WO2012134173A2 - 전도성 기판 및 이를 포함하는 터치스크린 - Google Patents
전도성 기판 및 이를 포함하는 터치스크린 Download PDFInfo
- Publication number
- WO2012134173A2 WO2012134173A2 PCT/KR2012/002283 KR2012002283W WO2012134173A2 WO 2012134173 A2 WO2012134173 A2 WO 2012134173A2 KR 2012002283 W KR2012002283 W KR 2012002283W WO 2012134173 A2 WO2012134173 A2 WO 2012134173A2
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- WO
- WIPO (PCT)
- Prior art keywords
- conductive pattern
- electrically conductive
- pattern
- substrate
- darkening layer
- Prior art date
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Classifications
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- 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
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- 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
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/208—Touch screens
-
- 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
-
- 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
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Definitions
- the present invention relates to a conductive substrate and a touch screen including the same.
- a display device is a term referring to a TV or a computer monitor, and includes a display element for forming an image and a case for supporting the display element.
- the display elements include a plasma display panel (PDP), a liquid crystal display (LCD), an electrophoretic display, a cathode-ray tube (CRT), and an OLED display.
- PDP plasma display panel
- LCD liquid crystal display
- electrophoretic display electrophoretic display
- CRT cathode-ray tube
- OLED display OLED display
- the player the player.
- the display device may be equipped with an RGB pixel pattern and an additional optical filter for implementing an image.
- the touch screen having the above function can be classified as follows according to the detection method of the signal.
- a resistive type that detects a position pressed by pressure in a state in which a DC voltage is applied through a change in current or a voltage value, and capacitance coupling in a state where an AC voltage is applied.
- Electromagnetic induction electromagnetic type
- touch is detected by electrical contact or capacitance change using a transparent conductive film such as an ITO film.
- the transparent conductive film has a high or low term of 150 ohm / square or more, the sensitivity of the transparent conductive film is largely reduced, and thus, the touch pattern is fabricated using the ITO patterning process and the electrode patterning process of the metal trace part such as photolithography.
- the cost of ITO film increases rapidly as the size of the screen increases, making it difficult to increase the manufacturing cost and apply the large size.
- an attempt has been made to implement an enlargement in the manner of using a metal pattern having high conductivity in recent years. This metal pattern is advantageous in large area due to metal and high conductivity, and has advantages in yield and price due to reduced process number in terms of simultaneously forming a trace electrode and a screen part. .
- the moiré phenomenon is a phenomenon in which another interference fringe is formed by the interference between the display pixel and the pattern when a regular pattern exists on the pixel pattern or the electrode pattern of the display.
- disturbance of the pixels causes a problem of degrading the image quality of the display.
- a moiré phenomenon may occur due to the regularity of pixels and metal mesh patterns of a full plasma display. Accordingly, in order to solve this problem, once the specification of the plasma display panel (PDP) is determined, an attempt is made to solve the moiré phenomenon through the angle design of the metal mesh pattern of the optical filter.
- a substrate an electrically conductive pattern provided on at least one surface of the substrate, a darkening layer provided on at least one surface of the electric conductive pattern and disposed in an area corresponding to the electrically conductive pattern,
- the reflective diffraction intensity of the reflective diffraction image obtained by irradiating light from a point light source on one surface where the darkening layer is visible has the same configuration except that the electrically conductive pattern is made of A1 and does not include a darkening layer.
- a conductive substrate that is reduced by at least 60% relative to the conductive substrate.
- a substrate an electrically conductive pattern provided on at least one surface of the substrate, and a zero provided on at least one surface of the electric conductive pattern and corresponding to the electrically conductive pattern.
- a conductive substrate that is reduced by more than 20% compared to the conductive substrate having the same configuration except that it does not include.
- a conductive substrate comprising a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and a darkening layer provided on at least one surface of the electric conductive pattern and disposed in an area opposed to the electrically conductive pattern;
- the reflective diffraction intensity of the reflective diffraction image obtained by irradiating light from a point light source on one surface where the darkening layer of the conductive substrate is visible is the same except that the electrically conductive pattern is made of A1 and does not include a darkening layer.
