WO2021068395A1 - 触控显示装置及其制作方法 - Google Patents

触控显示装置及其制作方法 Download PDF

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Publication number
WO2021068395A1
WO2021068395A1 PCT/CN2019/123463 CN2019123463W WO2021068395A1 WO 2021068395 A1 WO2021068395 A1 WO 2021068395A1 CN 2019123463 W CN2019123463 W CN 2019123463W WO 2021068395 A1 WO2021068395 A1 WO 2021068395A1
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WO
WIPO (PCT)
Prior art keywords
adhesive layer
glue
frame
touch panel
cover plate
Prior art date
Application number
PCT/CN2019/123463
Other languages
English (en)
French (fr)
Inventor
周明军
石振华
Original Assignee
深圳市华星光电半导体显示技术有限公司
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 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US16/626,527 priority Critical patent/US20210333902A1/en
Publication of WO2021068395A1 publication Critical patent/WO2021068395A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B32B37/1292—Application of adhesive selectively, e.g. in stripes, in patterns
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1207—Heat-activated adhesive
    • B32B2037/1215—Hot-melt adhesive
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/44—Number of layers variable across the laminate
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/60—In a particular environment
    • B32B2309/68—Vacuum
    • 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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/206—Organic displays, e.g. OLED
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/0015—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid warp or curl
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • This application relates to the field of display technology, and in particular to a touch display device and a manufacturing method thereof.
  • Touch Panel also known as touch screen or touch screen, is a device that is formed on the display surface of an image display device and uses conductors such as a human body or a capacitive pen to input instructions. It can replace a mouse, a keyboard, etc. Input devices such as external input devices and mechanical input keys can effectively simplify the structure of electronic products such as computers, mobile phones, electronic meters, and game equipment, and have very broad application prospects.
  • touch panels are mainly capacitive, resistive, ultrasonic and infrared.
  • Infrared touch technology currently occupies a large part of the touch market by virtue of accurate touch accuracy and relatively low cost advantages.
  • infrared touch technology is not suitable for occasions with strong light.
  • capacitive touch technology has the advantages of its relatively sensitive touch Reflected, used and sought after by more and more users.
  • FIG. 1 is a schematic diagram of a layered structure of a touch display device in the prior art.
  • the touch display device includes a display panel (Display Panel) 11, a touch panel (TP) 13, and a cover glass (Cover Glass, referred to as CG) 15, and solid optically clear adhesive (Solid Optically Clear Adhesive, referred to as SOCA) 19 between adjacent components is implemented using full-sticking technology fit.
  • Display Panel Display Panel
  • TP touch panel
  • CG cover glass
  • SOCA Solid Optically Clear Adhesive
  • the purpose of this application is to provide a touch display device and a manufacturing method thereof in view of the problems existing in the prior art, which can use a small amount of optical glue and adopt a vacuum bonding method, so that the cover plate, the touch panel and the display panel Closely fit, save optical glue materials and improve product yield.
  • the present application provides a manufacturing method of a touch display device, which includes the following steps: providing a display panel; covering a full-stick adhesive layer on the upper surface of the display panel, wherein the full-stick adhesive layer
  • the glue layer is liquid optical glue
  • a touch panel is placed on the upper surface of the display panel, so that the touch panel and the middle of the display panel are disposed oppositely, and the lower surface of the touch panel is attached to the The upper surface of the full adhesive layer; attach a first frame adhesive layer to the edge of the upper surface of the touch panel, wherein the first frame adhesive layer is liquid adhesive; a solid
  • the optical glue is cut into strips of glue and attached to the upper surface of the first frame of the adhesive layer, wherein the width of the strip of glue is smaller than the width of the first frame of the adhesive;
  • a cover plate is placed on the upper surface of the touch panel so that the cover plate is disposed opposite to the middle of the touch panel, and the upper surface of the strip-shaped glue block is attached to the lower surface of the cover plate;
  • the present application provides a touch display device, including: a display panel; a full adhesive layer covering the upper surface of the display panel; a touch panel attached to the full adhesive The upper surface of the layer, wherein the touch panel is disposed opposite to the middle of the display panel; a frame adhesive layer is attached to the edge of the upper surface of the touch panel; and a vacuum cavity is formed in the The middle part of the frame adhesive layer; and a cover plate attached to the upper surface of the frame adhesive layer, and the cover plate is arranged opposite to the middle part of the touch panel.
  • the present application also provides a manufacturing method of a touch display device, which includes the following steps: providing a display panel; covering a full adhesive layer on the upper surface of the display panel; placing a touch panel Placed on the upper surface of the display panel so that the touch panel is disposed opposite to the middle of the display panel, and the lower surface of the touch panel is attached to the upper surface of the full adhesive layer; a frame is attached
  • the adhesive layer is attached to the edge of the upper surface of the touch panel; a cover is placed on the upper surface of the touch panel so that the cover is disposed opposite to the middle of the touch panel, and the frame
  • the upper surface of the adhesive layer is attached to the lower surface of the cover plate; and in a vacuum environment, the cover plate, the touch panel, and the display panel after the adhesive layer is attached are irradiated with ultraviolet rays, so that all The full adhesive layer and the frame adhesive layer are cured, and a vacuum cavity is formed in the middle of the frame adhesive layer.
  • the display panel and the touch panel are bonded through liquid optical glue using full bonding technology, and the cover plate is bonded with the touch panel through solid optical glue using frame bonding technology to form a vacuum cavity.
  • the cover plate, the touch panel and the display panel are closely attached, the surface of the touch area is better, the sensitivity of the touch operation is higher, the touch experience is better, and the optical glue is effectively saved
  • the material reduces the production cost, avoids the problems of yellowing, bending with different expansion and contraction, and wrinkles in the visible area, and improves the product yield.
  • FIG. 1 is a schematic diagram of a layered structure of a touch display device in the prior art
  • FIG. 2 is a schematic diagram of the layered structure of an embodiment of the touch display device of the present application.
  • FIG. 3 is a schematic diagram of a layered structure of another embodiment of the touch display device of the present application.
  • FIG. 4 is a flow chart of the manufacturing method of the touch display device of the present application.
  • the “above” or “below” of the first feature on the second feature may include the first and second features in direct contact, or may include the first and second features. Not in direct contact but through other features between them.
