WO2013039238A1 - 接触防止フィルム、タッチパネル及びディスプレイ装置用カバーパネル - Google Patents
接触防止フィルム、タッチパネル及びディスプレイ装置用カバーパネル Download PDFInfo
- Publication number
- WO2013039238A1 WO2013039238A1 PCT/JP2012/073743 JP2012073743W WO2013039238A1 WO 2013039238 A1 WO2013039238 A1 WO 2013039238A1 JP 2012073743 W JP2012073743 W JP 2012073743W WO 2013039238 A1 WO2013039238 A1 WO 2013039238A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- antireflection film
- protective
- column
- display device
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133502—Antiglare, refractive index matching layers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/1613—Constructional details or arrangements for portable computers
- G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
- G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
- G06F1/169—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being an integrated pointing device, e.g. trackball in the palm rest area, mini-joystick integrated between keyboard keys, touch pads or touch stripes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133331—Cover glasses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
-
- 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
- G06F3/0436—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which generating transducers and detecting transducers are attached to a single acoustic waves transmission substrate
Definitions
- the present invention relates to a contact prevention film, a touch panel, and a cover panel for a display device. More specifically, the present invention relates to a contact prevention film that hardly adheres to a member facing when pressed by a finger or the like. Moreover, it is related with the touch panel provided with the said adhesion prevention film, and the cover panel for display apparatuses as the application.
- Various devices such as a mobile phone, a mobile computer, and a personal computer include a display device that can display fine images.
- the display device when external light such as sunlight or indoor illumination light is incident on the screen, the display device is partially reflected on the screen, thereby reducing the contrast of the image and causing the screen to become whitish.
- FIG. 1A shows a display device 11 in which a cover panel 13 is superimposed on the front surface of a liquid crystal display panel 12 via an air gap (space).
- a cover panel 13 is superimposed on the front surface of a liquid crystal display panel 12 via an air gap (space).
- 4% of the incident external light is reflected by the front surface of the cover panel 13, and 3.8% of the incident external light is 3.8% of the cover panel 13.
- Reflected on the back surface 3.7% of the incident external light is reflected on the front surface of the liquid crystal display panel 12.
- the reflected light (white light) is superimposed on the image displayed on the liquid crystal display panel 12, and the contrast of the image is lowered, and the display quality is lowered.
- an antireflection film is used.
- An example of the antireflection film is disclosed in Patent Document 1.
- This antireflection film is formed by densely arranging fine optical protrusions having a refractive index equal to that of a film substrate on the surface of a transparent film substrate.
- the optical protrusion has a shape such as a cone shape, a truncated cone shape, or a quadrangular pyramid shape.
- FIG. 1B shows a case where an antireflection film 14 is pasted on the back surface of the cover panel 13.
- 4% of the incident external light is reflected by the front surface of the cover panel 13, and 0.34% of the incident external light is reflected by the back surface of the cover panel 13 and is incident. 3.8% of the external light is reflected by the front surface of the liquid crystal display panel 12.
- reflection on the back surface of the cover panel 13 to which the antireflection film 14 is pasted is greatly suppressed, and in total only 8.17% of the incident external light is reflected toward the front side. Therefore, by applying one antireflection film 14, the amount of reflected light is about 2/3 times that when the antireflection film 14 is not applied.
- the reflectance on the surface where the antireflection film is not applied is 4%
- the reflectance on the surface where the antireflection film is attached is 0.35%, but these are typical values.
- the reflectance value may be slightly different depending on the type of the antireflection film and the material of the cover panel.
- a display device used for a mobile phone, a mobile computer or the like is likely to be contaminated with dirt or sebum. Therefore, the surface of the display device is frequently rubbed with a soft cloth or a cleaner to wipe off dirt and sebum. Since the cover panel is pushed with a finger when wiping off dirt, sebum, etc. on the surface, if an anti-reflection film is applied as shown in FIG. 1 (B) or FIG. It tends to be crushed by being pressed against the opposing surface.
- the touch panel since the touch panel is pressed with a finger or a touch pen, if the antireflection film is stuck, the optical protrusions of the antireflection film are also pressed against the opposing surface and are easily crushed. If the optical protrusions are crushed in this way, the antireflection function of the antireflection film is lowered or impaired.
- Patent Document 2 describes a conical protection column such as a cone, a quadrangular pyramid, and a triangular pyramid and a columnar protection column such as a quadrangular column, a cylinder, and an elliptical column.
- the tip is easily crushed when the protection pillar is pressed against the opposing surface.
- a column-shaped protective column having a uniform cross section the releasability when molding the antireflection film is poor and the protective column is difficult to peel off from the mold, making it difficult to raise the protective column Become.
- a protective column having a truncated cone shape is generally used, but the inclination angle of the side surface is about 70 °.
- FIG. 2 is a SEM photograph of a general frustoconical protective column viewed from an oblique direction.
- FIG. 3B is a photomicrograph of the surface of the antireflection film when external light is incident on the surface
- FIG. 3D is a photomicrograph of the back surface of the antireflection film when external light is incident on the backside.
- the reason for this is as follows. As shown in the right part of FIG. 4A, when the light L1 is incident on the back surface of the truncated cone-shaped protective column 15, the incident light L1 is reflected by being totally reflected on the side surface of the protective column 15 a plurality of times. reflect. As a result, in the case of backside incidence, the reflectance of the antireflection film 14 is increased. In addition, the light L2 incident on the protective column 15 from the liquid crystal display panel 12 side is diffused by being refracted by the protective column 15, so that the haze value is also increased.
- the optical characteristics are greatly different between the case where the back surface incidence is performed and the case where the front surface incidence is performed. Therefore, for example, the optical characteristics such as reflectance and haze value differ greatly between the case where it is attached to the front surface of the liquid crystal display panel (when incident on the front surface) and the case where it is attached to the rear surface of the cover panel (when incident on the rear surface). This is inconvenient in the design or application of the display device and difficult to use.
- the present invention has been made in view of the technical problems as described above.
- the object of the present invention is to provide a back-side incident in a contact prevention film (an optical film having a contact prevention function) having a convex portion. This is to reduce the difference in optical characteristics between the case of the above and the case of surface incidence. In addition, it suppresses a phenomenon in which the convex portion is blackened when the contact prevention film is pressed (that is, when the contact prevention film is pressed against the facing member or when the facing member is pressed against the contact preventing film). There is.
- the adhesion prevention film according to the present invention is an adhesion prevention film including a film substrate and a plurality of projections formed on the surface of the film substrate, wherein the projections are directed from the proximal end side toward the distal end side.
- the cross-sectional area of the cross section parallel to the surface of the film substrate is gradually reduced, and the convex area of the projected area obtained by projecting the entire side surface of one convex portion from the direction perpendicular to the surface of the film substrate to the film substrate surface
- a side projection occupation area ratio which is a ratio with respect to a partition area of the surface of the film substrate with respect to one part, is 0.25% or less.
