WO2005038518A1 - スペーサ付き基板、パネル、液晶表示パネル、パネルの製造方法および液晶表示パネルの製造方法 - Google Patents
スペーサ付き基板、パネル、液晶表示パネル、パネルの製造方法および液晶表示パネルの製造方法 Download PDFInfo
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- WO2005038518A1 WO2005038518A1 PCT/JP2004/014927 JP2004014927W WO2005038518A1 WO 2005038518 A1 WO2005038518 A1 WO 2005038518A1 JP 2004014927 W JP2004014927 W JP 2004014927W WO 2005038518 A1 WO2005038518 A1 WO 2005038518A1
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- spacer
- liquid crystal
- substrates
- sealing material
- columnar
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Classifications
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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
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
-
- 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
- G02F1/1341—Filling or closing 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
- G02F1/13396—Spacers having different sizes
Definitions
- Substrate with spacer, panel, liquid crystal display panel, panel manufacturing method, and liquid crystal display panel manufacturing method are included.
- the present invention relates to a liquid crystal display panel and a method for manufacturing the same.
- the present invention relates to a liquid crystal display panel including a columnar spacer and a method for manufacturing the same.
- the present invention also relates to a spacer-attached substrate having a spacer formed on the substrate.
- the gap between both substrates can be kept constant.
- a liquid crystal display panel has a substrate on which a driving element for driving liquid crystal is formed and a substrate on which a counter electrode and the like are formed are several ⁇ m thick so that their main surfaces face each other. It has a configuration that is bonded at intervals of. The liquid crystal is sealed between the two bonded substrates.
- FIG. 11 shows a schematic cross-sectional view of a liquid crystal display panel based on a conventional technique.
- a driving element, a counter electrode, an alignment film, and the like formed on the main surface of the substrate are omitted.
- the substrate la and the substrate lb are bonded together using the sealing material 2 such that their main surfaces face each other.
- Liquid crystal 6 is sealed in the space surrounded by the two substrates la and lb and the sealing material 2. Further, the space between the substrate la and the substrate lb is defined by the columnar spacers 5 arranged in this space.
- One of the liquid crystal sealing methods based on the conventional technology is a method called a vacuum injection method.
- a vacuum injection method first, two substrates are bonded together while applying pressure using a sealing material so that the main surfaces face each other.
- the sealing material is formed in an annular shape, and an opening is formed in a part of the annular sealing material.
- the distance between the two substrates reaches a predetermined value
- the bonded substrate is cut into a predetermined display panel size.
- the cut substrate is placed inside a vacuum container, and the inside of the vacuum container is evacuated, so that the gap between the substrates is also evacuated. After sufficiently evacuating, the liquid crystal is brought into contact with the opening of the sealing material, and the vacuum container is opened to atmospheric pressure.
- the liquid crystal is injected into the gap between the substrates due to the pressure difference between the pressure between the substrates and the atmospheric pressure and the surface tension of the liquid crystal. After the liquid crystal has been injected to a predetermined amount, the opening of the sealing material is sealed, and the liquid crystal can be sealed.
- Such a method of sealing liquid crystal by the vacuum injection method has a problem that the injection time increases as the size of the liquid crystal display panel increases.
- a liquid crystal sealing method called a drop bonding method has been performed (see, for example, JP-A-2001-281678).
- a driving element, a counter electrode, and the like are formed on two substrates. Further, a spacer for fixing the interval between the substrates is arranged on one of the two substrates.
- a sealing material for bonding the two substrates is annularly arranged on the main surface of one or both substrates. At this time, the sealing material is arranged in a closed annular shape without forming an opening.
- a predetermined amount of liquid crystal is dropped on one of the substrates. After bonding these two substrates in a vacuum with good positional accuracy, they are released to atmospheric pressure. After that, the sealing material is cured and the liquid crystal is sealed between the two substrates.
- An interval between two substrates is determined by a spacer.
- spherical plastic beads or the like have been used as spacers.
- the liquid crystal material is lost in a portion where the plastic beads are present, and the light from the backlight leaks without being aligned, so-called light leakage occurs.
- a columnar spacer (referred to as a “columnar spacer” in the present invention) has been formed as a spacer on a substrate to adjust the distance between the substrates. (See, for example, JP-A-2003-131238).
- the columnar spacer is disposed in a region where the wiring between the picture elements is formed, and can prevent light leakage or the like. Also, when the display screen of the liquid crystal display panel is pressed with a finger etc.
- the columnar structure spacer is formed by applying a photosensitive resin on a substrate and patterning the photosensitive resin by a photolithography method.
- the columnar structure spacer can be formed at a desired position in the substrate surface, and does not move in the substrate surface, so that display unevenness does not occur.
- the height of the force can be set freely according to the manufacturing conditions. Since the liquid crystal material thermally expands in a high temperature state, when a spacer having a columnar structure is used, display unevenness occurs due to in-plane nonuniform cell gap.
- Japanese Patent Application Laid-Open No. 2001-147437 discloses that display elasticity is stored in a columnar resin spacer so that display unevenness does not occur even with a temperature change.
- JP-A-2003-121857 and JP-A-2003-131238 disclose the height and cross-sectional area of a liquid crystal material so that display unevenness does not occur even when the liquid crystal material contracts or receives an excessive load in a low-temperature environment. It discloses that two or more different spacers are used.
- Japanese Patent Application Publication No. 2002-229040 discloses that a display defect due to local unevenness in cell thickness is prevented by forming a top portion of a columnar spacer in a concave or flat shape.
- the spacer described in the above-mentioned patent document has a high aspect ratio, so that in the step of rubbing the alignment film, the spacer that is easily elastically deformed is damaged, Function may not be fulfilled.
- the thickness (cell gap) of a liquid crystal layer is determined by the amount of liquid crystal material dropped.
- Japanese Patent Application Laid-Open No. 2001-281678 discloses that the height of a pillar of a columnar spacer is measured, and a liquid crystal drop amount is controlled based on the measured value. I have. Considering the measurement error, the accuracy of drop amount control, and the temperature change, the method disclosed in JP-A-2001-28178 is not sufficient.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-281678
- Patent Document 2 Japanese Patent Application Laid-Open No. 2003-131238
- Patent Document 3 JP 2001-147437 A
- Patent Document 4 JP 2003-121857 A
- Patent Document 5 Japanese Patent Application Laid-Open No. 2002-229040
- the columnar spacer is less likely to be crushed in the height direction (the thickness direction of the substrate) than plastic beads or the like.
