WO2022004799A1 - 液晶表示装置 - Google Patents

液晶表示装置 Download PDF

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Publication number
WO2022004799A1
WO2022004799A1 PCT/JP2021/024792 JP2021024792W WO2022004799A1 WO 2022004799 A1 WO2022004799 A1 WO 2022004799A1 JP 2021024792 W JP2021024792 W JP 2021024792W WO 2022004799 A1 WO2022004799 A1 WO 2022004799A1
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WO
WIPO (PCT)
Prior art keywords
region
liquid crystal
substrate
spacer
seal
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/JP2021/024792
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English (en)
French (fr)
Japanese (ja)
Inventor
博嗣 梅田
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to US18/003,826 priority Critical patent/US12072585B2/en
Priority to KR1020227045051A priority patent/KR102879805B1/ko
Priority to CN202180044346.XA priority patent/CN115956219B/zh
Priority to JP2022534086A priority patent/JP7712930B2/ja
Priority to EP21834192.3A priority patent/EP4174562A4/en
Publication of WO2022004799A1 publication Critical patent/WO2022004799A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02F1/13396—Spacers having different sizes
    • 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
    • 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
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • 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
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/56—Substrates having a particular shape, e.g. non-rectangular
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/60—Temperature independent

Definitions

  • the present disclosure relates to an atypical liquid crystal display device having a notch in the outer peripheral shape.
  • the present disclosure also relates to a non-rectangular liquid crystal display device having a notch in the outer peripheral shape.
  • the liquid crystal display device is composed of an array substrate having a TFT (Thin Film Transistor) and an electrode, a liquid crystal panel in which a color filter substrate having a color material and a black matrix is bonded with a liquid crystal layer sandwiched between them, and a backlight as a light source.
  • the distance between the array substrate and the color filter substrate is called a cell gap, and since the cell gap corresponds to the thickness of the liquid crystal layer, the fluctuation greatly affects the transmittance of the liquid crystal layer. Therefore, unevenness of the cell gap (hereinafter referred to as gap unevenness) in the display area where the image is displayed becomes a cause of the defect of the display unevenness.
  • a spacer that is sandwiched between the two substrates and maintains the cell gap within a certain range is arranged in the liquid crystal layer.
  • the seal formed so as to surround the liquid crystal layer between the two substrates also plays a role of maintaining the cell gap.
  • a columnar spacer formed by pattern exposure on the surface of the color filter substrate in contact with the liquid crystal display may be used.
  • the columnar spacer In normal times when there are no external factors such as external force or temperature change, the columnar spacer is sandwiched between the array substrate and the color filter substrate and is deformed to be slightly crushed, and the elastic force maintains the cell gap within a certain range. do.
  • the elastic force of the columnar spacer is too strong, the columnar spacer cannot follow when the liquid crystal shrinks in a low temperature environment, so that a problem of low temperature foaming in which bubbles are generated in the liquid crystal is likely to occur.
  • the cell gap becomes larger than the height of the columnar spacer when the liquid crystal expands in a high temperature environment, and when the liquid crystal panel is installed so as to stand upright, the liquid crystal is displayed at the bottom of the panel.
  • the problem of swelling under high temperature that accumulates is likely to occur.
  • a dual spacer structure in which two types of columnar spacers with different heights are formed may be used.
  • the high main spacer functions to maintain the cell gap by contacting the array substrate and the color filter substrate, and the height is increased.
  • the lower subspacers do not contact the array substrate and do not function as spacers.
  • the sub spacer also comes into contact with the array substrate and functions as a spacer, suppressing the cell gap from becoming smaller than that. Furthermore, by using the sub spacer together, there is an advantage that it becomes easier to set the elastic force of the main spacer more appropriately.
  • liquid crystal displays having a non-rectangular shape have become widespread.
  • Atypical displays have various uses such as automobile instrument panels and mobile phones, and are attracting attention from the viewpoint of function and design.
  • the internal stress of a member such as a glass substrate or a polarizing plate tends to concentrate there, and as a result, a cell gap is formed around the notch.
  • a problem that it fluctuates locally and becomes gap unevenness, resulting in display unevenness.
  • non-rectangular displays in which the outer shape of the display device is not rectangular have become widespread.
  • Non-rectangular displays have various uses such as automobile instrument panels and mobile phones, and are attracting attention from the viewpoint of function and design.
  • the internal stress of a member such as a glass substrate or a polarizing plate tends to concentrate near the corner of the notch, and as a result, the cell gap is localized around the notch. There is a problem that it fluctuates and becomes gap unevenness, and display unevenness occurs.
  • Patent Document 1 in a liquid crystal panel of a curved irregular display having a non-rectangular planar shape including a notch, the liquid crystal panel has a concentric shape centered on a change point of the outer peripheral shape of the display area.
  • a form in which the spacer arrangement density increases per unit area toward the outside is shown.
  • the spacer placement density indicates the sum of the areas of the columnar spacers placed per unit area of the substrate surface in a plan view, that is, the area density.
  • Patent Document 2 in a rectangular liquid crystal panel having a liquid crystal injection step, the elastic force of the spacer is increased by increasing the columnar spacer placement density at the corner corners on the opposite side of the injection port or by using a bank-shaped spacer. The form that enhances is shown.
  • Patent Document 3 discloses a rectangular liquid crystal panel in which a dummy seal having only a spacer function and not having a function of sealing the liquid crystal is formed only at a position close to a corner corner portion.
  • Patent Document 1 in the liquid crystal panel of a curved non-rectangular display having a non-rectangular planar shape including a notch, the change point of the outer peripheral shape of the display area is set.
  • a form is shown in which the spacer arrangement density increases per unit area toward the outside in a concentric circle with the center.
  • the spacer placement density indicates the sum of the areas of the columnar spacers placed per unit area of the substrate surface in a plan view, that is, the area density.
  • Patent Document 2 in a rectangular liquid crystal panel having a liquid crystal injection step, the elastic force of the spacer is increased by increasing the columnar spacer placement density at the corner corners on the opposite side of the injection port or by using a bank-shaped spacer. The form that enhances is shown.
  • Patent Document 3 discloses a rectangular liquid crystal panel in which a dummy seal having only a spacer function and not having a function of sealing the liquid crystal is formed only at a position close to a corner.
  • Patent No. 6625310 Japanese Unexamined Patent Publication No. 2014-35428 Japanese Patent Application Laid-Open No. 2002-328382
  • Patent Document 1 is premised on a curved atypical display and lowers the spacer arrangement density of the notch, so that uneven display of the notch cannot be suppressed. Further, since the sub-spacer arrangement density is low, the strength due to the external pressure is weakened and unevenness occurs. Further, the technique described in Patent Document 2 or Patent Document 3 does not relate to an atypical display, and there is no description regarding correspondence to a notch.
