WO2017126034A1 - Dispositif de source de lumière et appareil d'affichage - Google Patents

Dispositif de source de lumière et appareil d'affichage Download PDF

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Publication number
WO2017126034A1
WO2017126034A1 PCT/JP2016/051448 JP2016051448W WO2017126034A1 WO 2017126034 A1 WO2017126034 A1 WO 2017126034A1 JP 2016051448 W JP2016051448 W JP 2016051448W WO 2017126034 A1 WO2017126034 A1 WO 2017126034A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
source device
support member
guide plate
light
Prior art date
Application number
PCT/JP2016/051448
Other languages
English (en)
Japanese (ja)
Inventor
佳威 中村
Original Assignee
堺ディスプレイプロダクト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 堺ディスプレイプロダクト株式会社 filed Critical 堺ディスプレイプロダクト株式会社
Priority to PCT/JP2016/051448 priority Critical patent/WO2017126034A1/fr
Publication of WO2017126034A1 publication Critical patent/WO2017126034A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction

Definitions

  • the present invention relates to, for example, a light source device used as a backlight for irradiating light to a liquid crystal panel (display panel), and a display device including the light source device.
  • a display device including a liquid crystal panel as an image display unit includes a backlight device (light source device) on the back side of the liquid crystal panel, and modulates and transmits light emitted from the light source device by the liquid crystal panel. It is configured to display an image.
  • Backlight devices are roughly classified into direct type and edge light type, but in recent years, edge light type backlight devices are widely used from the viewpoint of reducing power consumption and thinning.
  • the edge-light type backlight device includes a light guide plate and a light source housed in a shallow box-type backlight chassis that is open on one side.
  • the light guide plate is a translucent resin plate and is placed on the bottom plate of the backlight chassis.
  • the light source is opposed to one side edge of the light guide plate.
  • the peripheral edge of the light guide plate is covered over an appropriate width by a frame body fitted from the open side to the edge of the backlight chassis. The light travels while diffusing inside the optical plate, and is distributed and emitted over the entire surface of the light guide plate exposed inside the frame.
  • a support member that supports a plate-like light source is disposed on a side plate of a backlight chassis, and an extending portion that extends from one edge of the support member to the outside of the side plate is provided.
  • the support member is fixed by being sandwiched between one edge of the side plate and the back surface of the frame.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a light source device and a display device that prevent positional deviation of the light source.
  • a light source device is a light guide plate and a rod-like body, and is fixed to a hollow support member in which an opening along the longitudinal direction is fitted to an edge of the light guide plate, and an inner wall of the support member. And a light source.
  • a display device includes the light source device described above and a display panel disposed to face the light guide plate of the light source device, and emits light from the light guide plate on the back surface of the display panel. Irradiated and configured to display an image in front of the display panel.
  • the present invention it is possible to prevent the positional deviation of the light source in the light source device and the display device.
  • FIG. 1 is a perspective view schematically showing the appearance of a display device according to Embodiment 1.
  • FIG. FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is a perspective view which shows a supporting member.
  • 6 is a cross-sectional view of a display device according to Embodiment 2.
  • FIG. 10 is a cross-sectional view of a display device according to Embodiment 3.
  • FIG. 6 is a transverse cross-sectional view of a display device according to Embodiment 4.
  • FIG. 1 is a perspective view schematically showing the appearance of the display device according to the first embodiment.
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG.
  • the illustrated display device includes a liquid crystal panel (display panel) 1 for image display having a rectangular plate shape, and a backlight (light source device) 2 for irradiating the liquid crystal panel 1 with light.
  • FIG. 1 shows only the image display surface of the liquid crystal panel 1 exposed in the frame of the front cabinet 10.
  • the back side of the liquid crystal panel 1 is covered with a backlight chassis (housing) 20 that constitutes the outer casing of the backlight 2.
  • the display device further includes a stand 13, which is supported on an appropriate mounting surface via the stand 13, and is used while maintaining the image display surface of the liquid crystal panel 1 in a vertical position as shown in FIG. .
  • the backlight 2 includes a backlight chassis 20, a light source 21, a light guide plate 22, and a support member 23.
  • the backlight chassis 20 is formed into a shallow box with one side open.
  • the optical sheet 11 is placed on the first surface of the light guide plate 22 (the surface facing the liquid crystal panel 1).
  • the second surface (surface opposite to the first surface) of the light guide plate 22 is covered with a reflection sheet 24 having light reflectivity.
  • the light guide plate 22 is a translucent resin plate and has a rectangular shape smaller than the backlight chassis 20.
  • the light guide plate 22 is disposed opposite to the bottom plate of the backlight chassis 20 by the support member 23.
  • One short side or both short sides, or one long side or both long sides of the light guide plate 22 are assembled to a support member 23 that supports the light source 21.
  • the light guide plate 22 has one short side edge assembled to the support member 23.
  • FIG. 3 is a perspective view showing the support member 23.
  • the support member 23 is a rod-shaped body having a U-shaped cross section, and has an opening 234 along the longitudinal direction on one side.
  • the support member 23 includes a bottom portion 231, and side wall portions 232 and 233 extending in a direction orthogonal to the bottom portion 231 at both edges of the bottom portion 231.
  • the opening 234 includes an edge 2321 (first edge) on the side far from the bottom 231 in the side wall 232 (first side wall) and a side far from the bottom 231 in the side wall 233 (second side wall). It is formed by the edge 2331 (second edge).
  • the inner wall of the support member 23, that is, the inner walls (inner surfaces) of the bottom 231 and the side walls 232 and 233 are flat, and all or a part thereof has light reflectivity.
  • the light source 21 includes an elongated rectangular substrate 210 and a plurality of (only three are shown in FIG. 3) light emitting units 211 arranged in parallel along the longitudinal direction on the substrate 210.
  • the light emitting unit 211 is provided with an emitting unit 212 on the opposite side of the surface to be attached to the substrate 210.
  • the light emitting unit 211 is configured by a resin-molded LED (Light Emitting Diode).
  • the emission unit 212 is made of a transparent resin or the like, and the light emitting unit 211 emits light from the emission unit 212.
  • the light source 21 is assembled to the support member 23 by fixing the bottom surface of the substrate 210 to the inner wall of the bottom portion 231 with, for example, screws or double-sided tape.
