WO2011062085A1 - タッチセンサ機能付きフレキシブル表示パネル - Google Patents
タッチセンサ機能付きフレキシブル表示パネル Download PDFInfo
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- WO2011062085A1 WO2011062085A1 PCT/JP2010/069901 JP2010069901W WO2011062085A1 WO 2011062085 A1 WO2011062085 A1 WO 2011062085A1 JP 2010069901 W JP2010069901 W JP 2010069901W WO 2011062085 A1 WO2011062085 A1 WO 2011062085A1
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- display panel
- flexible
- touch sensor
- liquid crystal
- sensor function
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- 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
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
-
- 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
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13398—Spacer materials; Spacer properties
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- 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
- G06F2203/04102—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
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
Definitions
- the present invention relates to a display panel having a touch sensor function and having flexibility.
- Japanese Patent Application Laid-Open No. 2005-18492 describes an information input display device that can be rolled into a cylindrical shape and stored.
- This information input display device includes a flexible image display unit and a flexible two-dimensional pointing position input unit stacked on the surface on the viewer side. It is described that a resistive film type touch panel including a pair of resin films having position detection electrodes formed on opposite surfaces can be used as a flexible two-dimensional pointing position input unit. Moreover, it is described that a liquid crystal display device, an EL (Electro Luminescence) display device, an electronic paper display device, or the like can be used as the flexible image display unit.
- EL Electro Luminescence
- Japanese Patent Application Laid-Open No. 2006-227249 describes a flexible microcapsule type electrophoresis display panel that can be used as electronic paper.
- the display panel includes a pair of flexible substrates and an electrophoretic layer sandwiched between the pair of substrates. Electrodes are formed on the surfaces of the pair of substrates facing each other.
- the electrophoretic layer is composed of a large number of microcapsules enclosing a dispersion medium in which charged particles of one or a plurality of colors are dispersed.
- Desired display can be performed by controlling the electric field applied to the electrophoretic layer for each pixel.
- An object of the present invention is to solve the above-mentioned conventional problems and to provide a display panel having a touch sensor function, a thin and high flexibility.
- the flexible display panel with a touch sensor function includes a plurality of pixel electrodes arranged in a matrix, a counter electrode facing the plurality of pixel electrodes, and the plurality of pixel electrodes and the counter electrodes.
- a display panel that performs a desired display by controlling the potential of each of the plurality of pixel electrodes with respect to the counter electrode.
- a pressure-sensitive conductive resin whose electric resistance value changes in accordance with an applied compressive force is disposed, and a change in a distance between the pair of flexible substrates caused by a pressing force applied to one of the pair of flexible substrates. Is detected based on the value of the current flowing through the pressure-sensitive conductive resin.
- FIG. 1 is a plan view showing a schematic configuration of a liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view illustrating a schematic configuration of the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 3 is a plan perspective view of one pixel of the active substrate of the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 4 is an equivalent circuit diagram of one pixel of the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 1 is a plan view showing a schematic configuration of a liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view illustrating a schematic configuration of the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 3 is a plan perspective view of one pixel of the
- FIG. 5A is a cross-sectional view showing one step in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 5B is a cross-sectional view showing one step in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 5C is a cross-sectional view showing one process in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 5D is a cross-sectional view showing one step in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 5A is a cross-sectional view showing one step in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 5B is a cross-sectional view showing one step in manufacturing an active substrate constitu
- FIG. 5E is a cross-sectional view showing one step in manufacturing the active substrate constituting the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 5F is a cross-sectional view showing one process in manufacturing an active substrate constituting the liquid crystal display panel with a touch sensor function according to the first embodiment of the present invention.
- FIG. 6A is a schematic diagram showing a method for applying a pressure-sensitive conductive resin on an electrode pad of an active substrate by an offset printing method in Embodiment 1 of the present invention.
- FIG. 6B is a schematic view showing a method for applying a pressure-sensitive conductive resin onto an electrode pad of an active substrate by inkjet printing in Embodiment 1 of the present invention.
- FIG. 7A is a cross-sectional view showing one step in manufacturing the counter substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 7B is a cross-sectional view showing one step in manufacturing the counter substrate that constitutes the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 7C is a cross-sectional view showing one step in manufacturing the counter substrate constituting the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 8A is a cross-sectional view showing a process of bonding an active substrate and a counter substrate that constitute the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 8A is a cross-sectional view showing a process of bonding an active substrate and a counter substrate that constitute the liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 8B is a cross-sectional view illustrating a process of peeling a glass substrate as a support substrate bonded to an active substrate and a counter substrate in the method for manufacturing a liquid crystal display panel with a touch sensor function according to Embodiment 1 of the present invention.