- the amount of liquid crystal to be dropped is easy to control and can be dropped in a strict amount.
- the spacer height varies. For example, there is a possibility that the value may vary up to ⁇ 0.2 / z m from the design value. For this reason, it is difficult to adjust the amount of liquid crystal to be dropped in accordance with the height of the formed columnar spacer, and the display quality is degraded.
- FIG. 12A and FIG. 12B are explanatory diagrams of the problems of the liquid crystal display panel based on the conventional technology.
- the height of the column spacer 5 is lower than the design value, as shown in FIG. Since the top surface of the spacer 5 does not contact the substrate lb, the distance between the substrates cannot be made strictly constant. As a result, there is a problem that display quality is deteriorated.
- the height of the columnar spacer is higher than the design value, as shown in FIG. 12B, the liquid crystal 6 is completely contained in the space surrounded by the two substrates la and lb and the sealing material 2. There is a problem that display quality is degraded because vacuum bubbles 28 are generated without being filled.
- Japanese Patent Application Laid-Open No. 2001-281678 proposes measuring the height of a columnar spacer and determining the amount of liquid crystal to be dropped based on the measured value.
- the force that can adjust the amount of liquid crystal to be dropped according to the height of the columnar spacer is about 10 to 20 seconds per spot. Because it is powerful, measuring all columnar spacers is very time consuming.
- the height of the columnar spacers varies at least about ⁇ 0.1 m, so it is necessary to measure as many places as possible.
- An object of the present invention is to provide a liquid crystal display panel in which the display quality is prevented from deteriorating without complicating the bonding operation, and a method for manufacturing the same.
- Another object of the present invention is to reduce display unevenness due to in-plane nonuniform cell gap. Still another object of the present invention is to make the spacer hardly damaged by the rubbing process. Still another object of the present invention is to reduce display unevenness due to a change in temperature or an excessive or insufficient amount of liquid crystal dropped.
- the liquid crystal display panel is sealed in two regions fixed by a sealing material such that main surfaces face each other, and in a region surrounded by the two substrates and the sealing material. And a plurality of columnar spacers arranged in a region surrounded by the two substrates and the sealing material.
- the columnar spacers are arranged so that the number density gradually decreases from the center of the display area toward the outer periphery.
- the liquid crystal display panel is sealed in two regions fixed with a sealant such that main surfaces face each other, and in a region surrounded by the two substrates and the sealant. And a plurality of columnar spacers arranged in a region surrounded by the two substrates and the sealing material. In the first region near the inside of the sealing material, the number density of the columnar spacers is smaller than in the second region further inside the first region.
- the liquid crystal display panel is enclosed in two substrates fixed with a sealing material such that main surfaces face each other, and in a region surrounded by the two substrates and the sealing material. And a plurality of columnar spacers arranged in a region surrounded by the two substrates and the sealing material. In the first region avoiding the display region, the number density of the columnar spacers is smaller than that of the second region outside the first region.
- the liquid crystal display panel is sealed in two regions fixed with a sealing material such that the main surfaces face each other, and in a region surrounded by the two substrates and the sealing material.
- a plurality of columnar spacers arranged in a region surrounded by the two substrates and the sealing material.
- the columnar spacers include a first columnar spacer and a second columnar spacer having a higher unloaded height than the first columnar spacer.
- the first columnar spacer is disposed in the first region near the inside of the seal material and in the second region further inside the first region, and the second columnar spacer is disposed in the second region.
- a columnar spacer is formed on one or both of the two substrates to be bonded to each other.
- a columnar spacer is formed such that the central force of the display area to be formed is directed toward the outer peripheral portion so that the number density gradually decreases.
- a columnar spacer is formed on one or both of the two substrates to be bonded to each other.
- the method includes a spacer forming step and a seal material arranging step of arranging a seal material on a main surface of one or both of the two substrates to be bonded to each other.
- the columnar spacer is formed such that the number density of the columnar spacer in the first region near the inside of the sealing material is smaller than that of the second region further inside the first region.
- a columnar spacer is formed on one or both of the two substrates to be bonded to each other.
- the method includes a spacer forming step and a seal material arranging step of arranging a seal material on a main surface of one or both of the two substrates to be bonded to each other.
- the spacer forming step the columnar spacers are arranged such that the number density of the columnar spacers in the first region, which is outside the display region to be formed, is smaller than that of the second region outside the first region.
- the method includes a liquid crystal dropping step of dropping liquid crystal onto one of the two substrates, and the liquid crystal dropping step includes a step in which the two substrates are separated by a design value. Drop a smaller amount of liquid crystal than the value calculated when they are parallel to each other. By adopting this method, it is possible to more reliably prevent the display quality from deteriorating.
- a columnar spacer is formed on one or both of the two substrates to be bonded to each other. The method includes a spacer forming step and a seal material arranging step of arranging a seal material on one or both of the two substrates.
- the first columnar spacer and the first columnar spacer are provided in the first region near the inner side of the sealing material, and in the second region further inside the first region. Forming a second columnar spacer taller than the spacer.
- a substrate with a spacer according to the present invention is a substrate with a spacer having a substrate and a spacer formed on the substrate, wherein the spacer is provided with a first spacer portion. And a second spacer formed at the top of the first spacer. The diameter of the top of the first spacer is larger than the diameter of the bottom of the second spacer. Also long,.
- the upper portion of the first spacer portion preferably has a groove surrounding the second spacer portion in plan view.
- the diameter of the bottom of the spacer is 1.8 XC or more.
- the spacer diameter at a height of 0.85 XH from the bottom of the spacer is less than 1.05 XC! / ,.
- the panel of the present invention includes a substrate with a spacer of the present invention, an opposing substrate disposed to face the substrate with the spacer, and a functional material interposed between the substrate with the spacer and the opposing substrate.
- the functional material layer includes a layer whose light transmittance is modulated by a potential difference between electrodes facing each other, and a layer which emits light by current flowing between the electrodes facing each other.