  • Patent Document 1 is premised on a curved non-rectangular display and lowers the spacer arrangement density of the notch portion, so that display unevenness of the notch portion is suppressed. Can not do it. Further, since the sub-spacer arrangement density is low, the strength due to the external pressure is weakened and unevenness occurs. Further, the technique described in Patent Document 2 or Patent Document 3 does not relate to a non-rectangular display, and there is no description regarding correspondence to a notch portion.
  • the liquid crystal display device of the present disclosure includes a first substrate, a second substrate arranged to face the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate.
  • the first substrate is arranged between the first substrate and the second substrate so as to surround the liquid crystal layer, and is provided on a seal having a curved recess in the outer peripheral shape and a surface facing the liquid crystal layer of the first substrate.
  • the area corresponding to the liquid crystal layer and displaying an image is set as the first area, and the area corresponding to the liquid crystal layer corresponds to the curve of the seal.
  • the region corresponding to the liquid crystal layer is defined, and the region other than the first region and the region other than the second region is defined as the third region
  • the second region is viewed in plan view.
  • the area occupied by the first spacer per unit area is larger than the area occupied by the first spacer per unit area of the third region.
  • the liquid crystal display device of the present disclosure includes a first substrate, a second substrate arranged to face the first substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a first substrate.
  • a seal arranged so as to surround the liquid crystal layer between the second substrate and a spacer provided between the first substrate and the second substrate to maintain the distance between the first substrate and the second substrate.
  • the seal smoothly connects the first seal portion extending in the first direction, the second seal portion extending in the second direction different from the first direction, and the first seal portion and the second seal portion.
  • the first seal portion and the second seal portion have a linear shape
  • the third seal portion has a curved shape such as an arc shape.
  • the area for displaying an image is defined as the first area (display area), and the boundary point between the third seal portion, the outer circumference of the first region, and the first seal portion and the third seal portion.
  • the area surrounded by the first normal line drawn from the outer circumference of the first region and the second normal line drawn from the boundary point between the second seal portion and the third seal portion to the outer circumference of the first region is the first.
  • Two regions are defined, and regions other than the first region and other than the second region are defined as the third region.
  • the spacer arrangement density is defined as the ratio of the area occupied by the spacer per unit area in a plan view
  • the spacer arrangement density is larger in the second region than in the third region.
  • the internal angle formed by the first direction and the second direction exceeds 180 °, the effect is particularly large.
  • the internal angle is the inner angle formed by the two straight lines, that is, the angle on the center side of the display area.
  • the substrate on which the spacer is arranged at the time of manufacturing is referred to as the first substrate, and the other substrate is referred to as the second substrate.
  • a seal arranged so as to surround the liquid crystal layer and having a curved recess in the outer peripheral shape, and a spacer provided on the surface of the first substrate facing the liquid crystal layer to maintain the distance between the first substrate and the second substrate.
  • the area corresponding to the liquid crystal layer and displaying an image is set as the first area, and the concave portion of the curve of the seal, the outer periphery of the first region, and the starting point of the concave portion of the curved line of the seal correspond to the liquid crystal layer.
  • the area surrounded by the first normal line drawn from the outer periphery of the first region and the second normal line drawn from the end point of the concave portion of the curve of the seal to the outer periphery of the first region is defined as the second region, and the liquid crystal layer.
  • the area occupied by the spacer per unit area of the second region in the plan view is the unit area of the third region. It is characterized by being larger than the area occupied by the spacer. (Application example 2)
  • the spacer arrangement density in the second region may or may not be uniform.
  • the liquid crystal display device according to Application Example 1 is characterized in that the spacer arrangement density in the second region becomes smaller as it approaches the first normal or the second normal.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to Application Example 1 or Application Example 2, and the spacer placement density in the third region is equal to or less than the minimum value of the spacer placement density in the second region. Characterized by a certain thing. That is, the spacer placement density in the third region is the same as or smaller than the minimum value of the spacer placement density in the second region.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to any one of Application Examples 1 to 3, and the spacer placement density in the third region is equal to or higher than the spacer placement density in the first region. It is characterized by being. That is, the spacer placement density in the third region is the same as or higher than the spacer placement density in the first region.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to any one of Application Examples 1 to 4, wherein the spacers include a first spacer and a second spacer having a height lower than that of the first spacer.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to any one of Application Examples 1 to 3, and the spacer in the second region is a dummy seal made of the same material as the seal. It is characterized by.
  • the liquid crystal display device of the present disclosure includes a first substrate, a second substrate arranged to face the first substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a first substrate. It has a seal arranged so as to surround the liquid crystal layer between the second substrate and a spacer provided on a surface of the first substrate facing the liquid crystal layer.
  • the seal smoothly includes a first seal portion extending in the first direction, a second seal portion extending in a second direction different from the first direction, and a first seal portion and a second seal portion.
  • the first seal portion and the second seal portion have a linear shape
  • the third seal portion has a curved shape such as an arc shape.
  • the area where the image is displayed in a plan view on the liquid crystal display device is defined as the first area (display area), and the boundary point between the third seal portion, the outer circumference of the first region, and the first seal portion and the third seal portion.
  • the area surrounded by the first normal line drawn from the outer circumference of the first region and the second normal line drawn from the boundary point between the second seal portion and the third seal portion to the outer circumference of the first region is the first.
  • Two regions are defined, and regions other than the first region and other than the second region are defined as the third region.
  • the height of at least one spacer in the second region is the height of the spacer in the third region. It is higher than that.
  • the internal angle formed by the first direction and the second direction exceeds 180 °, the effect is particularly large.
  • the internal angle is the inner angle formed by the two straight lines, that is, the angle on the center side of the display area.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to the application example 7, in which the height of the spacer in the second region is set before the second substrate is arranged so as to face the first substrate. It is characterized in that it becomes lower as it gets closer to the first normal or the second normal.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to Application Example 7 or Application Example 8, and is the most in the second region before the second substrate is arranged facing the first substrate.
  • the height of the low spacer is characterized by being greater than or equal to the height of the highest spacer in the third region.
  • the liquid crystal display device of the present disclosure is the liquid crystal display device according to any one of the application examples 7 to 9, and the third region is before the second substrate is arranged so as to face the first substrate.
  • the height of the spacer is the same as or higher than the height of the first spacer in the first region.
  • the liquid crystal display device of the present disclosure includes a first substrate, a second substrate arranged to face the first substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a first substrate. It has a seal arranged so as to surround the liquid crystal layer between the second substrate and a spacer provided on a surface of the first substrate facing the liquid crystal layer.
  • the seal smoothly includes a first seal portion extending in the first direction, a second seal portion extending in a second direction different from the first direction, and a first seal portion and a second seal portion.
  • the first seal portion and the second seal portion have a linear shape
  • the third seal portion has a curved shape such as an arc shape.
  • the region for displaying an image in a plan view on a liquid crystal display device is set as the first region, and the first region is from the boundary point between the third seal portion, the outer circumference of the first region, and the first seal portion and the third seal portion.
