WO2021255647A1 - Film ayant une surface avec des structures saillantes étendues - Google Patents

Film ayant une surface avec des structures saillantes étendues Download PDF

Info

Publication number
WO2021255647A1
WO2021255647A1 PCT/IB2021/055281 IB2021055281W WO2021255647A1 WO 2021255647 A1 WO2021255647 A1 WO 2021255647A1 IB 2021055281 W IB2021055281 W IB 2021055281W WO 2021255647 A1 WO2021255647 A1 WO 2021255647A1
Authority
WO
WIPO (PCT)
Prior art keywords
microns
film
layer
major surface
structures
Prior art date
Application number
PCT/IB2021/055281
Other languages
English (en)
Inventor
Jonathan T. Kahl
Brett J. SITTER
Dawn V. Muyres
Gordon A. KUHNLEY
Vivian W. Jones
Luke A. Schroeder
James K. Magargee
Original Assignee
3M Innovative Properties Company
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 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Publication of WO2021255647A1 publication Critical patent/WO2021255647A1/fr

Links

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
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
    • 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

  • Electronic displays may be configured to digitally record contact positions of a stylus with the display so that a user can write on the display with the stylus.
  • the present disclosure generally relates to films having a surface with extended structures that protrude outwardly from the film.
  • the films are useful as display films where the surface with the extended structures is an outer surface of the display adapted to provide a desired haptic response (e.g., feel like writing on paper) when writing on the display with a stylus, for example.
  • a film including a first layer disposed on a second layer is provided.
  • the second layer is an adhesive layer.
  • the first layer has a first major surface facing away from the second layer.
  • the first major surface includes a plurality of structures protruding outwardly from the film and defining a plurality of intersection angles between intersecting structures.
  • the first major surface includes a plurality of extended structures protruding outwardly from the film and defining a plurality of angles between adjacent extended structures.
  • the plurality of (e.g., intersection) angles includes at least two different acute angles.
  • the structure extends along a length L of the structure, has an average width W along a direction transverse to the length and along the first major surface, and has an average height H along a direction perpendicular to the first major surface, where 10 ⁇ L/H ⁇ 1000 and 10 ⁇ L/W ⁇ 1000.
  • each structure extends along a first direction making an angle f with a same second direction where 0 ⁇ f ⁇ 90 degrees.
  • the angle f can be selected from no more than 20 predetermined angles.
  • the film has an optical haze less than 35% and an average visible light transmittance of greater than 85%.
  • the first major surface has a root-mean square surface roughness parameter Rq, a mean deviation surface roughness parameter Ra, and a maximum peak height surface roughness parameter Rp, where 0.5 microns ⁇ Rq ⁇ 3.5 microns, 0.25 microns ⁇ Ra ⁇ 3 microns, and 3 microns ⁇ Rp ⁇ 10 microns.
  • the structure for each structure in at least the majority of the (e.g., extended) structures, the structure has a generally trapezoidal shape in a cross-section orthogonal to the length of the structure.
  • the generally trapezoidal shape is wider at a bottom of the shape and narrower at an opposite top of the shape and includes opposing first and second sidewalls extending from the bottom of the shape to the top of the shape.
  • the bottom of the shape is disposed between the top of the shape and the second layer.
  • Each sidewall makes an angle of 70 to 85 degrees with the bottom of the shape.
  • a display including a display panel having a light output surface for displaying an image to a viewer and a film disposed on the light output surface.
  • the film can be any film described herein.
  • the film can have a first major surface including a plurality of (e.g., extended) structures protruding outwardly from the film and defining a plurality of angles between adjacent or intersecting structures. The first major surface faces away from the display panel.
  • FIG. 1 is a schematic cross-sectional view of an illustrative film.
  • FIG. 2 is a schematic top view of a portion of an illustrative film.
  • FIG. 3 is a schematic top view of an illustrative film.
  • FIG. 4 is a schematic cross-sectional view of an illustrative structure.
  • FIG. 5 is a schematic cross-sectional view of an illustrative display.
  • Handwriting is a complex cognitive process relying on intricate perceptual-sensorimotor combinations. For example, handwriting often utilizes many coordinated skills or activities such as visual perceptual skills, visual motor skills, muscle memory, eye-hand coordination, bilateral coordination, fine motor skills, in-hand manipulation, body posture, and letter formation.
