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WO2013166813A1 - 弯曲液晶显示屏及其制造方法和设备 - Google Patents

弯曲液晶显示屏及其制造方法和设备 Download PDF

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Publication number
WO2013166813A1
WO2013166813A1 PCT/CN2012/083714 CN2012083714W WO2013166813A1 WO 2013166813 A1 WO2013166813 A1 WO 2013166813A1 CN 2012083714 W CN2012083714 W CN 2012083714W WO 2013166813 A1 WO2013166813 A1 WO 2013166813A1
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WO
WIPO (PCT)
Prior art keywords
curved
substrate
liquid crystal
color filter
crystal display
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/CN2012/083714
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English (en)
French (fr)
Inventor
赵德江
张玉军
刘超
孙中元
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.)
BOE Technology Group Co Ltd
Original Assignee
BOE Technology Group Co Ltd
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 BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US13/877,504 priority Critical patent/US9256105B2/en
Publication of WO2013166813A1 publication Critical patent/WO2013166813A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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

Definitions

  • Embodiments of the present invention relate to a curved liquid crystal display and a method and apparatus for fabricating the same. Background technique
  • the liquid crystal display has gradually become one of the mainstream display devices with the advantages of lightness and thinness. At present, most liquid crystal displays are flat due to the use of glass substrate materials. However, for some special applications, such as the installation of advertising displays on curved walls, curved displays are often required. Due to the limited performance of the glass substrate material, it is difficult to manufacture a curved liquid crystal display.
  • a resin-based material capable of achieving bending is used as a substrate, and a film is attached to a surface of a glass substrate, and the glass substrate is bent by the force of the film.
  • the bending property of the substrate is not rigid and the stability is poor, and the curvature of the display also changes as the use time increases.
  • Embodiments of the present invention provide a curved liquid crystal display and a method and apparatus for fabricating the same, for manufacturing a liquid crystal display having a certain degree of curvature and stable bending performance.
  • An aspect of the invention provides a method for manufacturing a curved liquid crystal display, comprising: fabricating an array substrate by using a flat glass substrate having a first thermal expansion coefficient, and fabricating a color filter substrate by using a flat glass substrate having a second thermal expansion coefficient, a thermal expansion coefficient different from the second thermal expansion coefficient; coating a sealant at a surface edge of the array substrate and/or the color filter substrate; heating the array substrate and the color filter substrate, determining the array substrate and When the color filter substrates are thermally expanded and both reach the same preset length and width, the expanded array substrate and the color filter substrate are bonded together by the sealant to form a bonded substrate; and the bonded substrate is cooled. Forming a curved bonded substrate having a curvature.
  • Another aspect of the present invention provides a curved liquid crystal display comprising: utilizing different thermal expansion An array substrate and a color filter substrate having the same curvature and a liquid crystal sandwiched between the array substrate and the color filter substrate, which are made of a flat glass substrate having a coefficient of expansion.
  • Another aspect of the invention provides a seeding apparatus for seeding a curved liquid crystal display, comprising: one or more curved liquid crystal cells having a set curvature.
  • Another aspect of the present invention provides a leveling sealing apparatus for flattening a curved liquid crystal display, comprising: one or more pairs of curved pressing plates, the curved pressing plate having the bending The same curvature of the LCD screen.
  • Another aspect of the present invention provides a backlight for providing backlighting for a curved liquid crystal display, comprising: a curved light guide plate having the same curvature as the curved liquid crystal display.
  • Embodiments of the present invention utilize a feature in which two flat glass substrates having different coefficients of thermal expansion are cooled and contracted to produce different stresses to obtain a liquid crystal display having a certain degree of curvature. Since the embodiment of the present invention performs bonding when both the planar array substrate and the color filter substrate are expanded to the same length and width, the manufacturing process is basically the same as that of the existing liquid crystal display, and thus the existing production can be performed. In the case of large-scale modification of the device ⁇ 1, the curved liquid crystal display panel is mass-produced, and since the array substrate and the color filter substrate are rigidly bent, the manufactured curved liquid crystal display has good stability and does not occur with the change of the use time. The degree of curvature changes. DRAWINGS
  • FIG. 1 is a schematic structural view of a conventional wafer filling apparatus for manufacturing a flat liquid crystal display panel
  • FIG. 2 is a schematic structural view of a conventional leveling sealing apparatus used for manufacturing a flat liquid crystal display panel
  • FIG. 3(a) is an embodiment of the present invention.
  • FIG. 3(b) is a schematic structural view of a curved liquid crystal display screen according to an embodiment of the present invention
  • FIG. 4(a) is another schematic diagram of an embodiment of the present invention. Schematic diagram of two glass substrates in a pair-to-box process;
  • FIG. 4(b) is a schematic structural view of another curved liquid crystal display device according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a crystal filling device according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a leveling sealing device according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a backlight according to an embodiment of the present invention. detailed description
  • a curved liquid crystal display panel and a manufacturing method and apparatus thereof according to embodiments of the present invention are further described in detail below with reference to the accompanying drawings.
  • One embodiment of the present invention provides a method of manufacturing a curved liquid crystal display, the method comprising the following steps.
  • Step 101 fabricating an array substrate by using a flat glass substrate having a first thermal expansion coefficient, and forming a color filter substrate by using a flat glass substrate having a second thermal expansion coefficient, wherein the first thermal expansion coefficient is different from the second thermal expansion coefficient;
  • Step 102 applying a sealant at a surface edge of the array substrate and/or the color filter substrate;
  • Step 103 heating the array substrate and the color filter substrate to determine thermal expansion of both the array substrate and the color filter substrate And when the same preset length and width are reached, the expanded array substrate and the color filter substrate are bonded together by the sealant to form a bonded substrate;
  • Step 104 cooling the bonded substrate to form a curved bonded substrate having a curvature.
  • the method of the present embodiment utilizes the characteristics that different stresses are generated when two flat glass substrates having different thermal expansion coefficients are cooled and contracted.
  • the method fabricates an array substrate and a color filter substrate by using two planar glass substrates having different thermal expansion coefficients, and then, by heating the array substrate and the color filter substrate having the different thermal expansion coefficients, both substrates are expanded to a pre-expansion When the length and the width are set, the two are bonded to form a liquid crystal cell, and finally the liquid crystal cell formed of the two substrates is cooled, thereby obtaining a liquid crystal display having a certain degree of curvature.
  • the manufacturing process is basically the same as that of the existing liquid crystal display, so that the existing production equipment can be omitted.
  • the coefficient of thermal expansion refers to a regularity coefficient of an object whose geometrical characteristics change with temperature due to the effect of thermal expansion and contraction.
  • the coefficient of thermal expansion of the object is positive, which means that the temperature rises and the volume expands.
  • the coefficient of thermal expansion which may be referred to as a coefficient of linear expansion, specifically refers to the ratio of the increase in length or width to the original length or width under a change in unit temperature.
  • the array substrate and the color filter substrate fabricated by using the glass substrate having different expansion coefficients mentioned in the embodiments of the present invention reach a predetermined length and width under heating conditions, which means that the lengths of the array substrate and the color filter substrate are the same.
  • the preset length, and the width reaches the same preset width.
  • the coefficient of thermal expansion of the array substrate in the present disclosure refers to the coefficient of thermal expansion of the planar glass substrate used in the fabrication of the array substrate; the coefficient of thermal expansion of the color filter substrate referred to in the present disclosure means that the The coefficient of thermal expansion of the flat glass substrate used in the color film substrate.
  • the degree of curvature may be preset, and the initial length and the initial width of the array substrate and the color filter substrate are respectively determined according to the bending degree. .
  • the curvature of the curved display is determined by the length and width of the final two substrates. For example, when the length and width of the final color filter substrate are respectively greater than the length and width of the array substrate, after the liquid crystal cell is formed and cooled, the color filter substrate will be concave toward the array substrate, and the difference between the length value and the width value of the two substrates is larger.
