2) are provided with the worked sections, and the portions thereof which are located on the liquid display panel side are not provided with the worked sections.

Description

バックライト装置および表示装置Backlight device and display device
　この発明は、バックライト装置および表示装置に関し、特に、光源と、光源からの光を導光する導光棒とを備えたバックライト装置および表示装置に関する。 The present invention relates to a backlight device and a display device, and more particularly to a backlight device and a display device including a light source and a light guide rod for guiding light from the light source.
　従来、表示パネルを照射するバックライト装置として、直下型のバックライト装置や、エッジライト（サイドライト）型のバックライト装置が知られている。 Conventionally, direct backlight devices and edge light (side light) backlight devices are known as backlight devices that illuminate a display panel.
　直下型のバックライト装置では、光源は表示パネルの真下の位置に２次元（面状）に配置されている。また、直下型のバックライト装置では、バックライト装置の厚みが大きくなるのを抑制しながら照明光の均一性を確保するためには、光源の数を減らすことが困難である。このため、バックライト装置を軽量化するのが困難であるとともに、コストを低減させるのが困難である。 In the direct type backlight device, the light source is two-dimensionally (planar) arranged at a position directly below the display panel. Further, in a direct type backlight device, it is difficult to reduce the number of light sources in order to ensure uniformity of illumination light while suppressing an increase in the thickness of the backlight device. For this reason, it is difficult to reduce the weight of the backlight device, and it is difficult to reduce the cost.
　その一方、エッジライト型のバックライト装置では、表示パネルの真下の位置に導光板が配置されており、導光板の周囲に光源が配置されている。このため、エッジライト型のバックライト装置では、直下型のバックライト装置に比べて、光源の数を減らすことが可能である。 On the other hand, in the edge light type backlight device, a light guide plate is arranged at a position directly below the display panel, and a light source is arranged around the light guide plate. For this reason, in the edge light type backlight device, the number of light sources can be reduced as compared with the direct type backlight device.
　また、導光板は、通常、表示パネルと同程度の面積を有する１つの部材により形成されるが、例えば特許文献１の面発色装置（バックライト装置）のように、複数の導光棒を互いに接するように配置させて導光体を構成した構造も知られている。 In addition, the light guide plate is usually formed by a single member having an area approximately the same as that of the display panel. For example, as in the surface coloring device (backlight device) of Patent Document 1, a plurality of light guide bars are connected to each other. A structure in which a light guide is configured so as to be in contact with each other is also known.
特開２００８－２１８２２３号公報JP 2008-218223 A
　しかしながら、エッジライト型のバックライト装置では、導光板や、複数の導光棒からなる導光体は、表示パネルと同程度の面積を有するので、バックライト装置を軽量化するのが困難であるという問題点がある。また、コストを低減させるのも困難である。 However, in the edge-light type backlight device, the light guide plate and the light guide body composed of a plurality of light guide bars have the same area as the display panel, and thus it is difficult to reduce the weight of the backlight device. There is a problem. It is also difficult to reduce costs.
　この発明は、上記のような課題を解決するためになされたものであり、この発明の目的は、照明光の均一性を確保しながら、軽量化することが可能なバックライト装置および表示装置を提供することである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a backlight device and a display device that can be reduced in weight while ensuring the uniformity of illumination light. Is to provide.
　上記目的を達成するために、この発明の第１の局面によるバックライト装置は、表示パネルの背面側に配置されるバックライト装置であって、複数の光源と、光源からの光が入射される光入射面を有し、光源からの光を導光する複数の導光棒とを備え、複数の導光棒は、互いに所定の間隔を隔てて配置され、導光棒の側面には、導光棒の延びる方向に沿って延びるとともに、光源からの光の進行方向を外部出射に適した方向に変更させる光出射用加工部が設けられており、光出射用加工部は、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の一方に設けられているとともに、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の他方の少なくとも一部には設けられていない。 To achieve the above object, a backlight device according to a first aspect of the present invention is a backlight device disposed on the back side of a display panel, and a plurality of light sources and light from the light sources are incident thereon. A plurality of light guide bars that have a light incident surface and guide light from the light source, and the plurality of light guide bars are arranged at a predetermined interval from each other. A light emitting processing unit is provided that extends along the direction in which the light rod extends and changes the traveling direction of light from the light source to a direction suitable for external emission. The side of the light guide bar is provided on one side of the side opposite to the display panel and the part on the side of the display panel. It is not provided in at least a part of the other.
　この第１の局面によるバックライト装置では、上記のように、光源からの光を導光する複数の導光棒を設けることによって、直下型のバックライト装置と異なり、光源を表示パネルの真下の位置に配置する必要がないので、バックライト装置および表示装置の厚みを小さくすることができる。 In the backlight device according to the first aspect, as described above, by providing a plurality of light guide bars for guiding light from the light source, unlike the direct-type backlight device, the light source is directly below the display panel. Since it is not necessary to arrange in the position, the thickness of the backlight device and the display device can be reduced.
　また、第１の局面によるバックライト装置では、上記のように、複数の導光棒を、互いに所定の間隔を隔てて配置することによって、複数の導光棒の面積を、例えば表示パネルの面積よりも小さくすることができるので、バックライト装置を軽量化することができる。また、バックライト装置のコストを低減することができる。 In the backlight device according to the first aspect, as described above, the plurality of light guide bars are arranged at a predetermined interval from each other, thereby reducing the area of the plurality of light guide bars, for example, the area of the display panel. Therefore, the backlight device can be reduced in weight. In addition, the cost of the backlight device can be reduced.
　なお、複数の導光棒を、互いに所定の間隔を隔てて配置した場合、バックライト装置の厚みを小さくすると、照明光の均一性が低下する可能性がある。しかしながら、第１の局面によるバックライト装置では、上記のように、光出射用加工部を、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の一方に設け、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の他方の少なくとも一部には設けない。このため、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分のいずれの部分から光を出射させるかを制御（設定）することができるので、導光棒から出射した光が表示パネル（または光学部材）に到達するまでの光路長を制御することができる。これにより、導光棒から出射した光を、表示パネル（または光学部材）の広い範囲に到達させることができるので、照明光の均一性が低下するのを抑制することができる。 When a plurality of light guide bars are arranged at a predetermined interval from each other, the uniformity of the illumination light may be reduced if the thickness of the backlight device is reduced. However, in the backlight device according to the first aspect, as described above, the light emission processing portion is provided on one of the side portion of the light guide bar opposite to the display panel and the portion on the display panel side. Of the side surfaces of the light guide bar, the light guide bar is not provided on at least a part of the other part of the part opposite to the display panel and the part on the display panel side. For this reason, it is possible to control (set) whether light is emitted from the portion of the side of the light guide bar opposite to the display panel or the part on the display panel side. The optical path length until the emitted light reaches the display panel (or the optical member) can be controlled. Thereby, since the light radiate | emitted from the light guide rod can be made to reach the wide range of a display panel (or optical member), it can suppress that the uniformity of illumination light falls.
　上記第１の局面によるバックライト装置において、好ましくは、光出射用加工部は、導光棒の側面のうち、表示パネルとは反対側の部分に設けられているとともに、導光棒の側面のうち、表示パネル側の部分の少なくとも一部には設けられていない。このように構成すれば、導光棒から出射した光が表示パネル（または光学部材）に到達するまでの光路長を大きくすることができるので、導光棒から出射した光を、容易に、表示パネル（または光学部材）の広い範囲に到達させることができる。これにより、容易に、照明光の均一性が低下するのを抑制することができる。 In the backlight device according to the first aspect, preferably, the light emitting processing portion is provided on a portion of the side surface of the light guide bar opposite to the display panel, and on the side surface of the light guide bar. Of these, it is not provided in at least a part of the portion on the display panel side. With this configuration, the light path length until the light emitted from the light guide bar reaches the display panel (or optical member) can be increased, so that the light emitted from the light guide bar can be easily displayed. A wide range of panels (or optical members) can be reached. Thereby, it can suppress easily that the uniformity of illumination light falls.
　この場合、好ましくは、導光棒の表示パネル側に配置される光学部材と、導光棒の表示パネルとは反対側に配置される反射部材とをさらに備え、導光棒から光学部材までの距離は、導光棒から反射部材までの距離よりも大きい。このように構成すれば、導光棒から出射した光が表示パネル（または光学部材）に到達するまでの光路長をより大きくすることができるので、導光棒から出射した光を、表示パネル（または光学部材）のより広い範囲に到達させることができる。これにより、照明光の均一性が低下するのをより抑制することができる。 In this case, preferably, an optical member disposed on the display panel side of the light guide bar and a reflection member disposed on the side opposite to the display panel of the light guide bar are further provided, from the light guide bar to the optical member. The distance is larger than the distance from the light guide rod to the reflecting member. If comprised in this way, since the optical path length until the light radiate | emitted from the light guide bar | burr reaches | attains a display panel (or optical member) can be made larger, the light radiate | emitted from the light guide bar | Or a wider range of the optical member). Thereby, it can suppress more that the uniformity of illumination light falls.
　上記第１の局面によるバックライト装置において、好ましくは、光出射用加工部は、導光棒の側面のうち、表示パネル側の部分に設けられているとともに、導光棒の側面のうち、表示パネルとは反対側の部分の少なくとも一部には設けられておらず、光源からの光は、導光棒から、主として表示パネルとは反対側に向かって出射される。このように構成すれば、導光棒から出射した光は、反射部材で反射されてから表示パネル（または光学部材）に到達するので、導光棒から出射した光が表示パネル（または光学部材）に到達するまでの光路長を大きくすることができる。これにより、導光棒から出射した光を、容易に、表示パネル（または光学部材）の広い範囲に到達させることができるので、容易に、照明光の均一性が低下するのを抑制することができる。 In the backlight device according to the first aspect described above, preferably, the light emission processing portion is provided in a portion on the display panel side of the side surface of the light guide bar, and is displayed on the side surface of the light guide bar. It is not provided in at least a part of the part opposite to the panel, and the light from the light source is emitted from the light guide bar mainly toward the side opposite to the display panel. If comprised in this way, since the light radiate | emitted from the light guide bar | burr will reach | attain a display panel (or optical member) after being reflected by a reflecting member, the light radiate | emitted from the light guide bar | burr will be a display panel (or optical member). It is possible to increase the optical path length until reaching. Thereby, since the light radiate | emitted from the light guide rod can be easily made to reach the wide range of a display panel (or optical member), it can suppress that the uniformity of illumination light falls easily. it can.
　この場合、好ましくは、導光棒の表示パネル側に配置される光学部材と、導光棒の表示パネルとは反対側に配置される反射部材とをさらに備え、導光棒から光学部材までの距離は、導光棒から反射部材までの距離よりも小さい。このように構成すれば、導光棒から出射した光が表示パネル（または光学部材）に到達するまでの光路長をより大きくすることができるので、導光棒から出射した光を、表示パネル（または光学部材）のより広い範囲に到達させることができる。これにより、照明光の均一性が低下するのをより抑制することができる。 In this case, preferably, an optical member disposed on the display panel side of the light guide bar and a reflection member disposed on the side opposite to the display panel of the light guide bar are further provided, from the light guide bar to the optical member. The distance is smaller than the distance from the light guide rod to the reflecting member. If comprised in this way, since the optical path length until the light radiate | emitted from the light guide bar | burr reaches | attains a display panel (or optical member) can be made larger, the light radiate | emitted from the light guide bar | Or a wider range of the optical member). Thereby, it can suppress more that the uniformity of illumination light falls.
　上記第１の局面によるバックライト装置において、好ましくは、光出射用加工部は、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の他方には設けられていない。このように構成すれば、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分のいずれの部分から光を出射させるかを、効果的に制御することができる。 In the backlight device according to the first aspect, preferably, the light emitting processing portion is provided on the other side of the side of the light guide bar opposite to the display panel and the portion on the display panel side. Absent. If comprised in this way, it can be controlled effectively from which part of the side of a light guide rod the part on the opposite side to a display panel, and the part by the side of a display panel radiate | emits light.
　上記第１の局面によるバックライト装置において、好ましくは、導光棒は、先細り形状に形成されている。このように構成すれば、導光棒の先端面から光が出射するのを抑制することができるので、光の利用効率を向上させることができる。なお、導光棒の先端面から出射する光が多い場合、導光棒の先端面の近傍の、表示パネルの部分の輝度が高くなる。このため、上記のように、導光棒の先端面から光が出射するのを抑制することによって、表示パネルの輝度の均一性をより向上させることができる。 In the backlight device according to the first aspect, preferably, the light guide bar is formed in a tapered shape. If comprised in this way, since it can suppress that a light radiate | emits from the front end surface of a light-guide rod, the utilization efficiency of light can be improved. In addition, when there is much light radiate | emitted from the front end surface of a light guide bar, the brightness | luminance of the part of the display panel in the vicinity of the front end surface of a light guide bar becomes high. For this reason, as described above, the luminance uniformity of the display panel can be further improved by suppressing the light from being emitted from the tip surface of the light guide bar.
　上記導光棒が先細り形状に形成されているバックライト装置において、好ましくは、光出射用加工部は、導光棒の先端面の一辺の長さと略同じ大きさの幅を有する帯状に形成されている。このように構成すれば、光出射用加工部の幅を一定にすることができる。 In the backlight device in which the light guide bar is formed in a tapered shape, preferably, the light emitting processing portion is formed in a strip shape having a width substantially the same as the length of one side of the tip surface of the light guide bar. ing. If comprised in this way, the width | variety of the process part for light emission can be made constant.
　上記第１の局面によるバックライト装置において、導光棒の側面を、導光棒の光入射面とは反対側から見て、くの字形状に形成してもよい。 In the backlight device according to the first aspect described above, the side surface of the light guide rod may be formed in a dogleg shape when viewed from the side opposite to the light incident surface of the light guide rod.
　上記導光棒の側面が、導光棒の光入射面とは反対側から見て、くの字形状に形成されているバックライト装置において、好ましくは、側面は、第１側面部と、第１側面部の表示パネルとは反対側に配置された第２側面部とを含み、光出射用加工部は、第２側面部および第１側面部の一方のみに設けられている。このように構成すれば、容易に、光出射用加工部を、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の他方の少なくとも一部には設けず、導光棒の側面のうち、表示パネルとは反対側の部分および表示パネル側の部分の一方に設けることができる。 In the backlight device in which the side surface of the light guide rod is formed in a U shape when viewed from the side opposite to the light incident surface of the light guide rod, preferably, the side surface includes a first side surface portion and a first side surface portion. The second side surface portion disposed on the side opposite to the display panel of the one side surface portion, and the light emitting processing portion is provided only on one of the second side surface portion and the first side surface portion. If constituted in this way, the light emission processing part is not easily provided on at least a part of the side part of the light guide bar opposite to the display panel and the other part of the display panel side, Of the side surfaces of the light guide bar, the light guide bar can be provided on one of the part on the opposite side of the display panel and the part on the display panel side.
　上記第１の局面によるバックライト装置において、好ましくは、導光棒の光入射面側の部分を保持する保持部材をさらに備え、導光棒には、凸部が設けられており、保持部材には、導光棒の凸部に係合する係合凹部が設けられている。このように構成すれば、導光棒を保持部材の所定の位置に位置決めすることができるので、バックライト装置の組立作業性を向上させることができる。また、導光棒に凸部を設けることによって、導光棒に係合凹部を設ける場合に比べて、導光棒内を通過する光の進行が妨げられるのを抑制することができる。 In the backlight device according to the first aspect described above, preferably, the backlight device further includes a holding member that holds the light incident surface side portion of the light guide rod, and the light guide rod is provided with a convex portion. Is provided with an engaging recess that engages with the convex portion of the light guide rod. If comprised in this way, since a light guide bar can be positioned in the predetermined position of a holding member, the assembly workability | operativity of a backlight apparatus can be improved. In addition, by providing the convex portion on the light guide rod, it is possible to suppress the progress of light passing through the light guide rod from being hindered compared to the case where the engagement concave portion is provided on the light guide rod.
