US20150346866A1 - Touch panel - Google Patents

Touch panel Download PDF

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Publication number
US20150346866A1
US20150346866A1 US14/725,205 US201514725205A US2015346866A1 US 20150346866 A1 US20150346866 A1 US 20150346866A1 US 201514725205 A US201514725205 A US 201514725205A US 2015346866 A1 US2015346866 A1 US 2015346866A1
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US
United States
Prior art keywords
conductive layer
layer
touch panel
light
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/725,205
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English (en)
Inventor
Koji KUSUNOKI
Hiroyuki Miyake
Kazunori Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Semiconductor Energy Laboratory Co Ltd
Original Assignee
Semiconductor Energy Laboratory Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Semiconductor Energy Laboratory Co Ltd filed Critical Semiconductor Energy Laboratory Co Ltd
Assigned to SEMICONDUCTOR ENERGY LABORATORY CO., LTD. reassignment SEMICONDUCTOR ENERGY LABORATORY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUSUNOKI, KOJI, WATANABE, KAZUNORI, MIYAKE, HIROYUKI
Publication of US20150346866A1 publication Critical patent/US20150346866A1/en
Priority to US16/884,154 priority Critical patent/US11644869B2/en
Priority to US18/136,384 priority patent/US20230376076A1/en
Abandoned legal-status Critical Current