  • the array substrate and the color filter substrate fabricated using the glass substrate have a length and width dimension that is not much different from the length and width dimensions before heating after undergoing a process of thermal expansion and contraction.
  • the required degree of curvature can be pre-designed before the curved liquid crystal display is manufactured, and the initial length and initial width of the array substrate and the color filter substrate are respectively determined according to the degree of curvature.
  • the length and width dimensions of the finally obtained color filter substrate and array substrate are not much different from the original long and wide dimensions, a display screen satisfying the curvature can be obtained.
  • the method for manufacturing a curved liquid crystal display provided by the embodiment of the present invention limits only the above steps, but this does not mean that only the above steps are required in the method of the present invention. In other examples, it may also include various other necessary steps to achieve the manufacture of a liquid crystal display, such as making an alignment layer, a spray spacer, and the like.
  • the manufacturing method of the curved liquid crystal display provided by the embodiment of the present invention has no limitation except for the above steps, that is, it is not limited to the specific steps. Method to realize.
  • the sealant is a heat-curable frame sealant.
  • the main component of the commonly used frame sealant is resin, which is divided into two basic types: heat-curable frame sealant and photocurable frame sealant.
  • the heat-curable frame sealant is cured by heating, and its adhesive strength is high.
  • the photocurable frame sealant is cured by light, and its adhesive strength is low.
  • the heat-curable frame sealant coated in the present invention can be cured by the heating process.
  • the heating temperature is 80 degrees Celsius to 300 degrees Celsius.
  • the heating temperature is between 80 degrees Celsius and 300 degrees Celsius. Otherwise, if the temperature is too high, the performance of each functional unit in the array substrate and the color filter substrate will be destroyed, and if the temperature is too low, the sealant will not be cured.
  • the thermal expansion coefficient, the initial length, and the initial width of the array substrate and the color filter substrate determining a specific value of a required heating temperature when the two substrates reach the same preset length and width (the Specific values should be between 80 degrees Celsius and 300 degrees Celsius).
  • the degree of volume expansion of the array substrate and the color filter substrate having a certain coefficient of thermal expansion is directly related to the temperature at which they are heated.
  • the heating temperature is strictly controlled so that the two glass substrates can reach the same preset length after the thermal expansion, respectively, from the respective initial lengths and widths. And width.
  • the array substrate and the color filter substrate may be heated at different temperatures, or may be heated at the same temperature.
  • the embodiment of the present invention is not limited to the heating of the two substrates at the same temperature as long as the expansion purpose to be achieved by the present invention can be achieved.
  • the expanded array substrate is formed by using the frame sealant
  • the film substrate is bonded together to form a bonded substrate to obtain a liquid crystal cell.
  • aligning the alignment mark on the expanded array substrate with the alignment mark on the expanded color filter substrate; bonding the expanded array substrate and the color filter substrate with the sealant Together, a bonded substrate is formed.
  • the position of the alignment mark on the array substrate and the color film substrate may be fully changed due to the volume change during the thermal expansion process, in order to finally obtain a curved liquid crystal display with good display effect.
  • the alignment marks on the two substrates should be aligned to smoothly complete the process of the box (ie, The sealant glues the two substrates together).
  • the position of the alignment mark on each substrate changes, and according to the change of the position of the alignment mark, the initial positions of the alignment marks on the two substrates are respectively determined, so as to achieve the same
  • the alignment marks on the two substrates can be aligned; or, the simulation process can be used to simulate the change of the position of the alignment mark when the two substrates are thermally expanded by using simulation software before manufacturing the curved liquid crystal display. And determining an initial position of the alignment mark on the two substrates according to the simulation process, so as to achieve When the prese
  • the pixel electrode on the expanded array substrate and the expanded The color filters on the color filter substrate are aligned.
  • the smallest display unit in the display device is a pixel, corresponding to each pixel, there is a pixel electrode on the array substrate, and a color filter is arranged on the color film substrate, and the pixel electrode and the color filter of each pixel should work together to realize The effect of color changes.
  • the color of the pixel electrode and the color filter substrate on the array substrate caused by the volume change during the thermal expansion of the array substrate and the color filter substrate should be fully considered. The position of the filter is changed.
  • the array substrate when the two substrates are all expanded to the same preset length and width, the array substrate should be ensured.
  • the pixel electrode is aligned with the color filter on the color filter substrate, so that after the liquid crystal is poured, Step to get a curved LCD screen with normal display function.
  • the volume thereof changes, and the position of each pixel on the substrate also changes, so that both substrates reach the same preset length.
  • the width, the pixel electrode corresponding to the same pixel and the color filter can be aligned, and when the array substrate and the color filter substrate are manufactured, the two substrates are respectively calculated according to the thermal expansion coefficient of the used glass substrate
  • the initial length and the width are expanded to the preset length and width, corresponding to the change of the position of the pixel electrode and the color filter of each pixel, and determining the pixel electrode on the array substrate according to the change of the position
  • the initial position of the color filter and the initial position of the color filter on the color filter substrate, so that the pixel electrode and the color filter corresponding to the same pixel can be aligned when the same preset length and width are reached; or, simulation can be utilized
  • the software respectively simulates the pixel of each pixel when the array substrate and the color filter substrate are thermally expanded.
  • the cooling is natural cooling.
  • the method of the embodiment of the present invention uses natural cooling.
  • the method of the embodiments of the present invention further includes: injecting liquid crystal in the curved bonded substrate.
  • liquid crystal is poured into the curved bonded substrate.
  • a liquid crystal is poured into the curved bonded substrate by a seeding apparatus having a curved liquid crystal cell, wherein the curved liquid crystal cell has a groove wall defining a degree of curvature.
  • the filling apparatus includes: a crystallizing tank 201, a liquid crystal tank 202, an air suction hole 203, an air pump 204, a gas release hole 205, an air suction pipe 206, and the like.
  • the liquid crystal cell 202 containing the liquid crystal is of a rectangular parallelepiped type. Since the liquid crystal is expensive, the liquid crystal cell 202 is generally small in size and is used only for a liquid crystal which is slightly larger than the liquid crystal amount required for the liquid crystal display.
  • the flat display screen to be crystallized is placed in the crystal tank 201, and then the filling port on the flat display screen is immersed in the liquid crystal tank 202 filled with the liquid crystal, and finally the vent hole 205 is opened to make the crystal box In 201, an appropriate amount of atmosphere is entered, and the liquid crystal in the liquid crystal cell 202 is passed through the filling port into the flat display screen by atmospheric pressure and capillary phenomenon.
  • the crystallization apparatus shown in Fig. 1 is used for crystallization. Since the liquid crystal cell 202 is of a rectangular parallelepiped type, the crystallization process may not be completed smoothly, and the JU ⁇ may cause waste of the liquid crystal. Therefore, in the method of the embodiment of the present invention, it is necessary to complete the crystallization process in the process of manufacturing the curved liquid crystal display by using a crystallization apparatus having a curved liquid crystal cell.
  • the groove wall of the curved liquid crystal cell should have a certain degree of curvature, which is determined to be capable of crystallizing the curved bonded substrate, and may be slightly larger or slightly smaller than the curvature of the curved bonded substrate.
  • the set bending degree is the same as the bending degree of the curved bonded substrate.
  • the curvature of the groove wall should be made just equal to the curvature of the curved bonded substrate, that is, the curved bonded substrate is placed.
  • the groove wall is microscopically parallel to the curved bonded substrate.
  • the method of the embodiment of the present invention further includes: flattening the curved bonded substrate after the liquid crystal is poured.
  • the curved bonded substrate after the liquid crystal is poured is level-sealed.
  • the liquid-implanted curved bonded substrate is flattened by a flattening sealing device having a curved pressing plate, wherein the curved extruded plate has the same degree of curvature as the curved bonded substrate.
