WO2010106999A1 - Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using the same - Google Patents
Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using the same Download PDFInfo
- Publication number
- WO2010106999A1 WO2010106999A1 PCT/JP2010/054353 JP2010054353W WO2010106999A1 WO 2010106999 A1 WO2010106999 A1 WO 2010106999A1 JP 2010054353 W JP2010054353 W JP 2010054353W WO 2010106999 A1 WO2010106999 A1 WO 2010106999A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- display device
- layer
- assembling
- light shielding
- Prior art date
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Images
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- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
-
- 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
- B32B2405/00—Adhesive articles, e.g. adhesive tapes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
Definitions
- the present invention relates to a display device assembly tape substrate, a display device assembly pressure-sensitive adhesive sheet using the same, and a display module unit.
- liquid crystal display devices are often used as display devices for electronic devices such as mobile phones and electronic notebooks.
- a liquid crystal display device used in such a small electronic device a sidelight type backlight type liquid crystal display device is employed.
- the above-mentioned sidelight type backlight type liquid crystal display device is generally arranged in a synthetic resin backlight casing after optical films such as a reflection sheet, a light guide plate, a diffusion sheet, and a prism sheet are laminated.
- a liquid crystal display panel is laminated and integrated on the laminated optical film via a display device assembly tape base material, and a lamp reflector is provided on the side of the light guide plate to provide an LED (Light Emitting Diode). ) Etc. are disposed.
- the tape base material for assembling the display device is a liquid crystal display panel that reflects light from the light source and has a light shielding property for preventing deterioration of the appearance of the liquid crystal display surface due to light entering the outer peripheral portion of the liquid crystal display panel. It is necessary to have both light reflectivity for efficiently guiding light.
- Patent Document 1 discloses (a) a combination of light reflectivity and light shielding properties used by adhering between an LCD panel of an LCD module and a backlight housing. And (b) a support formed by laminating a light reflection layer and a light shielding layer, and an adhesive layer provided on at least one surface of the support, and (c) the light reflection
- An adhesive tape comprising a biaxially stretched white resin film in which a layer is kneaded with a white colorant having a film thickness of 10 to 30 ⁇ m and a tensile strength of 10.0 N / 10 mm or more, and has a total thickness of 20 to 100 ⁇ m. It is disclosed.
- the light shielding layer of the adhesive tape is formed by applying black ink on a biaxially stretched white resin film and drying, and it is described that it is preferable to laminate two to four layers to prevent pinholes. (Paragraph number [0034]).
- black ink is applied on the white resin film and dried, and then black ink is applied on the black ink coating and dried.
- the black ink is applied on the white resin film and then dried, the black ink applied on the white resin film is completely dried before the next black ink is applied. Since doing so reduces the production efficiency, before the black ink already applied onto the white resin film is completely dried, the next black ink is applied onto the coating film.
- black ink contains inorganic particles such as silicon particles as an antiblocking agent, and it is considered that these inorganic particles may cause pinholes in the light shielding layer.
- inorganic particles such as silicon particles as an antiblocking agent
- the black ink applied on the white resin film is not completely dried and the next black ink is applied repeatedly, the inorganic particles contained in the black ink are overcoated. Crossing in the thickness direction through a plurality of coating layers that are not completely dried, and as a result, even if a plurality of light shielding layers are stacked, a pinhole is formed across the light shielding layer in the thickness direction
- the thinner the light shielding layer the greater the thickness of the adhesive tape. As a result, the thickness of the display device of the electronic device is reduced, and the desire to reduce the thickness of the display device of the electronic device is impaired.
- the conductivity of the light shielding layer rapidly increases when the thickness of the light shielding layer exceeds a certain thickness. As a result, it has been pointed out that a current flows through the light shielding layer, and this current causes a malfunction of the control device of the display panel of the display device.
- the present invention has excellent light-shielding properties and light-reflecting properties, and the display panel control device does not malfunction due to the current flowing in the light-shielding layer, and can reliably maintain the display performance of the display panel.
- a display device assembly tape substrate a display device assembly pressure-sensitive adhesive sheet using the display device assembly tape substrate, and a display module unit.
- the tape substrate for assembling the display device of the present invention has a light shielding layer having a thickness of 1 to 5 ⁇ m laminated and integrated on both surfaces of a substrate film, containing carbon black produced by a furnace method as a black colorant.
- the light reflecting layer is laminated and integrated on any one of the light shielding layers.
- the display module unit includes a frame-like backlight housing having a panel mounting step formed on the inner peripheral surface, and a display device assembly mounted on the panel mounting step.
- a pressure-sensitive adhesive sheet comprising a base film, a light-shielding layer having a thickness of 1 to 5 ⁇ m containing carbon black laminated and integrated on both surfaces of the base film and manufactured by a furnace method as a black colorant, and the light-shielding layer
- a display device assembly pressure-sensitive adhesive sheet including a light reflecting layer laminated and integrated on any one of the light-shielding layers, a display panel disposed on the display device assembly pressure-sensitive adhesive sheet, and the backlight housing. And a plurality of optical films disposed in a laminated state in the body.
- the light shielding layer is laminated and integrated on both surfaces of the substrate film, and the light reflecting layer is laminated and integrated on one of the light shielding layers.
- the light shielding layer is formed separately through the base film, and even if pinholes are formed in each light shielding layer, the pinholes are extremely small diameter holes, so the pinholes formed in each light shielding layer There is almost no possibility of overlapping each other, and light can be reliably blocked by the two light shielding layers.
- the light-shielding layer contains carbon black produced by the furnace method as a black colorant, that is, furnace black, and the light-shielding layer has excellent light-shielding properties and is incident on the tape substrate for assembling the display device. The light can be blocked more reliably.
- the thickness of the light shielding layer is 1 to 5 ⁇ m. It is possible to prevent a current from flowing through the light shielding layer by setting the value to 500 M ⁇ or more. Therefore, it is possible to prevent malfunction of the display panel control device due to current flowing through the light shielding layer.
- the tape base material A for assembling the display device of the present invention has the light shielding layers 2 and 2 laminated and integrated on both surfaces of the base film 1 and the light reflecting layer 3 laminated and integrated on one of the light shielding layers 2. It is characterized by that.
- the shape of the tape base material A for assembling the display device is not particularly limited, but in the following description, a case where it is formed in a frame shape will be described as an example.
- the synthetic resin constituting the base film 1 of the tape base material A for assembling the display device is not particularly limited as long as it is conventionally used as a tape base material.
- Polyester film and polypropylene film are preferable, and polyethylene terephthalate film is more preferable.
