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WO2012032978A1 - Feuille réfléchissante, dispositif d'éclairage, et dispositif d'affichage - Google Patents

Feuille réfléchissante, dispositif d'éclairage, et dispositif d'affichage Download PDF

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Publication number
WO2012032978A1
WO2012032978A1 PCT/JP2011/069720 JP2011069720W WO2012032978A1 WO 2012032978 A1 WO2012032978 A1 WO 2012032978A1 JP 2011069720 W JP2011069720 W JP 2011069720W WO 2012032978 A1 WO2012032978 A1 WO 2012032978A1
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WIPO (PCT)
Prior art keywords
reflection sheet
light
sheet according
sheet
backlight unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2011/069720
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English (en)
Japanese (ja)
Inventor
真之助 野澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of WO2012032978A1 publication Critical patent/WO2012032978A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0977—Reflective elements
    • G02B27/0983—Reflective elements being curved
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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

Definitions

  • the present invention relates to a reflection sheet, an illumination device, and a display device, and more particularly, to a reflection sheet that reflects light from a light source, an illumination device having the reflection sheet, and a display device including the illumination device.
  • a backlight unit for supplying light is usually mounted on the liquid crystal display panel.
  • the backlight unit is preferably configured to generate planar light that spreads over the entire area of the planar liquid crystal display panel.
  • a direct backlight unit is known as a backlight unit for supplying light to a liquid crystal display panel.
  • the direct type backlight unit has a configuration in which, for example, a plurality of LEDs (Light Emitting Diodes) serving as a light source are arranged below the diffusion plate. And it is comprised so that the light from several LED may be spread
  • the conventional backlight unit has a disadvantage in that the brightness decreases at the corners (four corners) where the light is difficult to reach compared to other parts. . Further, since the amount of light flux is relatively low at the corners of the backlight unit as compared with the central part, the luminance also decreases at the corners (four corners). That is, the conventional backlight unit has a disadvantage that the four corners on the illumination surface of the backlight unit are darker than other portions. For this reason, luminance unevenness occurs in the light from the illumination surface, which makes it difficult to make the luminance uniform.
  • the present invention has been made to solve the above-described problems, and one object of the present invention is to provide a reflective sheet and an illuminating device capable of making the luminance uniform by reducing luminance unevenness. And providing a display device.
  • the reflection sheet according to the first aspect of the present invention includes a bottom portion having a corner portion and side portions provided on the outer periphery of the bottom portion. And the said side part is formed so that it may spread outside in the corner part of a bottom part.
  • the reflection sheet of this invention contains not only a sheet form but a plate-shaped member.
  • the side portion is formed so as to spread outward at the corner portion of the bottom portion, so that the light incident on the side portion is reflected more toward the corner portion side. be able to.
  • the side portion is formed so as to spread outward at the corner portion of the bottom portion, so that the light incident on the side portion is reflected more toward the corner portion side. be able to.
  • the first aspect by configuring as described above, it is possible to suppress a decrease in luminance at the corner even when the bottom and the side are formed of the same material. For this reason, since uneven brightness can be improved without processing a plurality of materials, it can be processed easily. As a result, it is possible to easily obtain a reflection sheet that can make the luminance uniform.
  • an illuminating device is comprised using the reflective sheet by the said 1st aspect, the illuminating device with which the brightness nonuniformity in the corner part was improved can be obtained.
  • the bottom portion is formed in a substantially rectangular shape including a pair of long sides and a pair of short sides, and a plurality of side portions correspond to each side of the bottom portion. At least one of the plurality of side portions is formed in a curved shape when seen in a plan view.
  • the side part of a reflective sheet is formed in a curved shape, the said side part can be made into the shape which spreads outside in the corner part of a bottom part. For this reason, since the light incident on the side portion can be easily reflected to the corner portion side, a decrease in luminance at the corner portion can be easily suppressed.
  • the side portions may be provided in a curved shape on at least one of the pair of long sides and the pair of short sides. Even in such a configuration, light can be reflected toward the corner, so that the luminance at the corner can be improved.
  • each of the plurality of side portions is formed in a curved shape when seen in a plan view. If comprised in this way, since the fall of the brightness
  • the side portion may be formed in a polygonal shape.