- the projected area ratio of the side surface projection of the convex portion is 0.25% or less. Therefore, when light is incident on the back surface of the adhesion preventing film, the light is hardly reflected and returned. Therefore, the difference in reflectance between the case where the light is incident on the back surface of the adhesion preventing film and the case where the light is incident on the front surface is small. Further, the haze value at the convex portion can be reduced. Furthermore, even when the convex portion is pressed against the opposing member (for example, an image display panel), it is possible to prevent the convex portion from appearing black and becoming black.
- the opposing member for example, an image display panel
- the cross-sectional area of the cross section parallel to the surface of the film substrate gradually decreases as the convex portion moves from the base end side to the tip end side (for example, a frustum-shaped convex portion)
- the convex part is easily peeled off from the mold during molding.
- the side projection occupation area ratio is set to 0.01% or more, the convex portion is easily peeled off from the mold.
- the side surface area ratio should just be 0.25% or less in the main area
- an inclination angle of at least a base end portion of the side surface of the convex portion is 80 ° or more and less than 90 °.
- an inclination angle at least at the base end portion of the side surface is 88 ° or less. According to this embodiment, the convex portion can be more easily peeled off from the mold.
- the column density which is the ratio of the bottom area of one protrusion to the partition area of the surface of the film substrate with respect to one protrusion, is 2. 5% or less. This is because when the column density is larger than 2.5%, the reflectance of the adhesion preventing film becomes larger than a practical value. Also, if the column density is higher than 2.5%, black stains appear to be connected in a line when the back surface of the adhesion protective film is pressed, and the screen becomes difficult to see when used in a display device. It is.
- an antireflection structure comprising a large number of fine optical protrusions is formed on the surface of the film substrate.
- the adhesion preventing film is configured as an antireflection film.
- the projections can be protected so that the optical protrusions are not crushed.
- the adhesion preventing film of the present invention is less likely to deteriorate optical characteristics such as reflectance and haze value even when applied to a touch panel (particularly the back surface of the touch panel). Further, even when the touch panel is pressed with a finger or a touch pen, black spots are less likely to occur at the convex portions. Therefore, according to the touch panel which stuck the adhesion prevention film of this invention, the quality of a touch panel can be improved.
- the quality of the display device cover panel can be improved also when the adhesion preventing film of the present invention is applied to the display device cover panel (particularly, the back surface of the display device cover panel).
- the means for solving the above-described problems in the present invention has a feature in which the above-described constituent elements are appropriately combined, and the present invention enables many variations by combining such constituent elements. .
- FIG. 1A is a schematic cross-sectional view of a display device without an antireflection film.
- FIG. 1B is a schematic cross-sectional view of a display device using a single antireflection film.
- FIG. 1C is a schematic cross-sectional view of a display device using two antireflection films.
- FIG. 2 is an SEM photograph showing a conventional protective column having a truncated cone shape.
- FIG. 3A is a diagram showing light incident on the antireflection film.
- FIG. 3B is a photomicrograph showing the state of the surface side of the antireflection film on which light is incident.
- FIG. 3C is a diagram showing light incident on the back surface of the antireflection film.
- FIG. 3A is a schematic cross-sectional view of a display device without an antireflection film.
- FIG. 1B is a schematic cross-sectional view of a display device using a single antireflection film.
- FIG. 1C is
- FIG. 3D is a photomicrograph showing the state of the back surface side of the antireflection film on which light is incident on the back surface.
- FIG. 4A is a diagram showing the behavior of light in a conventional antireflection film.
- FIG. 4B is a photograph showing a state in which a sample in which an antireflection film is pasted on a cover panel is pressed with two fingers.
- FIG. 5A is an enlarged perspective view showing a part of the antireflection film according to the present invention.
- FIG. 5B is a schematic enlarged cross-sectional view of a protective column provided on the antireflection film.
- FIG. 6 is a diagram for explaining the side projection occupation area ratio of the antireflection film.
- FIGS. 7C are perspective views showing other shapes of the protective pillars.
- FIGS. 8A, 8B, and 8D are perspective views showing still other shapes of the protective pillars.
- FIG. 8C is a cross-sectional view of the protective column illustrated in FIG.
- FIG. 9A is a perspective view showing still another shape of the protective column.
- FIG. 9B is a cross-sectional view of the protective column in FIG.
- FIG. 10 is a diagram for explaining how to obtain the side projected occupation area ratio of the protection column having a curved section and how to obtain the inclination angle of the side face.
- FIG. 11 (A) is an SEM photograph of the protective column provided on the antireflection film according to the embodiment of the present invention as seen from an oblique direction.
- FIG. 11 (A) is an SEM photograph of the protective column provided on the antireflection film according to the embodiment of the present invention as seen from an oblique direction.
- FIG. 11 (A) is an SEM photograph of the
- FIG. 11 (B) is a photomicrograph of the back surface of the antireflection film showing a state where light is incident on the back surface of the antireflection film according to the embodiment of the present invention.
- FIG. 11C is a photomicrograph of the back surface of the antireflection film showing a state when light is incident on the back surface of the antireflection film according to the conventional example.
- FIG. 12 is an enlarged perspective view showing a part of a conventional antireflection film.
- FIG. 13B is a table showing the relationship between the column density of the protection columns and the reflectance in the case of back surface reflection.
- FIG. 13A is a graph displaying the relationship shown in FIG. FIG.
- FIG. 14A is a schematic cross-sectional view showing the display device of the first embodiment in which the antireflection film according to the present invention is pasted on the back surface of the cover panel.
- FIG. 14B is a schematic cross-sectional view showing the display device of the first embodiment in which the antireflection film according to the present invention is attached to the front surface of the image display panel.
- FIG. 15A and FIG. 15B are schematic cross-sectional views showing a modification of the display device of the first embodiment.
- FIG. 16 is a schematic cross-sectional view showing another modification of the display device of the first embodiment.
- FIG. 17A is a schematic cross-sectional view showing the display device of the second embodiment.
- FIG. 17B is a plan view of the touch panel substrate.
- FIG. 18 is a schematic cross-sectional view showing a modification of the display device of the second embodiment.
- an anti-adhesion film having an optical protrusion for suppressing reflection of incident light that is, an anti-reflection film
- the present invention is an anti-adhesion film having no anti-reflection optical protrusion. There is no problem.
- the film substrate 22 is formed into a plate shape using a transparent resin having a high refractive index, such as polycarbonate resin or acrylic resin.
- the film substrate 22 may be a hard resin substrate or a thin flexible film substrate, and the thickness is not particularly limited.
- the optical protrusion 23 is a nano-sized minute protrusion, and has a conical shape, a truncated cone shape, a quadrangular pyramid shape, or the like. Moreover, the shape of the optical protrusion 23 may be a part of the spheroid.
- the protective pillars 24 have a truncated cone shape in which the area of the tip surface is smaller than the area of the bottom surface, and are arranged at a constant pitch.