- the method of the present invention is a method for manufacturing a liquid crystal panel by a liquid crystal drop bonding method.
- a step of forming a frame-shaped sealing material on one of the substrate surface of the spacer-attached substrate and the counter substrate a step of dropping a liquid crystal material into the frame of the sealing material, Bonding a substrate with a sensor and an opposing substrate to form a liquid crystal layer.
- the present invention it is possible to provide a liquid crystal display panel and a method of manufacturing the liquid crystal display panel in which a decrease in display quality is prevented without complicating a bonding operation.
- a uniform cell gap can be obtained in a plane.
- the spacer is less likely to be damaged by the rubbing process. According to still another aspect of the present invention, it is possible to reduce display unevenness due to a temperature change, an insufficient amount of a liquid crystal drop, or the like.
- FIG. 1A is a schematic sectional view of a first liquid crystal display panel according to Embodiment 1.
- FIG. 1B is a schematic plan view of a first liquid crystal display panel in Embodiment 1.
- FIG. 2A is a first plan view illustrating an arrangement state of columnar spacers in Embodiment 1.
- FIG. 2B is a second plan view illustrating an arrangement state of columnar spacers in Embodiment 1.
- FIG. 3A is a first schematic cross-sectional view illustrating an operation and an effect of the liquid crystal display panel in Embodiment 1.
- FIG. 3B is a second schematic cross-sectional view illustrating an operation and an effect of the liquid crystal display panel in Embodiment 1.
- FIG. 3C is a third schematic sectional view for explaining the function and effect of the liquid crystal display panel in the first embodiment.
- FIG. 4A is a first schematic plan view of a second liquid crystal display panel in Embodiment 1.
- FIG. 4B is a second schematic plan view of the second liquid crystal display panel in Embodiment 1.
- FIG. 5 is an explanatory diagram of a third liquid crystal display panel in Embodiment 1.
- FIG. 6 is an explanatory diagram of the method for manufacturing the liquid crystal display panel in the first embodiment.
- FIG. 7A is a first schematic cross-sectional view for explaining a state where a column spacer is compressed.
- FIG. 7B is a second schematic cross-sectional view for explaining the manner in which the column spacer is compressed.
- FIG. 8A is a schematic sectional view of a liquid crystal display panel according to Embodiment 2.
- FIG. 8B is a schematic plan view of the liquid crystal display panel in Embodiment 2.
- FIG. 9A is a first plan view illustrating an arrangement distribution of columnar spacers in Embodiment 2.
- FIG. 9B is a second plan view for explaining an arrangement distribution of columnar spacers in Embodiment 2.
- FIG. 10 is an explanatory diagram of the method for manufacturing the liquid crystal display panel in the second embodiment.
- FIG. 11 is a schematic sectional view of a liquid crystal display panel based on a conventional technique.
- FIG. 12A is a first schematic cross-sectional view for explaining a problem of a liquid crystal display panel based on a conventional technique.
- FIG. 12B is a second schematic cross-sectional view for explaining a problem of the liquid crystal display panel based on the conventional technique.
- FIG. 13 is a cross-sectional view schematically showing a liquid crystal panel using the substrate with spacer according to Embodiment 3.
- FIG. 14 is an enlarged sectional view schematically showing a spacer 105 according to a third embodiment.
- FIG. 15 is a plan view of a spacer 105 according to the third embodiment.
- FIG. 16 is a graph showing load-displacement characteristics of a spacer 105 according to the third embodiment.
- FIG. 17 is a cross-sectional view schematically showing a spacer 150 of a comparative example.
- FIG. 18 is a cross-sectional view for explaining a size of a spacer 105 according to the third embodiment.
- FIG. 19 is a cross-sectional view schematically showing a substrate with a spacer according to a fourth embodiment.
- FIG. 20 is a plan view of a substrate with a spacer according to a fourth embodiment.
- FIG. 21A is a plan view (upper view) and a cross-sectional view (lower view) schematically showing a spacer according to Embodiment 5.
- FIG. 21B is a plan view (upper view) and a cross-sectional view (lower view) schematically showing the spacer of the sixth embodiment.
- FIG. 1A and FIG. 2B are explanatory views of the first liquid crystal display panel in the present embodiment.
- FIG. 1A is a schematic sectional view
- FIG. 1B is a schematic plan view.
- two substrates, a substrate la and a substrate lb are bonded and fixed to each other with a sealing material 2.
- Driving elements are formed on the main surface of the substrate la, and counter electrodes are formed on the main surface of the substrate lb (not shown).
- the liquid crystal 6 is sealed in a region surrounded by the two substrates la and lb and the sealing material 2.
- the substrate la and the substrate lb are bonded and fixed at an interval. The distance between the two substrates is determined by the columnar spacer 5.
- the columnar spacer 5 is disposed in a region in which liquid crystal is sealed.
- the columnar spacer 5 is formed in a columnar shape, and the upper surface and the lower surface are in contact with the respective substrates.
- the first liquid crystal display panel in the present embodiment includes a low-density region 32 as a first region near the inside of the sealing material 2. Further, a high-density region 31 as a second region is included inside the low-density region 32.
- the number density of the columnar spacers 5 in the low-density region 32 is smaller than that in the high-density region 31.
- the region surrounded by the sealing material 2 is composed of two regions, and the number density of the columnar spacers 5 is higher in the inner region than in the outer region.
- the sealing material 2 is arranged along the outer edge of the substrate 1b.
- an area having a width of 3 mm from the sealing material 2 toward the center of the display area is the low-density area 32.
- the interval between the substrates la and lb in the high-density region 31 is substantially constant.
- the distance between the substrates la and lb in the low-density region 32 is almost constant or gradually narrows from the center of the display region toward the outside.
- FIGS. 2A and 2B are explanatory diagrams showing a state where the columnar spacers 5 are arranged.
- FIG. 2A is a plan view of the high-density region 31 and FIG. is there. Pillar The sa 5 is arranged in a wiring region formed at the boundary between the picture elements 7.
- the number density of the columnar spacers 5 arranged in the high-density region 31 is higher than the number density of the columnar spacers 5 arranged in the low-density region 32.
- a columnar spacer of ⁇ 10 / ⁇ and 4.5 m high is used.
- the low-density region in FIG. 2B one columnar spacer 5 of the same shape is arranged for every 15 picture elements.