- the thickness of the base film 1 When the thickness of the base film 1 is large, the thickness of the obtained tape base material for assembling the display device becomes thick, so that the thickness is preferably 10 ⁇ m or less. When the thickness of the base film 1 is thin, the strength of the display device assembly tape base material is reduced, and the display device assembly tape base material is likely to wrinkle during use. 1 ⁇ m or more is preferable, 3 ⁇ m or more is more preferable, and 4 ⁇ m or more is particularly preferable.
- the thickness of the base film 1 cut disconnects the tape base material for a display apparatus assembly in the thickness direction in arbitrary places, observes the cut surface with an electron microscope, and is the base material film of arbitrary 5 places. The arithmetic average value of thickness is used.
- the base film 1 does not contain a powdered colored pigment, and by not containing the powdered colored pigment in this way, the base film can be made thin, As a result, it is possible to reduce the thickness of the display device assembling tape base material.
- the powdered colored pigment is not particularly limited as long as it is powdered at room temperature, white pigments such as titanium dioxide, barium sulfate, zinc white, lead white, carbon black, acetylene black, pine smoke, Examples thereof include black pigments such as graphite and other various pigments.
- light shielding layers 2 are laminated and integrated on both surfaces of the base film 1.
- the light shielding layer 2 is carbon black produced by a furnace method (hereinafter referred to as “furnace black”) as a black colorant in order to block light and prevent light from being transmitted to the base film 1 side through the light shielding layer 2. Is included).
- the light shielding layer 2 can impart excellent light shielding properties to the light shielding layer 2 while suppressing the conductivity of the light shielding layer 2 by containing carbon black produced by the furnace method as a black colorant.
- carbon black produced by the furnace method as a black colorant.
- it prevents light leakage from the backlight housing and prevents malfunction of the display panel control device, thereby improving the display performance of the display panel. It can maintain reliably and the outstanding visibility and display property of a display apparatus can be achieved.
- the average particle size of the black colorant (furnace black) is small, the black ink may not be easily handled, and if the average particle size is large, the surface roughness of the light-shielding layer becomes large and it is integrated with the adhesive layer. Is preferably from 0.01 to 0.5 ⁇ m.
- the average particle diameter of a black coloring agent says the calculated average diameter calculated
- the light-shielding layer 2 may be formed by applying and drying black ink containing furnace black as a black colorant on the base film 1. Under the present circumstances, it is preferable to perform the process of apply
- the pinhole formed in the light shielding base layer can be surely shielded by another light shielding base layer, and the light shielding property of the light shielding layer 2 is more reliable. can do.
- general-purpose means such as gravure printing, flexographic printing, and offset printing may be used.
- the compatibility between the base film and the black ink is low, that is, the wettability (affinity) of the base film is low.
- the black ink is not uniformly applied onto the base film 1, and in particular, the black ink is thinly applied without the black ink being uniformly applied. If carbon black is present in the part, the binder is not supplied smoothly around the carbon black. As a result, a fine part where black ink is not partially applied is generated. Is assumed to be a pinhole.
- corona discharge treatment has been applied to both sides of the base film 1 in advance to improve the wettability of both sides of the base film 1.
- FIG. The corona discharge treatment is preferably performed so that the surface tension of the base film 1 is 40 mN / m or more.
- the black ink containing a black colorant preferably contains a black colorant (furnace black), a binder, and a solvent.
- the binder is not particularly limited, and those conventionally used in inks are used, and examples include polyurethane resins, phenol resins, epoxy resins, urea melamine resins, polymethyl methacrylate, and the like. A polyurethane resin is preferred.
- the binder is preferably one having a content of halogen elements such as chlorine, bromine, fluorine and iodine of 50 ppm or less. This is because if the binder contains a large amount of halogen element, a gas caused by the halogen element is generated during use of the display device, and this gas causes the display performance of the display device to deteriorate. Alternatively, harmful gas may be generated during incineration.
- halogen elements such as chlorine, bromine, fluorine and iodine
- the amount of halogen element in the binder can be measured by emission spectroscopic analysis.
- the emission spectroscopic analysis method is a measurement method in which atoms are excited by a plasma light source to emit light, the emitted light is dispersed by a diffraction grating or the like, and a so-called atomic spectrum is obtained to identify a contained element.
- a measuring device commercially available from Shimadzu Corporation under the trade name “PDA series” can be used.
- the solvent is not particularly limited and may be appropriately selected according to the type of binder.
- the content of the black colorant (furnace black) in the black ink is large, the electrical insulation when used in the display device may be lowered. Therefore, it is preferably less than 12% by weight in the ink. .
- Inks containing a black colorant are commercially available from Dainippon Ink & Chemicals, Inc. under the trade name “Univia A-300” and from Teikoku Ink Manufacturing Co., Ltd. under the trade name “EGS-911 Black”. Yes.
- the light shielding layer preferably has an L * representing 25 ⁇ 10 in the L * a * b * color system specified by JIS Z8729.
- the content of the black colorant (furnace black) in the light-shielding layer 2 is small, the light-shielding property of the light-shielding layer is lowered, and when used to integrate the display panel and the backlight housing, the backlight Light leakage from the housing may occur, and the visibility of the display device may be reduced. In many cases, the electrical insulation when used in the display device may be reduced, so 15 to 70% by weight is preferable. .
- the thickness of the light shielding layer 2 is limited to 1 to 5 ⁇ m, and preferably 2 to 4 ⁇ m.
- the thickness of the light shielding layer is obtained by cutting the tape base material for assembling the display device at an arbitrary position in the thickness direction, observing the cut surface with an electron microscope, and measuring the thickness of the light shielding layer 2 at any five positions. Use the arithmetic mean value.
- the total thickness of the light shielding layers 2 and 2 laminated and integrated on both surfaces of the base film 1 is thin, the light shielding performance may be deteriorated. If it is thick, the conductivity of the light shielding layer is increased and the display panel is increased. 2 ⁇ m or more is preferable, 2 to 10 ⁇ m is more preferable, and 4 to 8 ⁇ m is more preferable.
- the light shielding layers 2 and 2 are laminated and integrated on both surfaces of the base film 1, and the pinhole formed in the light shielding layer 2 laminated and integrated on one surface of the base film 1, and the base material
- the pin hole formed in the light-shielding layer 2 laminated and integrated on the other surface of the film 1 has a very small diameter and is very unlikely to overlap.
- A has excellent light shielding properties.
- the light shielding layers 2 and 2 are formed separately. As described above, even if a pinhole is formed in one of the light shielding layers 2, the light transmitted through the pinhole is transmitted through the other light shielding layer 2. Since blocking is performed, it is not necessary to increase the thickness of the light shielding layer 2 more than necessary in order to prevent the formation of pinholes. Therefore, the thickness of the display device assembly tape substrate A can be reduced, and the thickness accuracy of each of the light shielding layers 2 and 2 can be improved, and the quality of the display device assembly tape substrate A is made uniform. be able to.
