WO2013065534A1 - Dispositif d'éclairage, rétro-éclairage, et dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'éclairage, rétro-éclairage, et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2013065534A1
WO2013065534A1 PCT/JP2012/077403 JP2012077403W WO2013065534A1 WO 2013065534 A1 WO2013065534 A1 WO 2013065534A1 JP 2012077403 W JP2012077403 W JP 2012077403W WO 2013065534 A1 WO2013065534 A1 WO 2013065534A1
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WO
WIPO (PCT)
Prior art keywords
substrate
light
hole
housing
positioning boss
Prior art date
Application number
PCT/JP2012/077403
Other languages
English (en)
Japanese (ja)
Inventor
敬治 清水
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to JP2013541718A priority Critical patent/JP5665155B2/ja
Publication of WO2013065534A1 publication Critical patent/WO2013065534A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array

Definitions

  • the present invention relates to an illumination device using an LED as a light source, a backlight using the illumination device, and a liquid crystal display device.
  • LEDs light emitting diodes
  • the LED has many advantages such as small size, long life, low power consumption due to high luminous efficiency, and no use of mercury, compared to fluorescent lamps (cold cathode tubes, etc.) that have been used conventionally. Yes.
  • the lighting device is, for example, attached to the ceiling of a living room and used as indoor lighting, or disposed on the back of a liquid crystal display device and used as a backlight. Since the LED is a point light source, a luminance distribution is formed in the light emitted from the light emitting surface, and uneven luminance tends to occur. Therefore, in order to suppress luminance unevenness caused by the fact that the LED is a point light source, a reflecting member is disposed on the surface facing the light emitting surface, and the light emitting surface and / or the surface of the reflecting member is aligned. An illuminating device in which LEDs are arranged to emit light in a direction has been proposed.
  • the luminous flux density on the light emitting surface changes depending on the distance from the LED.
  • the luminous flux density changes in this way, the light emitted from the light exit surface is visually recognized as light with uneven brightness.
  • the luminous flux on the light exit surface can be made uniform or substantially uniform by narrowing the irradiation angle of the light emitted from the LED, and a method of attaching a collimator lens to the LED is proposed. (See, for example, JP 2009-205968 A).
  • FIG. 11 is a view showing a mounting state of a substrate and a collimator lens used in a conventional lighting device.
  • the board 932 on which the LED 933 is mounted is screwed and fixed to the chassis 91 of the lighting device with the first screw Sc1.
  • the collimator lens 95 is fixed to the chassis 91 with a second screw Sc2 so as to face the front of the LED 933.
  • the second screw Sc ⁇ b> 2 that fixes the collimator lens 95 passes through the through hole formed in the substrate 932.
  • the substrate 932 on which the LED 933 is mounted and the collimator lens 95 are firmly fixed to the chassis 91 with screws.
  • the first screw Sc1 and the second screw Sc2 are necessary, and the number of constituent members increases. Moreover, since there are many screwing points, the labor of manufacture increases correspondingly, production efficiency falls, and manufacturing cost becomes high.
  • the substrate 932 is fixed to the chassis 91 with the first screw Sc1, and the collimator lens 95 is fixed to the chassis 91 with the second screw Sc2. For this reason, the substrate 932 and the collimator lens) 5 are fixed to the chassis 91 with high positional accuracy. However, the substrate 932 and the collimator lens 95 are not directly fixed, and if the accuracy of the chassis 91 is low, the relative position between the substrate 932 and the collimator lens 95 may deviate from the plan. If the relative position between the substrate 932 and the collimator lens 95 is shifted, the light emitted from the LED 933 may not be accurately irradiated onto the collimator lens 95, which may cause uneven brightness of the light emitted from the illumination device.
  • the chassis 91 may be inclined with respect to the horizontal depending on the shape of the lighting device.
  • a temporary fixing member for temporarily fixing the substrate 932 and the collimator lens 95 to the chassis 91 is necessary for screwing, which causes an increase in manufacturing steps and an increase in members required for manufacturing. And may increase costs.
  • the present invention can accurately position the light source and the collimator lens, and can easily fix the light source and the collimator lens to the casing, and the backlight device or the liquid crystal display using such an illumination device.