- a touch screen that is reduced by at least 60% compared to a conductive substrate having a configuration.
- a conductive substrate including a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and a darkening layer provided on at least one surface of the electric conductive pattern and corresponding to the electrically conductive pattern.
- the electrical conductivity pattern is made of A1
- a touch screen that is reduced by at least 20% compared to a conductive substrate having the same configuration except that it does not include a darkening layer.
- the present invention is a display including the touch screen and the display substrate Provide this.
- the conductive substrate and the touch screen including the same according to the present invention not only have excellent conductivity without covering the field of view, but also can reduce reflection type diffraction caused by a point light source, and furthermore, display quality due to moire phenomenon. It can prevent the degradation.
- the electrically conductive pattern according to the present invention may be formed by various methods such as indirect printing, photolithography, photography, a method using a hard mask, and a sputtering method after predetermining a desired pattern. The process is easy and inexpensive.
- FIG. 1 is a diagram illustrating a reflective diffraction phenomenon of a conventional touch screen.
- FIG. 2 is a view showing the configuration of an apparatus for measuring the total reflectance of the conductive substrate according to one embodiment of the present invention.
- FIG. 3 is a diagram showing a total reflectance graph of the conductive substrate according to one embodiment of the present invention.
- FIG. 4 is a view showing a reflective diffraction apparatus for evaluating optical characteristics of a conductive substrate according to one embodiment of the present invention.
- FIG. 5 is a diagram illustrating a reflective diffraction image of a conventional conductive substrate.
- FIG. 6 is a view showing a reflective diffraction image of a conductive substrate according to one embodiment of the present invention.
- FIG. 7 is a diagram observing visually the reflective diffraction characteristics of the touch screen according to one embodiment of the present invention.
- FIG 8 and 9 are diagrams showing the total reflectance measurement results of the touch screen according to an embodiment of the present invention.
- the present invention uses this method in a real display as well as a method for minimizing reflection type diffraction caused by a point light source when using a first ordered pattern.
- the purpose of the present invention is to provide a method and criteria for evaluating the reflective diffraction phenomenon, and to propose a pattern design method for fundamentally solving the moire phenomenon mentioned at the beginning, a conductor including the same, and a touch including the same.
- the purpose is to provide a screen.
- an electrically conductive pattern formed in a regular pattern of one type such as a grid method or a linear method, may be used for a display having a regular internal structure, such as a pixel structure, or an optical having a regular pattern structure.
- a display including a film or an electrode structure there is a problem in that the moiré phenomenon occurs due to relative interference between patterns due to light sources adjacent to the pattern structure, and when such moiré phenomenon occurs, visual recognition (visibility) Will fall.
- the present invention confirmed that the intensity of the reflective diffraction greatly depends on the reflectance of the metal itself in the case of the reflective diffraction phenomenon. Accordingly, in order to reduce the reflective diffraction phenomenon of the metal, the present invention introduces a darkening layer on the surface corresponding to the conductive pattern in order to lower the reflectivity of the conductive pattern and improve absorbance characteristics.
- 1 is a touch screen including a mesh pattern according to the related art, and shows a reflection elimination phenomenon in the presence of a point light source such as sunlight.
- the conductive substrate according to the present invention includes a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and a darkening layer provided on at least one surface of the electrically conductive pattern and provided in a region corresponding to the electrically conductive pattern.
- An exemplary embodiment of the present invention includes a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and a darkening layer provided on at least one surface of the electrically conductive pattern and disposed in an area facing the electrically conductive pattern.
- Half of the reflective diffraction image obtained by irradiating light from a point light source on one surface where the darkening layer is visible Provides a conductive substrate in which the sand diffraction intensity is reduced by at least 60% compared to the conductive substrate having the same configuration except that the electrically conductive pattern is made of A1 and does not include a darkening layer.
- the reflective diffraction intensity is reduced by at least 60% compared to the conductive substrate having the same configuration except that the electric conductive pattern is made of A1 and does not include a darkening layer. May be reduced by 70% or more, and may be reduced by 80% or more. For example, it may be 60-70% reduced, 70-80% reduced, 80-85% reduced.
- the present invention provides a conductive substrate which is reduced by at least 20% compared to a conductive substrate having the same configuration except that it does not include a darkening layer.