- the thickness of the light shielding layer 2 can be reduced, even if a conductive colored pigment is contained in the light shielding layer 2, an increase in the conductivity of the light shielding layer 2 due to the conductive colored pigment is prevented. It is possible to prevent electricity from flowing through the light shielding layer 2. As a result, the display panel control device does not malfunction due to the current flowing through the light shielding layer 2, and the display performance of the display panel can be reliably maintained.
- the light shielding layer 2 is usually formed by applying and drying black ink on the surface of the base film 1, but when applying the black ink on the surface of the base film 1, The black ink applied on the film may be partially repelled, and the black ink is insufficiently applied on the base film in this portion, and pinholes are formed in the light shielding layer. Therefore, the pinhole formed in the lower light-shielding layer is concealed by the light-shielding layer formed on the upper side by repeating the process of applying the black ink on the base film and drying to form the light-shielding layer multiple times. It is possible to do.
- the black ink for forming the upper light-shielding layer is highly likely to be repelled even if black ink is applied again to the part where the black ink has been repelled when forming the lower light-shielding layer.
- pinholes are also formed in the same part of the light shielding layer and the pinholes cannot be hidden.
- the tape substrate A for assembling the display device of the present invention since the light shielding layers 2 and 2 are separately formed on both surfaces of the substrate film 1, black ink is separately applied to each of both surfaces of the substrate film. ing. Therefore, in the black ink applied on both surfaces of the base film, the possibility that the portions repelled by the base film are the same is very low. Therefore, the position where the pinhole is formed in one light-shielding layer 2 and the position where the pinhole is formed in the other light-shielding layer 2 hardly overlap each other, and the pinhole formed in one light-shielding layer 2 Is reliably hidden by the pinhole formed in the other light shielding layer 2. Therefore, the tape base material A for assembling the display device of the present invention has excellent light shielding properties.
- the light shielding layers 2 and 2 laminated and integrated on both surfaces of the base film 1 of the tape base material A for assembling the display device of the present invention do not need to have the same configuration. Different configurations may be adopted.
- the light reflecting layer 3 is laminated and integrated on one of the light shielding layers 2 and 2 of the tape base material A for assembling the display device.
- the display device assembly tape base material A has the light reflecting layer 3, for example, when used to integrate the display panel and the backlight housing, the light from the backlight housing is reflected later. Light can be efficiently guided to the display panel by reflecting in the direction of the plate 10.
- the light reflecting layer 3 only needs to reflect light, and preferably contains a white colorant.
- a white colorant is not particularly limited, and examples thereof include titanium dioxide, barium sulfate, zinc white, lead white and the like, and titanium dioxide is preferable.
- the light reflecting layer 3 may be formed by applying and drying an ink capable of forming the light reflecting layer 3 on the light shielding layer 2, and preferably applying and drying a white ink containing a white colorant. What is necessary is just to form. At this time, it is preferable to perform the step of applying and drying the ink a plurality of times.
- general-purpose means such as gravure printing, flexographic printing, and offset printing may be used.
- the white ink containing a white colorant preferably contains a white colorant, a binder, and a solvent. Since the binder and the solvent are the same as the black colorant, description thereof is omitted.
- the content of the white colorant in the white ink if the amount is small, the reflectance of the light reflecting layer decreases, and the thickness of the light reflecting layer cannot be reduced while maintaining sufficient light reflectance.
- the content is preferably 10 to 40% by weight, more preferably 15 to 30% by weight.
- white ink for example, white ink marketed by Dainippon Ink and Chemicals, Inc. under the trade name “Panacia CVL-SP709 White”, and commercially available from Teikoku Ink, Inc. under the trade name “EGS611 White”. White ink can be used.
- the reflectance of the light reflecting layer is lowered, and the thickness of the light reflecting layer cannot be reduced while maintaining sufficient light reflectance. If the amount is large, the surface roughness of the light reflection layer increases, and when the pressure-sensitive adhesive layer is formed on the light reflection layer, the adhesion between the light reflection layer and the pressure-sensitive adhesive layer decreases, and the light reflection layer and Since there is a possibility of delamination between the pressure-sensitive adhesive layer, 20 to 85% by weight is preferable.
- L * representing lightness in the L * a * b * color system specified by JIS Z8729 is larger than 85.
- the thickness of the light reflecting layer 3 is thin, the light shielding layer is seen through the light reflecting layer, the color of the light reflecting layer is apparently gray, and light transmitted through the light reflecting layer is absorbed by the light shielding layer. As a result, there is a possibility that the light reflection performance of the light reflecting layer 3 may be lowered. If the thickness is large, the thickness of the entire tape base material for assembling the display device is increased, so 2 to 15 ⁇ m is preferable. In addition, the thickness of the light reflection layer 3 is obtained by cutting the tape base material for assembling the display device at an arbitrary position in the thickness direction, and observing the cut surface with an electron microscope. It is set as the arithmetic average value of thickness.
- the light shielding layer 2 is laminated and integrated on both surfaces of the base film 1, and the light reflecting layer 3 is provided on one of the light shielding layers 2, whereby the tape base material A for assembling the display device.
- the adhesive sheet B for assembling the display device is formed by laminating and integrating the adhesive layer 4 on at least one surface of the tape base material A for assembling the display device.
- the display device assembly pressure-sensitive adhesive sheet B may be formed by laminating and integrating the pressure-sensitive adhesive layers 4 and 4 on both surfaces of the display device assembly tape base material A.
- the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 4 is not particularly limited, and examples thereof include acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives.
- both the pressure-sensitive adhesive layers 4 and 4 may be the same or different.
- acrylic pressure-sensitive adhesive examples include homopolymers of (meth) acrylic acid alkyl esters having 1 to 18 carbon atoms in the alkyl group, (meth) acrylic acid alkyl esters having 1 to 18 carbon atoms in the alkyl group, and other functionalities. It preferably contains 50% by weight or more of a copolymer with a copolymerizable monomer such as a polymerizable monomer.
- (meth) acryl means acryl or methacryl.
- the pressure-sensitive adhesive property of the acrylic pressure-sensitive adhesive may be lowered. % By weight or more is preferable, and 60% by weight or more is more preferable.
- the (meth) acrylic acid alkyl ester is not particularly limited.
- examples of the functional monomer include a monomer having a hydroxyl group, a monomer having a carboxyl group, a monomer having an amide group, and a monomer having an amino group.
- examples of the monomer having a hydroxyl group include hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate.
- Examples of the monomer having a carboxyl group include ⁇ , ⁇ -unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; monoalkyl maleates such as butyl maleate; and unsaturated monomers such as maleic acid, fumaric acid, and itaconic acid.
- Examples thereof include dibasic acid anhydrides such as saturated dibasic acid and maleic anhydride.