　上記第１の局面によるバックライト装置において、好ましくは、導光棒の光入射面側の部分を保持する保持部材をさらに備え、保持部材には、導光棒が光源側に移動するのを規制し、導光棒が光源に接触するのを抑制する規制部が設けられている。このように構成すれば、導光棒が光源側に移動するのを抑制することができ、導光棒が光源に接触するのを抑制することができる。 The backlight device according to the first aspect preferably further includes a holding member that holds a portion of the light guide bar on the light incident surface side, and the holding member restricts the light guide bar from moving to the light source side. And the control part which suppresses that a light-guide rod contacts a light source is provided. If comprised in this way, it can suppress that a light guide bar moves to the light source side, and can suppress that a light guide bar contacts a light source.
　上記第１の局面によるバックライト装置において、好ましくは、導光棒の表示パネル側に配置される光学部材と、導光棒の光入射面側の部分を保持する保持部材とをさらに備え、光学部材は、保持部材の表示パネル側の面上に配置されている。このように構成すれば、光学部材を載置する部材を別途設ける場合に比べて、部品点数が増加するのを抑制することができる。 The backlight device according to the first aspect preferably further includes an optical member disposed on the display panel side of the light guide bar, and a holding member that holds a portion of the light incident surface side of the light guide bar. The member is disposed on the surface of the holding member on the display panel side. If comprised in this way, it can suppress that a number of parts increases compared with the case where the member which mounts an optical member is provided separately.
　上記第１の局面によるバックライト装置において、好ましくは、導光棒を保持するクリップをさらに備える。このように構成すれば、導光棒が移動したり、湾曲するのを抑制することができる。 The backlight device according to the first aspect preferably further includes a clip for holding the light guide bar. If comprised in this way, it can suppress that a light guide bar moves or curves.
　上記第１の局面によるバックライト装置において、好ましくは、複数の導光棒は、連結部により連結されている。このように構成すれば、複数の導光棒が別々に形成されている場合に比べて、部品点数を削減することができる。また、複数の導光棒を連結部により連結することによって、複数の導光棒と複数の光源との位置合わせを同時に行うことができるので、バックライト装置の組立作業性を向上させることができる。 In the backlight device according to the first aspect, preferably, the plurality of light guide bars are connected by a connecting portion. If comprised in this way, a number of parts can be reduced compared with the case where the some light guide bar is formed separately. In addition, since the plurality of light guide bars and the plurality of light sources can be aligned at the same time by connecting the plurality of light guide bars with the connecting portion, the assembly workability of the backlight device can be improved. .
　上記複数の導光棒が連結部により連結されているバックライト装置において、好ましくは、連結部を保持するクリップをさらに備える。このように構成すれば、導光棒をクリップにより保持する場合と異なり、導光棒から光が出射するのをクリップにより阻害されることがないので、導光棒をクリップにより保持する場合に比べて、照明光の均一性を向上させることができる。また、複数の導光棒を連結部により連結する場合、導光棒内を通過する光の一部は、連結部を介して、隣接する導光棒同士の間を行き来する。そして、導光棒や連結部をクリップで保持する場合、導光棒や連結部内を通過する光の一部は、導光棒や連結部のクリップに接触する部分から外部に出射しクリップで吸収される。ここで、連結部内を通過する光は、導光棒内を通過する光に比べて少ない。このため、上記のように、連結部をクリップにより保持することによって、導光棒をクリップにより保持する場合に比べて、クリップで吸収される光の量を少なくすることができる。これにより、光の損失を低減することができる。 In the backlight device in which the plurality of light guide bars are connected by the connecting portion, preferably, the backlight device further includes a clip for holding the connecting portion. With this configuration, unlike the case where the light guide bar is held by the clip, the clip does not hinder light from being emitted from the light guide bar, so compared to the case where the light guide bar is held by the clip. Thus, the uniformity of the illumination light can be improved. Moreover, when connecting a some light guide rod by a connection part, a part of light which passes the inside of a light guide rod goes back and forth between adjacent light guide rods via a connection part. When holding the light guide rod or the connecting portion with a clip, a part of the light passing through the light guide rod or the connecting portion is emitted to the outside from the portion of the light guide rod or the connecting portion that contacts the clip and absorbed by the clip. Is done. Here, the amount of light passing through the connecting portion is less than the light passing through the light guide rod. For this reason, as described above, the amount of light absorbed by the clip can be reduced by holding the connecting portion by the clip as compared to the case where the light guide bar is held by the clip. Thereby, the loss of light can be reduced.
　上記複数の導光棒が連結部により連結されているバックライト装置において、好ましくは、連結部には、連結部の延びる方向と交差する方向に延びる突出部が設けられており、突出部は、クリップにより保持されている。このように、連結部に、連結部の延びる方向と交差する方向に延びる突出部を設けた場合、連結部内を通過する光の一部は、突出部内に進入する。この突出部内に進入する光は、連結部内を通過する光に比べて少ないので、突出部をクリップにより保持することにより、連結部をクリップにより保持する場合に比べて、クリップで吸収される光の量を少なくすることができる。これにより、光の損失をより低減することができる。 In the backlight device in which the plurality of light guide rods are connected by the connecting portion, preferably, the connecting portion is provided with a protruding portion extending in a direction intersecting with the extending direction of the connecting portion, It is held by a clip. Thus, when the protrusion part extended in the direction which cross | intersects the extending direction of a connection part is provided in the connection part, a part of light which passes the inside of a connection part approachs into a protrusion part. Since the light entering the projecting portion is less than the light passing through the connecting portion, holding the projecting portion with the clip reduces the amount of light absorbed by the clip as compared to holding the connecting portion with the clip. The amount can be reduced. Thereby, the loss of light can be further reduced.
　上記連結部に突出部が設けられているバックライト装置において、好ましくは、突出部は、導光棒の延びる方向と平行に延びるように形成されている。このように構成すれば、突出部を、導光棒の延びる方向と平行に、クリップに対して移動（摺動）させることができる。これにより、熱により導光棒が伸縮する際に、導光棒が変形する（例えば、導光棒に撓みが発生する）のを抑制することができる。 In the backlight device in which the connecting portion is provided with a protruding portion, the protruding portion is preferably formed so as to extend in parallel with the extending direction of the light guide rod. If comprised in this way, a protrusion part can be moved (sliding) with respect to a clip in parallel with the direction where a light-guide rod is extended. Thereby, when the light guide bar expands and contracts due to heat, the light guide bar can be prevented from being deformed (for example, the light guide bar is bent).
　この発明の第２の局面による表示装置は、上記の構成のバックライト装置と、バックライト装置に照明される表示パネルとを備える。このように構成すれば、照明光の均一性を確保しながら、軽量化することが可能な表示装置を得ることができる。 A display device according to a second aspect of the present invention includes the backlight device configured as described above and a display panel illuminated by the backlight device. If comprised in this way, the display apparatus which can be reduced in weight can be obtained, ensuring the uniformity of illumination light.
　以上のように、本発明によれば、照明光の均一性を確保しながら、軽量化することが可能なバックライト装置および表示装置を容易に得ることができる。 As described above, according to the present invention, it is possible to easily obtain a backlight device and a display device that can be reduced in weight while ensuring the uniformity of illumination light.
本発明の第１実施形態による液晶表示装置の概略的な構造を示した断面図である。1 is a cross-sectional view illustrating a schematic structure of a liquid crystal display device according to a first embodiment of the present invention. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の構造を説明するための平面図である。FIG. 2 is a plan view for explaining the structure of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒および保持部材の構造を示した分解斜視図である。FIG. 2 is an exploded perspective view showing structures of a light guide bar and a holding member of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した斜視図である。FIG. 2 is a perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した側面図である。FIG. 2 is a side view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を説明するための拡大正面図である。FIG. 3 is an enlarged front view for explaining the structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した拡大斜視図である。FIG. 2 is an enlarged perspective view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した拡大図である。FIG. 2 is an enlarged view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した平面図である。FIG. 2 is a plan view showing a structure of a light guide bar of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の構造を示した断面図である。FIG. 2 is a cross-sectional view illustrating a structure of a backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1. 図３に示した保持部材の背面側保持部材の構造を示した拡大断面図である。FIG. 4 is an enlarged cross-sectional view showing a structure of a back side holding member of the holding member shown in FIG. 3. 図３に示した保持部材の背面側保持部材の構造を示した拡大正面図である。It is the enlarged front view which showed the structure of the back side holding member of the holding member shown in FIG. 図３に示した保持部材のカバー部材の構造を示した拡大断面図である。FIG. 4 is an enlarged cross-sectional view illustrating a structure of a cover member of the holding member illustrated in FIG. 3. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した平面図である。FIG. 2 is a plan view showing structures of light guide bars and clips of the backlight device of the liquid crystal display device according to the first embodiment of the present invention shown in FIG. 1. 図１に示した本発明の第１実施形態による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した拡大断面図である。FIG. 2 is an enlarged cross-sectional view illustrating structures of light guide bars and clips of the backlight device of the liquid crystal display device according to the first embodiment of the present invention illustrated in FIG. 1. 本発明の第２実施形態による液晶表示装置のバックライト装置の導光棒および保持部材の構造を示した分解斜視図である。It is the disassembled perspective view which showed the structure of the light guide rod and holding member of the backlight apparatus of the liquid crystal display device by 2nd Embodiment of this invention. 図１６に示した本発明の第２実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した斜視図である。FIG. 17 is a perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16. 図１６に示した本発明の第２実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した側面図である。FIG. 17 is a side view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16. 図１６に示した本発明の第２実施形態による液晶表示装置のバックライト装置の導光棒の構造を説明するための拡大正面図である。FIG. 17 is an enlarged front view for explaining a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention shown in FIG. 16. 図１６に示した本発明の第２実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した拡大斜視図である。FIG. 17 is an enlarged perspective view illustrating a structure of a light guide bar of the backlight device of the liquid crystal display device according to the second embodiment of the present invention illustrated in FIG. 16. 本発明の第３実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した斜視図である。It is the perspective view which showed the structure of the light guide rod of the backlight apparatus of the liquid crystal display device by 3rd Embodiment of this invention. 図２１に示した導光棒の構造を示した側面図である。It is the side view which showed the structure of the light guide bar shown in FIG. 図２１に示した導光棒の構造を説明するための拡大正面図である。It is an enlarged front view for demonstrating the structure of the light guide bar shown in FIG. 本発明の第４実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した斜視図である。It is the perspective view which showed the structure of the light guide rod of the backlight apparatus of the liquid crystal display device by 4th Embodiment of this invention. 図２４に示した導光棒の構造を示した側面図である。It is the side view which showed the structure of the light guide bar shown in FIG. 図２４に示した導光棒の構造を説明するための拡大正面図である。It is an enlarged front view for demonstrating the structure of the light guide bar shown in FIG. 図２４に示した導光棒の構造を示した拡大斜視図である。FIG. 25 is an enlarged perspective view showing the structure of the light guide rod shown in FIG. 24. 本発明の第５実施形態による液晶表示装置のバックライト装置の導光棒の構造を示した斜視図である。It is the perspective view which showed the structure of the light guide rod of the backlight apparatus of the liquid crystal display device by 5th Embodiment of this invention. 図２８に示した導光棒の構造を示した側面図である。It is the side view which showed the structure of the light guide bar shown in FIG. 図２８に示した導光棒の構造を説明するための拡大正面図である。It is an enlarged front view for demonstrating the structure of the light guide bar shown in FIG. 本発明の第６実施形態による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した平面図である。It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 6th Embodiment of this invention. 本発明の第７実施形態による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した平面図である。It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 7th Embodiment of this invention. 本発明の第８実施形態による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した平面図である。It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by 8th Embodiment of this invention. 本発明の第１変形例による液晶表示装置のバックライト装置の構造を説明するための平面図である。It is a top view for demonstrating the structure of the backlight apparatus of the liquid crystal display device by the 1st modification of this invention. 本発明の第２変形例による液晶表示装置のバックライト装置の構造を説明するための平面図である。It is a top view for demonstrating the structure of the backlight apparatus of the liquid crystal display device by the 2nd modification of this invention. 本発明の第３変形例による液晶表示装置のバックライト装置の導光棒およびクリップの構造を示した平面図である。It is the top view which showed the structure of the light guide bar and clip of the backlight apparatus of the liquid crystal display device by the 3rd modification of this invention.
　以下、本発明の実施形態について図面を参照して説明する。なお、理解を容易にするために、断面図であってもハッチングを施さない場合や、側面図や斜視図等であってもハッチングを施す場合がある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In order to facilitate understanding, even a cross-sectional view may not be hatched, or a side view or perspective view may be hatched.
（第１実施形態）
　図１～図１５を参照して、本発明の第１実施形態による液晶表示装置１の構造について説明する。 (First embodiment)
The structure of the liquid crystal display device 1 according to the first embodiment of the present invention will be described with reference to FIGS.
　本発明の第１実施形態による液晶表示装置１は、図１に示すように、液晶表示パネル２と、液晶表示パネル２を照明するバックライト装置１０とを備える。なお、液晶表示装置１は、本発明の「表示装置」の一例であり、液晶表示パネル２は、本発明の「表示パネル」の一例である。 The liquid crystal display device 1 according to the first embodiment of the present invention includes a liquid crystal display panel 2 and a backlight device 10 that illuminates the liquid crystal display panel 2 as shown in FIG. The liquid crystal display device 1 is an example of the “display device” in the present invention, and the liquid crystal display panel 2 is an example of the “display panel” in the present invention.
　液晶表示パネル２は、ＡＭ基板（アクティブマトリックス基板）２ａと、ＡＭ基板２ａに対向配置された対向基板２ｂとを含んでいる。また、ＡＭ基板２ａと対向基板２ｂとの間には、液晶（図示せず）が封入されている。また、ＡＭ基板２ａの受光面（背面）側、および、対向基板２ｂの光出射面（前面）側には、それぞれ、偏光フィルム２ｃおよび２ｄが設けられている。そして、液晶表示パネル２は、バックライト装置１０に照明されることにより、表示パネルとして機能する。 The liquid crystal display panel 2 includes an AM substrate (active matrix substrate) 2a and a counter substrate 2b disposed to face the AM substrate 2a. A liquid crystal (not shown) is sealed between the AM substrate 2a and the counter substrate 2b. Polarizing films 2c and 2d are provided on the light receiving surface (back surface) side of the AM substrate 2a and the light emitting surface (front surface) side of the counter substrate 2b, respectively. The liquid crystal display panel 2 functions as a display panel when illuminated by the backlight device 10.
　バックライト装置１０は、エッジライト（サイドライト）型のバックライト装置であって、棒状の複数の導光棒２０と、導光棒２０の後述する光入射面２１ａに対向配置された複数の光源３０と、導光棒２０の後側（下側）に配置された反射シート１１と、導光棒２０の前側（上側）に配置された拡散板１２および光学シート１３と、導光棒２０の後述する保持部２１を保持する保持部材４０（図３参照）と、これらを収納するバックライトシャーシ５０とを含んでいる。なお、反射シート１１は、本発明の「反射部材」の一例であり、拡散板１２および光学シート１３は、本発明の「光学部材」の一例である。また、図１では、保持部材４０を省略している。 The backlight device 10 is an edge light (side light) type backlight device, and includes a plurality of bar-shaped light guide bars 20 and a plurality of light sources arranged to face a light incident surface 21a (described later) of the light guide bar 20. 30, the reflection sheet 11 disposed on the rear side (lower side) of the light guide bar 20, the diffusion plate 12 and the optical sheet 13 disposed on the front side (upper side) of the light guide bar 20, and the light guide bar 20 The holding member 40 (refer FIG. 3) holding the holding | maintenance part 21 mentioned later is included, and the backlight chassis 50 which accommodates these. The reflection sheet 11 is an example of the “reflection member” in the present invention, and the diffusion plate 12 and the optical sheet 13 are examples of the “optical member” in the present invention. In FIG. 1, the holding member 40 is omitted.
