WO2017038519A1 - Dispositif lcd - Google Patents

Dispositif lcd Download PDF

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Publication number
WO2017038519A1
WO2017038519A1 PCT/JP2016/074320 JP2016074320W WO2017038519A1 WO 2017038519 A1 WO2017038519 A1 WO 2017038519A1 JP 2016074320 W JP2016074320 W JP 2016074320W WO 2017038519 A1 WO2017038519 A1 WO 2017038519A1
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WIPO (PCT)
Prior art keywords
liquid crystal
panel
display device
backlight
crystal display
Prior art date
Application number
PCT/JP2016/074320
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English (en)
Japanese (ja)
Inventor
台信　英樹
Original Assignee
シャープ株式会社
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Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2017038519A1 publication Critical patent/WO2017038519A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present invention relates to a liquid crystal display device. More specifically, the present invention relates to a liquid crystal display device suitable for a display device requiring a narrow frame.
  • the following techniques are disclosed as techniques relating to the fixing method of various members in the display device.
  • a display device having a display panel, a transparent front plate provided on the front side of the display panel, and an adhesive member provided between the display panel and the transparent front plate, wherein the transparent front plate is formed on the display panel only by the adhesive member
  • a fixed display device is disclosed (for example, refer to Patent Document 1).
  • a display panel a front member that is provided on the front surface of the display panel and covers at least the periphery of the display panel, a back member that is provided on the back surface of the display panel and covers at least the back surface of the display panel, and a back member and a front member And a bonding device that covers the outer peripheral portion of the display panel is disclosed (for example, see Patent Document 2).
  • the transparent body and the plate-like body are provided on the display panel.
  • Disclosed is a display device in which a flow-preventing member is installed in a plate-like body so that the second adhesive material does not enter the gap between the display panel and the plate-like body, and is bonded and fixed by a second adhesive material at an overlapping portion on the outside (For example, see Patent Document 3).
  • a photocurable resin composition is interposed between the image display unit and the display side panel having the frame and the protection unit so as to extend over the image display unit and the frame, and photocured to form a cured resin layer.
  • the photocurable resin composition is interposed between the display side panel and the protection portion.
  • a liquid crystal panel a light source unit that provides light to the liquid crystal panel, a light source unit coupled to one side and formed of a glass material, and at least one surface of one surface or the other surface of the light guide unit
  • a display device includes a reflection portion formed on the liquid crystal panel and an adhesive member that is applied to one surface of the light guide portion that faces the liquid crystal panel and couples the liquid crystal panel and the light guide portion (see, for example, Patent Document 5). .)
  • a liquid crystal display device comprising a liquid crystal display panel in which a pair of transparent substrates are disposed to face each other via a liquid crystal layer, and a backlight unit that is disposed on the back surface of the liquid crystal display panel and emits backlight light.
  • a liquid crystal display device has a plate-like member facing the side wall surface of the panel and the side wall surface of the backlight unit, and the plate-like member is fixed to the side wall surface of the liquid crystal display panel and the side wall surface of the backlight unit.
  • JP 2014-130194 A JP 2012-242805 A JP 2009-122655 A JP 2009-186156 A JP 2014-219655 A Japanese Patent Application Laid-Open No. 2014-126585
  • FIG. 26 is a schematic cross-sectional view of a liquid crystal display device according to Comparative Example 1 studied by the present inventors.
  • the liquid crystal display device according to the comparative example 1 includes a liquid crystal panel 110, a backlight 120 disposed behind the liquid crystal panel 110, and an adhesive member for fixing the liquid crystal panel 110 to the backlight 120. 130 (for example, double-sided tape).
  • the backlight 120 includes a reflection sheet (not shown), a light guide plate 121, an optical sheet 122 on the light guide plate 121, and a backlight case 123 that accommodates these.
  • the liquid crystal panel 110 is fixed to the backlight case 123 by the adhesive member 130.
  • the length of the adhesive member 130 is required to some extent, and the width of the frame area (image non-display area) 102 around the image display area 101 is increased. This hinders the narrowing of the frame of the liquid crystal display device according to the comparative example 1.
  • Patent Document 1 does not disclose a method of fixing the liquid crystal panel and the backlight.
  • the first adhesive is provided in the non-display area of the outer periphery of the display panel. Further, the outer frame member is screwed to the display panel holding member. Therefore, these become a bottleneck and there is a limit to narrowing the frame.
  • the spacer is arranged to define the formation region of the bonding portion.
  • the frame region corresponds to the size of the spacer. Will become bigger.
  • a flow prevention member such as an adhesive is disposed so that the second adhesive material does not enter the gap between the liquid crystal panel and the plate-like body.
  • the frame area becomes larger by that amount.
  • Patent Document 4 does not disclose a method of fixing the liquid crystal panel and the backlight, but discloses a method of fixing the protection unit to the display side panel. Moreover, if a sealing film is provided, a frame area will become large by the magnitude
  • the width of the adhesive member is required to some extent in order to maintain the adhesive force.
  • the frame area becomes larger by the size.
  • a plate-like member is fixed to the side wall surface of the liquid crystal display panel and the side wall surface of the mold member that surrounds the outer periphery of the light guide plate and the optical sheet, thereby making the liquid crystal display panel a backlight unit. It is fixed. Therefore, the frame area becomes larger by the size of the mold member.