- the total reflectance may be reduced by more than 20% compared to the conductive substrate having the same configuration except that the electrically conductive pattern is made of A1 and does not include a darkening layer, 25 It may be reduced by more than%, and may be reduced by more than 30%. For example, it may be reduced by 25 to 50%.
- the present invention may further include a transparent substrate on the side where the darkening layer of the electrically conductive substrate.
- another exemplary embodiment of the present invention is a darkening layer provided on a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and an area provided on at least one surface of the electrically conductive pattern and corresponding to the electrically conductive pattern.
- a conductive substrate comprising a conductive substrate, the transparent substrate including a transparent substrate on a surface where the darkening layer of the conductive substrate is visible, and a reflection obtained by irradiating light from a point light source on one surface where the darkening layer of the conductive substrate is visible
- the reflective diffraction intensity of the diffraction image is obtained by Provided is a turboscreen which is reduced by at least 60% compared to a conductive substrate having the same composition except that the conductive pattern is made of A1 and does not include a darkening layer.
- another embodiment of the present invention is a darkening layer provided on a substrate, an electrically conductive pattern provided on at least one surface of the substrate, and at least one surface of the electrically conductive pattern and provided in an area of the electrically conductive pattern.
- a conductive substrate including a including a transparent substrate on the surface of the dark worm of the conductive substrate visible, total reflection assuming ambient light (Ambient light) on one surface of the darkening layer of the conductive substrate is visible
- the total reflectance measured using the measuring device is 20% or more compared to the conductive substrate having the same configuration except that the electrically conductive pattern is made of A1 and does not include a darkening layer. It provides a touch screen that is reduced.
- the additional transparent substrate may include reinforcing glass, transparent plastic, and the like, but is not limited thereto.
- the darkening layer may be provided on the top and bottom surfaces of the electrically conductive pattern, and may be provided on at least a portion of the side surfaces as well as the top and bottom surfaces of the electrically conductive pattern, and the top, bottom and side surfaces of the electrically conductive pattern. It may be provided in the whole.
- the darkening layer may be provided on the entire surface of the electrically conductive pattern to reduce visibility due to the high reflectivity of the electrically conductive pattern.
- the darkening layer since the darkening layer has an extinction interference and its own absorbance under a certain thickness condition when combined with a layer having a high reflectivity such as a conductive layer, the darkening layer reflects the conductive pattern through the light and the darkening layer reflected by the darkening layer. By adjusting the amount of reflected light similarly to each other and inducing mutual interference between two lights under a certain thickness condition, the reflectivity by the conductive pattern is reduced.
- the color range of the pattern region consisting of the darkening layer and the electrically conductive pattern, measured from the view of the darkening layer of the conductive substrate, L value is 20 or less
- a value is -10-10 based on the CIE LAB color coordinate.
- the B value can be from -70 to 70
- the L value is 10
- the A value may be 5 to 5
- the B value may be 0 to 35
- the L value may be 5 or less
- the A value may be -2 to 2
- the B value may be 0 to 15.
- the total reflectance of the pattern region consisting of the darkening layer and the electrically conductive pattern measured from the view of the darkening layer of the conductive substrate according to the present invention may be 17% or less, based on the external light 550nm, 10% It may be less than or equal to 5%.
- the total reflectance means the reflectance in consideration of both the diffuse reflectance and the specular reflectance.
- the total reflectance is a value observed by measuring only the reflectivity of the surface to be measured after making the reflectance zero using a black paste or tape on the opposite side of the surface to which the reflectance is to be measured.
- the incoming light source introduced a diffuse light source most similar to the ambient light condition.
- the measurement position for measuring the reflectance was based on a position inclined about 7 degrees from the vertical line of the integrating sphere semicircle.
- 2 shows a configuration of a device for measuring the total reflectance
- FIG. 3 shows a total reflectance graph of the conductive substrate according to one embodiment of the present invention.
- the conductive substrate including the electrically conductive pattern and the darkening layer may be electrically conductive using a deposition method, for example, a sputtering method, a CVE chemical vapor deposition method, a thermal evaporation method, an e-beam deposition method, or the like.