- the protective column 24 has a bottom surface diameter d2 of 5 ⁇ m, a height H of 2 ⁇ m, and an inclination angle ⁇ of the side surface 24a (outer peripheral surface) of 80 ° or more and less than 90 ° (preferably 88 ° or less).
- the arrangement pitch is 50 ⁇ m.
- the protection pillar 24 is designed so that the side projection occupation area ratio is 0.01% or more and 0.25% or less.
- the side projection occupation area ratio means that the entire side surface 24a of the protection column 24 is projected onto the surface of the film substrate 22 (or the bottom surface of the protection column) from the direction perpendicular to the surface of the film substrate 22 (or the bottom surface of the protection column).
- the ratio of the projected area to the partition area of the surface of the film substrate 22 with respect to one protective pillar 24 is expressed in%.
- FIG. 6 is a diagram for specifically explaining the side projection occupation area ratio, and shows a cross section that passes through the plane of the antireflection film 21 and the center of the protective column 24 (the optical protrusion 23 is omitted).
- the projected area when the entire side surface of the protective pillar 24 is projected onto the surface of the film substrate 22 from the direction perpendicular to the surface of the film substrate 22 is the area A of the hatched region in FIG.
- the projected area A ⁇ (d2 2 -d1 2 ) / 4 on the side surface of the protection column 24.
- the partition area of the surface of the film substrate 22 with respect to one protection pillar 24 is the area Q of the area
- the side projection occupation area ratio is obtained by 100 ⁇ (projection area A ⁇ partition area Q) [%].
- the side projection occupation area ratio varies depending on the inclination angle, height, bottom surface area, tip surface area, protection column density, arrangement pitch, and the like of the side surface of the protection column.
- the protective column 24 is not limited to the truncated cone shape as described above.
- FIG. 7 (A) shows an elliptic frustum-shaped protective pillar 24 whose horizontal section is elliptical.
- FIG. 7B shows a protection pillar 24 having a truncated pyramid shape (square pyramid shape) having a rectangular bottom surface.
- FIG. 7C shows a protective pillar 24 having a truncated pyramid shape (octagonal truncated pyramid shape) whose bottom surface is an octagonal shape.
- These protective pillars 24 also have a side projection occupation area ratio of 0.01% or more and 0.25% or less. It is desirable that the inclination angle ⁇ of the side surface 24a is also 80 ° or more and less than 90 ° (preferably 88 ° or less).
- the protection pillar 24 does not need to be configured with a straight section through the center, and may include a curved line.
- the front end surface 24b is comprised by the curved surface.
- the side surface 24a and the front end surface 24b are curved, and the side surface 24a and the front end surface 24b are smoothly connected by a curved surface.
- FIG. 8C shows a cross section of the protective column 24 of FIG.
- the protective column 24 shown in FIG. 8D has a curved surface other than the bottom surface.
- the side projection occupation area ratio may be calculated by setting the surface below the upper corner as the side surface 24a and the inner side from the upper corner as the tip surface 24b.
- the boundary between the side surface 24a and the tip surface 24b is not clear and the definition of the side projection occupation area ratio as described above cannot be applied as it is.
- the side projection occupation area ratio may be obtained as follows.
- FIG. 10 shows a protective column 24 having an elliptical cross section as an example of such a protective column.
- H the height of the apex P measured from the bottom surface of the protective column 24
- points N1 and N2 on the surface of the protective column 24 at a height 1 ⁇ 2 of the height H are considered. That is, the height measured from the bottom surface of the horizontal plane T passing through the apex P and parallel to the bottom surface is H, and the points on the surface of the protective column 24 at the height H / 2 from the bottom surface are N1 and N2.
- tangent lines S1 and S2 that contact the surface of the protection column at points N1 and N2 are obtained, and intersection points between the tangent lines S1 and S2 and the bottom surface are B1, B2, and Let the intersections with T be C1 and C2.
- the frustum shape defined by the trapezoidal shape B1-N1-C1-P-C2-N2-B2 composed of the tangent line S and the horizontal plane T defined in each cross section in this way is used to calculate the side projection occupation area. It becomes a shape.
- the line segments A1 and A2 obtained by projecting the tangent lines B1-C1 and B2-C2 onto the bottom surface are 180 degrees around the central axis of the protection column 24. What is necessary is just to let the area integrated in the range of ° be the projection area A of the side surface of the protection pillar.
- the side projection occupation area ratio of each protection column 24 can be obtained by performing the above. Furthermore, it can be seen that the method of obtaining the side projection occupation area ratio as shown in FIG. 10 is particularly appropriate in consideration of the case where it is applied to the protection pillar 24 having a flat central portion of the tip surface 34b.
- the protective column 24 shown in FIGS. 9A and 9B has a rotationally symmetric shape obtained by rotating the cross-sectional shape as shown in FIG.
- the protective column 24 has a substantially truncated cone shape, but the tip surface 24b is a flat surface except for the outer peripheral portion, and the boundary between the side surface 24a and the tip surface 24b is rounded.
- Applying the method of calculating the side projection occupation area as shown in FIG. 10 to the protection pillar 24 having the shape as shown in FIGS. 9A and 9B means that the side surface 24a is extended upward and the tip is extended. Since the surface 24b is expanded outward, a truncated cone shape with a corner complemented between the side surface 24a and the tip surface 24b is considered, and the side projection occupation area ratio is calculated for the truncated cone shape. Because. Even when a truncated cone-shaped protective pillar is manufactured, the boundary between the side surface and the tip surface is rounded for manufacturing reasons, resulting in a shape as shown in FIGS. 9 (A) and 9 (B). May end up. In such a case, the side projection occupation area ratio can be obtained by the method as shown in FIG. 10, and if the side projection occupation area ratio is 0.25% or less, it is within the scope of the present invention.
- the inclination angle of the side surface of the protective column 24 is 80 ° or more and less than 90 ° (preferably 88 ° or less).
- the inclination angle of the tangent S1 or S2 at the points N1 and N2 determined as shown in FIG. 10 may be set as the inclination angle of the side surface 24a of the protective column 24.
- FIG. 11 (B) is a photomicrograph showing a state when light is incident on the back surface of the antireflection film 21 according to the embodiment of the present invention.
- the antireflection film 21 of this embodiment is provided with substantially cylindrical protective pillars 24 as shown in the SEM photograph of FIG. 11A at regular pitches as shown in FIG. That is, in the measurement sample of the embodiment, the protective column 24 is formed of a transparent resin having a refractive index of 1.54 on the surface of the PET film substrate 22 having a refractive index of 1.56.
- the protective column 24 has a bottom surface diameter d2 of 5.8 ⁇ m, a height H of 2 ⁇ m, an inclination angle of the side surface 24a in a cross section passing through the center of 88 °, and an array pitch of the protective columns 24 of 50 ⁇ m.
- the side projection occupation area ratio is 0.05%.
- FIG. 11C is a photomicrograph showing a state when light is incident on the back surface of the conventional antireflection film 14.