  • the present invention has been made in view of the above-described present situation, and an object thereof is to provide a liquid crystal display device capable of narrowing the frame.
  • One embodiment of the present invention is a liquid crystal display device including a liquid crystal panel and a backlight
  • the liquid crystal panel includes an image display unit and a frame portion around the image display unit
  • the backlight includes an optical sheet located behind the liquid crystal panel, a light guide plate located behind the optical sheet, and a backlight case.
  • the backlight case is a box with an open surface on the viewer side, and includes a flat plate portion and a side wall portion rising from the flat plate portion, The optical sheet and the light guide plate are accommodated in the backlight case,
  • a panel holding part formed in a shape capable of fitting the frame part is provided, A liquid crystal display device in which the frame portion is fitted into the panel holding portion may be used.
  • this liquid crystal display device is also referred to as a first liquid crystal display device according to the present invention.
  • the first liquid crystal display device may further include an elastic buffer member between the liquid crystal panel and the backlight case.
  • the liquid crystal panel may be in contact with the optical sheet.
  • the panel holding part may include a linear ridge provided along the viewer side of the frame part.
  • the ridge portion is a first ridge portion
  • the panel holding portion includes a linear second ridge provided along the rear side of the frame portion,
  • a plurality of protrusions are provided on the frame side surface of each of the first and second ridges,
  • the frame portion may be supported by each vertex of the plurality of protrusions.
  • the panel holding portion includes a linear concave stripe portion provided along the frame portion,
  • the frame part may be fitted into the concave strip part.
  • a liquid crystal display device comprising a liquid crystal panel, a backlight, and a panel fixing member
  • the liquid crystal panel includes an image display unit and a frame portion around the image display unit
  • the backlight includes an optical sheet located behind the liquid crystal panel, a light guide plate located behind the optical sheet, and a backlight case.
  • the backlight case is a box with an open surface on the viewer side, and includes a flat plate portion and a side wall portion rising from the flat plate portion, The optical sheet and the light guide plate are accommodated in the backlight case
  • the panel fixing member includes a panel pressing portion that presses the frame portion, and is fixed to the backlight case.
  • the frame portion may be a liquid crystal display device that is sandwiched between the panel pressing portion and the side wall portion.
  • this liquid crystal display device is also referred to as a second liquid crystal display device according to the present invention.
  • the second liquid crystal display device further includes a buffer member having elasticity between the liquid crystal panel and the backlight case, and between the liquid crystal panel and the panel fixing member. Also good.
  • the liquid crystal panel may be in contact with the optical sheet.
  • Still another embodiment of the present invention is a liquid crystal display device including a liquid crystal panel, a backlight, and a bezel
  • the liquid crystal panel includes an image display unit and a frame portion around the image display unit
  • the backlight includes an optical sheet located behind the liquid crystal panel, a light guide plate located behind the optical sheet, and a backlight case.
  • the backlight case is a box with an open surface on the viewer side, and includes a flat plate portion and a side wall portion rising from the flat plate portion, The optical sheet and the light guide plate are accommodated in the backlight case
  • the bezel includes a panel holding portion formed in a shape capable of fitting the frame portion, The frame portion is fitted into the panel holding portion,
  • the bezel may be a liquid crystal display device fixed to the side wall portion.
  • this liquid crystal display device is also referred to as a third liquid crystal display device according to the present invention.
  • the bezel further includes a case fixing part connected to the panel holding part,
  • the case fixing part may be arranged along the side wall part and fixed to the side wall part.
  • the third liquid crystal display device further comprises an adhesive member,
  • the bezel may be disposed on the side wall portion and fixed to the side wall portion by the adhesive member.
  • the third liquid crystal display device according to the present invention may further include an elastic buffer member between the liquid crystal panel and the bezel.
  • the liquid crystal panel may be in contact with the optical sheet.
  • a liquid crystal display device capable of narrowing a frame can be realized.
  • FIG. 1 is a schematic plan view of a liquid crystal display device according to Embodiment 1.
  • FIG. FIG. 2 is a schematic cross-sectional view of the liquid crystal display device according to Embodiment 1, showing a cross section taken along line A1-A2 in FIG. It is a cross-sectional schematic diagram of the liquid crystal display device according to the first embodiment, and shows an enlarged portion including a panel holding portion and a frame portion.
  • FIG. 3 is a schematic cross-sectional view of the liquid crystal display device according to Embodiment 1, showing a cross section along line B1-B2 in FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of Embodiment 1.
  • FIG. 1 is a schematic plan view of a liquid crystal display device according to Embodiment 1.
  • FIG. FIG. 2 is a schematic cross-sectional view of the liquid crystal display device according to Embodiment 1, showing a cross section taken along line A1-A2 in FIG. It is a cross
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a second modification example of Embodiment 1, and shows a cross section taken along line C1-C2 in FIG.
  • FIG. 10 is a schematic cross-sectional schematic diagram of the liquid crystal display device which concerns on the 3rd modification of Embodiment 1, and expands and shows the part containing a panel holding
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a second modification example of Embodiment 1, and shows a cross section taken along line C1-C2 in FIG.
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of Embodiment 1, and shows a cross section taken along line D1-D2 in FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to a fourth modification of Embodiment 1.
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a fifth modification of Embodiment 1.
  • FIG. 7 is a schematic cross-sectional view of a liquid crystal display device according to a sixth modification of Embodiment 1.