- the liquid crystal sealed in the present embodiment is slightly smaller than a calculated value when two substrates are parallel to each other with a space between design values (hereinafter referred to as “standard liquid crystal calculated value”). A small amount is enclosed. In the present embodiment, 96% of the calculated value of the standard liquid crystal is enclosed.
- FIG. 3A to FIG. 3C are cross-sectional views illustrating the operation and effect of the first liquid crystal display panel in the present embodiment.
- the amount of liquid crystal dropped can be strictly adjusted, it is difficult to form the height of the columnar spacer as designed. For this reason, a manufacturing error is likely to occur in the height of the columnar spacer.
- FIG. 3A is a cross-sectional view when the columnar spacer 5 is formed at a height as designed.
- the amount of the enclosed liquid crystal is 96%, which is slightly smaller than the calculated value of the standard liquid crystal.
- the columnar spacer 5 is hardly compressed in the height direction, but can be compressed if it is slight. Accordingly, as shown in FIG.
- the distance between the two substrates la and lb is increased. Becomes constant. Since the height of the columnar spacer 5 is low, the space surrounded by the substrates la and lb and the sealing material 2 defined by the columnar spacer becomes small. As a result, the amount of liquid crystal that was intentionally reduced and the volume of the space surrounded by the substrates la and lb and the sealing material 2 were reduced. In general, even in the low-density region 32, the main surfaces of the two substrates la and lb are parallel to each other.
- the central force of the display area is also directed outward and the substrate la
- the spacing between lbs is reduced.
- the amount of the liquid crystal 6 sealed in the space surrounded by the substrates la and lb and the sealing material 2 is reduced.
- the number density of the columnar spacers 5 is formed higher than in the low-density region 32, so that in the high-density region 31, the distance between the two substrates la and lb is almost constant. become.
- the substrate la, lb gradually decreases from the center of the display region toward the outer periphery (from the high-density region 31 to the low-density region 32). The distance between them becomes smaller.
- the number density is smaller than the high-density area in the central part of the display area, and the low-density area is formed.
- the amount of liquid crystal to be sealed may be slightly smaller than the calculated value of the standard liquid crystal when two substrates are parallel to each other with a space between design values. preferable.
- the low-density region is formed near the inside of the sealing material.
- the outer peripheral portion of the display area where an image or the like is displayed is formed so as to face the outer side where the sealing material is disposed.
- the present invention is not limited to this mode. It may be formed. However, if there is a possibility that the surface of the part where the image is displayed may be pressed with a finger or the like, the image may be uneven when the part of the low density area is pressed. It is preferable that the low-density region be formed at the center of the display region and the low-density region be formed at the periphery of the display region. For example, when a button is operated on the display panel of a mobile phone, the user may accidentally press the display panel. By forming the density region in the peripheral portion, it is possible to prevent the occurrence of unevenness in the displayed image.
- FIG. 4A and FIG. 4B show schematic plan views of the second liquid crystal display panel in the present embodiment.
- the liquid crystal display panel shown in FIGS. 4A and 4B is a so-called CGS (Continuous Grain Silicon) liquid crystal system in which a circuit for operating a TFT for switching liquid crystal is formed on a glass substrate.
- CGS liquid crystals are used in display panels for digital still cameras and mobile phones.
- the main surface of the glass substrate 3 has a display area 35 including a TFT (Thin Film Transistor) formed thereon, and a driver for driving the TFT is provided on the main surface of the glass substrate 3. 10 are formed.
- the area in which the liquid crystal is sealed is a display area 35 and a liquid crystal sealing area 38 completely surrounding the driver 10.
- a BM region 39 in which a black mask or the like is formed on one substrate is formed.
- the BM region 39 is a region that is covered with the mask and the inside cannot be seen when the front side force of the liquid crystal display panel is also viewed.
- the low-density area 32 is formed along the outer edge of the display area 35. Areas other than the low density area 32 in the liquid crystal sealing area 38 are high density areas. That is, the columnar spacers are formed so that the number density is larger than that of the low density region 32.
- the present invention can be applied to a liquid crystal display panel such as a CGS liquid crystal.
- FIG. 4B shows a liquid crystal display panel of a CGS liquid crystal in which a low-density region 32 is formed in a region other than the display region 35.
- the entire display area 35 can be made a high-density area.
- the low-density region 32 can be formed at any position that does not need to include a part of the display region. For example, only the area between the sealing material and the display area may be a low-density area.
- FIG. 5 is an explanatory diagram of a third liquid crystal display panel in the present embodiment.
- the third liquid crystal display panel is formed such that the central force of the display area is also directed to the outer peripheral portion, as indicated by an arrow 51, so that the number density of the columnar spacers 5 gradually decreases. .
- This configuration By employing this, the same effect as that of the first liquid crystal display panel in the present embodiment can be obtained. Also in this case, it is preferable that the amount of the enclosed liquid crystal is slightly smaller than the calculated value of the standard liquid crystal.
- the liquid crystal display panel shown in FIG. 5 is a case where the amount of liquid crystal is slightly reduced, and the columnar spacer 5 is formed as designed.
- the gap between the substrate la and the substrate lb gradually decreases toward the center of the display area and toward the outer periphery.
- the manufacturing method according to the present embodiment includes a spacer forming step of forming a columnar spacer on one or both of the two substrates to be bonded to each other, and a spacer forming step.
- the method includes a liquid crystal dropping step of dropping a liquid crystal onto one of the substrates in a region that is to be inside the sealing material annularly arranged on one of the substrates.
- the manufacturing method in the present embodiment is a so-called drop bonding method in which two substrates are bonded in a vacuum after a liquid crystal dropping step.
- the description of the manufacturing method according to the present embodiment will be made mainly for the method of manufacturing the first liquid crystal display panel.
- FIG. 6 is a schematic sectional view when two substrates are bonded together.
- columnar spacers 5 having substantially the same height are formed by a photolithography method in a spacer forming step.
- the columnar spacer 5 is formed in a region where liquid crystal is to be sealed.
- a high-density area 31 having a high number density of the columnar spacers 5 is formed, and outside the high-density area 31 and near the inside of the annular sealing material 2, a number density is provided. Is smaller than the high-density region 31 and the low-density region 32 is formed.