　導光棒２０は、透光性を有する樹脂などにより形成されており、光源３０からの光を全反射させながら導光し、後述する光出射部２２から出射する機能を有する。なお、導光棒２０および保持部材４０の詳細な構造については、後述する。 The light guide rod 20 is formed of a light-transmitting resin or the like, and has a function of guiding light while totally reflecting light from the light source 30 and emitting the light from a light emitting unit 22 described later. The detailed structures of the light guide bar 20 and the holding member 40 will be described later.
　光源３０は、導光棒２０に向かって光を出射するように構成されている。また、光源３０は、例えば白色光を出射する白色ＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）により構成されている。また、光源３０は、例えば、赤色発光素子、緑色発光素子および青色発光素子により構成されていてもよいし、青色発光素子および青色光の一部を黄色光に変換する蛍光体などにより構成されていてもよい。 The light source 30 is configured to emit light toward the light guide bar 20. The light source 30 is configured by, for example, a white LED (Light Emitting Diode) that emits white light. Further, the light source 30 may be composed of, for example, a red light emitting element, a green light emitting element, and a blue light emitting element, or may be composed of a blue light emitting element and a phosphor that converts part of the blue light into yellow light. May be.
　また、複数の光源３０は、図２に示すように、実装基板３１に取り付けられている。この実装基板３１は、第１実施形態では、液晶表示パネル２（図１参照）の短手方向（Ａ方向）の一方に、例えば２つ配置されている。 Further, the plurality of light sources 30 are attached to the mounting substrate 31 as shown in FIG. In the first embodiment, for example, two mounting substrates 31 are arranged on one side in the short side direction (A direction) of the liquid crystal display panel 2 (see FIG. 1).
　なお、バックライト装置１０は、光源３０から出射する光の強度を、光源３０毎に調整可能に構成されている。このため、表示画像に応じて、複数の導光棒２０毎に照明光の強度を制御することが可能であるので、表示画像を高コントラスト化することが可能であるとともに、バックライト装置１０を低消費電力化することが可能である。 The backlight device 10 is configured so that the intensity of light emitted from the light source 30 can be adjusted for each light source 30. For this reason, since it is possible to control the intensity of illumination light for each of the plurality of light guide bars 20 according to the display image, it is possible to increase the contrast of the display image and It is possible to reduce power consumption.
　反射シート１１は、図１に示すように、導光棒２０から出射した光のうち、液晶表示パネル２とは反対側に向かって進行する光を、液晶表示パネル２側に反射させる機能を有する。 As shown in FIG. 1, the reflection sheet 11 has a function of reflecting, to the liquid crystal display panel 2 side, light that travels toward the side opposite to the liquid crystal display panel 2 out of the light emitted from the light guide bar 20. .
　拡散板１２は、導光棒２０（または反射シート１１）からの光を、拡散させて液晶表示パネル２側（光学シート１３側）に出射する機能を有する。 The diffusion plate 12 has a function of diffusing light from the light guide rod 20 (or the reflection sheet 11) and emitting it to the liquid crystal display panel 2 side (optical sheet 13 side).
　光学シート１３は、プリズムシートやレンズシートなどの、例えば複数のシート類により構成されており、拡散板１２からの光を所定の視野角に集光する機能を有する。 The optical sheet 13 is composed of, for example, a plurality of sheets such as a prism sheet and a lens sheet, and has a function of condensing light from the diffusion plate 12 at a predetermined viewing angle.
　なお、拡散板１２および光学シート（プリズムシートやレンズシートなど）１３は、必要に応じて設けられるものであり、無くてもよい。 Note that the diffusion plate 12 and the optical sheet (such as a prism sheet or a lens sheet) 13 are provided as necessary and may be omitted.
　バックライトシャーシ５０は、例えば、金属板を折り曲げることにより形成されている。 The backlight chassis 50 is formed, for example, by bending a metal plate.
　次に、導光棒２０および保持部材４０の詳細な構造について説明する。 Next, the detailed structure of the light guide bar 20 and the holding member 40 will be described.
　第１実施形態では、図２および図３に示すように、複数の導光棒２０は、液晶表示パネル２（図１参照）の短手方向（Ａ方向）に延びるように配置されているとともに、液晶表示パネル２の長手方向（Ｂ方向（Ａ方向と直交する方向））に互いに所定の間隔を隔てて配置されている。また、導光棒２０は、液晶表示パネル２の長手方向（Ｂ方向）に沿って、複数配置されているとともに、液晶表示パネル２の短手方向（Ａ方向）に沿って、１つ配置されている。 In the first embodiment, as shown in FIGS. 2 and 3, the plurality of light guide bars 20 are arranged so as to extend in the short side direction (A direction) of the liquid crystal display panel 2 (see FIG. 1). The liquid crystal display panel 2 is disposed at a predetermined interval in the longitudinal direction (B direction (direction orthogonal to the A direction)). In addition, a plurality of light guide bars 20 are arranged along the longitudinal direction (B direction) of the liquid crystal display panel 2, and one light guide bar 20 is arranged along the short direction (A direction) of the liquid crystal display panel 2. ing.
　導光棒２０は、図４に示すように、保持部材４０（図３参照）に保持される保持部２１と、光源３０（図２参照）からの光を出射する光出射部２２とを含んでいる。 As shown in FIG. 4, the light guide bar 20 includes a holding portion 21 held by a holding member 40 (see FIG. 3) and a light emitting portion 22 that emits light from the light source 30 (see FIG. 2). It is out.
　保持部２１は、例えば、直方体形状に形成されている。具体的には、図４および図５に示すように、保持部２１は、光源３０（図２参照）から出射した光が入射される光入射面２１ａと、前面（上面）２１ｂと、背面（下面）２１ｃと、一対の側面２１ｄとを含んでいる。 The holding part 21 is formed in a rectangular parallelepiped shape, for example. Specifically, as shown in FIGS. 4 and 5, the holding unit 21 includes a light incident surface 21a on which light emitted from the light source 30 (see FIG. 2) is incident, a front surface (upper surface) 21b, and a rear surface ( Lower surface) 21c and a pair of side surfaces 21d.
　光入射面２１ａは、図５に示すように、Ａ方向に対して垂直に形成されている。前面２１ｂおよび背面２１ｃは、互いに平行に形成されているとともに、バックライト装置１０の厚み方向（Ｃ方向）に対して垂直に形成されている。一対の側面２１ｄは、図６に示すように、互いに平行に形成されているとともに、Ｂ方向に対して垂直に形成されている。 As shown in FIG. 5, the light incident surface 21a is formed perpendicular to the A direction. The front surface 21b and the back surface 21c are formed in parallel to each other, and are formed perpendicular to the thickness direction (C direction) of the backlight device 10. As shown in FIG. 6, the pair of side surfaces 21 d are formed in parallel to each other and are formed perpendicular to the B direction.
　また、背面２１ｃには、図５に示すように、下側に突出する凸部２１ｅが形成されている。この凸部２１ｅは、例えば半球形状であってもよいし、その他の形状であってもよい。 Further, as shown in FIG. 5, a convex portion 21e protruding downward is formed on the back surface 21c. For example, the convex portion 21e may have a hemispherical shape or other shapes.
　また、第１実施形態では、図４に示すように、光出射部２２（導光棒２０）は、先細り形状（テーパ形状）に形成されている。 In the first embodiment, as shown in FIG. 4, the light emitting portion 22 (light guide rod 20) is formed in a tapered shape (tapered shape).
　具体的には、光出射部２２は、保持部２１の光入射面２１ａとは反対側（光源３０とは反対側）に形成された先端面２２ａと、前面（上面）２２ｂ（図５参照）と、背面（下面）２２ｃ（図５参照）と、一対の側面２２ｄ（図５および図６参照）とを含んでいる。 Specifically, the light emitting unit 22 includes a front end surface 22a formed on the side opposite to the light incident surface 21a of the holding unit 21 (the side opposite to the light source 30), and a front surface (upper surface) 22b (see FIG. 5). And a back surface (lower surface) 22c (see FIG. 5) and a pair of side surfaces 22d (see FIGS. 5 and 6).
　先端面２２ａは、Ａ方向に対して垂直に形成されている。また、先端面２２ａは、保持部２１の光入射面２１ａよりも小さい面積を有するように形成されている。また、図６に示すように、先端面２２ａのＣ方向の長さは、保持部２１の光入射面２１ａ（図５参照）のＣ方向の長さの半分よりも小さい。 The front end surface 22a is formed perpendicular to the A direction. Further, the tip surface 22 a is formed to have an area smaller than the light incident surface 21 a of the holding unit 21. Further, as shown in FIG. 6, the length in the C direction of the tip surface 22a is smaller than half of the length in the C direction of the light incident surface 21a (see FIG. 5) of the holding portion 21.
　背面２２ｃは、図５および図６に示すように、Ｃ方向に対して垂直に形成されているとともに、保持部２１の背面２１ｃと同一平面上に形成されている。前面２２ｂは、図４および図５に示すように、保持部２１の前面２１ｂに対して傾斜するように形成されているとともに、光入射面２１ａから離れるにしたがって、前面２２ｂと背面２２ｃとの距離が小さくなるように形成されている。 As shown in FIGS. 5 and 6, the back surface 22 c is formed perpendicular to the C direction and is formed on the same plane as the back surface 21 c of the holding portion 21. As shown in FIGS. 4 and 5, the front surface 22b is formed so as to be inclined with respect to the front surface 21b of the holding portion 21, and the distance between the front surface 22b and the back surface 22c as the distance from the light incident surface 21a increases. Is formed to be small.
　一対の側面２２ｄは、図４に示すように、保持部２１の側面２１ｄに対して傾斜するように形成されているとともに、光入射面２１ａから離れるにしたがって、互いの距離が小さくなるように形成されている。 As shown in FIG. 4, the pair of side surfaces 22d are formed so as to be inclined with respect to the side surface 21d of the holding portion 21, and formed such that the distance from each other decreases as the distance from the light incident surface 21a increases. Has been.
　また、第１実施形態では、図４～図７に示すように、光出射部２２の一対の側面２２ｄには、光源３０からの光の進行方向を、外部出射に適した方向に変更させるための加工部２２ｅが形成されている。すなわち、加工部２２ｅは、全反射しながら導光された光を、全反射せずに外部に出射できるように屈折または反射させる機能を有する。このため、例えば図８に示すように、一方の側面２２ｄの加工部２２ｅに到達した光は、主として、一方の側面２２ｄに対向配置された面（他方の側面２２ｄ）から出射される。なお、図４～図７のハッチング領域は、加工部２２ｅを示している。また、加工部２２ｅは、本発明の「光出射用加工部」の一例である。 Further, in the first embodiment, as shown in FIGS. 4 to 7, on the pair of side surfaces 22d of the light emitting portion 22, the traveling direction of light from the light source 30 is changed to a direction suitable for external emission. The processed portion 22e is formed. That is, the processing unit 22e has a function of refracting or reflecting light guided while being totally reflected so that the light can be emitted to the outside without being totally reflected. For this reason, for example, as shown in FIG. 8, the light that has reached the processed portion 22e on one side surface 22d is mainly emitted from the surface (the other side surface 22d) disposed opposite to the one side surface 22d. The hatched areas in FIGS. 4 to 7 show the processed portion 22e. The processed portion 22e is an example of the “light emitting processed portion” in the present invention.
　また、第１実施形態では、図４および図５に示すように、加工部２２ｅは、導光棒２０の延びる方向に沿って延びるように形成されている。また、加工部２２ｅは、先端面２２ａの厚み方向（Ｃ方向）の長さと略同じ大きさの幅を有する帯状に形成されている。すなわち、加工部２２ｅは、先端面２２ａの一辺の長さと略同じ大きさの幅を有する帯状に形成されている。 In the first embodiment, as shown in FIGS. 4 and 5, the processed portion 22 e is formed so as to extend along the direction in which the light guide bar 20 extends. The processed portion 22e is formed in a belt shape having a width that is substantially the same as the length in the thickness direction (C direction) of the distal end surface 22a. That is, the processed portion 22e is formed in a belt shape having a width that is substantially the same as the length of one side of the tip end surface 22a.
　なお、加工部２２ｅは、図８に示したように、例えば複数の三角プリズムにより形成されていてもよいし、プリズムではなく、レンズ（図示せず）や、白色インク（白色塗料）を用いたドット型印刷加工によるドット部（図示せず）により形成されていてもよい。 As shown in FIG. 8, the processing unit 22e may be formed of, for example, a plurality of triangular prisms, or a lens (not shown) or white ink (white paint) is used instead of a prism. You may form by the dot part (not shown) by dot type printing processing.
　加工部２２ｅをプリズムまたはレンズにより形成した場合、光源３０からの光は、加工部２２ｅにより屈折または反射されることにより進行方向が変更され、全反射条件を満たさなくなり外部に出射される。一方、加工部２２ｅをドット型印刷加工によるドット部により形成した場合、光源３０からの光は、加工部２２ｅにより反射または拡散されることにより進行方向が変更され、全反射条件を満たさなくなり外部に出射される。 When the processing unit 22e is formed of a prism or a lens, the traveling direction of the light from the light source 30 is changed by being refracted or reflected by the processing unit 22e, and is not emitted to the outside because the total reflection condition is not satisfied. On the other hand, when the processed portion 22e is formed by a dot portion by dot printing, the traveling direction of the light from the light source 30 is changed by being reflected or diffused by the processed portion 22e, and the total reflection condition is not satisfied and is externally provided. Emitted.
　また、導光棒２０（加工部２２ｅ）から出射する光は、図６に示すように、Ｃ方向に所定の出射角度分布を有した状態で出射される。なお、図６の１点鎖線で囲った領域は、導光棒２０から出射する光のＣ方向の出射角度分布を示している。 Further, the light emitted from the light guide rod 20 (processed portion 22e) is emitted in a state having a predetermined emission angle distribution in the C direction as shown in FIG. In addition, the area | region enclosed with the dashed-dotted line of FIG. 6 has shown the output angle distribution of the C direction of the light radiate | emitted from the light guide rod 20. FIG.
　ここで、バックライト装置１０の薄型化を確保しながら照明光の均一化を図るためには、照明光がより広い範囲で拡散板１２に到達されることが好ましい。 Here, in order to make the illumination light uniform while ensuring the thinning of the backlight device 10, it is preferable that the illumination light reaches the diffusion plate 12 in a wider range.
　そこで、第１実施形態では、導光棒２０から出射した光が拡散板１２に到達するまでの光路長が大きくなるように、バックライト装置１０を形成している。 Therefore, in the first embodiment, the backlight device 10 is formed so that the optical path length until the light emitted from the light guide rod 20 reaches the diffusion plate 12 is increased.
　具体的には、第１実施形態では、図６に示すように、加工部２２ｅを、光出射部２２の側面２２ｄの下側の部分（側面２２ｄのうち、液晶表示パネル２とは反対側の部分）に形成している一方、側面２２ｄの上側の部分（側面２２ｄのうち、液晶表示パネル２側の部分）には形成していない。すなわち、加工部２２ｅは、導光棒２０のＣ方向の中心よりも下側の部分に形成されている一方、導光棒２０のＣ方向の中心よりも上側の部分には形成されていない。 Specifically, in the first embodiment, as illustrated in FIG. 6, the processed portion 22 e is provided on the lower portion of the side surface 22 d of the light emitting portion 22 (of the side surface 22 d on the side opposite to the liquid crystal display panel 2. Is not formed on the portion above the side surface 22d (the portion on the liquid crystal display panel 2 side of the side surface 22d). That is, the processed portion 22e is formed in a portion below the center of the light guide bar 20 in the C direction, but is not formed in a portion above the center of the light guide bar 20 in the C direction.