  • FIG. FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a seventh modification example of Embodiment 1.
  • FIG. 12 is a schematic cross-sectional view of a liquid crystal display device according to an eighth modification of Embodiment 1.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 2.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of Embodiment 2.
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a second modification example of Embodiment 2.
  • 12 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of Embodiment 2.
  • FIG. 12 is a schematic cross-sectional view of a liquid crystal display device according to a fourth modification of Embodiment 2.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 2.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 3.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of Embodiment 3.
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a second modification example of Embodiment 3.
  • 12 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of Embodiment 3.
  • FIG. 12 is a schematic cross-sectional view of a liquid crystal display device according to a fourth modification of Embodiment 3.
  • FIG. FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a fifth modification example of Embodiment 3. It is a cross-sectional schematic diagram of the liquid crystal display device which concerns on the comparative form 1 which this inventor examined.
  • FIG. 1 is a schematic plan view of the liquid crystal display device according to the first embodiment.
  • the liquid crystal display device 100 according to the first embodiment includes a liquid crystal panel 10 and has an image display region 1 having an arbitrary shape.
  • the planar shapes of the external shapes of the liquid crystal display device 100 and the liquid crystal panel 10 are designed to be substantially the same as the image display region 1.
  • the liquid crystal display device 100 may be a free-form display (FFD) in which the shapes of the image display area 1 and the liquid crystal panel 10 are shapes other than a rectangle and a square.
  • the display whose each shape of the liquid crystal panel 10 is a rectangle or a square may be sufficient.
  • FFD free-form display
  • These shapes are not particularly limited, and may be, for example, a shape in which two adjacent corners of a rectangle are rounded as shown in FIG. 1, a rectangle, a square, a circle or an ellipse, or other complex shapes.
  • the image display area 1 is an area where an image is displayed (active area), and a frame area (image non-display area) 2 where no image is displayed is provided around the image display area 1.
  • the liquid crystal panel 10 includes an image display unit 11 corresponding to the image display region 1 and a frame portion (image display unit) 12 corresponding to the frame region 2.
  • the image display unit 11 is provided with a plurality of pixels (not shown) in a matrix.
  • the frame portion 12 is provided in a frame shape so as to surround the image display portion 11, and the frame portion 12 is provided with a member such as a seal material (not shown).
  • the liquid crystal display device 100 further includes a backlight 20 that is disposed so as to overlap the liquid crystal panel 10 and has substantially the same planar shape as the liquid crystal panel 10.
  • the liquid crystal display device 100 includes various general circuits and electronic components in addition to these members.
  • the liquid crystal panel 10 includes, for example, a TFT substrate (not shown), a CF substrate (not shown) facing the TFT substrate, and a liquid crystal layer (not shown) provided between these two substrates. have.
  • a polarizing plate that transmits polarized light in a specific direction is provided on the surface of each substrate opposite to the liquid crystal layer.
  • the backlight 20 includes a flat light guide plate 21, a light source (not shown) such as an LED arranged to face one side of the light guide plate 21, and the back surface of the light guide plate 21.
  • a reflection portion (not shown) such as a reflection sheet, an optical sheet 22 on the light guide plate 21, and a backlight case 23 for housing these.
  • Each of the light guide plate 21, the light source, the reflection part, and the optical sheet 22 has the same function and structure as a general one.
  • Specific examples of the optical sheet 22 include sheets such as a prism sheet and a diffusion sheet, and a plurality of these sheets may be arranged as the optical sheet 22.
  • the backlight case 23 is formed in a flat box shape having an opening on the viewer side, and includes a flat plate portion 24 on the back side, a side wall portion 25 rising vertically from the peripheral edge of the flat plate portion 24, and an observer. Side opening 26.
  • the side wall portion 25 is provided so as to surround the flat plate portion 24, and the light source, the reflection portion, the light guide plate 21, and the optical sheet 22 are arranged in a space formed by the flat plate portion 24 and the side wall portion 25.
  • the flat plate portion 24 and the side wall portion 25 are not provided with openings such as through holes and cuts, respectively, thereby suppressing the deformation of the backlight 20 and preventing foreign matters such as dust in the backlight case 23. Preventing intrusion.
  • the material of the backlight case 23 examples include metal, resin, and the like.
  • the backlight case 23 is formed by a method such as cutting and die casting.
  • the backlight case 23 is formed by a general molding method. 23 can be produced. According to these methods, all the parts such as the side wall portion 25 of the backlight case 23 can be integrally formed.
  • the backlight case 23 may include a portion formed from a metal (for example, a sheet metal) and a portion formed from a resin, and such a backlight case 23 is formed by a method such as outsert molding. Can be produced.
  • the liquid crystal panel 10 is fitted into the opening 26 (the surface on the opened observer side) of the backlight case 23 so as to cover each member in the backlight case 23.
  • Each side surface (end surface) of the panel 10 faces the inner wall (inner side) 25 a of the side wall portion 25.
  • a panel holding portion 27 formed in a shape capable of fitting the frame portion 12 of the liquid crystal panel 10 is provided on the entire circumference of the inner wall 25 a of the side wall portion 25.
  • the liquid crystal panel 10 is held and fixed to the backlight case 23 by fitting the frame portion 12 into the panel holding portion 27.
  • the panel holding part 27 is preferably located at the end of the side wall part 25 (the part farthest from the flat plate part 24).