  • the bottom part can be formed so that the center part is raised.
  • the side portion is preferably formed integrally with the bottom portion. If comprised in this way, a reflective sheet can be processed easily from a single material.
  • the side portion may be formed separately from the bottom portion.
  • the side portion is formed to rise at a predetermined angle with respect to the bottom portion.
  • the side part of the reflection sheet may be formed so as to rise vertically with respect to the bottom part, or may be formed so as to stand up at an angle other than vertical.
  • the lighting device includes the reflection sheet according to the first aspect and a light source disposed at the bottom of the reflection sheet. If comprised in this way, the illuminating device which can radiate
  • the light source can be composed of a light emitting diode.
  • a plurality of the light emitting diodes are arranged two-dimensionally on the bottom of the reflection sheet.
  • the light source may be composed of a fluorescent lamp.
  • the fluorescent lamp is preferably composed of a cold cathode tube.
  • a display device includes the illumination device according to the second aspect and a display panel that receives light from the illumination device. With this configuration, it is possible to easily obtain a display device with high luminance uniformity in which luminance reduction at corners is suppressed.
  • the present invention it is possible to easily obtain a reflection sheet, an illumination device, and a display device that can make the luminance uniform by reducing the luminance unevenness.
  • 1 is an exploded perspective view of a liquid crystal display device including a backlight unit according to a first embodiment of the present invention. It is a perspective view of the reflective sheet by 1st Embodiment of this invention. It is the perspective view which showed the state which accommodated the reflective sheet by 1st Embodiment of this invention in the backlight chassis. It is the top view which showed typically a part of backlight unit by 1st Embodiment of this invention.
  • 1 is a perspective view schematically showing a liquid crystal display device according to a first embodiment of the present invention. 1 is a cross-sectional view illustrating a part of a liquid crystal display device according to a first embodiment of the present invention.
  • top view which showed typically a part of backlight unit by 1st Embodiment of this invention, and is also an optical path figure which showed the optical path of light. It is the top view which showed typically a part of backlight unit by the 1st modification of 1st Embodiment. It is the top view which showed typically a part of backlight unit by the 2nd modification of 1st Embodiment. It is sectional drawing which showed typically a part of backlight unit by the 3rd modification of 1st Embodiment. It is sectional drawing which showed typically a part of backlight unit by the 4th modification of 1st Embodiment. It is the perspective view which showed the reflective sheet by 2nd Embodiment of this invention.
  • FIG. 16 is a schematic cross-sectional view along the line AA in FIG. 15.
  • FIG. 16 is a schematic cross-sectional view along the line BB in FIG. 15. It is the perspective view which showed the reflective sheet by the modification of this invention.
  • FIG. 1 is an exploded perspective view of a liquid crystal display device including a backlight unit according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the reflection sheet according to the first embodiment of the present invention.
  • FIG. 3 is a perspective view showing a state in which the reflection sheet according to the first embodiment of the present invention is housed.
  • 4 to 7 are views for explaining the backlight unit including the reflection sheet according to the first embodiment of the present invention.
  • a reflective sheet according to a first embodiment of the present invention, a backlight unit using the reflective sheet, and a liquid crystal display device equipped with the backlight unit will be described with reference to FIGS.
  • the liquid crystal display device 100 includes a liquid crystal display panel 10, a backlight unit 50 that supplies light to the liquid crystal display panel 10, and a pair facing each other with these interposed therebetween.
  • Housing 70 front housing 71, back housing 72.
  • the liquid crystal display device 100 is an example of the “display device” in the present invention
  • the liquid crystal display panel 10 is an example of the “display panel” in the present invention
  • the backlight unit 50 is an example of the “lighting device” in the present invention.
  • an active matrix substrate 11 including a switching element such as a TFT (Thin Film Transistor) and an opposite substrate 12 facing the active matrix substrate 11 are bonded to each other with a sealing material (not shown). It is constituted by.
  • a liquid crystal (not shown) is injected into the gap between the substrates 11 and 12.
  • a polarizing film 13 is attached to each of the light receiving surface side of the active matrix substrate 11 and the light emitting surface side of the counter substrate 12.