  • the area surrounded by the first normal line drawn on the outer circumference of the first area and the second normal line drawn on the outer periphery of the first area from the boundary point between the second seal portion and the third seal portion is defined as the second area.
  • a region other than the first region and other than the second region is defined as the third region.
  • the spacer in the second region is arranged so as to overlap with the convex pattern provided in the second region of the surface facing the liquid crystal layer of the first substrate.
  • the internal angle formed by the first direction and the second direction exceeds 180 °, the effect is particularly large.
  • the internal angle is the inner angle formed by the two straight lines, that is, the angle on the center side of the display area.
  • the liquid crystal display device of the present disclosure includes a first substrate, a second substrate arranged to face the first substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a first substrate. It has a seal arranged so as to surround the liquid crystal layer between the second substrate and a spacer provided on a surface of the first substrate facing the liquid crystal layer.
  • the seal smoothly includes a first seal portion extending in the first direction, a second seal portion extending in a second direction different from the first direction, and a first seal portion and a second seal portion.
  • the first seal portion and the second seal portion have a linear shape
  • the third seal portion has a curved shape such as an arc shape.
  • the region for displaying an image in a plan view on a liquid crystal display device is set as the first region, and the first region is from the boundary point between the third seal portion, the outer circumference of the first region, and the first seal portion and the third seal portion.
  • the area surrounded by the first normal line drawn on the outer circumference of the first area and the second normal line drawn on the outer periphery of the first area from the boundary point between the second seal portion and the third seal portion is defined as the second area.
  • a region other than the first region and other than the second region is referred to as a third region.
  • the spacer of the second region is arranged so as to face and overlap the convex pattern provided in the second region of the surface facing the liquid crystal layer of the second substrate.
  • the internal angle formed by the first direction and the second direction exceeds 180 °, the effect is particularly large.
  • the internal angle is the inner angle formed by the two straight lines, that is, the angle on the center side of the display area.
  • the elastic force of the spacer is strengthened due to gap unevenness. It is possible to suppress the occurrence of display unevenness.
  • the portion where the internal angle of the seal surrounding the liquid crystal layer is 180 ° or more (the portion where the cutout portion from the virtual rectangular display device is considered to exist) and the display area.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the second embodiment of the present invention.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the third embodiment of the present invention.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the fourth embodiment of the present invention. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the sixth embodiment of the present invention.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the seventh embodiment of the present invention.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the eighth embodiment of the present invention. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG. It is sectional drawing of the liquid crystal display device of FIG. It is a top view of the liquid crystal display device of Embodiment 5. It is sectional drawing of the liquid crystal display device of FIG. It is an enlarged plan view of a part of the liquid crystal display device of FIG. It is an enlarged plan view of a part of the liquid crystal display device of FIG.
  • FIG. 3 is an enlarged plan view of a part of the liquid crystal display device according to the sixth embodiment of the present invention.
  • FIG. 1 is a plan view of a liquid crystal panel 101 used in the atypical display according to the first embodiment of the present disclosure.
  • the seal 9 is arranged inside the outer periphery, and the liquid crystal layer 3 is formed inside the seal 9. Further, the liquid crystal layer 3 includes a display area 4 for displaying an image.
  • the liquid crystal panel 101 has an outer peripheral shape in which notches are formed in the upper right and upper left corners of the paper surface with respect to the rectangle, and the liquid crystal layer 3 and the display area 4 surrounded by the seal 9 also have notches. It has become.
  • the non-display area on the peripheral edge of the liquid crystal layer 3 surrounded by the sticker 9 and the display area 4 is defined as the frame area 5.
  • the outer peripheral shape of the corner portion of the notch of the liquid crystal panel 101 shown in the region X surrounded by the dotted line is an outer peripheral shape having an R shape at the corner. This is a shape that takes into consideration not only the design but also the suppression of the occurrence of polarizing plate cracks due to the stress concentration of the glass substrate and the polarizing plate constituting the liquid crystal panel 101 and the outer shape processability of the glass substrate. However, depending on the shape of the outer circumference, it may be a corner instead of an R shape.
  • the seal 9 also has an outer peripheral shape with R-shaped corners, but this is not only to correspond to the outer peripheral shape of the liquid crystal panel 101, but also to make the width and height of the seal 9 constant. This is also due to the fact that the R shape is easier to handle than the corners in forming the shape.
  • FIG. 2 is a cross-sectional view showing a cross section of YY in FIG. 1 of the liquid crystal panel 101.
  • the liquid crystal panel 101 has a structure in which an array substrate 1 and a color filter substrate 2 sandwich and bond a liquid crystal layer 3 made of a liquid crystal, and has an FFS (Flinge Field Withing) drive method.
  • FFS Field Withing
  • pixels are formed in a matrix by orthogonal scanning signal lines and display signal lines on the surface of the array substrate 1 facing the liquid crystal layer 3 corresponding to the display area 4 for displaying an image, and each pixel has a liquid crystal display.
  • a pixel electrode and a common electrode are formed via an insulating layer, and a TFT (Thin Film Transistor), which is a switching element that gives a potential to the pixel electrode, is provided.
  • a TFT Thin Film Transistor
  • a color material 6 having a color such as RGB corresponding to each pixel a black matrix 7 that shields wiring between pixels and a TFT region from light, and a color material 6
  • An overcoat film 8 is formed to protect the surface.
  • the black matrix 7 and the overcoat film 8 are further extended to the frame region 5 to shield the periphery of the display region 4 from light.
  • a polarizing plate is attached to the surface of the array substrate 1 and the color filter substrate 2 that does not face the liquid crystal layer 3, and the surface of the array substrate 1 and the color filter substrate 2 faces the liquid crystal layer 3. Is formed with an alignment film that orients the liquid crystal display.
  • the liquid crystal layer 3 is surrounded by a seal 9 and sealed between the array substrate 1 and the color filter substrate 2.
  • the distance between the array substrate 1 and the color filter substrate 2 is particularly referred to as a cell gap 10. Since the liquid crystal is sealed so as to fill the cell gap 10, the cell gap 10 is equal to the thickness of the liquid crystal layer 3.
  • An elastic member such as silicon rubber is used for the seal 9. Therefore, the seal 9 has a role of sealing the liquid crystal display and also a role of a spacer described below for maintaining the cell gap 10.
  • a columnar spacer 11 is formed on the surface of the color filter substrate 2 facing the liquid crystal layer 3.
  • the columnar spacer 11 is arranged so as to be sandwiched between the array substrate 1 and the color filter substrate 2, and functions as a support material for maintaining the cell gap 10 in a certain range. Since the columnar spacer 11 is made of, for example, a UV photosensitive resin and is formed by pattern exposure using a mask, it can be accurately arranged at a desired position. Since the liquid crystal does not exist in the portion where the columnar spacer 11 is located and the liquid crystal is not normally oriented in the region around the columnar spacer 11, it is not possible to control the transmission or shading of the light of the backlight in the vicinity of the columnar spacer 11. It becomes an area.