- a deposition method for example, a sputtering method, a CVE chemical vapor deposition method, a thermal evaporation method, an e-beam deposition method, or the like.
- Layers and darkening layers can be formed and patterned to form electrically conductive patterns and darkening layers. In particular, when the sputtering method is used, the flexible property of the darkening layer is excellent.
- the thermal evaporation method and the electron beam (e-beam) evaporation method simply deposit the particles, but the sputtering method is characterized by excellent mechanical properties even when the particles form nuclei by means of lamella and the nucleus grows and bends. Moreover, when using the said sputtering method, the interface adhesive force of the said darkening layer and another layer is excellent.
- the darkening pattern can be directly formed on the substrate or the electrically conductive pattern without using the adhesive layer or the adhesive layer, and the desired thickness and pattern shape can be realized.
- the darkening layer may be patterned simultaneously with or separately from the electrically conductive pattern, but layers for forming each pattern are formed separately. However, it is most preferable to simultaneously form the electrically conductive pattern and the darkening layer so that the electrically conductive pattern and the darkening layer are present on the exact surface.
- the darkening layer and the electrically conductive pattern may include a single layer conductive layer or a structure in which at least a part of a light absorbing layer material is recessed or dispersed in the electrically conductive pattern.
- Surface treatment is different from the structure in which part of the surface side is physically or chemically modified.
- the darkening layer is provided directly on the substrate or directly on the electrically conductive pattern without interposing the adhesive layer or the adhesive layer.
- the adhesive layer or adhesive layer may affect durability or optical properties.
- the laminate included in the touch screen according to the present invention has a completely different manufacturing method compared with the case of using an adhesive layer or an adhesive layer.
- the interface characteristic of a base material or an electrically conductive pattern, and a darkening layer is excellent.
- the thickness of the darkening layer has the above-described extinction interference characteristics and absorption coefficient characteristics
- the wavelength of light is ⁇
- the thickness is satisfied, any thickness is irrelevant.
- the etching characteristics with the electrically conductive pattern during the manufacturing process it is preferable to select between 10nm to 400nm, the preferred thickness may vary depending on the material used and the manufacturing process, the scope of the present invention Is not limited by the numerical range.
- the darkening layer may be formed of a single layer or may be formed of two or more layers. It is preferable that the darkening layer is close to the color of the achromatic series. However, it does not have to be achromatic, and can be introduced if it has low reflectivity even if it has color. At this time, the achromatic color means a color that appears when light incident on the surface of an object is not selectively absorbed and is evenly reflected and absorbed for the wavelength of each component.
- the darkening pattern may be a material having a standard deviation of 50% of the total reflectance of each wavelength band when measuring the total reflectance in the visible light region (400 nm to 800 nm).
- the material of the darkening layer is not particularly limited as long as it is a light absorbing material, preferably a material made of a metal, a metal oxide, a metal nitride, or a metal oxynitride having the physical properties described above when the front layer is formed. Can be used.
- the darkening layer may be an oxide film, a nitride film, an oxide-nitride film, a carbide film, a metal film, or a combination thereof by deposition conditions set by those skilled in the art using Ni, Mo, Ti, Cr, or the like.
- the present inventors confirmed that the use of nitride simultaneously with Mo in the case of Mo has more suitable optical properties for the darkening pattern mentioned in the present invention.
- the darkening layer may include Ni and Mo simultaneously.
- the darkening pattern may include 50 to 98 atomic% of Ni and 2 to 50 atomic% of Mo, and may further include 0.01 to 10 atomic% of other metals such as Fe, Ta, and Ti. All.
- the darkening pattern may further include 0.01 to 30 atomic% nitrogen or 4 atomic% or less oxygen and carbon, if necessary.
- the darkening layer is a dielectric material selected from SiO, SiO 2 , MgF 2 and SiNx (x is an integer of 1 or more) and Fe, Co, Ti, V, Al, Cu, Au and A g It may include a metal selected from, and may further include an alloy of two or more metals selected from Fe, Co, Ti, V, Al, Cu, Au and Ag.