　また、第１実施形態では、導光棒２０（前面２１ｂ）から拡散板１２までの距離が、導光棒２０（背面２１ｃ）から反射シート１１までの距離よりも大きくなるように、導光棒２０を配置している。 In the first embodiment, the light guide rod 20 is arranged such that the distance from the light guide rod 20 (front surface 21b) to the diffusion plate 12 is larger than the distance from the light guide rod 20 (back surface 21c) to the reflection sheet 11. 20 is arranged.
　また、第１実施形態では、上述したように、光出射部２２（導光棒２０）を、先細り形状（テーパ形状）に形成しているので、図９に示すように、光源３０からの光が光出射部２２の加工部２２ｅ（図８参照）に到達する確率が高くなるとともに、先端面２２ａに到達する確率が低くなる。 In the first embodiment, as described above, since the light emitting portion 22 (light guide rod 20) is formed in a tapered shape (tapered shape), as shown in FIG. Is likely to reach the processed portion 22e (see FIG. 8) of the light emitting portion 22, and the probability of reaching the tip surface 22a is reduced.
　また、図３に示すように、導光棒２０の保持部２１は、保持部材４０により保持されている。具体的には、保持部材４０は、導光棒２０の保持部２１の背面２１ｃ側に配置される背面側保持部材４１と、保持部２１の前面２１ｂ側を覆うカバー部材４２とを含んでいる。背面側保持部材４１およびカバー部材４２は、例えば白色のポリカーボネート樹脂などにより形成されており、光を反射する機能を有する。 Further, as shown in FIG. 3, the holding portion 21 of the light guide bar 20 is held by a holding member 40. Specifically, the holding member 40 includes a back-side holding member 41 disposed on the back surface 21 c side of the holding portion 21 of the light guide bar 20, and a cover member 42 that covers the front surface 21 b side of the holding portion 21. . The back side holding member 41 and the cover member 42 are made of, for example, white polycarbonate resin and have a function of reflecting light.
　背面側保持部材４１は、Ｂ方向に延びる略直方体形状に形成されている。また、背面側保持部材４１には、導光棒２０の保持部２１を保持するための凹部４１ａがＢ方向に所定のピッチで形成されている。 The back side holding member 41 is formed in a substantially rectangular parallelepiped shape extending in the B direction. In addition, the back side holding member 41 is formed with concave portions 41a for holding the holding portion 21 of the light guide bar 20 at a predetermined pitch in the B direction.
　この凹部４１ａには、図１０および図１１に示すように、導光棒２０の凸部２１ｅ（図１０参照）に係合する、例えば半球形状の係合凹部４１ｂが形成されている。この係合凹部４１ｂは、バックライト装置１０を組み立てる際に、導光棒２０を位置決めするために用いられる。なお、係合凹部４１ｂは、導光棒２０がＡ方向に移動するのを抑制する機能を有している。 As shown in FIGS. 10 and 11, the concave portion 41a is formed with, for example, a hemispherical engaging concave portion 41b that engages with the convex portion 21e (see FIG. 10) of the light guide rod 20. The engaging recess 41b is used for positioning the light guide bar 20 when the backlight device 10 is assembled. The engaging recess 41b has a function of suppressing the light guide bar 20 from moving in the A direction.
　また、背面側保持部材４１には、図１０および図１２に示すように、導光棒２０の光入射面２１ａ（図１０参照）に対向するように、開口部４１ｃが形成されている。この開口部４１ｃには、図１０に示すように、光源３０が外側から嵌め込まれている。 Further, as shown in FIGS. 10 and 12, an opening 41 c is formed in the back side holding member 41 so as to face the light incident surface 21 a (see FIG. 10) of the light guide bar 20. As shown in FIG. 10, the light source 30 is fitted into the opening 41c from the outside.
　また、開口部４１ｃの周囲には、図１０～図１２に示すように、導光棒２０が光源３０側に移動するのを規制する規制部４１ｄが形成されている。 Further, around the opening 41c, as shown in FIGS. 10 to 12, a restricting portion 41d for restricting the light guide rod 20 from moving to the light source 30 side is formed.
　カバー部材４２は、図１０に示すように、背面側保持部材４１とにより、導光棒２０を挟み込んで保持するように形成されている。また、カバー部材４２の前面（上面）４２ａ上には、拡散板１２および光学シート１３が配置されている。なお、前面４２ａは、本発明の「保持部材の表示パネル側の面」の一例である。 As shown in FIG. 10, the cover member 42 is formed so as to sandwich and hold the light guide rod 20 with the back side holding member 41. In addition, the diffusion plate 12 and the optical sheet 13 are disposed on the front surface (upper surface) 42 a of the cover member 42. The front surface 42a is an example of the “surface on the display panel side of the holding member” in the present invention.
　また、カバー部材４２の内面４２ｂは、図１０および図１３に示すように、傾斜面に形成されており、導光棒２０から出射しカバー部材４２に到達した光を、拡散板１２側（液晶表示パネル２側）に反射する機能を有する。 Further, as shown in FIGS. 10 and 13, the inner surface 42 b of the cover member 42 is formed on an inclined surface, and the light emitted from the light guide rod 20 and reaching the cover member 42 is diffused on the diffusion plate 12 side (liquid crystal It has a function of reflecting on the display panel 2 side.
　また、図１４に示すように、導光棒２０の光出射部２２は、クリップ６０により挟持（保持）されている。このクリップ６０は、図１５に示すように、導光棒２０の光出射部２２を挟持（保持）する一対の挟持部６０ａと、バックライトシャーシ５０の取付穴５０ａに取り付けられる挿入部６０ｂとを含んでいる。 Further, as shown in FIG. 14, the light emitting portion 22 of the light guide rod 20 is sandwiched (held) by a clip 60. As shown in FIG. 15, the clip 60 includes a pair of sandwiching portions 60 a that sandwich (hold) the light emitting portion 22 of the light guide rod 20, and an insertion portion 60 b that is attached to the attachment hole 50 a of the backlight chassis 50. Contains.
　そして、クリップ６０および保持部材４０（図１０参照）によって、導光棒２０がバックライト装置１０の所定の位置に保持されている。 The light guide bar 20 is held at a predetermined position of the backlight device 10 by the clip 60 and the holding member 40 (see FIG. 10).
　第１実施形態では、上記のように、光源３０からの光を導光する複数の導光棒２０を設けることによって、直下型のバックライト装置と異なり、光源３０を液晶表示パネル２の真下の位置に配置する必要がないので、バックライト装置１０および液晶表示装置１の厚みを小さくすることができる。 In the first embodiment, as described above, by providing the plurality of light guide rods 20 that guide the light from the light source 30, unlike the direct-type backlight device, the light source 30 is directly below the liquid crystal display panel 2. Since it is not necessary to arrange | position in the position, the thickness of the backlight apparatus 10 and the liquid crystal display device 1 can be made small.
　また、第１実施形態では、上記のように、複数の導光棒２０を、互いに所定の間隔を隔てて配置することによって、複数の導光棒２０の面積を、液晶表示パネル２の面積よりも小さくすることができるので、バックライト装置１０を軽量化することができる。また、バックライト装置１０のコストを低減することができる。 In the first embodiment, as described above, the plurality of light guide bars 20 are arranged at a predetermined interval from each other, thereby reducing the area of the plurality of light guide bars 20 from the area of the liquid crystal display panel 2. Therefore, the backlight device 10 can be reduced in weight. In addition, the cost of the backlight device 10 can be reduced.
　なお、複数の導光棒２０を、互いに所定の間隔を隔てて配置した場合、バックライト装置１０の厚みを小さくすると、照明光の均一性が低下する可能性がある。しかしながら、第１実施形態では、上記のように、加工部２２ｅを、導光棒２０の側面２２ｄの下側の部分に設け、導光棒２０の側面２２ｄの上側の部分には設けない。このため、導光棒２０の側面２２ｄの下側の部分から光を出射させることができるとともに、導光棒２０から出射した光が拡散板１２に到達するまでの光路長を大きくすることができる。これにより、導光棒２０から出射した光を、拡散板１２の広い範囲に到達させることができるので、照明光の均一性が低下するのを抑制することができる。 Note that, when the plurality of light guide bars 20 are arranged at a predetermined interval from each other, if the thickness of the backlight device 10 is reduced, the uniformity of the illumination light may be reduced. However, in the first embodiment, as described above, the processed portion 22e is provided in the lower portion of the side surface 22d of the light guide bar 20, and is not provided in the upper portion of the side surface 22d of the light guide bar 20. For this reason, light can be emitted from the lower part of the side surface 22d of the light guide bar 20, and the optical path length until the light emitted from the light guide bar 20 reaches the diffusion plate 12 can be increased. . Thereby, since the light radiate | emitted from the light guide rod 20 can be made to reach | attain the wide range of the diffusion plate 12, it can suppress that the uniformity of illumination light falls.
　また、第１実施形態では、上記のように、導光棒２０から拡散板１２までの距離を、導光棒２０から反射シート１１までの距離よりも大きくすることによって、導光棒２０から出射した光が拡散板１２に到達するまでの光路長をより大きくすることができるので、導光棒２０から出射した光を、拡散板１２のより広い範囲に到達させることができる。これにより、照明光の均一性が低下するのをより抑制することができる。 Further, in the first embodiment, as described above, the distance from the light guide bar 20 to the diffusion plate 12 is set to be larger than the distance from the light guide bar 20 to the reflection sheet 11, thereby emitting from the light guide bar 20. Since the optical path length until the transmitted light reaches the diffusion plate 12 can be further increased, the light emitted from the light guide rod 20 can reach a wider range of the diffusion plate 12. Thereby, it can suppress more that the uniformity of illumination light falls.
　また、第１実施形態では、上記のように、導光棒２０を、先細り形状に形成することによって、光源３０からの光が先端面２２ａに到達する確率が低くなる。これにより、導光棒２０の先端面２２ａから光が出射するのを抑制することができるので、光の利用効率を向上させることができる。なお、導光棒２０の先端面２２ａから出射する光が多い場合、導光棒２０の先端面２２ａの近傍の、液晶表示パネル２の部分の輝度が高くなる。このため、上記のように、導光棒２０の先端面２２ａから光が出射するのを抑制することによって、液晶表示パネル２の輝度の均一性をより向上させることができる。 In the first embodiment, as described above, by forming the light guide bar 20 in a tapered shape, the probability that the light from the light source 30 reaches the tip surface 22a is reduced. Thereby, since it can suppress that light radiate | emits from the front end surface 22a of the light-guide rod 20, the utilization efficiency of light can be improved. In addition, when there is much light radiate | emitted from the front end surface 22a of the light guide rod 20, the brightness | luminance of the part of the liquid crystal display panel 2 in the vicinity of the front end surface 22a of the light guide rod 20 becomes high. For this reason, as described above, the luminance uniformity of the liquid crystal display panel 2 can be further improved by suppressing light from being emitted from the distal end surface 22a of the light guide bar 20.
　また、第１実施形態では、上記のように、加工部２２ｅを、導光棒２０の先端面２２ａの一辺の長さと略同じ大きさの幅を有する帯状に形成することによって、加工部２２ｅの幅を一定にすることができる。 In the first embodiment, as described above, the processed portion 22e is formed in a strip shape having a width substantially the same as the length of one side of the distal end surface 22a of the light guide rod 20, thereby forming the processed portion 22e. The width can be made constant.
　また、第１実施形態では、上記のように、導光棒２０に、凸部２１ｅを設け、保持部材４０に、導光棒２０の凸部２１ｅに係合する係合凹部４１ｂを設けることによって、導光棒２０を保持部材４０の所定の位置に位置決めすることができるので、バックライト装置１０の組立作業性を向上させることができる。また、導光棒２０に凸部２１ｅを設けることによって、導光棒２０に係合凹部を設ける場合に比べて、導光棒２０内を通過する光の進行が妨げられるのを抑制することができる。 In the first embodiment, as described above, the light guide rod 20 is provided with the convex portion 21e, and the holding member 40 is provided with the engagement concave portion 41b that engages with the convex portion 21e of the light guide rod 20. Since the light guide bar 20 can be positioned at a predetermined position of the holding member 40, the assembly workability of the backlight device 10 can be improved. Further, by providing the light guide rod 20 with the convex portion 21e, it is possible to suppress the passage of light passing through the light guide rod 20 from being hindered compared to the case where the light guide rod 20 is provided with the engagement concave portion. it can.
　また、第１実施形態では、上記のように、保持部材４０に、導光棒２０が光源３０側に移動するのを規制する規制部４１ｄを設けることによって、導光棒２０が光源３０に接触するのを抑制することができる。 In the first embodiment, as described above, the light guide bar 20 contacts the light source 30 by providing the holding member 40 with the restricting portion 41 d that restricts the light guide bar 20 from moving toward the light source 30. Can be suppressed.
　なお、第１実施形態では、保持部材４０の係合凹部４１ｂにより、導光棒２０がＡ方向に移動するのを抑制することできる。これにより、導光棒２０が光源３０側に移動するのを抑制することができるので、導光棒２０が光源３０に接触するのをより抑制することができる。 In the first embodiment, the light guide rod 20 can be prevented from moving in the A direction by the engaging recess 41b of the holding member 40. Thereby, since it can suppress that the light guide bar 20 moves to the light source 30 side, it can suppress that the light guide bar 20 contacts the light source 30 more.
　また、係合凹部４１ｂにより、導光棒２０が光源３０とは反対側に移動するのを抑制することができる。これにより、光源３０と導光棒２０との間の距離が大きくなるのを抑制することができるので、光源３０から出射した光が導光棒２０に入射する効率が低下するのを、抑制することができる。 Further, the light guide rod 20 can be prevented from moving to the side opposite to the light source 30 by the engaging recess 41b. Thereby, since it can suppress that the distance between the light source 30 and the light guide rod 20 becomes large, it suppresses that the efficiency which the light radiate | emitted from the light source 30 injects into the light guide rod 20 falls. be able to.
　また、第１実施形態では、上記のように、拡散板１２および光学シート１３を、保持部材４０の前面４２ａ上に配置することによって、拡散板１２および光学シート１３を載置する部材を別途設ける場合に比べて、部品点数が増加するのを抑制することができる。 In the first embodiment, as described above, the diffusion plate 12 and the optical sheet 13 are disposed on the front surface 42a of the holding member 40, so that a member for placing the diffusion plate 12 and the optical sheet 13 is separately provided. Compared to the case, it is possible to suppress an increase in the number of parts.
　また、第１実施形態では、上記のように、導光棒２０を保持するクリップ６０を設けることによって、導光棒２０が移動したり、湾曲するのを抑制することができる。 In the first embodiment, as described above, by providing the clip 60 that holds the light guide bar 20, it is possible to suppress the light guide bar 20 from moving or curving.
（第２実施形態）
　この第２実施形態では、図１６～図２０を参照して、上記第１実施形態と異なり、光源３０からの光が、主として、導光棒１２０から斜め前方向（斜め上方向）に出射される場合について説明する。 (Second Embodiment)
In the second embodiment, referring to FIGS. 16 to 20, unlike the first embodiment, light from the light source 30 is emitted mainly from the light guide rod 120 in an obliquely forward direction (obliquely upward direction). A description will be given of the case.
　本発明の第２実施形態によるバックライト装置１１０では、図１６に示すように、導光棒１２０は、保持部材１４０に保持される保持部１２１と、光源３０からの光を出射する光出射部１２２とを含んでいる。 In the backlight device 110 according to the second embodiment of the present invention, as shown in FIG. 16, the light guide bar 120 includes a holding unit 121 held by the holding member 140 and a light emitting unit that emits light from the light source 30. 122.