- monomers having an amide group include alkyl (meth) acrylamides such as (meth) acrylamide, dimethyl (meth) acrylamide, diethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, and N-ethoxymethyl (meth).
- alkyl (meth) acrylamides such as (meth) acrylamide, dimethyl (meth) acrylamide, diethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, and N-ethoxymethyl (meth).
- alkyl (meth) acrylamides such as (meth) acrylamide, dimethyl (meth) acrylamide, diethyl (meth) acrylamide, N-butoxymethyl (meth) acrylamide, and N-ethoxymethyl (meth).
- N-alkoxymethyl (meth) acrylamide such as acrylamide, diacetone (meth) acrylamide and the like can be mentioned.
- examples of the monomer having an amino group include dimethylaminoethyl (meth) acrylate.
- examples of other copolymerizable monomers include vinyl acetate, styrene, ⁇ -methylstyrene, vinyl chloride, acrylonitrile, ethylene, propylene, and the like.
- a tackifier, a crosslinking agent, etc. may be mix
- tackifiers include rosin resins, polyterpene resins, coumarone-indene resins, petroleum resins, terpene-phenol resins, and the like.
- the crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, an oxazoline crosslinking agent, an aziridine crosslinking agent, and a metal chelate crosslinking agent.
- the acrylic pressure-sensitive adhesive a (meth) acrylic acid ester resin having a weight average molecular weight of 500,000 to 1,000,000 measured as a polystyrene equivalent molecular weight by the GPC method, and a rosin ester resin having a hydroxyl value of 35 or more And a terpene phenol resin having a hydroxyl value of 35 or more and having a gel fraction of 10 to 40% by weight is preferred.
- the pressure-sensitive adhesive sheet for assembling the display device is preferable because sufficient pressure-sensitive adhesive force is exhibited even if the thickness of the pressure-sensitive adhesive layer is reduced to about 10 ⁇ m.
- the rubber adhesive examples include natural rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, polyisoprene, polybutene, polyisobutylene, and ethylene-vinyl acetate copolymer. What contains 50 weight% or more of a body is mentioned.
- a tackifier such as rosin resin, polyterpene resin, coumarone-indene resin, petroleum resin, terpene-phenol resin, and the like is added, and if necessary, liquid polybutene, Softeners such as mineral oil, liquid polyisoprene, and liquid polyacrylate are blended.
- a tackifier such as rosin resin, polyterpene resin, coumarone-indene resin, petroleum resin, terpene-phenol resin, and the like is added, and if necessary, liquid polybutene, Softeners such as mineral oil, liquid polyisoprene, and liquid polyacrylate are blended.
- the silicone-based pressure-sensitive adhesive include those containing 50% by weight or more of polydimethylsiloxane and the like.
- the pressure-sensitive adhesive layer 4 is preferably transparent, but the pressure-sensitive adhesive layer 4 laminated and integrated on the light reflecting layer 3 is white, and the pressure-sensitive adhesive layer 4 stacked and integrated on the light shielding layer 2 is black. May be colored.
- the solution containing the pressure-sensitive adhesive on the tape substrate A for display device assembly there is no particular limitation, and the solution containing the pressure-sensitive adhesive on the tape substrate A for display device assembly.
- the dispersion can be applied directly using a comma coater, top feed reverse coater, etc., and the solution or dispersion containing the adhesive can be applied directly to the release treatment surface of the release film as described above. After drying, the release film is overlaid on the display device assembly tape substrate A so that the adhesive layer faces the display device assembly tape substrate A, and the adhesive layer is assembled to the display device assembly.
- a method of transferring and laminating and integrating the tape base material A for use for use.
- the pressure-sensitive adhesive property of the pressure-sensitive adhesive layer may be lowered, and when it is thick, the thickness of the pressure-sensitive adhesive sheet for assembling the display device is increased.
- the display device assembly adhesive sheet B is formed in a rectangular frame shape, and a display panel 6 such as a liquid crystal display panel or an organic EL (electroluminescence) panel is disposed and integrated in a backlight housing 5 to form a display module unit C. Used to configure.
- a display panel 6 such as a liquid crystal display panel or an organic EL (electroluminescence) panel is disposed and integrated in a backlight housing 5 to form a display module unit C. Used to configure.
- the backlight housing 5 is formed in a rectangular frame shape made of synthetic resin, and a flat rectangular frame-like panel arrangement for mounting the display panel 6 on the upper end portion.
- the installation step 51 is formed in an open state on the upper end surface of the backlight housing 5, and a reflection plate disposing step 52 for disposing the reflection plate 10 is provided on the lower end surface at the lower end. It is formed in a planar rectangular frame shape in an open state.
- a flat rectangular display panel 6 having a size slightly smaller than the upper end opening of the backlight housing 5 is disposed on the panel placement step 51 of the backlight housing 5.
- a plurality of optical films are disposed in a stacked state.
- the light guide plate 7, the diffusion sheet 8, and one or a plurality of prism sheets 9, 9... For improving luminance are laminated in this order, and then the prism sheet 9 is formed.
- the prism sheet 9 is disposed in the backlight housing 5 so as to face the display panel 6 and to be substantially flush with the panel receiving surface 51a of the panel disposition step 51.
- optical films other than the above may be appropriately laminated.
- the reflector 10 is disposed and integrated with the reflector arrangement step 52 of the backlight casing 5, and an LED (not shown) is disposed in the backlight casing 5 as a light source. Has been.
- the display panel 6 and the prism sheet 9 facing the display panel 6 are integrated via a display device assembly pressure-sensitive adhesive sheet B.
- the display device assembly pressure-sensitive adhesive sheet B has a light-shielding layer 2 applied to the display panel 6 and light.
- the reflective layer 3 is disposed so as to face the prism sheet 9.
- the display device assembly pressure-sensitive adhesive sheet B is disposed on the panel receiving surface 51 a of the panel disposition step 51 of the backlight housing 5, and the panel disposition step of the backlight housing 5. Width dimension to reach from the inner peripheral edge of the panel receiving surface 51a of the portion 51 to the outer peripheral portion of the prism sheet 9 disposed in the opening surrounded by the panel receiving surface 51a of the panel mounting step 51.
- the panel receiving surface 51a and the prism sheet 9 of the step for disposing the panel of the backlight housing 5 and the display panel 6 are attached to the display device assembly adhesive on the entire periphery.
- the sheet B is bonded and integrated.
- the optical film facing the display panel 6 is described as being the prism sheet 9, but the optical film facing the display panel 6 is not necessarily a prism sheet, and may be another optical film.
- the display module unit C configured as described above is suitable for the thinning of small electronic devices such as mobile phones and electronic dictionaries since the display device assembly tape base material A is thinned.
