WO2012060255A1 - Illumination device and display device - Google Patents

Illumination device and display device Download PDF

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Publication number
WO2012060255A1
WO2012060255A1 PCT/JP2011/074612 JP2011074612W WO2012060255A1 WO 2012060255 A1 WO2012060255 A1 WO 2012060255A1 JP 2011074612 W JP2011074612 W JP 2011074612W WO 2012060255 A1 WO2012060255 A1 WO 2012060255A1
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WO
WIPO (PCT)
Prior art keywords
light
led
light source
main substrate
backlight unit
Prior art date
Application number
PCT/JP2011/074612
Other languages
French (fr)
Japanese (ja)
Inventor
良武 石元
Original Assignee
シャープ株式会社
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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 WO2012060255A1 publication Critical patent/WO2012060255A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the present invention relates to an illumination device that irradiates light toward an object to be irradiated such as a liquid crystal display panel. Moreover, it is related with the display apparatus provided with this illuminating device.
  • the liquid crystal display panel itself that displays an image needs an illumination device on the opposite side of the display surface of the liquid crystal display panel, that is, on the back side.
  • this illumination device irradiates light toward a liquid crystal display panel that is an object to be irradiated, the liquid crystal display device can project an image on the screen.
  • the illumination device arranged on the back side of the display surface of the liquid crystal display panel is called a backlight unit, for example.
  • a light source used for the backlight unit for example, a cold cathode fluorescent lamp and an LED (light emitting diode) are widely known. Further, a direct type is widely known as an illumination method for the backlight unit.
  • the direct type backlight unit has a light source arranged immediately below the liquid crystal display panel, that is, in a region facing the back surface of the liquid crystal display panel.
  • some direct type backlight units include a diffusing plate that diffuses light emitted from the light source.
  • a conventional illumination device which is an example of such a direct type backlight unit is disclosed in Patent Document 1 as a planar light source.
  • the planar light source (illumination device) described in Patent Document 1 has a tray-like box with an open upper surface and light reflecting members provided on the inner surface, and light provided in the box at four corners of the box.
  • a plurality of planar light source units each provided with a semiconductor light emitting element (LED) to be irradiated are juxtaposed, and a light diffusing plate is disposed on the surface of the plurality of planar light source units.
  • LED semiconductor light emitting element
  • Patent Document 1 Furthermore, it is considered that the conventional lighting device described in Patent Document 1 has a very complicated structure and is difficult to assemble. Therefore, there is a high possibility that the productivity of the lighting device is reduced.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide an illuminating device that can illuminate uniformly with no brightness unevenness while having a simple structure. Moreover, it aims at providing the display apparatus provided with such an illuminating device.
  • an illumination device of the present invention includes a main substrate on which a light source is arranged, and a diffusion plate that diffuses light emitted from the light source, and the diffusion plate is disposed on the diffusion plate.
  • the surface to be irradiated with light is arranged so as to be parallel to the arrangement surface of the light source of the main substrate, and the light source is arranged such that the central axis of the light beam of the light source is inclined with respect to the arrangement surface of the main substrate. It is characterized in that it is arranged on the main substrate.
  • the distance until the light of the light source reaches the diffusion plate does not incline the central axis of the light beam. This is longer than when the light source is arranged on the main substrate so as to be substantially perpendicular to the arrangement surface.
  • the light source is disposed between the light source and the main substrate, and supports the light source so that a central axis of a light beam of the light source is inclined with respect to the arrangement surface of the main substrate.
  • a support member is provided.
  • the light source can be supported on the support member and placed on the main substrate after the support member is set in advance so that the central axis of the light beam is inclined with respect to the placement surface of the main substrate.
  • the support member may be fixed to the main board using screws or an adhesive sheet.
  • the support member is a plate-like member having a slope portion that is bent and inclined with respect to the arrangement surface of the main substrate, and supports the light source by the slope portion. It is characterized by that.
  • the light source is arranged on the main substrate so that the central axis of the light beam is inclined with respect to the arrangement surface of the main substrate with a simple structure of a plate-like member.
  • the support member is a fallen triangular columnar member having a slope portion that is inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. It is characterized by that.
  • the support member of the light source is formed of the triangular prism member that is inclined with respect to the arrangement surface of the main substrate, the light source is supported in a state where the inclination of the central axis of the light beam is stable.
  • the support member includes an electrical wiring that electrically connects the light source and the main substrate.
  • the plurality of light sources includes the plurality of light sources arranged side by side on the arrangement surface of the main substrate, and the light emitted from the plurality of light sources is directed in the same direction. It is characterized by being arranged.
  • the amount of light increases on the end side in the direction in which the light emitted from the light source is directed to brighten, and uneven brightness is avoided.
  • the light source includes a plurality of the light sources arranged side by side on the arrangement surface of the main substrate, and light emitted from the plurality of light sources is from one side in an arrangement region of the plurality of light sources.
  • the plurality of light sources are arranged so as to face outward.
  • the amount of light increases in the entire region including the outer edge portion of the apparatus, thereby brightening and avoiding uneven brightness.
  • the light source is arranged.
  • the amount of light is increased and brightened in the entire area, and uneven brightness is avoided.
  • a display device includes the lighting device.
  • the distance until the light reaches the diffusion plate becomes longer than that in the case where the light source is arranged on the main substrate so as to be substantially perpendicular to the arrangement surface without inclining the central axis of the light beam. Therefore, the light scattering in the air layer between the light source and the diffusion plate is relatively increased. Furthermore, since the spread of light from the light source to the diffusion plate is larger than that in the case where the central axis of the light beam is not inclined, the irradiation area of the light source with respect to the diffusion plate becomes relatively wide.
  • an illuminating device that can illuminate uniformly without luminance unevenness while having a simple structure.
  • a display device including such a lighting device and capable of displaying an image or the like uniformly without uneven luminance.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device (display device) including a backlight unit (illumination device) according to a first embodiment of the present invention. It is a vertical sectional view of the light emitting module and the diffusion plate of the backlight unit according to the first embodiment. It is a top view which shows the inclination direction of LED (light source) of the backlight unit which concerns on 1st Embodiment. It is a vertical sectional view showing the vicinity of LEDs of the backlight unit according to the first embodiment. It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a second embodiment of the present invention.
  • liquid crystal display device will be described as an example of the display device of the present invention provided with a backlight unit as an example of the illumination device of the present invention.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device including a backlight unit according to the first embodiment.
  • the liquid crystal display device 1 is a display device using liquid crystal for displaying images, and has a substantially rectangular shape (rectangular shape) in a plan view extending long in the left-right direction.
  • the liquid crystal display device 1 includes a liquid crystal display panel 10 and a backlight unit 20 as shown in FIG.
  • the liquid crystal display panel 10 includes an active matrix substrate 11, a counter substrate 12, and a polarizing sheet 13.
  • the counter substrate 12 may be called a color filter substrate.
  • the active matrix substrate 11 includes a switching element and a pixel electrode made of TFT (Thin Film Transistor) (not shown) on a predetermined surface thereof, and further, a gate line (scanning line) and a source line electrically connected to the switching element. (Data line).
  • the counter substrate 12 includes a common electrode (not shown) on the predetermined surface and, if necessary, a color filter. Each of the active matrix substrate 11 and the counter substrate 12 is covered with an alignment film (not shown) capable of aligning liquid crystals in a specific direction.
  • the active matrix substrate 11 and the counter substrate 12 are bonded to each other through a sealing material (not shown) so that their predetermined surfaces face each other. Further, liquid crystal is sealed between the active matrix substrate 11 and the counter substrate 12. Thereby, the liquid crystal is sandwiched between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12.
  • the polarizing sheet 13 is affixed to each of the surfaces opposite to the predetermined surfaces of the active matrix substrate 11 and the counter substrate 12 enclosing the liquid crystal.
  • the polarizing sheet 13 is a sheet that transmits only a light wave in a specific vibration direction, and is attached in a state where the transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.
  • the liquid crystal display panel 10 having such a configuration adjusts the orientation of the liquid crystal by an electric field generated between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12 based on the video signal, and transmits light transmitted through the liquid crystal. Change the transmittance.
  • the backlight unit 20 is a lighting device adopting a direct type as an illumination system, and includes a backlight chassis 21, a light emitting module 30, a diffusion plate 22, a prism sheet 23, and a lens sheet 24.
  • the backlight chassis 21 is formed in a box shape having a substantially rectangular shape in plan view with an opening on the liquid crystal display panel 10 side.
  • the backlight chassis 21 accommodates the light emitting module 30 inside thereof, that is, on the inner bottom surface 21a side.
  • the light emitting module 30 is a module that emits light for generating backlight light, and is housed inside the backlight chassis 21 and disposed below the liquid crystal display panel 10.
  • the light emitting module 30 includes a plate-like main substrate 31 having a substantially rectangular shape in plan view, and a plurality of LEDs 32 as light sources.
  • the LEDs 32 are formed of white LEDs (light emitting diodes) that emit white light, for example, and a plurality of LEDs 32 are arranged in a substantially grid-like array over the entire arrangement surface 31 a of the main substrate 31.
  • a plurality of LEDs 32 are arranged in a substantially grid-like array over the entire arrangement surface 31 a of the main substrate 31.
  • 64 LEDs 32 are arranged on the arrangement surface 31 a of the main substrate 31.
  • the interval between each of the plurality of LEDs 32 is set to 5 mm to 30 mm, for example.
  • the light source is not limited to the LED, and the LED itself is not limited to one that emits white light. Further, the number and arrangement method of the LEDs 32 are not limited to the above and the shape shown in FIG.
  • the diffuser plate 22, the prism sheet 23, and the lens sheet 24 are arranged so as to close the opening of the backlight chassis 21, and cover the light emitting module 30 from the liquid crystal display panel 10 side.
  • the diffusion plate 22 is disposed closest to the light emitting module 30 and directly receives light emitted from the light emitting module 30.
  • the diffusing plate 22 is arranged such that the surface to be irradiated with light emitted from the light emitting module 30 is parallel to the arrangement surface 31a of the LEDs 32 of the main substrate 31 (see FIG. 2).
  • the distance from the LED 32 to the diffusion plate 22 is set to 5 mm to 20 mm, for example.
  • the diffusion plate 22 diffuses the light emitted from the LED 32 and spreads the light over the entire area of the liquid crystal display panel 10.
  • the prism sheet 23 is provided so as to overlap the liquid crystal display panel 10 side of the diffusion plate 22.
  • the prism sheet 23 for example, triangular prisms extending linearly in one direction are arranged in a direction intersecting in one direction within the sheet surface.
  • the prism sheet 23 deflects the radiation characteristic of light from the diffusion plate 22.
  • the lens sheet 24 is provided so as to overlap the prism sheet 23 on the liquid crystal display panel 10 side.
  • fine particles that refract and scatter light are dispersed inside.
  • the lens sheet 24 suppresses the difference in brightness that causes unevenness in the amount of light without locally condensing from the prism sheet 23.
  • the backlight unit 20 having such a configuration illuminates the back surface of the liquid crystal display panel 10 by irradiating a uniform and uniform backlight light in a planar shape. Since the liquid crystal display panel 10 changes the transmittance of the backlight that transmits the liquid crystal based on the video signal, a desired video is displayed on the display screen of the liquid crystal display panel 10.
  • FIG. 2 is a vertical sectional view of the light emitting module 30 and the diffusion plate 22
  • FIG. 3 is a plan view showing the inclination direction of the LED 32 as a light source
  • FIG. 4 is a vertical sectional view showing the vicinity of the LED 32.