　ここで、第２実施形態では、導光棒１２０は、光源３０からの光が、主として、導光棒１２０から斜め前方向（斜め上方向）に出射されるように形成されている。また、導光棒１２０は、上記第１実施形態の導光棒２０を４５度回転させたように形成されている。 Here, in the second embodiment, the light guide bar 120 is formed so that light from the light source 30 is emitted mainly from the light guide bar 120 in an obliquely forward direction (obliquely upward direction). The light guide bar 120 is formed so that the light guide bar 20 of the first embodiment is rotated by 45 degrees.
　具体的には、保持部１２１は、光源３０から出射した光が入射される光入射面１２１ａ（図１７および図１８参照）と、光入射面１２１ａとは反対側から見て、くの字形状の一対の側面１２１ｂ（図１９参照）とを含んでいる。 Specifically, the holding part 121 has a dogleg shape when viewed from the side opposite to the light incident surface 121a (see FIGS. 17 and 18) on which the light emitted from the light source 30 is incident and the light incident surface 121a. And a pair of side surfaces 121b (see FIG. 19).
　また、側面１２１ｂは、図１７～図１９に示すように、前側側面部１２１ｃと、前側側面部１２１ｃの後側（下側）に配置された後側側面部１２１ｄとを含んでいる。前側側面部１２１ｃおよび後側側面部１２１ｄは、Ｃ方向に対して４５度傾斜するように形成されている。なお、前側側面部１２１ｃは、本発明の「第１側面部」の一例であり、後側側面部１２１ｄは、本発明の「第２側面部」の一例である。 Further, as shown in FIGS. 17 to 19, the side surface 121b includes a front side surface portion 121c and a rear side surface portion 121d arranged on the rear side (lower side) of the front side surface portion 121c. The front side surface portion 121c and the rear side surface portion 121d are formed to be inclined by 45 degrees with respect to the C direction. The front side surface portion 121c is an example of the “first side surface portion” in the present invention, and the rear side surface portion 121d is an example of the “second side surface portion” in the present invention.
　また、保持部１２１の後側（下側）の部分には、図１８に示すように、下側に突出する凸部１２１ｅが形成されている。この凸部１２１ｅは、例えば、略直方体形状であってもよいし、その他の形状であってもよい。 Further, as shown in FIG. 18, a convex portion 121e protruding downward is formed on the rear (lower) portion of the holding portion 121. For example, the convex portion 121e may have a substantially rectangular parallelepiped shape or other shape.
　また、第２実施形態では、図１７に示すように、光出射部１２２（導光棒１２０）は、先細り形状（テーパ形状）に形成されている。 Moreover, in 2nd Embodiment, as shown in FIG. 17, the light emission part 122 (light guide bar 120) is formed in the taper shape (taper shape).
　光出射部１２２は、保持部１２１の光入射面１２１ａとは反対側に形成された先端面１２２ａと、先端面１２２ａ側（光入射面１２１ａとは反対側）から見て、くの字形状の一対の側面１２２ｂとを含んでいる。 The light emitting part 122 is formed in a dogleg shape when viewed from the tip surface 122a formed on the side opposite to the light incident surface 121a of the holding part 121 and the tip surface 122a side (the side opposite to the light incident surface 121a). And a pair of side surfaces 122b.
　また、側面１２２ｂは、図１７～図１９に示すように、前側側面部１２２ｃと、前側側面部１２２ｃの後側（下側）に配置された後側側面部１２２ｄとを含んでいる。なお、前側側面部１２２ｃは、本発明の「第１側面部」の一例であり、後側側面部１２２ｄは、本発明の「第２側面部」の一例である。 Further, as shown in FIGS. 17 to 19, the side surface 122b includes a front side surface portion 122c and a rear side surface portion 122d arranged on the rear side (lower side) of the front side surface portion 122c. The front side surface portion 122c is an example of the “first side surface portion” in the present invention, and the rear side surface portion 122d is an example of the “second side surface portion” in the present invention.
　前側側面部１２２ｃは、図１７および図１９に示すように、保持部１２１の前側側面部１２１ｃに対して傾斜するように形成されているとともに、光入射面１２１ａ（図１８参照）から離れるにしたがって、反射シート１１に近づくように形成されている。 As shown in FIGS. 17 and 19, the front side surface portion 122 c is formed so as to be inclined with respect to the front side surface portion 121 c of the holding portion 121, and as the distance from the light incident surface 121 a (see FIG. 18) increases. It is formed so as to approach the reflection sheet 11.
　後側側面部１２２ｄは、保持部１２１の後側側面部１２１ｄと同一平面上に形成されている。 The rear side surface portion 122d is formed on the same plane as the rear side surface portion 121d of the holding portion 121.
　また、第２実施形態では、図１８～図２０に示すように、後側側面部１２２ｄには、光源３０からの光の進行方向を、外部出射に適した方向に変更させるための加工部１２２ｅが形成されている。このため、図１９に示すように、後側側面部１２２ｄに到達した光は、主として、後側側面部１２２ｄに対向配置された面（前側側面部１２２ｃ）から、斜め前方向に出射される。なお、図１８～図２０のハッチング領域は、加工部１２２ｅを示している。また、図１９の１点鎖線で囲った領域は、導光棒１２０から出射する光の出射角度分布を示している。また、加工部１２２ｅは、本発明の「光出射用加工部」の一例である。 In the second embodiment, as shown in FIGS. 18 to 20, the rear side surface portion 122d has a processing portion 122e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission. Is formed. For this reason, as shown in FIG. 19, the light that has reached the rear side surface portion 122d is emitted in a diagonally forward direction mainly from the surface (front side surface portion 122c) disposed to face the rear side surface portion 122d. The hatched areas in FIGS. 18 to 20 show the processed part 122e. Further, the region surrounded by the one-dot chain line in FIG. 19 shows the emission angle distribution of the light emitted from the light guide rod 120. The processing part 122e is an example of the “light emitting processing part” in the present invention.
　また、第２実施形態では、上記第１実施形態と同様、図１９に示すように、加工部１２２ｅは、導光棒１２０の下側の部分（導光棒１２０のＣ方向の中心よりも下側の部分）に形成されている一方、導光棒１２０の上側の部分（導光棒１２０のＣ方向の中心よりも上側の部分）には形成されていない。また、加工部１２２ｅは、先端面１２２ａの一辺の長さと略同じ大きさの幅を有する帯状に形成されている。 Further, in the second embodiment, as in the first embodiment, as shown in FIG. 19, the processed portion 122 e has a lower part of the light guide bar 120 (below the center of the light guide bar 120 in the C direction). On the other hand, it is not formed on the upper part of the light guide bar 120 (the part above the center of the light guide bar 120 in the C direction). Further, the processed portion 122e is formed in a belt shape having a width that is substantially the same as the length of one side of the distal end surface 122a.
　また、上記第１実施形態と同様、導光棒１２０から拡散板１２までの距離が、導光棒１２０から反射シート１１までの距離よりも大きくなるように、導光棒１２０が配置されている。 Further, similarly to the first embodiment, the light guide bar 120 is disposed so that the distance from the light guide bar 120 to the diffusion plate 12 is larger than the distance from the light guide bar 120 to the reflection sheet 11. .
　図１６に示すように、保持部材１４０は、導光棒１２０の保持部１２１の下側に配置される下側保持部材１４１と、保持部１２１の上側を覆うカバー部材１４２とを含んでいる。 As shown in FIG. 16, the holding member 140 includes a lower holding member 141 disposed on the lower side of the holding portion 121 of the light guide bar 120 and a cover member 142 that covers the upper side of the holding portion 121.
　下側保持部材１４１には、導光棒１２０の保持部１２１を保持するための凹部１４１ａがＢ方向に所定のピッチで形成されている。この凹部１４１ａには、導光棒１２０の凸部１２１ｅに係合する係合凹部１４１ｂが形成されている。 In the lower holding member 141, concave portions 141a for holding the holding portion 121 of the light guide rod 120 are formed at a predetermined pitch in the B direction. An engagement recess 141b that engages with the protrusion 121e of the light guide rod 120 is formed in the recess 141a.
　また、下側保持部材１４１には、導光棒１２０の光入射面１２１ａ（図１８参照）に対向するように、開口部１４１ｃが形成されている。また、開口部１４１ｃの周囲には、導光棒１２０が光源３０側に移動するのを規制する規制部１４１ｄが形成されている。 The lower holding member 141 has an opening 141c so as to face the light incident surface 121a (see FIG. 18) of the light guide rod 120. A restricting portion 141d that restricts the light guide rod 120 from moving to the light source 30 side is formed around the opening 141c.
　なお、第２実施形態のその他の構造および効果は、上記第１実施形態と同様である。 The remaining structure and effects of the second embodiment are similar to those of the aforementioned first embodiment.
（第３実施形態）
　この第３実施形態では、図２１～図２３を参照して、上記第１および第２実施形態と異なり、導光棒２２０が略四角柱形状に形成されている場合について説明する。 (Third embodiment)
In the third embodiment, a case where the light guide bar 220 is formed in a substantially quadrangular prism shape will be described with reference to FIGS. 21 to 23, unlike the first and second embodiments.
　本発明の第３実施形態によるバックライト装置２１０（図２３参照）では、図２１に示すように、導光棒２２０は、略四角柱形状に形成されている。 In the backlight device 210 (see FIG. 23) according to the third embodiment of the present invention, as shown in FIG. 21, the light guide bar 220 is formed in a substantially quadrangular prism shape.
　具体的には、導光棒２２０の保持部２２１は、図２１および図２２に示すように、上記第２実施形態と同様、光源３０から出射した光が入射される光入射面２２１ａと、光入射面２２１ａとは反対側から見て、くの字形状の一対の側面２２１ｂとを含んでいる。 Specifically, as shown in FIGS. 21 and 22, the holding portion 221 of the light guide bar 220 includes a light incident surface 221 a on which light emitted from the light source 30 is incident, and light, as in the second embodiment. When viewed from the side opposite to the incident surface 221a, it includes a pair of U-shaped side surfaces 221b.
　また、側面２２１ｂは、上記第２実施形態と同様、前側側面部２２１ｃと、前側側面部２２１ｃの後側（下側）に配置された後側側面部２２１ｄとを含んでいる。また、保持部２２１の後側（下側）の部分には、図２２に示すように、下側に突出する凸部２２１ｅが形成されている。なお、前側側面部２２１ｃは、本発明の「表示パネル側の部分」および「第１側面部」の一例である。また、後側側面部２２１ｄは、本発明の「表示パネルとは反対側の部分」および「第２側面部」の一例である。 Also, the side surface 221b includes a front side surface portion 221c and a rear side surface portion 221d disposed on the rear side (lower side) of the front side surface portion 221c, as in the second embodiment. Further, as shown in FIG. 22, a convex portion 221e that protrudes downward is formed on the rear (lower) portion of the holding portion 221. The front side surface portion 221c is an example of the “display panel side portion” and the “first side surface portion” in the present invention. The rear side surface portion 221d is an example of the “part on the side opposite to the display panel” and the “second side surface portion” of the present invention.
　また、導光棒２２０の光出射部２２２は、保持部２２１の光出射面２２１ａとは反対側に形成された先端面２２２ａと、先端面２２２ａ側（光入射面２２１ａとは反対側）から見て、くの字形状の一対の側面２２２ｂとを含んでいる。 Further, the light emitting portion 222 of the light guide rod 220 is viewed from the tip surface 222a formed on the side opposite to the light emitting surface 221a of the holding portion 221 and the tip surface 222a side (the side opposite to the light incident surface 221a). And a pair of side surfaces 222b having a U-shape.
　また、側面２２２ｂは、前側側面部２２２ｃと、前側側面部２２２ｃの後側（下側）に配置された後側側面部２２２ｄとを含んでいる。なお、前側側面部２２２ｃは、本発明の「表示パネル側の部分」および「第１側面部」の一例である。また、後側側面部２２２ｄは、本発明の「表示パネルとは反対側の部分」および「第２側面部」の一例である。 The side surface 222b includes a front side surface portion 222c and a rear side surface portion 222d arranged on the rear side (lower side) of the front side surface portion 222c. The front side surface portion 222c is an example of the “display panel side portion” and the “first side surface portion” in the present invention. The rear side surface portion 222d is an example of the “part opposite to the display panel” and the “second side surface portion” of the present invention.
　また、第３実施形態では、図２１に示すように、前側側面部２２２ｃは、保持部２２１の前側側面部２２１ｃと同一平面上に形成されているとともに、対向配置された面（後側側面部２２２ｄ）に平行に形成されている。 In the third embodiment, as shown in FIG. 21, the front side surface portion 222 c is formed on the same plane as the front side surface portion 221 c of the holding portion 221, and is a surface (rear side surface portion) disposed opposite to the front side surface portion. 222d).
　また、後側側面部２２２ｄには、図２１～図２３に示すように、光源３０からの光の進行方向を、外部出射に適した方向に変更させるための加工部２２２ｅが形成されている。このため、図２３に示すように、後側側面部２２２ｄに到達した光は、主として、後側側面部２２２ｄに対向配置された面（前側側面部２２２ｃ）から、斜め前方向に出射される。なお、図２１～図２３のハッチング領域は、加工部２２２ｅを示している。また、図２３の１点鎖線で囲った領域は、導光棒２２０から出射する光の出射角度分布を示している。また、加工部２２２ｅは、本発明の「光出射用加工部」の一例である。 Further, as shown in FIGS. 21 to 23, a processing portion 222e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission is formed on the rear side surface portion 222d. For this reason, as shown in FIG. 23, the light that has reached the rear side surface portion 222d is emitted in a diagonally forward direction mainly from the surface (front side surface portion 222c) disposed to face the rear side surface portion 222d. The hatched areas in FIGS. 21 to 23 show the processed part 222e. In addition, a region surrounded by a one-dot chain line in FIG. 23 indicates an emission angle distribution of light emitted from the light guide bar 220. The processed portion 222e is an example of the “light emitting processed portion” in the present invention.
　また、第３実施形態では、図２３に示すように、加工部２２２ｅは、導光棒２２０の下側の部分（後側側面部２２２ｄ）に形成されている一方、導光棒２２０の上側の部分（前側側面部２２２ｃ）には形成されていない。すなわち、加工部２２２ｅは、導光棒２２０のＣ方向の中心よりも下側の部分に形成されている一方、導光棒２２０のＣ方向の中心よりも上側の部分には形成されていない。 In the third embodiment, as shown in FIG. 23, the processed portion 222 e is formed on the lower portion (rear side surface portion 222 d) of the light guide rod 220, while on the upper side of the light guide rod 220. It is not formed on the portion (front side surface portion 222c). That is, the processed portion 222e is formed in a portion below the center of the light guide bar 220 in the C direction, but is not formed in a portion above the center of the light guide bar 220 in the C direction.
　なお、第３実施形態のその他の構造は、上記第２実施形態と同様である。 The remaining structure of the third embodiment is the same as that of the second embodiment.
　また、第３実施形態のその他の効果は、上記第１および第２実施形態と同様である。 The other effects of the third embodiment are the same as those of the first and second embodiments.
（第４実施形態）
　この第４実施形態では、図２４～図２７を参照して、上記第１～第３実施形態と異なり、導光棒３２０の上側（液晶表示パネル２側）の部分に加工部３２２ｅが形成されている場合について説明する。 (Fourth embodiment)
In the fourth embodiment, with reference to FIGS. 24 to 27, unlike the first to third embodiments, a processing portion 322e is formed on the upper side (liquid crystal display panel 2 side) of the light guide bar 320. The case will be described.
　本発明の第４実施形態によるバックライト装置３１０（図２６参照）では、図２４に示すように、導光棒３２０は、保持部３２１と光出射部３２２とを含んでいる。 In the backlight device 310 (see FIG. 26) according to the fourth embodiment of the present invention, the light guide bar 320 includes a holding portion 321 and a light emitting portion 322 as shown in FIG.