  • the columnar spacer 11 when the columnar spacer 11 is arranged in the display area 4, it is arranged so as to overlap the black matrix 7 in a plan view so as to be shielded from light so as not to affect the displayed image.
  • the columnar spacer 11 has a height larger than the assumed cell gap 10 before the array substrate 1 and the color filter substrate 2 are attached to each other, and the array substrate 1 and the color filter substrate 2 are attached to each other to form a predetermined cell.
  • the gap When the gap is 10, it is in a slightly crushed state.
  • the cell gap 10 becomes smaller due to an external force or a temperature change in the environment, it is suppressed to become smaller due to the repulsive force, and when the cell gap 10 becomes larger, the crushed portion by bonding is restored.
  • FIG. 3 is a plan view of the region X surrounded by the dotted line of the notch in FIG.
  • the liquid crystal panel 101 has an outer peripheral shape in which a notch is formed, and is inside the liquid crystal layer 3 surrounded by the seal 9 formed inside the outer periphery of the liquid crystal panel 101, and further inside the seal 9.
  • the display area 4 formed and displaying an image also has a shape having a notch.
  • the outer peripheral shape of the corner portion of the notch of the liquid crystal panel 101 is not a corner but an R shape from the viewpoint of crack prevention and workability as well as designability, and the seal 9 is also sealed at the time of forming the seal. It has an outer peripheral shape with an R shape instead of a corner so that the thickness and width can be easily controlled.
  • the outer peripheral shape of the display area 4 is also a shape in which the corners are R-shaped.
  • the frame area 5 is divided into the following areas when the columnar spacer 11 is arranged.
  • a seal 9a a straight portion formed vertically above the paper surface
  • a seal 9b a curved concave portion
  • a seal 9c a straight portion formed horizontally below the paper surface
  • the boundary point between the seal 9a and the seal 9b is defined as a point A
  • the boundary point between the seal 9b and the seal 9c is defined as a point B.
  • the intersections of the normal lines 15 and 16 of the seal 9b drawn from the points A and B to the outer peripheral line 4a of the display area 4 with the outer peripheral line 4a are defined as points C and D.
  • the frame area 5 surrounded by the line segment AB, the line segment BD, the line segment DC, and the line segment CA is particularly referred to as the frame area 5a.
  • an area other than the display area 4 and the frame area 5a, that is, the seal 9a or the seal 9c which is a straight portion of the seal and the frame area 5 sandwiched between the seal 9c and the display area 4 is particularly referred to as a frame area 5b.
  • FIG. 4 shows the arrangement of the columnar spacer 11 for each region described in FIG.
  • the columnar spacers 11a indicated by circles are arranged in the display area 4, the frame area 5a, and the frame area 5b at equal pitches so that the number of arrangements per area is equal, and are further indicated by double circles.
  • the columnar spacer 11b is arranged only in the frame area 5a.
  • the columnar spacer 11a and the columnar spacer 11b are displayed differently for convenience of explanation, but are columnar spacers 11 having the same cross-sectional area and height and having the same specifications. That is, in the form shown in FIG.
  • the columnar spacer 11 in which the columnar spacer 11a and the columnar spacer 11b are combined has the highest spacer placement density in the frame region 5a as compared with the display region 4 and the frame region 5b.
  • the spacer placement density indicates the sum of the areas of the columnar spacers 11 arranged per unit area of the substrate surface in a plan view, that is, the area density.
  • the form shown in FIG. 4 is an example of the present disclosure, and the spacer arrangement density and arrangement of the columnar spacer 11a and the columnar spacer 11b may be freely set.
  • the columnar spacer 11a is not provided and only the columnar spacer 11b is arranged at the same pitch as the columnar spacer 11a in the frame region 5b.
  • the spacer arrangement density of the columnar spacers 11 in the frame region 5a may be set to be higher than that in the frame region 5b by making the area larger than the area in a plan view per piece. That is, the spacer arrangement density of the columnar spacer 11 may be the frame region 5b ⁇ frame region 5a.
  • the spacer arrangement density of the columnar spacer 11 in each region may be changed corresponding to the region where the gap unevenness occurs.
  • the stress generated in the processing of the member and the panel manufacturing process remains inside the glass substrate and the polarizing plate, but when the outer peripheral shape has a notch, this stress concentrates toward the corner of the notch and the cell.
  • the gap 10 tends to be narrow.
  • gap unevenness which is a local variation of the cell gap 10
  • display unevenness having a brightness different from that of the surroundings may occur.
  • the columnar spacer 11 in the area of the display area 4, it is necessary to arrange the columnar spacer 11 so as to overlap the black matrix 7, so that the size of one columnar spacer 11 in a plan view is limited. Also, considering that the columnar spacer 11 affects the rubbing and there is a risk that a rubbing defect occurs around the columnar spacer 11, the columnar spacer 11 that is often originally arranged in the entire display area 4 Therefore, there is a large restriction on the arrangement in order to additionally arrange only the pixels around the corner of the notch. In the first embodiment, the spacer placement density of the columnar spacer 11 is increased in a part of the frame area 5 that does not affect the display without being restricted by the black matrix 7, and the degree of freedom of placement is high and large. There is a merit that the effect can be easily obtained.
  • Embodiment 2 In the first embodiment, regarding the spacer placement densities of the columnar spacers 11 of the display area 4, the frame area 5a, and the frame area 5b, the frame area 5a has the highest spacer placement density.
  • the arrangement of the columnar spacer 11 in the frame region 5a will be further described.
  • FIG. 5 is a plan view showing the arrangement of the columnar spacer 11 in the region X of FIG. 1 in the second embodiment.
  • the display area 4, the frame area 5a, and the frame area 5b are set as described in FIG. 3, and are further circled as described in FIG. 4 in the first embodiment.
  • the columnar spacers 11a are arranged in the display area 4, the frame area 5a, and the frame area 5b at equal pitches so that the number of arrangements per area is equal. Further, the columnar spacers 11b represented by double circles are arranged only in the frame region 5a, but in the second embodiment, the columnar spacers 11b are evenly arranged at the same pitch in the region of the frame region 5a. It is concentrated near the center of the corner of the notch.
  • the internal stress generated in the processing of the member and the panel manufacturing process remains inside the glass substrate and the polarizing plate, but when the outer peripheral shape has a notch, both sides of the notch to the corner of the notch.
  • the cell gap 10 tends to fluctuate significantly in the center of the corner of the notch. Therefore, even in the region of the frame region 5a, by increasing the spacer arrangement density of the columnar spacer 11 particularly near the center of the corner portion of the notch, it is possible to more effectively suppress the fluctuation of the cell gap 10.