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    • 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
    • G—PHYSICS
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    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
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    • 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
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    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
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    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • G06F1/1618—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position the display being foldable up to the back of the other housing with a single degree of freedom, e.g. by 360° rotation over the axis defined by the rear edge of the base enclosure
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    • 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
    • G06F1/1675—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts
    • G06F1/1677—Miscellaneous details related to the relative movement between the different enclosures or enclosure parts for detecting open or closed state or particular intermediate positions assumed by movable parts of the enclosure, e.g. detection of display lid position with respect to main body in a laptop, detection of opening of the cover of battery compartment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
    • G06F2200/163—Indexing scheme relating to constructional details of the computer
    • G06F2200/1633—Protecting arrangement for the entire housing of the computer
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    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04101—2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
    • G—PHYSICS
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    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
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    • 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
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    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
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    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
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    • 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
    • G—PHYSICS
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    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04808—Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • Recent display devices are expected to be applied to a variety of uses and become diversified.
  • a smartphone and a tablet with a touch panel are being developed as portable information terminals.
  • the touch panel include an insulating layer, the first conductive layer and the second conductive layer overlap with each other in a region, and the insulating layer is positioned between the first conductive layer and the second conductive layer in a region.
  • FIGS. 9A to 9E show structure examples of a touch panel of an embodiment.
  • FIGS. 10A and 10B show a structure example of a touch panel of an embodiment.
  • FIG. 20 shows a structure of a touch panel of an example.
  • a capacitive touch sensor is used as a touch sensor of a touch panel.
  • the touch sensor 22 includes a plurality of conductive layers 23 , a plurality of conductive layers 24 , and a plurality of conductive layers 25 .
  • Each of the conductive layers 23 has a shape extending in one direction.
  • the plurality of conductive layers 23 are arranged in a direction crossing the extending direction.
  • Each of the conductive layers 24 is positioned between two adjacent conductive layers 23 .
  • Each of the conductive layer 25 electrically connects two conductive layers 24 adjacent in the direction crossing the extending direction of the conductive layers 23 . That is, the plurality of conductive layers 24 arranged in the direction crossing the extending direction of the conductive layers 23 are electrically connected to each other with the plurality of conductive layers 25 .
  • the conductive layer 23 and the conductive layer 25 overlap with each other.
  • the conductive layer 23 , the conductive layer 25 , and an insulating layer which is provided therebetween and functions as a dielectric form a capacitor 11 . Therefore, the conductive layer 23 and the conductive layer 25 partly function as the pair of electrodes of the capacitor 11 .
  • a low-resistance material is preferably used as a material of conductive films such as the conductive layer 23 , the conductive layer 24 , and the conductive layer 25 , i.e., a wiring and an electrode in the touch panel.
  • metal such as silver, copper, or aluminum may be used.
  • a metal nanowire including a number of conductors with an extremely small width may be used. Examples of such a metal nanowire include an Ag nanowire, a Cu nanowire, and an Al nanowire.
  • the IC can be mounted on the substrate 31 by a COG method or a COF method.
  • the FPC 42 , a TAB, a TCP, or the like on which an IC is mounted can be attached to the substrate 31 .
  • an object in which an IC or a connector such as an FPC is mounted on the display panel 30 can be referred to as a display panel module.
  • Each coloring layer 52 has a function of transmitting light in a particular wavelength range.
  • the coloring layer 52 R transmits red light
  • the coloring layer 52 G transmits green light
  • the coloring layer 52 B transmits blue light.
  • One of the display elements 51 and one of the coloring layers 52 are provided to overlap with each other, whereby only light in a particular wavelength range in light emitted from the display element can be transmitted to the substrate 21 side.
  • the conductive layer 23 , the conductive layer 25 , and the insulating layer 28 provided therebetween form the capacitor 11 . Furthermore, the two conductive layers 24 between which the conductive layer 23 is provided are electrically connected to the conductive layer 25 through the openings 27 formed in the insulating layer 28 .
  • An insulating layer 212 , an insulating layer 213 , an insulating layer 214 , an insulating layer 215 , an insulating layer 216 , an insulating layer 217 , an insulating layer 218 , a spacer 219 , a conductive layer 225 , and the like are provided over the substrate 31 with an adhesive layer 211 provided therebetween.
  • the transistor 201 for controlling current and the transistor 202 for controlling switching are provided in the pixel 33 .
  • One of a source and a drain of the transistor 201 is electrically connected to the first electrode 221 through the conductive layer 225 .
  • a material that can be used for the coloring layer 52 a metal material, a resin material, and a resin material containing a pigment or dye can be given.
  • the insulating layer 264 is provided to cover the light-blocking layer 53 .
  • the insulating layer 264 may have a function of a planarization film.
  • an organic insulating material is preferably used for the insulating layer 264 because a layer with high planarity can be formed at a low temperature.
  • an inorganic insulating material is preferably used for the insulating layer 264 because the insulating layer 264 can function as an etching stopper at the time of processing the conductive layer 23 and the conductive layer 24 .
  • the conductive layer 23 and the conductive layer 24 are processed using the same conductive film. Since the conductive layer 23 and the conductive layer 24 are formed over the entire display region, formation of the conductive layers in the same step can reduce display unevenness.
  • the insulating layer 28 has a function of a dielectric of the capacitor 11 .
  • an inorganic insulating material is used for the insulating layer 28 .
  • the insulating layer 28 is formed using an inorganic insulating material, the insulating layer 28 having a uniform thickness can be formed easily, and furthermore, the insulating layer 28 can be thinner than the case of using an organic insulating material. Therefore, variation in the capacitances of the capacitors 11 can be reduced.
  • the insulating layer 28 can function as an etching stopper at the time of processing the conductive layer 25 .