  • coordinated skills or activities such as visual perceptual skills, visual motor skills, muscle memory, eye-hand coordination, bilateral coordination, fine motor skills, in-hand manipulation, body posture, and letter formation.
  • the role of the physically tangible writing device pen on paper, digital stylus pen and tablet, keyboard and mouse
  • embodied cognition theories suggest that perception and motor action are closely connected and reciprocally dependent.
  • writing surfaces used for currently available electronically writable digital displays do not have a surface texture that accurately reproduces the haptic response from writing on paper.
  • An object of some embodiments of the present description is to provide a fdm that can be placed on the font side of a display to provide a paper-like haptic writing user experience, a durable surface, and minimal unwanted optical effects.
  • films which include a plurality of structures protruding outwardly from the film and defining a plurality of intersection angles between intersecting structures and/or a plurality of angles between adjacent extended structures, where for each structure in at least a majority of the structures, the structure extends along a length L of the structure, has an average width W along a direction transverse to the length and along the first major surface, and has an average height H along a direction perpendicular to the first major surface, such that 10 ⁇ L/H ⁇ 1000 and 10 ⁇ L/W ⁇ 1000.
  • such films can provide a desired paper like haptic response while having a sufficiently low haze and sufficiently high transparency, for example, that the film is suitable for placing on a viewable surface of a display.
  • the geometric attributes of the structures and/or of the arrangement of the structures described further elsewhere herein provide an improved haptic response compared to traditional structures.
  • the geometric attributes may include any one or more of distribution of the structures (which may include distribution of the orientation of the structures, for example), the shape of the cross-section of the structures, and surface roughness parameters arising from the shape and distribution of the structures.
  • a structured surface of the film may be formed by in a cast and cure process.
  • the structures may be fabricated using microreplication from a tool by casting and curing a polymerizable resin (e.g., ultraviolet (UV)-curable) composition in contact with atool surface such as described in U.S. Pat. No. 5,175,030 (Lu et ah), U.S. Pat. No. 5,183,597 (Lu), and U.S. Pat. App. Pub. No. 2012/0064296 (Walker, JR. et ah), for example.
  • the tool can be structured by having grooves cut in the tool as described further elsewhere herein.
  • FIG. 1 is a schematic cross-sectional view of a film 100, according to some embodiments.
  • FIG. 2 is a schematic top view of a portion of a film 100, according to some embodiments, illustrating extended structures 114.
  • FIG. 3 is a schematic top view of fdm a 100, according to some embodiments.
  • a fdm 100 includes a first layer 110 disposed (directly or indirectly) on a second layer 120.
  • the second layer 120 is an adhesive layer.
  • the first layer 110 can be formed by compression molding a polymeric layer against a tool, for example.
  • an optional third layer 130 is disposed between the first and second layers 110 and 120.
  • the first layer 110 is formed by casting a resin between the third layer 130 and a structured tool and curing the resin.
  • the third layer 130 can be a polymeric film (e.g., the third layer can be or include polyethylene terephthalate).
  • the first layer 110 can include a radiation (e.g., ultraviolet) cured polymer (e.g., an acrylate).
  • the second layer 120 can be an optically clear adhesive (e.g., having an average optical transmittance of at least 90% and an optical haze less than 5%) and/or a pressure-sensitive adhesive.
  • the second layer 120 may be added after the first layer is formed.
  • the first layer 110 includes a first major surface 111 facing away from the second layer 120.
  • the first major surface 111 includes a plurality of structures 114 protruding outwardly from the film 100.
  • the structures 114 define a plurality of intersection angles between intersecting structures (see, e.g., FIGS. 2-3). In other embodiments, the structures 114 define a plurality of angles between adjacent extended structures (e.g.
  • the first layer 110 also includes a second major surface 112 which can be unstructured and/or substantially planar.
  • the first major surface 111 is typically an outermost major surface of the film 100 (although an additional conformal coating can be included in some embodiments), and when the film 100 is included in a display, the first major surface 111 is typically an outermost major surface of the display (e.g., facing a viewer).
  • the plurality of intersection angles, or the plurality of angles between adjacent extended structures typically includes at least two different acute angles (angles greater than zero and less than 90 degrees).
  • acute intersection angles al, a2, and a3 are illustrated.
  • the angles al, a2, and a3 may alternatively or in addition be described as angles between adjacent extended structures.