  • An object is to provide an apparatus.
  • the present invention is configured so that a housing having a reflective portion facing a light emitting surface, a substrate on which LEDs are arrayed and mounted, and a surface of the substrate on which the LEDs are mounted are opposed.
  • a light collecting member disposed, and the light collecting member includes two positioning bosses protruding from a facing surface facing the substrate, and a snap fit protruding from a position away from the positioning boss.
  • the substrate has a cylindrical first through hole having an inner diameter equal to the outer diameter of the positioning boss, and a long through hole shaped second through hole extending along a line connected to the first through hole.
  • said condensing member is light from the LED to provide a lighting device attached to the housing along the reflective portion.
  • the substrate and the light collecting member are combined in a state where the substrate and the light collecting member are positioned relatively accurately in advance, the substrate and the light collecting member can be attached to the housing by a simple method such as a boss and a snap fit. Compared to the case where and are attached separately, the assembly work is reduced. In addition, since the screws for temporarily fixing the substrate and other members can be eliminated, the number of components can be reduced accordingly. In addition, since the boss is used to accurately position the substrate and the condensing member, and the condensing member and the housing, it is difficult to waste light emitted from the LED, and the luminance unevenness is stable and the luminance is high. It is possible to emit light.
  • the positioning boss is formed with a length that does not come out of the through hole of the housing when the substrate is rotated around the snap fit so as to be separated from the housing.
  • the substrate and the light collecting member can be accurately positioned without separately preparing screws and other temporary fixing members. Therefore, it can be applied to specially shaped housings.
  • the light condensing member and the substrate may be fixed to the casing by screwing together.
  • the substrate may be fixed to the housing by an adhesive means.
  • the bonding means include a double-sided tape and an adhesive.
  • the substrate on which the LED is mounted and the light collecting member are attached to the outer surface side of the attachment portion formed in a polygonal cylindrical shape disposed in the central portion of the housing. It may be.
  • the housing includes a rectangular flat plate portion, and the substrate and the light collecting member are attached to a wall body protruding from at least one side of the flat plate portion. May be.
  • Such an illuminating device can be used as a back light of a light emitting signboard or the like, or a backlight of a back light type image display device such as a liquid crystal display device.
  • the light source and the light collecting member can be accurately positioned, and the light source and the light collecting member can be easily fixed to the housing, and the back using such an illumination device.
  • a light or liquid crystal display device can be provided.
  • FIG. 5 is a cross-sectional view taken along the line VV of the mounting angle shown in FIG. 4. It is the figure which expanded the board
  • FIG. 1 is an exploded perspective view of a lighting device according to the present invention.
  • a lighting device A shown in FIG. 1 is a ceiling light attached to a ceiling surface, and an upper portion in the drawing is attached to the ceiling surface.
  • the vertical direction in the state of FIG. 1 will be described as a reference except when otherwise described, and the vertical direction in the state of FIG. (Vertical direction) or the thickness direction and lateral direction of the lighting device may be described as the H direction (horizontal direction).
  • the lighting device A includes a chassis 1, a drive control unit 2, a light emitting unit 3, and a cover 4, which are arranged in this order from the top.
  • the chassis 1 is a casing attached to the ceiling surface, and is a disk-shaped member made of aluminum.
  • a power connector (not shown) that is provided on the ceiling surface and supplies power passes through the central portion of the chassis 1.
  • a surface opposite to the surface facing the ceiling surface of the chassis 1 is formed as a reflecting surface (reflecting portion) that efficiently reflects the light emitted from the light emitting portion 3 and is subjected to surface treatment.
  • this surface treatment for example, a method of attaching a highly reflective sheet such as foamed PET or a white paint may be applied.
  • the drive control unit 2 includes circuits such as a power supply circuit that supplies power to the light emitting unit 3 and a control circuit that performs lighting control.
  • a control circuit that performs lighting control.
  • the drive control unit 2 is attached to the chassis 1, the insulating sheet 20 for suppressing leakage to the chassis 1, a circuit board 21 on which a power supply circuit, a control circuit, and the like are mounted, and a support unit that supports the circuit board 21 22 and 23.