  • the liquid crystal display panel 10 configured in this manner displays an image by using a change in transmittance caused by the tilt of liquid crystal molecules.
  • the backlight unit 50 is a direct-type backlight unit, and includes the LED module 20, the backlight chassis 30, the reflection sheet 40, the diffusion plate 45, the prism sheet 46, and the lens sheet 47. is doing.
  • the backlight unit 50 is disposed directly below the liquid crystal display panel 10.
  • the backlight chassis 30 is a substantially box-shaped member opened on the liquid crystal display panel 10 side, and has a bottom portion 30a and a side portion 30b provided on the outer periphery of the bottom portion 30a.
  • the backlight chassis 30 is formed, for example, by processing a metal plate-like member, and accommodates them by spreading the LED module 20 and the reflection sheet 40 on the bottom surface 30c.
  • region enclosed by the side part 30b of the backlight chassis 30 becomes substantially rectangular shape (substantially rectangular shape), and the area
  • the backlight chassis 30 is formed in a substantially rectangular shape, and thus has a pair of long sides 31 and a pair of short sides 32 in plan view. Yes.
  • the LED module 20 constituting the backlight unit 50 is a module that emits light, and includes a mounting substrate 21 and an LED 22 as a light source mounted on the mounting surface 21a of the mounting substrate 21.
  • the mounting substrate 21 is a plate-like and rectangular substrate, and a plurality of electrodes (not shown) are arranged on the mounting surface 21a. And said LED22 is attached on these electrodes.
  • the LED 22 is mounted on an electrode (not shown) formed on the mounting surface 21a of the mounting substrate 21 so as to receive light and emit light. Further, as shown in FIG. 1, a plurality of LEDs 22 as light sources are mounted in the accommodation area of the backlight chassis 30. Each of the plurality of LEDs 22 is composed of a white LED (white light emitting diode), and is two-dimensionally arranged in the accommodation region of the backlight chassis 30 (on the bottom surface 30c of the backlight chassis 30).
  • the reflection sheet 40 included in the backlight unit 50 is formed, for example, by processing a resin sheet member, and includes a bottom portion 41 and side portions 42 provided on the outer periphery of the bottom portion 41. Yes. Specifically, the side portion 42 is formed so as to rise at a predetermined angle with respect to the bottom portion 41 by bending the end of the single sheet member. Further, as shown in FIG. 4, the bottom portion 41 of the reflection sheet 40 is formed in a substantially rectangular shape including a pair of long sides 41 b and a pair of short sides 41 c as viewed in a plan view. A plurality of side portions 42 are provided so as to correspond to the respective sides of the bottom portion 41. Therefore, the reflection sheet 40 is formed in a substantially box shape with an opening above the bottom 41. The long side 41b and the short side 41c of the reflection sheet 40 are formed so as to correspond to the long side 31 and the short side 32 of the backlight chassis 30, respectively.
  • the reflection sheet 40 is housed in the housing area of the backlight chassis 30 together with the LED module 20 so that a part of the LED 22 protrudes from the hole 41a.
  • the bottom surface 30 c of the backlight chassis 30 and the mounting surface 21 a of the mounting substrate 21 are covered by the bottom 41 of the reflection sheet 40, and the inner side surface of the backlight chassis 30 is covered by the side 42 of the reflection sheet 40.
  • the bottom 41 of the reflection sheet 40 is formed in a substantially rectangular shape, so that the bottom 41 has four corners 43. .
  • the side part 42 (inner surface 42a) of the reflective sheet 40 is formed so that it may spread outside in a plan view.
  • each of the four side portions 42 provided on each side of the bottom portion 41 is formed in a curved shape (arc shape) when seen in a plan view.
  • the curved side portion 42 is formed so that the central portion protrudes inward.
  • the said side part 42 is comprised so that it may spread outside as it leaves
  • the side portion 42 since the side portion 42 is formed in a curved shape, not only the corner portion 43 but also the region near the corner portion is formed so that the side portion 42 extends outward.
  • the side part 42 of the reflective sheet 40 is formed so that the angle (alpha) with respect to the bottom part 41 may become an obtuse angle.