  • the columnar spacers 11b are arranged to be concentrated near the center of the corner of the notch in the frame region 5a, but the shape of the notch is not limited to the central portion, and the cell gap 10 is not limited to the central portion. Just place it. Further, depending on the shape of the notch, the region where the columnar spacer 11b is arranged may be a plurality of regions in the frame region 5a, and in that case, from the region where the columnar spacer 11b is arranged to the region end of the frame region 5a close to the region. The columnar spacers 11 may be arranged so that the spacer arrangement density is low.
  • the spacer arrangement density of the columnar spacer 11 indicates the sum of the areas of the columnar spacer 11 arranged per unit area of the substrate surface on which the spacer is arranged in a plan view as described above. Therefore, even if the spacer arrangement density is the same, a small number of columnar spacers 11 having a large diameter may be arranged if the area is large in a plan view, that is, if it is cylindrical, and the area in a plan view is small, that is, a cylinder. If this is the case, a large number of columnar spacers 11 having a small diameter may be arranged.
  • a dual spacer structure may be used to further control the fluctuation of the cell gap 10.
  • Two types of columnar spacers 11 having different heights from the dual spacer structure are provided, and the high main spacer is always in contact with the array substrate 1 and the color filter substrate 2 to maintain the cell gap 10, while the height is low.
  • the subspacer is in contact with only one of the array substrate 1 and the color filter substrate 2 and does not contribute to the maintenance of the cell gap 10, and only when the cell gap 10 becomes narrower than a certain level, the array substrate 1 and the color filter substrate 2 are used. It is in contact with both of 2 and contributes to the maintenance of the cell gap 10.
  • the gap unevenness of the notch is suppressed by adopting the method of arranging the columnar spacer 11 of the present disclosure for the arrangement of the main spacer having a high height for the liquid crystal panel adopting the dual spacer structure.
  • the effect of can be obtained.
  • the arrangement method of the present disclosure may be adopted for the arrangement of the main spacers by adopting a dual spacer structure in the area of the display area 4 and arranging only the main spacers in the area of the frame area 5.
  • Embodiment 3 In the first and second embodiments, the liquid crystal panel 101 in which the gap unevenness at the corner of the notch is suppressed by increasing the spacer arrangement density of the frame region 5a with respect to the other regions has been described.
  • the third embodiment not the columnar spacer 11 but the dummy seal 21 having a spacer function is arranged in the frame region 5a.
  • FIG. 6 is a plan view showing the arrangement of the columnar spacer 11 and the dummy seal 21 in the region X of FIG. 1 in the third embodiment.
  • the display area 4, the frame area 5a, and the frame area 5b are set as described with reference to FIG. 3, and the display area 4 and the frame area 5b are circled as in the first embodiment.
  • the columnar spacers 11 shown in (1) are arranged at equal pitches so that the number of arrangements per area is equal.
  • the dummy seal 21 formed at the same time as the seal 9 is arranged only in the frame region 5a.
  • the dummy seal 21 is made of the same material as the seal 9 at the same time and has the same height.
  • the shapes such as the area and the width are not limited to those shown in FIG. 6, and may be set according to the situation.
  • one dummy seal 21 is formed independently in the frame region 5b, but the present invention is not limited to this, and a plurality of dummy seals 21 may be formed, and the dummy seal 21 and the columnar spacer may be formed. 11 may be arranged together.
  • the seal 9 originally surrounds the liquid crystal of the liquid crystal layer 3 and seals it between the array substrate 1 and the color filter substrate 2, but at the same time, it also plays the role of a spacer that maintains the cell gap 10 within a certain range. Therefore, by arranging the dummy seal 21 having the same height as the seal 9 in the frame region 5a as shown in the third embodiment, the dummy seal 21 also functions as a spacer for maintaining the cell gap 10 in the notch portion. be able to.
  • Embodiment 4 In the first and second embodiments, the spacer arrangement density of the frame region 5a is shown to be higher than that of the frame region 5b. In the fourth embodiment, a mode in which the spacer height of the frame region 5a is made higher than that of the frame region 5b will be described.
  • 7 is a plan view showing the arrangement of the columnar spacer 11 in the region X of FIG. 1 in the fourth embodiment, and FIGS. 8 and 9 are cross-sectional views showing a cross section of ZZ of FIG. 7. Further, FIG. 8 shows before the array substrate 1 and the color filter substrate 2 are bonded, and FIG. 9 shows the state after the bonding.
  • the display area 4, the frame area 5a, and the frame area 5b are set as described with reference to FIG.
  • the columnar spacers 11a shown in (1) are arranged at equal pitches so that the number of arrangements per area is equal.
  • the columnar spacer 11c having the same cross-sectional area as the columnar spacer 11a and having a high height is arranged only in the frame region 5a.
  • the columnar spacer 11c is shown as a square, which is displayed in this way for convenience of description, and the shape of the columnar spacer 11c in a plan view is the same as that of the columnar spacer 11a. As shown in FIG.
  • the height hc of the columnar spacer 11c is higher than the height ha of the columnar spacer 11a before the array substrate 1 and the color filter substrate 2 are bonded together (hc> ha).
  • a halftone mask having a gray color tone other than black and white may be used as the mask used for exposure in the process of forming the columnar spacers 11.
  • a convex pattern may be provided on the surface of the color filter substrate 2 facing the liquid crystal layer 3, and the columnar spacer 11c may be arranged so as to overlap the pattern.
  • the columnar spacer 11c is deformed and crushed more than the columnar spacer 11a by the thickness of the pattern of the coloring material 6. It becomes (hc' ⁇ ha') and has the same effect as the above-mentioned form in which the columnar spacer 11c itself is raised.
  • This form can be realized, for example, by forming a pattern of the coloring material 6 at a position where the columnar spacer 11 of the frame region 5b is arranged in the step of forming the coloring material 6 in the display region 4 of the color filter substrate 2. .. Alternatively, it may be formed by a photocurable type overcoat.
  • the same effect can be obtained by providing a convex pattern on the surface of the array substrate 1 facing the liquid crystal layer 3 and arranging the columnar spacer 11c so as to overlap the pattern.
  • This form can be realized, for example, by forming an insulating film pattern for insulating the gate wiring and the source wiring of the array substrate 1 only at the position where the columnar spacer 11c of the frame region 5a is arranged.
  • Increasing the height of the columnar spacer 11 in a certain region as shown in the fourth embodiment has the same effect as increasing the spacer arrangement density of the columnar spacer 11 shown in the first and second embodiments. .. Therefore, the form of changing the spacer arrangement density of the columnar spacer 11 in the display area 4, the frame area 5a, and the frame area 5b shown in the first embodiment is the same as the form of arranging the columnar spacers 11 having different heights of the columnar spacers 11. It works. Further, the form of changing the spacer arrangement density of the columnar spacers 11 in the region of the frame region 5a as in the second embodiment has the same effect as the form of arranging the columnar spacers 11 having different heights of the columnar spacers 11.