  • the drive control unit 2 also includes a circuit that is electrically connected to a power connector (not shown) provided on the ceiling surface and converts the supplied power into power corresponding to the light emitting unit 3.
  • the light emitting unit 3 is fixed to the chassis 1 with screws, and the drive control unit 2 is fixed to the light emitting unit 3 with screws.
  • the cover 4 is attached so as to surround the side of the chassis 1 where the drive control unit 2 and the light emitting unit 3 are attached.
  • the cover 4 is fixed by engaging the outer peripheral portion with the chassis 1 and screwing the central portion to the light emitting unit 3.
  • the cover 4 is a light exit surface from which light emitted from the light emitting unit 3 is emitted, and is made of a light resin with high transmittance such as acrylic resin such as PMMA, polystyrene, polycarbonate, etc., but is not limited thereto. .
  • the cover 4 may be a surface processed so that emitted light is diffused.
  • the light emitting unit 3 includes an attachment angle 31, a substrate 32 that is fixed to the attachment angle 31 and on which an LED 33 (described later) as a light source is mounted, and a condensing member 5 that is disposed so as to cover the substrate 32. I have. In addition, it can be said that the board
  • the light emitting unit 3 will be described with reference to a new drawing. 2 is a view of a light emitting unit used in the illumination device shown in FIG. 1 as viewed from the side, and FIG. 3 is a view of the light emitting unit as viewed from below in FIG.
  • the mounting angle 31 of the light emitting part 3 is formed by cutting and bending a metal plate. As shown in FIG. 1 and the like, the mounting angle 31 includes a rectangular flat plate portion 311, a plate-like fixing portion 312 extending from one long side of the flat plate portion 311, and a flat plate from the other long side of the flat plate portion 311. A holding portion 313 extending to the opposite side to the fixing portion 312 with respect to the portion 311 is provided.
  • the mounting angle 31 is formed in a regular octagonal cylindrical shape by connecting the short sides of the adjacent flat plate portions 311 together.
  • the fixing portion 312 extends toward the outside of the regular octagon
  • the holding portion 313 extends toward the inside of the regular octagon.
  • the regular octagonal thing is shown in the illuminating device A, it is not limited to this. It may be a shape that can hold a flat substrate in a cylindrical shape, and may be a shape close to a circle (for example, a regular hexagon, a regular dodecagon, etc.).
  • the mounting angle 31 is divided into two members so that four flat plate portions 311 are included. Then, the divided members are manufactured by pressing metal plates one by one, and then joined to form a regular octagonal cylindrical shape.
  • the attachment angle 31 is divided
  • segmented member into the same shape the shape of the metal plate of material and the metal mold
  • the substrate 32 is arranged so that the LED 33 is on the outer side of the regular octagonal cylindrical shape on the flat plate portion 311 of the mounting angle 31, and the longitudinal direction is the H direction. Attached to and fixed.
  • FIG. 4 is an enlarged front view of the flat plate portion to which the light source portion is attached
  • FIG. 5 is a cross-sectional view of the flat plate portion shown in FIG. 4 cut along the line VV.
  • the light collecting member 5 is disposed on the most front side.
  • positioned at the back surface of the condensing member 5 and LED33 are also shown as the continuous line.
  • the upper fixing portion 312 is fixed to the chassis 1 with screws Bt, and the cover 4 is attached to the holding portion 313 with screws Bt.
  • the flat plate portion 311 is provided with a cut-and-raised portion 314 protruding inside the regular octagonal cylindrical shape, and the circuit board 21 is fixed to the cut-and-raised portion 314 with screws Bt.
  • the circuit board 21 is disposed in the central portion, so that the central portion is a non-light emitting portion.
  • the non-light-emitting portion is small, and the smaller the one side of the regular octagon of the mounting angle 31 is, the smaller the non-light-emitting portion is.
  • chip-shaped LEDs 33 are mounted on a rectangular substrate 32 attached to the flat plate portion 311.
  • the LED 33 has a rectangular parallelepiped package having a square shape in plan view.
  • the LEDs 33 are linearly arranged in the longitudinal direction, and the linear arrangement of the LEDs 33 is arranged in three stages in the short direction.