- the sealing material 2 On the main surface of the substrate la, the sealing material 2 is disposed in a ring shape.
- the liquid crystal 6 is dropped on a region surrounded by the sealing material 2 on the main surface of the substrate la.
- the amount of liquid crystal 6 dropped in the present embodiment is slightly smaller than the design value when the two substrates are parallel to each other with a gap between the design values.
- the two substrates are bonded to each other.
- the bonding is performed in a vacuum.
- the outside is released to atmospheric pressure after bonding, the entire surface of the two substrates la and lb Atmospheric pressure is applied to compress the substrates la and lb.
- FIGS. 7A and 7B are schematic enlarged cross-sectional views of a columnar spacer when two substrates la and lb are bonded to each other.
- FIG. 7A is a schematic enlarged sectional view of a columnar spacer formed on a substrate.
- the columnar spacer 5 formed on the main surface of the substrate lb is formed in a columnar shape in which the diameter of the top surface is slightly smaller than the diameter of the bottom surface.
- the columnar spacer 5 is formed of an acrylic resin or the like.
- the columnar spacer 5 has a feature that it is less likely to be crushed than plastic beads or the like. However, as shown in FIG.
- the columnar spacer 5 when the substrate la is bonded to the substrate 1b, the columnar spacer 5 has a margin to be compressed with a compression width 40 shown in FIG. 7A.
- the height of the columnar spacer 5 is about a power / zm which differs depending on the type of the reflection type liquid crystal display panel or the transmission type liquid crystal display panel, and the compression width 40 is about lZlO / zm.
- the width in which the columnar spacer 5 is compressed is small.
- the columnar spacer 5 can be compressed to a degree that can absorb the manufacturing error of the columnar spacer 5, and as shown in FIG. 3A or FIG. 3C, the portion where the space between the two substrates becomes narrower is reduced. Occurs.
- the amount of liquid crystal dropped is 96% of the calculated standard liquid crystal value.
- the height is lower than the design value. Even in the case of low !, the case and higher than the design value !, the case of! /, And the deviation, it is possible to prevent the generation of vacuum bubbles and the unevenness of the display surface.
- the second liquid crystal display panel in the present embodiment a region where the number density of the columnar spacers is small and a region where the number density of the columnar spacers are large are formed in the respective necessary regions. Just fine.
- the second liquid crystal display panel in the present embodiment can be manufactured.
- a columnar spacer is formed such that the central force of the display area to be formed is directed to the outer peripheral portion so that the number density gradually decreases.
- the columnar spacer can be formed by a known photolithography method or the like.
- the columnar spacer in the present embodiment is formed in a columnar shape, it is not particularly limited to this shape and may be, for example, a prismatic shape. Further, it is preferable that the number density of the columnar spacers, the material of the columnar spacers, the amount of the liquid crystal to be enclosed, and the like are appropriately changed according to the size and type of the liquid crystal display panel.
- FIGS. 8A and 8B are explanatory views of the liquid crystal display panel in the present embodiment.
- FIG. 8A is a schematic sectional view
- FIG. 8B is a schematic plan view.
- the fact that the two substrates la and lb are fixed by the sealing material 2 and that the liquid crystal is sealed in the space surrounded by the two substrates la and lb and the sealing material 2 indicates that the liquid crystal display according to the first embodiment. Same as panel.
- the liquid crystal display panel in the present embodiment has a low spacer arrangement region 34 as a first region near the inside of the sealing material 2 and a second region further inside the low spacer arrangement region 34. And a high-low spacer arrangement area 33.
- the liquid crystal display panel has a first columnar spacer disposed in the low spacer placement area 34 and the high / low spacer placement area 33, and a second columnar spacer disposed in the high / low spacer placement area 33. Including Pasa.
- a low columnar spacer 30 is formed as a first columnar spacer
- a high columnar spacer 29 is formed as a second columnar spacer.
- the high columnar spacer 29 is formed such that its height at no load is higher than the low columnar spacer 30. In other words, the high columnar spacer 29 is formed to be higher than the low columnar spacer 30 when the pressure from the two substrates is released.
- FIGS. 9A and 9B are diagrams illustrating the arrangement of columnar spacers in the low spacer arrangement area 34 and the high and low spacer arrangement area 33.
- FIG. FIG. 9A is a plan view of the high / low spacer arrangement area 33.
- FIG. A columnar spacer having two types of heights, a high columnar spacer 29 and a low columnar spacer 30, is formed in a wiring region at a boundary between picture elements.
- the high columnar spacer 29 and the low columnar spacer 30 are arranged so as to be mixed.
- FIG. 9B is a plan view of the low spacer arrangement region 34. In the low spacer arrangement region 34, only the low columnar spacer 30 having a low height is formed. Between the two substrates, Liquid crystal is sealed in an amount when two substrates are bonded in parallel to each other, that is, an amount calculated by a standard liquid crystal.
- the liquid crystal display panel in the present embodiment includes the two spacers having different heights when the pressure in the height direction is released.
- the high and low spacer placement area 33 has a height of ⁇ 10 m and a height of 4.5 ⁇ m.
- Columnar spacers 29 are arranged at a ratio of one for every ten picture elements.
- a low columnar spacer 30 having a diameter of 10 m and a height force of 3 m is arranged at a ratio of one to 15 picture elements.
- a low columnar spacer having a diameter of ⁇ 10 / ⁇ and a height of 4.3 m is arranged at a ratio of 30 for each of 15 picture elements. ing.
- the design value of the space between the two substrates is the same as the design value of the height of the low columnar spacer.
- the high column spacers 29 are formed in the high and low spacer arrangement regions 33 at a higher density than the number density of the low columnar spacers 30 in the low spacer arrangement regions 34.
- the main surfaces of the two substrates la and lb are parallel to each other.
- the interval between the two substrates la and lb can be narrowed in preference to the high and low spacer arrangement region 33.
- the high columnar spacer 29 is compressed preferentially over the low columnar spacer 30 and the low columnar spacer 30 is compressed. Compression stops at the height (interval between the design values of the two substrates). As shown in FIG. 8A, the two substrates are parallel to each other.
- the high columnar spacer 29 of the high / low spacer placement area 33 is not sufficiently compressed, and the high / low spacer placement area 33 is not sufficiently compressed.