  • “above”, “above” and “above” the first feature include the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature.
  • the first feature is "below”, “below” and “below” the second feature, including the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • FIG. 2 is a schematic diagram of the layered structure of an embodiment of the touch display device of the present application.
  • the touch display device includes: a display panel 21, a touch panel 23, and a cover 25; a full adhesive layer is passed between the display panel 21 and the touch panel 23 22 is attached, the cover 25 is attached to the touch panel 23 through a frame adhesive layer 24, and there is a vacuum chamber 26 between the touch panel 23 and the cover 25.
  • the display panel 21 may be a liquid crystal display panel (Liquid Crystal Display, abbreviated as LCD), organic light-emitting diode display panel (Organic Light Emitting Diode, OLED for short, Active-Matrix Organic Light Emitting Diode Display Panel (Active-Matrix Organic Light Emitting Diode) Diode, AMOLED for short), quantum dot light-emitting diode display panel (Quantum-Dot Light Emitting Diode, QLED for short), etc.
  • the display panel 21 is used to provide a display screen for the touch display device.
  • the touch panel 23 is attached to the upper surface of the display panel 21 and is disposed opposite to the middle of the display panel 21.
  • the touch panel 23 and the display panel 21 have the same shape and the same size, so that the operable area of the touch panel 23 and the display area of the display panel 21 can be further effectively ensured. Unanimous.
  • the fully adhesive layer 22 covers the upper surface of the display panel 21, and the lower surface of the touch panel 23 is attached to the upper surface of the fully adhesive layer 22, so that the touch panel 23 and the The display panel 21 is attached.
  • the full adhesive layer 22 may be liquid optical adhesive (Liquid Optical Adhesive). Clear Adhesive, LOCA for short).
  • LOCA is a special adhesive used for the bonding of transparent optical components. It is colorless and transparent, with a light transmittance of more than 98%, which can ensure accurate color and sufficient display brightness; and good bonding strength, which can be cured under normal or medium temperature conditions , And has the characteristics of low curing shrinkage and resistance to yellowing. Since the fully glued layer 22 uses liquid optical glue and fully covers the upper surface of the display panel 21, the touch panel 23 and the display panel 21 can be glued together using liquid optical glue using a full sticking technology. .
  • the cover plate assembly adopts the full-fit technology, the surface of the touch area is better, the sensitivity of the touch operation is also higher, and the touch experience is also better.
  • the cover plate 25 is attached to the upper surface of the touch panel 23, and the cover plate 25 is disposed opposite to the middle of the touch panel 23.
  • the cover 25 is used to protect the touch panel 23 and the display panel 21, and the user can directly perform touch operations on the cover 25.
  • the surface area of the cover plate 25 is larger than that of the touch panel 23, so that the cover plate 25 can fully cover the touch panel 23, so that the user touches the cover plate 25
  • the operation has good sensitivity and is conducive to the realization of a narrow frame design.
  • the cover plate 25 is preferably a glass cover plate.
  • the frame adhesive layer 24 is attached to the edge of the upper surface of the touch panel 23, and the cover plate 25 is attached to the upper surface of the frame adhesive layer 24 so that the cover plate 25 is attached to the upper surface of the touch panel 23.
  • the touch panel 23 is attached.
  • the vacuum chamber 26 is formed in the middle of the frame adhesive layer 24. Since the middle part of the touch panel 23 and the middle part of the cover plate 25 form a vacuum and are attached to each other under the action of atmospheric pressure, the space occupied by the vacuum chamber 26 is compressed to a minimum, so that the cover plate 25 and the cover plate 25 The touch panel 23 can be closely attached to each other. Therefore, the user's operation on the cover plate 25 that fully covers the touch panel 23 has good sensitivity.
  • the frame adhesive layer 24 may be a solid optical adhesive (Solid Optically Clear Adhesive, abbreviated as SOCA), solid optical adhesive can be melted under heating conditions, and can be cured under UV light conditions. Since the frame glue layer 24 uses solid optical glue and is attached to the edge of the upper surface of the touch panel 23, the cover plate 25 and the touch panel 23 can be made of solid optical glue. Frame bonding technology fits. Since a large amount of optical glue is required in the full-bonding technology, which greatly increases the manufacturing cost of the panel, frame bonding technology is adopted between the cover plate 25 and the touch panel 23 to effectively save optical glue materials.
  • SOCA Solid Optically Clear Adhesive
  • the frame adhesive layer 24 includes: a first frame adhesive layer 241 and a second frame adhesive layer 242.
  • the first frame sticker adhesive layer 241 is attached to the edge of the upper surface of the touch panel 23; the second frame sticker adhesive layer 242 is attached to the first frame sticker adhesive layer 241 The upper surface; the cover plate 25 is attached to the upper surface of the second frame sticker adhesive layer 242, so that the cover plate 25 is attached to the touch panel 23.
  • the vacuum chamber 26 is formed in the middle of the first frame sticker adhesive layer 241 and the second frame sticker adhesive layer 242.
  • the first frame sticker adhesive layer 241 adopts an adhesive with higher adhesion, which plays a role of pre-fixing and positioning for the second frame sticker adhesive layer 242, avoiding the The second frame sticker adhesive layer 242 is skewed; the first frame sticker adhesive layer 241 can be liquid glue or solid glue, as long as the second frame sticker adhesive layer 242 can be closely attached to the The first frame sticker adhesive layer 241 only needs to keep the positions of the second frame sticker adhesive layer 242 and the first frame sticker adhesive layer 241 consistent.
  • the second frame adhesive layer 242 is a solid optical adhesive, and the width of the second frame adhesive layer 242 is less than or equal to the width of the first frame adhesive layer 241, which is convenient for the second frame
  • the sticker adhesive layer 242 is attached to the upper surface of the first frame sticker adhesive layer 241 to prevent the second frame sticker adhesive layer 242 from being crooked or falling off.
  • Figure 2 is used to illustrate the positional relationship of the components. In fact, the adhesive layer is melted and UV cured by vacuuming and heating. The middle part of the cover plate 25 and the middle part of the touch panel 23 are attached to each other under the action of atmospheric pressure. The space occupied by the vacuum chamber 26 is compressed to an extremely small amount, which effectively guarantees the sensitivity of the touch operation.