  • the length of the substrate in the longitudinal direction can be shortened.
  • the length of one side of the regular octagon of the mounting angle 31 can be reduced, and the non-light-emitting portion of the illumination device A can be reduced.
  • the LED 33 arranged in the H direction is arranged in three stages in the V direction.
  • the LEDs 33 at each stage are arranged in the H direction.
  • the LEDs 33 in each stage are arranged at substantially equal intervals, and the number of LEDs 33 is larger in the central stage than in the upper and lower stages.
  • the larger the light emitting surface area, that is, the larger the number of LEDs 33 the larger the amount of light emitted.
  • the light emitted from the central portion is brighter than the light emitted from the upper and lower stages.
  • the light emitted from the light source unit having a plurality of stages of LEDs 33 arranged in the H direction in the V direction is condensed by a conventional collimator lens, the light is directed upward from the upper LED 33.
  • the irradiation range in the V direction of light is wide from the lower LED 33 to the light going downward.
  • the LED 33 is a point light source, and the emitted light is divergent light (Lambertian light distribution).
  • the light emitted from the LED 33 has a high luminous flux density in the vicinity of the mounting angle 31.
  • the light flux density of the light applied to the chassis 1 is higher in the light emitted from the LED 33 in the stage near the chassis 1 than in the light emitted from the LED 33 in the other stage.
  • the light having a high luminous flux density is reflected by the chassis 1 and emitted from the cover 4. Further, the light flux density of the light transmitted through the vicinity of the mounting angle 31 of the cover 4 is high from the light emitted from the LED 33 at the stage close to the cover 4.
  • the light emitting unit 3 is arranged at a stage close to the chassis 1 and the cover 4 of the substrate 32.
  • the number of LEDs 33 is smaller than that of the central stage.
  • the variation (luminance unevenness) in the light flux density of the light emitted from the cover 4 can be suppressed.
  • the illuminating device configured to emit light from the LED 33 along the cover 4 that is a light emitting surface
  • the condensing member 5 as shown in FIG. 5 is used, the light radiate
  • FIG. 6 is an enlarged view of the substrate and the light collecting member attached to the attachment angle.
  • the condensing member 5 is formed on the side opposite to the facing surface 50 facing the LED 33 mounted on the substrate 32, and condenses the light emitted from the LED 33 only in the V direction. 52 is formed.
  • the condensing unit 52 is arranged in three stages in the V direction and corresponds to each of the arrays of LEDs 33 arranged in the H direction, and condenses light emitted from the LEDs 33 arranged in each stage in the V direction. It has become.
  • the shape of the condensing part 52 is not limited to a collimator lens shape, What is necessary is just an optical element which can condense in the V direction of LED32, for example, a cylindrical lens may be used.
  • a spacer 51 is formed on the facing surface 50 of the light collecting member 5 facing the substrate 32, and the light collecting member comes into contact with the substrate 32 by contacting the spacer 51. 5 is suppressed from contacting the LED 33.
  • substrate of the condensing member 5 is a rectangular shape, and the positioning boss
  • a snap fit 54 extending in the same direction as the pair of positioning bosses 53 is formed at the central portion of the long side on the upper side in the V direction of the facing surface 50.
  • the positioning boss 53 is a member having the same shape, but the left positioning boss 531 is the left positioning boss 531 and the right positioning boss 532 is the right when viewed from the facing surface 50 side of the light collecting member 5. Then, the two positioning bosses 53 and the snap fit 54 are formed in a triangular shape with the line connecting the two positioning bosses 53 as the base (so that the two positioning bosses 53 and the snap fit 54 are not in a straight line). Has been placed.
  • the substrate 32 has through holes 321 and 322 through which the positioning boss 53 passes.
  • the left positioning boss 531 is inserted into the right through hole 321 (first through hole), and the right positioning boss 532 is inserted into the left through hole 322 (second through hole).
  • the right through hole 321 is a cylindrical through hole having an inner diameter that is substantially the same as the outer diameter of the positioning boss 53 and into which the left positioning boss 531 can be inserted without stress. Further, the right through-hole 321 is formed at a position where the left positioning boss 531 is inserted when the light collecting member 5 is disposed at an accurate position with respect to the substrate 32.