  • FIG. 2 is a schematic structural view of a conventional leveling sealing device, which includes: a frame 301, a fixing plate 302, a movable plate 303, a pressurized cylinder 304, a piston rod 305, and a sealing glue coating port ( Not shown in Fig. 2), a UV curing lamp (not shown in Fig. 2), and the like.
  • the non-parallelism of the two substrates in the planar liquid crystal display substrate is forcibly corrected by the mechanical method of rigid body pressing, so that the thickness of the liquid crystal sandwiched between the array substrate and the color film substrate is uniform, and the leveling is performed.
  • the fixing plate 302 and the movable plate 303 are both flat plate type structures.
  • the process of flattening the flat liquid crystal display by using the leveling sealing device shown in FIG. 2 includes: firstly using the fixing plate 302 against a substrate in the flat liquid crystal display, and then using the piston of the pressurized cylinder 304.
  • the rod 305 drives the movable plate 303 to approach another substrate in the flat liquid crystal display, and adds it
  • the sealing glue coating port is used to apply the sealing glue to the filling port of the flat liquid crystal display, and then the piston rod 305 of the pressing cylinder 304 is driven.
  • the movable plate 303 leaves the other substrate in the flat liquid crystal display, and the coated sealing glue is pressed into the filling port by atmospheric pressure; finally, the coated sealing glue is irradiated with a UV curing lamp to cure it.
  • the fixing plate 302 and the movable plate are used.
  • 303 is a flat plate type structure, and both substrates of the curved bonded substrate are curved, so that the flat sealing process for the curved bonded substrate cannot be completed, and it is highly likely that the two substrates of the curved bonded substrate are damaged.
  • a plate-shaped structure having a certain degree of curvature (hereinafter referred to as a curved extrusion plate) to flatten the curved bonded substrate after perfusion of the liquid crystal, and, in order to make the bending
  • the thickness of the liquid crystal sandwiched between the array substrate and the color filter substrate in the bonded substrate is uniform, so that the curved extruded plate has the same curvature as the curved bonded substrate.
  • the curved pressing plate should be symmetrically disposed, for example, may have a certain bending in pairs.
  • a fixed plate hereinafter referred to as a curved fixed plate
  • a movable plate having a certain degree of curvature hereinafter referred to as a curved movable plate).
  • the method of an embodiment of the present invention further includes: combining the flattened and sealed curved bonded substrate with a backlight.
  • the flattened and sealed curved bonded substrate is combined with a backlight.
  • the bonded substrate and the backlight having the curved light guide plate are fixed together.
  • the curved liquid crystal display manufactured by the embodiment of the present invention has a certain degree of curvature, and if the backlight is provided by the existing backlight for the flat liquid crystal display, the existing backlight for the flat liquid crystal display is used.
  • the light guide plate is a flat plate type structure, which causes unevenness of the backlight line of the curved liquid crystal display and affects the picture quality. Therefore, in the method of the embodiment of the present invention, a backlight having a curved light guide plate needs to be provided with a backlight, and the curved light guide plate has the same curvature as the curved liquid crystal display.
  • the initial length and initial width of the array substrate and the color filter substrate should be different, respectively. Since the array substrate and the color filter substrate undergo a process of thermal expansion and contraction, the length and width thereof are not much different from the length and width before heating (ie, the initial length and width), and the curvature of the finally obtained curved display screen is specifically Determined by the length and width of the final array substrate and color film substrate. Then, the curvature of the finally obtained curved display screen can be determined by the initial length and width of the two substrates.
  • the initial length and initiality of the two substrates should be made.
  • the widths are different; in addition, since the thermal expansion coefficients of the array substrate and the color filter substrate are different, in order to enable the two substrates to expand to the same preset length and width, the two substrates should have different initial lengths and width.
  • the glass substrates used for manufacturing the array substrate and the color filter substrate are all flat glass substrates, that is, the present invention can be used, for example, in the conventional display screen manufacturing process.
  • the flat glass substrate material can realize large-volume curved display manufacturing and save manufacturing cost by implementing small process improvement on the basis of existing raw materials and existing processes.
  • the embodiment of the present invention further provides a curved liquid crystal display, comprising: an array substrate and a color film substrate having the same curvature prepared by using a flat glass substrate with different thermal expansion coefficients, and sandwiching the array substrate and the color film
  • the liquid crystal between the substrates is manufactured by the above-described method for manufacturing a curved liquid crystal display.
  • the above-mentioned curved liquid crystal display manufacturing method can be used to manufacture a convex curved display or a concave curved display according to actual needs.
  • the thermal expansion coefficient of the color filter substrate is greater than the thermal expansion coefficient of the array substrate, as shown in FIG. 3( a )
  • the two substrates are heated to expand to the same preset length and width, the two substrates are aligned, and the sealing is used.
  • the sealant bonds the two to form a liquid crystal cell; as shown in Fig. 3(b), during the cooling process, the shrinkage of the color filter substrate is large, the shrinkage of the array substrate is small, and the formation is naturally formed by the stress.
  • the color filter substrate protrudes toward the curved display screen of the array substrate.
  • the thermal expansion coefficient of the color filter substrate is smaller than the thermal expansion coefficient of the array substrate, as shown in FIG. 4( a ), when the two substrates are heated to expand to the same preset length and width, the two substrates are aligned. As shown in FIG. 4(b), during the cooling process, the shrinkage of the color filter substrate is small, the array substrate shrinks greatly, and the color film substrate is naturally formed by the stress to the array. A curved display of the substrate.
  • FIG. 5 Another embodiment of the present invention also provides a crystal filling apparatus for filling a curved display screen
  • the crystal as shown in FIG. 5, includes: a crystal chamber 601, a curved liquid crystal cell 602, a gas vent 603, an air pump 604, a gas vent 605, and an air suction pipe 606, wherein the air vent 603 and the vent hole 605 are located in the crystal
  • the curved surface of the box body 601 has a certain degree of curvature and is placed in the crystal tank 601.
  • the air pump 604 is connected to the crystal tank 601 through the air suction duct 606 and the air suction hole 603.
  • the seeding apparatus can have one or more curved liquid crystal cells 602, each curved liquid crystal cell 602 having a certain degree of curvature and a certain volume.
  • the different curved liquid crystal cells 602 can have the same curvature and different volumes, or have different degrees of curvature and different volumes, or have different degrees of curvature and the same volume.
  • the curved liquid crystal cell 602 having a suitable curvature and volume can be selected according to the specific curvature of the curved display substrate and the required liquid crystal capacity.
  • Step A1 selecting a suitable curved liquid crystal cell 602 according to the curvature of the curved display screen and the required liquid crystal capacity, and placing it in the crystal filling box 601;
  • step A2 the pumping tank 601 is evacuated by the air pump 604;
  • Step A3 inserting the curved display screen to be crystallized into the crystallizing box body 601, and immersing the crystal filling port on the curved display screen into the curved liquid crystal cell 602 filled with the liquid crystal;
  • step A4 the venting opening 605 is opened to allow an appropriate amount of atmosphere to enter the crystallizing tank body 601, and the liquid crystal in the curved liquid crystal cell 602 is passed through the filling port into the curved display screen by atmospheric pressure and capillary phenomenon.
  • the present invention further provides a leveling sealing device, as shown in FIG. 6, comprising: a frame 701, a bending fixing plate 702, a bending movable plate 703, a pressing cylinder 704, a piston rod 705, and a sealing glue coating port. (not shown in FIG. 6), a UV curing lamp (not shown in FIG. 6), wherein the bending fixing plate 702 is fixed to the base of the frame 701, and the pressing cylinder 704 is fixed to the top of the frame 701, and is pressurized.
  • a bending movable plate 703 is fixed to the end of the piston rod 705 of the cylinder 704, and the bending movable plate 703 is disposed opposite to the curved fixing plate 702.
  • the sealing glue coating port and the UV curing lamp are mounted on the frame 701.
  • the flat fixing plate 702 and the curved movable plate 703 are disposed in pairs and have the same curvature and width.