- the distance between the substrates is larger than the distance between the substrates in the low spacer arrangement region 34.
- the high columnar spacer 29 is compressed to the height of the low columnar spacer 30 and the low spacer arrangement region 34 In this case, when the distance between the substrates la and lb is reduced, the generation of vacuum bubbles can be prevented.
- the size of the space in which the liquid crystal is sealed can be adjusted in both the high and low spacer arrangement regions and the low spacer arrangement region. Therefore, in this embodiment, The liquid crystal display panel to be manufactured has a large margin for canceling a manufacturing error of the columnar spacer. Even if the amount of liquid crystal to be filled is not smaller than the standard liquid crystal calculated value, the displayed product can be displayed even if the height of the formed columnar spacer is higher, lower, higher, lower than the designed value. Position can be prevented from lowering.
- a columnar spacer may be formed on one substrate lb by photolithography or the like, or the sealant 2 may be formed in an annular shape on the other substrate la after the sealant 2 is formed in an annular shape. Dropping the liquid crystal 6 is the same as the manufacturing method in the first embodiment.
- the low spacer arrangement region 34 as the first region is formed near the inside of the sealing material and the low spacer is formed.
- a high / low spacer placement area 33 as a second area is formed further inside the sensor placement area 34.
- the low spacer arrangement region 34 only the low columnar spacer 30 as the first columnar spacer is formed.
- the high / low spacer arrangement region 33 in addition to the low columnar spacer 30, a height higher than the low columnar spacer 30 and a high columnar spacer 29 are formed.
- the sealing material 2 is disposed in a ring shape, and the liquid crystal 6 is disposed inside a region surrounded by the sealing material 2. In the liquid crystal 6, the amount of the standard liquid crystal calculation value is dropped.
- the two substrates are bonded in a vacuum atmosphere. As shown by an arrow 52, after bonding the two substrates in a vacuum, the main surfaces of the substrates la and lb are pressed. In this way, compression is performed so that the main surfaces of the substrates la and lb are close to each other.
- a high columnar spacer 29 is formed in addition to the low columnar spacer 30.
- the high columnar spacer 29 contacts the substrate la before the low columnar spacer 30.
- the tip of the high columnar spacer 29 is compressed first, and the volume of the liquid crystal 6 matches the volume of the space surrounded by the two substrates la and lb. Once done, compression stops spontaneously.
- the compression is stopped during the compression of the high columnar spacer, and the interval between the high and low spacer placement regions 33 is reduced to a low spacer. It is larger than the spacing of the placement area 34.
- the low spacer is used. In the sensor arrangement region 34, the distance between the substrates la and lb is reduced. In this way, the two substrates can be bonded together while preventing the generation of vacuum bubbles according to the manufacturing error of the columnar spacer.
- Embodiments 1 and 2 the height of the columnar spacers and the relative size of the space between the substrates are exaggerated in order to facilitate the component force. . Further, in the present invention, a portion where the main surfaces are not parallel to each other occurs between the two substrates, but a change in the portion is small, which affects display quality. Not a thing. Further, the present invention can be applied to any of a monochrome liquid crystal display panel and a color liquid crystal display panel.
- a substrate with a spacer used for a liquid crystal panel will be described.
- a substrate with a spacer according to the present invention is an inorganic or organic EL device that is not limited to a liquid crystal panel, a plasma panel, and a field emission device. It can also be used for panels, electoric chromic panels, etc.
- the liquid crystal panel can be applied to an image shift panel that sequentially shifts pixels optically only by the liquid crystal display panel and a parallax noria panel that can display a three-dimensional image.
- the image shift panel has at least one combination of a liquid crystal panel that modulates the polarization state of light and a birefringent element that shifts the optical path according to the polarization state of light emitted from the liquid crystal panel.
- the parallax scanner panel can display a stereoscopic image by combining with a video display element having left-eye pixels and right-eye pixels.
- Embodiment 3 based on the present invention will be described with reference to FIG. 13 to FIG.
- FIG. 13 is a cross-sectional view schematically showing a liquid crystal panel using the substrate with spacer according to the third embodiment.
- the liquid crystal panel includes a pair of substrates 101 and 102, a peripheral sealing material 103 sandwiched between the two substrates 101 and 102, a liquid crystal layer 104 sandwiched between the substrates 101 and 102 and surrounded by the peripheral sealing material 103, And a spacer 105 for making the cell gap of the liquid crystal layer 104 uniform.
- One substrate 101 is a color filter substrate.
- the substrate 101 is a color filter layer (not shown), a transparent electrode (not shown) such as ITO (indium tin oxide), and a polyimide or the like.
- Liquid crystal alignment film (not shown).
- the other substrate 102 is a TFT (Thin Film Transistor) substrate, and includes a plurality of gate bus lines (not shown) each extending in the row direction and a plurality of source bus lines (not shown) extending crossing the gate bus lines. , A TFT (not shown) provided near the intersection of the gate bus line and the source bus line, and a pixel transparent electrode (not shown) connected to the source bus line (not shown) via the TFT and arranged in a matrix. ) And a liquid crystal alignment film (not shown) covering the pixel transparent electrode.
- TFT Thin Film Transistor
- Examples of the material of the substrates 101 and 102 include glass such as quartz glass, soda lime glass, borosilicate glass, low alkali glass, and non-alkali glass, plastic such as polyester and polyimide, and semiconductor such as silicon. .
- FIG. 14 is an enlarged sectional view schematically showing the spacer 105 of the present embodiment
- FIG. 15 is a plan view of the spacer 105.
- a force that describes the case where the spacer 105 is formed on the color filter substrate 101 is described.
- the spacer 105 may be formed on the TFT substrate 102.
- the spacer 105 has a first spacer portion 105a and a second spacer portion 105b formed above the first spacer portion 105a.
- the first spacer portion 105a and the second spacer portion 105b each have a frustum shape, and the diameter A of the upper portion of the first spacer portion 105a is equal to that of the second spacer portion 105b. Longer than bottom diameter B.
- the spacer 105 has a first spacer portion 105a having a relatively large upper base area (upper surface area) and a second spacer portion 105a having a relatively small upper base area.
- the shape is combined with spacer part 105b.