  • the light from the LED 22 incident on the side portion 42 is reflected by the side portion 42 and guided to the liquid crystal display panel 10 side (the diffusion plate 45 side).
  • the diffusion plate 45 is an optical sheet that overlaps the LED module 20, and diffuses the light emitted from the LED module 20 (LED 22). That is, the diffusion plate 45 diffuses the light from the LEDs 22 and spreads the light over the entire area of the liquid crystal display panel 10.
  • the prism sheet 46 is an optical sheet that overlaps the diffusion plate 45.
  • this prism sheet 46 for example, triangular prisms extending in one direction (linearly) are arranged in a direction intersecting with one direction in the sheet surface, and the radiation characteristic of light from the diffusion plate 45 is deflected.
  • the lens sheet 47 is an optical sheet that overlaps the prism sheet 46.
  • fine particles that refract and scatter light are dispersed in the lens sheet 47, and the light from the prism sheet 46 is not collected locally, and the difference in brightness (light intensity unevenness) is suppressed.
  • the liquid crystal display panel 10 (see FIG. 5) is arranged so that the display area 14 is positioned within the opening of the reflection sheet 40 in the backlight unit 50.
  • the backlight unit 50 forms planar light by superimposing light from the plurality of LEDs 22 (LED modules 20), and the planar light is converted into a plurality of optical members 45. To 47 and supplied to the liquid crystal display panel 10. Thereby, the non-light-emitting liquid crystal display panel 10 receives the light (backlight light) from the backlight unit 50 and improves the display function.
  • the reflection sheet 40 reflects the light from the LED 22 to the corner 43 side (white arrow R side) by the side portion 42.
  • the side portion 42 is formed in a curved shape, so that the light (linear arrows) incident on the side portion 42 (inner surface 42a) is compared to the case where the side portion is formed in a straight shape (see the broken line E). Since the incident angle of P1 is increased, the light incident on the side portion 42 (see the straight arrow P1) is reflected more toward the corner 43 side (white arrow R side). On the other hand, when the side part is formed in a straight line (see the broken line E), the light incident on the side part (see the broken line arrow P2) is not easily reflected on the corner 43 side.
  • the reflection sheet 40 constituting the backlight unit 50 is incident on the side portion 42 by forming the side portion 42 so as to spread outward at least at the corner portion 43.
  • the reflected light can be reflected to the corner 43 side (the white arrow R side in FIGS. 4 and 7).
  • the reflection sheet 40 can be formed by processing a single sheet member, luminance unevenness can be improved without processing a plurality of materials. That is, the reflection sheet 40 can be easily processed from a single material by forming the side portion 42 integrally with the bottom portion 41. For this reason, the reflective sheet 40 can be easily processed, and by using this reflective sheet 40, luminance unevenness can be easily reduced.
  • the plurality of side portions 42 provided on each side of the bottom portion 41 of the reflection sheet 40 are respectively formed in a curved shape, a decrease in luminance at the four corners can be suppressed. , Brightness unevenness can be effectively reduced.
  • FIG. 8 is a plan view schematically showing a part of the backlight unit according to the first modification of the first embodiment.
  • FIG. 9 is a plan view schematically showing a part of the backlight unit according to the second modification of the first embodiment.
  • the configuration is the reverse of the first modification. That is, in the reflection sheet 40, the side part 42 provided in a pair of long side 41b is formed in linear form, and the side part 42 provided in a pair of short side 41c is formed in curved shape. Even in such a configuration, light can be reflected toward the corner 43 side as described above.
  • FIG. 10 is a cross-sectional view schematically showing a part of a backlight unit according to a third modification of the first embodiment.
  • a gap 35 formed between the side portion 42 of the reflective sheet 40 and the backlight chassis 30 (FIGS. 4 to 6, FIG. 8 to FIG. 10) is filled with the resin 36.
  • the reflection sheet 40 can be fixed by filling the resin 36 in the gap 35 between the reflection sheet 40 and the backlight chassis 30 as described above, the reflection sheet 40 (side portion 42) can be fixed. The deviation can be prevented and the luminance unevenness can be surely reduced.
  • FIG. 11 is a cross-sectional view schematically showing a part of a backlight unit according to a fourth modification of the first embodiment.