  • the flat sealing device may have a plurality of pairs of curved fixing plates 702 and curved movable plates 703.
  • the curvature of the different pairs of curved fixing plates 702 and curved movable plates 703 may be the same or different, and the size of the webs may be the same or different.
  • the process of flattening the curved liquid crystal display by the flat sealing device includes, for example, the following steps.
  • Step B1 selecting a suitable curved fixing plate 702 and a bending movable plate 703 according to the curvature and the size of the curved liquid crystal display, and vertically fixing the selected bending fixing plate 702 to the frame 701, which will be selected.
  • the curved movable plate 703 is fixed to the end of the piston rod 705 of the pressurized cylinder 704; in step B2, the curved fixing plate 702 is used to bear against a substrate (array substrate or color film substrate) of the curved liquid crystal display;
  • Step B3 starting the pressurizing cylinder 704, causing the piston rod 705 to drive the bending movable plate 703 to approach the other substrate of the curved liquid crystal display, and pressurizing the piston plate 703;
  • Step B4 when a set amount of liquid crystal flows out from the filling port on the curved liquid crystal display, the sealing glue is applied to the filling port by using a sealing glue coating port;
  • Step B5 closing the pressurizing cylinder 705, causing the piston rod 705 to drive the movable plate 703 away from the other substrate in the curved liquid crystal display, and pressing the coated sealing glue into the filling port by atmospheric pressure;
  • Step B6 The UV curing lamp illuminates the coated sealant to cure it.
  • embodiments of the present invention also provide a backlight for providing backlighting for a curved liquid crystal display, as shown in FIG.
  • the backlight includes: a curved light guide plate 801, a plurality of light emitting diodes (LEDs) 802, a plurality of heat sinks (not shown in Fig. 7), and a loop unit (not shown in Fig. 7).
  • the curved light guide plate 801 has the same curvature and the same web size as the curved liquid crystal display, and can be made, for example, of a resin material.
  • the LED 802 is evenly mounted around the curved light guide 801 to ensure that the backlight provided to the curved liquid crystal display uniformly covers the entire display.
  • the number of LEDs 802 can be arranged according to the needs, to avoid the backlight brightness provided when the number is small is too low, or the backlight brightness provided when the number is large is too high.
  • the number of heat sinks is the same as the number of LEDs 802, each of which corresponds to an LED 802 and is disposed with a set area around the LED 802; the loop unit is coupled to the LED 802 and the heat sink, respectively.
  • the flat-sealed curved bonded substrate is aligned with the curved light guide of the backlight; and then the aligned curved bonded substrate and the curved light guide are fixed together by a metal or plastic frame.
  • the backlight can be divided into a direct type backlight system and a side.
  • Light type backlight system refers to a plurality of light sources located behind the liquid crystal panel to provide backlight for the liquid crystal panel
  • the side light type backlight system means that the light source located on the side of the light guide plate provides backlight for the liquid crystal panel.