  • the plurality of LEDs 32 arranged side by side on the arrangement surface 31a of the main substrate 31 are provided to be inclined with respect to the arrangement surface 31a so that the light emitted from the LEDs 32 faces in the same direction as shown in FIG.
  • the arrow drawn in FIG. 3 has shown the direction where the light irradiated from LED32 faces.
  • the LEDs 32 are arranged so that the light emitted from all the LEDs 32 faces upward in FIG. 3 with respect to the main substrate 31 having a substantially rectangular shape in plan view extending long in the left-right direction in FIG.
  • each LED 32 is mounted on a plate-like LED substrate 33, and the LED substrate 33 is attached to the main substrate 31. Both the main board 31 and the LED board 33 are provided with electrical wiring (not shown) that is electrically connected. The electrical wiring is connected to the LED 32 to supply power for light emission.
  • the LED 32 is mounted so as to be inclined with respect to the surface of the LED substrate 33, and the LED substrate 33 is attached in close contact with the arrangement surface 31 a of the main substrate 31.
  • the LED 32 is arranged on the main board 31 via the LED board 33 so that the central axis L of the light flux M (shaded part in FIG. 2) of the LED 32 is inclined with respect to the arrangement surface 31a of the main board 31 at an angle ⁇ .
  • the inclination angle ⁇ of the central axis L of the light flux M of the LED 32 with respect to the arrangement surface 31a can be arbitrarily set between 30 ° and 90 °, for example.
  • the LEDs 32 may be directly mounted on the main board 31 without using the LED board 33.
  • the central axis L of the light beam M of the LED 32 is inclined with respect to the arrangement surface 31a of the LED 32 of the main substrate 31, the distance until the light reaches the diffusion plate 22 causes the central axis L of the light beam M to be inclined. It becomes longer than the case where LED32 is arrange
  • the LED 32 is mainly arranged so that the distance until the light reaches the diffusion plate 22 is substantially perpendicular to the arrangement surface 31a without inclining the central axis L of the light beam M. Since it becomes longer than the case where it arrange
  • the backlight unit 20 that is a lighting device that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the liquid crystal display panel 10 which is a display device provided with such a backlight unit 20 and capable of displaying images and the like uniformly without luminance unevenness.
  • FIG. 5 is a vertical sectional view showing the vicinity of the LED 32 which is a light source of the backlight unit 20 according to the second embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • the backlight unit 20 is mounted such that the LEDs 32 are in close contact with the surface of the plate-like LED substrate 33, and the LED substrate 33 is disposed with respect to the arrangement surface 31 a of the main substrate 31. It is mounted in an inclined shape. Thereby, the LED 32 is arranged on the main substrate 31 via the LED substrate 33 so that the central axis L of the light flux M of the LED 32 is inclined at an angle ⁇ with respect to the arrangement surface 31 a of the main substrate 31.
  • the distance until the light reaches the diffusion plate 22 is substantially perpendicular to the arrangement surface 31a without inclining the central axis L of the light beam M. Therefore, the scattering of light in the air layer between the LED 32 and the diffusion plate 22 is relatively increased. Furthermore, since the spread of light from the LED 32 to the diffusion plate 22 is also larger than when the central axis L of the light beam M is not inclined, the irradiation area of the LED 32 on the diffusion plate 22 is also relatively wide. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the LED 32 is mounted in close contact with the surface of the plate-shaped LED substrate 33, and the LED substrate 33 is attached in a form inclined with respect to the arrangement surface 31a of the main substrate 31, so that the LEDs 32 and the It is possible to make the attachment state of the LED substrate 33 relatively stable.
  • FIG. 6 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the third embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • a support member 34 is disposed between the main board 31 and the LED board 33 as shown in FIG.
  • the support member 34 is formed of a plate-like member that extends along the arrangement surface 31 a of the main substrate 31 and is bent so as to form an acute angle when viewed from the side surface.
  • the support member 34 is attached to the arrangement surface 31a of the main substrate 31; a bent portion 34b; and a slope portion 34c that is bent by the bent portion 34b and is inclined with respect to the arrangement surface 31a of the main substrate 31. have. Since the support member 34 supports the LED 32 via the LED substrate 33 at the inclined portion 34c, the LED 32 is inclined such that the central axis L of the light flux M of the LED 32 is inclined with respect to the arrangement surface 31a of the main substrate 31 at an angle ⁇ . Are arranged on the main substrate 31.
  • the support member 34 is fixed to the main board 31 using screws 35. At this time, the support member 34 is fixed to the main board 31 so that the electric wiring 34d provided on the support member 34 and the electric wiring 31b provided on the arrangement surface 31a of the main board 31 are electrically connected. Thereby, the LED 32 and the main board 31 are electrically connected via the LED board 33, and power for light emission is supplied to the LED 32.
  • the LEDs 32 are arranged on the main board 31 so that the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main board 31 with a simple structure of a plate-like member. Is done. Therefore, as in the first and second embodiments, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the support member 34 is provided with the electric wiring 34d for electrically connecting the LED 32 and the main board 31, it also serves as a printed circuit board, and it is not necessary to prepare a separate electric wiring, so that the productivity of the backlight unit 20 can be improved. Improvement and cost reduction can be achieved. Furthermore, since the effect
  • FIG. 7 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the fourth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • a support member 34 is disposed between the main board 31 and the LED board 33 as shown in FIG.
  • the support member 34 is formed of a plate-like member that extends along the arrangement surface 31a of the main substrate 31 and is bent so as to form an obtuse angle when viewed from the side surface. Since the support member 34 supports the LED 32 via the LED substrate 33 at the inclined portion 34 c, the LED 32 is principally arranged such that the central axis L of the light flux M of the LED 32 is inclined at an angle ⁇ with respect to the arrangement surface 31 a of the main substrate 31. Arranged on the substrate 31.
  • the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main substrate 31 with a simple structure of a plate-like member.
  • the LED 32 is disposed on the main board 31. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • FIG. 8 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the fifth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • a support member 36 is disposed between the main board 31 and the LED board 33 as shown in FIG.
  • the support member 36 is formed of a triangular prism member that extends along the arrangement surface 31 a of the main substrate 31.
  • the support member 36 has an inclined surface portion 36 a that is inclined with respect to the arrangement surface 31 a of the main substrate 31. Since the support member 36 supports the LED 32 via the LED substrate 33 at the inclined portion 36a, the LED 32 is inclined such that the central axis L of the light flux M of the LED 32 is inclined at an angle ⁇ with respect to the arrangement surface 31a of the main substrate 31. Are arranged on the main substrate 31.
  • the support member 36 is fixed to the main board 31 using an adhesive sheet 37.
  • the LED 32 has a simple structure and the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main substrate 31. Is disposed on the main board 31. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the support member 36 of the LED 32 is formed of a triangular prism member that is inclined with respect to the arrangement surface 31a of the main substrate 31, the LED 32 is supported in a state where the inclination of the central axis of the light beam M is stable. Thereby, it is possible to further improve the effect of uniformly illuminating the backlight unit 20 without uneven brightness.
  • FIG. 9 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the sixth embodiment.
  • 9 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted.
  • the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • the backlight unit 20 is all over the main board 31 (not shown in FIG. 9, see FIG. 3) having a substantially rectangular shape in plan view extending long in the left-right direction.
  • the LED 32 is arranged so that the light emitted from the LED 32 faces rightward.
  • the arrow drawn in FIG. 9 has shown the direction where the light irradiated from LED32 faces.
  • each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces in the same direction.
  • the right side in FIG. 9 increases the amount of light on the end side in the direction in which the light is directed, thereby brightening the image and avoiding uneven brightness. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the direction in which the light emitted from the LED 32 faces is not limited to the upper side in FIG. 3 of the first embodiment or the right side in FIG. 9 of the sixth embodiment, as shown in FIGS.
  • the LED 32 may be directed downward or to the left when the main board 31 is viewed in plan. Further, the LED 32 may be directed in an oblique direction when the main substrate 31 is viewed in plan. Further, as described above, the inclination angle ⁇ of the central axis L of the light flux M of the LED 32 with respect to the arrangement surface 31a can be arbitrarily set between 30 ° and 90 °, for example.
  • FIG. 10 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the seventh embodiment.
  • 10 is a drawing showing a plurality of LEDs 32 arranged on the main board 31, as in FIG. 3, and drawing of the main board 31 is omitted.
  • the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • the light emitted from the plurality of LEDs 32 faces outward from the one side X ⁇ b> 1 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32.
  • a plurality of LEDs 32 are arranged.
  • the arrow drawn in FIG. 10 has shown the direction where the light irradiated from LED32 faces. Since one side X1 in the arrangement region of the plurality of LEDs 32 extends in the left-right direction at the center in the vertical direction in FIG. 10, the LED 32 above the one side X1 is directed upward, and the LED 32 below the one side X1 is It is inclined to irradiate light downward.
  • the length of the arrow in FIG. 10 indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22. This is related to the magnitude of the inclination angle ⁇ (see, for example, FIG. 4) with respect to the arrangement surface 31 a of the central axis L of the light flux M of the LED 32, and when the inclination angle ⁇ is relatively large, the light reaches the diffusion plate 22.
  • the LEDs 32 are arranged on the main board 31 so that the inclination angle ⁇ decreases as the distance from the one side X ⁇ b> 1 in the LED 32 arrangement region increases upward and downward.
  • each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces outward from the one side X1 in the arrangement region of the plurality of LEDs 32.
  • the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • FIG. 11 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the eighth embodiment.
  • 11 is a drawing showing a plurality of LEDs 32 arranged on the main board 31, as in FIG. 3, and drawing of the main board 31 is omitted.
  • the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • the light emitted from the plurality of LEDs 32 faces outward from the one side X ⁇ b> 2 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32.
  • a plurality of LEDs 32 are arranged.
  • the arrow drawn in FIG. 11 has shown the direction where the light irradiated from LED32 faces. Since one side X2 in the arrangement region of the plurality of LEDs 32 extends in the vertical direction at the center in the left-right direction in FIG. 11, the LED 32 on the right side of the one side X2 faces rightward, and the LED 32 on the left side of the one side X2 It is inclined to irradiate light toward the left.
  • the length of the arrow indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22.
  • the LEDs 32 are arranged on the main board 31 so that the inclination angle ⁇ decreases as the distance from the one side X ⁇ b> 2 in the LED 32 arrangement region increases to the right and left.
  • each LED 32 is arranged so that light emitted from the plurality of LEDs 32 faces outward from one side X2 in the arrangement region of the plurality of LEDs 32.
  • the amount of light increases in the entire area including the outer edge of the apparatus to increase the brightness and avoid the occurrence of uneven brightness. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the direction in which the light emitted from the LED 32 faces is not limited to the vertical direction in FIG. 10 of the seventh embodiment or the horizontal direction in FIG. 11 of the eighth embodiment.
  • the LED 32 may be directed obliquely.
  • the arrangement of the sides X1 and X2 in the arrangement area of the plurality of LEDs 32 is not limited to the vertical center and the horizontal center, but may be unevenly distributed in the vertical direction or the horizontal direction.
  • FIG. 12 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the ninth embodiment.
  • 12 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted.
  • the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes as shown in FIG.
  • the arrow drawn in FIG. 12 has shown the direction where the light irradiated from LED32 faces.
  • the light emitted from the four LEDs 32 surrounded by the broken-line quadrangle is drawn in a quadrangle so that the light rotates clockwise, upward, rightward, downward, and leftward, or the light is counterclockwise.
