WO2019198376A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2019198376A1
WO2019198376A1 PCT/JP2019/007949 JP2019007949W WO2019198376A1 WO 2019198376 A1 WO2019198376 A1 WO 2019198376A1 JP 2019007949 W JP2019007949 W JP 2019007949W WO 2019198376 A1 WO2019198376 A1 WO 2019198376A1
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WIPO (PCT)
Prior art keywords
protrusion
liquid crystal
protrusions
substrate
sealing material
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PCT/JP2019/007949
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English (en)
Japanese (ja)
Inventor
順子 長澤
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株式会社ジャパンディスプレイ
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Publication of WO2019198376A1 publication Critical patent/WO2019198376A1/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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells

Definitions

  • Embodiments of the present invention relate to a liquid crystal display device.
  • the liquid crystal display device includes an array substrate, a counter substrate facing the array substrate, and a liquid crystal layer between the substrates.
  • the array substrate and the counter substrate are bonded to each other by a sealing material arranged in a frame shape in the peripheral region surrounding the display region.
  • This disclosure is intended to provide a liquid crystal display device with improved adhesion of a sealing material.
  • a liquid crystal display device includes a first substrate and a second substrate each having a display region and a peripheral region around the display region, and a sealing material for bonding the first substrate and the second substrate in the peripheral region.
  • the plurality of protrusions include a first protrusion that overlaps the sealing material in plan view, and a second protrusion that is disposed in the display area.
  • the width of the tip portion of the first protrusion is smaller than the width of the tip portion of the second protrusion and is less than 10 ⁇ m.
  • FIG. 1 is a schematic plan view of the liquid crystal display device according to the first embodiment.
  • FIG. 2 is a diagram illustrating a configuration of a display panel related to image display.
  • FIG. 3 is a schematic cross-sectional view of the display panel.
  • FIG. 4 is a cross-sectional view schematically showing the structure of the liquid crystal display device in the vicinity of the end portion.
  • FIG. 5 is a cross-sectional view showing the structure of the display panel in the vicinity of the end portion in more detail.
  • FIG. 6 is a cross-sectional view showing a more specific shape of the protrusion.
  • FIG. 7 is a graph obtained by measuring the amount of plastic deformation of the protrusions.
  • FIG. 8 is a schematic plan view showing a plurality of protrusions in the vicinity of the end portion.
  • FIG. 9 is a plan view of a display panel according to a modification.
  • FIG. 10 is a schematic cross-sectional view of a display panel according to the second embodiment.
  • ⁇ includes A, B or C
  • ⁇ includes any of A, B and C
  • ⁇ includes one selected from the group consisting of A, B and C
  • the expression “does not exclude the case where ⁇ includes a plurality of combinations of A to C unless otherwise specified. Furthermore, these expressions do not exclude the case where ⁇ includes other elements.
  • first, second, third in the expression “first ⁇ , second ⁇ , third ⁇ ” is merely a convenient number used for explaining the element. That is, unless otherwise specified, the expression “A includes the third ⁇ ” includes a case where A does not include the other first ⁇ and second ⁇ of the third ⁇ .
  • member ⁇ above member ⁇ and “member ⁇ below member ⁇ ” include not only when member ⁇ and member ⁇ are in contact, but also between member ⁇ and member ⁇ . It may include the case where other members are interposed in the.
  • a transmissive liquid crystal display device is disclosed as an example of the display device.
  • each embodiment does not preclude the application of the individual technical ideas disclosed in each embodiment to other types of display devices.
  • a reflective liquid crystal display device or the like is assumed.
  • FIG. 1 is a schematic plan view of a liquid crystal display device 1 (hereinafter referred to as a display device 1) in the first embodiment.
  • the display device 1 includes a display panel 2, a flexible circuit board 3, a controller 4, and a backlight BL.
  • a first direction X, a second direction Y, and a third direction Z are defined as illustrated. These directions X, Y, and Z are orthogonal to each other, but may intersect at an angle other than vertical.
  • the display panel 2 includes a first substrate SUB1, a second substrate SUB2, and a liquid crystal layer LC sealed between the substrates SUB1 and SUB2.