　ここで、第４実施形態では、導光棒３２０は、上記第２実施形態の導光棒１２０を上下反転させたように形成されている。そして、導光棒３２０は、光源３０からの光が、主として、導光棒３２０から斜め後方向（斜め下方向）に出射されるように形成されている。 Here, in the fourth embodiment, the light guide bar 320 is formed as if the light guide bar 120 of the second embodiment is turned upside down. The light guide bar 320 is formed so that the light from the light source 30 is emitted from the light guide bar 320 in an obliquely rearward direction (an obliquely downward direction).
　具体的には、保持部３２１は、光源３０から出射した光が入射される光入射面３２１ａ（図２４および図２５参照）と、光入射面３２１ａとは反対側から見て、くの字形状の一対の側面３２１ｂ（図２６参照）とを含んでいる。 Specifically, the holding portion 321 has a dogleg shape when viewed from the side opposite to the light incident surface 321a (see FIGS. 24 and 25) on which light emitted from the light source 30 is incident and the light incident surface 321a. And a pair of side surfaces 321b (see FIG. 26).
　また、側面３２１ｂは、前側側面部３２１ｃと、前側側面部３２１ｃの後側（下側）に配置された後側側面部３２１ｄとを含んでいる。なお、前側側面部３２１ｃは、本発明の「第１側面部」の一例であり、後側側面部３２１ｄは、本発明の「第２側面部」の一例である。 The side surface 321b includes a front side surface portion 321c and a rear side surface portion 321d disposed on the rear side (lower side) of the front side surface portion 321c. The front side surface portion 321c is an example of the “first side surface portion” in the present invention, and the rear side surface portion 321d is an example of the “second side surface portion” in the present invention.
　また、保持部３２１の後側（下側）の部分には、図２５に示すように、下側に突出する凸部３２１ｅが形成されている。 Further, as shown in FIG. 25, a convex portion 321e protruding downward is formed on the rear (lower) portion of the holding portion 321.
　また、第４実施形態では、図２４に示すように、光出射部３２２（導光棒３２０）は、先細り形状（テーパ形状）に形成されている。 Moreover, in 4th Embodiment, as shown in FIG. 24, the light emission part 322 (light guide bar 320) is formed in the taper shape (taper shape).
　光出射部３２２は、図２４～図２６に示すように、保持部３２１の光入射面３２１ａとは反対側に形成された先端面３２２ａと、先端面３２２ａ側（光入射面３２１ａとは反対側）から見て、くの字形状の一対の側面３２２ｂとを含んでいる。 As shown in FIGS. 24 to 26, the light emitting portion 322 includes a tip surface 322a formed on the side opposite to the light incident surface 321a of the holding portion 321 and a tip surface 322a side (the side opposite to the light incident surface 321a). ) And a pair of side surfaces 322b having a dogleg shape.
　また、側面３２２ｂは、前側側面部３２２ｃと、前側側面部３２２ｃの後側（下側）に配置された後側側面部３２２ｄとを含んでいる。なお、前側側面部３２２ｃは、本発明の「第１側面部」の一例であり、後側側面部３２２ｄは、本発明の「第２側面部」の一例である。 The side surface 322b includes a front side surface portion 322c and a rear side surface portion 322d disposed on the rear side (lower side) of the front side surface portion 322c. The front side surface portion 322c is an example of the “first side surface portion” in the present invention, and the rear side surface portion 322d is an example of the “second side surface portion” in the present invention.
　前側側面部３２２ｃは、図２４および図２６に示すように、保持部３２１の前側側面部３２１ｃと同一平面上に形成されている。 The front side surface portion 322c is formed on the same plane as the front side surface portion 321c of the holding portion 321 as shown in FIGS.
　また、第４実施形態では、図２４～図２７に示すように、前側側面部３２２ｃには、光源３０からの光の進行方向を、外部出射に適した方向に変更させるための加工部３２２ｅが形成されている。このため、図２６に示すように、前側側面部３２２ｃに到達した光は、主として、前側側面部３２２ｃに対向配置された面（後側側面部３２２ｄ）から、斜め後方向（液晶表示パネル２とは反対側）に向かって出射される。なお、図２４～図２７のハッチング領域は、加工部３２２ｅを示している。また、図２６の１点鎖線で囲った領域は、導光棒３２０から出射する光の出射角度分布を示している。また、加工部３２２ｅは、本発明の「光出射用加工部」の一例である。 In the fourth embodiment, as shown in FIGS. 24 to 27, the front side surface portion 322c has a processing portion 322e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission. Is formed. For this reason, as shown in FIG. 26, the light that has reached the front side surface portion 322c is mainly obliquely rearward (from the liquid crystal display panel 2 to the rear side surface portion 322d) opposed to the front side surface portion 322c. Is emitted toward the opposite side. The hatched areas in FIGS. 24 to 27 show the processed portion 322e. In addition, a region surrounded by a one-dot chain line in FIG. 26 indicates an emission angle distribution of light emitted from the light guide bar 320. The processed portion 322e is an example of the “light emitting processed portion” in the present invention.
　また、第４実施形態では、上記第１～第３実施形態と異なり、図２６に示すように、加工部３２２ｅは、導光棒３２０の上側の部分（導光棒３２０のＣ方向の中心よりも上側の部分）に形成されている一方、導光棒３２０の下側の部分（導光棒３２０のＣ方向の中心よりも下側の部分）には形成されていない。また、加工部３２２ｅは、先端面３２２ａの一辺の長さと略同じ大きさの幅を有する帯状に形成されている。 Also, in the fourth embodiment, unlike the first to third embodiments, as shown in FIG. 26, the processing portion 322e is provided on the upper part of the light guide bar 320 (from the center of the light guide bar 320 in the C direction). Is not formed in the lower part of the light guide bar 320 (the part below the center of the light guide bar 320 in the C direction). The processed portion 322e is formed in a belt shape having a width that is approximately the same as the length of one side of the tip end surface 322a.
　後側側面部３２２ｄは、図２５および図２６に示すように、保持部３２１の後側側面部３２１ｄに対して傾斜するように形成されているとともに、光入射面３２１ａから離れるにしたがって、反射シート１１から離れるように形成されている。 As shown in FIGS. 25 and 26, the rear side surface portion 322d is formed to be inclined with respect to the rear side surface portion 321d of the holding portion 321, and as the distance from the light incident surface 321a increases, the reflection sheet is formed. 11 is formed so as to be away from 11.
　また、第４実施形態では、上記第１～第３実施形態と異なり、図２６に示すように、導光棒３２０から拡散板１２までの距離が、導光棒３２０から反射シート１１までの距離よりも小さくなるように、導光棒３２０が配置されている。 Further, in the fourth embodiment, unlike the first to third embodiments, as shown in FIG. 26, the distance from the light guide bar 320 to the diffusion plate 12 is the distance from the light guide bar 320 to the reflection sheet 11. The light guide bar 320 is arranged so as to be smaller than that.
　なお、第４実施形態のその他の構造は、上記第２実施形態と同様である。 The remaining structure of the fourth embodiment is similar to that of the aforementioned second embodiment.
　第４実施形態では、上記のように、加工部３２２ｅを、導光棒３２０の上側の部分に設けるとともに、導光棒３２０の下側の部分には設けず、光源３０からの光を、導光棒３２０から、主として斜め下方向に出射させる。これにより、導光棒３２０から出射した光は、反射シート１１で反射されてから拡散板１２に到達するので、導光棒３２０から出射した光が拡散板１２に到達するまでの光路長を大きくすることができる。これにより、導光棒３２０から出射した光を、容易に、拡散板１２の広い範囲に到達させることができるので、容易に、照明光の均一性が低下するのを抑制することができる。 In the fourth embodiment, as described above, the processing portion 322e is provided in the upper part of the light guide bar 320, and is not provided in the lower part of the light guide bar 320, and the light from the light source 30 is guided. The light is emitted from the light rod 320 in a diagonally downward direction. Thereby, the light emitted from the light guide bar 320 reaches the diffusion plate 12 after being reflected by the reflection sheet 11, so that the optical path length until the light emitted from the light guide bar 320 reaches the diffusion plate 12 is increased. can do. Thereby, since the light radiate | emitted from the light-guide rod 320 can be easily made to reach the wide range of the diffusion plate 12, it can suppress that the uniformity of illumination light falls easily.
　また、第４実施形態では、上記のように、導光棒３２０から拡散板１２までの距離を、導光棒３２０から反射シート１１までの距離よりも小さくすることによって、導光棒３２０から出射した光が拡散板１２に到達するまでの光路長をより大きくすることができる。これにより、導光棒３２０から出射した光を、拡散板１２のより広い範囲に到達させることができるので、照明光の均一性が低下するのをより抑制することができる。 Further, in the fourth embodiment, as described above, the distance from the light guide bar 320 to the diffusion plate 12 is made smaller than the distance from the light guide bar 320 to the reflection sheet 11 to emit from the light guide bar 320. It is possible to further increase the optical path length until the received light reaches the diffusion plate 12. Thereby, since the light radiate | emitted from the light guide bar 320 can be made to reach the wider range of the diffusion plate 12, it can suppress more that the uniformity of illumination light falls.
　第４実施形態のその他の効果は、上記第１～第３実施形態と同様である。 Other effects of the fourth embodiment are the same as those of the first to third embodiments.
（第５実施形態）
　この第５実施形態では、図２８～図３０を参照して、上記第４実施形態と異なり、導光棒４２０が略四角柱形状に形成されている場合について説明する。 (Fifth embodiment)
In the fifth embodiment, a case where the light guide bar 420 is formed in a substantially quadrangular prism shape will be described with reference to FIGS. 28 to 30 unlike the fourth embodiment.
　本発明の第５実施形態によるバックライト装置４１０（図３０参照）では、図２８に示すように、導光棒４２０は、略四角柱形状に形成されている。また、導光棒４２０は、上記第３実施形態の導光棒２２０を上下反転させたように形成されている。また、導光棒４２０は、光源３０からの光が、主として、導光棒４２０から斜め後方向（斜め下方向）に出射されるように形成されている。 In the backlight device 410 (see FIG. 30) according to the fifth embodiment of the present invention, as shown in FIG. 28, the light guide bar 420 is formed in a substantially quadrangular prism shape. The light guide bar 420 is formed as if the light guide bar 220 of the third embodiment is turned upside down. The light guide bar 420 is formed such that light from the light source 30 is emitted from the light guide bar 420 in an obliquely rearward direction (an obliquely downward direction).
　具体的には、導光棒４２０の保持部４２１は、図２８および図２９に示すように、上記第４実施形態と同様、光源３０から出射した光が入射される光入射面４２１ａと、光入射面４２１ａとは反対側から見て、くの字形状の一対の側面４２１ｂとを含んでいる。 Specifically, as shown in FIGS. 28 and 29, the holding portion 421 of the light guide bar 420 includes a light incident surface 421a on which light emitted from the light source 30 is incident, and light, as in the fourth embodiment. When viewed from the side opposite to the incident surface 421a, a pair of U-shaped side surfaces 421b is included.
　また、側面４２１ｂは、上記第４実施形態と同様、前側側面部４２１ｃと、前側側面部４２１ｃの後側（下側）に配置された後側側面部４２１ｄとを含んでいる。また、保持部４２１の後側（下側）の部分には、図２９に示すように、下側に突出する凸部４２１ｅが形成されている。なお、前側側面部４２１ｃは、本発明の「表示パネル側の部分」および「第１側面部」の一例である。また、後側側面部４２１ｄは、本発明の「表示パネルとは反対側の部分」および「第２側面部」の一例である。 Also, the side surface 421b includes a front side surface portion 421c and a rear side surface portion 421d disposed on the rear side (lower side) of the front side surface portion 421c, as in the fourth embodiment. Further, as shown in FIG. 29, a convex portion 421e protruding downward is formed on the rear (lower) portion of the holding portion 421. The front side surface portion 421c is an example of the “display panel side portion” and the “first side surface portion” in the present invention. The rear side surface portion 421d is an example of the “part on the side opposite to the display panel” and the “second side surface portion” of the present invention.
　また、導光棒４２０の光出射部４２２は、保持部４２１の光出射面４２１ａとは反対側に形成された先端面４２２ａと、先端面４２２ａ側（光入射面４２１ａとは反対側）から見て、くの字形状の一対の側面４２２ｂとを含んでいる。 In addition, the light emitting portion 422 of the light guide rod 420 is seen from the tip surface 422a formed on the side opposite to the light emitting surface 421a of the holding portion 421 and the tip surface 422a side (the side opposite to the light incident surface 421a). And a pair of side surfaces 422b having a U-shape.
　また、側面４２２ｂは、前側側面部４２２ｃと、前側側面部４２２ｃの後側（下側）に配置された後側側面部４２２ｄとを含んでいる。なお、前側側面部４２２ｃは、本発明の「表示パネル側の部分」および「第１側面部」の一例である。また、後側側面部４２２ｄは、本発明の「表示パネルとは反対側の部分」および「第２側面部」の一例である。 The side surface 422b includes a front side surface portion 422c and a rear side surface portion 422d disposed on the rear side (lower side) of the front side surface portion 422c. The front side surface portion 422c is an example of the “display panel side portion” and the “first side surface portion” in the present invention. The rear side surface portion 422d is an example of the “part opposite to the display panel” and the “second side surface portion” of the present invention.
　また、第５実施形態では、図２８に示すように、前側側面部４２２ｃは、保持部４２１の前側側面部４２１ｃと同一平面上に形成されているとともに、対向配置された面（後側側面部４２２ｄ）に平行に形成されている。 In the fifth embodiment, as shown in FIG. 28, the front side surface portion 422 c is formed on the same plane as the front side surface portion 421 c of the holding portion 421, and is a surface (rear side surface portion) disposed opposite to it. 422d).
　また、前側側面部４２２ｃには、図２８～図３０に示すように、光源３０からの光の進行方向を、外部出射に適した方向に変更させるための加工部４２２ｅが形成されている。このため、図３０に示すように、前側側面部４２２ｃに到達した光は、主として、前側側面部４２２ｃに対向配置された面（後側側面部４２２ｄ）から、斜め後方向（液晶表示パネル２とは反対側）に向かって出射される。なお、図２８～図３０のハッチング領域は、加工部４２２ｅを示している。また、図３０の１点鎖線で囲った領域は、導光棒４２０から出射する光の出射角度分布を示している。また、加工部４２２ｅは、本発明の「光出射用加工部」の一例である。 Further, as shown in FIGS. 28 to 30, a processed portion 422e for changing the traveling direction of light from the light source 30 to a direction suitable for external emission is formed on the front side surface portion 422c. Therefore, as shown in FIG. 30, the light that has reached the front side surface portion 422c is obliquely rearward (from the liquid crystal display panel 2 with respect to the surface (rear side surface portion 422d) opposed to the front side surface portion 422c. Is emitted toward the opposite side. The hatched areas in FIGS. 28 to 30 show the processed part 422e. In addition, a region surrounded by a one-dot chain line in FIG. 30 indicates an emission angle distribution of light emitted from the light guide bar 420. The processed portion 422e is an example of the “light emitting processed portion” in the present invention.
　また、第５実施形態では、上記第４実施形態と同様、加工部４２２ｅは、導光棒４２０の上側の部分（前側側面部４２２ｃ）に形成されている一方、導光棒４２０の下側の部分（後側側面部４２２ｄ）には形成されていない。すなわち、加工部４２２ｅは、導光棒４２０のＣ方向の中心よりも上側の部分に形成されている一方、導光棒４２０のＣ方向の中心よりも下側の部分には形成されていない。 In the fifth embodiment, similarly to the fourth embodiment, the processed portion 422e is formed on the upper portion (front side surface portion 422c) of the light guide bar 420, while the lower portion of the light guide bar 420 is formed. It is not formed on the portion (rear side surface portion 422d). In other words, the processed portion 422e is formed in a portion above the center of the light guide rod 420 in the C direction, but is not formed in a portion below the center of the light guide rod 420 in the C direction.