  • a quadrilateral is drawn to rotate upward, leftward, downward, and rightward.
  • each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • FIG. 13 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the tenth embodiment.
  • FIG. 13 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted.
  • the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
  • a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes as shown in FIG.
  • the arrow drawn in FIG. 13 has shown the direction where the light irradiated from LED32 faces.
  • the light emitted from the eight LEDs 32 drawn by the hatching sandwiched between double broken octagons is clockwise, diagonally upper right, right, diagonally lower right, downward, Draw an octagon to rotate diagonally down left, left and diagonally up left, or light counterclockwise up, diagonal up left, left, diagonal down left, down, diagonal An octagon is drawn to rotate toward the lower right, the right and the diagonally upper right.
  • each LED 32 is arranged so that light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
  • the polygon drawn by the light emitted from the LED 32 is not limited to the quadrangle in FIG. 12 of the ninth embodiment and the octagon in FIG. 13 of the tenth embodiment, but a hexagon or other polygons. It may be.
  • the present invention can be used in an illumination device that irradiates light toward an irradiated object.
  • Liquid crystal display device (display device) 10 Liquid crystal panel 20 Backlight unit (lighting device) 22 Diffusion plate 30 Light emitting module 31 Main substrate 31a Arrangement surface 32 LED (light source) 33 LED board 34 Support member 34a Mounting part 34b Bending part 34c Slope part 34d Electrical wiring 35 Screw 36 Support member 37 Adhesive sheet M Light flux L (light flux) central axis

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Abstract

A backlight unit (20) serving as an illumination device includes: a main substrate (31) on which an LED (32) serving as a light source is arranged; and a diffusion plate (22) for diffusing light emitted from the LED (32). In the backlight unit (20), the diffusion plate (22) is arranged such that a surface to be irradiated of the diffusion plate (22) is in parallel with a surface (31a) of the main substrate (31) on which the LED (32) is arranged, and the LED (32) is arranged on the main substrate (31) such that a center axis (L) of a luminous flux (M) of the LED (32) is inclined with respect to the surface (31a) of the main substrate (31).

Description

照明装置及び表示装置Lighting device and display device
　本発明は、例えば液晶表示パネルなどの被照射体に向かって光を照射する照明装置に関する。また、この照明装置を備えた表示装置に関する。 The present invention relates to an illumination device that irradiates light toward an object to be irradiated such as a liquid crystal display panel. Moreover, it is related with the display apparatus provided with this illuminating device.
　代表的な表示装置である液晶表示装置は一般的に映像を映し出す液晶表示パネル自体が発光しないので、液晶表示パネルの表示面の反対側、すなわち裏側に照明装置を必要としている。この照明装置が被照射体である液晶表示パネルに向かって光を照射することにより、液晶表示装置はその画面上に映像を映し出すことが可能になっている。このように液晶表示パネルの表示面の裏側に配置される照明装置を、例えばバックライトユニットと呼んでいる。 Since a liquid crystal display device that is a typical display device generally does not emit light, the liquid crystal display panel itself that displays an image needs an illumination device on the opposite side of the display surface of the liquid crystal display panel, that is, on the back side. When this illumination device irradiates light toward a liquid crystal display panel that is an object to be irradiated, the liquid crystal display device can project an image on the screen. The illumination device arranged on the back side of the display surface of the liquid crystal display panel is called a backlight unit, for example.
　バックライトユニットに使用する光源としては、例えば冷陰極蛍光ランプやＬＥＤ（発光ダイオード）が広く知られている。また、バックライトユニットの照明方式としては直下型方式が広く知られている。 As a light source used for the backlight unit, for example, a cold cathode fluorescent lamp and an LED (light emitting diode) are widely known. Further, a direct type is widely known as an illumination method for the backlight unit.
　直下型のバックライトユニットは液晶表示パネルの直下、すなわち液晶表示パネルの裏面と対向する領域に光源を配置したものである。なお、光源からの光を液晶表示パネルに効果的に照射するため、直下型バックライトユニットは光源から照射される光を拡散させる拡散板を備えているものがある。このような直下型バックライトユニットの一例である従来の照明装置が面状光源として特許文献１に開示されている。 The direct type backlight unit has a light source arranged immediately below the liquid crystal display panel, that is, in a region facing the back surface of the liquid crystal display panel. In order to effectively irradiate the liquid crystal display panel with light from the light source, some direct type backlight units include a diffusing plate that diffuses light emitted from the light source. A conventional illumination device which is an example of such a direct type backlight unit is disclosed in Patent Document 1 as a planar light source.
　特許文献１に記載された面状光源（照明装置）は上面が開放されて内面に光反射部材が設けられたトレイ状の箱体と、この箱体の四隅に設けられて箱体内に光を照射する半導体発光素子（ＬＥＤ）とを備えた面状光源ユニットを複数個並列させ、これら複数個の面状光源ユニットの表面上に光拡散板を配置している。これにより、半導体発光素子（ＬＥＤ）を用いながら小形でも大形でも自由に輝度の大きい均一な面状光源を提供でき、さらに面状光源を用いた薄型で均一に表示することが可能な低消費電力の電飾看板を提供することとしている。 The planar light source (illumination device) described in Patent Document 1 has a tray-like box with an open upper surface and light reflecting members provided on the inner surface, and light provided in the box at four corners of the box. A plurality of planar light source units each provided with a semiconductor light emitting element (LED) to be irradiated are juxtaposed, and a light diffusing plate is disposed on the surface of the plurality of planar light source units. As a result, it is possible to provide a uniform surface light source having a large brightness freely in both small and large sizes using a semiconductor light emitting device (LED), and a low consumption that enables a thin and uniform display using the surface light source. Electricity signboards will be provided.
特許第４２９０１９６号公報（第４頁－第７頁、第１図）Japanese Patent No. 4290196 (pages 4-7, FIG. 1)
　しかしながら、特許文献１に記載された従来の照明装置では薄型化を図って光源と拡散板との距離を縮めると光源と拡散板との間の空気層が薄くなるので、その空気層における光の散乱が少なくなる可能性が高い。また、光源と拡散板との距離を縮めると光源から拡散板までの光の広がりが小さくなるので、拡散板に対する光源による照射領域が狭くなる可能性が高い。これらの理由により、輝度むらが発生し易くなる虞があるとともに、液晶表示パネルなどの画面端部において光量が不足して暗くなる可能性がある。その結果、照明装置が薄型になるに従って均一に照明することができなくなることが懸念される。 However, in the conventional lighting device described in Patent Document 1, when the distance between the light source and the diffusion plate is reduced by reducing the thickness, the air layer between the light source and the diffusion plate becomes thin. There is a high probability that scattering will be reduced. Further, when the distance between the light source and the diffusion plate is shortened, the spread of light from the light source to the diffusion plate is reduced, so that there is a high possibility that the irradiation area by the light source on the diffusion plate is narrowed. For these reasons, there is a possibility that uneven brightness tends to occur, and there is a possibility that the amount of light is insufficient at the edge of the screen of a liquid crystal display panel or the like, resulting in darkness. As a result, there is a concern that it becomes impossible to uniformly illuminate as the illumination device becomes thinner.
　さらに、特許文献１に記載された従来の照明装置は構造が非常に複雑であり、組み立てが困難であると考えられる。したがって、照明装置の生産性が低下する可能性が高い。 Furthermore, it is considered that the conventional lighting device described in Patent Document 1 has a very complicated structure and is difficult to assemble. Therefore, there is a high possibility that the productivity of the lighting device is reduced.
　本発明は上記の点に鑑みなされたものであり、簡便な構造でありながら、輝度むらがなく均一に照明することが可能な照明装置を提供することを目的とする。また、このような照明装置を備えた表示装置を提供することを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to provide an illuminating device that can illuminate uniformly with no brightness unevenness while having a simple structure. Moreover, it aims at providing the display apparatus provided with such an illuminating device.
　上記の課題を解決するため、本発明の照明装置は、光源を配置した主基板と、前記光源から照射される光を拡散させる拡散板と、を備え、前記拡散板を、前記拡散板の前記光の被照射面が前記主基板の前記光源の配置面と平行をなすように配置し、前記光源を、前記光源の光束の中心軸線が前記主基板の前記配置面に対して傾斜をなすように前記主基板に配置したことを特徴としている。 In order to solve the above problems, an illumination device of the present invention includes a main substrate on which a light source is arranged, and a diffusion plate that diffuses light emitted from the light source, and the diffusion plate is disposed on the diffusion plate. The surface to be irradiated with light is arranged so as to be parallel to the arrangement surface of the light source of the main substrate, and the light source is arranged such that the central axis of the light beam of the light source is inclined with respect to the arrangement surface of the main substrate. It is characterized in that it is arranged on the main substrate.
　この構成によれば、光源の光束の中心軸線が主基板の光源の配置面に対して傾斜をなすので、光源の光が拡散板に到達するまでの距離が光束の中心軸線を傾斜させることなく配置面に対して略垂直となるように光源を主基板に配置した場合より長くなる。 According to this configuration, since the central axis of the light beam of the light source is inclined with respect to the light source arrangement surface of the main substrate, the distance until the light of the light source reaches the diffusion plate does not incline the central axis of the light beam. This is longer than when the light source is arranged on the main substrate so as to be substantially perpendicular to the arrangement surface.
　また、上記構成の照明装置において、前記光源と前記主基板との間に配置され、前記光源の光束の中心軸線が前記主基板の前記配置面に対して傾斜をなすように前記光源を支持する支持部材を備えることを特徴としている。 Further, in the illumination device having the above configuration, the light source is disposed between the light source and the main substrate, and supports the light source so that a central axis of a light beam of the light source is inclined with respect to the arrangement surface of the main substrate. A support member is provided.
　この構成によれば、光束の中心軸線が主基板の配置面に対して傾斜をなすように支持部材に予め設定したうえで、光源を支持部材に支持させて主基板に配置できる。なお、主基板に対する支持部材の固定はネジや粘着シートを利用して固定することにしても良い。 According to this configuration, the light source can be supported on the support member and placed on the main substrate after the support member is set in advance so that the central axis of the light beam is inclined with respect to the placement surface of the main substrate. The support member may be fixed to the main board using screws or an adhesive sheet.
　また、上記構成の照明装置において、前記支持部材が、折り曲げられて前記主基板の前記配置面に対して傾斜をなす斜面部を有する板状部材からなるとともに、前記光源を前記斜面部で支持することを特徴としている。 In the illumination device having the above-described configuration, the support member is a plate-like member having a slope portion that is bent and inclined with respect to the arrangement surface of the main substrate, and supports the light source by the slope portion. It is characterized by that.
　この構成によれば、板状部材という簡便な構造で、光束の中心軸線が主基板の配置面に対して傾斜をなすように光源が主基板に配置される。 According to this configuration, the light source is arranged on the main substrate so that the central axis of the light beam is inclined with respect to the arrangement surface of the main substrate with a simple structure of a plate-like member.
　また、上記構成の照明装置において、前記支持部材が、前記主基板の前記配置面に対して傾斜をなす斜面部を有する倒伏させた三角柱状部材からなるとともに、前記光源を前記斜面部で支持することを特徴としている。 Further, in the illumination device having the above-described configuration, the support member is a fallen triangular columnar member having a slope portion that is inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. It is characterized by that.
　この構成によれば、光源の支持部材が主基板の配置面に対して倒伏させた三角柱状部材からなるので、光束の中心軸線の傾きが安定した状態で光源が支持される。 According to this configuration, since the support member of the light source is formed of the triangular prism member that is inclined with respect to the arrangement surface of the main substrate, the light source is supported in a state where the inclination of the central axis of the light beam is stable.