  • the length A of the short side of the substrate 210 is configured to coincide with the opposing width B of the side wall portions 232 and 233, and the light source 21 is inserted into the substrate 210 by fitting the substrate 210 between the side wall portions 232 and 233. It may be positioned in the surface direction.
  • the short side length A of the substrate 210 may be shorter than the opposing width B of the side walls 232 and 233.
  • the light source 21 may be a light source other than an LED, such as CCFL (Cold Cathode Fluorescent Lamp).
  • One side edge of the light guide plate 22 is opposed to the emitting portion 212 with a predetermined interval, and the one side edge portion of the light guide plate 22 is fitted into the opening 234 of the support member 23. Both end surfaces of the light guide plate 22 in the longitudinal direction are fixed to the side plates of the backlight chassis 20.
  • the light emitted from the light source 21 is reflected by the inner wall of the side wall 232 or 233 and is incident on one side edge of the light guide plate 22.
  • Light incident from one side edge of the light guide plate 22 is emitted from the first surface of the light guide plate 22.
  • a display device is configured by placing the optical sheet 11 on the light guide plate 22 in the backlight 2 configured as described above, and sandwiching the liquid crystal panel 1 between the front cabinet 10 and the support member 23.
  • both end surfaces of the light guide plate 22 in the longitudinal direction are fixed to the side plates of the backlight chassis 20, but both ends of the support member 23 in the longitudinal direction may be fixed to the side plates of the backlight chassis 20.
  • these fixation is performed using a screw or a double-sided tape, for example.
  • the light source 21 is fixed to the inner wall of the bottom portion 231, and the light guide plate 22 is fitted to the support member 23. That is, the light guide plate 22 and the light source 21 are integrally fixed via the support member 23.
  • the positional relationship between the light guide plate 22 and the light source 21 is kept constant. 21 can be prevented from being displaced with respect to the light guide plate 22.
  • FIG. 4 is a cross-sectional view of the display device according to the second embodiment.
  • the configuration and operation other than those specifically described are the same as those of the first embodiment, and the description is omitted for the sake of brevity.
  • the bottom surface of the substrate 210 is fixed to the inner wall of the side wall portion 233 while one side surface of the substrate 210 is in contact with the inner wall of the bottom portion 231.
  • the light emitting unit 211 is a side view type LED provided such that the emitting unit 212 faces the opening 234 of the support member 23, and emits light in parallel with the substrate 210.
  • the light source 21 is inserted between the side wall portion 232 and the side wall portion 233 with one long side of the substrate 210 facing the inner wall of the bottom portion 231, and the substrate 210 is fixed to the inner wall of the side wall portion 233.
  • the bottom surface of the substrate 210 is fixed to the inner wall of the side wall portion 233, but the bottom surface of the substrate 210 may be fixed to the inner wall of the side wall portion 232.
  • the light guide plate 22 and the light source 21 are integrally fixed via the support member 23, so that the positional deviation of the light source 21 with respect to the light guide plate 22 can be prevented. .
  • FIG. 5 is a cross-sectional view of the display device according to the third embodiment.
  • the display device according to Embodiment 3 is configured such that the distance between the two side wall portions 232 and 233 is larger than the distance between the two edge portions 2321 and 2331.
  • the edge 2321 has a protruding portion 235 (first protruding portion) that protrudes toward the side wall portion 233.
  • the edge portion 2331 has a protruding portion 236 (second protruding portion) that protrudes toward the side wall portion 232.
  • the opening 234 is formed by the two protruding portions 235 and 236, and the distance between the two edge portions 2321 and 2331 is the distance between the two protruding portions 235 and 236.
  • the light guide plate 22 is fixed to the support member 23 by sandwiching one side edge portion thereof by the projecting portions 235 and 236.
  • the following effects can be obtained. That is, since the internal space of the support member 23 is larger than that of the first embodiment, the light emitted from the light source 21 is mixed well in the support member 23 and then enters the light guide plate 22. Therefore, the amount of light incident on the light guide plate 22 becomes uniform, and unevenness of the light emitted from the light guide plate 22 can be suppressed.
  • FIG. 6 is a cross-sectional view of the display device according to the fourth embodiment.
  • the cross-sectional shape of the support member 23 is an L shape having an opening 234 at one end.
  • the support member 23 includes a recess 237 in which the bottom 231 side of the side wall 232 is recessed in the front direction (the liquid crystal panel 1 side).
  • the concave portion 237 is opposed to the side wall portion 233 and includes a bottom portion (end portion) 238 having one end portion connected to the bottom portion 231, and a connecting portion 239 connecting the other end portion of the bottom portion 238 and the side wall portion 232.
  • the substrate 210 is fixed to the inner wall of the bottom 238 with, for example, screws or double-sided tape.
  • the length of the short side of the substrate 210 is configured to coincide with the opposing width of the connecting portion 239 and the bottom portion 231, and the light source 21 is mounted on the substrate 210 by fitting the substrate 210 between the connecting portion 239 and the bottom portion 231. It may be positioned in the surface direction of 210. Note that the length of the short side of the substrate 210 may be shorter than the opposing width of the connecting portion 239 and the bottom portion 231.
  • the light emitting unit 211 is provided so that the emitting unit 212 faces the side wall 233.
  • the following effects can be obtained. That is, since the internal space of the support member 23 is larger than that of the first embodiment, the light emitted from the light source 21 is mixed well in the support member 23 and then enters the light guide plate 22. Therefore, the amount of light incident on the light guide plate 22 becomes uniform, and unevenness of the light emitted from the light guide plate 22 can be suppressed.
  • the recessed part 237 may be provided in the side wall part 233 side.
  • the inner wall of the support member 23 (the inner wall of the bottom portion 231 and the side wall portions 232 and 233) is flat. It may have a shape, for example, a curved shape.
  • the side walls 232 and / or 233 move from the edge 2321 and / or 2331 on the opening 234 side and the edge on the bottom 231 side toward the center. It may have a curved shape that gradually protrudes to the outside of the support member 23.
  • the side wall portions 232 and / or 233 have such a curved shape, the maximum value of the distance between the two side wall portions 232 and 233 becomes larger than the distance between the two edge portions 2321 and 2331, and the support member 23.
  • the space inside can be made larger. Therefore, the same effect as in the third and fourth embodiments can be obtained.
  • Liquid crystal panel display panel
  • Light source device backlight
  • 21 light source 210 substrate
  • light emitting part 22
  • light guide plate 23 support member 231 bottom part
  • side wall part first side wall part
  • second side wall 2321