  • the uncured optical adhesive Since the uncured optical adhesive has extremely low adhesion, especially when the display panel design with a narrow frame is implemented, if the optical adhesive is directly attached to the upper surface of the touch panel 23, the optical adhesive is easily attached. Crooked, during the curing process of the optical glue, the cover plate 25 and the touch panel 23 cannot be closely attached, thereby affecting the quality of the display panel; the cured optical glue has superior weather resistance, especially excellent.
  • the anti-spreading and anti-explosive performance of the display greatly improves the safety, reliability, durability and aesthetics of the display field. It has the characteristics of high light fitness, high bonding strength, low haze, low shrinkage and yellowing resistance.
  • the second frame adhesive layer 241 made of a narrow solid optical adhesive material is prevented.
  • the adhesive layer 242 is skewed or peeled off during the alignment and attachment, which avoids potential safety hazards and inaccurate alignment problems.
  • the shape of the second frame sticker adhesive layer 242 is a ring shape, so that when the cover plate 25 and the touch panel 23 are bonded by frame bonding technology, they can be closely bonded. Since the shape of the second frame sticker adhesive layer 242 is ring-shaped, the shape of the first frame sticker adhesive layer 241 is preferably ring-shaped. The first frame sticker adhesive layer 241 and the second frame sticker adhesive layer 242 have the same shape so that when the vacuum frame is attached, the cover plate 25 and the touch panel 23 can be closely attached. Put together, while avoiding the phenomenon of crooked or falling off of the second frame sticker adhesive layer 242 during the attaching process.
  • the touch display device In the touch display device provided in the present application, during the panel bonding process, the display panel and the touch panel are bonded using liquid optical glue using full bonding technology, and the cover is bonded and combined with the touch panel using solid optical glue using frame bonding technology. A vacuum cavity is formed.
  • the cover plate, the touch panel and the display panel are closely attached, the surface of the touch area is better, the sensitivity of the touch operation is higher, and the touch experience is better , And effectively saves optical glue materials, reduces production costs, avoids problems such as bonding yellowing, bending with different expansion and contraction, and wrinkles in the visible area, and improves product yield.
  • FIG. 3 is a schematic diagram of the layered structure of another embodiment of the touch display device of the present application.
  • the adhesive layer is melted and UV cured by vacuuming and heating.
  • the middle of the cover plate 25 And the middle part of the touch panel 23 are attached to each other under the action of atmospheric pressure, the space occupied by the vacuum chamber 26 is compressed to a minimum, and the cover plate 25 is closely attached to the touch panel 23, thereby effectively Ensure the sensitivity of touch operation.
  • FIG. 4 is a flowchart of the manufacturing method of the touch display device of the present application. The method includes the following steps:
  • S41 Provide a display panel.
  • the display panel 21 is used to provide a display screen for the touch display device.
  • S43 Place a touch panel on the upper surface of the display panel, so that the touch panel is arranged opposite to the middle of the display panel, and the lower surface of the touch panel is attached to the adhesive layer Upper surface.
  • a CCD alignment method or a tool-assisted positioning method may be used, so that the touch panel 23 is disposed opposite to the middle of the display panel 21.
  • the touch panel 23 and the display panel 21 have the same shape and the same size, so that the operable area of the touch panel 23 and the display area of the display panel 21 can be further effectively ensured. Unanimous.
  • the full adhesive layer 22 may be liquid optical adhesive. Since the fully glued layer 22 uses liquid optical glue and fully covers the upper surface of the display panel 21, the touch panel 23 and the display panel 21 can be glued together using liquid optical glue using a full sticking technology. , The surface of the touch area after bonding is better, the sensitivity of touch operation is also higher, and the touch experience is better.
  • S45 Place a cover plate on the upper surface of the touch panel so that the cover plate is disposed opposite to the middle of the touch panel, and the upper surface of the frame adhesive layer is attached to the bottom of the cover plate. surface.
  • a CCD alignment method or a tool-assisted positioning method may be used, so that the cover plate 25 is arranged opposite to the middle of the touch panel 23.
  • the cover 25 is used to protect the touch panel 23 and the display panel 21, and the user can directly perform touch operations on the cover 25.
  • the surface area of the cover plate 25 is larger than the surface area of the touch panel 23, so that the cover plate 25 can fully cover the touch panel 23, so that the user touches the cover plate 21
  • the operation has good sensitivity and is conducive to the realization of a narrow frame design.
  • the cover plate 25 is preferably a glass cover plate.
  • the frame adhesive layer 24 may use solid optical adhesive. Since the frame glue layer 24 uses solid optical glue and is attached to the edge of the upper surface of the touch panel 23, the cover plate 25 and the touch panel 23 can be made of solid optical glue. Frame bonding technology fits. Since a large amount of optical glue needs to be used in the full-bonding technology, which greatly increases the manufacturing cost of the panel, a frame bonding technology is adopted between the cover plate 25 and the touch panel 23 to effectively save optical glue materials.
  • the cover 25, the touch panel 23, and the display panel 21 after the adhesive layer is attached can be sent into a vacuum device, and then in a sealed environment, the vacuum device is evacuated by a vacuum pump, and then Using a heating module in the vacuum device (for example, a heating tube provided in the equipment of the vacuum device), the cover plate 25, the touch panel 23, and the display panel 21 after the adhesive layer is attached
  • a heating module in the vacuum device for example, a heating tube provided in the equipment of the vacuum device
  • the heating process causes the frame adhesive layer 24 using solid optical adhesive to melt.
  • the frame adhesive layer 24 will melt and level under the dual effects of heating and pressure, so that the edge of the touch panel 23 is closely attached to the edge of the cover 25; and the touch panel
  • the middle part between 23 and the cover plate 25 is a vacuum area surrounded by the frame adhesive layer 24, so that the middle part between the touch panel 23 and the cover plate 25 closely fits under the action of atmospheric pressure , Effectively ensure the sensitivity of touch operation.
  • step S44 further includes: 41) covering a first frame adhesive layer on the edge attached to the upper surface of the touch panel; and 42) cutting a solid optical adhesive into The strip-shaped adhesive block is attached to the upper surface of the adhesive layer of the first frame.