  • the side portion 42 of the reflection sheet 40 is formed to be substantially perpendicular to the bottom portion 41. Even in such a configuration, since light can be reflected toward the corner 43, a decrease in luminance at the corner 43 can be suppressed.
  • FIG. 12 is a perspective view showing a reflective sheet according to the second embodiment of the present invention.
  • the reflection sheet by 2nd Embodiment of this invention is demonstrated.
  • corresponding components are denoted by the same reference numerals, and redundant description will be omitted as appropriate.
  • the side portion 42 of the reflection sheet 40 is formed separately from the bottom portion 41. That is, in this 2nd Embodiment, the side part 42 and the bottom part 41 in the reflective sheet 40 are processed separately.
  • the side part 42 of the reflection sheet 40 and the bottom part 41 of the reflection sheet 40 may be formed (processed) using the same material, or may be formed (processed) using different materials. .
  • the side portion 42 of the reflection sheet 40 is easily formed into a desired shape by forming the side portion 42 of the reflection sheet 40 separately from the bottom portion 41. Can do. Therefore, by configuring in this way, it is possible to easily obtain the reflection sheet 40 that can reduce luminance unevenness.
  • FIG. 13 is a plan view schematically showing a part of the backlight unit according to the third embodiment of the present invention.
  • a reflective sheet and a backlight unit according to a third embodiment of the present invention will be described with reference to FIG.
  • corresponding components are denoted by the same reference numerals, and redundant description is omitted as appropriate.
  • the reflection sheet 40 of the backlight unit 50 a part of the side portion 42 on the side of the corner 43 is bent outward so that the reflection is reflected at each corner 43.
  • the side part 42 of the sheet 40 is formed so as to spread outward as seen in a plan view. That is, in this 3rd Embodiment, the center part of the side part 42 is formed in linear form, and the both ends of the center part are bent so that it may spread outside.
  • the side portions 42 of the reflection sheet 40 are formed in a polygonal shape so that a part of the side portions 42 spreads outward, whereby the corner portions 43 (four corners) and the corner portions of the reflection sheet 40 are formed.
  • the light incident on the side portion 42 can be reflected to the corner portion 43 side (white arrow R side in FIG. 13). That is, as in the first embodiment, light can be easily guided to the corner 43 side.
  • luminance in the corner 43 can be suppressed, a brightness nonuniformity can be reduced and the brightness
  • the side portion 42 of the reflection sheet 40 can also be formed separately from the bottom portion 41 in the third embodiment.
  • FIG. 14 is a plan view schematically showing a part of a backlight unit according to a modification of the third embodiment.
  • each side portion 42 of the reflection sheet 40 is formed in a more polygonal shape.
  • the side part 42 of the reflective sheet 40 is formed in the arch shape which protrudes inside, when it sees planarly.
  • FIG. 15 is a plan view schematically showing a part of the backlight unit according to the fourth embodiment of the present invention.
  • FIG. 16 is a schematic cross-sectional view along the line AA in FIG.
  • FIG. 17 is a schematic sectional view taken along line BB in FIG.
  • a reflection sheet 40 and a backlight unit according to a fourth embodiment of the invention will be described.
  • symbol is attached
  • the reflection sheet 40 of the backlight unit 50 is formed so that the center portion of the bottom portion 41 rises upward.
  • the bottom 41 of the reflection sheet 40 is an inclined surface slightly inclined with respect to the bottom surface 30 c of the backlight chassis 30.
  • the bottom 41 of the reflection sheet 40 by making the bottom 41 of the reflection sheet 40 an inclined surface (by forming the bottom 41 of the reflection sheet 40 so as to rise), the light reflected by the bottom 41 is side portions 42. It can be easily guided to the side (corner side). Thereby, luminance unevenness can be improved and it is possible to easily achieve uniform luminance.
  • the side portion 42 of the reflection sheet 40 can also be formed separately from the bottom portion 41 in the fourth embodiment.
  • the side portion 42 of the reflection sheet 40 can be polygonal.
  • the reflection sheet is formed by bending the resin sheet member
  • the present invention is not limited to this, and for example, the resin sheet
  • the reflective sheet may be formed by pressing or molding the member.