  • the first substrate SUB1 is an array substrate
  • the second substrate SUB2 is a counter substrate.
  • the second substrate SUB2 has a first end E1, a second end E2, a third end E3, and a fourth end E4.
  • the ends E1 and E2 are parallel to the second direction Y, for example.
  • the end portions E3 and E4 are parallel to the first direction X, for example.
  • the end portions E1 to E3 are aligned with the end portion of the first substrate SUB1.
  • the first substrate SUB1 has a terminal area TA exposed from the second substrate SUB2 in the vicinity of the fourth end E4.
  • a terminal T is disposed in the terminal area TA, and the flexible circuit board 3 is connected to the terminal T.
  • the backlight BL faces the first substrate SUB1, and emits light necessary for display toward the display panel 2.
  • the controller 4 controls the display panel 2 and the backlight BL.
  • the controller 4 is mounted on the flexible circuit board 3 as illustrated, but may be mounted on the terminal area TA.
  • the display panel 2 has a display area DA for displaying an image and a peripheral area PA surrounding the display area DA.
  • the terminal area TA is included in the peripheral area PA.
  • the portions along the end portions E1 to E3 of the peripheral area PA have a width Wpa.
  • the width Wpa is, for example, 700 ⁇ m or less, and preferably 500 ⁇ m or less.
  • the display panel 2 further includes a seal material SE for bonding the first substrate SUB1 and the second substrate SUB2.
  • the sealing material SE is annularly arranged along the end portions E1 to E4 in the peripheral area PA.
  • the sealing material SE is composed of a corner C1 composed of ends E1 and E3, a corner C2 composed of ends E2 and E3, a corner C3 composed of ends E2 and E4, and ends E1 and E4.
  • the corner C4 is bent and the other part is linear.
  • the shape of the sealing material SE is not limited to this example.
  • FIG. 2 is a diagram showing a configuration of the display panel 2 related to image display.
  • the display panel 2 includes a plurality of scanning signal lines G, a plurality of video signal lines S, scanning drivers GDR1 and GDR2, and a video driver VDR.
  • the plurality of scanning signal lines G extend in the first direction X and are arranged in the second direction Y in the display area DA.
  • the plurality of video signal lines S extend in the second direction Y and are arranged in the first direction X in the display area DA.
  • the scanning drivers GDR1 and GDR2 supply a scanning signal to each scanning signal line G.
  • the video driver VDR supplies a video signal to each video signal line S.
  • the drivers GDR1, GDR2, and VDR are controlled by the controller 4.
  • a sub-pixel SP is formed in an area defined by two adjacent scanning signal lines G and two adjacent video signal lines S.
  • the red subpixel SPR, the green subpixel SPG, and the blue subpixel SPB constitute a pixel PX that is the minimum unit for color display.
  • the pixel PX may include a subpixel SP of another color such as white.
  • the sub-pixel SP includes a switching element SW and a pixel electrode PE.
  • the switching element SW is connected to the scanning signal line G, the video signal line S, and the pixel electrode PE.
  • the pixel electrode PE is opposed to the common electrode CE extending over the plurality of subpixels SP. An image is displayed by an electric field formed between the pixel electrode PE and the common electrode CE acting on the liquid crystal layer LC.
  • FIG. 3 is a schematic cross-sectional view of the display panel 2.
  • the first substrate SUB1 includes a first base material 10, insulating layers 11 to 14, a first alignment film 15, a video signal line S, a pixel electrode PE, a common electrode CE, and a metal wiring ML. Yes.
  • the first substrate SUB1 also includes a scanning signal line G and a switching element SW.
  • the insulating layer 11 covers the upper surface of the first base material 10.
  • the video signal line S is formed on the insulating layer 11.
  • the insulating layer 12 covers the video signal line S and the insulating layer 11.
  • the metal wiring ML is formed on the insulating layer 12.
  • the insulating layer 13 covers the metal wiring ML and the insulating layer 12.
  • the common electrode CE is formed on the insulating layer 13.
  • the insulating layer 14 covers the common electrode CE.