  • the curved liquid crystal display provided by the embodiment of the present invention has a certain degree of curvature, and if a direct-type backlight system is used, it may be due to A plurality of light sources located behind the liquid crystal panel do not provide a uniform backlight covering the entire screen, which affects the normal display effect of the curved liquid crystal display. ⁇ Using an edge-lit backlight system with a curved backlight (such as the backlight shown in Figure 7), because the curved backlight and curved LCD provide a uniform backlight covering the entire screen, ensuring the normal display of the curved LCD .

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Description

弯曲液晶显示屏及其制造方法和设备 技术领域
本发明的实施例涉及一种弯曲液晶显示屏及其制造方法和设备。 背景技术
液晶显示屏以轻、 薄等优点逐渐成为主流显示装置之一。 目前， 由于多 使用玻璃基板材料， 所以绝大多数液晶显示屏都是平面的。 但是， 对于某些 特殊应用领域， 比如在弧形墙壁上装设广告显示屏等应用场合， 常常需要弯 曲的显示屏。 受玻璃基板材料性能的限制， 制造弯曲液晶显示屏具有较高的 难度。
现有的制造弯曲液晶显示屏的方法中， 有的是利用能够实现弯曲的树脂 型材料作为基板， 也有的釆用在玻璃基板表面贴附薄膜， 利用薄膜的作用力 实现玻璃基板的弯曲。 但是， 由于这些方法制造出的弯曲显示屏中， 基板的 弯曲性质都不是刚性的， 稳定性较差， 随着使用时间的增加， 显示屏的弯曲 度也会发生改变。 发明内容
本发明的实施例提供了一种弯曲液晶显示屏及其制造方法和设备， 用以 制造具有一定弯曲度和弯曲性能稳定的液晶显示屏。
本发明的一个方面提供了一种弯曲液晶显示屏制造方法， 包括： 利用具 有第一热膨胀系数的平面玻璃基板制作阵列基板， 利用具有第二热膨胀系数 的平面玻璃基板制作彩膜基板， 所述第一热膨胀系数不同于所述第二热膨胀 系数； 在所述阵列基板和 /或彩膜基板的表面边缘处涂布封框胶； 对所述阵列 基板和彩膜基板加热， 确定所述阵列基板和彩膜基板都发生热膨胀并且都达 到相同的预设长度和宽度时， 利用所述封框胶将膨胀后的阵列基板和彩膜基 板粘合在一起， 形成粘合基板； 冷却所述粘合基板， 形成具有弯曲度的弯曲 粘合基板。
本发明的另一个方面提供了一种弯曲液晶显示屏， 包括： 利用不同热膨 胀系数的平面玻璃基板制作的具有相同弯曲度的阵列基板和彩膜基板， 以及 夹在所述阵列基板和彩膜基板之间的液晶。
本发明的另一个方面提供了一种灌晶设备， 用于对弯曲液晶显示屏进行 灌晶， 包括： 一个或多个具有设定弯曲度的弯曲液晶槽。
本发明的另一个方面提供了一种整平封口设备， 用于对弯曲液晶显示屏 进行整平封口， 包括： 一对或多对弯曲挤压板， 所述弯曲挤压板具有与所述 弯曲液晶显示屏相同的弯曲度。
本发明的另一个方面提供了一种背光源， 用于为弯曲液晶显示屏提供背 光， 包括： 一弯曲导光板， 所述弯曲导光板具有与所述弯曲液晶显示屏相同 的弯曲度。
本发明的实施例利用具有不同热膨胀系数的两个平面玻璃基板冷却收缩 时会产生不同应力的特点来获得具有一定弯曲度的液晶显示屏。 由于本发明 的实施例是在平面的阵列基板和彩膜基板都膨胀达到相同长度和宽度时才进 行粘合， 与现有的液晶显示屏的制作工艺基本相同， 因此可以在不对现有的 生产设备 ^1大规模改动的情况下大批量生产弯曲液晶显示屏， 并且由于阵列 基板和彩膜基板为刚性弯曲， 所以制造出的弯曲液晶显示屏稳定性好， 不会 随使用时间的改变而发生弯曲度改变。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为现有的制造平面液晶显示屏所用的灌晶设备的结构示意图； 图 2为现有的制造平面液晶显示屏所用的整平封口设备的结构示意图； 图 3 ( a )为本发明实施例提供的一种对盒工艺中两玻璃基板结构示意图； 图 3 ( b )为本发明实施例提供的一种弯曲液晶显示屏结构示意图； 图 4 ( a )为本发明实施例提供的另一种对盒工艺中两玻璃基板结构示意 图；
图 4 ( b )为本发明实施例提供的另一种弯曲液晶显示屏结构示意图； 图 5为本发明实施例提供的一种灌晶设备的结构示意图； 图 6为本发明实施例提供的一种整平封口设备的结构示意图；
图 7为本发明实施例提供的一种背光源的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
下面结合附图， 对本发明实施例提供的一种弯曲液晶显示屏及其制造方 法和设备作进一步详细描述。
本发明的一个实施例提供了一种弯曲液晶显示屏制造方法， 该方法包括 如下步骤。
步骤 101 , 利用具有第一热膨胀系数的平面玻璃基板制作阵列基板， 利 用具有第二热膨胀系数的平面玻璃基板制作彩膜基板， 所述第一热膨胀系数 不同于所述第二热膨胀系数；
步骤 102, 在所述阵列基板和 /或彩膜基板的表面边缘处涂布封框胶； 步骤 103 , 对所述阵列基板和彩膜基板加热， 确定所述阵列基板和彩膜 基板都发生热膨胀并且都达到相同的预设长度和宽度时， 利用所述封框胶将 膨胀后的阵列基板和彩膜基板粘合在一起， 形成粘合基板；
步骤 104, 冷却所述粘合基板， 形成具有弯曲度的弯曲粘合基板。
本实施例的方法利用具有了不同热膨胀系数的两个平面玻璃基板冷却收 缩时会产生不同应力的特点。 首先， 该方法利用具有不同热膨胀系数的两个 平面玻璃基板制作阵列基板和彩膜基板， 然后通过对具有该不同热膨胀系数 的阵列基板和彩膜基板加热，在所述两个基板都膨胀到预设的长度和宽度时， 将二者粘合以形成液晶盒（cell ) , 最后冷却由所述两基板形成的液晶盒， 由 此获得具有一定弯曲度的液晶显示屏。 由于本方法是在平面的阵列基板和彩 膜基板都膨胀达到相同长度和宽度时才进行粘合， 所以与现有的液晶显示屏 的制作工艺基本相同， 因此可以在不对现有的生产设备做大 ¾f莫改动的情况 下大批量生产弯曲液晶显示屏， 并且由于阵列基板和彩膜基板均为刚性弯曲 的， 所以制造出的弯曲液晶显示屏稳定性好， 不会随使用时间的改变而发生 弯曲度改变。
本公开中， 所述热膨胀系数是指物体在热胀冷缩效应的作用下， 几何特 性随着温度的变化而发生变化的规律性系数。 大多数情况下， 物体的热膨胀 系数为正值， 也就是说温度升高、 体积扩大。 对于玻璃这种可以近似看作平 面的物体， 则其长度和宽度就是衡量其体积的决定因素（此时厚度对体积影 响较小， 可忽略） 。 那么， 热膨胀系数又可称作线膨胀系数， 具体指单位温 度的改变下， 其长度或宽度的增加量与原长度或宽度的比值。
本发明的实施例中所提到的利用具有不同膨胀系数的玻璃基板制作的阵 列基板和彩膜基板在加热条件下达到预设的长度和宽度， 是指阵列基板和彩 膜基板的长度达到相同的预设长度， 而且， 宽度达到相同的预设宽度。
需要指出的是， 本公开中的阵列基板的热膨胀系数， 是指制作所述阵列 基板时使用的平面玻璃基板的热膨胀系数； 本公开中提到的彩膜基板的热膨 胀系数， 是指制作所述彩膜基板时使用的平面玻璃基板的热膨胀系数。