  • the panel holding portion 27 includes two rows of protruding ridge portions 28a and 28b formed in a straight line in parallel with each other at a predetermined interval, and a frame portion is formed in a gap between the protruding ridge portions 28a and 28b. 12 is fitted. Accordingly, the ridge 28a (corresponding to the first ridge) and the ridge 28b (corresponding to the second ridge) are respectively the observer side (front surface) and the rear side of the frame portion 12. It extends along (the back).
  • the interval between the ridges 28 a and 28 b is set to be approximately the same as the thickness of the frame portion 12.
  • the width of each protrusion 28a, 28b is not particularly limited as long as each protrusion 28a, 28b is arranged in the frame area 2 without interfering with the image display area 1, and can be set as appropriate. It is.
  • FIG. 3 is a schematic cross-sectional view of the liquid crystal display device according to Embodiment 1, and shows an enlarged portion including a panel holding portion and a frame portion.
  • 4 is a schematic cross-sectional view of the liquid crystal display device according to Embodiment 1, and shows a cross section taken along line B1-B2 in FIG.
  • the surface on the side of the frame portion 12 of each ridge 28a, 28b is flat, and these flat surfaces support the frame portion 12 as shown in FIGS. That is, the panel holding part 27 is applied to the frame part 12 in a plane (flat surface).
  • the panel holding portion 27 is provided on the entire periphery of the liquid crystal panel 10.
  • the liquid crystal panel 10 has four straight side surfaces and two arc-shaped side surfaces, but the panel holding portion 27 extends along the entire side surfaces. It is preferable to be arranged.
  • the arrangement location of the panel holding part 27 is not particularly limited.
  • the plurality of panel holding portions 27 are disposed at a plurality of locations around the liquid crystal panel 10. The plurality of panel holding portions 27 may be provided evenly around the liquid crystal panel 10.
  • the liquid crystal display device 100 of the present embodiment includes the liquid crystal panel 10 and the backlight 20, and the liquid crystal panel 10 includes the image display unit 11 and the frame around the image display unit 11.
  • the backlight 20 includes an optical sheet 22 positioned behind the liquid crystal panel 10, a light guide plate 21 positioned behind the optical sheet 22, and a backlight case 23.
  • the light case 23 is a box having an opening on the viewer side, and includes a flat plate portion 24 and a side wall portion 25 rising from the flat plate portion 24.
  • the optical sheet 22 and the light guide plate 21 include a backlight.
  • a panel holding portion 27 formed in a shape in which the frame portion 12 can be fitted is provided on the inner wall 25 a of the side wall portion 25, which is accommodated in the case 23. Edge 12 is fitted.
  • the inner wall 25a of the side wall portion 25 is provided with the panel holding portion 27 formed in a shape capable of fitting the frame portion 12, and the frame portion 12 is fitted into the panel holding portion 27.
  • the width of the frame region 2 of the liquid crystal display device 100 is the sum of the plate thickness of the side wall portion 25 of the backlight case 23 and the width of the frame portion 12 of the liquid crystal panel 10. Therefore, dramatic narrowing of the frame, that is, dramatic reduction of the width of the frame area (image non-display area) 2 is possible. Further, the liquid crystal panel 10 can be firmly fixed to the backlight case 23.
  • the spacer is disposed to partition the formation region of the bonding portion, but the material of the bonding portion (adhesive) ) Is filled in the partition region so as to come into contact with the outer peripheral portion of the back member, the front member, and the display panel, so that the adhesive may enter the spacer and come into contact with the optical sheet and the light guide plate.
  • the adhesive when the adhesive penetrates between the light guide plate and the optical sheet and reaches the display area due to capillary action, luminance unevenness occurs on the light emitting surface of the backlight, and as a result, display unevenness occurs on the display surface of the display device. It will occur.
  • the adhesive may enter between adjacent optical sheets. Further, outgas is generated from the adhesive, and the metal part may be corroded.
  • a flow-preventing member such as an adhesive is disposed so that the second adhesive material does not enter the gap between the liquid crystal panel and the plate-like body. It cannot be said that there is no possibility of the second adhesive material intruding inside. In that case, as in the case described above, luminance unevenness and display unevenness occur. Further, outgas is generated from the second adhesive material, and the metal part may be corroded.
  • FIG. 5 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of the first embodiment.
  • the shape of the panel holding part 27 is not particularly limited as long as the frame part 12 of the liquid crystal panel 10 can be fitted.
  • the panel holding part 27 may include a row of concave line parts 29 formed linearly along the frame part 12, and the frame part 12 is included in the concave line part 29. May be fitted. According to this structure, even when the frame portion 12 is very narrow, the frame portion 12 can be held by the panel holding portion 27. Therefore, the frame region 2 is made narrower than the structure described with reference to FIG. It is possible.
  • the width of the concave stripe portion 29 in the depth direction (thickness direction) of the backlight 20 is set to be substantially the same as the thickness of the frame portion 12.
  • the depth of the concave portion 29 is not particularly limited as long as the side wall portion 25 is disposed in the frame region 2 without interfering with the image display region 1, and can be set as appropriate.
  • the shape of the portion in which the frame portion 12 of the panel holding portion 27 is fitted closely matches the shape of the frame portion 12, and the space between the panel holding portion 27 and the frame portion 12 is the same. Although no gap was provided, the gap may be partially provided between the panel holding portion 27 and the frame portion 12.