　また、上記構成の照明装置において、前記支持部材は、前記光源と前記主基板とを電気的に接続する電気配線を備えることを特徴としている。 Further, in the illumination device having the above-described configuration, the support member includes an electrical wiring that electrically connects the light source and the main substrate.
　この構成によれば、光源と主基板とを電気的に接続する電気配線を別途用意する必要がない。 According to this configuration, it is not necessary to separately prepare an electric wiring for electrically connecting the light source and the main board.
　また、上記構成の照明装置において、前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、前記複数の光源から照射される光が同じ方向を向くように、前記複数の光源が配置されていることを特徴としている。 In the illumination device having the above-described configuration, the plurality of light sources includes the plurality of light sources arranged side by side on the arrangement surface of the main substrate, and the light emitted from the plurality of light sources is directed in the same direction. It is characterized by being arranged.
　この構成によれば、光源から照射される光が向く方向の端部側において光量が増加して明るくなるとともに輝度むらの発生が回避される。 According to this configuration, the amount of light increases on the end side in the direction in which the light emitted from the light source is directed to brighten, and uneven brightness is avoided.
　また、上記構成の照明装置において、前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、前記複数の光源から照射される光が前記複数の光源の配置領域内の一辺から外側を向くように、前記複数の光源が配置されていることを特徴としている。 In the illumination device having the above configuration, the light source includes a plurality of the light sources arranged side by side on the arrangement surface of the main substrate, and light emitted from the plurality of light sources is from one side in an arrangement region of the plurality of light sources. The plurality of light sources are arranged so as to face outward.
　この構成によれば、装置外縁部を含む全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。 According to this configuration, the amount of light increases in the entire region including the outer edge portion of the apparatus, thereby brightening and avoiding uneven brightness.
　また、上記構成の照明装置において、前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、前記複数の光源から照射される光が複数の多角形状を描くように、前記複数の光源が配置されていることを特徴としている。 Further, in the illumination device having the above configuration, the plurality of light sources arranged side by side on the arrangement surface of the main substrate, and the plurality of light sources drawn from the plurality of light sources draw a plurality of polygonal shapes. The light source is arranged.
　この構成によれば、全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。 According to this configuration, the amount of light is increased and brightened in the entire area, and uneven brightness is avoided.
　また本発明では、表示装置が上記照明装置を備えることを特徴としている。 Further, the present invention is characterized in that a display device includes the lighting device.
　本発明の構成によれば、光が拡散板に到達するまでの距離が光束の中心軸線を傾斜させることなく配置面に対して略垂直となるように光源を主基板に配置した場合より長くなるので、光源と拡散板との間の空気層における光の散乱が比較的多くなる。さらに、光源から拡散板までの光の広がりも光束の中心軸線が傾斜していない場合と比較して大きくなるので、拡散板に対する光源による照射領域も比較的広くなる。そして、これらの効果は前記従来の照明装置に見られた拡散板における光の拡散を補助するための光反射部材などを設けることなく得ることが可能である。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能な照明装置を提供することができる。また、このような照明装置を備えた輝度むらがなく均一に映像等を表示することが可能な表示装置を提供することができる。 According to the configuration of the present invention, the distance until the light reaches the diffusion plate becomes longer than that in the case where the light source is arranged on the main substrate so as to be substantially perpendicular to the arrangement surface without inclining the central axis of the light beam. Therefore, the light scattering in the air layer between the light source and the diffusion plate is relatively increased. Furthermore, since the spread of light from the light source to the diffusion plate is larger than that in the case where the central axis of the light beam is not inclined, the irradiation area of the light source with respect to the diffusion plate becomes relatively wide. These effects can be obtained without providing a light reflecting member or the like for assisting the diffusion of light in the diffusion plate seen in the conventional lighting device. Therefore, it is possible to provide an illuminating device that can illuminate uniformly without luminance unevenness while having a simple structure. In addition, it is possible to provide a display device including such a lighting device and capable of displaying an image or the like uniformly without uneven luminance.
本発明の第１の実施形態に係るバックライトユニット（照明装置）を備えた液晶表示装置（表示装置）の分解斜視図である。1 is an exploded perspective view of a liquid crystal display device (display device) including a backlight unit (illumination device) according to a first embodiment of the present invention. 第１の実施形態に係るバックライトユニットの発光モジュール及び拡散板の垂直断面図である。It is a vertical sectional view of the light emitting module and the diffusion plate of the backlight unit according to the first embodiment. 第１の実施形態に係るバックライトユニットのＬＥＤ（光源）の傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED (light source) of the backlight unit which concerns on 1st Embodiment. 第１の実施形態に係るバックライトユニットのＬＥＤ近傍を示す垂直断面図である。It is a vertical sectional view showing the vicinity of LEDs of the backlight unit according to the first embodiment. 本発明の第２の実施形態に係るバックライトユニットのＬＥＤ近傍を示す垂直断面図である。It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a second embodiment of the present invention. 本発明の第３の実施形態に係るバックライトユニットのＬＥＤ近傍を示す垂直断面図である。It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a third embodiment of the present invention. 本発明の第４の実施形態に係るバックライトユニットのＬＥＤ近傍を示す垂直断面図である。It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a fourth embodiment of the present invention. 本発明の第５の実施形態に係るバックライトユニットのＬＥＤ近傍を示す垂直断面図である。It is a vertical sectional view showing the vicinity of LEDs of a backlight unit according to a fifth embodiment of the present invention. 本発明の第６の実施形態に係るバックライトユニットのＬＥＤの傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED of the backlight unit which concerns on the 6th Embodiment of this invention. 本発明の第７の実施形態に係るバックライトユニットのＬＥＤの傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED of the backlight unit which concerns on the 7th Embodiment of this invention. 本発明の第８の実施形態に係るバックライトユニットのＬＥＤの傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED of the backlight unit which concerns on the 8th Embodiment of this invention. 本発明の第９の実施形態に係るバックライトユニットのＬＥＤの傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED of the backlight unit which concerns on the 9th Embodiment of this invention. 本発明の第１０の実施形態に係るバックライトユニットのＬＥＤの傾斜方向を示す平面図である。It is a top view which shows the inclination direction of LED of the backlight unit which concerns on the 10th Embodiment of this invention.
　以下、本発明の実施形態を図１～図１３に基づき説明する。なおここでは、本発明の照明装置の一例としてのバックライトユニットを備えた本発明の表示装置の一例として液晶表示装置を掲げて説明するものとする。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, a liquid crystal display device will be described as an example of the display device of the present invention provided with a backlight unit as an example of the illumination device of the present invention.
　最初に、本発明の第１の実施形態に係るバックライトユニットを備えた液晶表示装置について、図１を用いてその構造を説明する。図１は第１の実施形態に係るバックライトユニットを備えた液晶表示装置の分解斜視図である。 First, the structure of the liquid crystal display device including the backlight unit according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an exploded perspective view of a liquid crystal display device including a backlight unit according to the first embodiment.
　液晶表示装置１は映像の表示に液晶を用いた表示装置であって、左右方向に長く延びる平面視略矩形（長方形状）をなしている。液晶表示装置１は、図１に示すように液晶表示パネル１０と、バックライトユニット２０とを備えている。 The liquid crystal display device 1 is a display device using liquid crystal for displaying images, and has a substantially rectangular shape (rectangular shape) in a plan view extending long in the left-right direction. The liquid crystal display device 1 includes a liquid crystal display panel 10 and a backlight unit 20 as shown in FIG.
　液晶表示パネル１０はアクティブマトリクス基板１１、対向基板１２及び偏光シート１３を備えている。対向基板１２はカラーフィルタ基板と呼ばれることもある。 The liquid crystal display panel 10 includes an active matrix substrate 11, a counter substrate 12, and a polarizing sheet 13. The counter substrate 12 may be called a color filter substrate.
　アクティブマトリクス基板１１はその所定面上に図示しないＴＦＴ（Ｔｈｉｎ　Ｆｉｌｍ　Ｔｒａｎｓｉｓｔｏｒ：薄膜トランジスタ）からなるスイッチング素子と画素電極とを備えるとともに、さらにそれらに電気的に接続されるゲート線（走査線）とソース線（データ線）とを備えている。対向基板１２はその所定面上に図示しない共通電極と必要に応じてカラーフィルタとを備えている。アクティブマトリクス基板１１及び対向基板１２は各々の所定面が液晶を特定方向に配向させることが可能な図示しない配向膜によって覆われている。 The active matrix substrate 11 includes a switching element and a pixel electrode made of TFT (Thin Film Transistor) (not shown) on a predetermined surface thereof, and further, a gate line (scanning line) and a source line electrically connected to the switching element. (Data line). The counter substrate 12 includes a common electrode (not shown) on the predetermined surface and, if necessary, a color filter. Each of the active matrix substrate 11 and the counter substrate 12 is covered with an alignment film (not shown) capable of aligning liquid crystals in a specific direction.
　そして、アクティブマトリクス基板１１及び対向基板１２は互いの所定面が向き合うように図示しないシール材を介して貼り合わせられている。さらに、アクティブマトリクス基板１１と対向基板１２との間に液晶が封入されている。これにより、アクティブマトリクス基板１１の画素電極と対向基板１２の共通電極との間に液晶が挟持された状態になっている。 Then, the active matrix substrate 11 and the counter substrate 12 are bonded to each other through a sealing material (not shown) so that their predetermined surfaces face each other. Further, liquid crystal is sealed between the active matrix substrate 11 and the counter substrate 12. Thereby, the liquid crystal is sandwiched between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12.
　偏光シート１３はアクティブマトリクス基板１１及び対向基板１２の液晶を封入した互いの所定面と反対側の面各々に貼付されている。偏光シート１３は特定の振動方向の光波だけを透過させるシートであって、２枚の偏光シート１３の透過軸方向を互いに約９０°ずらした状態で各々貼付されている。 The polarizing sheet 13 is affixed to each of the surfaces opposite to the predetermined surfaces of the active matrix substrate 11 and the counter substrate 12 enclosing the liquid crystal. The polarizing sheet 13 is a sheet that transmits only a light wave in a specific vibration direction, and is attached in a state where the transmission axis directions of the two polarizing sheets 13 are shifted from each other by about 90 °.
　このような構成の液晶表示パネル１０は映像信号に基づきアクティブマトリクス基板１１の画素電極と対向基板１２の共通電極との間に発生させた電界により液晶の配向を調整し、液晶を透過する光の透過率を変更する。 The liquid crystal display panel 10 having such a configuration adjusts the orientation of the liquid crystal by an electric field generated between the pixel electrode of the active matrix substrate 11 and the common electrode of the counter substrate 12 based on the video signal, and transmits light transmitted through the liquid crystal. Change the transmittance.
　バックライトユニット２０は照明方式として直下型を採用した照明装置であって、バックライトシャーシ２１、発光モジュール３０、拡散板２２、プリズムシート２３及びレンズシート２４を備えている。 The backlight unit 20 is a lighting device adopting a direct type as an illumination system, and includes a backlight chassis 21, a light emitting module 30, a diffusion plate 22, a prism sheet 23, and a lens sheet 24.
　バックライトシャーシ２１は液晶表示パネル１０側を開口した平面視略矩形をなす箱型に形成されている。バックライトシャーシ２１はその内部、すなわち内底面２１ａ側に発光モジュール３０を収容する。 The backlight chassis 21 is formed in a box shape having a substantially rectangular shape in plan view with an opening on the liquid crystal display panel 10 side. The backlight chassis 21 accommodates the light emitting module 30 inside thereof, that is, on the inner bottom surface 21a side.