  • the pixel electrode PE is formed on the insulating layer 14.
  • the first alignment film 15 covers the pixel electrode PE and the insulating layer 14.
  • the insulating layers 11 and 14 are inorganic insulating layers formed of, for example, an inorganic material.
  • the insulating layers 12 and 13 are organic insulating layers formed of an organic material.
  • the insulating layer 12 is thicker than the other insulating layers, and flattens the unevenness caused by the switching element SW or the like.
  • the metal wiring ML is opposed to the video signal line S and extends in the second direction Y along the video signal line S in plan view.
  • the metal wiring ML is electrically connected to the common electrode CE through a contact hole provided in the insulating layer 13 at a position different from the cross section of FIG.
  • the metal wiring ML is connected to the common electrode CE, whereby the resistance value of the common electrode CE is lowered. Further, when the common electrode CE divided into a plurality of blocks in the display area DA is used as an electrode of the touch sensor, the metal wiring ML connects the common electrode CE to the controller of the touch sensor.
  • the second substrate SUB2 includes a second base material 20, a light shielding layer 21, a color filter layer 22, an overcoat layer 23, and a second alignment film 24.
  • the light shielding layer 21 is formed on the lower surface of the second base material 20.
  • the light shielding layer 21 faces the scanning signal line G, the video signal line S, and the metal wiring ML.
  • the color filter layer 22 covers the light shielding layer 21 and the lower surface of the second substrate 20.
  • the overcoat layer 23 covers the color filter layer 22.
  • the second alignment film 24 covers the overcoat layer 23.
  • the color filter layer 22 includes a red color filter 22R, a green color filter 22G, and a blue color filter 22B. These color filters 22R, 22G, and 22B are opposed to the sub-pixels SPR, SPG, and SPB described above.
  • the liquid crystal layer LC described above is formed between the first alignment film 15 and the second alignment film 24.
  • a first polarizing plate PL1 is disposed on the lower surface of the first substrate SUB1, and a second polarizing plate PL2 is disposed on the upper surface of the second substrate SUB2.
  • a cover member CM is attached to the upper surface of the second polarizing plate PL2 via an adhesive layer AD.
  • the cover member CM is made of, for example, glass or transparent resin.
  • the display panel 2 includes a plurality of second protrusions 30 protruding from the second substrate SUB2 toward the first substrate SUB1 in the display area DA.
  • the second protrusion 30 is a spacer that maintains a cell gap between the first substrate SUB1 and the second substrate SUB2.
  • tip part (lower edge part in a figure) is contacting 1st board
  • the bottom portion (upper end portion in the drawing) of the second protrusion 30 is in contact with the overcoat layer 23.
  • the second protrusions 30 are arranged in the display area DA with a predetermined density.
  • the second protrusion 30 is arranged at a position where the scanning signal line G and the video signal line S intersect.
  • the light shielding layer 21 faces the second protrusion 30.
  • the structure of the display panel 2 is not limited to that shown in FIG.
  • the metal wiring ML may be in direct contact with the common electrode CE without using the insulating layer 13.
  • the common electrode CE may be provided on the second substrate SUB2.
  • FIG. 4 is a cross-sectional view schematically showing the structure of the display device 1 in the vicinity of the first end E1.
  • a similar structure can be applied to the vicinity of the other ends E2 to E4.
  • the cover member CM and the adhesive layer AD protrude from the first end E1.
  • the distance from the end of the cover member CM to the end of the adhesive layer AD is D1.
  • the distance from the end of the adhesive layer AD to the first end E1 is D2.
  • the distance D1 + D2 is preferably 0.7 mm or less, and more preferably 0.5 mm or less from the viewpoint of narrowing the frame.
  • the distance D1 is 0.1 to 0.2 mm, and the distance D2 is 0.1 mm or less.
  • FIG. 5 is a cross-sectional view showing the structure of the display panel 2 in the vicinity of the first end E1 in more detail. A similar structure can be applied to the vicinity of the other ends E2 to E4. In FIG. 5, elements between the insulating layer 12 and the light shielding layer 21 are shown, and other elements are omitted.