  • step S45 further includes: 51) in a vacuum environment, heating the cover plate, the touch panel, and the display panel after the adhesive layer is attached, so that the strip-shaped adhesive block is melted; And 52) The cover plate, the touch panel, and the display panel after the adhesive layer is attached by ultraviolet irradiation, so that the full adhesive layer is cured, and at the same time the melted strip-shaped adhesive block is It is cured into a second frame sticker adhesive layer, and the vacuum cavity is formed in the middle of the first frame sticker adhesive layer and the second frame sticker adhesive layer.
  • the first frame sticker adhesive layer 241 adopts an adhesive with high adhesion, which plays a role of pre-fixing and positioning for the second frame sticker adhesive layer 242, avoiding the The second frame sticker adhesive layer 242 is skewed; the first frame sticker adhesive layer 241 can be liquid glue or solid glue, as long as the second frame sticker adhesive layer 242 can be closely attached to the The first frame sticker adhesive layer 241 only needs to keep the positions of the second frame sticker adhesive layer 242 and the first frame sticker adhesive layer 241 consistent.
  • the first frame sticker adhesive layer 241 is connected end to end to prepare for the subsequent process, but it is not limited to this, and those skilled in the art can set it according to actual needs.
  • the second frame sticker adhesive layer 242 is a solid optical glue
  • the width of the second frame sticker adhesive layer 242 is less than or equal to the width of the first frame sticker adhesive layer 241
  • Step 42) further includes: cutting the solid optical glue into four strip-shaped glue blocks; connecting the four strip-shaped glue blocks end to end into a ring shape, preferably a rectangular ring shape, but not limited to this; and cutting the ring shape
  • the strip-shaped adhesive block is attached to the upper surface of the adhesive layer of the first frame sticker.
  • a die cutting method or a laser cutting method can be used to cut a solid optical glue into a narrow strip-shaped glue block, which is beneficial to realize a narrow frame design.
  • the cover plate 25 and the touch panel 23 can be closely adhered when the cover plate 25 and the touch panel 23 are adhered by frame adhesion technology.
  • the shape of the first frame sticker adhesive layer 241 is preferably a ring shape.
  • the first frame sticker adhesive layer 241 and the second frame sticker adhesive layer 242 have the same shape so that when the vacuum frame is attached, the cover plate 25 and the touch panel 23 can be closely attached. Put together, while avoiding the phenomenon of crooked or falling off of the second frame sticker adhesive layer 242 during the attaching process.
  • step 51) further includes: feeding the cover plate, the touch panel, and the display panel after the adhesive layer is attached to a vacuum device; in a sealed environment, using a vacuum pump to The vacuum device is evacuated; and a heating module in the vacuum device is used to heat the cover plate, the touch panel, and the display panel after the glue layer is attached, so that the strip-shaped glue block melt.
  • the strip-shaped rubber block will melt when heated to 60°C to 80°C.
  • the strip-shaped rubber block will melt and level under the dual action of heating and pressure, and adhere to the first frame.