  • the left through hole 322 has a long hole shape extending along a line connected to the right through hole 321, and has a width that allows the right positioning boss 532 to be inserted without stress.
  • the left through hole 322 has a long hole shape, the distance between the left positioning boss 531 and the right positioning boss 532 and the length between the right through hole 321 and the left through hole 322 are shifted. Even in this case, the left positioning boss 531 and the right positioning boss 532 can be inserted into the right through hole 321 and the left through hole 322, respectively. Since the left through-hole 322 extends along a line connecting the right through-hole 321, even if a force acts so that the light collecting member 5 rotates around the left positioning boss 531, Since the right positioning boss 532 receives a reaction force from the inner wall of the left through-hole 322, it does not rotate. Thereby, it is possible to position the board
  • a right side through hole 3111 having the same shape as the right side through hole 321 of the substrate 32 and a left side through hole 3112 having the same shape as the left side through hole 322 are also formed in the flat plate portion 311 of the mounting angle 31.
  • a portion of the left positioning boss 531 protruding from the substrate 32 is a right through hole 3111 and a portion of the right positioning boss 532 protruding from the substrate 32 is a left through hole 3112. It is possible to easily and accurately position the substrate 32 and the light collecting member 5 with respect to the mounting angle 31.
  • the light condensing member 5 is formed with a snap fit 54.
  • the snap fit 54 is not engaged with the substrate 32 and is formed on the flat plate portion 311 of the mounting angle 31.
  • the condensing member 5 is suppressed from being pulled out by being inserted into the engaging hole 3110 (engagement portion) and engaging with the peripheral portion of the engagement hole 3110.
  • the opposing surface 50 of the light collecting member 5 is provided with a spacer 51, and the left positioning boss 531 is inserted into the right through hole 321 and the right positioning boss 532 is inserted into the left through hole 322.
  • the substrate 32 and the spacer 51 come into contact with each other.
  • the spacer 51 is in contact with the portion where the LED 33 is not mounted, and the contact between the LED 33 and the facing surface 50 is suppressed.
  • the left positioning boss 531 is inserted into the right through hole 3111, the right positioning boss 532 is inserted into the left through hole 3112, and the snap fit 54 and the engagement hole 3110 are engaged with each other.
  • the members 5 can be adjusted with respect to each other accurately and temporarily fixed at an accurate position with respect to the mounting angle 31.
  • the left side positioning boss 531 and / or the right side positioning boss 532 are provided with the right through hole 3111 and / or the left through hole even when the light collecting member 5 rotates in the V direction around the snap fit 54. It is preferable that the length is such that it does not come off from 3112. By being formed in this way, even when vibration or impact is applied in a state where the substrate 32 and the light collecting member 5 are attached to the attachment angle 31 by the positioning boss 53 and the snap fit 54, the substrate 32 and the collector 32 are collected. The optical member 5 is prevented from being displaced from the mounting angle 31.
  • the substrate 32 and the light collecting member 5 are temporarily fixed to the flat plate portion 311 with the positioning boss 53 and the snap fit 54, and then fixed to the flat plate portion 311 with two screws Sc.
  • the screw Sc passes through the spacer 51 and is screwed into the flat plate portion 311.
  • the screw Sc is not limited to this, and passes through a portion of the facing surface 50 different from the portion where the spacer 51 is formed. May be.
  • the light condensing member 5 is formed with a snap fit 54 at the center portion of the long side opposite to the long side to which the positioning boss 53 is close, but the invention is not limited to this.
  • the above snap fit 54 may be formed.
  • it may be formed in the central portion of the long side close to the positioning boss 53, or instead of the snap fit formed on the long side, One snap fit may be provided on each short side.
  • the condensing member 5 and the substrate 32 having such a configuration are accurately positioned in advance by the positioning boss 53 and then temporarily fixed to the mounting angle 31 by the positioning boss 53 and the snap fit 54, for example, FIG. 1, even when the flat plate portion 311 is not horizontal, the mounting angle 31 can be easily and reliably fixed. Thereby, an attachment process can be simplified compared with the case where fixation of the board
  • the mounting angle 31 can be freely moved to some extent, so that the four mounting angles 31 shown in FIG. It is also possible to screw together after attaching the substrate 32 and the light collecting member 5 to the individual flat plate portions 311 in advance. Therefore, for example, the screwing process can be automated by a robot, and the manufacturing cost can be reduced.