- the display device assembly tape base material reflects the light from the light source with excellent light-shielding properties for preventing deterioration of the appearance of the display surface due to light entering the outer periphery of the display panel.
- the display module unit that exhibits excellent light reflectivity for efficiently guiding light to the display panel is thin and has excellent display performance.
- the display panel 6 is not adversely affected. The display performance of 6 is not impaired.
- Example 1 A colorless and transparent polyethylene terephthalate film (trade name “5AF53” manufactured by Toray Industries, Inc.) having a thickness of 4.5 ⁇ m was prepared as the transparent substrate film 1.
- the polyethylene terephthalate film did not contain any colored pigment.
- the corona discharge process was performed to both surfaces of the transparent base film 1, and the surface tension of both surfaces of the transparent ground film 1 was 50 mN / m.
- a urethane resin halogen element content: less than 50 ppm
- carbon black produced by a furnace method having an average particle size of 0.03 ⁇ m as a black colorant
- ethyl acetate, toluene and isopropyl alcohol A black ink made of black ink (carbon black: 10% by weight) consisting of 60 parts by weight of a solvent was prepared.
- Black ink was applied to one surface of the polyethylene terephthalate film 1 using a gravure printing method and dried to form a light-shielding base layer having a thickness of 1 ⁇ m.
- a gravure printing method By coating and drying the black ink on the light shielding base layer using a gravure printing method, another light shielding base layer having a thickness of 1 ⁇ m was laminated and integrated on the light shielding base layer.
- the procedure of applying and drying black ink on the light shielding base layer was repeated a total of three times to form four light shielding base layers and a light shielding layer 2 having a thickness of 4 ⁇ m, which were laminated and integrated with each other.
- the content of carbon black in each light shielding base layer was 25% by weight.
- a light shielding layer 2 having a thickness of 4 ⁇ m formed by laminating and integrating four light shielding base layers was formed in the same manner.
- the content of carbon black in each light shielding base layer was 25% by weight.
- Another white light reflection base layer having a thickness of 1.3 ⁇ m was laminated and integrated on the light reflection base layer by applying and drying the white ink on the light reflection base layer by using a gravure printing method.
- the procedure of applying and drying white ink on the light reflecting base layer was repeated a total of two times to form a light reflecting layer 3 having a thickness of 3.9 ⁇ m to form a tape substrate A for assembling a display device.
- the content rate of the titanium dioxide in each light reflection base layer was 50 weight%.
- an acrylic pressure-sensitive adhesive (trade name “SK1717” manufactured by Soken Chemical Co., Ltd.) is applied on the light shielding layer 2 and the light reflecting layer 3 laminated and integrated on the other surface of the polyethylene terephthalate film 1 and dried.
- a pressure-sensitive adhesive layer 4 or 4 having a thickness of 20 ⁇ m was formed on each of the light reflection layers 3 to produce a pressure-sensitive adhesive sheet B for assembling a display device shown in FIG.
- Example 2 A display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was produced in the same manner as in Example 1 except that the light-shielding layer 2 having a thickness of 1 ⁇ m consisting of a single light-shielding base layer was formed on both surfaces of the polyethylene terephthalate film 1. .
- Example 3 Applying black ink on the light-shielding base layer laminated and integrated on one surface of the polyethylene terephthalate film 1 and drying the total of one time instead of a total of three times, the light-shielding base layer is two layers, and the thickness formed by laminating and integrating each other is 2 ⁇ m 4 was produced in the same manner as in Example 1 except that the light shielding layer was formed.
- Example 4 Thickness obtained by laminating and integrating 5 layers of light-shielding base layers with a total of 4 times instead of a total of 3 times for applying black ink on the light-shielding base layers laminated and integrated on both surfaces of the polyethylene terephthalate film 1, respectively. 4 was produced in the same manner as in Example 1 except that a light-shielding layer having a thickness of 5 ⁇ m was formed.
- Example 5 Thickness obtained by laminating and integrating two light-shielding base layers, with black ink applied to the light-shielding base layer laminated and integrated on both surfaces of the polyethylene terephthalate film 1 and drying, with a total of once instead of three times. 4 was produced in the same manner as in Example 1 except that a light-shielding layer having a thickness of 2 ⁇ m was formed.
- the light-shielding base layer is formed of 8 layers, and the light-shielding layer 2 having a thickness of 8 ⁇ m is formed.
- the polyethylene terephthalate film 1 is formed on the other surface without forming the light-shielding layer.
- Example 2 A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 ⁇ m, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
- black ink was applied to one surface of the white resin film by gravure printing and dried to form a light-shielding base layer having a thickness of 1 ⁇ m.
- a light-shielding base layer having a thickness of 1 ⁇ m.
- another light shielding base layer having a thickness of 1 ⁇ m was laminated and integrated on the light shielding base layer.
- the procedure of applying and drying black ink on the light-shielding base layer is repeated a total of 7 times to form a light-shielding layer having a thickness of 8 ⁇ m formed by laminating and integrating the light-shielding base layers and forming a tape base material for assembling the display device. Formed.
- an acrylic pressure-sensitive adhesive was applied and dried to form a pressure-sensitive adhesive layer having a thickness of 1.5 ⁇ m to produce a pressure-sensitive adhesive sheet for assembling a display device.
- Example 3 The display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was prepared in the same manner as in Example 1 except that the light-shielding layer 2 having a thickness of 0.5 ⁇ m consisting of one light-shielding base layer was formed on each of both surfaces of the polyethylene terephthalate film 1. Manufactured.
- Example 4 Applying black ink on the light-shielding base layer formed on the other surface of the polyethylene terephthalate film and drying the black ink on the light-shielding base layer for a total of 5 times instead of a total of 6 times.
- a display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was produced in the same manner as in Example 1 except that was formed.
- Example 5 A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 ⁇ m, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
- Teflex trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 ⁇ m, total light transmittance: 30 to 40%
- black ink was applied to one surface of the white resin film by gravure printing and dried to form a light shielding layer composed of a light shielding base layer having a thickness of 1 ⁇ m.
- an acrylic pressure-sensitive adhesive (trade name “SK1717” manufactured by Soken Chemical Co., Ltd.) is applied on the other side of the white resin film and the light shielding layer, and dried.
- a 20 ⁇ m pressure-sensitive adhesive layer was formed to produce a pressure-sensitive adhesive sheet for assembling a display device.
- Example 6 A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 ⁇ m, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
- black ink was applied to one surface of the white resin film by gravure printing and dried to form a light-shielding base layer having a thickness of 1 ⁇ m.
- a light-shielding base layer having a thickness of 1 ⁇ m.
- another light shielding base layer having a thickness of 1 ⁇ m was laminated and integrated on the light shielding base layer.