  • the sub-adhesive layers 241 are mixed together so that the edge of the touch panel 23 and the edge of the cover plate 25 are closely attached.
  • the strip-shaped rubber block is melted to form a rectangular ring, and the middle of the rectangular ring is the first frame sticker adhesive layer 241 and the second frame sticker adhesive layer 242 after being melted and leveled.
  • the enclosed vacuum area makes the middle part between the touch panel 23 and the cover plate 25 closely fit under the action of atmospheric pressure, effectively ensuring the sensitivity of touch operation.
  • the touch display device prepared by the manufacturing method described in this application, during the panel bonding process, the display panel and the touch panel are bonded through liquid optical glue using full bonding technology, and the cover plate is then bonded through solid optical glue using frame bonding technology and touch
  • the control panel is bonded and formed into a vacuum cavity.
  • the cover plate, the touch panel, and the display panel are closely attached.
  • the surface of the touch area is relatively flat, and the sensitivity of touch operation is high.
  • the control experience is better, and the optical glue material is effectively saved, the production cost is reduced, and the problems of yellowing, bending of different expansion and contraction, and wrinkles in the visible area are avoided, and the product yield is improved.

Abstract

本申请揭露一种触控显示装置及其制作方法，在面板贴合过程中，显示面板与触控面板通过液态光学胶采用全贴技术贴合，盖板再通过固态光学胶采用框贴技术与触控面板贴合并形成真空腔，所形成的触控显示装置中盖板、触控面板以及显示面板之间紧密贴合，且有效节省了光学胶材料。

Description

触控显示装置及其制作方法
本申请要求于2019年10月12日提交中国专利局、申请号为201910968646.1、发明名称为“触控显示装置及其制作方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种触控显示装置及其制作方法。
 背景技术
触控面板(Touch Panel，简称TP)，又称触摸屏、触控屏，是一种形成在图像显示装置显示面上，利用人体或电容笔等导体进行指令输入的装置，可代替鼠标、键盘等外接输入装置以及机械式输入按键等输入设备，可有效简化电脑、手机、电子仪表、游戏设备等电子产品结构，具有非常广阔的应用前景。从技术原理来分，触控面板主要有电容式、电阻式、超声波式和红外式等。
红外式触控技术凭借准确的触控精度，以及相对来说低成本的优势，目前占领着触控的很大一部分市场。但是，红外式触控技术不适用于有强光的场合，当有阳光直射在触摸面上面时，以及当有粉尘，水滴等遮挡物时，会对触控的精度造成一定的影响。随着电容成本的逐渐降低，以及规格尺寸越来越大，其灵敏度高，抗干扰能力较强，使用场景广泛，对机器外观影响小等优点，电容式触控技术以其相对灵敏的触控体现，受到越来越多的用户使用和追捧。
 技术问题
请参阅图1，现有技术中触控显示装置的层状结构示意图。所述触控显示装置包括依次层叠设置的一显示面板(Display Panel)11、一触控面板（TP）13以及一玻璃盖板(Cover Glass，简称CG)15，相邻组件之间通过固态光学胶(Solid Optically Clear Adhesive，简称SOCA)19利用全贴技术进行贴合。
在商用显示领域，作为教育白板和高端会议机等大型显示设备，为方便操作和演示，非常需要大尺寸触控显示装置。而对于大尺寸触控显示装置，采用全贴技术贴合需要大量的固态光学胶，极大地提高了生产成本，且存在脱胶等不良现象；同时，由于相邻组件之间均通过固态光学胶采用全贴技术进行贴合方式，会有贴合黄化问题、涨缩不同的弯折问题、以及可视区褶皱问题等。
 技术解决方案
本申请的目的在于，针对现有技术存在的问题，提供一种触控显示装置及其制作方法，可以利用少量的光学胶采用真空贴合方式，使得盖板、触控面板以及显示面板之间紧密贴合，节省光学胶材料，提高产品良率。
为实现上述目的，本申请提供了一种触控显示装置的制作方法，包括如下步骤：提供一显示面板；将一全贴胶层覆盖于所述显示面板的上表面，其中，所述全贴胶层为液态光学胶；将一触控面板放置于所述显示面板的上表面，使得所述触控面板与所述显示面板中部相对设置，所述触控面板的下表面贴附至所述全贴胶层的上表面；将一第一框贴子胶层贴附于所述触控面板的上表面的边缘处，其中，所述第一框贴子胶层为液态胶；将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面，其中，所述条状胶块的宽度小于所述第一框贴子胶层的宽度；将一盖板放置于所述触控面板的上表面，使得所述盖板与所述触控面板中部相对设置，所述条状胶块的上表面贴附至所述盖板的下表面；在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化；以及在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层被固化，同时使得熔化后的所述条状胶块被固化成一第二框贴子胶层，并在所述第一框贴子胶层、所述第二框贴子胶层中部形成一真空腔。
为实现上述目的，本申请提供了一种触控显示装置，包括：一显示面板；一全贴胶层，覆盖所述显示面板的上表面；一触控面板，贴附于所述全贴胶层的上表面，其中，所述触控面板与所述显示面板中部相对设置；一框贴胶层，贴附于所述触控面板的上表面的边缘处；一真空腔，形成于所述框贴胶层的中部；以及一盖板，贴附于所述框贴胶层的上表面，且所述盖板与所述触控面板中部相对设置。