- the antireflection film 14 of the conventional example is provided with frustoconical protective columns 15 as shown in the SEM photograph of FIG. 2 at regular pitches as shown in FIG. That is, the measurement sample of the conventional example also has a protective column 15 formed of a transparent resin having a refractive index of 1.54 on the surface of a PET film substrate having a refractive index of 1.56.
- the protective column 15 has a bottom surface diameter of 5.8 ⁇ m, a height H of 2.3 ⁇ m, an inclination angle of the side surface 24a in a cross section passing through the center is 71 °, and an array pitch of the protective columns 24 is 50 ⁇ m.
- the side projection occupation area ratio is 0.49%. Note that the micrograph in FIG. 11C is the same as that in FIG. 3D, but the magnification is the same as in FIG. 11B.
- the reflection by the protective pillar at the time of back-side incidence is smaller than that of the conventional example, and the reflected light is almost no Disappear. Therefore, according to the embodiment of the present invention, the reflectance when light is incident on the back surface can be reduced as compared with the conventional antireflection film, and the difference in reflectance between the front surface incidence and the back surface incidence is reduced. it can.
- the antireflection film 14 of the conventional example when light is incident on the back surface as shown in FIG. 3C, the reflectance is larger than that in the case of front surface incidence, and the optical characteristics are considerably deteriorated. Therefore, when the antireflection film 14 of the conventional example is pasted on the back surface of the cover panel, the image quality is deteriorated as compared with the case where the antireflection film 14 is pasted on the front surface of the liquid crystal display panel.
- the optical characteristics such as reflectance are different between the case where the antireflection film 21 is applied to the back surface of the cover panel (in the case of the back surface incidence) and the case where the antireflection film 21 is applied to the front surface of the image display panel. The difference becomes smaller.
- the front side glass plate having a refractive index of 1.519 and the back side glass plate having a refractive index of 1.519 are opposed to each other in the front and back directions, and an adhesive layer having a refractive index of 1.46 is used. It measured using what adhered the antireflection film to the front surface of the board.
- the difference in transmittance between the back-side incident and the front-side incident is ⁇ 0.3% in the case of the antireflection film of the conventional example, but the reflection of the embodiment of the present invention.
- the prevention film it is -0.1%, and in the embodiment of the present invention, it is 1/3 times smaller.
- the difference in reflectance between the case of backside incidence and the case of frontside incidence is 0.49% in the case of the antireflection film of the conventional example. 0.07%, which is 1/7 times smaller in the embodiment of the present invention.
- the difference in haze value between the case of the back surface incidence and the case of the surface incidence is 0.6% in the case of the antireflection film of the conventional example. 0%, which is extremely small in the embodiment of the present invention.
- the antireflection film according to the present invention it can be seen that in the antireflection film provided with the protective column, the difference in optical characteristics between the back incident and the front incident can be reduced. Therefore, for example, even when pasted on the back surface of the cover panel of the display device or when pasted on the front surface of the image display panel, the same optical characteristics can be obtained, and the usability is improved.
- the side projection occupation area ratio when the side projection occupation area ratio is 0.25% or less, the black stain is not visible. When the side projection occupation area ratio is 0.25% or less, the black stain becomes invisible. The reflectance at the back side incidence becomes small, so the reflectance between the place where the finger is pressed and the place where the finger is not pressed. This is because the difference between the two becomes smaller, and the black stain becomes inconspicuous. Moreover, since the reflectance deterioration degree of the antireflection film having a protective column having a side tilt angle of 70 ° as described later is 0.41%, if the side projection occupation area ratio is 0.25% or less, The degree of deterioration of the reflectance is almost halved compared to the conventional example. Therefore, in the antireflection film according to the present invention, it is desirable that the side projection occupation area ratio of the protective column is 0.25% or less.
- the side projection occupation area ratio approaches 0%
- the protective column approaches a columnar shape with a side surface tilt angle of 0 °
- the releasability of the protective column becomes worse during molding.
- the side projection occupation area ratio is desirably 0.01% or more.
- the pitch of the protection pillars is increased, the optical projections located between the protection pillars and the protection pillars are likely to hit the opposing surfaces and be easily crushed.
- the optical projection located between the protective column and the protective column there is a risk that will hit the opposing surface and be crushed. Since the value of the side projection occupation area ratio at this time is about 0.01%, it is desirable that the side projection occupation area ratio is 0.01% or more also from this point.
- the degree of reflectivity deterioration is 0.41% according to Table 3. Therefore, if the degree of reflectance deterioration is about 1 ⁇ 2 or less of the conventional example, the degree of reflectance deterioration in Table 3 should be 0.21% or less. That is, according to Table 3, it can be seen that if the degree of reflectance deterioration is halved from the conventional example, the inclination angle of the side surface of the protective column should be 80 ° or more. On the other hand, when the inclination angle of the side surface approaches 90 °, the releasability of the protection column is deteriorated at the time of molding. Therefore, the inclination angle of the side surface of the protection column is desirably 88 ° or less.
- FIG. 13 (A) represents FIG. 13 (B) as a graph and extrapolates measurement data up to a column density of 100%.
- the column density is the area density of the protection column, and represents the ratio of the bottom area of the protection column to the partition area of the surface of the film substrate with respect to one protection column in%.
- the partition area of the surface of the film substrate 22 with respect to one protection pillar 24 is the area Q of the area
- the reflectance of the conventional product is about 0.8%, and practically, the reflectance in the case of back surface reflection should be 0.80% or less. Therefore, according to FIG. It can be seen that it should be less than 5%. Further, if the column density is higher than 2.5%, black stains due to the protective columns are likely to be connected, and there is a possibility that linear black stains are generated when two places are pressed with a finger.
- FIG. 14A shows a first embodiment of a display device to which an antireflection film 21 according to the present invention is attached.
- a display device 31 shown in FIG. 14A is obtained by overlapping a cover panel 33 with an air gap (space) on the front surface of an image display panel 32 such as a liquid crystal display panel (LCD) or an organic EL (OLED). Yes, the antireflection film 21 is pasted on the back surface of the cover panel 33.
- the display device 31 shown in FIG. 14B has an antireflection film 21 attached to the front surface of the image display panel 32.
- the image display panel 32 may be for monochrome display or for color display.
- the cover panel 33 is a protective sheet having a uniform thickness made of a transparent resin.
- the antireflection film 21 of the present invention has a small difference in optical characteristics such as reflectance and haze value between the case of incidence on the back surface and the case of incidence on the front surface. Therefore, reflection is performed when the antireflection film 21 is attached to the back surface of the cover panel 33 as shown in FIG. 14A and when it is attached to the front surface of the image display panel 32 as shown in FIG. A difference in the optical characteristics of the prevention film 21 is less likely to occur. Therefore, it is not necessary to separately prepare an antireflection film for application to the cover panel 33 and an antireflection film for application to the image display panel 32, and the number of stocks can be reduced.
- the display device 31 with the antireflection film pasted on the cover panel 33 or when designing the display device 31 with the antireflection film pasted on the image display panel 32 one type of antireflection film 21 is assumed. Therefore, the display device can be easily designed.