  • a reflection sheet is disposed on the surface of the substrate 32 on which the LED 33 is mounted with a through hole through which the positioning boss 53 passes, and the reflection sheet, the substrate 32, and the light collecting member 5 are simultaneously positioned and temporarily fixed. It is also possible to do.
  • the member that is temporarily fixed at the same time as the substrate is not limited to the reflective sheet, but can be formed with a through-hole through which the positioning boss passes, and can be temporarily fixed by the locking force of the snap fit 54. Things can be held widely.
  • FIG. 8 is a bottom view of a light collecting member and a substrate used in another example of the illumination device according to the present invention.
  • the illuminating device shown in the present embodiment has the same configuration as the illuminating device shown in FIG. 1 and the like, except that the shapes of the light collecting member 5B and the substrate 32 are different. Detailed description of the portion is omitted.
  • the substrate 32 is fixed to the flat plate portion 311 of the mounting angle 31 with a double-sided tape 34.
  • the light condensing member 5B is formed with two snap fits 55 that protrude from both ends in the longitudinal direction, that is, from a portion far from the positioning boss 53 on the short side of the rectangular opposing surface 50, one by one.
  • it is not limited to the double-sided tape 34,
  • attachment method which can fix the board
  • the substrate 32 and the light collecting member 5B are positioned by the positioning bosses 531 and 532 and the through holes 321 and 322. Since the positioning of the substrate 32 and the light collecting member 5B is the same as described above, detailed description thereof is omitted.
  • the substrate 32 and the condensing member 5B are mounted and fixed to the mounting angle 31 in a state where the substrate 32 and the light collecting member 5B are accurately positioned. At this time, the substrate 32 is fixed by the double-sided tape 34, and the light collecting member 5B inserts the positioning bosses 531 and 532 into the through holes 3111 and 3112 and engages the two snap fits 55 with the engagement holes 3110.
  • the substrate 32 is firmly fixed by the double-sided tape 34 by mounting and fixing, and the light collecting member 5B can be fixed by the positioning bosses 531 and 532 and the two snap fits 55 so as not to be displaced.
  • the screwing step can be omitted.
  • a light-transmitting low (or no) screw is omitted from the light condensing member, which is an optical member, the light emitted from the LED 33 can be used efficiently.
  • the condensing member 5B when fixing the condensing member 5B to the mounting angle 31 only with the positioning boss 53 and the snap fit 55, the condensing member 5B may be formed of a material having a wide elastic region and being difficult to be brittlely broken. preferable.
  • the lighting device is a so-called ceiling lamp of the type attached to the ceiling, but is not limited to the ceiling lamp as long as it includes a chassis having a reflecting portion, for example,
  • the configuration of the lighting device of the present invention can also be used for hanging type lighting or the like.
  • the light emitting unit 3 is attached to the central portion of the circular chassis 1. Although it is difficult with the circular chassis 1, it is also possible to arrange the light emitting part at the edge of the chassis by using a polygonal chassis. Accordingly, an illumination device in which a light emitting unit is arranged on the edge of the chassis will be described with reference to the drawings.
  • FIG. 9 shows an exploded perspective view of another example of a lighting device according to the present invention.
  • the lighting device B includes a rectangular chassis 6 and a cover 60 that covers the chassis 6.
  • the chassis 6 is formed by cutting and bending a metal plate, and includes a rectangular flat plate portion 61 and side wall portions 62 formed by bending each side of the flat plate portion.
  • the light source unit including the substrate 32 on which the LED 33 is mounted and the light collecting member 5 are attached to the side wall portion 62 formed by bending the short side of the flat plate portion 61 of the chassis 6. .
  • the flat plate portion 61 of the chassis 6 is configured to efficiently reflect the light from the LED 33 toward the cover 60 side. Examples of the treatment of the flat plate portion 61 include well-known ones such as white coating and reflection sheet pasting.