- the dielectric material is distributed such that it gradually decreases away from the direction in which external light is incident, and the metal and alloy components are preferably distributed in the opposite direction. At this time, the content of the dielectric material is 2Q to 50% by weight, the metal content is preferably 50 to 80% by weight.
- the darkening pattern further comprises an alloy
- the darkening pattern is It is preferable to include 10 to 30% by weight of the dielectric material, 50 to 80% by weight of the metal and 5 to 40% by weight of the alloy.
- the darkening layer may be formed of a thin film including at least one of an alloy of nickel and vanadium, an oxide of nickel and vanadium, nitride, and oxynitride.
- vanadium is contained at 26-52 atomic%, and the atomic ratio of vanadium to nickel is preferably 26/74 to 52/48.
- the darkening layer may include a transition layer having two or more elements, and one elemental composition ratio increases by up to about 20% per 100 nMs according to the direction in which external light is incident.
- one element may be a metal element such as chromium, tungsten, tantalum, titanium, iron, nickel or molybdenum, and elements other than the metal element may be oxygen, nitrogen, or carbon.
- the darkening layer may include a first chromium oxide layer, a metal layer, a crab dioxide layer and a creme mirror, wherein tungsten, vanadium, iron, chromium, molybdenum and It may include a metal selected from niobium.
- the metal layer may have a thickness of 10 to 30 nm
- the first chromium oxide layer may have a thickness of 35 to 41 nm
- the second chromium oxide layer may have a thickness of 37 to 42 nm.
- a laminated structure of an alumina (A1 2 0 3 ) layer, a chromium oxide (Cr 2 0 3 ) layer, and a chromium (Cr) layer may be used as the darkening layer.
- the alumina layer has an improvement in reflection characteristics and light diffusion prevention characteristics
- the chromium oxide layer may improve contrast characteristics by reducing mirror reflectance.
- the darkening layer is provided in the area covered by the electrically conductive pattern.
- the region facing the electrically conductive pattern means having a pattern having the same shape as the electrically conductive pattern.
- the pattern scale of the darkening layer does not need to be exactly the same as the electrically conductive pattern, and the case where the line width of the darkening layer is narrower or wider than the line width of the electrically conductive pattern is included in the scope of the present invention.
- the darkening layer preferably has an area of 80% to 120% of the area provided with the electrically conductive pattern.
- the darkening layer has a line width equal to or larger than the line width of the electrically conductive pattern. It is preferable to have a pattern form.
- the darkening layer When the darkening layer has a pattern shape having a line width larger than the line width of the electrically conductive pattern, the darkening layer may give a greater effect of masking the electrically conductive pattern when viewed by the user. There is an advantage that can effectively block the effect of its own gloss or reflection. However, even if the line width of the darkening layer is the same as the line width of the electrically conductive pattern, the desired effect of the present invention can be achieved.
- the line width of the darkening layer preferably has a width larger than the line width of the electrically conductive pattern by a value according to Equation 1 below.
- Tcon is the thickness of the conductive pattern
- 61 ⁇ 2 is the angle that the light makes with the normal to the substrate surface when light incident from the user's field of view of the touch screen passes through the edges of the conductive lung turn and the darkening pattern.
- ⁇ 3 is determined according to Snell's law by the user's view of the touch screen and the angle (0) formed by the substrate according to the refractive index of the substrate and the medium of the region where the darkening pattern and the conductive pattern are disposed, for example, the refractive index of the adhesive on the touch screen. It is the angle changed.
- the darkening pattern has a line width relative to the conductive pattern.
- the darkened pattern has the same line width as the conductive pattern, the effect desired in the present invention can be achieved.
- the specific resistance of the darkening layer may be 1 X 10 2 to 5 X 10 2 ⁇ -cm, but is not limited thereto.
- the transmittance of the darkening layer may be 35 to 60%, but is not limited thereto.
- the present invention introduces the configuration of the apparatus as shown in FIG. 4 below.
- the reflective diffraction apparatus of FIG. 4 is introduced to evaluate the reflective diffraction characteristics.
- the configuration of the reflective diffraction apparatus is shown in Table 1 below.
- the configuration of the device is configured to detect the light reflected on the sample by forming the angle at which the laser (laser) is incident and the reflected angle equal.