- the antireflection film 21 that has been pasted on the front surface of the image display panel 32 can be pasted on the back surface of the cover panel 33 according to the application.
- the antireflection film 21 of the present invention when used, black stains are less likely to occur at the pressed protective pillar 24 even when the cover panel 33 is pressed, and the screen quality of the display device 31 is improved.
- the antireflection film 21 may be combined with the antireflection film 35 in which the protective pillar 24 is not provided and only the optical protrusion 23 is provided on the film substrate 22.
- an antireflection film 21 having a protective column 24 without a protective column 24 is pasted on the front surface of the image display panel 32, and the protective column 24 is disposed on the back surface of the cover panel 33. Can be pasted.
- the display device 34 shown in FIG. 15A an antireflection film 21 having a protective column 24 without a protective column 24 is pasted on the front surface of the image display panel 32, and the protective column 24 is disposed on the back surface of the cover panel 33. Can be pasted.
- the antireflection film 21 having the protective pillars 24 is pasted on the front surface of the image display panel 32, and the antireflection film 35 having no protective pillars 24 on the back surface of the cover panel 33. May be pasted.
- the reflectance in the display device can be further reduced.
- the antireflection film 21 having the protective pillars 24 may be pasted on both the front surface of the image display panel 32 and the back surface of the cover panel 33.
- FIG. 17A shows a second embodiment of a display device to which the antireflection film 21 according to the present invention is attached.
- the display device 41 is obtained by superimposing a touch panel 42 on the front surface of an image display panel 32 such as a liquid crystal display panel (LCD) or an organic EL (OLED) via an air gap (space).
- the antireflection film 21 is pasted.
- the touch panel 42 is disposed so as to be opposed to the touch panel substrate 43 that propagates the surface acoustic wave, and the sheet material 44 that can contact the touch panel substrate 43 by pressing. It has.
- the peripheral edge of the touch panel substrate 43 and the back peripheral edge of the sheet material 44 are joined by a frame-shaped spacer 50, and the front surface of the touch panel substrate 43 and the back surface of the sheet material 44 are surrounded by the spacer 50.
- a closed space is formed.
- the touch panel substrate 43 functions as a medium that propagates a surface acoustic wave, and is made of a glass material. Since the touch panel substrate 43 is made of a glass material, the surface acoustic wave attenuation rate is low, and the surface acoustic wave can be propagated efficiently.
- the sheet material 44 is formed of a flexible soft material. Therefore, when the front surface of the sheet material 44 is pressed, the pressed portion is partially bent and the portion comes into contact with the touch panel substrate 43. When the sheet material 44 comes into contact with the touch panel substrate 43, the contact portion functions to absorb surface acoustic waves that propagate on the surface of the touch panel substrate 43.
- the touch panel substrate 43 and the sheet material 44 are substantially transparent (colorless and transparent, colored and transparent, translucent), and recognize an image displayed by the image display panel 32 behind the touch panel substrate 43 and the sheet material 44. it can.
- the touch panel substrate 43 has a structure as shown in FIG.
- An X transmitter 45 and a Y transmitter 46, an X receiver 47 and a Y receiver 48, and a reflection array 51-54 are provided on the peripheral edge of the touch panel substrate 43.
- the area other than the peripheral edge of the touch panel substrate 43 is an input detection area 49 where the back surface of the sheet material 44 comes into contact when the sheet material 44 is pressed with a finger, a finger, or a pen to perform touch input.
- a reflective array 51 is provided along the edge of the edge parallel to the X-axis direction.
- a reflective array 52 is provided along the X-axis direction on the edge of the touch panel substrate 43 facing the reflective array 51.
- a reflection array 53 is provided along the peripheral edge of the touch panel substrate 43 at the peripheral edge parallel to the Y-axis direction.
- a reflective array 54 is provided along the Y-axis direction on the edge of the touch panel substrate 43 facing the reflective array 53.
- an X transmitter 45 is provided facing one end of the reflective array 51, and an X receiver 47 facing the same end as the X transmitter placement side of the reflective array 52. Is provided.
- a Y transmitter 46 is provided at the periphery of the touch panel substrate 43 so as to face one end of the reflective array 53, and a Y receiver facing the same end as the Y transmitter placement side of the reflective array 54. 48 is provided.
- the reflection array 51 functions to reflect the surface acoustic wave propagating in the X direction and convert the propagation direction of the surface acoustic wave to the -Y direction over its entire length.
- the reflection array 52 functions to reflect the surface acoustic wave propagating in the ⁇ Y direction and convert the propagation direction of the surface acoustic wave to the ⁇ X direction over its entire length.
- the reflection array 53 has a function of reflecting the surface acoustic wave propagating in the Y direction over the entire length thereof and converting the propagation direction of the surface acoustic wave into the ⁇ X direction.
- the reflection array 54 functions to reflect the surface acoustic wave propagating in the ⁇ X direction and to change the propagation direction of the surface acoustic wave to the ⁇ Y direction over its entire length.
- the X transmitter 45 is an element for generating a surface acoustic wave on the surface of the cover panel 13 and propagating it in the X direction.
- the Y transmitter 46 generates a surface acoustic wave on the surface of the touch panel substrate 43 and moving in the Y direction. It is an element for propagating.
- the X receiver 47 is an element that receives surface acoustic waves that propagate in the ⁇ X direction on the surface of the touch panel substrate 43, and the Y receiver 48 transmits surface acoustic waves that propagate in the ⁇ Y direction on the surface of the touch panel substrate 43. It is an element to receive.
- the surface acoustic wave Sx generated by the X transmitter 45 advances in the X direction and enters the end of the reflection array 51.
- the surface acoustic wave Sx that has entered the reflection array 51 is reflected by each part of the reflection array 51 little by little while propagating through the reflection array 51 in the X direction.
- the surface acoustic wave Sx reflected by the reflection array 51 exits from the reflection array 51 and enters the input detection area 49, and propagates through the input detection area 49 in the -Y direction.
- the surface acoustic wave Sx emitted from the entire length of the reflection array 51 propagates in the ⁇ Y direction with a time difference.
- the surface acoustic wave Sx propagated in the ⁇ Y direction through the input detection area 49 reaches the reflection array 52, the surface acoustic wave Sx is reflected by the reflection array 52 and then propagates along the reflection array 52 in the ⁇ X direction. . Then, the surface acoustic wave Sx emitted from the end of the reflection array 52 is received by the X receiver 47.
- the surface acoustic wave Sy generated by the Y transmitter 46 advances in the Y direction and enters the end of the reflection array 53.
- the surface acoustic wave Sy that has entered the reflection array 53 is reflected by portions of the reflection array 53 little by little while propagating in the Y direction in the reflection array 53.
- the surface acoustic wave Sy reflected by the reflection array 53 exits from the reflection array 53 and enters the input detection area 49 and propagates through the input detection area 49 in the ⁇ X direction.
- the surface acoustic wave Sy emitted from the entire length of the reflection array 53 propagates in the ⁇ X direction with a time difference.