  • the light shielding layer 21 is formed as a whole. That is, the sealing material SE faces the light shielding layer 21.
  • the left end of the sealing material SE in the drawing is aligned with the first end E1 in the third direction Z.
  • a groove GR is formed in the insulating layers 12 and 13.
  • the sealing material SE fills the inside of the groove GR.
  • a conductive layer 16 is formed on the insulating layer 13 on the display area DA side (right side in the figure) from the groove GR.
  • the conductive layer 16 can be formed by the same process using the same material as the pixel electrode PE, for example.
  • the first alignment film 15 covers the conductive layer 16. In the region between the groove GR and the first end E1, the first alignment film 15 covers the insulating layer 13.
  • the color filter 22B is arranged at a position facing the seal material SE.
  • the two color filters 22 ⁇ / b> B are arranged with a gap therebetween, which causes unevenness on the lower surface of the overcoat layer 23.
  • the second alignment film 24 covers the overcoat layer 23.
  • the path from the outside to the liquid crystal layer LC becomes long at the boundary between the substrates SUB1, SUB2 and the sealing material SE. This makes it difficult for moisture to enter the liquid crystal layer LC from the outside. In addition, the adhesion area of the sealing material SE increases, and the substrates SUB1 and SUB2 are difficult to peel off.
  • the display panel 2 includes protrusions 31, 32, 33, and 34 that protrude from the second substrate SUB2 toward the first substrate SUB1 and a plurality of first protrusions 35 in the peripheral area PA.
  • the protrusions 31 to 34 are annular wall portions surrounding the display area DA.
  • the first protrusion 35 has a columnar shape, for example.
  • the protrusions 30 to 34 can be formed of an organic material, for example.
  • the protrusion 33 is an example of a sixth protrusion. The protrusion 33 overlaps with the sealing material SE in plan view.
  • the protrusions 31 and 32 are located between the seal material SE and the display area DA.
  • the protrusions 33 and 35 are located in the seal material SE.
  • the protrusion 34 (fifth protrusion) has the left side surface in the drawing aligned with the first end E1 in the third direction Z, and the other part is covered with the sealing material SE.
  • the protrusions 31 to 35 are separated from the first substrate SUB1 at the front end (lower end in the figure).
  • the bottom portions (upper end portions in the figure) of the protrusions 31 to 35 are in contact with the overcoat layer 23.
  • the tip portions of the protrusions 31 to 35 are hardly or not covered with the second alignment film 24.
  • the display panel 2 further includes a plurality of third protrusions 36 protruding from the first substrate SUB1 toward the second substrate SUB2. These third protrusions 36 are located in the sealing material SE. That is, these third protrusions 36 overlap with the sealing material SE in plan view.
  • the tip of the third protrusion 36 (the upper end in the figure) is separated from the second substrate SUB2.
  • the bottom portion (lower end portion in the drawing) of the third protrusion 36 is in contact with the insulating layer 13 or the conductive layer 16.
  • the side part and the tip part of the third protrusion 36 are not covered with the first alignment film 15.
  • FIG. 6 is a cross-sectional view showing specific shapes of the second protrusion 30 shown in FIG. 3 and the first protrusion 35 shown in FIG.
  • the protrusions 30 and 35 actually have a smooth shape as illustrated.
  • the height of the second protrusion 30 in the third direction Z is H1a.
  • the height of the first protrusion 35 in the third direction Z is H1b smaller than H1a (H1b ⁇ H1a).
  • the width of the bottom 30b of the second protrusion 30 is W1a
  • the width of the tip 30t of the second protrusion 30 is W2a smaller than W1a (W2a ⁇ W1a).
  • the tip portion 30t corresponds to, for example, a portion of the second protrusion 30 that is 95% or more of the height H1a.
  • the width of the bottom 35b of the first protrusion 35 is W1b, and the width of the tip 35t of the first protrusion 35 is W2b smaller than W1b (W2b ⁇ W1b).
  • the tip 35t corresponds to a portion of the first protrusion 35 that is 95% or more of the height H1b.