　なお、第５実施形態のその他の構造は、上記第３および第４実施形態と同様である。 The remaining structure of the fifth embodiment is the same as that of the third and fourth embodiments.
　また、第５実施形態の効果は、上記第１～第４実施形態と同様である。 The effect of the fifth embodiment is the same as that of the first to fourth embodiments.
（第６実施形態）
　この第６実施形態では、図３１を参照して、上記第１～第５実施形態と異なり、複数の導光棒５２０が連結部５２３により連結されている場合について説明する。 (Sixth embodiment)
In the sixth embodiment, a case where a plurality of light guide bars 520 are connected by a connecting portion 523 will be described with reference to FIG. 31, unlike the first to fifth embodiments.
　本発明の第６実施形態によるバックライト装置では、図３１に示すように、隣接する導光棒５２０同士が、連結部５２３により連結されている。この連結部５２３は、導光棒５２０の延びる方向と直交（交差）する方向（Ｂ方向）に延びるように形成されている。 In the backlight device according to the sixth embodiment of the present invention, as shown in FIG. 31, adjacent light guide bars 520 are connected by a connecting portion 523. The connecting portion 523 is formed so as to extend in a direction (B direction) orthogonal to (intersect) the direction in which the light guide bar 520 extends.
　また、連結部５２３は、導光棒５２０よりも小さい断面積を有するように形成されていてもよい。また、連結部５２３は、隣接する導光棒５２０同士の間に、例えば１つずつ設けられている。 Further, the connecting portion 523 may be formed to have a smaller cross-sectional area than the light guide bar 520. Further, for example, one connecting portion 523 is provided between adjacent light guide bars 520.
　また、複数の導光棒５２０および連結部５２３は、透光性を有する樹脂などにより形成されており、例えば、成型金型を用いた射出成型により一体的に形成されている。 Further, the plurality of light guide bars 520 and the connecting portion 523 are formed of a translucent resin or the like, and are integrally formed by, for example, injection molding using a molding die.
　なお、図では、３つの導光棒５２０が連結部５２３により連結されているが、２つまたは４つ以上の導光棒５２０が連結部５２３により連結されていてもよい。また、バックライト装置に含まれる全ての導光棒５２０が連結部５２３により連結されていてもよい。 In the figure, the three light guide bars 520 are connected by the connecting part 523, but two or four or more light guide bars 520 may be connected by the connecting part 523. Further, all the light guide bars 520 included in the backlight device may be connected by the connecting portion 523.
　また、第６実施形態では、複数の導光棒５２０のうちの、例えば１つが、クリップ６０により挟持（保持）されている。 In the sixth embodiment, for example, one of the plurality of light guide bars 520 is sandwiched (held) by the clip 60.
　第６実施形態のその他の構造は、上記第１～第５実施形態と同様である。 The other structure of the sixth embodiment is the same as that of the first to fifth embodiments.
　第６実施形態では、上記のように、複数の導光棒５２０を、連結部５２３により連結することによって、複数の導光棒５２０が別々に形成されている場合に比べて、部品点数を削減することができる。また、複数の導光棒５２０を連結部５２３により連結することによって、複数の導光棒５２０と複数の光源３０との位置合わせを同時に行うことができるので、バックライト装置の組立作業性を向上させることができる。 In the sixth embodiment, as described above, the plurality of light guide bars 520 are connected by the connecting portion 523, thereby reducing the number of parts compared to the case where the plurality of light guide bars 520 are formed separately. can do. Further, since the plurality of light guide bars 520 and the plurality of light sources 30 can be aligned simultaneously by connecting the plurality of light guide bars 520 with the connecting portion 523, the assembly workability of the backlight device is improved. Can be made.
　第６実施形態のその他の効果は、上記第１～第５実施形態と同様である。 Other effects of the sixth embodiment are the same as those of the first to fifth embodiments.
（第７実施形態）
　この第７実施形態によるバックライト装置では、図３２に示すように、上記第６実施形態と異なり、連結部５２３がクリップ６６０により挟持（保持）されている。また、複数の連結部５２３のうちの、例えば１つが、クリップ６６０により挟持（保持）されている。 (Seventh embodiment)
In the backlight device according to the seventh embodiment, as shown in FIG. 32, the connecting portion 523 is clamped (held) by a clip 660, unlike the sixth embodiment. Further, for example, one of the plurality of connecting portions 523 is sandwiched (held) by the clip 660.
　また、連結部５２３は、導光棒５２０の光源３０とは反対側の部分に設けられている。 Further, the connecting portion 523 is provided on a portion of the light guide bar 520 opposite to the light source 30.
　第７実施形態のその他の構造は、上記第１～第６実施形態と同様である。 The other structure of the seventh embodiment is the same as that of the first to sixth embodiments.
　第７実施形態では、上記のように、連結部５２３をクリップ６６０により保持する。これにより、導光棒５２０をクリップ６０により保持する場合と異なり、導光棒５２０から光が出射するのをクリップ６０により阻害されることがないので、導光棒５２０をクリップ６０により保持する場合に比べて、照明光の均一性を向上させることができる。 In the seventh embodiment, the connecting portion 523 is held by the clip 660 as described above. Thus, unlike the case where the light guide bar 520 is held by the clip 60, the light is not blocked by the clip 60 from being emitted from the light guide bar 520, and therefore the case where the light guide bar 520 is held by the clip 60. Compared with, the uniformity of illumination light can be improved.
　また、複数の導光棒５２０を連結部５２３により連結する場合、導光棒５２０内を通過する光の一部は、連結部５２３を介して、隣接する導光棒５２０同士の間を行き来する。そして、導光棒５２０や連結部５２３をクリップ６０や６６０で保持する場合、導光棒５２０や連結部５２３内を通過する光の一部は、導光棒５２０や連結部５２３のクリップ６０や６６０に接触する部分から外部に出射しクリップ６０や６６０で吸収される。ここで、連結部５２３内を通過する光は、導光棒５２０内を通過する光に比べて少ない。このため、第７実施形態のように、連結部５２３をクリップ６６０により保持することによって、導光棒５２０をクリップ６０により保持する場合に比べて、クリップ６６０で吸収される光の量を少なくすることができる。これにより、光の損失を低減することができる。 When a plurality of light guide rods 520 are connected by the connecting portion 523, a part of the light passing through the light guide rod 520 travels between the adjacent light guide rods 520 via the connecting portion 523. . When the light guide bar 520 and the connection part 523 are held by the clips 60 and 660, a part of the light passing through the light guide bar 520 and the connection part 523 is part of the light guide bar 520 and the clip 60 of the connection part 523. The light is emitted to the outside from the portion in contact with 660 and absorbed by clips 60 and 660. Here, the amount of light passing through the connecting portion 523 is less than that of light passing through the light guide bar 520. For this reason, as in the seventh embodiment, the amount of light absorbed by the clip 660 is reduced by holding the connecting portion 523 by the clip 660 as compared to the case where the light guide bar 520 is held by the clip 60. be able to. Thereby, the loss of light can be reduced.
　第７実施形態のその他の効果は、上記第１～第６実施形態と同様である。 The other effects of the seventh embodiment are the same as those of the first to sixth embodiments.
（第８実施形態）
　この第８実施形態では、図３３を参照して、上記第６および第７実施形態と異なり、連結部７２３に突出部７２４が設けられている場合について説明する。 (Eighth embodiment)
In the eighth embodiment, with reference to FIG. 33, a case where the protruding portion 724 is provided in the connecting portion 723 will be described, unlike the sixth and seventh embodiments.
　本発明の第８実施形態によるバックライト装置では、図３３に示すように、隣接する導光棒７２０同士が、連結部７２３により連結されている。そして、連結部７２３の少なくとも１つには、連結部７２３の延びる方向と直交（交差）する方向に延びる突出部７２４が形成されている。 In the backlight device according to the eighth embodiment of the present invention, as shown in FIG. 33, adjacent light guide rods 720 are connected by a connecting portion 723. Further, at least one of the connecting portions 723 is formed with a protruding portion 724 extending in a direction orthogonal (crossing) to the extending direction of the connecting portion 723.
　また、複数の導光棒７２０、連結部７２３および突出部７２４は、透光性を有する樹脂などにより形成されており、例えば、成型金型を用いた射出成型により一体的に形成されている。 Further, the plurality of light guide rods 720, the connecting portion 723, and the protruding portion 724 are formed of a light-transmitting resin or the like, and are integrally formed by, for example, injection molding using a molding die.
　また、第８実施形態では、突出部７２４は、導光棒７２０の延びる方向（Ａ方向）と平行に延びるように形成されている。 In the eighth embodiment, the protrusion 724 is formed to extend in parallel with the direction in which the light guide bar 720 extends (direction A).
　また、第８実施形態では、突出部７２４が、クリップ７６０により挟持（保持）されている。 In the eighth embodiment, the protruding portion 724 is sandwiched (held) by the clip 760.
　なお、突出部７２４は、図３３に示したように、連結部７２３から光源３０側に突出していてもよいし、連結部７２３から光源３０とは反対側に突出していてもよい。 In addition, the protrusion part 724 may protrude from the connection part 723 to the light source 30 side as shown in FIG. 33, or may protrude from the connection part 723 to the side opposite to the light source 30.
　第８実施形態のその他の構造は、上記第第６および第７実施形態と同様である。 Other structures of the eighth embodiment are the same as those of the sixth and seventh embodiments.
　第８実施形態では、上記のように、連結部７２３に突出部７２４を設け、突出部７２４を、クリップ７６０により保持する。このように、連結部７２３に突出部７２４を設けた場合、連結部７２３内を通過する光の一部は、突出部７２４内に進入する。この突出部７２４内に進入する光は、連結部７２３内を通過する光に比べて少ないので、突出部７２４をクリップ７６０により保持することにより、連結部５２３をクリップ６６０により保持する場合に比べて、クリップ７６０で吸収される光の量を少なくすることができる。これにより、光の損失をより低減することができる。 In the eighth embodiment, as described above, the protruding portion 724 is provided in the connecting portion 723, and the protruding portion 724 is held by the clip 760. As described above, when the protruding portion 724 is provided in the connecting portion 723, a part of the light passing through the connecting portion 723 enters the protruding portion 724. Since light entering the projecting portion 724 is less than light passing through the connecting portion 723, the projecting portion 724 is held by the clip 760, so that the connecting portion 523 is held by the clip 660. The amount of light absorbed by the clip 760 can be reduced. Thereby, the loss of light can be further reduced.
　また、第８実施形態では、上記のように、突出部７２４を、導光棒７２０の延びる方向と平行に延びるように形成することによって、突出部７２４を、導光棒７２０の延びる方向と平行に、クリップ７６０に対して移動（摺動）させることができる。これにより、熱により導光棒７２０が伸縮する際に、導光棒７２０が変形する（例えば、導光棒７２０に撓みが発生する）のを抑制することができる。 In the eighth embodiment, as described above, the protrusion 724 is formed so as to extend in parallel with the direction in which the light guide bar 720 extends, so that the protrusion 724 is parallel to the direction in which the light guide bar 720 extends. In addition, the clip 760 can be moved (slid). Thereby, when the light guide bar 720 expands and contracts due to heat, the light guide bar 720 can be prevented from being deformed (for example, the light guide bar 720 is bent).
　第８実施形態のその他の効果は、上記第１～第７実施形態と同様である。 Other effects of the eighth embodiment are the same as those of the first to seventh embodiments.
　なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく請求の範囲によって示され、さらに請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。 In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims, and further includes meanings equivalent to the scope of claims and all modifications within the scope.
　例えば、上記実施形態では、表示パネルおよび表示装置を、それぞれ、液晶表示パネルおよび液晶表示装置に適用した例について示したが、本発明はこれに限らず、液晶表示パネルおよび液晶表示装置以外の表示パネルおよび表示装置に適用してもよい。 For example, in the above-described embodiment, an example in which the display panel and the display device are applied to the liquid crystal display panel and the liquid crystal display device, respectively, has been described. You may apply to a panel and a display apparatus.
　また、上記実施形態では、導光棒を、Ａ方向に１つだけ配置した例について説明したが、本発明はこれに限らず、例えば図３４に示した本発明の第１変形例によるバックライト装置のように、導光棒８２０を、Ａ方向に沿って２つ配置してもよい。すなわち、光源３０および実装基板３１を、Ａ方向の両方に配置してもよい。このように構成すれば、熱源である光源３０を、分散して配置することができるので、光源３０で発生する熱を放熱させやすくできる。また、光源３０およびその周辺部分が高温になるのを抑制することができるので、光源３０や他の回路部品の信頼性が低下するのを抑制することができる。 Moreover, although the said embodiment demonstrated the example which has arrange | positioned only one light guide rod to A direction, this invention is not limited to this, For example, the backlight by the 1st modification of this invention shown in FIG. Two light guide bars 820 may be arranged along the A direction as in the apparatus. That is, the light source 30 and the mounting substrate 31 may be arranged in both the A directions. If comprised in this way, since the light source 30 which is a heat source can be arrange | positioned dispersively, it can be made easy to radiate the heat | fever which generate | occur | produces in the light source 30. Moreover, since it can suppress that the light source 30 and its peripheral part become high temperature, it can suppress that the reliability of the light source 30 and other circuit components falls.
　また、上記実施形態では、導光棒を、Ｂ方向に沿って複数（３つ以上）配置した例について説明したが、本発明はこれに限らず、例えば図３５に示した本発明の第２変形例によるバックライト装置のように、導光棒９２０を、液晶表示パネルの短手方向（Ａ方向）に沿って複数（３つ以上）配置してもよい。このように構成すれば、一般的な液晶表示パネルの走査に同期して光源３０をＡ方向に順次間欠点灯させることができ、液晶表示装置の動画表示性能を向上させることができる。 Moreover, although the said embodiment demonstrated the example which has arrange | positioned the light guide rod in multiple numbers (three or more) along the B direction, this invention is not limited to this, For example, the 2nd of this invention shown in FIG. As in the backlight device according to the modification, a plurality (three or more) of light guide bars 920 may be arranged along the short side direction (A direction) of the liquid crystal display panel. If comprised in this way, the light source 30 can be intermittently lighted sequentially in the A direction in synchronization with scanning of a general liquid crystal display panel, and the moving image display performance of the liquid crystal display device can be improved.
　また、上記第６～第８実施形態では、隣接する導光棒同士の間に、連結部を１つずつ設けた例について説明したが、本発明はこれに限らず、例えば図３６に示した本発明の第３変形例によるバックライト装置のように、隣接する導光棒１０２０同士の間に、連結部１０２３を複数個ずつ設けてもよい。 In the sixth to eighth embodiments, the example in which one connecting portion is provided between the adjacent light guide rods has been described. However, the present invention is not limited to this, and for example, as shown in FIG. As in the backlight device according to the third modification of the present invention, a plurality of connecting portions 1023 may be provided between adjacent light guide bars 1020.
　また、上記第６～第８実施形態では、導光棒および連結部が一体成型されている例について説明したが、本発明はこれに限らず、導光棒および連結部は一体成型されていなくてもよい。 In the sixth to eighth embodiments, the example in which the light guide rod and the connecting portion are integrally formed has been described. However, the present invention is not limited to this, and the light guide rod and the connecting portion are not integrally formed. May be.
　また、上記実施形態では、導光棒に、保持部材により保持される保持部を設けた例について説明したが、本発明はこれに限らず、導光棒に保持部を設けなくてもよい。また、保持部材を設けなくてもよい。 In the above embodiment, the example in which the light guide rod is provided with the holding portion held by the holding member has been described. However, the present invention is not limited thereto, and the light guide rod may not be provided with the holding portion. Further, the holding member may not be provided.