  • the flat portion (flat surface) of the panel holding portion 27 is applied to the frame portion 12.
  • the panel holding portion 27 is framed by a dotted or linear portion. It may be applied to part 12.
  • a line or Point contact is preferred. An example is shown below.
  • FIG. 6 is a schematic cross-sectional view of a liquid crystal display device according to a second modification of the first embodiment, and shows an enlarged portion including a panel holding portion and a frame portion.
  • FIG. 7 is a schematic cross-sectional view of a liquid crystal display device according to a second modification of the first embodiment, and shows a cross section taken along line C1-C2 in FIG.
  • a plurality of protrusions 30 may be provided on the surface of the ridges 28 a and 28 b on the frame part 12 side.
  • the frame portion 12 may be supported.
  • each protrusion 30 is not particularly limited, and examples thereof include a hemispherical shape, an elliptical spherical shape, and a conical shape in addition to a spherical crown shape as shown in FIGS.
  • FIG. 8 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of Embodiment 1, and shows an enlarged portion including a panel holding portion and a frame portion.
  • FIG. 9 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of Embodiment 1, and shows a cross section taken along line D1-D2 in FIG.
  • a plurality of ridges 32 may be provided on the surface of the ridges 28 a and 28 b on the frame part 12 side, and each ridge line part of these ridges 32 is provided.
  • the frame portion 12 may be supported by 33.
  • the linear portion of the panel holding portion 27 (the ridge line portion 33 of each of the ridge portions 28a and 28b) may be applied to the frame portion 12.
  • Two adjacent ridge portions 32 are arranged without a gap, and the ridge line portion 33 of each ridge portion 32 extends in a direction intersecting with the side wall portion 25, for example, in a direction orthogonal to the side wall portion 25.
  • the shape of each ridge portion 32 is not particularly limited, and examples thereof include a triangular shape in cross section as shown in FIGS.
  • FIG. 10 is a schematic cross-sectional view of a liquid crystal display device according to a fourth modification of the first embodiment.
  • an elastic buffer member 3 may be disposed between the liquid crystal panel 10 and the backlight case 23, more specifically, between the frame portion 12 and the panel holding portion 27.
  • the display performance of the liquid crystal panel 10 may be deteriorated due to the stress transmitted from the backlight case 23 to the liquid crystal panel 10.
  • the elastic buffer member 3 between the liquid crystal panel 10 and the backlight case 23, it is possible to prevent such deterioration in display performance.
  • the material of the elastic buffer member 3 is not particularly limited, and examples thereof include elastomers such as rubber.
  • FIGS. 11 and 12 are schematic cross-sectional views of liquid crystal display devices according to fifth and sixth modifications of Embodiment 1, respectively.
  • the liquid crystal panel 10 may be disposed so as not to generate a gap with the optical sheet 22, or may be in contact with the entire optical sheet 22.
  • the liquid crystal panel 10 is in contact with the optical sheet 22, so that the liquid crystal panel 10 can be prevented from entering more than necessary in the depth direction of the backlight 20.
  • the panel holding portion 27 may not include the protruding strip portion 28b but may include the protruding strip portion 28a.
  • the frame part 12 may be engage
  • the liquid crystal panel 10 is held by the backlight 20 by the frame portion 12 of the liquid crystal panel 10 disposed on the optical sheet 22 being pressed from the observer side by the ridge 28a.
  • the width of the ridge 28a is not particularly limited as long as the ridge 28 is arranged in the frame area 2 without interfering with the image display area 1, and can be set as appropriate.
  • the panel holding portion 27 includes a straight protruding portion 28 a provided along the observer side (front surface) of the frame portion 12, thereby providing a protruding portion 28 a and a side wall.
  • the frame portion 12 can be shielded integrally with the portion 25. Therefore, it is possible to effectively prevent light leakage in the frame region 2.
  • FIGS. 13 and 14 are schematic cross-sectional views of liquid crystal display devices according to seventh and eighth modifications of Embodiment 1, respectively. As shown in FIGS. 13 and 14, even when the liquid crystal panel 10 is in contact with the optical sheet 22, between the liquid crystal panel 10 and the backlight case 23, more specifically, between the frame portion 12 and the panel holding portion 27.
  • the buffer member 3 having elasticity may be disposed.
  • Embodiment 2 In the present embodiment, features unique to the present embodiment will be mainly described, and the description overlapping with the first embodiment will be omitted. Moreover, in this embodiment and Embodiment 1, the same code
  • the present embodiment is substantially the same as the first embodiment except for the points described below.
  • FIG. 15 is a schematic cross-sectional view of the liquid crystal display device according to the second embodiment.
  • the liquid crystal display device 200 according to the present embodiment further includes a panel fixing member 40 that fixes the liquid crystal panel 10 to the backlight case 23.
  • the liquid crystal panel 10 is not placed on the inner wall 25a of the side wall portion 25 of the backlight case 23, but the liquid crystal panel 10 is disposed on the end portion (the portion farthest from the flat plate portion 24) of the side wall portion 25.
  • the frame portion 12 of the liquid crystal panel 10 is disposed on the end surface (the upper surface, the surface farthest from the flat plate portion 24) of the side wall portion 25.
  • the panel fixing member 40 is being fixed to the backlight case 23 in the state which pressed down the frame part 12 with the panel fixing member 40 from the observer side.