Abstract

L'invention concerne un dispositif de source de lumière qui évite le défaut d'alignement d'une source de lumière, et un appareil d'affichage comportant le dispositif de source de lumière. Ce dispositif de source de lumière comporte: une plaque de guide de lumière ; un organe de support creux qui est un corps en forme de tige et dont une ouverture dans la direction longitudinale est ajustée à la partie d'arête de la plaque de guide de lumière ; et une source de lumière fixée à la paroi intérieure de l'organe de support. Cet appareil d'affichage comporte : le dispositif de source de lumière ; et un panneau d'affichage agencé vis-à-vis de la plaque de guide de lumière du dispositif de source de lumière, et est conçu de sorte que la lumière émise par la plaque de guide de lumière est appliquée à la surface arrière du panneau d'affichage, et qu'une image est affichée sur la surface avant du panneau d'affichage.
PCT/JP2016/051448 2016-01-19 2016-01-19 Dispositif de source de lumière et appareil d'affichage WO2017126034A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/051448 WO2017126034A1 (fr) 2016-01-19 2016-01-19 Dispositif de source de lumière et appareil d'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/051448 WO2017126034A1 (fr) 2016-01-19 2016-01-19 Dispositif de source de lumière et appareil d'affichage

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WO2017126034A1 true WO2017126034A1 (fr) 2017-07-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113302552A (zh) * 2018-11-14 2021-08-24 堺显示器制品株式会社 背光源装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0467626U (fr) * 1990-10-25 1992-06-16
JP2001084823A (ja) * 1999-09-10 2001-03-30 Enplas Corp 面光源装置及び該面光源装置を備えた画像表示装置
JP2012237827A (ja) * 2011-05-10 2012-12-06 Funai Electric Co Ltd 液晶モジュール
JP2015109141A (ja) * 2013-12-03 2015-06-11 住友化学株式会社 両面発光装置用モジュール及び両面発光装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0467626U (fr) * 1990-10-25 1992-06-16
JP2001084823A (ja) * 1999-09-10 2001-03-30 Enplas Corp 面光源装置及び該面光源装置を備えた画像表示装置
JP2012237827A (ja) * 2011-05-10 2012-12-06 Funai Electric Co Ltd 液晶モジュール
JP2015109141A (ja) * 2013-12-03 2015-06-11 住友化学株式会社 両面発光装置用モジュール及び両面発光装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113302552A (zh) * 2018-11-14 2021-08-24 堺显示器制品株式会社 背光源装置

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