  • Width W1b is smaller than width W1a (W1b ⁇ W1a). Further, the width W2b is smaller than the width W2a (W2b ⁇ W2a). As an example, the width W2b is less than 10 ⁇ m, preferably less than 8 ⁇ m, and more preferably less than 6 ⁇ m. Further, the width W2b is 2 ⁇ m or more smaller than the width W2a. By reducing the width W2b in this way, more first protrusions 35 can be arranged in the seal material SE.
  • the second alignment film 24 When forming the second alignment film 24 on the first protrusions 30 and 35 having a small width, the alignment film material before curing on the first protrusions 35 and the side faces flows down. Therefore, the tip 35t and the side surface in the vicinity thereof are not covered with the second alignment film 24. That is, the first protrusion 35 is a narrow protrusion, and the second alignment film 24 does not cover the surface of the first protrusion 35. Therefore, by forming many first protrusions 35, the adhesive strength between the sealing material SE and the first substrate SUB1 can be greatly improved.
  • the protrusions 31 to 34, 36 have the same cross-sectional shape as the second protrusion 30 and the first protrusion 35 shown in FIG.
  • the height and width of the third protrusion 36 are the same as, for example, the first protrusion 35.
  • the height of the protrusion 34 in the third direction Z is H3.
  • the height H3 is larger than the height H1b (H3> H1b).
  • the thickness of the second alignment film 24 in the display area DA is T1a
  • the thickness of the first alignment film 15 in the display area DA is T1b. is there.
  • the thickness of the second alignment film 24 between the adjacent first protrusions 35 is T2a
  • the thickness of the first alignment film 15 between the adjacent third protrusions 36 is T2b. .
  • the alignment film material flows down from the first protrusion 35 and the second protrusion 30 when the second alignment film 24 is formed.
  • T2a is larger than T1a (T2a> T1a).
  • T2b is larger than T1b (T2b> T1b).
  • FIG. 7 is a graph in which the amount of plastic deformation is measured for columnar protrusions having the same shape as the protrusions 30, 35, and 36.
  • the vertical axis represents the total deformation amount [ ⁇ m] when the protrusion is deformed by applying an external force.
  • the horizontal axis represents the amount of plastic deformation [ ⁇ m] after the external force is applied. The measurement was performed on five samples having a tip width of 8 ⁇ m, 6 ⁇ m, 5 ⁇ m, 4 ⁇ m, and 3 ⁇ m.
  • the curve in the figure is an approximate curve related to the plot of measurement results for each sample. From the comparison of these approximate curves, it can be seen that the amount of plastic deformation is smaller in the sample having a wider tip.
  • the approximate curves of 8 ⁇ m, 6 ⁇ m and 5 ⁇ m have no significant difference in the amount of plastic deformation.
  • the 4 ⁇ m and 3 ⁇ m approximate curves have a significantly increased plastic deformation amount relative to the total deformation amount compared to the 5 ⁇ m approximate curve.
  • the width W2a of the second protrusion 30 is preferably 8 ⁇ m or more and more preferably 10 ⁇ m or more because sufficient strength as a spacer is required.
  • the width W2b is preferably less than 8 ⁇ m and may be 6 ⁇ m or less. More preferably, it is more preferably 5 ⁇ m or less.
  • the first protrusion 35 and the third protrusion 36 whose tip portions and the vicinity thereof are not covered with the alignment films 15 and 24 are arranged in the sealing material SE.
  • the adhesiveness between the first protrusion 35 and the third protrusion 36 formed of an organic material and the sealing material SE is higher than the adhesiveness between the alignment films 15 and 24 and the sealing material SE, and thus the sealing material SE is difficult to peel off. .
  • FIG. 8 is a schematic plan view showing the protrusions 31 to 36 in the vicinity of the first end E1. A similar structure can be applied to the vicinity of the other ends E2 to E4.
  • the protrusions 31 to 34 all extend parallel to the second direction Y.
  • the plurality of first protrusions 35 are spaced apart from each other and arranged in the form of dots in a region overlapping with the sealing material SE. That is, the plurality of first protrusions 35 are distributed at intervals without the bottom portions 35b being connected to each other.