  • FIG. 12 is a plan view of the liquid crystal display device according to the fifth embodiment of the present disclosure.
  • the liquid crystal display device is a liquid crystal panel 101 which is a non-rectangular display.
  • the seal 9 is arranged inside the outer periphery, and the liquid crystal layer 3 is formed inside the seal 9. Further, the liquid crystal layer 3 includes a display area 4 for displaying an image.
  • the liquid crystal panel 101 has an outer peripheral shape in which notches are formed in the upper right and upper left corners of the paper surface with respect to a virtual rectangle, and the liquid crystal layer 3 and the display area 4 (first) surrounded by the seal 9.
  • the region also has a shape having a notch.
  • the non-display area on the peripheral edge of the liquid crystal layer 3 surrounded by the sticker 9 and the display area 4 is defined as the frame area 5.
  • the frame area 5 is an area inside the seal 9 that does not contribute to the display.
  • the outer peripheral shape of the corner portion of the cutout portion of the liquid crystal panel 101 shown in the region S surrounded by the dotted line is an outer peripheral shape in which the corners where the sides intersect are given a smoothly changing curved shape. This is a shape that takes into consideration not only the design but also the suppression of the occurrence of polarizing plate cracks due to the stress concentration of the glass substrate and the polarizing plate constituting the liquid crystal panel 101 and the outer shape processability of the glass substrate.
  • the shape may not be a smooth curved line, but may be an angle at which a straight line intersects.
  • the seal 9 also has an outer peripheral shape with a smooth curved shape at the corner, but this is not only to correspond to the outer peripheral shape of the liquid crystal panel 101, but also to make the width and height of the seal 9 constant. It also depends on the fact that a smooth curved shape is easier to handle than a corner when forming it so that it becomes.
  • FIG. 13 is a cross-sectional view showing a cross section of ⁇ - ⁇ in FIG. 12 of the liquid crystal panel 101.
  • the liquid crystal panel 101 has a structure in which an array substrate 1 and a color filter substrate 2 sandwich and bond a liquid crystal layer 3 made of a liquid crystal, and has an FFS (Flinge Field Withing) drive method.
  • FFS Field Withing
  • pixels are formed in a matrix by orthogonal scanning signal lines and display signal lines on the surface of the array substrate 1 facing the liquid crystal layer 3 corresponding to the display area 4 for displaying an image, and each pixel has a liquid crystal display.
  • a pixel electrode and a common electrode are formed via an insulating layer, and a TFT (Thin Film Transistor), which is a switching element that gives a potential to the pixel electrode, is provided.
  • a TFT Thin Film Transistor
  • a color material 6 having a color such as RGB corresponding to each pixel a black matrix 7 that shields wiring between pixels and a TFT region from light, and a color material 6
  • An overcoat film 8 is formed to protect the surface.
  • the black matrix 7 and the overcoat film 8 are further extended to the frame region 5 to shield the periphery of the display region 4 from light.
  • a polarizing plate is attached to the surface of the array substrate 1 and the color filter substrate 2 that does not face the liquid crystal layer 3, and the surface of the array substrate 1 and the color filter substrate 2 faces the liquid crystal layer 3. Is formed with an alignment film that orients the liquid crystal display.
  • the liquid crystal layer 3 is surrounded by a seal 9 and sealed between the array substrate 1 and the color filter substrate 2.
  • the distance between the array substrate 1 and the color filter substrate 2 is particularly referred to as a cell gap 10. Since the liquid crystal is sealed so as to fill the cell gap 10, the cell gap 10 is equal to the thickness of the liquid crystal layer 3.
  • An elastic member such as silicon rubber is used for the seal 9. Therefore, the seal 9 has a role of sealing the liquid crystal display and also a role of a spacer for maintaining the cell gap 10.
  • a columnar spacer 11 is formed on the surface of the color filter substrate 2 facing the liquid crystal layer 3. Therefore, in the present embodiment, the color filter substrate 2 is the first substrate and the array substrate 1 is the second substrate.
  • the columnar spacer 11 is arranged so as to be sandwiched between the array substrate 1 and the color filter substrate 2, and functions as a support material for maintaining the cell gap 10 in a certain range. Since the columnar spacer 11 is made of, for example, a UV photosensitive resin and is formed by pattern exposure using a mask, it can be accurately arranged at a desired position.
  • the liquid crystal does not exist in the portion where the columnar spacer 11 is located and the liquid crystal is not normally oriented in the region around the columnar spacer 11, it is not possible to control the transmission or shading of the light of the backlight in the vicinity of the columnar spacer 11. It becomes an area. Therefore, when the columnar spacer 11 is arranged in the display area 4, it is arranged so as to overlap the black matrix 7 in a plan view so as to be shielded from light so as not to affect the displayed image.
  • the columnar spacer 11 has a height larger than the assumed cell gap 10 before the array substrate 1 and the color filter substrate 2 are attached to each other, and the array substrate 1 and the color filter substrate 2 are attached to each other to form a predetermined cell.
  • the gap When the gap is 10, it is in a slightly crushed state.
  • the cell gap 10 becomes smaller due to an external force or a temperature change in the environment, it is suppressed to become smaller due to the repulsive force, and when the cell gap 10 becomes larger, the crushed portion by bonding is restored.
  • FIG. 14 is a plan view of the region S surrounded by the dotted line of the cutout portion of FIG.
  • the liquid crystal panel 101 has an outer peripheral shape in which a notch is formed, and the liquid crystal layer 3 surrounded by the seal 9 formed inside the outer periphery of the liquid crystal panel 101, and further the seal 9 thereof.
  • the display area 4 formed on the inside and displaying an image also has a shape having a notch.
  • the outer peripheral shape of the corner portion of the cutout portion of the liquid crystal panel 101 is not a corner where straight lines intersect, but a curved shape that smoothly changes into an arc shape from the viewpoint of designability, crack prevention, and workability.
  • the seal 9 also has an outer peripheral shape having a curved shape that changes smoothly instead of a corner so that the seal thickness and width can be easily controlled when the seal is formed. Further, the outer peripheral shape of the display area 4 also has a curved shape that smoothly changes at the corners.
  • the frame area 5 is divided into the following areas when the columnar spacer 11 is arranged. 14;
  • the portion is the first seal straight portion 99c. That is, assuming that the first direction is along the x-axis and the second direction is along the y-axis, the seal 9 at the notched portion is the first seal portion (first seal straight portion 99c) extending in the first direction. ),
  • the second seal portion (second seal straight line portion 99a) extending in the second direction whose inner angle differs from the first direction by 270 °, and the third seal portion (the third seal portion) that smoothly connects the first seal portion and the second seal portion.
  • the third seal curved portion 99b) is included.