  • the liquid crystal panel 10 is held and fixed to the backlight case 23 by sandwiching the frame portion 12 by the panel fixing member 40 and the side wall portion 25.
  • the arrangement location of the panel fixing member 40 is not particularly limited, but from the viewpoint of fixing the liquid crystal panel 10 to the backlight 20 more firmly, the panel fixing member 40 is preferably arranged around the entire periphery of the liquid crystal panel 10. .
  • the liquid crystal panel 10 has four linear side surfaces and two arc-shaped side surfaces, but the panel fixing member 40 is opposed to each of these side surfaces. It is preferable to be arranged as follows.
  • one integrally formed frame-shaped panel fixing member 40 may be disposed, or each is formed so as to be adapted to a corresponding portion.
  • a plurality of panel fixing members 40 may be used in combination.
  • a plurality of panel fixing members 40 are provided at a plurality of locations around the liquid crystal panel 10. May be provided apart from each other, or the plurality of panel fixing members 40 may be equally arranged around the liquid crystal panel 10.
  • the panel fixing member 40 is formed of a metal plate by a method such as press working, for example, and is connected to the panel pressing portion 41 that presses the frame portion 12 from the observer side and the panel pressing portion 41, and is connected to the backlight case 23. And a fixed case fixing portion 42.
  • the panel pressing portion 41 is provided along the surface on the viewer side of the frame portion 12 of the liquid crystal panel 10, and the case fixing portion 42 is provided along the outer wall (outer side) of the backlight case 23.
  • fixed part 42 is not specifically limited, For example, an adhesive member, screwing, claw fitting etc. are mentioned.
  • the panel fixing member 40 is a substantially L-shaped member in cross section, and the panel pressing portion 41 and the case fixing portion 42 are each plate-shaped, and the case fixing portion 42 is connected to the end of the panel pressing portion 41. ing. Further, the panel pressing portion 41 is formed to have an angle of about 90 ° with respect to the case fixing portion 42.
  • the panel fixing member 40 is arranged so that the panel pressing portion 41 is along the viewer side surface of the frame portion 12 of the liquid crystal panel 10 and the case fixing portion 42 is along the outer wall of the side wall portion 25 of the backlight case 23. Has been.
  • the case fixing portion 42 is fixed to the outer wall of the side wall portion 25 of the backlight case 23 with the panel pressing portion 41 in contact with the frame portion 12.
  • FIG. 16 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of the second embodiment.
  • the shape of the panel fixing member 40 is not particularly limited to the shape shown in FIG.
  • the panel fixing member 40 may have a substantially U shape (U shape) in cross section.
  • the case fixing portion 42 is substantially L-shaped in cross-section and includes plate-like first and second portions 42a and 42b, respectively, and one end of the first portion 42a is at the end of the panel pressing portion 41. The other end of the first portion 42a is connected to the end of the second portion 42b.
  • the panel pressing portion 41 and the second portion 42b are each formed to have an angle of approximately 90 ° with respect to the first portion 42a.
  • the panel pressing portion 41 is along the viewer side surface of the frame portion 12 of the liquid crystal panel 10
  • the first portion 42a of the case fixing portion 42 is along the outer wall of the side wall portion 25 of the backlight case 23
  • the second portion 42 b of the case fixing portion 42 is arranged along the outer wall of the flat plate portion 24 of the backlight case 23.
  • the panel fixing member 40 is fixed to the backlight case 23 with the panel pressing portion 41 in contact with the frame portion 12.
  • the fixing means of the panel fixing member 40 is not specifically limited, For example, an adhesive member, screwing, claw fitting, etc. are mentioned. The location of these fixing means is not particularly limited and can be set as appropriate.
  • the panel fixing member 40 may be attached so as to sandwich the liquid crystal panel 10 and the backlight case 23 by the panel pressing portion 41 and the second portion 42b, and the panel fixing member 40 may be fixed to the backlight case 23 by the sandwiching force. .
  • the liquid crystal display device 200 when the liquid crystal display device 200 is incorporated into another system, the liquid crystal display device 200 may be selected depending on whether a flat surface having a certain area is required for the entire back surface or the side surface of the backlight case 23.
  • the liquid crystal display device 200 of the present embodiment includes the liquid crystal panel 10, the backlight 20, and the panel fixing member 40.
  • the liquid crystal panel 10 includes the image display unit 11 and the image display unit.
  • the backlight 20 includes an optical sheet 22 positioned behind the liquid crystal panel 10, a light guide plate 21 positioned behind the optical sheet 22, and a backlight case 23.
  • the backlight case 23 is a box having an opening on the viewer side, and includes a flat plate portion 24 and a side wall portion 25 rising from the flat plate portion 24.
  • the optical sheet 22 and the light guide plate 21 is housed in the backlight case 23, and the panel fixing member 40 includes a panel pressing portion 41 that presses the frame portion 12. Are constant, the frame portion 12 is clamped to the panel pressing portions 41 and the side wall portion 25.
  • the panel fixing member 40 includes the panel pressing portion 41 that presses the frame portion 12 and is fixed to the backlight case 23, and the frame portion 12 is attached to the panel pressing portion 41 and the side wall portion 25. Since it is sandwiched, the width of the frame region 2 of the liquid crystal display device 200 is the sum of the plate thickness of the panel fixing member 40 and the width of the frame portion 12 of the liquid crystal panel 10. Therefore, dramatic narrowing of the frame, that is, dramatic reduction of the frame area (image non-display area) 2 is possible. Further, the liquid crystal panel 10 can be firmly fixed to the backlight case 23.