为实现上述目的，本申请还提供了一种触控显示装置的制作方法，包括如下步骤：提供一显示面板；将一全贴胶层覆盖于所述显示面板的上表面；将一触控面板放置于所述显示面板的上表面，使得所述触控面板与所述显示面板中部相对设置，所述触控面板的下表面贴附至所述全贴胶层的上表面；将一框贴胶层贴附于所述触控面板的上表面的边缘处；将一盖板放置于所述触控面板的上表面，使得所述盖板与所述触控面板中部相对设置，所述框贴胶层的上表面贴附至所述盖板的下表面；以及在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层以及所述框贴胶层被固化，并在所述框贴胶层中部形成一真空腔。
 有益效果
本申请在面板贴合过程中，显示面板与触控面板通过液态光学胶采用全贴技术贴合，盖板再通过固态光学胶采用框贴技术与触控面板贴合并形成真空腔，所形成的触控显示装置中盖板、触控面板以及显示面板之间紧密贴合，触控区域的表面平整性较好，触控操作的灵敏度较高，触控体验较好，且有效节省了光学胶材料，降低了生产成本，避免了贴合黄化、涨缩不同的弯折、可视区褶皱等问题，提高了产品良率。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1，现有技术中触控显示装置的层状结构示意图；
图2，本申请触控显示装置一实施例的层状结构示意图；
图3，本申请触控显示装置另一实施例的层状结构示意图；
图4，本申请触控显示装置的制作方法的流程图。
 本发明的实施方式
下面详细描述本申请的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
本申请的说明书和权利要求书以及附图中的术语“第一”“第二”“第三”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应当理解，这样描述的对象在适当情况下可以互换。此外，术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排它的包含。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“之上”或“之下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图2，本申请触控显示装置一实施例的层状结构示意图。在本实施例中，所述触控显示装置包括：一显示面板21、一触控面板23以及一盖板25；所述显示面板21与所述触控面板23之间通过一全贴胶层22贴合，所述盖板25再通过一框贴胶层24贴合在所述触控面板23上，且所述触控面板23与所述盖板25之间具有一真空腔26。
所述显示面板21可以为液晶显示面板(Liquid Crystal Display，简称LCD)、有机发光二极管显示面板(Organic Light Emitting Diode，简称OLED)，有源矩阵有机发光二极管显示面板(Active-Matrix Organic Light Emitting Diode，简称AMOLED)，量子点发光二级管显示面板(Quantum-Dot Light Emitting Diode，简称QLED)等。所述显示面板21用于为所述触控显示装置提供显示画面。
所述触控面板23贴附于所述显示面板21的上表面，且与所述显示面板21中部相对设置。进一步的实施例中，所述触控面板23与所述显示面板21的形状相同、尺寸相同，从而可以进一步有效地确保所述触控面板23的可操作区与所述显示面板21的显示区一致。
所述全贴胶层22覆盖所述显示面板21的上表面，所述触控面板23的下表面贴附于所述全贴胶层22的上表面，使得所述触控面板23与所述显示面板21贴合。
进一步的实施例中，所述全贴胶层22可以采用液态光学胶(Liquid Optical Clear Adhesive，简称LOCA)。LOCA是用于透明光学元件粘接的特种胶粘剂，具有无色透明，透光率98%以上，可确保精确的色彩和充分的显示亮度；以及粘接强度良好，可在常温或中温条件下固化，且具有固化收缩率小耐黄变等特点。由于所述全贴胶层22采用液态光学胶，且全面覆盖所述显示面板21的上表面，因此，所述触控面板23与所述显示面板21可以通过液态光学胶采用全贴技术贴合。采用全贴合技术的盖板组件，触控区域的表面平整性较好，触控操作的灵敏度也较高，触控体验也较好。
所述盖板25贴附于所述触控面板23的上表面，且所述盖板25与所述触控面板23中部相对设置。所述盖板25用于保护所述触控面板23以及所述显示面板21，用户可以直接在所述盖板25上进行触控操作。优选的，所述盖板25的表面积大于所述触控面板23的表面积，从而使得所述盖板25能全面覆盖所述触控面板23，使得用户在所述盖板25上进行的触控操作具有良好的灵敏度，且利于实现窄边框设计。所述盖板25优选为玻璃盖板。
所述框贴胶层24贴附于所述触控面板23的上表面的边缘处，所述盖板25贴附于所述框贴胶层24的上表面，使得所述盖板25与所述触控面板23贴合。所述真空腔26形成于所述框贴胶层24的中部。由于所述触控面板23的中部与所述盖板25的中部形成真空，在大气压的作用下彼此贴合，所述真空腔26占据的空间被压缩至极小，使得所述盖板25与所述触控面板23能紧密地贴合在一起，因此，用户在全面覆盖所述触控面板23的所述盖板25上的操作具有良好的灵敏度。
进一步的实施例中，所述框贴胶层24可以采用固态光学胶(Solid Optically Clear Adhesive，简称SOCA)，固态光学胶在加热条件下可熔化，在UV光照条件下可固化。由于所述框贴胶层24采用固态光学胶，且贴附于所述触控面板23的上表面的边缘处，因此，所述盖板25与所述触控面板23可以通过固态光学胶采用框贴技术贴合。由于全贴技术中需采用大量的光学胶，极大地提高了面板制造成本，因此所述盖板25与所述触控面板23之间采用框贴技术，以有效节省光学胶材料。
进一步的实施例中，所述框贴胶层24包括：一第一框贴子胶层241以及一第二框贴子胶层242。所述第一框贴子胶层241贴附于所述触控面板23的上表面的边缘处；所述第二框贴子胶层242贴附于所述第一框贴子胶层241的上表面；所述盖板25贴附于所述第二框贴子胶层242的上表面，使得所述盖板25与所述触控面板23贴合。所述真空腔26形成于所述第一框贴子胶层241及所述第二框贴子胶层242的中部。
进一步的实施例中，所述第一框贴子胶层241采用具有较高的粘附性的胶粘剂，为所述第二框贴子胶层242起到预固定与定位的作用，避免所述第二框贴子胶层242被贴歪；所述第一框贴子胶层241可以为液态胶或者固态胶，只要能使所述第二框贴子胶层242紧密地贴附于所述第一框贴子胶层241，使所述第二框贴子胶层242与所述第一框贴子胶层241的位置保持一致即可。所述第二框贴子胶层242为固态光学胶，且所述第二框贴子胶层242的宽度小于或等于所述第一框贴子胶层241的宽度，便于所述第二框贴子胶层242贴附于所述第一框贴子胶层241的上表面，避免所述第二框贴子胶层242出现贴歪或脱落的现象。图2用于示意各组件的位置关系，实际上通过抽真空以及加热熔化并紫外固化胶层，所述盖板25的中部与所述触控面板23的中部在大气压的作用下彼此贴合，真空腔26占据的空间被压缩至极小，有效保证触控操作的灵敏度。
由于未被固化的光学胶具有极低的粘附性，尤其是在实现窄边框的显示面板设计时，如果直接光学胶贴附在所述触控面板23的上表面，光学胶很容易被贴歪，在光学胶固化过程中，还会使所述盖板25与所述触控面板23无法紧密贴合，进而影响显示面板的质量；被固化的光学胶具有优越的耐候性，尤其具有优异的抗展及抗爆性能，极大地改善了显示领域的安全性、可靠性、耐久性及美观性，具有高适光率、高粘接强度、低雾度、低收缩率和耐黄变等特点，主要适用于中大尺寸电脑、液晶显示、一体机等全贴合领域。因此，通过在所述触控面板23的上表面预先贴附一层高粘附性的所述第一框贴子胶层241，防止较窄的固态光学胶材质的所述第二框贴子胶层242在进行对位贴附时被贴歪或者脱落，避免了安全隐患、对位不精确的问题。