  • the structures may be shorter than schematically illustrated in FIG. 2 and angles between adjacent structures may be defined as angles between the extension directions of the structures rather than intersection angles.
  • An angle a4 between adjacent nonintersecting structures 114b and 114d is illustrated.
  • the structures 114 may be arranged substantially uniformly across the major surface 111 as schematically illustrated in FIG. 3, for example.
  • the plurality of structures 114 covers from 2% to 30%, or from 5% to 20% of a total area of the first major surface 111.
  • the film 100 has a length LI and a width W 1 along respective orthogonal length and width directions and the structures 114 have an average (unweighted mean) length (e.g., L) less than each of the length LI and the width W 1.
  • the structures 114 are substantially uniformly pseudorandomly distributed.
  • the spatial distribution and/or the orientation distribution can be pseudorandom.
  • Pseudorandomly distributed structures are structures that appear to be randomly distributed, but are derived from, at least in part, a deterministic process.
  • pseudorandomly distributed structures may be generated from a computer algorithm to mimic randomly distributed structures. Since the pattern of the structures result from a deterministic algorithm in this case, the structures can be described as pseudorandomly distributed. Such computer-generated patterns may also repeat a locally disordered pattern so that there is a degree of long-range order.
  • the structures schematically illustrated in FIG. 3, for example, may be described as substantially uniformly pseudorandomly distributed.
  • the regularity (e.g., degree of short and/or long range regularity) of the structured surface can be characterized as described in International Appl. Pub. No. WO 2019/197956 (Atkinson et al.), for example.
  • each structure 114 extends along a first direction making an angle f (e.g., f1, cp2, cp3) with a same second direction.
  • the angle f is defined such that 0 ⁇ f ⁇ 90 degrees.
  • the first direction 119 is along the length L of the structure and the same second direction can be the x-direction referring to the illustrated x-y-z coordinate system.
  • Structures 114a and 114b each makes an angle cpl (about 20 degrees in the illustrated embodiment) with the x-direction
  • structures 114c and 114d each makes an angle cp2 (about 50 degrees in the illustrated embodiment) with the x-direction.
  • Structures 114a and 114b are intersecting structures defining an acute angle al (about 40 degrees in the illustrated embodiment) therebetween.
  • Structures 114a and 114c are intersecting structures defining an acute angle a2 (about 70 degrees in the illustrated embodiment) therebetween.
  • Structures 114c and 114d are intersecting structures defining an acute angle a3 (about 80 degrees in the illustrated embodiment) therebetween.
  • Structures 114b and 114d are adjacent nonintersecting structures defining an acute angle a4 (about 70 degrees in the illustrated embodiment) therebetween.
  • the structures 114 can be formed from a tool that is structured by having grooves cut in the tool that correspond to the structures 114.
  • the grooves can have an orientation defined by selecting a predetermined set of angles cpi (e.g., cpl, cp2, cp3) relative to a fixed direction and cutting grooves in the tool along the directions defined by the angles (e.g., direction(s) rotated clock and/or anticlockwise by the angle cpi from the fixed direction).
  • the spatial pattern of the grooves can be selected to provide a substantially uniform distribution of the grooves.
  • Related distributions of structures are described in International Appl. Pub. No. WO 2019/193501 (Kallman et al.).
  • the angle f is selected from no more than 20 predetermined angles, or no more than 15 predetermined angles, or no more than 12 predetermined angles, or no more than 10 predetermined angles, or no more than 8 predetermined angles. In some embodiments, the number of predetermined angles is at least 3 or at least 4.
  • the structure extends along a length L of the structure, has an average width W along a direction transverse to the length and along the first major surface, and has an average height H along a direction perpendicular to the first major surface, where 10 ⁇ L/H ⁇ 1000 and 10 ⁇ L/W ⁇ 1000, or 20 ⁇ L/H ⁇ 1000 and 20 ⁇ LAV ⁇ 1000, or 40 ⁇ L/H ⁇ 1000 and 40 ⁇ LAV ⁇ 1000, or 50 ⁇ L/H ⁇ 800 and 50 ⁇ L/W ⁇ 800.
  • the width is the largest width along a direction transverse to the length and along the first major surface.
  • the average width W is the unweighted mean of the width over the length of the structure.
  • the average height H is the unweighted mean of the height over the length of the structure.
  • the at least a majority of structures used to characterize the angles f can be the same as the at least a majority of structures used to characterize L, W, and H, and/or can be the same used to characterize a cross-section shape of the structures described further elsewhere herein.