本发明实施例的方法中， 为了制造出具有设定弯曲度的液晶显示屏， 可 预先设定弯曲度， 并根据所述弯曲度分别确定所述阵列基板和彩膜基板的初 始长度和初始宽度。 具体的， 弯曲显示屏的弯曲度是由最终两个基板的长度 和宽度决定的。 例如， 当最终彩膜基板的长度和宽度分别大于阵列基板的长 度和宽度时， 在形成液晶盒并冷却后彩膜基板将凹向阵列基板， 且两基板的 长度值和宽度值相差越大， 弯曲度越高； 此外， 利用玻璃基板制作的阵列基 板和彩膜基板在经历热胀冷缩的过程之后， 其长宽尺寸与加热之前的长宽尺 寸相差不大。 基于上述特点， 在制造弯曲液晶显示屏之前， 可预先设计所需 的弯曲度， 并根据所述弯曲度分别确定所述阵列基板和彩膜基板的初始长度 和初始宽度。 这样， 由于最终得到的彩膜基板和阵列基板的长宽尺寸与原始 的长宽尺寸相差不大， 就可以获得满足所述弯曲度的显示屏。
需要指出的是， 本发明实施例提供的弯曲液晶显示屏制造方法， 仅对上 述的各步骤进行了限定， 但这并不意味着本发明方法中只需要上述各步骤。 在其他示例中， 其还可以包括实现制造液晶显示屏的其它各种必要的步骤， 如制作取向层、 喷洒隔垫物等。 本发明实施例提供的弯曲液晶显示屏制造方 法， 对除上述各步骤之外的其他步骤都没有限定， 即不限于其他步骤的具体 实现方式。
优选的， 本发明实施例的方法中， 所述封框胶为热固化型封框胶。
现有显示屏制造工艺中， 常用的封框胶的主要成分为树脂， 分为热固化 型封框胶和光固化型封框胶两种基本类型。 热固化型封框胶通过加热进行固 化， 其粘着强度较高， 光固化型封框胶釆用光照进行固化， 其粘着强度较低。 本发明实施例的方法中优选釆用热固化型封框胶， 以确保粘合后阵列基板和 彩膜基板之间具有较高的粘着力， 进而确保粘合后的两基板在随后的冷却工 艺中仍能具有较好的粘合效果，保证制造出的弯曲液晶显示屏的质量。另夕卜， 由于本发明实施例的方法中需要对阵列基板和彩膜基板进行加热， 因此， 可 借助该加热过程使本发明中涂布的热固化型封框胶固化。
优选的， 本发明实施例的方法中， 所述加热温度为 80摄氏度〜 300摄氏 度。
具体的，本发明实施例的方法中对所述阵列基板和彩膜基板进行加热时， 为了不破坏阵列基板和彩膜基板中各功能单元（例如阵列基板中各个像素单 元中作为开关元件的薄膜晶体管 （TFT ) ) 的性能， 并保证封框胶能够发生 固化， 优选的， 使加热温度在 80摄氏度至 300摄氏度之间。 否则， 温度太高 就会破坏阵列基板和彩膜基板中各功能单元的性能， 而温度太低则封框胶不 能发生固化。
具体的， 可以根据所述阵列基板和彩膜基板的热膨胀系数、 初始长度和 初始宽度， 确定所述两基板都达到所述相同的预设长度和宽度时， 所需加热 温度的具体值（该具体值应确保在 80摄氏度至 300摄氏度之间） 。
具有一定热膨胀系数的阵列基板和彩膜基板的体积膨胀程度与其被加热 温度直接相关。 在所述两基板的热膨胀系数都确定的情况下， 要严格控制所 述加热温度， 以使所述两玻璃基板能够分别由各自的初始长度和宽度， 在发 生热膨胀之后， 达到相同的预设长度和宽度。
需要指出的是， 本发明实施例中所述阵列基板和彩膜基板可以分别在不 同的温度下进行加热， 也可以在相同的温度下进行加热。 本发明实施例对是 否在相同的温度下对所述两基板进行加热没有限定， 只要能够达到本发明所 要实现的膨胀目的即可。
优选的， 本发明实施例的方法中， 利用所述封框胶将膨胀后的阵列基板 和彩膜基板粘合在一起， 形成粘合基板得到液晶盒。 例如， 将所述膨胀后的 阵列基板上的对位标记与所述膨胀后的彩膜基板上的对位标记对齐； 利用所 述封框胶将所述膨胀后的阵列基板和彩膜基板粘合在一起形成粘合基板。
具体的， 在制造弯曲液晶显示屏之前， 应充分考虑到热膨胀过程中， 因 体积变化而引起阵列基板和彩膜基板上对位标记位置的变化， 为了最终获得 具有良好显示效果的弯曲液晶显示屏， 在本发明实施例方法中， 在所述两基 板都膨胀达到所述相同的预设长度和宽度时， 应保证所述两基板上的对位标 记对齐， 以顺利完成对盒工艺 （即通过封框胶将两基板粘合在一起） 。
例如， 考虑到阵列基板和彩膜基板发生热膨胀的过程中， 其体积发生变 化， 基板上对位标记的位置也会发生变化， 为使所述两个基板在都达到所述 相同的预设长度和宽度时， 顺利完成对盒， 可在制造所述阵列基板和彩膜基 板时， 根据釆用的玻璃基板的热膨胀系数， 计算所述两基板分别由各自的初 始长度和宽度膨胀到所述预设长度和宽度时， 各基板上对位标记位置的变化 情况， 并根据所述对位标记位置的变化情况， 分别确定所述两基板上对位标 记的初始位置， 以便在达到所述相同的预设长度和宽度时， 所述两基板上的 对位标记能够对齐； 或者， 可在制造弯曲液晶显示屏之前， 利用仿真软件分 别仿真所述两基板发生热膨胀时， 对位标记位置的变化过程， 并根据所述仿 真过程， 确定所述两基板上对位标记的初始位置， 以便在达到所述相同的预 设长度和宽度时， 所述两基板上的对位标记能够对齐， 以顺利完成对盒。
优选的， 本发明实施例的方法中， 利用所述封框胶将膨胀后的阵列基板 和彩膜基板粘合在一起时， 所述膨胀后的阵列基板上的像素电极与所述膨胀 后的彩膜基板上的彩色滤光片对齐。
显示设备中的最小显示单元为像素， 对应每一像素， 在阵列基板上有像 素电极， 在彩膜基板上有彩色滤光片， 每一像素的像素电极和彩色滤光片应 配合工作才能实现色彩变化的效果。 釆用本发明实施例提供的弯曲液晶显示 屏制造方法时， 应充分考虑到在阵列基板和彩膜基板发生热膨胀的过程中， 因体积变化而引起的阵列基板上像素电极和彩膜基板上彩色滤光片的位置变 化， 为了最终获得具有良好显示效果的弯曲液晶显示屏， 本发明实施例在所 述两基板都膨胀达到所述相同的预设长度和宽度时， 应保证所述阵列基板上 的像素电极和彩膜基板上的彩色滤光片对齐， 这样才能在灌注液晶后， 进一 步得到具有正常显示功能的弯曲液晶显示屏。
例如， 考虑到阵列基板和彩膜基板发生热膨胀的过程中， 其体积发生变 化， 基板上对应每一像素的位置也会发生变化， 为使所述两基板在都达到所 述相同的预设长度和宽度时， 对应同一像素的像素电极和彩色滤光片能够对 齐， 可在制造所述阵列基板和彩膜基板时， 根据釆用的玻璃基板的热膨胀系 数， 计算所述两基板分别由各自的初始长度和宽度膨胀到所述预设长度和宽 度时， 对应每一像素的像素电极和彩色滤光片位置的变化情况， 并根据所述 位置的变化情况， 分别确定所述阵列基板上像素电极的初始位置和彩膜基板 上彩色滤光片的初始位置， 以便在达到所述相同的预设长度和宽度时， 使得 对应同一像素的像素电极和彩色滤光片能够对齐； 或者， 可利用仿真软件分 别仿真所述阵列基板和彩膜基板发生热膨胀时， 对应每一像素的像素电极和 彩色滤光片位置的变化过程， 并根据所述仿真过程， 确定所述阵列基板上像 素电极的初始位置和彩膜基板上彩色滤光片的初始位置， 以便在达到所述相 同的预设长度和宽度时， 使二者对齐。
优选的， 本发明实施例的方法中， 所述冷却为自然冷却。
例如， 为了让热膨胀后的阵列基板和彩膜基板能够产生可预设的弯曲形 变， 本发明实施例的方法中釆用自然冷却。
例如， 本发明实施例的方法还包括： 在所述弯曲粘合基板中灌注液晶。 例如， 本发明实施例的方法中， 在所述弯曲粘合基板中灌注液晶。 又例 如，利用具有弯曲液晶槽的灌晶设备在所述弯曲粘合基板中灌注液晶，其中， 所述弯曲液晶槽具有设定弯曲度的槽壁。
现有的制造液晶显示屏工艺中， 常用的灌晶设备都是针对平面液晶显示 屏的。 图 1为现有的一种灌晶设备的结构示意图， 该灌晶设备包括： 灌晶箱 体 201 , 液晶槽 202, 抽气孔 203 , 抽气泵 204, 放气孔 205, 抽气管道 206 等， 其中盛装液晶的液晶槽 202是长方体型的。 由于液晶的价格昂贵， 因此 一般液晶槽 202的体积较小， 仅用于盛装略多于液晶显示屏所需液晶量的液 晶。 釆用如图 1所示的灌晶设备对平面型液晶显示屏进行灌晶的工艺包括： 釆用抽气泵 204经抽气管道 206和抽气孔 203对灌晶箱体 201进行抽真空处 理， 然后将需灌晶的平面显示屏放入灌晶箱体 201之中， 然后将平面显示屏 上的灌晶口浸入盛满液晶的液晶槽 202中， 最后打开放气孔 205使灌晶箱体 201 中进入适量大气， 通过大气的压力和毛细现象使液晶槽 202中的液晶通 过灌晶口进入所述平面显示屏中。