- the surface acoustic wave Sy propagated in the ⁇ X direction through the input detection region 49 reaches the reflection array 54
- the surface acoustic wave Sy is reflected by the reflection array 54 and then propagates along the reflection array 54 in the ⁇ Y direction. .
- the surface acoustic wave Sy emitted from the end of the reflection array 54 is received by the Y receiver 48.
- the X receiver 47 can detect the X coordinate of the pressed point from the time of the missing signal
- the Y receiver 48 can detect the Y coordinate of the pressed point from the time of the missing signal.
- This detection method is based on the following principle. If a surface acoustic wave Sx is generated in the X transmitter 45 at a certain time To, the distance to reach the X receiver 47 differs depending on the X coordinate when passing through the input detection area 49. The time to be played is also different.
- X transmission The time at which the surface acoustic wave Sx passing through the path separated by the distance Xc in the X-axis direction from the edge closest to the child 45 and the X receiver 47 is received by the X receiver 47 is represented by Ta + 2 (Xc / v).
- v is the propagation speed of the surface acoustic wave Sx.
- the Y coordinate of the pressing point is obtained in the same manner.
- the X transmitter 45, Y transmitter 46, X receiver 47, and Y receiver 48 of the touch panel 42 are electrically connected to a detection unit (detection circuit) (not shown), and the Z coordinate and Y of the pressing point The coordinates are calculated and output in the detection unit.
- FIG. 18 is a schematic cross-sectional view illustrating a modification of the display device according to the second embodiment.
- the antireflection film 21 is pasted on the back surface of the sheet material 44 of the touch panel 42.
- the antireflection film 21 causes the touch panel substrate 43 and the sheet material 44 to be excessive when touch input is performed by the protective pillar 24. The close contact can be prevented.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Surface Treatment Of Optical Elements (AREA)
Abstract
Description
携帯電話やモバイルコンピュータ、パソコンなど種々の機器は、精細な画像を表示することのできるディスプレイ装置を備えている。しかし、ディスプレイ装置は、太陽光や室内照明光などの外光が画面に入射すると、その一部が画面で反射することによって画像のコントラストが低下し、画面が白っぽくなるという不都合がある。
携帯電話やモバイルコンピュータ等に用いられるディスプレイ装置は、汚れや皮脂などが付着しやすい。そのため、ディスプレイ装置の表面は、汚れや皮脂などを拭い取るために、柔らかい布やクリーナーなどでたびたび擦られる。表面の汚れや皮脂などを拭うときにはカバーパネルが指で押されるので、図1(B)や図1(C)のように反射防止フィルムを貼っていると、反射防止フィルムの微細な光学突起が対向面に押圧されて潰れやすくなる。また、表面にタッチパネルを備えたディスプレイ装置では、指やタッチペンでタッチパネルを押圧するので、反射防止フィルムを貼っているとやはり反射防止フィルムの光学突起が対向面に押圧されて潰れやすい。こうして光学突起が潰れてしまうと、反射防止フィルムの反射防止機能が低下したり、損なわれたりする。
そのため、特許文献2に開示された反射防止フィルムでは、表面にナノオーダーの光学突起を密集して形成された反射防止フィルムに、光学突起の高さよりも高いミクロンオーダーの保護柱を散在させている。そして、保護柱によって光学突起を保護し、ディスプレイ装置の表面が押えられても光学突起が潰れにくくしている。
22 フィルム基板
23 光学突起
24 保護柱
24a 側面
24b 先端面
31、34、36、41、61 ディスプレイ装置
32 画像表示パネル
33 カバーパネル
35 反射防止フィルム
42 タッチパネル
図5(A)は、本発明に係る反射防止フィルム21の一部を拡大して示す斜視図である。図5(B)は、その凸部すなわち保護柱24の中心を通る断面を示す断面図である。反射防止フィルム21は、透明なフィルム基板22の平滑な表面に、フィルム基板22と等しい屈折率を有する透明な光学突起23を密集させて多数形成したものである。また、フィルム基板22の表面には、フィルム基板22と等しい又はほぼ等しい屈折率を有する円錐台状の透明な保護柱24(密着防止用の凸部)が一定ピッチで配列されている。
つぎに、本発明に係る反射防止フィルム21の長所を従来例の反射防止フィルム14と比較しながら説明する。
つぎに、裏面入射の場合における保護柱の側面投影占有面積率と反射率悪化度の関係、および側面投影占有面積率と保護柱の箇所に黒染みが発生するかどうかの関係を調べた。つぎの表2は、この結果を表している。
反射率悪化度=100×(R2-R1)/R1 [%]
で定義される。また、黒染みの有無は目で見て判断したものであって、「○」は指で押さえても黒染みが発生しない場合であり、「×」は黒染みが発生する場合である。
さらに、保護柱の柱密度と裏面反射の場合の反射率との関係を調べた。この結果を図13(B)に示す。また、図13(A)は図13(B)をグラフで表現し、さらに柱密度が100%まで測定データを外挿したものである。ここで、柱密度とは、保護柱の面積密度であって、保護柱の底面積の1個の保護柱に対するフィルム基板の表面の区画面積に対する割合を%で表したものである。図6を参照して説明すれば、たとえば円錐台状の保護柱の場合には、底面の直径をd2とすれば、保護柱24の底面積B=π(d22)/4である。また、1個の保護柱24に対するフィルム基板22の表面の区画面積とは、図6において破線で囲んだ領域の面積Qであって、保護柱の配列ピッチをP1、P2とすれば、1個の保護柱24あたりの区画面積Q=P1×P2である。よって、柱密度は、100×(底面積B÷区画面積Q)[%]で求められる。
図14(A)及び図14(B)は、本発明に係る反射防止フィルム21を貼ったディスプレイ装置の第1実施形態を表している。図14(A)に示すディスプレイ装置31は、液晶表示パネル(LCD)や有機EL(OLED)などの画像表示パネル32の前面に、エアギャップ(空間)を介してカバーパネル33を重ねたものであり、カバーパネル33の裏面に反射防止フィルム21を貼っている。また、図14(B)に示すディスプレイ装置31は、画像表示パネル32の前面に反射防止フィルム21を貼ったものである。なお、画像表示パネル32はモノクロ表示用のものであってもよく、カラー表示用のものであってもよい。カバーパネル33は、透明樹脂からなる均一な厚みの保護シートである。
また、反射防止フィルム21は、保護柱24がなくてフィルム基板22に光学突起23だけを設けた反射防止フィルム35と組み合わせてもよい。たとえば、図15(A)に示すディスプレイ装置34のように、画像表示パネル32の前面に保護柱24のない反射防止フィルム35を貼り、カバーパネル33の裏面に保護柱24を有する反射防止フィルム21を貼ればよい。あるいは、図15(B)に示すディスプレイ装置34のように、画像表示パネル32の前面に保護柱24を有する反射防止フィルム21を貼り、カバーパネル33の裏面に保護柱24のない反射防止フィルム35を貼ってもよい。このように、2枚の反射防止フィルム21、35を用いれば、ディスプレイ装置における反射率をより小さくできる。
図17(A)は、本発明に係る反射防止フィルム21を貼ったディスプレイ装置の第2実施形態を表している。このディスプレイ装置41は、液晶表示パネル(LCD)や有機EL(OLED)などの画像表示パネル32の前面に、エアギャップ(空間)を介してタッチパネル42を重ねたものであり、タッチパネル42の裏面に反射防止フィルム21を貼っている。