  • the at least a majority of the structures includes at least 80%, or at least 90%, or at least 95% of the structures.
  • FIG. 1 schematically illustrates a normally incident light 157a and a transmitted light 157b.
  • the light 157a is incident on second layer 120 along the +z direction but could alternatively be incident on the first layer 110 along the -z direction.
  • Light 157a, 157b schematically illustrates low haze (no scattering is shown) and high transmittance (the arrow representing light 157b has an approximately same length as the arrow representing light 157a).
  • the film 100 has an optical haze less than 35% and an average visible light transmittance (e.g., unweighted mean transmittance of normally incident light 157a in a wavelength range of 400 nm to 700 nm) of greater than 85%.
  • the optical haze is less than 20%, or less than 15%, or less than 12%.
  • Optical haze and transmittance can be determined according to the ASTM D1003- 13 test standard, for example.
  • the first major surface 111 can be characterized by various surface roughness parameters such as the a root-mean square surface roughness parameter Rq (square root of mean of squared displacement of the surface from a mean plane), a mean deviation surface roughness parameter Ra (mean of magnitude of displacement of the surface from a mean plane), a maximum peak height surface roughness parameter Rp (maximum peak height above a mean plane), and/or a maximum valley depth surface roughness parameter Rv (maximum valley depth below a mean plane, defined herein to be a positive quantity).
  • the surface roughness parameters can be determined from surface profilometry measurements as is known in the art.
  • the surface roughness parameters can be determined according to the ISO 4287: 1997 standard, for example.
  • a surface roughness parameter Ri is schematically illustrated in FIG. 1.
  • Ri can schematically represent any of Rq, Ra, Rp, or Rv, for example.
  • the first major surface 111 has a root-mean square surface roughness parameter Rq, a mean deviation surface roughness parameter Ra, and a maximum peak height surface roughness parameter Rp, where 0.5 microns ⁇ Rq ⁇ 3.5 microns, 0.25 microns ⁇ Ra ⁇ 3 microns, and 3 microns ⁇ Rp ⁇ 10 microns. In some embodiments, 0.6 microns ⁇ Rq ⁇ 2 microns, 0.3 microns ⁇ Ra ⁇ 1.5 microns, and 4 microns ⁇ Rp ⁇ 8 microns. In some embodiments, the first major surface 111 has a maximum valley depth surface roughness parameter Rv, where 0.7 microns ⁇ Rv ⁇ 8 microns, or 0.7 microns ⁇ Rv ⁇ 2 microns.
  • the structure has a generally trapezoidal shape in a cross-section orthogonal to the length of the structure, the generally trapezoidal shape (e.g., trapezoidal or nominally trapezoidal or trapezoidal except for radiused comers) being wider at a bottom 115 of the shape and narrower at an opposite top 116 of the shape and including opposing first and second sidewalls 117 and 118 extending from the bottom 115 of the shape to the top 116 of the shape.
  • the bottom 115 of the shape is disposed between the top 116 of the shape and the second layer 120. The bottom 115 of the shape is even with the adjacent portions of the first major surface 111 not including a structure 114.
  • Each sidewall 117, 118 makes an angle Q1, Q2 of 70 to 85 degrees, or 72 to 83 degrees, or 75 to 80 degrees with the bottom 115 of the shape.
  • the generally trapezoidal shape has radiused comers adjacent the top of the shape.
  • the generally trapezoidal shape can be a generally isosceles trapezoidal shape (01 and Q2 about equal).
  • can be less than 5 degrees, or less than 4 degrees, or less than 3 degrees.
  • FIG. 4 is a schematic cross-sectional view of a stmcture 214, according to some embodiments, having a generally trapezoidal shape having radiused comers 221 and 222.
  • the sidewalls 217 and 218 can be considered to include a lower portion of the radiused comers 221 and 222, respectively, and the top 216 can be considered to include upper portions of the radiused comers 221 and 222 so that the sidewalls 217 and 218 can be described as extending from the bottom of the shape to the top of the shape.
  • the generally trapezoidal shape includes a first radiused comer 221 between a substantially planar (e.g., planar or nominally planar or planar up to variations small compared to the width of the generally trapezoidal shape or small compared to the radius of curvature of the radiused comers) portion 217a of the first sidewall 217 and a substantially planar portion 216a of the top 216 of the shape and a second radiused comer 222 between a substantially planar portion 218a of the second sidewall 218 and the substantially planar portion 216a of the top 216 of the shape.
  • a substantially planar e.g., planar or nominally planar or planar up to variations small compared to the width of the generally trapezoidal shape or small compared to the radius of curvature of the radiused comers
  • each of the first and second radiused comers 221 and 222 has a radius of curvature (rcl and rc2, respectively) in a range of 0.3 to 3 microns, or 0.5 to 2 microns, or 0.7 to 1.3 microns.