本发明的实施例中， 制造具有一定弯曲度的液晶显示屏时， 若釆用如图
1所示的灌晶设备对其进行灌晶， 由于液晶槽 202为长方体型的， 则可能不 能够顺利完成灌晶工艺， 并 JU艮可能会造成液晶的浪费。 因此， 本发明实施 例的方法中需要使用具有弯曲液晶槽的灌晶设备完成所述弯曲液晶显示屏制 造过程中的灌晶工艺。 所述弯曲液晶槽的槽壁应具有一定的弯曲度， 所述弯 曲度以能够实现对弯曲粘合基板进行灌晶为准， 可以略大于或略小于所述弯 曲粘合基板的弯曲度。
例如， 所述设定弯曲度与所述弯曲粘合基板的弯曲度相同。
例如， 为了在完成对弯曲液晶显示屏灌晶的同时减少对液晶的浪费， 应 使得所述槽壁的弯曲度恰好等于弯曲粘合基板的弯曲度， 也就是说， 所述弯 曲粘合基板放入所述弯曲液晶槽内进行灌晶时， 从微观上看， 所述槽壁与所 述弯曲粘合基板是平行的。
例如， 本发明实施例的方法还包括： 对所述灌注液晶后的弯曲粘合基板 进行整平封口。
例如， 本发明实施例的方法中， 对所述灌注液晶后的弯曲粘合基板进行 整平封口。 例如， 利用具有弯曲挤压板的整平封口设备对所述灌注液晶后的 弯曲粘合基板进行整平封口， 其中， 所述弯曲挤压板具有与所述弯曲粘合基 板相同的弯曲度。
现有的制造液晶显示屏工艺中， 常用的整平封口设备都是针对平面液晶 显示屏的。 图 2为现有的一种整平封口设备的结构示意图， 该整平封口设备 包括： 机架 301、 固定板 302、 活动板 303、 加压气缸 304、 活塞杆 305、 封 口胶涂布口 （图 2中未示出） 、 UV固化灯（图 2中未示出）等。 为了实现 整平工艺的目的， 即通过刚体加压的机械方式强行校正平面液晶显示基板中 两基板的不平行度， 使阵列基板与彩膜基板各部位所夹的液晶厚薄均匀， 所 述整平封口设备中固定板 302和活动板 303都为平面板型结构。 釆用图 2所 示的整平封口设备对平面液晶显示屏进行整平封口的工艺包括： 首先釆用固 定板 302顶住平面液晶显示屏中的一个基板， 然后釆用加压气缸 304的活塞 杆 305带动活动板 303向平面液晶显示屏中的另一基板靠近， 并对其进行加 压； 当平面液晶显示屏上的灌晶口中流出设定量液晶时， 釆用封口胶涂布口 对平面液晶显示屏的灌晶口涂布封口胶， 接着加压气缸 304的活塞杆 305带 动活动板 303离开平面液晶显示屏中的另一基板， 借助大气压将涂布的封口 胶压入所述灌晶口中； 最后釆用 UV固化灯对涂布的封口胶进行光照使其固 化。
与上述灌晶工艺类似， 本发明实施例中制造具有一定弯曲度的液晶显示 屏时，若釆用如图 2所示的整平封口设备对其进行整平封口，由于固定板 302 和活动板 303都是平面板型结构， 而弯曲粘合基板的两基板都是弯曲的， 所 以不能完成对弯曲粘合基板的整平封口工艺， 并且极有可能损坏弯曲粘合基 板的两基板。 因此， 本发明实施例的方法中需要使用具有一定弯曲度的板型 结构 （以下简称弯曲挤压板）对所述灌注液晶后的弯曲粘合基板进行整平封 口， 并且， 为了使得所述弯曲粘合基板中的阵列基板和彩膜基板各部位所夹 的液晶厚薄均匀， 应使得所述弯曲挤压板具有与所述弯曲粘合基板相同的弯 曲度。 需要指出的是， 为了分别对本发明实施例的中的弯曲阵列基板和弯曲 彩膜基板进行整平， 所述弯曲挤压板应为对称设置的两个， 例如可以为成对 设置的具有一定弯曲度的固定板（以下简称弯曲固定板）和具有一定弯曲度 的活动板（以下简称弯曲活动板） 。
例如， 本发明实施例的方法还包括： 将所述整平封口后的弯曲粘合基板 与背光源组合。
例如， 本发明实施例的方法中， 将所述整平封口后的弯曲粘合基板与背 光源组合。 例如， 将所述整平封口后的弯曲粘合基板与具有弯曲导光板的背 光源对齐， 其中， 所述弯曲导光板具有与所述弯曲粘合基板相同的弯曲度； 将所述对齐的弯曲粘合基板和所述具有弯曲导光板的背光源固定在一起。
例如， 本发明实施例制造的弯曲液晶显示屏具有一定的弯曲度， 若釆用 现有的针对平面液晶显示屏的背光源为其提供背光， 由于现有的针对平面液 晶显示屏的背光源中， 导光板为平面板型结构， 则会造成弯曲液晶显示屏背 光线的不均匀， 影响画面质量。 因此， 本发明实施例的方法中需釆用具有弯 曲导光板的背光源为其提供背光， 并且， 所述弯曲导光板具有与所述弯曲液 晶显示屏相同的弯曲度。
需要指出的是， 本发明实施例提供的弯曲液晶显示屏制造方法中， 所述 阵列基板和所述彩膜基板的初始长度和初始宽度应分别不同。 由于阵列基板 和彩膜基板经历热胀冷缩的过程之后， 其长度和宽度与加热之前的长度和宽 度（即初始长度和宽度）相差不大， 并且最终获得的弯曲显示屏的弯曲度具 体是由最终阵列基板和彩膜基板的长度和宽度决定的。 那么， 最终获得的弯 曲显示屏的弯曲度可由两基板的初始长度和宽度确定， 为使两基板经历热胀 冷缩的过程之后具有一定的弯曲度， 应令所述两基板的初始长度和初始宽度 分别不同； 此外， 由于所述阵列基板和彩膜基板的热膨胀系数不同， 为使所 述两基板能够膨胀达到相同的预设长度和宽度， 也应令所述两基板具有不同 的初始长度和宽度。
本发明实施例提供的弯曲液晶显示屏制造方法中， 制造阵列基板和彩膜 基板所用的玻璃基板都为平面玻璃基板， 也就是说， 本发明例如可釆用现有 显示屏制造工艺所常用的平面玻璃基板材料， 以实现在现有原材料和现有工 艺的基础上， 进行较小的工艺改进就可实现大批量的弯曲显示屏制造， 节约 制造成本。
相应的， 本发明实施例还提供一种弯曲液晶显示屏， 包括： 利用不同热 膨胀系数的平面玻璃基板制作的具有相同弯曲度的阵列基板和彩膜基板， 以 及夹在所述阵列基板和彩膜基板之间的液晶， 所述弯曲液晶显示屏是通过上 述弯曲液晶显示屏制造方法制造的。
具体的， 釆用上述弯曲液晶显示屏制造方法可以根据实际需要制造出凸 型弯曲显示屏或凹形弯曲显示屏。 当彩膜基板的热膨胀系数大于阵列基板的 热膨胀系数时， 如图 3 ( a )所示， 加热所述两基板使其都膨胀达到相同的预 设长度和宽度时， 将两基板对齐， 使用封框胶将二者粘合以形成液晶盒； 如 图 3 ( b )所示， 在冷却的过程中， 由于彩膜基板收缩较大， 阵列基板收缩较 小，在应力的作用下自然就形成了彩膜基板凸向所述阵列基板的弯曲显示屏。 当所述彩膜基板的热膨胀系数小于阵列基板的热膨胀系数时， 如图 4 ( a )所 示， 加热所述两基板使其都膨胀达到相同的预设长度和宽度时， 将两基板对 齐， 完成对盒； 如图 4 ( b )所示， 在冷却的过程中， 由于彩膜基板收缩较小， 阵列基板收缩较大， 在应力的作用下自然就形成了彩膜基板凹向所述阵列基 板的弯曲显示屏。
本发明的另一个实施例还提供一种灌晶设备， 用于对弯曲显示屏进行灌 晶， 如图 5所示， 包括： 灌晶箱体 601 , 弯曲液晶槽 602, 抽气孔 603 , 抽气 泵 604, 放气孔 605 , 抽气管道 606, 其中， 抽气孔 603和放气孔 605位于灌 晶箱体 601的箱体表面， 弯曲液晶槽 602具有一定的弯曲度， 并被置于灌晶 箱体 601之中， 抽气泵 604通过抽气管道 606和抽气孔 603与灌晶箱体 601 连接。
该灌晶设备可具有一个或多个弯曲液晶槽 602, 每一弯曲液晶槽 602都 具有一定的弯曲度和一定的容积。 不同的弯曲液晶槽 602可具有相同的弯曲 度和不同的容积， 或具有不同的弯曲度和不同的容积， 或具有不同的弯曲度 和相同的容积。 当釆用该灌晶设备对弯曲显示基板进行灌晶时， 可根据所述 弯曲显示基板的具体弯曲度和所需的液晶容量， 选择具有合适弯曲度和容积 的弯曲液晶槽 602。