X=Xs=(t-Ta)・v/2
となる。押圧点のY座標も、同様にして求められる。
図18は、実施形態2のディスプレイ装置の変形例を示す概略断面図である。この変形例によるディスプレイ装置61においては、タッチパネル42のシート材44の裏面に反射防止フィルム21を貼っている。この変形例によれば、反射防止フィルム21は、本発明に係る反射防止フィルムの作用効果を奏することに加えて、保護柱24によって、タッチ入力の際にタッチパネル基板43とシート材44が過度に密着するのを防止することができる。
Claims (13)
- フィルム基板と、前記フィルム基板の表面に形成された複数の凸部とを備えた密着防止フィルムにおいて、
前記凸部は、基端部側から先端部側へ向かうに従って前記フィルム基板の表面と平行な断面の断面積が次第に小さくなり、
前記凸部1個の全側面を前記フィルム基板の表面に垂直な方向から前記フィルム基板表面に投影した投影面積の、前記凸部1個に対する前記フィルム基板の表面の区画面積に対する割合である側面投影占有面積率が、0.25%以下であることを特徴とする密着防止フィルム。 - 前記側面投影占有面積率が、0.01%以上であることを特徴とする、請求項1に記載の密着防止フィルム。
- 前記凸部の前記側面は、少なくともその基端部における傾斜角が80°以上90°未満であることを特徴とする、請求項1に記載の密着防止フィルム。
- 前記側面の少なくとも基端部における傾斜角が、88°以下であることを特徴とする、請求項1に記載の密着防止フィルム。
- 前記凸部1個の底面積の、前記凸部1個に対する前記フィルム基板の表面の区画面積に対する割合である柱密度が、2.5%以下であることを特徴とする、請求項1に記載の密着防止フィルム。
- 前記凸部は、錐台形状であることを特徴とする、請求項1に記載の密着防止フィルム。
- 前記フィルム基板の表面に、多数の微細な光学突起からなる反射防止構造が形成されていることを特徴とする、請求項1に記載の密着防止フィルム。
- 請求項1に記載の密着防止フィルムを貼ったタッチパネル。
- 請求項7に記載の密着防止フィルムを貼ったタッチパネル。
- 前記密着防止フィルムが裏面に貼られていることを特徴とする、請求項9に記載のタッチパネル。
- 請求項1に記載の密着防止フィルムを貼ったディスプレイ装置用カバーパネル。
- 請求項7に記載の密着防止フィルムを貼ったディスプレイ装置用カバーパネル。
- 前記密着防止フィルムが裏面に貼られていることを特徴とする、請求項12に記載のディスプレイ装置用カバーパネル。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013533747A JP5941051B2 (ja) | 2011-09-15 | 2012-09-14 | 密着防止フィルム、タッチパネル及びディスプレイ装置用カバーパネル |
DK12832193.2T DK2746824T3 (en) | 2011-09-15 | 2012-09-14 | Contact preventive film, touch panel and cover plate for a screen device |
KR1020147006882A KR101802573B1 (ko) | 2011-09-15 | 2012-09-14 | 밀착 방지 필름, 터치 패널 및 디스플레이 장치용 커버 패널 |
CN201280045117.0A CN103975257B (zh) | 2011-09-15 | 2012-09-14 | 防接触膜、触控面板及显示器装置用盖板 |
EP12832193.2A EP2746824B1 (en) | 2011-09-15 | 2012-09-14 | Contact prevention film, touch panel, and display device cover panel |
US14/344,612 US9557448B2 (en) | 2011-09-15 | 2012-09-14 | Contact prevention film, touch panel and display device cover panel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011202409 | 2011-09-15 | ||
JP2011-202409 | 2011-09-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013039238A1 true WO2013039238A1 (ja) | 2013-03-21 |
Family
ID=47883453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/073743 WO2013039238A1 (ja) | 2011-09-15 | 2012-09-14 | 接触防止フィルム、タッチパネル及びディスプレイ装置用カバーパネル |
Country Status (7)
Country | Link |
---|---|
US (1) | US9557448B2 (ja) |
EP (1) | EP2746824B1 (ja) |
JP (1) | JP5941051B2 (ja) |
KR (1) | KR101802573B1 (ja) |
CN (1) | CN103975257B (ja) |
DK (1) | DK2746824T3 (ja) |
WO (1) | WO2013039238A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150022742A1 (en) * | 2011-12-19 | 2015-01-22 | Lg Innotek Co., Ltd. | Pattern substrate and touch panel using the same |
CN104345981A (zh) * | 2013-08-07 | 2015-02-11 | 洲磊科技股份有限公司 | 具有抗反射层的触控面板 |
WO2015019869A1 (ja) * | 2013-08-05 | 2015-02-12 | シャープ株式会社 | 光検出装置、位置入力装置、および電子機器 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101852659B1 (ko) * | 2012-03-15 | 2018-04-26 | 소켄 케미칼 앤드 엔지니어링 캄파니, 리미티드 | 반사 방지 필름 |
WO2015072420A1 (ja) * | 2013-11-13 | 2015-05-21 | シャープ株式会社 | 採光フィルム |
US9898114B2 (en) | 2014-12-23 | 2018-02-20 | Intel Corporation | Electroactive privacy layer of a display device |
US11157115B2 (en) * | 2017-03-31 | 2021-10-26 | Apple Inc. | Composite cover material for sensitivity improvement of ultrasonic touch screens |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002122702A (ja) | 2000-10-17 | 2002-04-26 | Matsushita Electric Ind Co Ltd | 光学フィルム、及び表示素子 |
JP2004070164A (ja) | 2002-08-08 | 2004-03-04 | Alps Electric Co Ltd | 反射防止膜および照明装置と液晶表示装置 |
JP2006331757A (ja) * | 2005-05-25 | 2006-12-07 | Omron Corp | 面光源装置と該面光源装置を用いた画像表示装置及び電子機器 |
JP2007178873A (ja) * | 2005-12-28 | 2007-07-12 | Nikon Corp | 光学素子 |
WO2009044578A1 (ja) * | 2007-10-01 | 2009-04-09 | Omron Corporation | 反射防止シート、表示素子及びディスプレイ装置 |
JP2010117694A (ja) * | 2008-11-17 | 2010-05-27 | Shuji Iwata | 反射防止機能を有する機能性基板とその製造方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69602588T2 (de) * | 1995-03-03 | 1999-10-14 | Minnesota Mining & Mfg | Lichtlenkender film mit in der höhe variierender strukturierter oberfläche und daraus hergestellter lichtlenkender artikel |
JP2001290161A (ja) * | 2000-04-04 | 2001-10-19 | Advanced Display Inc | 液晶表示装置およびその製法 |
JP2004114339A (ja) * | 2002-09-24 | 2004-04-15 | Fuji Photo Film Co Ltd | 表面機能性部材 |
JP2004178283A (ja) | 2002-11-27 | 2004-06-24 | Fuji Photo Film Co Ltd | タッチパネルおよび表示装置 |
JP4407482B2 (ja) * | 2004-03-03 | 2010-02-03 | セイコーエプソン株式会社 | 電気光学装置および電子機器 |
JP2007076242A (ja) * | 2005-09-15 | 2007-03-29 | Fujifilm Corp | 保護フィルム |