  • the boundary point between the second seal portion (second seal straight portion 99a) and the third seal portion (third seal curved portion 99b) is point A
  • the third seal portion (third seal curved portion 99b) and the first seal is defined as the point B
  • the intersections of the second normal line 115 and the first normal line 116 drawn from the points A and B to the outer peripheral line 4a of the display area 4 with the outer peripheral line 4a are defined as points C and D.
  • the frame region 5 surrounded by the line segment AB of the third seal portion, the line segment BD of the first normal line 116, the line segment DC which is the outer periphery of the first normal region, and the line segment CA of the second normal line 115 is formed.
  • the sandwiched frame area 5 is particularly referred to as a line portion frame area 55b (third area).
  • FIG. 15 shows the arrangement of the columnar spacer 11 for each region described with reference to FIG.
  • the columnar spacers 11a shown by circles are arranged in the display area 4, the corner frame area 55a, and the line frame area 55b at equal pitches so that the number of arrangements per area is equal, and further double.
  • the columnar spacer 11b indicated by a circle is arranged only in the corner frame region 55a.
  • the columnar spacer 11a and the columnar spacer 11b are displayed differently for convenience of explanation, but are columnar spacers 11 having the same cross-sectional area and height and having the same specifications. That is, in the form shown in FIG.
  • the columnar spacer 11 in which the columnar spacer 11a and the columnar spacer 11b are combined has the highest spacer placement density in the square frame area 55a as compared with the display area 4 and the line frame area 55b.
  • the spacer placement density indicates the sum of the areas of the columnar spacers 11 arranged per unit area of the substrate surface in a plan view, that is, the area density.
  • the spacer arrangement density and arrangement of the columnar spacer 11a and the columnar spacer 11b may be freely set.
  • the spacer arrangement density of the columnar spacer 11 in the corner frame region 55a is set to be equal to or higher than the spacer arrangement density of the line frame region 55b. May be good. That is, the spacer placement density of the columnar spacer 11 may be (spacer placement density in the line frame region 55b) ⁇ (spacer placement density in the corner frame region 55a).
  • spacer arrangement density in the line portion frame area 55b ⁇ (spacer arrangement density in the display area 4) ⁇ (corner). It may be the spacer arrangement density in the part frame region 55a).
  • the elastic force of the spacer can be increased and the occurrence of this gap unevenness can be suppressed.
  • There are other methods for suppressing the gap unevenness around the corners of the notch For example, there is a method of arranging a gap holding member such as a spacer or a dummy seal in place of the spacer 9 in a region outside the seal 9.
  • a gap holding member such as a spacer or a dummy seal
  • the spacer placement density of the columnar spacer 11 is increased in a part of the frame area 5 that does not affect the display without being restricted by the black matrix 7, and the degree of freedom of placement is high and large. There is a merit that the effect can be easily obtained. It should be noted that these effects are remarkable when the internal angle formed by the first direction along which the first seal portion is along and the second direction along which the second seal portion is along is larger than 180 °. In the present embodiment, an example in which the internal angle formed by the first direction and the second direction is 270 ° has been introduced, but if this angle is larger than 180 ° and closer to 360 °, the effect of the present disclosure becomes stronger.
  • Embodiment 6 In the fifth embodiment, the spacer arrangement density of the columnar spacers 11 of the display area 4, the corner frame area 55a, and the line frame area 55b is shown so that the corner frame area 55a has the highest spacer arrangement density. .. In the sixth embodiment, the arrangement of the columnar spacer 11 in the area of the corner frame region 55a will be further described.
  • FIG. 16 is a plan view showing the arrangement of the columnar spacer 11 in the region S of FIG. 12 in the sixth embodiment. In FIG. 16, the display area 4, the corner frame area 55a, and the line frame area 55b are set as described in FIG. 14, and further, the same as that described in FIG. 15 in the fifth embodiment.
  • the columnar spacers 11a indicated by circles are arranged in the display area 4, the corner frame area 55a, and the line frame area 55b at equal pitches so that the number of arrangements per area is equal. Further, the columnar spacers 11b represented by double circles are arranged only in the corner frame region 55a, but in the sixth embodiment, the columnar spacers 11b are arranged at the same pitch in the region of the corner frame region 55a. It is not evenly arranged, but is concentrated near the center of the corner of the notch (near the intersection of the straight line of the first seal portion and the straight line of the second seal portion). In short, the spacer placement density in the corner frame region 55a (second region) is high in the central portion and decreases as it approaches the first normal 116 or the second normal 115.
  • the internal stress generated in the processing of the member and the panel manufacturing process remains inside the glass substrate and the polarizing plate, but if the outer peripheral shape has a notch, cut from both sides of the notch. It concentrates toward the corner portion of the notch portion, and the fluctuation of the cell gap 10 tends to be particularly large in the center of the corner portion of the notch portion. Therefore, it is possible to more effectively suppress the fluctuation of the cell gap 10 by increasing the spacer arrangement density of the columnar spacer 11 particularly near the center of the corner portion of the notch portion even in the region of the corner frame region 55a. It becomes.
  • the columnar spacers 11b are arranged to be concentrated near the center of the corner portion of the notch portion in the region of the corner frame region 55a, but the shape of the notch portion is not limited to the central portion, and the cell gap 10 It may be arranged in the area where the fluctuation of is large. Further, depending on the shape of the notch portion, the region in which the columnar spacer 11b is arranged may be a plurality of regions in the corner frame region 55a, and in that case, the region in which the columnar spacer 11b is arranged is close to the corner frame. The columnar spacer 11 may be arranged so that the spacer placement density is lowered toward the region end of the region 55a.
  • the spacer arrangement density of the columnar spacer 11 indicates the sum of the areas of the columnar spacer 11 arranged per unit area of the substrate surface on which the spacer is arranged in a plan view as described above. Therefore, even if the spacer arrangement density is the same, a small number of columnar spacers 11 having a large diameter may be arranged if the area is large in a plan view, that is, if it is cylindrical, and the area in a plan view is small, that is, a cylinder. If this is the case, a large number of columnar spacers 11 having a small diameter may be arranged.
  • a dual spacer structure may be used to further control the fluctuation of the cell gap 10.
  • Two types of columnar spacers 11 having different heights from the dual spacer structure are provided, and the high main spacer is always in contact with the array substrate 1 and the color filter substrate 2 to maintain the cell gap 10, while the height is low.
  • the subspacer is in contact with only one of the array substrate 1 and the color filter substrate 2 and does not contribute to the maintenance of the cell gap 10, and only when the cell gap 10 becomes narrower than a certain level, the array substrate 1 and the color filter substrate 2 are used. It is in contact with both of 2 and contributes to the maintenance of the cell gap 10.
  • the gap of the notch portion is formed by adopting the arrangement method of the columnar spacer 11 of the present disclosure with respect to the arrangement of the main spacer having a high height.
  • the effect of suppressing unevenness can be obtained.