  • the insulating layer 28 may be formed using an organic insulating material. In this case, a material with low heat resistance can be used for components between the substrate 21 and the insulating layer 28 , and therefore, the range of choices of materials thereof can be expanded.
  • the insulating layer 266 have a function of a planarization layer and be formed using an organic insulating material. Alternatively, an inorganic insulating material having high planarity may be used. A flat surface provided by the insulating layer 266 can reduce a variation in the thickness of the coloring layer 52 . Thus, the touch panel can have high display quality.
  • An EL layer that emits white light is preferably used as the EL layer 222 of the light-emitting element 204 .
  • the light-emitting element 204 it is not necessary to separately form the EL layers 222 expressing different colors in pixels. Therefore, the cost can be reduced, and the high resolution is achieved easily.
  • the thickness of the optical adjustment layer 224 in pixels light with a wavelength suitable for each pixel can be extracted, which increases color purity.
  • the EL layers 222 expressing different colors may be separately formed in pixels, in which case the optical adjustment layer 224 is not necessarily used.
  • FIG. 12A shows a cross-sectional structure of a crossing portion 206 where a wiring formed by processing the conductive film used for forming the gate electrode of the transistor and a wiring formed by processing the conductive film used for forming the source electrode and the drain electrode of the transistor cross each other.
  • connection layer 210 and the connection layer 260 any of various anisotropic conductive films (ACF), anisotropic conductive pastes (ACP), or the like can be used.
  • ACF anisotropic conductive films
  • ACP anisotropic conductive pastes
  • the distance between one of the conductive layer 23 and the conductive layer 24 (or the conductive layer 25 ) which is positioned closer to the display panel (i.e., the substrate side on which the display element is provided) than the other and a conductive layer which is the closest to the one of the conductive layer 23 and the conductive layer 24 (or the conductive layer 25 ) of the conductive layers provided closer to the display panel than the one of the conductive layer 23 and the conductive layer 24 (or the conductive layer 25 ) is preferably greater than or equal to 25 nm and less than or equal to 100 ⁇ m, more preferably greater than or equal to 50 nm and less than or equal to 10 ⁇ m, still more preferably greater than or equal to 50 nm and less than or equal to 5 ⁇ m.
  • an oxide semiconductor film including a plurality of crystal parts whose c-axes are aligned substantially perpendicular to a surface on which the semiconductor layer is formed or the top surface of the semiconductor layer and having no grain boundary between adjacent crystal parts.
  • the use of such an oxide semiconductor for the semiconductor layer makes it possible to provide a highly reliable transistor in which a change in the electrical characteristics is suppressed.
  • silicon is preferably used as a semiconductor in which a channel of a transistor is formed.
  • amorphous silicon may be used as silicon, silicon having crystallinity is particularly preferable.
  • microcrystalline silicon, polycrystalline silicon, single crystal silicon, or the like is preferably used.
  • polycrystalline silicon can be formed at a lower temperature than single crystal silicon and has higher field effect mobility and higher reliability than amorphous silicon.
  • the aperture ratio of the pixel can be improved. Even in the case where pixels are provided at extremely high resolution, a gate driver circuit and a source driver circuit can be formed over a substrate over which the pixels are formed, and the number of components of an electronic appliance can be reduced.
  • an element layer includes a display element, for example, and may include a wiring electrically connected to the display element or an element such as a transistor used in a pixel or a circuit in addition to the display element.
  • a pulse voltage is sequentially applied to the wirings X 1 to X 6 , and the waveforms of the wirings Y 1 to Y 6 change in accordance with the pulse voltage.
  • the waveforms of the wirings Y 1 to Y 6 change in accordance with changes in the voltages of the wirings X 1 to X 6 .
  • the current value is decreased at the point of approach or contact of a sensing target and accordingly the waveform of the voltage value changes.
  • An electronic appliance of one embodiment of the present invention may include a touch panel and a secondary battery. It is preferable that the secondary battery is capable of being charged by contactless power transmission.
  • a lithium ion secondary battery such as a lithium polymer battery (lithium ion polymer battery) using a gel electrolyte, a lithium ion battery, a nickel-hydride battery, a nickel-cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, and a silver-zinc battery can be given.
  • the portable information terminal 7100 is capable of executing a variety of applications such as mobile phone calls, e-mailing, reading and editing texts, music reproduction, Internet communication, and a computer game.
  • the light-emitting portion included in each of the lighting devices 7200 , 7210 , and 7220 are flexible; thus, the light-emitting portion may be fixed on a plastic member, a movable frame, or the like so that an emission surface of the light-emitting portion can be bent freely depending on the intended use.
  • a reinforcement frame may be provided for a side portion of the display portion 7302 so that the display portion 7302 has a flat display surface when pulled out.
  • the touch panel of one embodiment of the present invention can be used for a display portion 358 included in a housing 354 of the portable information terminal 345 .
  • a highly reliable touch panel having a curved display portion can be provided with a high yield.
  • a foldable touch panel of one embodiment of the present invention was fabricated.
  • This example also describes the results of performing evaluation of a time constant and performing a folding test on the touch panel.
  • a separation layer, the passivation layer, the FET layer, and the organic EL element were formed over a glass substrate.
  • the first electrode 221 As a pixel electrode (the first electrode 221 ), alloy containing silver with extremely high reflectivity was used. A transparent electrode layer (the optical adjustment layer 224 ) was formed over the pixel electrode and the thickness thereof varied as appropriate depending on the structure of the sub-pixel to produce a microcavity effect.
  • the two substrates were bonded to each other with the adhesive layer.
  • the distance (cell gap) between the substrates was set to approximately 5 ⁇ m.
  • separation of each substrate was made to occur between the separation layer and the passivation layer, and the flexible substrates were attached.
  • the flexible substrates were plastic substrates each having a thickness of approximately 20 ⁇ m.
  • the pixels are arranged in the openings in the mesh of the touch sensor electrode, providing the touch sensor does not significantly affect the light extraction efficiency.
US14/725,205 2014-05-30 2015-05-29 Touch panel Abandoned US20150346866A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/884,154 US11644869B2 (en) 2014-05-30 2020-05-27 Touch panel comprising conductive layers having opening overlapping with light-emitting element
US18/136,384 US20230376076A1 (en) 2014-05-30 2023-04-19 Touch panel

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2014112316 2014-05-30
JP2014-112316 2014-05-30
JP2014-128409 2014-06-23
JP2014128409 2014-06-23
JP2014-242912 2014-12-01
JP2014242912 2014-12-01

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/884,154 Continuation US11644869B2 (en) 2014-05-30 2020-05-27 Touch panel comprising conductive layers having opening overlapping with light-emitting element

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