KR101157954B1 (ko) * | 2005-09-28 | 2012-06-22 | 엘지디스플레이 주식회사 | 액정 표시 장치 및 이의 제조 방법 |
WO2007139209A1 (en) * | 2006-05-31 | 2007-12-06 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic device |
US20080049330A1 (en) * | 2006-08-25 | 2008-02-28 | 3M Innovative Properties Company | Light directing laminate |
US20100110552A1 (en) * | 2007-02-23 | 2010-05-06 | Nippon Sheet Glass Company, Limited | Antireflection structural body |
CN102016651B (zh) * | 2008-06-06 | 2013-05-22 | 夏普株式会社 | 防反射膜和具备防反射膜的光学元件、压模和压模的制造方法以及防反射膜的制造方法 |
JP2012073487A (ja) * | 2010-09-29 | 2012-04-12 | Dainippon Printing Co Ltd | 反射防止物品および表示装置 |
US8809811B2 (en) * | 2012-09-13 | 2014-08-19 | Prysm, Inc. | Reduction of intensity ringing in fluorescent displays |
-
2012
- 2012-09-14 WO PCT/JP2012/073743 patent/WO2013039238A1/ja active Application Filing
- 2012-09-14 JP JP2013533747A patent/JP5941051B2/ja not_active Expired - Fee Related
- 2012-09-14 US US14/344,612 patent/US9557448B2/en not_active Expired - Fee Related
- 2012-09-14 CN CN201280045117.0A patent/CN103975257B/zh not_active Expired - Fee Related
- 2012-09-14 EP EP12832193.2A patent/EP2746824B1/en not_active Not-in-force
- 2012-09-14 KR KR1020147006882A patent/KR101802573B1/ko active IP Right Grant
- 2012-09-14 DK DK12832193.2T patent/DK2746824T3/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002122702A (ja) | 2000-10-17 | 2002-04-26 | Matsushita Electric Ind Co Ltd | 光学フィルム、及び表示素子 |
JP2004070164A (ja) | 2002-08-08 | 2004-03-04 | Alps Electric Co Ltd | 反射防止膜および照明装置と液晶表示装置 |
JP2006331757A (ja) * | 2005-05-25 | 2006-12-07 | Omron Corp | 面光源装置と該面光源装置を用いた画像表示装置及び電子機器 |
JP2007178873A (ja) * | 2005-12-28 | 2007-07-12 | Nikon Corp | 光学素子 |
WO2009044578A1 (ja) * | 2007-10-01 | 2009-04-09 | Omron Corporation | 反射防止シート、表示素子及びディスプレイ装置 |
JP2010117694A (ja) * | 2008-11-17 | 2010-05-27 | Shuji Iwata | 反射防止機能を有する機能性基板とその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2746824A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150022742A1 (en) * | 2011-12-19 | 2015-01-22 | Lg Innotek Co., Ltd. | Pattern substrate and touch panel using the same |
US9536819B2 (en) | 2011-12-19 | 2017-01-03 | Lg Innotek Co., Ltd. | Transparent substrate having nano pattern and method of manufacturing the same |
WO2015019869A1 (ja) * | 2013-08-05 | 2015-02-12 | シャープ株式会社 | 光検出装置、位置入力装置、および電子機器 |
CN104345981A (zh) * | 2013-08-07 | 2015-02-11 | 洲磊科技股份有限公司 | 具有抗反射层的触控面板 |
Also Published As
Publication number | Publication date |
---|---|
EP2746824A4 (en) | 2015-06-24 |
KR101802573B1 (ko) | 2017-11-28 |
CN103975257A (zh) | 2014-08-06 |
JPWO2013039238A1 (ja) | 2015-03-26 |
US9557448B2 (en) | 2017-01-31 |
KR20140074899A (ko) | 2014-06-18 |
CN103975257B (zh) | 2016-06-15 |
EP2746824B1 (en) | 2016-11-02 |
DK2746824T3 (en) | 2017-02-13 |
EP2746824A1 (en) | 2014-06-25 |
US20150055032A1 (en) | 2015-02-26 |
JP5941051B2 (ja) | 2016-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5941051B2 (ja) | 密着防止フィルム、タッチパネル及びディスプレイ装置用カバーパネル | |
US20140055418A1 (en) | Touch display panel and optical touch panel thereof | |
US20150331545A1 (en) | Laminated optical element for touch-sensing systems | |
KR101852659B1 (ko) | 반사 방지 필름 | |
JP2016009271A (ja) | 映像表示システム | |
KR20150039292A (ko) | 모바일 기기용 화면 보호판 | |
EP3796626B1 (en) | Display screen and terminal | |
CN109523913B (zh) | 显示面板及显示装置 | |
US20150002437A1 (en) | Touch-sensitive display device and touch-sensitive device | |
JP7151824B2 (ja) | 表示装置、配列型表示装置 | |
JP2012078516A (ja) | インタラクティブボード用の透過型スクリーン、インタラクティブボード、インタラクティブボードシステム | |
KR101538490B1 (ko) | 광학필름 및 이를 이용한 디지털펜 시스템 | |
CN109598233B (zh) | 具有指纹辨识功能的显示装置 | |
WO2012073867A1 (ja) | 光拡散部材およびその製造方法、表示装置 | |
US20210003858A1 (en) | Optical image forming device | |
JP5931524B2 (ja) | 反射防止フィルム | |
JP6957891B2 (ja) | 反射スクリーン、映像表示装置 | |
US20150042907A1 (en) | Touch panel with an antireflection layer | |
JP7036247B2 (ja) | 反射スクリーン、映像表示装置 | |
CN112748592B (zh) | 显示面板及显示装置 | |
JP6475126B2 (ja) | 静電容量式タッチパネルを備えた入力機器、及び、入力機器の製造方法 | |
JP2020204658A (ja) | 透過型スクリーン、映像表示装置 | |
KR20130026120A (ko) | 미세구조화 광학 필름 | |
JP2005243661A (ja) | 電磁波カットフィルタ | |
JP2014071283A (ja) | 反射スクリーン、映像表示システム |
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: 12832193 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013533747 Country of ref document: JP Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2012832193 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012832193 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20147006882 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14344612 Country of ref document: US |