- the procedure of applying and drying black ink on the light-shielding base layer is repeated 5 times in total, and 6 layers of light-shielding base layers and a light-shielding layer having a thickness of 6 ⁇ m are formed to form a tape substrate for assembling a display device. Formed.
- an acrylic pressure-sensitive adhesive (trade name “SK1717” manufactured by Soken Chemical Co., Ltd.) is applied on the other side of the white resin film and the light-shielding layer and dried.
- a 20 ⁇ m pressure-sensitive adhesive layer was formed to produce a pressure-sensitive adhesive sheet for assembling a display device.
- an acrylic adhesive (trade name “SK1717” manufactured by Soken Chemical Co., Ltd.) is applied to both sides of the transparent resin film and dried to form an adhesive layer having a thickness of 20 ⁇ m on each side of the transparent resin film.
- a pressure-sensitive adhesive sheet for assembling the apparatus was produced.
- the light-shielding base layer is formed of 10 layers, and the light-shielding layer 2 having a thickness of 10 ⁇ m is formed.
- the polyethylene terephthalate film 1 is formed on the other surface without forming the light-shielding layer.
- the light reflectance, lightness, light shielding property, conductivity of the light shielding layer and the number of pinholes of the obtained pressure-sensitive adhesive sheet for assembling the display device were measured in the following manner, and the results are shown in Table 1.
- Using the obtained adhesive sheet for assembling the display device, whether or not the electronic device operates normally was confirmed in the following manner, and the result is shown in Table 1.
- Light reflectance The total light reflectance at 500 nm was measured for the light reflecting layer of the pressure-sensitive adhesive sheet for assembling the display device according to JIS K7105. In Comparative Example 2, the light reflectance of the white resin film was measured.
- the total light transmittance based on JIS K7105 was measured about the light shielding layer of the adhesive sheet for a display apparatus assembly.
- test piece T Three flat square test pieces T each having a side of 50 mm were cut out from the display device assembly tape base material.
- two iron needles N 1 and N 2 were pierced into each test piece T so as to be parallel to each other with an interval W 1 of 10 mm.
- the two needles N 1 and N 2 were allowed to penetrate from the other surface side of the test piece T to the one surface side and then penetrated from the one surface side to the other surface side.
- the distance W 2 between the two points through which the needles N 1 and N 2 penetrate the test piece T was 10 mm.
- One side or the other side of the test piece corresponds to one side or the other side of the base film when the display device assembly tape base material is manufactured.
- the arithmetic average value of the resistance values of the test piece T was defined as the conductivity of the light shielding layer.
- a tape base material for assembling the display device was placed on the upper end opening of the cylindrical body so as to completely close the upper end opening.
- a light source (trade name “Dycrobeam 110V 65W beam angle 10 ° model number JDR110V65WKN / 5E11” manufactured by National Corporation) was disposed in the cylindrical body, and light was irradiated from the light source to the tape substrate for assembling the display device. Then, the number of pinholes was measured by visually observing the display device assembling tape base material from a position 30 cm vertically upward. The vertical distance from the light source to the lower surface of the display device assembly tape substrate was 20 cm. In the tape base materials for display device assembly of Comparative Examples 3 and 5, since light was transmitted through the entire surface, the presence or absence of pinholes could not be confirmed.
- the tape substrate for assembling the display device of Comparative Example 3 was not measured for the presence or absence of pinholes because it was totally transmitting light.
- the present invention has excellent light-shielding properties and light-reflecting properties, and the display panel control device can be reliably maintained without causing malfunction of the display panel control device due to the current flowing in the light-shielding layer. It can be used for a display module unit using a display panel such as a liquid crystal display panel or an organic EL (Electroluminescence) panel.
- a display panel such as a liquid crystal display panel or an organic EL (Electroluminescence) panel.
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Abstract
Description
厚みが4.5μmの無色透明なポリエチレンテレフタレートフィルム(東レ社製 商品名「5AF53」)を透明基材フィルム1として用意した。なお、ポリエチレンテレフタレートフィルムは、有色顔料を一切、含有していなかった。又、透明基材フィルム1の両面には、コロナ放電処理が施されており、透明地合フィルム1の両面の表面張力は50mN/mであった。 Example 1
A colorless and transparent polyethylene terephthalate film (trade name “5AF53” manufactured by Toray Industries, Inc.) having a thickness of 4.5 μm was prepared as the
ポリエチレンテレフタレートフィルム1の両面のそれぞれに一層の遮光基層からなる厚みが1μmの遮光層2を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Example 2)
A display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was produced in the same manner as in Example 1 except that the light-
ポリエチレンテレフタレートフィルム1の一面に積層一体化させた遮光基層上に黒色インキを塗布、乾燥させる要領を合計3回の代わりに合計1回として遮光基層が2層、互いに積層一体化してなる厚みが2μmの遮光層を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Example 3)
Applying black ink on the light-shielding base layer laminated and integrated on one surface of the
ポリエチレンテレフタレートフィルム1の両面のそれぞれに積層一体化された遮光基層上に黒色インキを塗布、乾燥させる要領を合計3回の代わりに合計4回として遮光基層が5層、互いに積層一体化してなる厚みが5μmの遮光層を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 Example 4
Thickness obtained by laminating and integrating 5 layers of light-shielding base layers with a total of 4 times instead of a total of 3 times for applying black ink on the light-shielding base layers laminated and integrated on both surfaces of the
ポリエチレンテレフタレートフィルム1の両面のそれぞれに積層一体化された遮光基層上に黒色インキを塗布、乾燥させる要領を合計3回の代わりに合計1回として遮光基層が2層、互いに積層一体化してなる厚みが2μmの遮光層を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Example 5)
Thickness obtained by laminating and integrating two light-shielding base layers, with black ink applied to the light-shielding base layer laminated and integrated on both surfaces of the
ポリエチレンテレフタレートフィルム1の一面に、遮光基層が8層、互いに積層一体化してなる厚みが8μmの遮光層2を形成したこと、ポリエチレンテレフタレートフィルム1の他面に遮光層を形成することなく、ポリエチレンテレフタレートフィルム1の他面に直接、光反射基層が3層、互いに積層一体化してなる厚みが3.9μmの光反射層3を形成したこと以外は実施例1と同様にして表示装置組み立て用粘着シートBを製造した。 (Comparative Example 1)
On one surface of the
白色樹脂フィルム(帝人社製 商品名「テフレックス」、厚み:13μm、全光線透過率:30~40%)を基材フィルムとして用意し、実施例1と同様の黒色インキを用意した。 (Comparative Example 2)
A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 μm, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
ポリエチレンテレフタレートフィルム1の両面のそれぞれに一層の遮光基層からなる厚みが0.5μmの遮光層2を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Comparative Example 3)
The display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was prepared in the same manner as in Example 1 except that the light-
ポリエチレンテレフタレートフィルムの他面に形成した遮光基層上に黒色インキを塗布、乾燥させる要領を合計3回の代わりに合計5回として遮光基層が6層、互いに積層一体化してなる厚みが6μmの遮光層を形成したこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Comparative Example 4)
Applying black ink on the light-shielding base layer formed on the other surface of the polyethylene terephthalate film and drying the black ink on the light-shielding base layer for a total of 5 times instead of a total of 6 times. A display device assembly pressure-sensitive adhesive sheet B shown in FIG. 4 was produced in the same manner as in Example 1 except that was formed.