  • the reflection sheet is formed using a resin sheet member.
  • the present invention is not limited to this, and for example, high reflection You may form using the sheet
  • the said reflection sheet can also be formed by processing a plate-shaped member.
  • the reflection sheet may be formed (processed) using a plate-like member coated with a highly reflective paint or a metal plate having a highly reflective surface. That is, the reflection sheet may have a plate shape in addition to the sheet shape.
  • the side portion of the reflective sheet is formed using a sheet member.
  • the present invention is not limited to this, and the side portion is It can also be formed using a relatively thick member.
  • the side part 42 can also be comprised from the frame-shaped member 142 shape-molded with resin etc.
  • the inner surface (inner surface 42 a) of the frame-shaped member 142 is formed so as to spread outward at the corner 43 of the bottom 41.
  • the case where the inner surface 42a of the side portion 42 is formed so as to spread outward is also included in the configuration “the side portion is formed so as to spread outward” of the present invention.
  • FIG. 1 the case where the inner surface 42a of the side portion 42 is formed so as to spread outward is also included in the configuration “the side portion is formed so as to spread outward” of the present invention.
  • each side part 42 which comprises the frame-shaped member 142 may be formed integrally, and may be formed separately.
  • an LED is used as the light source of the backlight unit.
  • the present invention is not limited to this, and the light source of the backlight unit is not an LED.
  • the light source may be used.
  • a fluorescent lamp such as a cold cathode fluorescent lamp (CCFL) may be used as the light source of the backlight unit.
  • the said fluorescent lamp may be comprised using fluorescent tubes other than a cold cathode tube.
  • the side portions of the reflection sheet are formed so as to spread outward at the four corners of the reflection sheet, but the present invention is not limited thereto, and at least one of the four corner portions, You may form so that the side part of a reflective sheet may spread outside. However, as shown in the above-described embodiment, it is preferable to form the side portions so as to spread outward at the four corners of the reflection sheet, because the luminance can be more effectively uniformed.
  • the number of LED modules mounted and the number of LEDs mounted on the LED module are not limited to the configuration shown in the above embodiment, and can be changed as appropriate.
  • the type of LED is not particularly limited.
  • the LED may include a blue light emitting LED chip (light emitting chip) and a phosphor that receives light from the LED chip and fluoresces yellow light.
  • a blue light emitting LED chip light emitting chip
  • a phosphor that receives light from the LED chip and fluoresces yellow light.
  • Such an LED generates white light using light from a blue light emitting LED chip and light emitted from a fluorescent light.
  • the number of LED chips included in the LED is not particularly limited.
  • the phosphor incorporated in the LED is not limited to a phosphor that emits yellow light.
  • an LED includes a blue light emitting LED chip and a phosphor that emits green light and red light in response to light from the LED chip, and emits blue light and fluorescent light (green light) from the LED chip. , Red light) and white light can be used.
  • the LED chip built in the LED is not limited to the one emitting blue light.
  • the LED may include a red LED chip that emits red light, a blue LED chip that emits blue light, and a phosphor that emits green light by receiving light from the blue LED chip. With such an LED, white light can be generated by red light from the red LED chip, blue light from the blue LED chip, and green light that fluoresces.
  • the LED may be an LED that does not contain any phosphor.
  • a red LED chip that emits red light, a green LED chip that emits green light, and a blue LED chip that emits blue light are configured to generate white light by mixing light from all LED chips. Also good.
  • the backlight unit is configured to include a diffusion plate, a prism sheet, and a lens sheet as an optical member (optical sheet).
  • optical member optical sheet
  • the present invention is not limited to this, and the optical member (optical sheet) can be appropriately changed (added or deleted) as necessary.
  • the present invention is applied to a liquid crystal display device that is an example of a display device.
  • the present invention is not limited thereto, and the present invention is not limited to this.
  • the present invention can be applied to all non-light emitting display devices provided with a backlight unit for supplying light.