  • FIG. 17 is a schematic cross-sectional view of a liquid crystal display device according to a second modification of the second embodiment.
  • the liquid crystal panel 10 and the backlight case 23 more specifically, between the frame portion 12 and the side wall portion 25
  • a shock-absorbing member 3 may be disposed.
  • the display performance of the liquid crystal panel 10 may be deteriorated due to the stress transmitted from the backlight case 23 or the panel fixing member 40 to the liquid crystal panel 10.
  • the elastic buffer member 3 between the liquid crystal panel 10 and the backlight case 23 and between the liquid crystal panel 10 and the panel fixing member 40, such deterioration in display performance can be prevented. Can do.
  • FIG. 18 is a schematic cross-sectional view of a liquid crystal display device according to a third modification of the second embodiment. As shown in FIG. 18, the liquid crystal panel 10 may be disposed so as not to generate a gap with the optical sheet 22, or may be in contact with the entire optical sheet 22.
  • the liquid crystal panel 10 is in contact with the optical sheet 22, so that the liquid crystal panel 10 can be prevented from entering more than necessary in the depth direction of the backlight 20.
  • FIG. 19 is a schematic cross-sectional view of a liquid crystal display device according to a fourth modification of the second embodiment. As shown in FIG. 19, even when the liquid crystal panel 10 is in contact with the optical sheet 22, between the liquid crystal panel 10 and the backlight case 23 (more specifically, between the frame portion 12 and the side wall portion 25) and the liquid crystal panel. Between 10 and the panel fixing member 40, the buffer member 3 which has elasticity may be arranged.
  • FIG. 20 is a schematic cross-sectional view of the liquid crystal display device according to the third embodiment.
  • the liquid crystal display device 300 according to the present embodiment further includes a bezel 50 that holds the liquid crystal panel 10.
  • the liquid crystal panel 10 is not fitted into the inner wall 25a of the side wall portion 25 of the backlight case 23, but the frame portion 12 of the liquid crystal panel 10 is held by the bezel 50, and the bezel 50 is held by the backlight case 23. It is fixed to. In this way, the liquid crystal panel 10 is held and fixed to the backlight case 23.
  • the bezel 50 is a frame-like member having an opening including at least an area including the image display area 1, and is surrounded by the frame portion 12 of the liquid crystal panel 10 so as not to interfere with the image display area 1.
  • the bezel 50 is usually arranged so as to surround the entire frame portion 12 of the liquid crystal panel 10, but the location of the bezel 50 is not particularly limited, and the bezel 50 is arranged only in a part around the liquid crystal panel 10. May be.
  • the bezel 50 includes a panel holding portion 51 formed in a shape that allows the frame portion 12 to be fitted therein.
  • the frame portion 12 is fitted into the panel holding portion 51.
  • the shape that can fit the frame portion 12 may be the same as the shape described in the first embodiment. That is, the shape of the portion of the panel holding portion 51 into which the frame portion 12 is fitted may exactly match the shape of the frame portion 12, and a gap is partially provided between the panel holding portion 51 and the frame portion 12. It may be done.
  • maintenance part 51 may be applied to the frame part 12, and the panel holding part 51 may be applied to the frame part 12 by a dotted
  • the panel holding part 51 includes two rows of protruding ridges 53a and 53b formed in a straight line in parallel with each other at a predetermined interval, and in the gap between these protruding ridges 53a and 53b.
  • a frame portion 12 is fitted.
  • the ridges 53a and 53b extend along the observer side (front surface) and the rear side (back surface) of the frame portion 12, respectively.
  • the interval between the ridges 53 a and 53 b is set to be substantially the same as the thickness of the frame portion 12.
  • the widths of the ridges 53a and 53b are not particularly limited as long as the ridges 53a and 53b are arranged in the frame area 2 without interfering with the image display area 1, and can be set as appropriate. It is.
  • the bezel 50 further includes a plate-like case fixing portion 52 connected to the panel holding portion 51.
  • the bezel 50 is fitted into the backlight case 23 so that the case fixing portion 52 is along the outer wall of the side wall portion 25 of the backlight case 23.
  • the case fixing part 52 is fixed to the backlight case 23.
  • the fixing means of the case fixing part 52 is not particularly limited, and examples thereof include an adhesive member, screwing, and claw fitting.
  • the panel holding portion 51 abuts on an end portion (a portion farthest from the flat plate portion 24) of the side wall portion 25 of the backlight case 23, more specifically, an end surface (an upper surface, a surface farthest from the flat plate portion 24) of the side wall portion 25.
  • the bezel 50 is formed from a resin by a general molding method, and all parts such as the panel holding portion 51 of the bezel 50 are integrally formed.
  • FIG. 21 is a schematic cross-sectional view of a liquid crystal display device according to a first modification of the third embodiment.
  • the method for fixing the bezel 50 is not particularly limited to the method shown in FIG.
  • the case fixing part 52 may not be provided.
  • the panel holding portion 51 of the bezel 50 is disposed on the end portion of the side wall portion 25, more specifically, on the end surface of the side wall portion 25.