白色樹脂フィルム(帝人社製 商品名「テフレックス」、厚み:13μm、全光線透過率:30~40%)を基材フィルムとして用意し、実施例1と同様の黒色インキを用意した。 (Comparative Example 5)
A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 μm, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
白色樹脂フィルム(帝人社製 商品名「テフレックス」、厚み:13μm、全光線透過率:30~40%)を基材フィルムとして用意し、実施例1と同様の黒色インキを用意した。 (Comparative Example 6)
A white resin film (trade name “Teflex” manufactured by Teijin Ltd., thickness: 13 μm, total light transmittance: 30 to 40%) was prepared as a base film, and the same black ink as in Example 1 was prepared.
遮光基層上に黒色インキを塗布、乾燥させる要領を合計5回の代わりに合計9回繰り返して行って、遮光基層が10層、互いに積層一体化してなる厚みが10μmの遮光層を形成したこと以外は比較例6と同様にして表示装置組み立て用粘着シートを製造した。 (Comparative Example 7)
The procedure of applying and drying black ink on the light shielding base layer was repeated 9 times in total instead of 5 times in total, except that 10 light shielding base layers and a light shielding layer having a thickness of 10 μm formed by laminating and integrating each other were formed. Produced a pressure-sensitive adhesive sheet for assembling a display device in the same manner as in Comparative Example 6.
透明樹脂フィルム(二村社製 商品名「太閤ポリエステルフィルム #23FE2002」、厚み:23μm、全光線透過率:85~95%)を基材フィルムとして用意した。 (Comparative Example 8)
A transparent resin film (trade name “Taiko Polyester Film # 23FE2002”, manufactured by Nimura Corporation, thickness: 23 μm, total light transmittance: 85 to 95%) was prepared as a base film.
ポリエチレンテレフタレートフィルム1の両面のそれぞれに一層の遮光基層からなる厚みが1μmの遮光層2を形成したこと、カーボンブラックとしてケッチェンブラック(三菱化学社製ケッチェンブラックEC)を用いたこと以外は実施例1と同様にして図4に示した表示装置組み立て用粘着シートBを製造した。 (Comparative Example 9)
Except that the light-
ポリエチレンテレフタレートフィルム1の一面に、遮光基層が6層、互いに積層一体化してなる厚みが6μmの遮光層2を形成したこと、ポリエチレンテレフタレートフィルム1の他面に遮光層を形成することなく、ポリエチレンテレフタレートフィルム1の他面に直接、光反射基層が3層、互いに積層一体化してなる厚みが3.9μmの光反射層3を形成したこと以外は実施例1と同様にして表示装置組み立て用粘着シートBを製造した。 (Comparative Example 10)
On one surface of the
ポリエチレンテレフタレートフィルム1の一面に、遮光基層が10層、互いに積層一体化してなる厚みが10μmの遮光層2を形成したこと、ポリエチレンテレフタレートフィルム1の他面に遮光層を形成することなく、ポリエチレンテレフタレートフィルム1の他面に直接、光反射基層が3層、互いに積層一体化してなる厚みが3.9μmの光反射層3を形成したこと以外は実施例1と同様にして表示装置組み立て用粘着シートBを製造した。 (Comparative Example 11)
On one surface of the
表示装置組み立て用粘着シートの光反射層についてJIS K7105に準拠して500nmにおける全光線反射率を測定した。なお、比較例2については、白色樹脂フィルムの光反射率を測定した。 (Light reflectance)
The total light reflectance at 500 nm was measured for the light reflecting layer of the pressure-sensitive adhesive sheet for assembling the display device according to JIS K7105. In Comparative Example 2, the light reflectance of the white resin film was measured.
表示装置組み立て用粘着シートの光反射層及び遮光層について、L*a*b*表色系のうち明度を表すL*をJIS Z8729に準拠して測定した。なお、比較例2について、光反射層の明度として、白色樹脂フィルムの明度を測定した。 (brightness)
The light reflecting layer and the light-shielding layer of the pressure-sensitive adhesive sheet for a display device assembly, the L * representing the L * a * b * lightness of color system was measured in accordance with JIS Z8729. In Comparative Example 2, the brightness of the white resin film was measured as the brightness of the light reflecting layer.
表示装置組み立て用粘着シートの遮光層についてJIS K7105に準拠した全光線透過率を測定した。 (Light shielding)
The total light transmittance based on JIS K7105 was measured about the light shielding layer of the adhesive sheet for a display apparatus assembly.
表示装置組み立て用テープ基材から一辺が50mmの平面正方形状の試験片Tを3枚、切り出した。次に、図7に示したように、各試験片Tに二本の鉄製の針N1、N2を10mmの間隔W1を存して互いに平行となるように突き刺した。なお、二本の針N1、N2は、試験片Tの他面側から一面側に貫通させた上で一面側から他面側に貫通させた状態とした。針N1、N2を試験片Tに貫通させている二箇所の間隔W2は10mmであった。試験片の一面又は他面とは、表示装置組み立て用テープ基材を製造する際の基材フィルムの一面又は他面にそれぞれ対応する。 (Conductivity of light shielding layer)
Three flat square test pieces T each having a side of 50 mm were cut out from the display device assembly tape base material. Next, as shown in FIG. 7, two iron needles N 1 and N 2 were pierced into each test piece T so as to be parallel to each other with an interval W 1 of 10 mm. The two needles N 1 and N 2 were allowed to penetrate from the other surface side of the test piece T to the one surface side and then penetrated from the one surface side to the other surface side. The distance W 2 between the two points through which the needles N 1 and N 2 penetrate the test piece T was 10 mm. One side or the other side of the test piece corresponds to one side or the other side of the base film when the display device assembly tape base material is manufactured.