  • Liquid crystal display panel (display panel) DESCRIPTION OF SYMBOLS 11 Active matrix board

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne une feuille réfléchissante grâce à laquelle il est possible d'obtenir une luminosité uniforme en réduisant la non-uniformité de la luminosité. Cette feuille réfléchissante (40) comprend : une partie de base (41) ayant des parties de coin (43) ; et des parties latérales (42) disposées au niveau de la périphérie extérieure de la partie de base (41). Par ailleurs, les parties latérales (42) sont formées de manière à s'étendre vers l'extérieur au niveau des parties de coin (43) de la partie de base (41) (les parties de coin (43) de la feuille réfléchissante (40)).
PCT/JP2011/069720 2010-09-06 2011-08-31 Feuille réfléchissante, dispositif d'éclairage, et dispositif d'affichage Ceased WO2012032978A1 (fr)

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JP2013143218A (ja) * 2012-01-10 2013-07-22 Sharp Corp 照明装置、表示装置、及びテレビ受信装置
JP2014232659A (ja) * 2013-05-29 2014-12-11 三菱電機株式会社 照明器具
EP2821819A1 (fr) * 2013-07-01 2015-01-07 Samsung Electronics Co., Ltd Réflecteurs pour les coins d'un rétro-éclairage direct dans un dispositif d'affichage
JP2016062765A (ja) * 2014-09-18 2016-04-25 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置
KR20160046308A (ko) * 2014-10-20 2016-04-28 포세온 테크날러지 인코퍼레이티드 각면 반사기를 구비하는 조명 디바이스
JP2018125292A (ja) * 2018-02-21 2018-08-09 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置
US20230004047A1 (en) * 2021-06-30 2023-01-05 Lg Electronics Inc. Display device
CN116107015A (zh) * 2023-02-10 2023-05-12 上海天马微电子有限公司 导光板组件、背光模组及显示装置
WO2023109197A1 (fr) * 2021-12-13 2023-06-22 荣耀终端有限公司 Papier réfléchissant, module de rétroéclairage et dispositif d'affichage

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JP2013143218A (ja) * 2012-01-10 2013-07-22 Sharp Corp 照明装置、表示装置、及びテレビ受信装置
JP2014232659A (ja) * 2013-05-29 2014-12-11 三菱電機株式会社 照明器具
EP2821819A1 (fr) * 2013-07-01 2015-01-07 Samsung Electronics Co., Ltd Réflecteurs pour les coins d'un rétro-éclairage direct dans un dispositif d'affichage
KR20150003514A (ko) * 2013-07-01 2015-01-09 삼성전자주식회사 디스플레이 장치
KR102180687B1 (ko) 2013-07-01 2020-11-20 삼성전자주식회사 디스플레이 장치
US9335584B2 (en) 2013-07-01 2016-05-10 Samsung Electronics Co., Ltd. Display device
JP2016062765A (ja) * 2014-09-18 2016-04-25 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置
JP2016111340A (ja) * 2014-10-20 2016-06-20 フォセオン テクノロジー， インコーポレイテッドＰｈｏｓｅｏｎ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． ファセットリフレクタを備える照明装置
CN105605531A (zh) * 2014-10-20 2016-05-25 锋翔科技公司 照明设备和照明方法
KR20160046308A (ko) * 2014-10-20 2016-04-28 포세온 테크날러지 인코퍼레이티드 각면 반사기를 구비하는 조명 디바이스
KR102431565B1 (ko) * 2014-10-20 2022-08-17 포세온 테크날러지 인코퍼레이티드 각면 반사기를 구비하는 조명 디바이스
JP2018125292A (ja) * 2018-02-21 2018-08-09 シャープ株式会社 照明装置、表示装置、及びテレビ受信装置
US20230004047A1 (en) * 2021-06-30 2023-01-05 Lg Electronics Inc. Display device
US11796861B2 (en) * 2021-06-30 2023-10-24 Lg Electronics Inc. Display device
WO2023109197A1 (fr) * 2021-12-13 2023-06-22 荣耀终端有限公司 Papier réfléchissant, module de rétroéclairage et dispositif d'affichage
US12204205B2 (en) 2021-12-13 2025-01-21 Honor Device Co., Ltd. Reflective film, backlight module, and display apparatus
CN116107015A (zh) * 2023-02-10 2023-05-12 上海天马微电子有限公司 导光板组件、背光模组及显示装置

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