进一步的实施例中，所述第二框贴子胶层242的形状为环状，从而使得所述盖板25与所述触控面板23采用框贴技术贴合时，可以紧密贴合。由于所述第二框贴子胶层242的形状为环状，因而，所述第一框贴子胶层241的形状优选为环状。所述第一框贴子胶层241与所述第二框贴子胶层242的形状一致是为了在真空框贴贴合时，所述盖板25与所述触控面板23能紧密地贴合在一起，同时避免所述第二框贴子胶层242在贴附过程中出现贴歪或脱落的现象。
本申请提供的触控显示装置，在面板贴合过程中，显示面板与触控面板通过液态光学胶采用全贴技术贴合，盖板再通过固态光学胶采用框贴技术与触控面板贴合并形成真空腔，所形成的触控显示装置中盖板、触控面板以及显示面板之间紧密贴合，触控区域的表面平整性较好，触控操作的灵敏度较高，触控体验较好，且有效节省了光学胶材料，降低了生产成本，避免了贴合黄化、涨缩不同的弯折、可视区褶皱等问题，提高了产品良率。
请参阅图3，本申请触控显示装置另一实施例的层状结构示意图。与图2所示实施例的不同之处在于，在本实施例中，通过抽真空以及加热熔化并紫外固化胶层，所述框贴胶层24熔化流平后，所述盖板25的中部与所述触控面板23的中部在大气压的作用下彼此贴合，所述真空腔26占据的空间被压缩至极小，所述盖板25与所述触控面板23的紧密贴合，从而有效保证触控操作的灵敏度。
请参阅图4，本申请触控显示装置的制作方法的流程图。所述方法包括如下步骤：
S41：提供一显示面板。所述显示面板21用于为所述触控显示装置提供显示画面。
S42：将一全贴胶层覆盖于所述显示面板的上表面。
S43：将一触控面板放置于所述显示面板的上表面，使得所述触控面板与所述显示面板中部相对设置，所述触控面板的下表面贴附至所述全贴胶层的上表面。可以采用CCD对位方式或冶具辅助定位方式，使得所述触控面板23与所述显示面板21中部相对设置。进一步的实施例中，所述触控面板23与所述显示面板21的形状相同、尺寸相同，从而可以进一步有效地确保所述触控面板23的可操作区与所述显示面板21的显示区一致。
进一步的实施例中，所述全贴胶层22可以采用液态光学胶。由于所述全贴胶层22采用液态光学胶，且全面覆盖所述显示面板21的上表面，因此，所述触控面板23与所述显示面板21可以通过液态光学胶采用全贴技术贴合，贴合后触控区域的表面平整性较好，触控操作的灵敏度也较高，触控体验也较好。
S44：将一框贴胶层贴附于所述触控面板的上表面的边缘处。
S45：将一盖板放置于所述触控面板的上表面，使得所述盖板与所述触控面板中部相对设置，所述框贴胶层的上表面贴附至所述盖板的下表面。可以采用CCD对位方式或冶具辅助定位方式，使得所述盖板25与所述触控面板23中部相对设置。所述盖板25用于保护所述触控面板23以及所述显示面板21，用户可以直接在所述盖板25上进行触控操作。优选的，所述盖板25的表面积大于所述触控面板23的表面积，从而使得所述盖板25能全面覆盖所述触控面板23，使得用户在所述盖板21上进行的触控操作具有良好的灵敏度，且利于实现窄边框设计。所述盖板25优选为玻璃盖板。
进一步的实施例中，所述框贴胶层24可以采用固态光学胶。由于所述框贴胶层24采用固态光学胶，且贴附于所述触控面板23的上表面的边缘处，因此，所述盖板25与所述触控面板23可以通过固态光学胶采用框贴技术贴合。由于全贴技术中需采用大量的光学胶，极大地提高了面板制造成本，因此，所述盖板25与所述触控面板23之间采用框贴技术，以有效节省光学胶材料。
S46：在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层以及所述框贴胶层被固化，并在所述框贴胶层中部形成一真空腔。制备成的触控显示装置如图3所示。
可以将胶层贴附后的所述盖板25、所述触控面板23及所述显示面板21送进一真空装置，然后在密封环境下，利用一真空泵将所述真空装置抽真空，之后利用所述真空装置内的一加热模块(例如设于真空装置的设备内的加热管)，对胶层贴附后的所述盖板25、所述触控面板23及所述显示面板21进行加热处理，使得采用固态光学胶的所述框贴胶层24熔化。所述框贴胶层24在加热和加压的双重作用下会熔化流平，使得所述触控面板23的边缘处与所述盖板25的边缘处紧密贴合；而所述触控面板23与所述盖板25之间的中部为被所述框贴胶层24包围的真空区域，使得所述触控面板23与所述盖板25之间的中部在大气压的作用下紧密贴合，有效保证触控操作的灵敏度。
进一步的实施例中，步骤S44进一步包括：41）将一第一框贴子胶层覆盖于贴附于所述触控面板的上表面的边缘处；以及42）将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面。相应的，步骤S45进一步包括：51）在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化；以及52）采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层被固化，同时使得熔化后的所述条状胶块被固化成一第二框贴子胶层，并在所述第一框贴子胶层、所述第二框贴子胶层中部形成所述真空腔。
进一步的实施例中，所述第一框贴子胶层241采用具有较高的粘附性的胶粘剂，为所述第二框贴子胶层242起到预固定及定位的作用，避免所述第二框贴子胶层242被贴歪；所述第一框贴子胶层241可以为液态胶或者固态胶，只要能使所述第二框贴子胶层242紧密地贴附于所述第一框贴子胶层241，使所述第二框贴子胶层242与所述第一框贴子胶层241的位置保持一致即可。优选地，所述第一框贴子胶层241是首尾衔接，为后面工序做准备，但不限定于此，本领域的技术人员可以根据实际需求进行设置。
进一步的实施例中，所述第二框贴子胶层242为固态光学胶，且所述第二框贴子胶层242的宽度小于或等于所述第一框贴子胶层241的宽度，便于所述第二框贴子胶层242贴附于所述第一框贴子胶层241的上表面，避免所述第二框贴子胶层242出现贴歪或脱落的现象。步骤42）进一步包括：将所述固态光学胶裁切为四条条状胶块；将四条所述条状胶块首尾衔接围成环状，优选为矩环形，但不限于此；以及将环状的所述条状胶块贴附于所述第一框贴子胶层的上表面。可以采用刀模切割方式或激光切割方式将一固态光学胶裁切为较窄的条状胶块，利于实现窄边框设计。
由于所述第二框贴子胶层242的形状为环状，从而使得所述盖板25与所述触控面板23采用框贴技术贴合时，可以紧密贴合。所述第一框贴子胶层241的形状优选为环状。所述第一框贴子胶层241与所述第二框贴子胶层242的形状一致是为了在真空框贴贴合时，所述盖板25与所述触控面板23能紧密地贴合在一起，同时避免所述第二框贴子胶层242在贴附过程中出现贴歪或脱落的现象。
进一步的实施例中，步骤51）进一步包括：将胶层贴附后的所述盖板、所述触控面板及所述显示面板送进一起真空装置；在密封环境下，利用一真空泵将所述真空装置抽真空；以及利用所述真空装置内的一加热模块对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化。在真空环境下，所述条状胶块被加热至60℃～80℃就会熔化，所述条状胶块在加热和加压的双重作用下会熔化流平，与所述第一框贴子胶层241混合在一起，使得所述触控面板23的边缘处与所述盖板25的边缘处紧密贴合。本实施例中，所述条状胶块被熔化后形成一个矩形环，矩形环中部为被所述第一框贴子胶层241及熔化流平后的所述第二框贴子胶层242包围的真空区域，使得所述触控面板23与所述盖板25之间的中部在大气压的作用下紧密贴合，有效保证触控操作的灵敏度。
本申请所述制作方法制备的触控显示装置，在面板贴合过程中，显示面板与触控面板通过液态光学胶采用全贴技术贴合，盖板再通过固态光学胶采用框贴技术与触控面板贴合并形成真空腔，所形成的触控显示装置中盖板、触控面板以及显示面板之间紧密贴合，触控区域的表面平整性较好，触控操作的灵敏度较高，触控体验较好，且有效节省了光学胶材料，降低了生产成本，避免了贴合黄化、涨缩不同的弯折、可视区褶皱等问题，提高了产品良率。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (18)