  • the cover 60 of the side wall 62 of the chassis 6 is attached and fixed. Since the cover 60 has the same configuration except that the shape of the cover 60 is different from that of the cover 4 of the illumination device A, the details are omitted.
  • the drive control unit 2 is attached to the back surface of the flat plate portion 61. In the illuminating device B having such a configuration, the drive control unit 2, the mounting angle 3 and the like are not arranged in the central portion of the illuminating device. It is possible to reduce unevenness in the brightness of the emitted light.
  • a circular through-hole 610 as shown by a two-dot chain line is formed in the flat plate portion 61, and a connector arranged on the ceiling passes through the 610, and the flat plate portion 61. May be fixed.
  • a connector arranged on the ceiling passes through the 610, and the flat plate portion 61. May be fixed.
  • square shape may be sufficient, and polygonal shapes other than a square may be sufficient.
  • the illuminating device of the present invention Since the illuminating device of the present invention emits planar light from the light emitting surface, it can also be used as a backlight of a liquid crystal display device.
  • FIG. 10 is an exploded perspective view showing an example of the liquid crystal display device according to the present invention.
  • the liquid crystal display device 8 includes a liquid crystal panel unit 81 and a backlight unit 82.
  • a liquid crystal panel unit 81 is arranged on the front side (observer side) of the backlight unit 82, and the liquid crystal panel unit 81 is placed on a metal bezel 83 having an opening window 830 in the center on the front side. It is being held down.
  • the liquid crystal panel unit 81 includes a liquid crystal panel 811 in which liquid crystal is sealed, and a polarizing plate 812 attached to the front surface (observer side) and the back surface (backlight unit 1 side) of the liquid crystal panel 811.
  • the liquid crystal panel 811 includes an array substrate 813, a counter substrate 814 disposed to face the array substrate 813, and liquid crystal filled between the array substrate and the counter substrate.
  • the array substrate 813 is provided with a source wiring and a gate wiring orthogonal to each other, a switching element (for example, a thin film transistor) connected to the source wiring and the gate wiring, a pixel electrode connected to the switching element, an alignment film, and the like.
  • the counter substrate 814 is provided with a color filter in which colored portions of red, green, and blue (RGB) are arranged in a predetermined arrangement, a common electrode, an alignment film, and the like.
  • a voltage is applied between the array substrate 813 and the counter substrate 814 in each pixel of the liquid crystal panel 811 by driving the switching element.
  • the voltage between the array substrate 813 and the counter substrate 814 changes, the liquid crystal in each pixel rotates and light is modulated (the degree of light transmission is changed). As a result, an image is displayed in the image display area on the viewer side of the liquid crystal panel 811.
  • the bezel 83 is a metal frame, and has a shape that covers the front edge portion of the liquid crystal panel unit 81.
  • the bezel 83 includes a rectangular opening window 830 formed so as not to hide the image display area of the liquid crystal panel unit 81, a pressing portion 831 that presses the liquid crystal panel unit 81 from the front side, and a rear surface from the edge of the pressing portion 831. And a cover portion 832 that covers the edges of the liquid crystal panel unit 81 and the backlight unit 82.
  • the bezel 83 is grounded and shields the liquid crystal panel unit 81 and the backlight unit 82.
  • the backlight unit 82 is an illumination device that irradiates the liquid crystal panel unit 81 with planar light.
  • the backlight unit 82 has a structure equivalent to that of the lighting device shown in the first embodiment. That is, the backlight chassis 821 having a rectangular bottom corresponding to the chassis 1 and the light source unit 823 corresponding to the light emitting unit 3 are provided. Since the backlight unit 82 is a member having a rectangular bottom surface, the light source unit 823 is disposed on both short sides. And although illustration is abbreviate
  • An optical sheet member 822 for diffusing outgoing light and increasing luminance is disposed on the light outgoing surface side of the backlight unit 82.
  • the structure of the light source unit 823 has substantially the same structure as that of the light emitting unit 3 except that the substrate is arranged in a straight line. That is, a plurality of substrates 32 and light collecting members 5 on which the LEDs 33 shown in FIG. 4 are mounted are attached to the short side.