- the laser source used was a single light source having a wavelength of 532 nm. This is because when the mixed light is used instead of monochromatic light, the diffraction characteristics are different depending on the wavelength, and at the same time, these different diffraction characteristics overlap each other, so that the desired observation is difficult.
- the present invention introduced a diffuser (diffuser) to image the light reflected from the laser light source reflected by the sample, wherein the diffuser (bead) having a size of about 500 Was prepared by polishing.
- a camera is placed on the opposite side of the diffuser to form a reflective diffraction image.
- Image data obtained in this way is a normal image
- the intensity of the reflective diffraction was statistically calculated using a software called Scion image.
- FIG. 5 shows a reflective diffraction image of a conventional conductive substrate that does not include a darkening layer
- FIG. 6 shows a reflective diffraction image of a conductive substrate according to one embodiment of the present invention.
- the material of the electrically conductive pattern is not particularly limited, but is preferably metal.
- the material of the electrically conductive pattern is preferably a material having excellent conductivity and easy etching.
- the electric conductive pattern may be formed by using a material having high reflectivity by using the darkening layer.
- the total reflectance can be lowered through the darkening layer, the visibility of the electrical conductivity pattern can be lowered, and the contrast characteristics can be maintained or improved.
- the material of the electrically conductive pattern As a specific example of the material of the electrically conductive pattern, a single film or a multilayer film including gold, silver, aluminum, copper, neodymium, molybdenum, nickel or an alloy thereof is preferable. Although not limited, 0.01 to 10 1 is preferable in view of the conductivity of the electrically conductive pattern and the economics of the forming process.
- the patterning of the laminate including the electrically conductive pattern and the darkening layer may use a method using an etching resist pattern.
- the etch resist pattern can be formed using a printing method, a photolithography method, a method using a photography mask, or laser transfer, for example, thermal transfer imaging, and a printing method or a photolithography method is more preferable. Do.
- the electrically conductive pattern may be etched using the etching resist pattern, and the etching resist pattern may be removed.
- the electrically conductive pattern may have a line width of 10 1 or less, 0.1 to 1, 0.2 to 8, or 1 or more and 5 or less.
- the conductive pattern may have a thickness of 10 ⁇ m or less, 2 or less, and 10 to May be 300nm.
- the electrically conductive pattern is a regular pattern, and includes an intersection point formed by the intersection of any of a plurality of lines constituting the conductive pattern, the number of the intersection point is 3.5 cm X 3.5 cm It can be 3,000-123,000, can be 5,000-35,000, can be 10,000-35,000.
- the opening ratio of the electrically conductive pattern that is, the area ratio not covered by the pattern may be 70% or more, 85% or more, or 95% or more.
- the opening ratio of the electrically conductive pattern may be 90 to 99.9%, but is not limited thereto.
- the conductive pattern may be a regular pattern, or a pattern form in the art such as a mesh pattern may be used as the regular pattern.
- the pitch of the conductive pattern may be 600 or less, and may be 250 or less, which may be adjusted according to the transmittance and conductivity desired by those skilled in the art.
- the electrically conductive pattern used in the present invention has a resistivity of 1 X 10 6 um.
- a material of cm to 30 X 10 6 um ⁇ is suitable, and more preferably 7 x 10 6 um ⁇ ⁇ or less.
- the sheet resistance of the conductive substrate may be 1 to 300 ohm / square. Within this range it is advantageous for the operation of the touch screen.
- the darkening layer and the electrically conductive pattern may have a forward taper angle at the side thereof, but the darkening layer or the conductive pattern positioned on the opposite side of the substrate side of the conductive pattern may have an inverse taper angle. .
- the touch screen according to the present invention may further include a conductive substrate including an additional darkening layer in addition to the conductive substrate including the substrate, the electrically conductive pattern, and the darkening layer described above.
- the conductive substrate including the darkening layer based on the electrically conductive pattern may be disposed in different directions.
- the conductive substrate including two or more darkening layers that may be included in the touch screen of the present invention does not need to have the same structure, and any one, preferably the above-described conductive substrate on the side closest to the user, the electrically conductive pattern And a darkening layer may be included, and the conductive substrate further included may not include the darkening layer.