  1. 一种触控显示装置的制作方法，其中，包括如下步骤：
    提供一显示面板；
    将一全贴胶层覆盖于所述显示面板的上表面，并且其中，所述全贴胶层为液态光学胶；
    将一触控面板放置于所述显示面板的上表面，使得所述触控面板与所述显示面板中部相对设置，所述触控面板的下表面贴附至所述全贴胶层的上表面；
    将一第一框贴子胶层贴附于所述触控面板的上表面的边缘处，并且其中，所述第一框贴子胶层为液态胶；
    将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面，并且其中，所述条状胶块的宽度小于所述第一框贴子胶层的宽度；
    将一盖板放置于所述触控面板的上表面，使得所述盖板与所述触控面板中部相对设置，所述条状胶块的上表面贴附至所述盖板的下表面；
    在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化；以及
    在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层被固化，同时使得熔化后的所述条状胶块被固化成一第二框贴子胶层，并在所述第一框贴子胶层、所述第二框贴子胶层中部形成一真空腔。
  2. 如权利要求1所述的制作方法，其中，所述触控面板与所述显示面板通过所述液态光学胶采用全贴技术贴合。
  3. 如权利要求1所述的制作方法，其中，所述的将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面的步骤进一步包括：
    将所述固态光学胶裁切为四条条状胶块；
    将四条所述条状胶块首尾衔接围成环状；以及
    将环状的所述条状胶块贴附于所述第一框贴子胶层的上表面。
  4. 如权利要求1所述的制作方法，其中，所述的在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化的步骤进一步包括：
    将胶层贴附后的所述盖板、所述触控面板及所述显示面板送进一真空装置；
    在密封环境下，利用一真空泵将所述真空装置抽真空；以及
    利用所述真空装置内的一加热模块对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化。
  5. 如权利要求1所述的制作方法，其中，所述第二框贴子胶层的宽度小于或等于所述第一框贴子胶层的宽度。
  6. 如权利要求1所述的制作方法，其中，所述触控面板的形状与所述显示面板的形状相同；所述触控面板的尺寸与所述显示面板的尺寸相同。
  7. 一种触控显示装置，其中，包括：
    一显示面板；
    一全贴胶层，覆盖所述显示面板的上表面；
    一触控面板，贴附于所述全贴胶层的上表面，其中，所述触控面板与所述显示面板中部相对设置；
    一框贴胶层，贴附于所述触控面板的上表面的边缘处；
    一真空腔，形成于所述框贴胶层的中部；以及
    一盖板，贴附于所述框贴胶层的上表面，且所述盖板与所述触控面板中部相对设置。
  8. 如权利要求7所述的触控显示装置，其中，
    所述全贴胶层为液态光学胶，所述触控面板与所述显示面板通过所述液态光学胶采用全贴技术贴合；
    所述框贴胶层为固态光学胶，所述盖板与所述触控面板通过所述固态光学胶采用框贴技术贴合。
  9. 如权利要求7所述的触控显示装置，其中，所述框贴胶层包括：
    一第一框贴子胶层，贴附于所述触控面板的上表面的边缘处；以及
    一第二框贴子胶层，贴附于所述第一框贴子胶层的上表面；
    其中，所述真空腔形成于所述第一框贴子胶层及所述第二框贴子胶层的中部。
  10. 如权利要求9所述的触控显示装置，其中，
    所述第一框贴子胶层为液态胶或者固态胶；
    所述第二框贴子胶层为固态光学胶，且所述第二框贴子胶层的宽度小于或等于所述第一框贴子胶层的宽度。
  11. 如权利要求9所述的触控显示装置，其中，所述第二框贴子胶层的形状为环状。
  12. 如权利要求7所述的触控显示装置，其中，所述触控面板的形状与所述显示面板的形状相同；所述触控面板的尺寸与所述显示面板的尺寸相同。
  13. 一种触控显示装置的制作方法，其中，包括如下步骤：
    提供一显示面板；
    将一全贴胶层覆盖于所述显示面板的上表面；
    将一触控面板放置于所述显示面板的上表面，使得所述触控面板与所述显示面板中部相对设置，所述触控面板的下表面贴附至所述全贴胶层的上表面；
    将一框贴胶层贴附于所述触控面板的上表面的边缘处；
    将一盖板放置于所述触控面板的上表面，使得所述盖板与所述触控面板中部相对设置，所述框贴胶层的上表面贴附至所述盖板的下表面；以及
    在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层以及所述框贴胶层被固化，并在所述框贴胶层中部形成一真空腔。
  14. 如权利要求13所述的制作方法，其中，
    所述全贴胶层为液态光学胶，所述触控面板与所述显示面板通过所述液态光学胶采用全贴技术贴合；
    所述框贴胶层为固态光学胶，所述盖板与所述触控面板通过所述固态光学胶采用框贴技术贴合。
  15. 如权利要求13所述的制作方法，其中，
    所述的将一框贴胶层贴附于所述触控面板的上表面的边缘处的步骤进一步包括：将一第一框贴子胶层贴附于所述触控面板的上表面的边缘处；以及将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面；
    所述的在真空环境下，采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层以及所述框贴胶层被固化，并在所述框贴胶层中部形成一真空腔的步骤进一步包括：在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化；以及采用紫外线照射胶层贴附后的所述盖板、所述触控面板及所述显示面板，使得所述全贴胶层被固化，同时使得熔化后的所述条状胶块被固化成一第二框贴子胶层，并在所述第一框贴子胶层、所述第二框贴子胶层中部形成所述真空腔。
  16. 如权利要求15所述的制作方法，其中，所述的将一固态光学胶裁切为条状胶块，贴附于所述第一框贴子胶层的上表面的步骤进一步包括：
    将所述固态光学胶裁切为四条条状胶块；
    将四条所述条状胶块首尾衔接围成环状；以及
    将环状的所述条状胶块贴附于所述第一框贴子胶层的上表面。
  17. 如权利要求15所述的制作方法，其中，所述的在真空环境下，对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化的步骤进一步包括：
    将胶层贴附后的所述盖板、所述触控面板及所述显示面板送进一真空装置；
    在密封环境下，利用一真空泵将所述真空装置抽真空；以及
    利用所述真空装置内的一加热模块对胶层贴附后的所述盖板、所述触控面板及所述显示面板进行加热处理，使得所述条状胶块熔化。
  18. 如权利要求15所述的制作方法，其中，所述第一框贴子胶层为液态胶或者固态胶；所述第二框贴子胶层的宽度小于或等于所述第一框贴子胶层的宽度。
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CN111580294A (zh) * 2020-05-07 2020-08-25 深圳市华星光电半导体显示技术有限公司 显示面板及其制备方法
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CN112255845B (zh) * 2020-11-04 2023-05-30 宁波视睿迪光电有限公司 一种显示装置及其制备方法
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