　発光モジュール３０はバックライト光の生成するための光を照射するモジュールであって、バックライトシャーシ２１の内部に収容されて液晶表示パネル１０の下方に配置されている。発光モジュール３０は平面視略矩形をなす板状の主基板３１と、光源としての複数のＬＥＤ３２とを備えている。 The light emitting module 30 is a module that emits light for generating backlight light, and is housed inside the backlight chassis 21 and disposed below the liquid crystal display panel 10. The light emitting module 30 includes a plate-like main substrate 31 having a substantially rectangular shape in plan view, and a plurality of LEDs 32 as light sources.
　ＬＥＤ３２は例えば白色に発光する白色ＬＥＤ（発光ダイオード）で構成され、複数のＬＥＤ３２が主基板３１の配置面３１ａ全域に略格子状の列をなす形に並べて配置されている。本実施形態では、例えば６４個のＬＥＤ３２が主基板３１の配置面３１ａに配置されている。複数のＬＥＤ３２各々の間隔は、例えば５ｍｍ～３０ｍｍに設定されている。なお、光源はＬＥＤに限定されるわけではなく、ＬＥＤ自体も白色発光するものに限定されるわけでない。また、ＬＥＤ３２の数や配置方法も上記や図１の形に限定されるわけではない。 The LEDs 32 are formed of white LEDs (light emitting diodes) that emit white light, for example, and a plurality of LEDs 32 are arranged in a substantially grid-like array over the entire arrangement surface 31 a of the main substrate 31. In the present embodiment, for example, 64 LEDs 32 are arranged on the arrangement surface 31 a of the main substrate 31. The interval between each of the plurality of LEDs 32 is set to 5 mm to 30 mm, for example. The light source is not limited to the LED, and the LED itself is not limited to one that emits white light. Further, the number and arrangement method of the LEDs 32 are not limited to the above and the shape shown in FIG.
　拡散板２２、プリズムシート２３及びレンズシート２４はバックライトシャーシ２１の開口を塞ぐように配置され、発光モジュール３０を液晶表示パネル１０側から覆っている。 The diffuser plate 22, the prism sheet 23, and the lens sheet 24 are arranged so as to close the opening of the backlight chassis 21, and cover the light emitting module 30 from the liquid crystal display panel 10 side.
　これらの板状及びシート状の部材群のうち拡散板２２は発光モジュール３０に最も近接して配置され、発光モジュール３０から照射される光を直接受ける。拡散板２２は発光モジュール３０から照射される光の被照射面が主基板３１のＬＥＤ３２の配置面３１ａと平行をなすように配置されている（図２参照）。ＬＥＤ３２から拡散板２２までの距離は、例えば５ｍｍ～２０ｍｍに設定されている。拡散板２２はＬＥＤ３２から照射される光を拡散させ、液晶表示パネル１０の全域に光を行き渡らせる。 Among these plate-like and sheet-like member groups, the diffusion plate 22 is disposed closest to the light emitting module 30 and directly receives light emitted from the light emitting module 30. The diffusing plate 22 is arranged such that the surface to be irradiated with light emitted from the light emitting module 30 is parallel to the arrangement surface 31a of the LEDs 32 of the main substrate 31 (see FIG. 2). The distance from the LED 32 to the diffusion plate 22 is set to 5 mm to 20 mm, for example. The diffusion plate 22 diffuses the light emitted from the LED 32 and spreads the light over the entire area of the liquid crystal display panel 10.
　プリズムシート２３は拡散板２２の液晶表示パネル１０側に重ねて設けられている。プリズムシート２３は一方向に線状に延びる例えば三角プリズムがシート面内にて一方向に交差する方向に並べられている。プリズムシート２３は拡散板２２からの光の放射特性を偏向させる。 The prism sheet 23 is provided so as to overlap the liquid crystal display panel 10 side of the diffusion plate 22. In the prism sheet 23, for example, triangular prisms extending linearly in one direction are arranged in a direction intersecting in one direction within the sheet surface. The prism sheet 23 deflects the radiation characteristic of light from the diffusion plate 22.
　レンズシート２４はプリズムシート２３の液晶表示パネル１０側に重ねて設けられている。レンズシート２４は光を屈折散乱させる微粒子が内部に分散されている。レンズシート２４はプリズムシート２３からの局所的に集光させることなく光量むらとなる明暗差を抑制する。 The lens sheet 24 is provided so as to overlap the prism sheet 23 on the liquid crystal display panel 10 side. In the lens sheet 24, fine particles that refract and scatter light are dispersed inside. The lens sheet 24 suppresses the difference in brightness that causes unevenness in the amount of light without locally condensing from the prism sheet 23.
　このような構成のバックライトユニット２０はむらのない均一なバックライト光を面状に照射して液晶表示パネル１０の裏面を照明する。液晶表示パネル１０が映像信号に基づき液晶を透過するバックライト光の透過率を変更するので、液晶表示パネル１０の表示画面に所望の映像が表示される。 The backlight unit 20 having such a configuration illuminates the back surface of the liquid crystal display panel 10 by irradiating a uniform and uniform backlight light in a planar shape. Since the liquid crystal display panel 10 changes the transmittance of the backlight that transmits the liquid crystal based on the video signal, a desired video is displayed on the display screen of the liquid crystal display panel 10.
　続いて、発光モジュール３０の詳細な構成について、図１に加えて図２～図４を用いて説明する。図２は発光モジュール３０及び拡散板２２の垂直断面図、図３は光源であるＬＥＤ３２の傾斜方向を示す平面図、図４はＬＥＤ３２近傍を示す垂直断面図である。 Subsequently, a detailed configuration of the light emitting module 30 will be described with reference to FIGS. 2 to 4 in addition to FIG. 2 is a vertical sectional view of the light emitting module 30 and the diffusion plate 22, FIG. 3 is a plan view showing the inclination direction of the LED 32 as a light source, and FIG. 4 is a vertical sectional view showing the vicinity of the LED 32.
　主基板３１の配置面３１ａに並べて配置された複数のＬＥＤ３２は、図２に示すようにＬＥＤ３２から照射される光が同じ方向を向くように、配置面３１ａに対して傾けて設けられている。なお、図３に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。本例では図３において左右方向に長く延びる平面視略矩形をなす主基板３１に対して、すべてのＬＥＤ３２から照射される光が図３において上方を向くようにＬＥＤ３２が配置されている。 The plurality of LEDs 32 arranged side by side on the arrangement surface 31a of the main substrate 31 are provided to be inclined with respect to the arrangement surface 31a so that the light emitted from the LEDs 32 faces in the same direction as shown in FIG. In addition, the arrow drawn in FIG. 3 has shown the direction where the light irradiated from LED32 faces. In this example, the LEDs 32 are arranged so that the light emitted from all the LEDs 32 faces upward in FIG. 3 with respect to the main substrate 31 having a substantially rectangular shape in plan view extending long in the left-right direction in FIG.
　個々のＬＥＤ３２に関して、図４に示すようにＬＥＤ３２は板状のＬＥＤ基板３３に実装され、このＬＥＤ基板３３が主基板３１に取り付けられている。主基板３１及びＬＥＤ基板３３にはともに電気的に接続された図示しない電気配線が設けられ、この電気配線がＬＥＤ３２に接続されて発光のための電力を供給している。 Regarding each LED 32, as shown in FIG. 4, the LED 32 is mounted on a plate-like LED substrate 33, and the LED substrate 33 is attached to the main substrate 31. Both the main board 31 and the LED board 33 are provided with electrical wiring (not shown) that is electrically connected. The electrical wiring is connected to the LED 32 to supply power for light emission.
　そして、ＬＥＤ３２がＬＥＤ基板３３表面に対して傾斜をなす形で実装され、ＬＥＤ基板３３が主基板３１の配置面３１ａに密着する形で取り付けられている。これにより、ＬＥＤ３２はＬＥＤ３２の光束Ｍ（図２網掛け部）の中心軸線Ｌが主基板３１の配置面３１ａに対して角度θで傾斜をなすようにＬＥＤ基板３３を介して主基板３１に配置されている。ＬＥＤ３２の光束Ｍの中心軸線Ｌの配置面３１ａに対する傾斜角θは、例えば３０°～９０°の間で任意に設定することができる。なお、ＬＥＤ３２はＬＥＤ基板３３を介さず直接主基板３１に実装して配置しても良い。 Then, the LED 32 is mounted so as to be inclined with respect to the surface of the LED substrate 33, and the LED substrate 33 is attached in close contact with the arrangement surface 31 a of the main substrate 31. Thereby, the LED 32 is arranged on the main board 31 via the LED board 33 so that the central axis L of the light flux M (shaded part in FIG. 2) of the LED 32 is inclined with respect to the arrangement surface 31a of the main board 31 at an angle θ. Has been. The inclination angle θ of the central axis L of the light flux M of the LED 32 with respect to the arrangement surface 31a can be arbitrarily set between 30 ° and 90 °, for example. Note that the LEDs 32 may be directly mounted on the main board 31 without using the LED board 33.
　このようにＬＥＤ３２の光束Ｍの中心軸線Ｌが主基板３１のＬＥＤ３２の配置面３１ａに対して傾斜をなすので、光が拡散板２２に到達するまでの距離が光束Ｍの中心軸線Ｌを傾斜させることなく配置面３１ａに対して略垂直となるようにＬＥＤ３２を主基板に配置した場合より長くなる。また、複数のＬＥＤ３２から照射される光が同じ方向を向くように各々のＬＥＤ３２が配置されているので、ＬＥＤ３２から照射される光が向く方向の端部側、例えば図３では上側において光量が増加して明るくなるとともに輝度むらの発生が回避される。 Thus, since the central axis L of the light beam M of the LED 32 is inclined with respect to the arrangement surface 31a of the LED 32 of the main substrate 31, the distance until the light reaches the diffusion plate 22 causes the central axis L of the light beam M to be inclined. It becomes longer than the case where LED32 is arrange | positioned on a main board | substrate so that it may become substantially perpendicular | vertical with respect to the arrangement | positioning surface 31a. Further, since each LED 32 is arranged so that light emitted from the plurality of LEDs 32 faces in the same direction, the amount of light increases on the end side in the direction in which the light emitted from the LED 32 faces, for example, on the upper side in FIG. As a result, it becomes brighter and the occurrence of uneven brightness is avoided.
　本発明の上記実施形態の構成によれば、光が拡散板２２に到達するまでの距離が光束Ｍの中心軸線Ｌを傾斜させることなく配置面３１ａに対して略垂直となるようにＬＥＤ３２を主基板３１に配置した場合より長くなるので、ＬＥＤ３２と拡散板２２との間の空気層における光の散乱が比較的多くなる。さらに、ＬＥＤ３２から拡散板２２までの光の広がりも光束Ｍの中心軸線Ｌが傾斜していない場合と比較して大きくなるので、拡散板２２に対するＬＥＤ３２による照射領域も比較的広くなる。そして、これらの効果は従来の照明装置に見られた拡散板２２における光の拡散を補助するための光反射部材などを設けることなく得ることが可能である。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能な照明装置であるバックライトユニット２０を提供することができる。また、このようなバックライトユニット２０を備えた輝度むらがなく均一に映像等を表示することが可能な表示装置である液晶表示パネル１０を提供することができる。 According to the configuration of the above embodiment of the present invention, the LED 32 is mainly arranged so that the distance until the light reaches the diffusion plate 22 is substantially perpendicular to the arrangement surface 31a without inclining the central axis L of the light beam M. Since it becomes longer than the case where it arrange | positions on the board | substrate 31, the scattering of the light in the air layer between LED32 and the diffusion plate 22 becomes comparatively much. Furthermore, since the spread of light from the LED 32 to the diffusion plate 22 is also larger than when the central axis L of the light beam M is not inclined, the irradiation area of the LED 32 on the diffusion plate 22 is also relatively wide. These effects can be obtained without providing a light reflecting member or the like for assisting the diffusion of light in the diffusion plate 22 seen in the conventional lighting device. Therefore, it is possible to provide the backlight unit 20 that is a lighting device that has a simple structure and can be illuminated uniformly without luminance unevenness. Further, it is possible to provide the liquid crystal display panel 10, which is a display device provided with such a backlight unit 20 and capable of displaying images and the like uniformly without luminance unevenness.