  • FIG. 5 is a schematic cross-sectional view of a display 200, according to some embodiments.
  • the display 200 includes a display panel 250 having a light output surface 252 for displaying an image 254 to a viewer 256 and including a film 100’ disposed on the light output surface 252.
  • the first major surface 111 faces away from the display panel.
  • the film 100’ may correspond to the film 100 except that the optional third layer 130 is not included in the film 100’.
  • the film 100 with the third layer 130 may be disposed on the light output surface 252 of the display panel 250 in place of the film 100’.
  • the display 200 is a writable display.
  • the writable display is configured to sense contact (e.g., electronically via a change in a dielectric response) of a writing article 259 with the first major surface 111 of the film 100, 100’.
  • the writing article 259 may be a stylus or a finger, for example.
  • the display 200 is configured to be electronically writable with a stylus and the first major surface 111 is configured to provide a haptic response through the stylus (e.g., to a hand of a user writing with the stylus).
  • the film 100, 100’ may have a low dielectric constant so that it does not substantially interfere with the display’s measurement of the dielectric response resulting from the presences of the writing article 259.
  • the film has a dielectric constant of less than 7, or less than 6, or less than 5, or less than 4, or less than 3.
  • the dielectric constant can be determined according to the ASTM D 150- 18 “Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation” test standard, for example.
  • the dielectric constant can be understood to be determined at a frequency of 500 kHz and at a temperature of 23 °C unless specified differently.
  • the film includes a plurality of layers.
  • the dielectric constant of the film can be understood to be the volume-weighted average of the dielectric constants of the layers.
  • each layer has a dielectric constant at 500 kHz of less than 7, or less than 6, or less than 5, or less than 4, or less than 3.
  • Useful polymeric materials for use as or in a layer of the film include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene, polyethylene, and polymethylmethacrylate (PMMA), for example. Examples
  • the films of Examples 1-4 were made as follows.
  • a tool was fabricated using methods similar to those described in U.S. Pat. Appl. Pub. No. 2010/0302479 (Aronson et ah).
  • the tool was used to make the films by means of a cast and cure process as generally described in U.S. Pat. No. 5,175,030 (Lu et ah).
  • the resin used in the cast and cure process was a resin suitable for optical use and had a refractive index of 1.57.
  • the substrate used in the cast and cure process was a 75 micron thick substrate made from PET.
  • the tool included grooves where each groove was cut at a predetermined angle relative to a fixed direction. The number of different predetermined angles used for each Example and the percent area coverage of the resulting structures are reported in the table below.
  • Comparative Example Cl was a film obtained from Tactus (Fremont CA, USA) under the TRUEWRITE tradename.
  • Test materials included eight coated samples, three writing styluses, one black box for obscuring test samples, and earplugs. 16 participants were selected to evaluate the surfaces of each of the test material by touch, also referred to as haptic evaluation, through the use of various styluses. Of the 16 participants, 12 were professional designers and 4 were scientists/engineers.
  • the participants were not involved with the development work included in the present disclosure.
  • the test materials were rated on two scales.
  • One scale evaluated how much the surface resembles paper from 0 (does not feel like paper writing surface at all) to 10 (indistinguishable from paper writing surface) with respect to each participant’s perception of what an ideal paper writing surface should feel like.
  • the other scale was a subject preference score evaluating the subjects’ overall satisfaction with using the surface from 0 (subject does not like the surface at all) to 10 (the surface is the subject’s ideal writing experience).
  • test material measuring 6.3 centimeters wide by 13.9 centimeters long, was adhered to a glass substrate having the same dimensions and a thickness of 0.25 centimeters.
  • the test specimen was placed in a holder to prevent sliding and the holder was provided with a gripping surface on the bottom.
  • a box-like enclosure measuring 39.5 centimeters wide by 38 centimeters high by 45.5 centimeters deep (15.6 inches by 15.0 inches by 17.9 inches), was placed over the holder / test specimen.
  • the enclosure was partially open along its bottom edge on one side to permit the participants to place their hand and writing apparatus on the surface of each of the test specimen while preventing them from seeing the materials. This opening extended across the entire width and had a height of 18.5 centimeters (7.3 inches).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)