円筒体の上端開口部上にこの上端開口部を完全に閉塞するように表示装置組み立て用テープ基材を載置した。円筒体内に光源(ナショナル社製 商品名「ダイクロビーム 110V 65W ビーム角10°型番JDR110V65WKN/5E11」)を配設して光源から光を表示装置組み立て用テープ基材に照射した。そして、表示装置組み立て用テープ基材を垂直上方30cmの位置から目視観察してピンホールの数を測定した。なお、光源から表示装置組み立て用テープ基材の下面までの垂直方向の距離は20cmとした。比較例3、5の表示装置組み立て用テープ基材は全面的に光が透過したのでピンホールの有無を確認することができなかった。 (Number of pinholes)
A tape base material for assembling the display device was placed on the upper end opening of the cylindrical body so as to completely close the upper end opening. A light source (trade name “Dycrobeam 110V
市販のパソコンのCPU(中央処理装置)をマザーボード上に取り付けるにあたって、CPUの導通端子を表示装置組み立て用テープ基材に貫通させた上でマザーボード上に取り付けた。そして、パソコンを起動させて正常に起動したか否かを確認した。表示装置組み立て用テープ基材に導電性がある場合にはパソコンは正常に起動しない。正常に起動した場合を「良(good)」とし、正常に起動しなかった場合を「不良(bad)」とした。 (Operation of electronic equipment)
When mounting a CPU (central processing unit) of a commercially available personal computer on the motherboard, the CPU's conductive terminals were passed through the display device assembly tape substrate and then mounted on the motherboard. Then, the personal computer was started and it was confirmed whether it started normally. If the tape substrate for assembling the display device is conductive, the personal computer will not start up normally. The case where it started normally was set as "good", and the case where it started normally was set as "bad".
2 遮光層
3 光反射層
4 粘着剤層
5 バックライト筐体
6 表示パネル
A 表示装置組み立て用テープ基材
B 表示装置組み立て用粘着シート
C 表示モジュールユニット DESCRIPTION OF
Claims (4)
- 基材フィルムと、上記基材フィルムの両面に積層一体化され且つ黒色着色剤としてファーネス法によって製造されたカーボンブラックを含有する厚みが1~5μmの遮光層と、上記遮光層の何れか一方の遮光層上に積層一体化された光反射層とを含むことを特徴とする表示装置組み立て用テープ基材。 A base film, a light-shielding layer having a thickness of 1 to 5 μm containing carbon black laminated and integrated on both surfaces of the base film and manufactured by a furnace method as a black colorant, and any one of the light-shielding layers A tape base material for assembling a display device, comprising: a light reflection layer laminated and integrated on the light shielding layer.
- 基材フィルムの両面にコロナ放電処理が施されていることを特徴とする請求項1に記載の表示装置組み立て用テープ基材。 2. The display device assembling tape substrate according to claim 1, wherein both surfaces of the substrate film are subjected to corona discharge treatment.
- 請求項1又は請求項2に記載の表示装置組み立て用テープ基材の少なくとも一面に粘着剤層が積層一体されていることを特徴とする表示装置組み立て用粘着シート。 A pressure-sensitive adhesive sheet for assembling a display device, wherein a pressure-sensitive adhesive layer is laminated and integrated on at least one surface of the tape substrate for assembling the display device according to claim 1.
- 内周面にパネル配設用段部が形成された枠状のバックライト筐体と、上記パネル配設用段部上に配設された表示装置組み立て用粘着シートであって、基材フィルム、上記基材フィルムの両面に積層一体化され且つ黒色着色剤としてファーネス法によって製造されたカーボンブラックを含有する厚みが1~5μmの遮光層及び上記遮光層の何れか一方の遮光層上に積層一体化された光反射層を含む表示装置組み立て用テープ基材と、上記表示装置組み立て用テープ基材の少なくとも一面に積層一体化された粘着剤層とを含む表示装置組み立て用粘着シートと、上記表示装置組み立て用粘着シート上に配設される表示パネルと、上記バックライト筐体内に積層状態にて配設される複数枚の光学フィルムとを含むことを特徴とする表示モジュールユニット。 A frame-shaped backlight housing having a panel disposition step formed on the inner peripheral surface, and a display device assembly pressure-sensitive adhesive sheet disposed on the panel disposition step, comprising a base film, Laminating and integrating on either one of the light shielding layer and the light shielding layer having a thickness of 1 to 5 μm and containing carbon black produced by the furnace method as a black colorant. A display device assembly pressure-sensitive adhesive sheet comprising a light-reflecting layer and a pressure-sensitive adhesive layer laminated and integrated on at least one surface of the display device assembly tape substrate; A display module unit comprising: a display panel disposed on an adhesive sheet for assembling the apparatus; and a plurality of optical films disposed in a laminated state in the backlight casing. Tsu door.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080011967XA CN102355991A (en) | 2009-03-17 | 2010-03-15 | Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using same |
JP2010518450A JP5651012B2 (en) | 2009-03-17 | 2010-03-15 | Display device assembly tape substrate, display device assembly pressure-sensitive adhesive sheet using the same, and display module unit |
KR1020117021455A KR101724760B1 (en) | 2009-03-17 | 2010-03-15 | Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using the same |
Applications Claiming Priority (2)
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JP2009064417 | 2009-03-17 | ||
JP2009-064417 | 2009-03-17 |
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WO2010106999A1 true WO2010106999A1 (en) | 2010-09-23 |
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Family Applications (1)
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PCT/JP2010/054353 WO2010106999A1 (en) | 2009-03-17 | 2010-03-15 | Tape base material for assembling display device, and adhesive sheet for assembling display device and display module unit using the same |
Country Status (4)
Country | Link |
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JP (1) | JP5651012B2 (en) |
KR (1) | KR101724760B1 (en) |
CN (1) | CN102355991A (en) |
WO (1) | WO2010106999A1 (en) |
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CN102925069A (en) * | 2012-10-08 | 2013-02-13 | 日月光半导体制造股份有限公司 | Rubber belt structure for sticking film to wafer, film sticking equipment and film sticking method |
WO2014061573A1 (en) * | 2012-10-18 | 2014-04-24 | シャープ株式会社 | Method for manufacturing illumination device |
JP2017185691A (en) * | 2016-04-05 | 2017-10-12 | 凸版印刷株式会社 | Light-shielding film |
WO2018047658A1 (en) * | 2016-09-08 | 2018-03-15 | エピスター コーポレイション | Optical semiconductor element coating sheet |
GB2580211A (en) * | 2018-12-21 | 2020-07-15 | Rogers Corp | Single-sided pressure-sensitive adhesive tape |
WO2024070311A1 (en) * | 2022-09-29 | 2024-04-04 | 日東電工株式会社 | Adhesive sheet |
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- 2010-03-15 KR KR1020117021455A patent/KR101724760B1/en active IP Right Grant
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Also Published As
Publication number | Publication date |
---|---|
KR20110130423A (en) | 2011-12-05 |
JPWO2010106999A1 (en) | 2012-09-20 |
JP5651012B2 (en) | 2015-01-07 |
KR101724760B1 (en) | 2017-04-07 |
CN102355991A (en) | 2012-02-15 |
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