  • the arrangement method of the present disclosure may be adopted for the arrangement of the main spacers by adopting a dual spacer structure in the area of the display area 4 and arranging only the main spacers in the area of the frame area 5.
  • Embodiment 7 In the fifth and sixth embodiments, the liquid crystal panel 101 has been described in which the gap unevenness in the corner portion of the cutout portion is suppressed by increasing the spacer arrangement density of the corner frame region 55a with respect to the other regions.
  • a dummy seal 21 having a spacer function is arranged in the corner frame region 55a instead of the columnar spacer 11.
  • FIG. 17 is a plan view showing the arrangement of the columnar spacer 11 and the dummy seal 21 in the region S of FIG. 12 in the seventh embodiment.
  • the display area 4, the corner frame area 55a, and the line frame area 55b are set in the same manner as described with reference to FIG. 14, and further, the display area 4 and the line frame area 55b are implemented.
  • the columnar spacers 11 represented by circles are arranged at equal pitches so that the number of arrangements per area is equal.
  • the dummy seal 21 formed at the same time as the seal 9 is arranged only in the corner frame region 55a.
  • the dummy seal 21 is made of the same material as the seal 9 at the same time and has the same height.
  • the shapes such as the area and the width are not limited to those shown in FIG. 17, and may be set according to the situation.
  • one dummy seal 21 is formed independently in the line portion frame region 55b, but the present invention is not limited to this, and a plurality of dummy seals 21 may be formed, and the dummy seal 21 and the dummy seal 21 may be formed.
  • the columnar spacers 11 may be arranged together.
  • the seal 9 originally surrounds the liquid crystal of the liquid crystal layer 3 and seals it between the array substrate 1 and the color filter substrate 2, but at the same time, it also plays the role of a spacer that maintains the cell gap 10 within a certain range.
  • the dummy seal 21 can also be used as a spacer for maintaining the cell gap 10 in the notched portion. Can fulfill the function of.
  • FIG. 18 is a plan view showing the arrangement of the columnar spacer 11 in the region S of FIG. 12 in the present embodiment 8, and FIGS. 19 and 20 are cross-sectional views showing a cross section of ⁇ - ⁇ of FIG. Further, FIG. 19 shows before bonding the array substrate 1 and the color filter substrate 2, and FIG. 20 shows after bonding.
  • FIG. 19 shows before bonding the array substrate 1 and the color filter substrate 2, and FIG. 20 shows after bonding.
  • the display area 4, the corner frame area 55a, and the line frame area 55b are set in the same manner as described with reference to FIG. 14, and further, the display area 4 and the line frame area 55b are implemented. Similar to the fifth embodiment, the columnar spacers 11a represented by circles are arranged at equal pitches so that the number of arrangements per area is equal. In the eighth embodiment, the columnar spacer 11c having the same cross-sectional area as the columnar spacer 11a and having a high height is arranged only in the corner frame region 55a. In FIG. 18, the columnar spacer 11c is shown as a square, which is displayed in this way for convenience of description, and the shape of the columnar spacer 11c in a plan view is the same as that of the columnar spacer 11a.
  • the height hc of the columnar spacer 11c is higher than the height ha of the columnar spacer 11a before the array substrate 1 and the color filter substrate 2 are bonded together (hc> ha).
  • a convex pattern may be provided on the surface of the color filter substrate 2 facing the liquid crystal layer 3, and the columnar spacer 11c may be arranged so as to overlap the pattern.
  • the columnar spacer 11c is deformed and crushed more than the columnar spacer 11a by the thickness of the pattern of the coloring material 6. It becomes (hc' ⁇ ha') and has the same effect as the above-mentioned form in which the columnar spacer 11c itself is raised.
  • This form is realized, for example, by forming a pattern of the coloring material 6 at a position where the columnar spacer 11 of the line portion frame region 55b is arranged in the step of forming the coloring material 6 in the display region 4 of the color filter substrate 2. Can be done. Alternatively, it may be formed by a photocurable type overcoat.
  • the same effect can be obtained by providing a convex pattern on the surface of the array substrate 1 facing the liquid crystal layer 3 and arranging the columnar spacer 11c so as to overlap the pattern.
  • This embodiment can be realized, for example, by forming an insulating film pattern for insulating the gate wiring and the source wiring of the array substrate 1 only at the position where the columnar spacer 11c of the corner frame region 55a is arranged.
  • Increasing the height of the columnar spacer 11 in a certain region as shown in the eighth embodiment has the same effect as increasing the spacer arrangement density of the columnar spacer 11 shown in the fifth and sixth embodiments. .. Therefore, in the form of changing the spacer arrangement density of the columnar spacer 11 in the display area 4, the corner frame area 55a, and the line frame area 55b shown in the fifth embodiment, the columnar spacers 11 having different heights are arranged. However, the same effect is achieved. Further, the form of changing the spacer arrangement density of the columnar spacer 11 in the region of the corner frame region 55a as in the sixth embodiment has the same effect as the form of arranging the columnar spacers 11 having different heights of the columnar spacer 11. ..
  • the liquid crystal drive method is not limited to the FFS method, and the TN (Twisted Nematic) method, the Implain-Switching method, and the like are used. , Even if it is another method, the same effect is obtained. Further, although the form in which the columnar spacer 11 is arranged on the color filter substrate 2 has been described, the same effect can be obtained even if the columnar spacer 11 is arranged on the array substrate 1.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
PCT/JP2021/024792 2020-06-30 2021-06-30 液晶表示装置 Ceased WO2022004799A1 (ja)

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US18/003,826 US12072585B2 (en) 2020-06-30 2021-06-30 Liquid crystal display device
KR1020227045051A KR102879805B1 (ko) 2020-06-30 2021-06-30 액정 표시 장치
CN202180044346.XA CN115956219B (zh) 2020-06-30 2021-06-30 液晶显示装置
JP2022534086A JP7712930B2 (ja) 2020-06-30 2021-06-30 液晶表示装置
EP21834192.3A EP4174562A4 (en) 2020-06-30 2021-06-30 LIQUID CRYSTAL DISPLAY DEVICE

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JP2020-112973 2020-06-30
JP2020112973 2020-06-30
JP2021-106141 2021-06-25
JP2021106141 2021-06-25

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CN116699910A (zh) * 2023-04-27 2023-09-05 京东方科技集团股份有限公司 显示基板、液晶显示面板以及显示基板的制作方法

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US12072585B2 (en) 2024-08-27
US20230258985A1 (en) 2023-08-17
CN115956219A (zh) 2023-04-11
KR102879805B1 (ko) 2025-10-31
EP4174562A1 (en) 2023-05-03
TW202225801A (zh) 2022-07-01
JPWO2022004799A1 (https=) 2022-01-06
CN115956219B (zh) 2025-05-09
JP7712930B2 (ja) 2025-07-24
KR20230028297A (ko) 2023-02-28
TWI896697B (zh) 2025-09-11

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