- FIG. 16 is a graph showing a load-displacement characteristic of the spacer 105 of the present embodiment. As shown in FIG. 16, the load-displacement characteristic graph shows a non-linear shape with a steep slope until the height exceeds the height h2 of the second spacer portion 105b. If the load is continued beyond the height h2, the load-displacement characteristics will change drastically, and a non-linear shape with a gentle slope will be drawn.
- the displacement becomes difficult.
- the second spacer portion 105b to follow the load caused by the error in the liquid crystal drop amount and the temperature change by elastic deformation of the second spacer portion 105b.
- the panel is relatively hard to be deformed by the stress of the first spacer portion 105a under a local strong pressure.
- FIG. 17 is a cross-sectional view schematically showing a spacer 150 of a comparative example.
- the spacer 150 has a shape of one frustum as shown in FIG.
- the diameter C of the upper portion of the spacer 150 is restricted by the accuracy of the exposure apparatus.
- the diameter C at the top of the spacer 150 is about 6 to 10 ⁇ m, and the diameter at the bottom of the spacer 150 is 1 ⁇ m. It is about SXC / zm.
- the aspect ratio of the spacer 150 is about HZ1.5 X C.
- FIG. 18 is a cross-sectional view illustrating the size of spacer 105 according to the present embodiment.
- the spacer 105 of the present embodiment has a structure in which a first spacer portion 105a and a second spacer portion 105b each having a frustum shape are vertically combined, and the first spacer is formed. Since the diameter A at the top of the portion 105a is longer than the diameter B at the bottom of the second spacer portion 105b, the diameter D at the bottom of the spacer 105 can be made longer than that of the spacer 150 of the comparative example. it can.
- the bottom diameter D of the spacer 105 can be 1.8 XC or more. Therefore, the aspect ratio of the spacer 105 is less than HZl. 8 XC, that is, the aspect ratio is larger than that of the spacer 150 of the comparative example. Since the static ratio can be reduced, even when a small-sized spacer is produced, it is possible to prevent damage during the rubbing process.
- the typical size of the spacer 105 will be described. Since it is advantageous in terms of cost to use a proximity type exposure apparatus, a case where a proximity type exposure apparatus is used will be described. Since the accuracy of the proximity type exposure apparatus is limited to about 6 m, the diameter C of the upper part of the second spacer portion 105b is at least about 6 / zm. On the other hand, the diameter D of the bottom of the spacer 105 (in this embodiment, the bottom of the first spacer 105a) is set to be at least 1.8 times the diameter C of the upper part of the second spacer 105b. .
- the diameter D of the bottom of the spacer 105 is set to about 14 m so that no force is applied to the pixel opening.
- the spacer density in the cell is preferably about 1000 / cm 2 .
- the height H of the spacer 105 is substantially equal to the cell gap of the liquid crystal layer 104. Specifically, it is about 5 ⁇ m for the transmissive display type, and about 2.5 ⁇ m for the reflective display type. However, since the spacer 105 is slightly crushed when the substrates 101 and 102 are overlapped, the value obtained by adding the expected amount (about 0.2 m) to the cell gap is the height H of the spacer 105. And For example, it is about 5.2 m for the transmissive display type and about 2.7 ⁇ m for the reflective display type.
- the second spacer portion 105b elastically deforms following an error in the amount of liquid crystal dropped or a load due to a temperature change.
- the height h2 of the second spacer portion 105b is set so that the spacer 105 does not collapse beyond a predetermined thickness even under a strong local pressure. Also, the height h2 is set in consideration of variations in the amount of liquid crystal dropped, the height of the spacer 105, and in-plane displacement of the cell gap due to expansion of the liquid crystal material.
- the height h2 of the second spacer portion 105b is preferably 0.
- the spacer 105 of the present embodiment has a spacer 105 at a height of 0.85 XH from the bottom of the spacer 105, where H is the height from the bottom to the top of the spacer 105. Is less than or equal to 1.05 times the diameter C at the top of spacer 105, ie, less than or equal to 1.05 XC.
- a process of manufacturing a liquid crystal display panel using the substrate with a spacer of the present embodiment will be described. First, a color filter layer and a transparent electrode are sequentially formed on one substrate 101 by a sputtering method and a printing method.
- a spacer 105 is formed at a light shielding position between pixels by photolithography.
- a gradation photomask having a light-shielding portion in which a part of transmittance changes continuously or stepwise is used (see, for example, JP-A-2002-229040).
- development is performed, whereby spacers 105 having different heights (in other words, having a step) can be formed.
- polyimide is coated on the substrate 101 as an alignment film material, and a rubbing process is performed to form an alignment film.
- a rubbed alignment film covering the pixel transparent electrode is formed on the other substrate 102.
- a UV-curable peripheral sealing material 103 containing an epoxy resin is formed on one of the substrates 101 and 102 by a screen printing method or a dispenser method.
- the pattern of the peripheral seal material 103 does not have an opening serving as a liquid crystal injection port and has a closed loop shape.
- a nematic liquid crystal material is dropped into the pattern frame of the peripheral seal material 103, the substrates 101 and 102 are overlapped in a vacuum chamber, and a liquid crystal layer 104 is formed in a gap between the substrates 101 and 102.
- the gap between the two substrates 101 and 102 in other words, the thickness (cell gap) of the liquid crystal layer 104 is determined by the amount of the liquid crystal material to be dropped and the height of the peripheral sealing material 103.
- the liquid crystal material and the peripheral seal material 103 tend to cause in-plane unevenness of the cell gap.
- the panel since there is no member for defining the cell gap other than the periphery of the panel, the panel is greatly affected by the external pressure, and display unevenness occurs.
- the spacers 105 that define the cell gap are arranged so as to be substantially uniform in the display area on the substrate 101, the panel is hardly affected by external pressure, and thus display unevenness is caused. Is unlikely to occur.
- the second spacer portion 105b on the first spacer portion 105a absorbs an error in the amount of liquid crystal dropped or a load due to a temperature change. Display unevenness due to unevenness can be reduced. Further, the upper part of the first spacer portion 105a is Since the diameter A is longer than the diameter B at the bottom of the second spacer portion 105b, the local strength and pressure generated when the substrates are bonded to each other are reduced by the stress of the first spacer portion 105a. The panel is hardly deformed, and the display quality is maintained.