  • the plurality of third protrusions 36 are also arranged in a dot shape.
  • the first protrusion 35 and the third protrusion 36 are circular, but may have other planar shapes such as an ellipse, a square, or a rectangle.
  • the width of the third protrusion 36 preferably satisfies the same conditions as the widths W1b and W2b of the first protrusion 35 described above.
  • the width in the width direction (first direction X in the illustrated example) of the sealing material SE is Ws.
  • the width Ws is 500 ⁇ m or less, preferably 350 ⁇ m or less.
  • N is defined as the number of first protrusions 35 arranged in the width direction of the sealing material SE.
  • the number N may be an average value of the first protrusions 35 arranged in the width direction at each position of the sealing material SE along the first end E1.
  • the number N is small, the effect of preventing the seal material SE from peeling off cannot be obtained sufficiently. Therefore, it is preferable to determine the number N so that the distance D in plan view between the centers of the adjacent first protrusions 35 is not more than three times the width W1b (D ⁇ 3 ⁇ W1b).
  • the width Ws of the sealing material SE increases by the volume of such a large number of first protrusions 35. Considering these, it is preferable that the width Ws, the number N, and the width W1b of the bottom portion 35b of the first protrusion 35 described above satisfy the following expression (1). 0.3 ⁇ Ws / (N ⁇ W1b) ⁇ 1 (1)
  • the third protrusion 36 is also preferably arranged so as to satisfy the same condition as that described for the first protrusion 35.
  • the protrusion 34 is arranged along a cut line for cutting out the first substrate SUB1 and the second substrate SUB2 from the mother glass.
  • the protrusion 34 also plays a role of suppressing the spread of the seal material SE before curing in the manufacturing process.
  • the width W3 of the protrusion 34 is larger than the width W1b.
  • the width Ws of the sealing material SE increases by the volume of the first protrusion 35. Therefore, the width W3 is preferably 30 ⁇ m or less, and more preferably 10 ⁇ m or more.
  • the density of the first protrusions 35 is constant throughout the seal material SE, for example. However, the density of the sealing material SE may be partially changed. For example, the sealing material SE is bent at the corners C1 to C4 shown in FIG. Since the sealing material SE is easily peeled off at such a bent portion, the density of the first protrusions 35 may be higher than other portions (for example, straight portions) of the sealing material SE. The same applies to the density of the third protrusions 36.
  • FIG. 9 is a plan view of a display panel 2 according to a modification of the present embodiment.
  • the display panel 2 has a notch NC that is recessed in the second direction Y at the third end E3.
  • a smartphone or a tablet camera is arranged in the notch NC.
  • the seal material SE is bent along the shape of the notch NC. In such a bent portion, it is preferable that the density of the first protrusions 35 and the third protrusions 36 is higher than other portions (for example, locations corresponding to the first end E1 and the second end E2).
  • the first protrusion 35 and the third protrusion 36 are provided in the seal material SE, so that peeling of the seal material SE can be suppressed.
  • the sealing material SE is peeled off when the width Wpa of the peripheral area PA is as small as 700 ⁇ m or less, further 500 ⁇ m or less, or when the distance D1 + D2 from the end of the cover member CM to the end of the display panel 2 is 0 as described above. It is likely to occur when it is as small as 0.7 mm or less, or 0.5 mm or less.
  • the peeling of the sealing material SE can be suitably suppressed even under such conditions.
  • one of the first protrusion 35 and the third protrusion 36 may be omitted. Even in this case, the effect of suppressing the peeling of the sealing material SE can be obtained.
  • FIG. 10 is a schematic cross-sectional view of the display panel 2 according to the second embodiment. Although the vicinity of the first end E1 is shown here as in FIG. 5, the same structure can be applied to the vicinity of the other ends E2 to E4.
  • the third protrusion 36 is not provided on the first substrate SUB1.
  • the insulating layer 13 formed of an organic material has a plurality of fourth protrusions 37. These fourth protrusions 37 are arranged between the end of the first substrate SUB1 and the groove GR. That is, these fourth protrusions 37 overlap with the sealing material SE in plan view.