　次に、本発明の第２の実施形態に係る表示装置であるバックライトユニット２０について、図５を用いて説明する。図５は第２の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２近傍を示す垂直断面図である。なお、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a vertical sectional view showing the vicinity of the LED 32 which is a light source of the backlight unit 20 according to the second embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第２の実施形態に係るバックライトユニット２０は、図５に示すようにＬＥＤ３２が板状のＬＥＤ基板３３表面に密着する形で実装され、ＬＥＤ基板３３が主基板３１の配置面３１ａに対して傾斜をなす形で取り付けられている。これにより、ＬＥＤ３２はＬＥＤ３２の光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して角度θで傾斜をなすようにＬＥＤ基板３３を介して主基板３１に配置されている。 As shown in FIG. 5, the backlight unit 20 according to the second embodiment is mounted such that the LEDs 32 are in close contact with the surface of the plate-like LED substrate 33, and the LED substrate 33 is disposed with respect to the arrangement surface 31 a of the main substrate 31. It is mounted in an inclined shape. Thereby, the LED 32 is arranged on the main substrate 31 via the LED substrate 33 so that the central axis L of the light flux M of the LED 32 is inclined at an angle θ with respect to the arrangement surface 31 a of the main substrate 31.
　この第２の実施形態の構成によれば、第１の実施形態同様、光が拡散板２２に到達するまでの距離が光束Ｍの中心軸線Ｌを傾斜させることなく配置面３１ａに対して略垂直となるようにＬＥＤ３２を主基板３１に配置した場合より長くなるので、ＬＥＤ３２と拡散板２２との間の空気層における光の散乱が比較的多くなる。さらに、ＬＥＤ３２から拡散板２２までの光の広がりも光束Ｍの中心軸線Ｌが傾斜していない場合と比較して大きくなるので、拡散板２２に対するＬＥＤ３２による照射領域も比較的広くなる。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the second embodiment, as in the first embodiment, the distance until the light reaches the diffusion plate 22 is substantially perpendicular to the arrangement surface 31a without inclining the central axis L of the light beam M. Therefore, the scattering of light in the air layer between the LED 32 and the diffusion plate 22 is relatively increased. Furthermore, since the spread of light from the LED 32 to the diffusion plate 22 is also larger than when the central axis L of the light beam M is not inclined, the irradiation area of the LED 32 on the diffusion plate 22 is also relatively wide. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　また、ＬＥＤ３２が板状のＬＥＤ基板３３表面に密着する形で実装され、ＬＥＤ基板３３が主基板３１の配置面３１ａに対して傾斜をなす形で取り付けられているので、主基板３１に対するＬＥＤ３２及びＬＥＤ基板３３の取り付け状態を比較的安定させることが可能である。 Further, the LED 32 is mounted in close contact with the surface of the plate-shaped LED substrate 33, and the LED substrate 33 is attached in a form inclined with respect to the arrangement surface 31a of the main substrate 31, so that the LEDs 32 and the It is possible to make the attachment state of the LED substrate 33 relatively stable.
　次に、本発明の第３の実施形態に係る表示装置であるバックライトユニット２０について、図６を用いて説明する。図６は第３の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２近傍を示す垂直断面図である。なお、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the third embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第３の実施形態に係るバックライトユニット２０は、図６に示すように主基板３１とＬＥＤ基板３３との間に支持部材３４が配置されている。支持部材３４は主基板３１の配置面３１ａに沿って延び、側面から見て鋭角をなすように折り曲げられた板状部材からなる。 In the backlight unit 20 according to the third embodiment, a support member 34 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 34 is formed of a plate-like member that extends along the arrangement surface 31 a of the main substrate 31 and is bent so as to form an acute angle when viewed from the side surface.
　支持部材３４は主基板３１の配置面３１ａに対して取り付けられる取り付け部３４ａと、折り曲げ部３４ｂと、折り曲げ部３４ｂで折り曲げられて主基板３１の配置面３１ａに対して傾斜をなす斜面部３４ｃとを有している。そして、支持部材３４が斜面部３４ｃでＬＥＤ基板３３を介してＬＥＤ３２を支持するので、ＬＥＤ３２はＬＥＤ３２の光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して角度θで傾斜をなすように主基板３１に配置されている。 The support member 34 is attached to the arrangement surface 31a of the main substrate 31; a bent portion 34b; and a slope portion 34c that is bent by the bent portion 34b and is inclined with respect to the arrangement surface 31a of the main substrate 31. have. Since the support member 34 supports the LED 32 via the LED substrate 33 at the inclined portion 34c, the LED 32 is inclined such that the central axis L of the light flux M of the LED 32 is inclined with respect to the arrangement surface 31a of the main substrate 31 at an angle θ. Are arranged on the main substrate 31.
　また、主基板３１に対する支持部材３４の固定はネジ３５を利用して固定されている。なおこのとき、支持部材３４に備えられた電気配線３４ｄと主基板３１の配置面３１ａに備えられた電気配線３１ｂとが電気的に接続されるよう支持部材３４が主基板３１に固定される。これにより、ＬＥＤ基板３３を介してＬＥＤ３２と主基板３１とが電気的に接続され、発光のための電力がＬＥＤ３２に供給される。 Further, the support member 34 is fixed to the main board 31 using screws 35. At this time, the support member 34 is fixed to the main board 31 so that the electric wiring 34d provided on the support member 34 and the electric wiring 31b provided on the arrangement surface 31a of the main board 31 are electrically connected. Thereby, the LED 32 and the main board 31 are electrically connected via the LED board 33, and power for light emission is supplied to the LED 32.
　この第３の実施形態の構成によれば、板状部材という簡便な構造で、光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して傾斜をなすようにＬＥＤ３２が主基板３１に配置される。したがって、第１及び第２の実施形態同様、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the third embodiment, the LEDs 32 are arranged on the main board 31 so that the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main board 31 with a simple structure of a plate-like member. Is done. Therefore, as in the first and second embodiments, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　また、支持部材３４はＬＥＤ３２と主基板３１とを電気的に接続する電気配線３４ｄを備えるのでプリント基板の役割も果たし、別途電気配線を用意する必要がないので、バックライトユニット２０の生産性の向上や低コスト化を図ることが可能である。さらに、支持部材３４を利用してＬＥＤ基板３３の熱を放熱させる作用も期待できるので、発熱に起因するＬＥＤ３２の発光効率の低下や不具合の発生などを抑制することが可能である。 Further, since the support member 34 is provided with the electric wiring 34d for electrically connecting the LED 32 and the main board 31, it also serves as a printed circuit board, and it is not necessary to prepare a separate electric wiring, so that the productivity of the backlight unit 20 can be improved. Improvement and cost reduction can be achieved. Furthermore, since the effect | action which thermally radiates the heat | fever of the LED board 33 using the supporting member 34 can also be anticipated, it is possible to suppress the fall of the luminous efficiency of LED32 resulting from heat_generation | fever, generation | occurrence | production of a malfunction, etc.
　次に、本発明の第４の実施形態に係る表示装置であるバックライトユニット２０について、図７を用いて説明する。図７は第４の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２近傍を示す垂直断面図である。なお、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a vertical sectional view showing the vicinity of the LED 32 that is a light source of the backlight unit 20 according to the fourth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第４の実施形態に係るバックライトユニット２０は、図７に示すように主基板３１とＬＥＤ基板３３との間に支持部材３４が配置されている。支持部材３４は主基板３１の配置面３１ａに沿って延び、側面からみて鈍角をなすように折り曲げられた板状部材からなる。支持部材３４が斜面部３４ｃでＬＥＤ基板３３を介してＬＥＤ３２を支持するので、ＬＥＤ３２はＬＥＤ３２の光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して角度θで傾斜をなすように主基板３１に配置されている。 In the backlight unit 20 according to the fourth embodiment, a support member 34 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 34 is formed of a plate-like member that extends along the arrangement surface 31a of the main substrate 31 and is bent so as to form an obtuse angle when viewed from the side surface. Since the support member 34 supports the LED 32 via the LED substrate 33 at the inclined portion 34 c, the LED 32 is principally arranged such that the central axis L of the light flux M of the LED 32 is inclined at an angle θ with respect to the arrangement surface 31 a of the main substrate 31. Arranged on the substrate 31.
　この第４の実施形態の構成によれば、第３の実施形態同様、板状部材という簡便な構造で、光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して傾斜をなすようにＬＥＤ３２が主基板３１に配置される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the fourth embodiment, as in the third embodiment, the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main substrate 31 with a simple structure of a plate-like member. The LED 32 is disposed on the main board 31. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　次に、本発明の第５の実施形態に係る表示装置であるバックライトユニット２０について、図８を用いて説明する。図８は第５の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２近傍を示す垂直断面図である。なお、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a vertical sectional view showing the vicinity of the LED 32 that is the light source of the backlight unit 20 according to the fifth embodiment. Since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are used for the same constituent elements as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第５の実施形態に係るバックライトユニット２０は、図８に示すように主基板３１とＬＥＤ基板３３との間に支持部材３６が配置されている。支持部材３６は主基板３１の配置面３１ａに沿って延びる倒伏させた三角柱状部材からなる。 In the backlight unit 20 according to the fifth embodiment, a support member 36 is disposed between the main board 31 and the LED board 33 as shown in FIG. The support member 36 is formed of a triangular prism member that extends along the arrangement surface 31 a of the main substrate 31.
　支持部材３６は主基板３１の配置面３１ａに対して傾斜をなす斜面部３６ａを有している。そして、支持部材３６が斜面部３６ａでＬＥＤ基板３３を介してＬＥＤ３２を支持するので、ＬＥＤ３２はＬＥＤ３２の光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して角度θで傾斜をなすように主基板３１に配置されている。 The support member 36 has an inclined surface portion 36 a that is inclined with respect to the arrangement surface 31 a of the main substrate 31. Since the support member 36 supports the LED 32 via the LED substrate 33 at the inclined portion 36a, the LED 32 is inclined such that the central axis L of the light flux M of the LED 32 is inclined at an angle θ with respect to the arrangement surface 31a of the main substrate 31. Are arranged on the main substrate 31.
　なお、主基板３１に対する支持部材３６の固定は粘着シート３７を利用して固定されている。 Note that the support member 36 is fixed to the main board 31 using an adhesive sheet 37.