- a part of the sealing material (also referred to as a dummy sealing material) at a portion different from the peripheral sealing material 103 is temporarily cured by UV light.
- the panel inner force is also taken out, and the peripheral seal material 103 is irradiated with UV light to harden the peripheral seal material 103.
- the liquid crystal panel shown in FIG. 13 is manufactured.
- a TFT is used as a liquid crystal driving element.
- CMOS Metal Insulator Metal
- CMOS Metal Insulator Metal
- passive (multiplex) driving may be used without using driving elements.
- a liquid crystal panel When a liquid crystal panel is used as a display panel, it can be applied to any of a transmission type, a reflection type, and a transmission / reflection type display panel.
- liquid crystal panel is manufactured by the liquid crystal drop bonding method.
- a liquid crystal panel can be manufactured by another method using the substrate with spacer of the present invention.
- FIG. 19 is a cross-sectional view schematically showing a substrate with a spacer according to the fourth embodiment
- FIG. 20 is a plan view thereof.
- the spacer 105 shown in the present embodiment is the same as the spacer 105 of the third embodiment except that the upper portion of the first spacer portion 105a has a groove 105c. Accordingly, the shape, size, and manufacturing method of the spacer 105 described in the present embodiment will be replaced with the description in Embodiment 3.
- the groove 105c formed near the bottom of the second spacer portion 105b surrounds the second spacer portion 105b in plan view.
- the groove 105c has a continuous ring shape, but may have a discontinuous ring shape.
- the cross-sectional shape of the groove 105c is not limited to the V-shape shown in FIG. 19, and may be, for example, a U-shape.
- the width F of the groove 105c is not particularly limited, but is preferably 0.2 m or more and 2 m or less.
- the depth G of the groove 105c is not particularly limited, but is preferably 0.2 ⁇ m or more and 1 ⁇ m or less.
- the first spacer portion 105a and the second spacer portion 105b are both frustum-shaped.
- the first spacer portion 105a and the second spacer portion The shape of the portion 105b is not limited to this.
- 21A and 21B are a plan view (upper view) and a cross-sectional view (lower view) schematically showing the spacers of Embodiments 5 and 6, respectively.
- the first spacer portion 105a and the second spacer portion 105b are both cylindrical, and the second spacer portion 105b is located above the first spacer portion 105a. It may be formed substantially at the center. Further, as shown in FIG. 21B, the second spacer portion 105b may be formed on the upper peripheral edge of the first spacer portion 105a.
- the spacer 105 shown in each of FIGS. 21A and 21B can also expect the same effect as the spacer 105 shown in the third and fourth embodiments.
- the first spacer portion 105a and the second spacer portion 105b have a frustum shape in the third and fourth embodiments, and have a columnar shape in the fifth embodiment.
- the top and bottom surfaces are circular in Embodiment 3-5.
- the shape of each surface at the top and bottom of the spacer portions 105a and 105b is not particularly limited, and may be, for example, a polygon or an ellipse.
- the upper surface of each of spacer portions 105a and 105b may not be parallel to the substrate surface and may be inclined with respect to the substrate surface. If the top and bottom of the spacers 105a and 105b are not circular using a plane parallel to the substrate surface, if the straight line crosses the cut plane, The longest one is called the “diameter”.
- the force spacer described in the case where the spacer 105 is composed of the two spacer portions 105a and 105b is a multi-stage having a further spacer portion. Is also good.
- the present invention can be advantageously applied to a liquid crystal display panel and a method for manufacturing a liquid crystal display panel.
- the substrate with a spacer of the present invention can be used for a liquid crystal panel, an inorganic or organic EL panel, a plasma panel, a field emission panel, an electoric chromic panel, and the like.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2005514747A JP4413191B2 (ja) | 2003-10-16 | 2004-10-08 | スペーサ付き基板、パネル、液晶表示パネル、パネルの製造方法および液晶表示パネルの製造方法 |
US10/574,617 US7859635B2 (en) | 2003-10-16 | 2004-10-08 | Liquid crystal display panel and manufacturing method thereof |
EP04792196A EP1681592B1 (en) | 2003-10-16 | 2004-10-08 | Liquid crystal panel and method for producing liquid crystal panel |
DE602004022576T DE602004022576D1 (de) | 2003-10-16 | 2004-10-08 | Flüssigkristallanzeige und verfahren zur herstellung einer flüssigkristallanzeige |
Applications Claiming Priority (4)
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JP2003-355955 | 2003-10-16 | ||
JP2003355955 | 2003-10-16 | ||
JP2003-431013 | 2003-12-25 | ||
JP2003431013 | 2003-12-25 |
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WO2005038518A1 true WO2005038518A1 (ja) | 2005-04-28 |
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PCT/JP2004/014927 WO2005038518A1 (ja) | 2003-10-16 | 2004-10-08 | スペーサ付き基板、パネル、液晶表示パネル、パネルの製造方法および液晶表示パネルの製造方法 |
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US (1) | US7859635B2 (ja) |
EP (2) | EP1681592B1 (ja) |
JP (1) | JP4413191B2 (ja) |
KR (1) | KR100796109B1 (ja) |
DE (2) | DE602004029520D1 (ja) |
TW (1) | TW200534011A (ja) |
WO (1) | WO2005038518A1 (ja) |
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Also Published As
Publication number | Publication date |
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TWI305861B (ja) | 2009-02-01 |
US20070121051A1 (en) | 2007-05-31 |
JPWO2005038518A1 (ja) | 2007-11-22 |
EP2031438B1 (en) | 2010-10-06 |
EP2031438A2 (en) | 2009-03-04 |
EP1681592A4 (en) | 2008-04-16 |
EP2031438A3 (en) | 2009-06-03 |
TW200534011A (en) | 2005-10-16 |
KR100796109B1 (ko) | 2008-01-21 |
DE602004029520D1 (de) | 2010-11-18 |
JP4413191B2 (ja) | 2010-02-10 |
EP1681592B1 (en) | 2009-08-12 |
US7859635B2 (en) | 2010-12-28 |
EP1681592A1 (en) | 2006-07-19 |
KR20060096034A (ko) | 2006-09-05 |
DE602004022576D1 (de) | 2009-09-24 |
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