Abstract

Un film comprend une première couche disposée sur une seconde couche. La seconde couche est une couche adhésive. La première couche a une première surface principale opposée à la seconde couche. La première surface principale comprend une pluralité de structures faisant saillie vers l'extérieur à partir du film et définissant une pluralité d'angles entre des structures adjacentes ou croisées. La pluralité d'angles comprend au moins deux angles aigus différents. Pour chaque structure dans au moins une majorité des structures : la structure s'étend le long d'une longueur L de la structure, a une largeur moyenne W le long d'une direction transversale à la longueur et le long de la première surface principale, et a une hauteur moyenne H le long d'une direction perpendiculaire à la première surface principale, où 10 ≤ L/H ≤ 1000 et 10 ≤ L/W ≤ 1000.
PCT/IB2021/055281 2020-06-17 2021-06-15 Film ayant une surface avec des structures saillantes étendues WO2021255647A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063040225P 2020-06-17 2020-06-17
US63/040,225 2020-06-17

Publications (1)

Publication Number Publication Date
WO2021255647A1 true WO2021255647A1 (fr) 2021-12-23

Family

ID=79268697

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/055281 WO2021255647A1 (fr) 2020-06-17 2021-06-15 Film ayant une surface avec des structures saillantes étendues

Country Status (1)

Country Link
WO (1) WO2021255647A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170139500A1 (en) * 2015-11-16 2017-05-18 Microsoft Technology Licensing, Llc Touch screen panel with surface having rough feel
US20180364822A1 (en) * 2015-12-07 2018-12-20 Dai Nippon Printing Co., Ltd. Writing sheet for touch panel pen, touch panel, touch panel system, display device, and method for selecting writing sheet for touch panel pen
WO2019193501A1 (fr) * 2018-04-04 2019-10-10 3M Innovative Properties Company Structures non continues chaotiques utiles pour les systèmes adhésifs fonctionnels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170139500A1 (en) * 2015-11-16 2017-05-18 Microsoft Technology Licensing, Llc Touch screen panel with surface having rough feel
US20180364822A1 (en) * 2015-12-07 2018-12-20 Dai Nippon Printing Co., Ltd. Writing sheet for touch panel pen, touch panel, touch panel system, display device, and method for selecting writing sheet for touch panel pen
WO2019193501A1 (fr) * 2018-04-04 2019-10-10 3M Innovative Properties Company Structures non continues chaotiques utiles pour les systèmes adhésifs fonctionnels

Similar Documents

Publication Publication Date Title
KR102489575B1 (ko) 텍스처링된 유리 컴포넌트를 갖는 전자 디바이스 인클로저
Deng et al. Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness
JP6553512B2 (ja) フレネルレンズフィルムを用いた装飾フィルム物品
Cavarretta The influence of particle characteristics on the engineering behaviour of granular materials
CN108369463A (zh) 触控面板笔用书写片、触控面板、触控面板系统、显示装置和触控面板笔用书写片的筛选方法
CN103733094A (zh) 静电电容式触摸面板及防眩性膜
JP2017522589A (ja) スパークルを低減するための光学積層体
JP6014551B2 (ja) タッチパネルセンサ
US20130157010A1 (en) Transparent conductive film
CN108700684B (zh) 光学层叠体、偏光板及显示装置
JP2015109048A (ja) ペン入力装置用フィルム
JP2012068473A (ja) 液晶表示装置
Eifler et al. Comparison of material measures for the determination of transfer characteristics of surface topography measuring instruments
WO2021255647A1 (fr) Film ayant une surface avec des structures saillantes étendues
JP2021073593A (ja) タッチパネル、表示装置、光学シート及び光学シートの選別方法
Van der Horst et al. Using curvature information in haptic shape perception of 3D objects
Naderi et al. Three-dimensional virtual microstructure generation of porous polycrystalline ceramics
Gedsun et al. Bending as key mechanism in the tactile perception of fibrillar surfaces
US11907447B2 (en) Polymeric film having structured surface
Zhang et al. Textured Polymer Surfaces Mimicking the Tactile Friction Between Wood and Skin
JP6544286B2 (ja) 印刷物
TW201337615A (zh) 減少光學堆疊之漫反射之系統及方法
Bastos et al. Analytical and numerical analysis of human dental occlusal contact
JP4384250B1 (ja) 透明導電性積層体およびそれを用いた透明タッチパネル
Belhadjamor et al. Study of the Anti-fingerprint Function: Effect of Some Texture Properties on the Finger Contact Area

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21826625

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21826625

Country of ref document: EP

Kind code of ref document: A1