　この第５の実施形態の構成によれば、第１～第４の実施形態同様、簡便な構造で、光束Ｍの中心軸線Ｌが主基板３１の配置面３１ａに対して傾斜をなすようにＬＥＤ３２が主基板３１に配置される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the fifth embodiment, as in the first to fourth embodiments, the LED 32 has a simple structure and the central axis L of the light beam M is inclined with respect to the arrangement surface 31a of the main substrate 31. Is disposed on the main board 31. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　また、ＬＥＤ３２の支持部材３６が主基板３１の配置面３１ａに対して倒伏させた三角柱状部材からなるので、光束Ｍの中心軸線の傾きが安定した状態でＬＥＤ３２が支持される。これにより、バックライトユニット２０の輝度むらがなく均一に照明するという効果を一層向上させることが可能である。 Further, since the support member 36 of the LED 32 is formed of a triangular prism member that is inclined with respect to the arrangement surface 31a of the main substrate 31, the LED 32 is supported in a state where the inclination of the central axis of the light beam M is stable. Thereby, it is possible to further improve the effect of uniformly illuminating the backlight unit 20 without uneven brightness.
　次に、本発明の第６の実施形態に係る表示装置であるバックライトユニット２０について、図９を用いて説明する。図９は第６の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２の傾斜方向を示す平面図である。なお、図９は図３と同様、主基板３１に配置した複数のＬＥＤ３２を示す図面であって、主基板３１の描画を省略している。また、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the sixth embodiment. 9 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第６の実施形態に係るバックライトユニット２０は、図９に示すように左右方向に長く延びる平面視略矩形をなす主基板３１（図９では図示せず、図３参照）に対して、すべてのＬＥＤ３２から照射される光が右方を向くようにＬＥＤ３２が配置されている。なお、図９に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。 As shown in FIG. 9, the backlight unit 20 according to the sixth embodiment is all over the main board 31 (not shown in FIG. 9, see FIG. 3) having a substantially rectangular shape in plan view extending long in the left-right direction. The LED 32 is arranged so that the light emitted from the LED 32 faces rightward. In addition, the arrow drawn in FIG. 9 has shown the direction where the light irradiated from LED32 faces.
　この第６の実施形態の構成によれば、第１の実施形態同様、複数のＬＥＤ３２から照射される光が同じ方向を向くように各々のＬＥＤ３２が配置されているので、ＬＥＤ３２から照射される光が向く方向の端部側、例えば図９では右側において光量が増加して明るくなるとともに輝度むらの発生が回避される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the sixth embodiment, as in the first embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces in the same direction. For example, the right side in FIG. 9 increases the amount of light on the end side in the direction in which the light is directed, thereby brightening the image and avoiding uneven brightness. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　なお、ＬＥＤ３２から照射される光が向く方向は第１の実施形態の図３における上方や第６の実施形態の図９における右方に限定されるわけではなく、図３や図９のように主基板３１を平面視してその下方や左方にＬＥＤ３２を向けても構わない。さらに、主基板３１を平面視してその斜め方向にＬＥＤ３２を向けても構わない。また前述のように、ＬＥＤ３２の光束Ｍの中心軸線Ｌの配置面３１ａに対する傾斜角θは、例えば３０°～９０°の間で任意に設定することができる。 The direction in which the light emitted from the LED 32 faces is not limited to the upper side in FIG. 3 of the first embodiment or the right side in FIG. 9 of the sixth embodiment, as shown in FIGS. The LED 32 may be directed downward or to the left when the main board 31 is viewed in plan. Further, the LED 32 may be directed in an oblique direction when the main substrate 31 is viewed in plan. Further, as described above, the inclination angle θ of the central axis L of the light flux M of the LED 32 with respect to the arrangement surface 31a can be arbitrarily set between 30 ° and 90 °, for example.
　次に、本発明の第７の実施形態に係る表示装置であるバックライトユニット２０について、図１０を用いて説明する。図１０は第７の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２の傾斜方向を示す平面図である。なお、図１０は図３と同様、主基板３１に配置した複数のＬＥＤ３２を示す図面であって、主基板３１の描画を省略している。また、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a seventh embodiment of the present invention will be described with reference to FIG. FIG. 10 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the seventh embodiment. 10 is a drawing showing a plurality of LEDs 32 arranged on the main board 31, as in FIG. 3, and drawing of the main board 31 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第７の実施形態に係るバックライトユニット２０は、図１０に示すように複数のＬＥＤ３２から照射される光が複数のＬＥＤ３２の配置領域内の二点鎖線で描画した一辺Ｘ１から外側を向くように、複数のＬＥＤ３２が配置されている。なお、図１０に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。複数のＬＥＤ３２の配置領域内の一辺Ｘ１は図１０において上下方向中央部に左右方向に延びて配置されているので、一辺Ｘ１より上側のＬＥＤ３２は上方に向かって、一辺Ｘ１より下側のＬＥＤ３２は下方に向かって光を照射するよう傾斜している。 In the backlight unit 20 according to the seventh embodiment, as shown in FIG. 10, the light emitted from the plurality of LEDs 32 faces outward from the one side X <b> 1 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32. A plurality of LEDs 32 are arranged. In addition, the arrow drawn in FIG. 10 has shown the direction where the light irradiated from LED32 faces. Since one side X1 in the arrangement region of the plurality of LEDs 32 extends in the left-right direction at the center in the vertical direction in FIG. 10, the LED 32 above the one side X1 is directed upward, and the LED 32 below the one side X1 is It is inclined to irradiate light downward.
　そして、図１０の矢印の長さは個々のＬＥＤ３２から照射される光が拡散板２２に到達するまでの距離の割合を示している。これは、ＬＥＤ３２の光束Ｍの中心軸線Ｌの配置面３１ａに対する傾斜角θ（例えば図４参照）の大きさに関連し、傾斜角θが比較的大きいと光が拡散板２２に到達するまでの距離が比較的短く（図１０の矢印が比較的短い）、傾斜角θが比較的小さいと光が拡散板２２に到達するまでの距離が比較的長い（図１０の矢印が比較的長い）。図１０ではＬＥＤ３２の配置領域内の一辺Ｘ１から上方及び下方に離れるに従って傾斜角θが小さくなるようにＬＥＤ３２が主基板３１に配置されている。 The length of the arrow in FIG. 10 indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22. This is related to the magnitude of the inclination angle θ (see, for example, FIG. 4) with respect to the arrangement surface 31 a of the central axis L of the light flux M of the LED 32, and when the inclination angle θ is relatively large, the light reaches the diffusion plate 22. When the distance is relatively short (the arrow in FIG. 10 is relatively short) and the inclination angle θ is relatively small, the distance until the light reaches the diffusion plate 22 is relatively long (the arrow in FIG. 10 is relatively long). In FIG. 10, the LEDs 32 are arranged on the main board 31 so that the inclination angle θ decreases as the distance from the one side X <b> 1 in the LED 32 arrangement region increases upward and downward.
　この第７の実施形態の構成によれば、複数のＬＥＤ３２から照射される光が複数のＬＥＤ３２の配置領域内の一辺Ｘ１から外側を向くように各々のＬＥＤ３２が配置されているので、装置外縁部を含む全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the seventh embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 faces outward from the one side X1 in the arrangement region of the plurality of LEDs 32. In the entire area including, the amount of light increases and the brightness is increased, and the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　次に、本発明の第８の実施形態に係る表示装置であるバックライトユニット２０について、図１１を用いて説明する。図１１は第８の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２の傾斜方向を示す平面図である。なお、図１１は図３と同様、主基板３１に配置した複数のＬＥＤ３２を示す図面であって、主基板３１の描画を省略している。また、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the eighth embodiment. 11 is a drawing showing a plurality of LEDs 32 arranged on the main board 31, as in FIG. 3, and drawing of the main board 31 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第８の実施形態に係るバックライトユニット２０は、図１１に示すように複数のＬＥＤ３２から照射される光が複数のＬＥＤ３２の配置領域内の二点鎖線で描画した一辺Ｘ２から外側を向くように、複数のＬＥＤ３２が配置されている。なお、図１１に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。複数のＬＥＤ３２の配置領域内の一辺Ｘ２は図１１において左右方向中央部に上下方向に延びて配置されているので、一辺Ｘ２より右側のＬＥＤ３２は右方に向かって、一辺Ｘ２より左側のＬＥＤ３２は左方に向かって光を照射するよう傾斜している。 In the backlight unit 20 according to the eighth embodiment, as shown in FIG. 11, the light emitted from the plurality of LEDs 32 faces outward from the one side X <b> 2 drawn by a two-dot chain line in the arrangement region of the plurality of LEDs 32. A plurality of LEDs 32 are arranged. In addition, the arrow drawn in FIG. 11 has shown the direction where the light irradiated from LED32 faces. Since one side X2 in the arrangement region of the plurality of LEDs 32 extends in the vertical direction at the center in the left-right direction in FIG. 11, the LED 32 on the right side of the one side X2 faces rightward, and the LED 32 on the left side of the one side X2 It is inclined to irradiate light toward the left.
　そして、矢印の長さは個々のＬＥＤ３２から照射される光が拡散板２２に到達するまでの距離の割合を示している。図１１ではＬＥＤ３２の配置領域内の一辺Ｘ２から右方及び左方に離れるに従って傾斜角θが小さくなるようにＬＥＤ３２が主基板３１に配置されている。 The length of the arrow indicates the ratio of the distance until the light emitted from each LED 32 reaches the diffusion plate 22. In FIG. 11, the LEDs 32 are arranged on the main board 31 so that the inclination angle θ decreases as the distance from the one side X <b> 2 in the LED 32 arrangement region increases to the right and left.
　この第８の実施形態の構成によれば、第７の実施形態同様、複数のＬＥＤ３２から照射される光が複数のＬＥＤ３２の配置領域内の一辺Ｘ２から外側を向くように各々のＬＥＤ３２が配置されているので、装置外縁部を含む全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the eighth embodiment, as in the seventh embodiment, each LED 32 is arranged so that light emitted from the plurality of LEDs 32 faces outward from one side X2 in the arrangement region of the plurality of LEDs 32. As a result, the amount of light increases in the entire area including the outer edge of the apparatus to increase the brightness and avoid the occurrence of uneven brightness. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　なお、ＬＥＤ３２から照射される光が向く方向は第７の実施形態の図１０における上下方向や第８の実施形態の図１１における左右方向に限定されるわけではなく、図１０や図１１においてその斜め方向にＬＥＤ３２を向けても構わない。また、複数のＬＥＤ３２の配置領域内の一辺Ｘ１及びＸ２の配置は各々上下方向中央部、左右方向中央部に限定されるわけではなく、上下方向または左右方向に偏在させても構わない。 The direction in which the light emitted from the LED 32 faces is not limited to the vertical direction in FIG. 10 of the seventh embodiment or the horizontal direction in FIG. 11 of the eighth embodiment. The LED 32 may be directed obliquely. Further, the arrangement of the sides X1 and X2 in the arrangement area of the plurality of LEDs 32 is not limited to the vertical center and the horizontal center, but may be unevenly distributed in the vertical direction or the horizontal direction.
　次に、本発明の第９の実施形態に係る表示装置であるバックライトユニット２０について、図１２を用いて説明する。図１２は第９の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２の傾斜方向を示す平面図である。なお、図１２は図３と同様、主基板３１に配置した複数のＬＥＤ３２を示す図面であって、主基板３１の描画を省略している。また、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a ninth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the ninth embodiment. 12 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第９の実施形態に係るバックライトユニット２０は、図１２に示すように複数のＬＥＤ３２から照射される光が複数の四角形状を描くように、複数のＬＥＤ３２が配置されている。なお、図１２に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。図１２において破線の四角形で囲んだ４個のＬＥＤ３２から照射される光が各々時計方向に上方、右方、下方及び左方を向いて回転するように四角形を描く、または光が各々反時計方向に上方、左方、下方及び右方を向いて回転するように四角形を描いている。 In the backlight unit 20 according to the ninth embodiment, a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes as shown in FIG. In addition, the arrow drawn in FIG. 12 has shown the direction where the light irradiated from LED32 faces. In FIG. 12, the light emitted from the four LEDs 32 surrounded by the broken-line quadrangle is drawn in a quadrangle so that the light rotates clockwise, upward, rightward, downward, and leftward, or the light is counterclockwise. A quadrilateral is drawn to rotate upward, leftward, downward, and rightward.