  • the backlight unit 82 since the light source unit 823 is attached to the outer peripheral portion of the backlight chassis 821, the side wall portions that are raised from the sides of the rectangular bottom surface are formed to form the attachment angle. Can be used as
  • Such a backlight unit 82 can emit planar light with less luminance unevenness than the light emitting surface facing the bottom without using a light guide plate, and the number of components can be reduced accordingly. is there.
  • the liquid crystal display device shown in the present embodiment can be employed in, for example, a mobile phone, a tablet PC, a display device for home appliances, a television receiver, and the like.
  • a ceiling lamp or a backlight of a liquid crystal display device is given as the illumination device.
  • the illumination device can also be used as a back-side illumination device that illuminates from the back of an electric signboard or the like. Is possible.
  • the illuminating device according to the present invention emits light with less unevenness in luminance, so it can be attached to the ceiling of a living room or the like, and can be used as a backlight for a lighting fixture or a liquid crystal display device that irradiates the entire light.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Led Device Packages (AREA)

Abstract

Dispositif d'éclairage (A) où : un substrat (32) possède un premier trou traversant cylindrique (321) ayant le même diamètre intérieur que le diamètre extérieur d'un bossage de positionnement (53), et un second trou traversant (322) en forme de trou allongé s'étendant le long d'une ligne reliée au premier trou traversant (321) ; une section de pointe du bossage de positionnement (53) faisant saillie depuis le premier trou traversant (321) et le second trou traversant (322) est introduite dans les trous traversants (3111, 3112) formés dans un boîtier (1) ; et un élément d'emboîtement (54) vient en prise avec une section de mise en prise (3110) ; de sorte qu'une source de lumière et un élément de collecte de lumière puissent être positionnés de façon précise, et la source de lumière et l'élément de collecte de lumière puissent être facilement fixés au boîtier.
PCT/JP2012/077403 2011-10-31 2012-10-24 Dispositif d'éclairage, rétro-éclairage, et dispositif d'affichage à cristaux liquides WO2013065534A1 (fr)

Priority Applications (1)

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JP2013541718A JP5665155B2 (ja) 2011-10-31 2012-10-24 照明装置、バックライト及び液晶表示装置

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JP2011239374 2011-10-31
JP2011-239374 2011-10-31

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WO2013065534A1 true WO2013065534A1 (fr) 2013-05-10

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JP (1) JP5665155B2 (fr)
WO (1) WO2013065534A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015144074A (ja) * 2014-01-31 2015-08-06 京セラドキュメントソリューションズ株式会社 導光体及び照明装置
JP2020021648A (ja) * 2018-08-01 2020-02-06 三菱電機株式会社 光源ユニット
US11267707B2 (en) 2019-04-16 2022-03-08 Honeywell International Inc Purification of bis(fluorosulfonyl) imide
US11778956B2 (en) * 2018-04-06 2023-10-10 Walmart Apollo, Llc Automated vertical farming system using mobile robots

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3154440U (ja) * 2009-04-15 2009-10-22 廣東明家科技股▲分▼有限公司 光学屈折装置の結合構造
JP2011204699A (ja) * 2011-07-13 2011-10-13 Sharp Corp 照明装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3154440U (ja) * 2009-04-15 2009-10-22 廣東明家科技股▲分▼有限公司 光学屈折装置の結合構造
JP2011204699A (ja) * 2011-07-13 2011-10-13 Sharp Corp 照明装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015144074A (ja) * 2014-01-31 2015-08-06 京セラドキュメントソリューションズ株式会社 導光体及び照明装置
US11778956B2 (en) * 2018-04-06 2023-10-10 Walmart Apollo, Llc Automated vertical farming system using mobile robots
JP2020021648A (ja) * 2018-08-01 2020-02-06 三菱電機株式会社 光源ユニット
JP7202804B2 (ja) 2018-08-01 2023-01-12 三菱電機株式会社 光源ユニット
US11267707B2 (en) 2019-04-16 2022-03-08 Honeywell International Inc Purification of bis(fluorosulfonyl) imide

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JP5665155B2 (ja) 2015-02-04

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