　また、上記実施形態では、保持部材に、規制部および係合凹部を設けた例について説明したが、本発明はこれに限らず、保持部材に、規制部および係合凹部を設けなくてもよいし、規制部および係合凹部の一方のみを設けてもよい。保持部材に、規制部および係合凹部の一方のみを設けた場合であっても、導光棒が光源に接触するのを抑制することができる。 Moreover, although the example which provided the control part and the engagement recessed part in the holding member was demonstrated in the said embodiment, this invention is not restricted to this, It is not necessary to provide a control part and an engagement recessed part in a holding member. However, only one of the restricting portion and the engaging recess may be provided. Even when only one of the restricting portion and the engaging recess is provided on the holding member, it is possible to prevent the light guide bar from contacting the light source.
　また、上記実施形態では、導光棒の保持部を直方体形状に形成した例について説明したが、本発明はこれに限らず、導光棒の導光部を、直方体以外の形状に形成してもよい。 Moreover, although the example which formed the holding | maintenance part of the light guide rod in the rectangular parallelepiped shape was demonstrated in the said embodiment, this invention is not limited to this, The light guide part of a light guide rod is formed in shapes other than a rectangular parallelepiped. Also good.
　また、上記実施形態では、光源を、白色光が得られるように構成した例について説明したが、本発明はこれに限らず、光源を、白色光以外の光が得られるように構成してもよい。 Moreover, although the said embodiment demonstrated the example which comprised the light source so that white light could be obtained, this invention is not restricted to this, You may comprise a light source so that light other than white light may be obtained. Good.
　また、上記実施形態では、光源が、１つまたは３つの発光素子を含む例について説明したが、本発明はこれに限らず、光源を、２つまたは４つ以上の発光素子を含むように構成してもよい。 In the above-described embodiment, the example in which the light source includes one or three light emitting elements has been described. However, the present invention is not limited to this, and the light source is configured to include two or four or more light emitting elements. May be.
　１　液晶表示装置（表示装置）
　２　液晶表示パネル（表示パネル）
　１０、１１０、２１０、３１０、４１０　バックライト装置
　１１　反射シート（反射部材）
　１２　拡散板（光学部材）
　１３　光学シート（光学部材）
　２０、１２０、２２０、３２０、４２０、５２０、７２０、８２０、９２０、１０２０　　導光棒
　２１ａ、１２１ａ、２２１ａ、３２１ａ、４２１ａ　光入射面
　２１ｄ、２２ｄ、１２１ｂ、１２２ｂ、２２１ｂ、２２２ｂ、３２１ｂ、３２２ｂ、４２１ｂ、４２２ｂ　側面
　２１ｅ、１２１ｅ、２２１ｅ、３２１ｅ、４２１ｅ　凸部
　２２ａ、１２２ａ、２２２ａ、３２２ａ、４２２ａ　先端面
　２２ｅ、１２２ｅ、２２２ｅ、３２２ｅ、４２２ｅ　加工部（出射用加工部）
　３０　光源
　４０、１４０　保持部材
　４１ｂ、１４１ｂ　係合凹部
　４１ｄ、１４１ｄ　規制部
　４２ａ　前面（保持部材の表示パネル側の面）
　６０、６６０、７６０　クリップ
　１２１ｃ、１２２ｃ、３２１ｃ、３２２ｃ　前側側面部（第１側面部）
　１２１ｄ、１２２ｄ、３２１ｄ、３２２ｄ　後側側面部（第２側面部）
　２２１ｃ、２２２ｃ、４２１ｃ、４２２ｃ　前側側面部（表示パネル側の部分、第１側面部）
　２２１ｄ、２２２ｄ、４２１ｄ、４２２ｄ　後側側面部（表示パネルとは反対側の部分、第２側面部）
　５２３、７２３、１０２３　連結部
　７２４　突出部 1 Liquid crystal display device (display device)
2 Liquid crystal display panel (display panel)
10, 110, 210, 310, 410 Backlight device 11 Reflective sheet (reflective member)
12 Diffuser (Optical member)
13 Optical sheet (optical member)
20, 120, 220, 320, 420, 520, 720, 820, 920, 1020 421b, 422b Side surface 21e, 121e, 221e, 321e, 421e Convex part 22a, 122a, 222a, 322a, 422a Tip surface 22e, 122e, 222e, 322e, 422e Processing part (outgoing processing part)
30 Light source 40, 140 Holding member 41b, 141b Engaging recess 41d, 141d Restricting part 42a Front surface (surface of holding member on display panel side)
60, 660, 760 Clip 121c, 122c, 321c, 322c Front side surface (first side surface)
121d, 122d, 321d, 322d Rear side surface (second side surface)
221c, 222c, 421c, 422c Front side surface (display panel side, first side surface)
221d, 222d, 421d, 422d Rear side surface (the portion on the opposite side of the display panel, second side surface)
523, 723, 1023 connection part 724 protrusion part

Claims (19)

  1. 　表示パネルの背面側に配置されるバックライト装置であって、
    　複数の光源と、
    　前記光源からの光が入射される光入射面を有し、前記光源からの光を導光する複数の導光棒とを備え、
    　前記複数の導光棒は、互いに所定の間隔を隔てて配置され、
    　前記導光棒の側面には、導光棒の延びる方向に沿って延びるとともに、前記光源からの光の進行方向を外部出射に適した方向に変更させる光出射用加工部が設けられており、
    　前記光出射用加工部は、
    　前記導光棒の側面のうち、前記表示パネルとは反対側の部分および前記表示パネル側の部分の一方に設けられているとともに、
    　前記導光棒の側面のうち、前記表示パネルとは反対側の部分および前記表示パネル側の部分の他方の少なくとも一部には設けられていないことを特徴とするバックライト装置。     A backlight device disposed on the back side of the display panel,
    Multiple light sources;
    A light incident surface on which light from the light source is incident, and a plurality of light guide rods for guiding the light from the light source,
    The plurality of light guide bars are arranged at a predetermined interval from each other,
    A side surface of the light guide bar is provided with a light emitting processing portion that extends along a direction in which the light guide bar extends and changes a traveling direction of light from the light source to a direction suitable for external emission,
    The light emitting processing part is:
    Among the side surfaces of the light guide rod, provided on one of the part on the opposite side of the display panel and the part on the display panel side,
    The backlight device, wherein the light guide bar is not provided on at least a part of the side of the light guide bar opposite to the display panel and the other of the part on the display panel side.
  2. 　前記光出射用加工部は、前記導光棒の側面のうち、前記表示パネルとは反対側の部分に設けられているとともに、前記導光棒の側面のうち、前記表示パネル側の部分の少なくとも一部には設けられていないことを特徴とする請求項１に記載のバックライト装置。 The light emitting processing portion is provided on a part of the side surface of the light guide bar opposite to the display panel, and at least a part of the side surface of the light guide bar on the display panel side. The backlight device according to claim 1, wherein the backlight device is not provided in part.
  3. 　前記導光棒の前記表示パネル側に配置される光学部材と、
    　前記導光棒の前記表示パネルとは反対側に配置される反射部材とをさらに備え、
    　前記導光棒から前記光学部材までの距離は、前記導光棒から前記反射部材までの距離よりも大きいことを特徴とする請求項２に記載のバックライト装置。     An optical member disposed on the display panel side of the light guide bar;
    A reflection member disposed on the opposite side of the light guide bar from the display panel;
    The backlight device according to claim 2, wherein a distance from the light guide bar to the optical member is larger than a distance from the light guide bar to the reflection member.
  4. 　前記光出射用加工部は、前記導光棒の側面のうち、前記表示パネル側の部分に設けられているとともに、前記導光棒の側面のうち、前記表示パネルとは反対側の部分の少なくとも一部には設けられておらず、
    　前記光源からの光は、前記導光棒から、主として前記表示パネルとは反対側に向かって出射されることを特徴とする請求項１に記載のバックライト装置。     The light emission processing portion is provided on a portion of the side surface of the light guide bar on the display panel side, and at least a portion of the side surface of the light guide bar on the side opposite to the display panel. Some are not provided,
    2. The backlight device according to claim 1, wherein light from the light source is emitted mainly from the light guide rod toward a side opposite to the display panel.
  5. 　前記導光棒の前記表示パネル側に配置される光学部材と、
    　前記導光棒の前記表示パネルとは反対側に配置される反射部材とをさらに備え、
    　前記導光棒から前記光学部材までの距離は、前記導光棒から前記反射部材までの距離よりも小さいことを特徴とする請求項４に記載のバックライト装置。     An optical member disposed on the display panel side of the light guide bar;
    A reflection member disposed on the opposite side of the light guide bar from the display panel;
    The backlight device according to claim 4, wherein a distance from the light guide bar to the optical member is smaller than a distance from the light guide bar to the reflection member.
  6. 　前記光出射用加工部は、前記導光棒の側面のうち、前記表示パネルとは反対側の部分および前記表示パネル側の部分の他方には設けられていないことを特徴とする請求項１～５のいずれか１項に記載のバックライト装置。 The light emission processing portion is not provided on a side surface of the light guide bar opposite to a portion on the opposite side of the display panel and the other portion on the display panel side. The backlight device according to any one of 5.
  7. 　前記導光棒は、先細り形状に形成されていることを特徴とする請求項１～６のいずれか１項に記載のバックライト装置。 The backlight device according to any one of claims 1 to 6, wherein the light guide bar is formed in a tapered shape.
  8. 　前記光出射用加工部は、前記導光棒の先端面の一辺の長さと略同じ大きさの幅を有する帯状に形成されていることを特徴とする請求項７に記載のバックライト装置。 The backlight device according to claim 7, wherein the light emitting processing portion is formed in a strip shape having a width substantially the same as the length of one side of the tip surface of the light guide rod.
  9. 　前記導光棒の側面は、前記導光棒の光入射面とは反対側から見て、くの字形状に形成されていることを特徴とする請求項１～８のいずれか１項に記載のバックライト装置。 The side surface of the light guide rod is formed in a dogleg shape when viewed from the side opposite to the light incident surface of the light guide rod. Backlight device.
  10. 　前記側面は、第１側面部と、前記第１側面部の前記表示パネルとは反対側に配置された第２側面部とを含み、
    　前記光出射用加工部は、前記第２側面部および前記第１側面部の一方のみに設けられていることを特徴とする請求項９に記載のバックライト装置。     The side surface includes a first side surface portion and a second side surface portion arranged on the opposite side of the display panel of the first side surface portion,
    The backlight device according to claim 9, wherein the light emitting processing portion is provided only on one of the second side surface portion and the first side surface portion.
  11. 　前記導光棒の光入射面側の部分を保持する保持部材をさらに備え、
    　前記導光棒には、凸部が設けられており、
    　前記保持部材には、前記導光棒の凸部に係合する係合凹部が設けられていることを特徴とする請求項１～１０のいずれか１項に記載のバックライト装置。     A holding member that holds the light incident surface side portion of the light guide rod;
    The light guide rod is provided with a convex portion,
    The backlight device according to any one of claims 1 to 10, wherein the holding member is provided with an engaging concave portion that engages with a convex portion of the light guide rod.
  12. 　前記導光棒の光入射面側の部分を保持する保持部材をさらに備え、
    　前記保持部材には、前記導光棒が前記光源側に移動するのを規制し、前記導光棒が前記光源に接触するのを抑制する規制部が設けられていることを特徴とする請求項１～１１のいずれか１項に記載のバックライト装置。     A holding member that holds the light incident surface side portion of the light guide rod;
    The holding member is provided with a restricting portion that restricts the light guide bar from moving toward the light source and suppresses the light guide bar from contacting the light source. The backlight device according to any one of 1 to 11.
  13. 　前記導光棒の前記表示パネル側に配置される光学部材と、
    　前記導光棒の光入射面側の部分を保持する保持部材とをさらに備え、
    　前記光学部材は、前記保持部材の前記表示パネル側の面上に配置されていることを特徴とする請求項１～１２のいずれか１項に記載のバックライト装置。     An optical member disposed on the display panel side of the light guide bar;
    A holding member that holds the light incident surface side portion of the light guide rod,
    13. The backlight device according to claim 1, wherein the optical member is disposed on a surface of the holding member on the display panel side.
  14. 　前記導光棒を保持するクリップをさらに備えることを特徴とする請求項１～１３のいずれか１項に記載のバックライト装置。 The backlight device according to any one of claims 1 to 13, further comprising a clip for holding the light guide rod.
  15. 　前記複数の導光棒は、連結部により連結されていることを特徴とする請求項１～１４のいずれか１項に記載のバックライト装置。 The backlight device according to any one of claims 1 to 14, wherein the plurality of light guide bars are connected by a connecting portion.
  16. 　前記連結部を保持するクリップをさらに備えることを特徴とする請求項１５に記載のバックライト装置。 The backlight device according to claim 15, further comprising a clip that holds the connecting portion.
  17. 　前記連結部には、前記連結部の延びる方向と交差する方向に延びる突出部が設けられており、
    　前記突出部は、クリップにより保持されていることを特徴とする請求項１５に記載のバックライト装置。     The connecting portion is provided with a protruding portion extending in a direction intersecting with the extending direction of the connecting portion,
    The backlight device according to claim 15, wherein the protrusion is held by a clip.
  18. 　前記突出部は、前記導光棒の延びる方向と平行に延びるように形成されていることを特徴とする請求項１７に記載のバックライト装置。 The backlight device according to claim 17, wherein the protrusion is formed to extend in parallel with a direction in which the light guide rod extends.
  19. 　請求項１～１８のいずれか１項に記載のバックライト装置と、
    　前記バックライト装置に照明される表示パネルとを備えることを特徴とする表示装置。     The backlight device according to any one of claims 1 to 18,
    A display device comprising a display panel illuminated by the backlight device.
PCT/JP2011/060387 2010-06-29 2011-04-28 Backlight device and display device WO2012002034A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019067701A (en) * 2017-10-04 2019-04-25 シャープ株式会社 Light emitting device and liquid crystal display device
CN110673392A (en) * 2019-09-17 2020-01-10 昆山龙腾光电股份有限公司 Backlight source assembly and backlight module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172401A (en) * 1990-11-06 1992-06-19 T T T:Kk Display device
JPH11144514A (en) * 1997-11-07 1999-05-28 Sharp Corp Lighting system and liquid-crystal display device
JP2001092370A (en) * 1999-09-21 2001-04-06 Matsushita Electric Ind Co Ltd Illuminator and display device using the same, and driving method of display device, and liquid crystal display panel
JP2008218223A (en) * 2007-03-05 2008-09-18 Takiron Co Ltd Surface emitting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172401A (en) * 1990-11-06 1992-06-19 T T T:Kk Display device
JPH11144514A (en) * 1997-11-07 1999-05-28 Sharp Corp Lighting system and liquid-crystal display device
JP2001092370A (en) * 1999-09-21 2001-04-06 Matsushita Electric Ind Co Ltd Illuminator and display device using the same, and driving method of display device, and liquid crystal display panel
JP2008218223A (en) * 2007-03-05 2008-09-18 Takiron Co Ltd Surface emitting apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019067701A (en) * 2017-10-04 2019-04-25 シャープ株式会社 Light emitting device and liquid crystal display device
CN109828409A (en) * 2017-10-04 2019-05-31 夏普株式会社 Light emitting device and liquid crystal display device
JP7000105B2 (en) 2017-10-04 2022-02-04 シャープ株式会社 Light emitting device and liquid crystal display device
CN110673392A (en) * 2019-09-17 2020-01-10 昆山龙腾光电股份有限公司 Backlight source assembly and backlight module
CN110673392B (en) * 2019-09-17 2022-12-20 昆山龙腾光电股份有限公司 Backlight source assembly and backlight module

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