- an electrically conductive pattern and a darkening layer may be provided on both surfaces of the substrate, respectively.
- the touch screen according to the present invention may further include an electrode part or a pad part in addition to the effective screen part in which the electrically conductive pattern is formed on the conductive substrate, wherein the effective screen part and the electrode part / pad part are made of the same conductor. It may have the same thickness and may be seamless.
- the touch screen according to the present invention may include a protective film, a polarizing film, an antireflection film, an anti-glare film, an anti-fingerprint film, a low reflection film, and the like on one surface of each substrate.
- the aperture ratio of the touch screen according to the present invention that is, the area ratio not covered by the pattern may be 70% or more, 85% or more, or 95% or more.
- the aperture ratio of the touch screen may be 90 to 99.9%, but is not limited thereto.
- the present invention provides a method of manufacturing a touch screen.
- the present invention comprises the steps of forming an electrically conductive pattern on the substrate; And it provides a method for manufacturing a touch screen comprising the step of forming a darkening layer on the electrically conductive pattern.
- forming a conductive layer for forming a conductive pattern on the substrate Depositing a darkening layer on the conductive layer; And patterning the conductive layer and the darkening layer respectively or simultaneously.
- the touch screen according to the present invention includes the conductive substrate.
- a conductive substrate different from the exemplary embodiment of the present invention may be used as a touch sensitive electrode substrate.
- Touch screen the lower substrate; Upper substrate; And an electrode layer provided on any one surface or both surfaces of the lower substrate and the surface in contact with the upper substrate.
- the negative electrode layer may perform the functions of signal transmission and reception for X-axis position detection and ⁇ -axis position detection, respectively. Can be.
- the lower electrode and the electrode layer provided on the surface in contact with the upper substrate of the lower substrate; And one or both of the electrode layer provided on the surface in contact with the upper substrate and the lower substrate of the upper substrate may be a conductive substrate according to an embodiment of the present invention described above.
- the other may have a pattern known in the art.
- an insulating layer or a spacer is provided between the lower substrate and the upper substrate so as to maintain a constant distance between the electrode layers and prevent connection. It may be provided.
- the insulating layer may include an adhesive or UV or thermosetting resin.
- the touch screen may further include a ground connected to the aforementioned electrically conductive pattern.
- the ground portion may be formed at an edge portion of a surface on which the electrically conductive pattern of the substrate is formed.
- at least one surface of the laminate including the conductive substrate may be provided with at least one of an anti-reflection film, a polarizing film, a fingerprint.
- a touch screen such as the ⁇ ED display panel (X) LED Display Panel, PDP ), liquid crystal display (Liquid Crystal Display, LCD), and a cathode ray tube (Cathode-Ray Tube, CRT) , be applied to a display device such as PDP have.
- X ⁇ ED display panel
- PDP liquid crystal display
- LCD Liquid Crystal Display
- CRT cathode ray tube
- the present invention provides a display including the touch screen and the display module.
- Pure A1 forms a conductive mesh pattern of pitch (250 m) and line width (1 ⁇ 2m) on the PET substrate, and then stacks two sheets on the display to form the most display. After confirming the angle not to distort the quality, the two conductive substrates were laminated through an optically clear adhesive (OCA). It was attached to the tempered glass again to produce a touch screen.
- OCA optically clear adhesive
- An oxynitride was further formed by using a Mo target as a sputter apparatus on the substrate on which the front surface Cu was deposited to form a conductive layer and a darkening layer, and the thickness of the final laminate was 220 nm.
- the reflectivity of the substrate measured on the dark screen corresponds to 6.1%.
- FIG. 4 The apparatus of FIG. 4 was used to perform reflection type diffraction evaluation by allowing the laser light source to enter the tempered glass surface.
- 5 shows a reflective diffraction image of Comparative Example 1
- FIG. 6 shows a reflective diffraction image of Example 1.
- Example 1 As a result, it can be seen that the reflection type diffraction intensity of Example 1 according to the present invention is much weaker when compared with Comparative Example 1.
- the average intensity analyzed by software is about 6.09 in the case of Example 1 while the comparative example 1 is 27.8, and the reflective diffraction intensity of the conductive substrate according to the present invention is Except that the conductive pattern is made of A1 and does not include a darkening layer, it can be confirmed that the level is about 22% compared to the conductive substrate having the same configuration.