釆用如图 5所示的灌晶设备对弯曲显示屏进行灌晶， 包括如下步骤。 步骤 A1 ,根据所述弯曲显示屏的弯曲度和所需的液晶容量，选择合适的 弯曲液晶槽 602, 放入灌晶箱体 601中；
步骤 A2, 釆用抽气泵 604对灌晶箱体 601进行抽真空处理；
步骤 A3 ,将需灌晶的弯曲显示屏放入灌晶箱体 601之中，并将弯曲显示 屏上的灌晶口浸入盛满液晶的弯曲液晶槽 602中；
步骤 A4,打开放气孔 605使灌晶箱体 601中进入适量大气，通过大气的 压力和毛细现象使弯曲液晶槽 602中的液晶通过灌晶口进入弯曲显示屏中。
相应的，本发明还提供一种整平封口设备，如图 6所示，包括：机架 701、 弯曲固定板 702、 弯曲活动板 703、 加压气缸 704、 活塞杆 705、 封口胶涂布 口 （图 6中未示出）， UV固化灯（图 6中未示出）， 其中， 弯曲固定板 702 固定于机架 701的底座上， 加压气缸 704固定于机架 701的顶部， 加压气缸 704的活塞杆 705末端固定有弯曲活动板 703 ,并且弯曲活动板 703与弯曲固 定板 702相对设置， 封口胶涂布口和 UV固化灯装设于机架 701上。
该整平封口设备中弯曲固定板 702和弯曲活动板 703成对设置， 且具有 相同的弯曲度和幅面大小，此外，该整平封口设备可具有多对弯曲固定板 702 和弯曲活动板 703 , 其中， 不同对的弯曲固定板 702和弯曲活动板 703的弯 曲度可以相同或不同， 幅面大小也可以相同或不同。 当釆用该整平封口设备 对弯曲液晶显示屏进行整平封口时， 可根据所述弯曲液晶显示基板的具体弯 曲度和幅面大小， 选择具有合适弯曲度和合适幅面的弯曲固定板 702与弯曲 活动板 703。
釆用该整平封口设备对弯曲液晶显示屏进行整平封口的过程， 例如包括 如下步骤。
步骤 B1 ,根据所述弯曲液晶显示屏的弯曲度和幅面大小，选择合适的弯 曲固定板 702 与弯曲活动板 703 , 并将所选的弯曲固定板 702垂直固定于机 架 701上，将所选的弯曲活动板 703固定于加压气缸 704的活塞杆 705末端； 步骤 B2,釆用弯曲固定板 702顶住弯曲液晶显示屏的一个基板（阵列基 板或彩膜基板） ；
步骤 B3 , 启动加压气缸 704, 使其活塞杆 705带动弯曲活动板 703向弯 曲液晶显示屏的另一基板靠近， 对其进行加压；
步骤 B4, 当弯曲液晶显示屏上的灌晶口中流出设定量的液晶时，釆用封 口胶涂布口对所述灌晶口涂布封口胶；
步骤 B5 , 关闭加压气缸 705 , 使其活塞杆 705带动活动板 703离开弯曲 液晶显示屏中的另一基板， 借助大气压将涂布的封口胶压入所述灌晶口中； 步骤 B6, 釆用 UV固化灯对涂布的封口胶进行光照以使其固化。
相应的， 本发明的实施例还提供一种背光源， 为弯曲液晶显示屏提供背 光， 如图 7所示。 该背光源包括： 弯曲导光板 801、 若干发光二极管（LED ) 802、 若干散热器（图 7中未画出）和回路单元（图 7中未画出）。 弯曲导光 板 801具有与所述弯曲液晶显示屏相同的弯曲度和相同的幅面大小， 例如可 以釆用树脂类材质制作。 LED 802均匀装设于弯曲导光板 801的四周， 以确 保提供给弯曲液晶显示屏的背光能够均匀覆盖整个显示屏。 LED 802的个数 可根据需要适量安排， 避免个数较少时提供的背光亮度过低， 或个数较多时 提供的背光亮度过高。散热器的数量与 LED 802的数量一致，每一散热器都 对应于一个 LED 802, 并装设与该 LED 802周围的设定区域； 回路单元分别 与所述 LED 802和散热器连接。
为弯曲液晶显示屏安装如图 7所示的背光源时， 可以如下进行。
首先， 将整平封口后的弯曲粘合基板与所述背光源的弯曲导光板对齐； 然后， 通过金属或胶框将对齐后的弯曲粘合基板和弯曲导光板固定在一起。
需要指出的是， 在液晶显示领域， 背光源可以分为直下型背光系统和侧 光型背光系统。 直下型背光系统是指位于液晶面板后面的多个光源为液晶面 板提供背光， 而侧光型背光系统是指位于导光板侧面的光源为液晶面板提供 背光。 本发明实施例的如图 7所示的背光源为侧光型背光系统， 这是由于本 发明实施例提供的弯曲液晶显示屏具有一定的弯曲度， 若釆用直下型背光系 统， 可能会由于位于液晶面板后面的多个光源不能提供覆盖整个屏幕的均匀 背光， 而影响弯曲液晶显示屏的正常的显示效果。 釆用具有弯曲背光板的侧 光型背光系统（如图 7所示的背光源） ， 由于弯曲背光板与弯曲液晶显示屏 提供覆盖整个屏幕的均勾背光， 确保弯曲液晶显示屏正常的显示效果。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种弯曲液晶显示屏制造方法， 包括：
利用具有第一热膨胀系数的平面玻璃基板制作阵列基板， 利用具有第二 热膨胀系数的平面玻璃基板制作彩膜基板， 所述第一热膨胀系数不同于所述 第二热膨胀系数；
在所述阵列基板和 /或彩膜基板的表面边缘处涂布封框胶；
对所述阵列基板和彩膜基板加热， 确定所述阵列基板和彩膜基板都发生 热膨胀并且都达到相同的预设长度和宽度时， 利用所述封框胶将膨胀后的阵 列基板和彩膜基板粘合在一起， 形成粘合基板；
冷却所述粘合基板， 形成具有弯曲度的弯曲粘合基板。
2、 如权利要求 1所述的方法， 其中， 所述封框胶为热固化型封框胶。
3、 如权利要求 1或 2所述的方法， 其中， 所述加热温度为 80 -300摄氏 度。
4、 如权利要求 1-3任一所述的方法， 其中， 利用所述封框胶将膨胀后的 阵列基板和彩膜基板粘合在一起， 形成粘合基板， 包括：
将所述膨胀后的阵列基板上的对位标记与所述膨胀后的彩膜基板上的对 位标记对齐；
利用所述封框胶将所述膨胀后的阵列基板和彩膜基板粘合在一起形成粘 合基板。
5、 如权利要求 1-4任一所述的方法， 还包括： 在所述弯曲粘合基板中灌 注液晶。
6、 如权利要求 5所述的方法， 其中， 在所述弯曲粘合基板中灌注液晶， 包括：
利用具有弯曲液晶槽的灌晶设备在所述弯曲粘合基板中灌注液晶，其中， 所述弯曲液晶槽具有设定弯曲度的槽壁。
7、如权利要求 6所述的方法， 其中， 所述设定弯曲度与所述弯曲粘合基 板的弯曲度相同。
8、 如权利要求 5-7任一所述的方法， 还包括： 对所述灌注液晶后的弯曲 粘合基板进行整平封口。
9、如权利要求 8所述的方法， 其中，对所述灌注液晶后的弯曲粘合基板 进行整平封口， 包括：
利用具有弯曲挤压板的整平封口设备对所述灌注液晶后的弯曲粘合基板 进行整平封口， 其中， 所述弯曲挤压板具有与所述弯曲粘合基板相同的弯曲 度。
10、 如权利要求 8或 9所述的方法， 还包括： 将所述整平封口后的弯曲 粘合基板与背光源组合。
11、如权利要求 10所述的方法， 其中，将所述整平封口后的弯曲粘合基 板与背光源组合， 具体包括：
将所述整平封口后的弯曲粘合基板与具有弯曲导光板的背光源对齐， 其 中， 所述弯曲导光板具有与所述弯曲粘合基板相同的弯曲度；
将所述对齐的弯曲粘合基板和所述具有弯曲导光板的背光源固定在一 起。
12、 一种弯曲液晶显示屏， 包括： 利用不同热膨胀系数的平面玻璃基板 制作的具有相同弯曲度的阵列基板和彩膜基板， 以及夹在所述阵列基板和彩 膜基板之间的液晶。
13、 一种灌晶设备， 用于对弯曲液晶显示屏进行灌晶， 包括： 一个或多 个具有设定弯曲度的弯曲液晶槽。
14、如权利要求 13所述灌晶设备， 其中， 所述弯曲液晶槽的弯曲度与所 述弯曲液晶显示屏的弯曲度相同。
15、 一种整平封口设备， 用于对弯曲液晶显示屏进行整平封口， 包括： 一对或多对弯曲挤压板， 所述弯曲挤压板具有与所述弯曲液晶显示屏相同的 弯曲度。
16、 一种背光源， 用于为弯曲液晶显示屏提供背光， 包括： 弯曲导光板， 所述弯曲导光板具有与所述弯曲液晶显示屏相同的弯曲度。
PCT/CN2012/083714 2012-05-11 2012-10-29 弯曲液晶显示屏及其制造方法和设备 Ceased WO2013166813A1 (zh)

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