  • the liquid crystal panel 10 is fixed to the backlight case 23 by an adhesive member 4 such as an adhesive tape.
  • the liquid crystal display device 300 of this embodiment includes the liquid crystal panel 10, the backlight 20, and the bezel 50, and the liquid crystal panel 10 includes the image display unit 11 and the image display unit 11.
  • the backlight 20 includes an optical sheet 22 positioned behind the liquid crystal panel 10, a light guide plate 21 positioned behind the optical sheet 22, and a backlight case 23.
  • the backlight case 23 is a box having an opening on the viewer side, and includes a flat plate portion 24 and a side wall portion 25 rising from the flat plate portion 24.
  • the optical sheet 22 and the light guide plate 21 are
  • the bezel 50 is housed in the backlight case 23, and the bezel 50 includes a panel holding portion 51 formed into a shape that allows the frame portion 12 to be fitted therein. Is fitted to 51, the bezel 50 is fixed to 25 the side wall portion.
  • the bezel 50 includes the panel holding portion 51 formed in a shape in which the frame portion 12 can be fitted.
  • the frame portion 12 is fitted into the panel holding portion 51, and the bezel 50 has 25 side walls. Therefore, the width of the frame area 2 of the liquid crystal display device 300 is the sum of the plate thickness of the bezel 50 and the width of the frame portion 12 of the liquid crystal panel 10. Therefore, dramatic narrowing of the frame, that is, dramatic reduction of the frame area (image non-display area) 2 is possible. Further, the liquid crystal panel 10 can be firmly fixed to the backlight case 23.
  • FIGS. 22 and 23 are schematic cross-sectional views of liquid crystal display devices according to second and third modifications of Embodiment 3, respectively.
  • an elastic buffer member 3 may be disposed between the liquid crystal panel 10 and the bezel 50, more specifically, between the frame portion 12 and the panel holding portion 51.
  • the display performance of the liquid crystal panel 10 may be deteriorated due to a stress transmitted to the liquid crystal panel 10 from the outside.
  • the buffer member 3 having elasticity between the liquid crystal panel 10 and the bezel 50 it is possible to prevent such deterioration in display performance.
  • FIGS. 24 and 25 are schematic cross-sectional views of liquid crystal display devices according to fourth and fifth modifications of Embodiment 3, respectively. As shown in FIGS. 24 and 25, the liquid crystal panel 10 may be disposed so as not to generate a gap with the optical sheet 22, or may be in contact with the entire optical sheet 22.
  • the liquid crystal panel 10 is in contact with the optical sheet 22, so that the liquid crystal panel 10 can be prevented from entering more than necessary in the depth direction of the backlight 20.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention concerne un dispositif LCD permettant de diminuer l'épaisseur d'un cadre. La présente invention concerne un dispositif LCD comportant un panneau à cristaux liquides et un module de rétroéclairage, le dispositif LCD comprenant une unité d'affichage d'image et une section de cadre autour de l'unité d'affichage d'image; le module de rétroéclairage comportant une feuille optique positionnée à l'arrière du panneau à cristaux liquides, une plaque de guidage de lumière positionnée à l'arrière de la feuille optique, et un boîtier de rétroéclairage; le boîtier de rétroéclairage étant un boîtier dont le plan est ouvert du côté observateur et comprenant une section de plaque plate et des sections de paroi latérale qui sont érigées verticalement à partir de la section de plaque plate; et la feuille optique et la plaque de guidage de lumière étant logées dans le boîtier de rétroéclairage, une section de maintien de panneau conçue avec une forme qui permet un ajustement et une introduction de la section de cadre étant disposée sur les parois intérieures des sections de paroi latérale, et la section de cadre étant ajustée et introduite dans la section de maintien de panneau.
PCT/JP2016/074320 2015-08-28 2016-08-22 Dispositif lcd WO2017038519A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-169209 2015-08-28
JP2015169209 2015-08-28

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541939U (ja) * 1991-11-13 1993-06-08 ジエコー株式会社 フラツトデイスプレイ装置
JPH10123514A (ja) * 1996-10-21 1998-05-15 Hitachi Ltd 液晶表示装置
JP2006235092A (ja) * 2005-02-23 2006-09-07 Seiko Instruments Inc 表示装置
JP2009020430A (ja) * 2007-07-13 2009-01-29 Nippon Seiki Co Ltd 表示装置
WO2011148656A1 (fr) * 2010-05-28 2011-12-01 シャープ株式会社 Dispositif d'affichage
WO2013094507A1 (fr) * 2011-12-20 2013-06-27 シャープ株式会社 Dispositif d'affichage et dispositif de réception de télévision

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0541939U (ja) * 1991-11-13 1993-06-08 ジエコー株式会社 フラツトデイスプレイ装置
JPH10123514A (ja) * 1996-10-21 1998-05-15 Hitachi Ltd 液晶表示装置
JP2006235092A (ja) * 2005-02-23 2006-09-07 Seiko Instruments Inc 表示装置
JP2009020430A (ja) * 2007-07-13 2009-01-29 Nippon Seiki Co Ltd 表示装置
WO2011148656A1 (fr) * 2010-05-28 2011-12-01 シャープ株式会社 Dispositif d'affichage
WO2013094507A1 (fr) * 2011-12-20 2013-06-27 シャープ株式会社 Dispositif d'affichage et dispositif de réception de télévision

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