  • the fourth protrusion 37 is not provided between the groove GR and the display area DA (right side in the figure). However, the fourth protrusion 37 or the third protrusion 36 of the first embodiment may be provided between the groove GR and the display area DA.
  • the fourth protrusion 37 can be formed together with the groove GR by patterning the insulating layers 12 and 13 which are organic materials using a multitone mask at the time of exposure, for example.
  • the fourth protrusion 37 is formed only by the insulating layer 13, but the insulating layer 12 may be included in a part of the fourth protrusion 37.
  • the lower portions of the plurality of fourth protrusions 37 may be connected by the thin insulating layer 13.
  • the fourth protrusions 37 can be arranged in a dot shape like the third protrusions 36 shown in FIG. 8, for example.
  • the specific shape of the fourth protrusion 37 is the same as that of the first protrusion 35 shown in FIG. 6, for example.
  • the width of the tip of the fourth protrusion 37 in the width direction of the seal material SE (the first direction X in the illustrated example) is W4.
  • the width W4 is less than 10 ⁇ m, preferably less than 8 ⁇ m, and more preferably less than 6 ⁇ m.
  • the width W4 is 2 ⁇ m or more smaller than the width W2a of the distal end portion of the second protrusion 30 disposed in the display area DA.
  • the width of the bottom portion of the fourth protrusion 37 in the width direction of the sealing material SE is W4b
  • the following expression (2) is satisfied, like the first protrusion 35 and the third protrusion 36.
  • the width of the sealing material SE is Ws
  • the number of the fourth protrusions 37 in the width direction of the sealing material SE is N.
  • the height of the fourth protrusion 37 is H4.
  • the height H4 is, for example, not more than the thickness of the insulating layer 13 in the display area DA, and further not more than the height of each of the protrusions 30 to 35.
  • the alignment film material flows down from the fourth protrusions 37 and collects around the fourth protrusions 37. Therefore, the thickness T2b of the first alignment film 15 between the adjacent fourth protrusions 37 is larger than the thickness T1b of the first alignment film 15 in the display area DA (T2b> T1b).
  • the tip of the fourth protrusion 37 and the vicinity thereof are not covered with the first alignment film 15. Therefore, the 4th protrusion 37 suppresses peeling of the sealing material SE similarly to the 3rd protrusion 36 of 1st Embodiment.
  • the third protrusion 36 is provided as in the first embodiment, a process of forming an organic material layer as a base and patterning process is necessary.
  • the 4th protrusion 37 can be formed by patterning the insulating layer 13 with the groove
  • the same effects as those of the first embodiment can be obtained from this embodiment.
  • SYMBOLS 1 ... Display apparatus, 2 ... Display panel, 3 ... Flexible circuit board, 4 ... Controller, SUB1 ... 1st board

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  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
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  • Liquid Crystal (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un dispositif d'affichage à cristaux liquides comprenant : un premier substrat et un deuxième substrat, ayant chacun une région d'affichage et une région périphérique autour de la région d'affichage ; un matériau d'étanchéité qui fait adhérer le premier substrat et le deuxième substrat dans les régions périphériques de ceux-ci ; un premier film d'alignement disposé sur le premier substrat ; un deuxième film d'alignement disposé sur le deuxième substrat ; une couche de cristaux liquides entre le premier film d'alignement et le deuxième film d'alignement ; et une pluralité de parties saillantes qui font saillie depuis le deuxième substrat vers le premier substrat. La pluralité de parties saillantes comprend des premières parties saillantes qui se chevauchent avec le matériau d'étanchéité dans une vue en plan, et des deuxièmes parties saillantes positionnées dans la région d'affichage. La largeur au niveau de la pointe des premières parties saillantes est inférieure à la largeur au niveau de la pointe des deuxième parties saillantes, et elle est inférieure à 10 µm.
PCT/JP2019/007949 2018-04-13 2019-02-28 Dispositif d'affichage à cristaux liquides WO2019198376A1 (fr)

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EP3812832A1 (fr) * 2019-10-23 2021-04-28 InnoLux Corporation Dispositif électronique
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