- the conductive substrate according to the present invention exhibits a reduction effect of about 78% of reflective diffraction compared to the conductive substrate having the same configuration except that the electrically conductive pattern is made of A1 and does not include a dark layer. Can be.
- the equipment in order to confirm the critical value that the intensity of the reflective diffraction image does not interfere with the readability of the gold display, the equipment is adjusted by adjusting the intensity of the reflective diffraction image at different levels of darkening. After measurement This again confirmed the critical level that the user does not interfere with readability.
- the conductive substrate according to the present invention reduces the intensity of the reflective diffraction by more than about 60%, compared to the conductive substrate having the same configuration except that the electrically conductive pattern is made of A1 and does not include a darkening layer. , It could be evaluated that there is no great difficulty in readability.
- Example 1 In order to confirm the consistency of the above-described reflective diffraction characteristic evaluation with the actual reflective diffraction, the touch screens of Example 1 and Comparative Example 1 were visually observed in the light of a point light source in the room, and the results are as follows. 7 is shown. Therefore, it can be confirmed that the visual evaluation result of the actual sample and the evaluation result using the analysis equipment are very well matched. -
- Example 1 and Comparative Example 1 were manufactured in pitch and 250 pitch, respectively, and the total reflectance was measured under ambient light conditions.
- the total reflectance measurement results for the touch screen of 300 pitch is shown in Figure 8 below
- the total reflectance measurement results for the touch screen of 250 / mi pitch is shown in Figure 9 below.
- the touch screen of the present invention has a lower total reflectance compared to the touch screen composed of pure A1. It can be seen that the total reflectance decrease is more than 20%.
- the conductive substrate and the touch screen including the same according to the present invention not only have excellent conductivity without covering the field of view, but also can reduce the reflection type diffraction phenomenon caused by the point light source, and furthermore, the moire phenomenon. This can prevent display quality deterioration.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Nonlinear Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Position Input By Displaying (AREA)
- Non-Insulated Conductors (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Claims
Priority Applications (3)
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US14/008,522 US9363888B2 (en) | 2011-03-28 | 2012-03-28 | Conductive substrate and touch screen having same |
CN201280015861.6A CN103597427B (zh) | 2011-03-28 | 2012-03-28 | 导电基板和具有该导电基板的触摸屏 |
JP2014502460A JP6070690B2 (ja) | 2011-03-28 | 2012-03-28 | 伝導性基板およびそれを含むタッチスクリーン |
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KR10-2011-0027832 | 2011-03-28 | ||
KR20110027832 | 2011-03-28 |
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WO2012134173A8 WO2012134173A8 (ko) | 2012-11-29 |
WO2012134173A3 WO2012134173A3 (ko) | 2013-02-14 |
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PCT/KR2012/002285 WO2012134175A2 (ko) | 2011-03-28 | 2012-03-28 | 전도성 기판 및 이를 포함하는 터치스크린 |
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US (2) | US9363888B2 (ko) |
JP (3) | JP6070690B2 (ko) |
KR (2) | KR101385834B1 (ko) |
CN (2) | CN103477398B (ko) |
TW (3) | TW201506738A (ko) |
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JP6070690B2 (ja) | 2017-02-01 |
KR101385898B1 (ko) | 2014-04-16 |
US20140016047A1 (en) | 2014-01-16 |
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JP6529443B2 (ja) | 2019-06-12 |
JP2014517368A (ja) | 2014-07-17 |
JP2014515141A (ja) | 2014-06-26 |
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JP2016076270A (ja) | 2016-05-12 |
TWI511168B (zh) | 2015-12-01 |
TWI463370B (zh) | 2014-12-01 |
WO2012134173A3 (ko) | 2013-02-14 |
US9313883B2 (en) | 2016-04-12 |
CN103597427A (zh) | 2014-02-19 |
CN103477398A (zh) | 2013-12-25 |
KR20120110067A (ko) | 2012-10-09 |
JP5865994B2 (ja) | 2016-02-17 |
CN103477398B (zh) | 2016-12-07 |
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