　この第９の実施形態の構成によれば、複数のＬＥＤ３２から照射される光が複数の四角形状を描くように各々のＬＥＤ３２が配置されているので、全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the ninth embodiment, each LED 32 is arranged so that the light emitted from the plurality of LEDs 32 draws a plurality of quadrangular shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　次に、本発明の第１０の実施形態に係る表示装置であるバックライトユニット２０について、図１３を用いて説明する。図１３は第１０の実施形態に係るバックライトユニット２０の光源であるＬＥＤ３２の傾斜方向を示す平面図である。なお、図１３は図３と同様、主基板３１に配置した複数のＬＥＤ３２を示す図面であって、主基板３１の描画を省略している。また、この実施形態の基本的な構成は図１～図４を用いて説明した前記第１の実施形態と同じであるので、第１の実施形態と共通する構成要素には前と同じ符号を付し、図面の記載及びその説明を省略するものとする。 Next, a backlight unit 20 that is a display device according to a tenth embodiment of the present invention will be described with reference to FIG. FIG. 13 is a plan view showing an inclination direction of the LED 32 that is a light source of the backlight unit 20 according to the tenth embodiment. FIG. 13 is a drawing showing a plurality of LEDs 32 arranged on the main board 31 as in FIG. 3, and drawing of the main board 31 is omitted. In addition, since the basic configuration of this embodiment is the same as that of the first embodiment described with reference to FIGS. 1 to 4, the same reference numerals are assigned to the same components as those of the first embodiment. The description of the drawings and the description thereof will be omitted.
　第１０の実施形態に係るバックライトユニット２０は、図１３に示すように複数のＬＥＤ３２から照射される光が複数の八角形状を描くように、複数のＬＥＤ３２が配置されている。なお、図１３に描画した矢印はＬＥＤ３２から照射される光が向く方向を示している。図１３において二重の破線の八角形に挟まれた網掛けで描画した８個のＬＥＤ３２から照射される光が各々時計方向に上方、斜め上右方、右方、斜め下右方、下方、斜め下左方、左方及び斜め上左方を向いて回転するように八角形を描く、または光が各々反時計方向に上方、斜め上左方、左方、斜め下左方、下方、斜め下右方、右方及び斜め上右方を向いて回転するように八角形を描いている。 In the backlight unit 20 according to the tenth embodiment, a plurality of LEDs 32 are arranged so that light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes as shown in FIG. In addition, the arrow drawn in FIG. 13 has shown the direction where the light irradiated from LED32 faces. In FIG. 13, the light emitted from the eight LEDs 32 drawn by the hatching sandwiched between double broken octagons is clockwise, diagonally upper right, right, diagonally lower right, downward, Draw an octagon to rotate diagonally down left, left and diagonally up left, or light counterclockwise up, diagonal up left, left, diagonal down left, down, diagonal An octagon is drawn to rotate toward the lower right, the right and the diagonally upper right.
　この第１０の実施形態の構成によれば、複数のＬＥＤ３２から照射される光が複数の八角形状を描くように各々のＬＥＤ３２が配置されているので、全体的な領域において光量が増加して明るくなるとともに輝度むらの発生が回避される。したがって、簡便な構造でありながら、輝度むらがなく均一に照明することが可能なバックライトユニット２０を提供することができる。 According to the configuration of the tenth embodiment, each LED 32 is arranged so that light emitted from the plurality of LEDs 32 draws a plurality of octagonal shapes. And the occurrence of uneven brightness is avoided. Therefore, it is possible to provide the backlight unit 20 that has a simple structure and can be illuminated uniformly without luminance unevenness.
　なお、ＬＥＤ３２から照射される光が描く多角形は第９の実施形態の図１２における四角形や第１０の実施形態の図１３における八角形に限定されるわけではなく、六角形やその他の多角形であっても良い。 The polygon drawn by the light emitted from the LED 32 is not limited to the quadrangle in FIG. 12 of the ninth embodiment and the octagon in FIG. 13 of the tenth embodiment, but a hexagon or other polygons. It may be.
　以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。 The embodiment of the present invention has been described above, but the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention.
　本発明は、被照射体に向かって光を照射する照明装置において利用可能である。 The present invention can be used in an illumination device that irradiates light toward an irradiated object.
　　　１　　液晶表示装置（表示装置）
　　　１０　　液晶パネル
　　　２０　　バックライトユニット（照明装置）
　　　２２　　拡散板
　　　３０　　発光モジュール
　　　３１　　主基板
　　　３１ａ　　配置面
　　　３２　　ＬＥＤ（光源）
　　　３３　　ＬＥＤ基板
　　　３４　　支持部材
　　　３４ａ　　取り付け部
　　　３４ｂ　　折り曲げ部
　　　３４ｃ　　斜面部
　　　３４ｄ　　電気配線
　　　３５　　ネジ
　　　３６　　支持部材
　　　３７　　粘着シート
　　　Ｍ　　光束
　　　Ｌ　　（光束の）中心軸線 1 Liquid crystal display device (display device)
10 Liquid crystal panel 20 Backlight unit (lighting device)
22 Diffusion plate 30 Light emitting module 31 Main substrate 31a Arrangement surface 32 LED (light source)
33 LED board 34 Support member 34a Mounting part 34b Bending part 34c Slope part 34d Electrical wiring 35 Screw 36 Support member 37 Adhesive sheet M Light flux L (light flux) central axis

Claims (9)

  1. 　光源を配置した主基板と、
    　前記光源から照射される光を拡散させる拡散板と、を備え、
    　前記拡散板を、前記拡散板の前記光の被照射面が前記主基板の前記光源の配置面と平行をなすように配置し、
    　前記光源を、前記光源の光束の中心軸線が前記主基板の前記配置面に対して傾斜をなすように前記主基板に配置したことを特徴とする照明装置。     A main board on which a light source is arranged;
    A diffusion plate for diffusing the light emitted from the light source,
    The diffuser plate is disposed such that the light irradiated surface of the diffuser plate is parallel to the light source placement surface of the main substrate,
    The lighting device, wherein the light source is arranged on the main substrate so that a central axis of a light beam of the light source is inclined with respect to the arrangement surface of the main substrate.
  2. 　前記光源と前記主基板との間に配置され、前記光源の光束の中心軸線が前記主基板の前記配置面に対して傾斜をなすように前記光源を支持する支持部材を備えることを特徴とする請求項１に記載の照明装置。 A support member is provided between the light source and the main substrate, and supports the light source so that a central axis of a light beam of the light source is inclined with respect to the arrangement surface of the main substrate. The lighting device according to claim 1.
  3. 　前記支持部材が、折り曲げられて前記主基板の前記配置面に対して傾斜をなす斜面部を有する板状部材からなるとともに、前記光源を前記斜面部で支持することを特徴とする請求項２に記載の照明装置。 3. The support member according to claim 2, wherein the support member is formed of a plate-like member having a slope portion that is bent and inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. The lighting device described.
  4. 　前記支持部材が、前記主基板の前記配置面に対して傾斜をなす斜面部を有する倒伏させた三角柱状部材からなるとともに、前記光源を前記斜面部で支持することを特徴とする請求項２に記載の照明装置。 3. The support member according to claim 2, wherein the support member includes a sloped triangular prism-like member having a slope portion that is inclined with respect to the arrangement surface of the main substrate, and the light source is supported by the slope portion. The lighting device described.
  5. 　前記支持部材は、前記光源と前記主基板とを電気的に接続する電気配線を備えることを特徴とする請求項２～請求項４のいずれか１項に記載の照明装置。 The lighting device according to any one of claims 2 to 4, wherein the support member includes an electrical wiring that electrically connects the light source and the main substrate.
  6. 　前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、
    　前記複数の光源から照射される光が同じ方向を向くように、前記複数の光源が配置されていることを特徴とする請求項１～請求項４のいずれか１項に記載の照明装置。     With a plurality of the light sources arranged side by side on the arrangement surface of the main substrate,
    The lighting device according to any one of claims 1 to 4, wherein the plurality of light sources are arranged so that light emitted from the plurality of light sources is directed in the same direction.
  7. 　前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、
    　前記複数の光源から照射される光が前記複数の光源の配置領域内の一辺から外側を向くように、前記複数の光源が配置されていることを特徴とする請求項１～請求項４のいずれか１項に記載の照明装置。     With a plurality of the light sources arranged side by side on the arrangement surface of the main substrate,
    The plurality of light sources are arranged such that light emitted from the plurality of light sources faces outward from one side in the arrangement region of the plurality of light sources. The lighting device according to claim 1.
  8. 　前記主基板の前記配置面に並べて配置された複数の前記光源を備えるとともに、
    　前記複数の光源から照射される光が複数の多角形状を描くように、前記複数の光源が配置されていることを特徴とする請求項１～請求項４のいずれか１項に記載の照明装置。     With a plurality of the light sources arranged side by side on the arrangement surface of the main substrate,
    The lighting device according to any one of claims 1 to 4, wherein the plurality of light sources are arranged so that light emitted from the plurality of light sources draws a plurality of polygonal shapes. .
  9. 　請求項１～請求項４のいずれか１項に記載の照明装置を備えたことを特徴とする表示装置。 A display device comprising the illumination device according to any one of claims 1 to 4.
PCT/JP2011/074612 2010-11-02 2011-10-26 Illumination device and display device WO2012060255A1 (en)

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CN109471302A (en) * 2018-12-25 2019-03-15 中航华东光电有限公司 A kind of bottom back lighting device with visual angle deflection
CN109945103A (en) * 2019-04-01 2019-06-28 深圳市瑞丰光电子股份有限公司 A kind of LED light source component and backlight assembly
CN110690241A (en) * 2019-09-20 2020-01-14 深圳市华星光电半导体显示技术有限公司 Display device manufacturing method and display device
US20230400732A1 (en) * 2021-03-01 2023-12-14 Beijing Boe Display Technology Co., Ltd. Light emitting module and display module

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JP2007265646A (en) * 2006-03-27 2007-10-11 Mitsubishi Electric Corp Luminaire
JP2010055876A (en) * 2008-08-27 2010-03-11 Sharp Corp Illumination device and display device

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JP2007134224A (en) * 2005-11-11 2007-05-31 Showa Denko Kk Plane light source device and display device
JP2007265646A (en) * 2006-03-27 2007-10-11 Mitsubishi Electric Corp Luminaire
JP2010055876A (en) * 2008-08-27 2010-03-11 Sharp Corp Illumination device and display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109471302A (en) * 2018-12-25 2019-03-15 中航华东光电有限公司 A kind of bottom back lighting device with visual angle deflection
CN109945103A (en) * 2019-04-01 2019-06-28 深圳市瑞丰光电子股份有限公司 A kind of LED light source component and backlight assembly
CN110690241A (en) * 2019-09-20 2020-01-14 深圳市华星光电半导体显示技术有限公司 Display device manufacturing method and display device
US20230400732A1 (en) * 2021-03-01 2023-12-14 Beijing Boe Display Technology Co., Ltd. Light emitting module and display module

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