- FIG. 9 is a cross-sectional view illustrating a schematic configuration of a liquid crystal display panel with a touch sensor function according to the second embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing a schematic configuration of an electrophoretic display panel with a touch sensor function according to Embodiment 3 of the present invention.
- FIG. 11 is a cross-sectional view showing a schematic configuration of an organic EL display panel with a touch sensor function according to Embodiment 4 of the present invention.
- a flexible display panel with a touch sensor function includes a plurality of pixel electrodes arranged in a matrix, a counter electrode facing the plurality of pixel electrodes, the plurality of pixel electrodes, And a pair of flexible substrates opposed to each other with the counter electrode interposed therebetween, wherein the display panel performs a desired display by controlling each potential of the plurality of pixel electrodes with respect to the counter electrode.
- a pressure-sensitive conductive resin whose electric resistance value changes according to an applied compressive force is disposed between the flexible substrates, and the pair of flexible substrates generated by a pressing force applied to one of the pair of flexible substrates A change in the distance between the substrates is detected based on the value of the current flowing through the pressure-sensitive conductive resin (first configuration).
- a touch sensor is configured using a pressure-sensitive conductive resin disposed between a pair of flexible substrates
- a display panel in which the touch sensor is in-celled between the pair of flexible substrates is realized. be able to.
- the thickness of the display panel is not substantially increased. Therefore, a thin display panel having a touch sensor function and having high flexibility can be realized.
- the pressure-sensitive conductive resin is preferably arranged in a matrix (second configuration). This makes it possible to detect the touch position in the two-dimensional plane.
- the pressure-sensitive conductive resin bonds a pair of flexible substrates (third configuration). Since the pressure-sensitive conductive resin has such an “adhesion function”, when the display panel is bent or bent, the pair of flexible substrates is peeled off, or one of the pair of flexible substrates is the other. Can be prevented from being displaced. Therefore, high display quality can be maintained without deterioration.
- the “adhesion” between the pressure-sensitive conductive resin and the flexible substrate is not limited to the case where the pressure-sensitive conductive resin is in direct contact with and adheres to the flexible substrate, and the pressure-sensitive conductive resin passes through another layer. This includes cases where it is indirectly bonded to a flexible substrate.
- the pressure-sensitive conductive resin maintains a distance between the pair of flexible substrates at a predetermined value (fourth configuration). Since the pressure-sensitive conductive resin has such a “spacer function”, it is possible to prevent the distance between the pair of flexible substrates from being reduced when the display panel is bent or bent. Therefore, high display quality can be maintained without deterioration. In addition, a spacer that is generally used to keep the distance between the pair of flexible substrates constant can be omitted. As a result, a process for forming the spacer becomes unnecessary.
- the image display method of the display panel according to an embodiment of the present invention is not particularly limited, and can be applied to various display panels such as a reflective type, a transmissive type, and a self-luminous type.
- the display panel according to an embodiment of the present invention may be a liquid crystal display panel.
- the liquid crystal display panel may be a reflective type (fifth configuration), a transmissive type (sixth configuration), or a transflective type.
- a transmissive liquid crystal display panel (fifth configuration) or a transflective liquid crystal display panel one flexible substrate of the pair of flexible substrates is on the side opposite to the other flexible substrate, A lighting device having flexibility is preferably provided (seventh configuration).
- the liquid crystal provided between the plurality of pixel electrodes and the counter electrode has fluidity such as twist nematic or super twist nematic.
- it may be a liquid crystal, it is preferably a polymer-dispersed liquid crystal (eighth configuration).
- a polymer dispersed liquid crystal By using a polymer dispersed liquid crystal, a polarizing plate becomes unnecessary. As a result, bright display with a wide viewing angle becomes possible.
- the display panel can be thinned. Furthermore, an alignment film is also unnecessary.
- polymer-dispersed liquid crystal polymer network liquid crystal or guest-host liquid crystal can be used.
- the display panel according to the embodiment of the present invention may be an electrophoretic display panel or an organic EL display panel (ninth and tenth configurations).
- Embodiment 1 shows an example in which the present invention is applied to a reflective liquid crystal display panel using a polymer dispersed liquid crystal.
- FIG. 1 is a plan view showing a schematic configuration of a liquid crystal display panel 1 with a touch sensor function according to the first embodiment.
- the liquid crystal display panel 1 includes a display area 11 in which a large number of picture elements are arranged in a matrix and a frame area 12 around the display area 11.
- a gate driver 13 and the source driver 14 can be made monolithic by being composed of thin film transistors (Thin Film Transistors: TFTs) using polysilicon (p-Si) or microcrystalline silicon ( ⁇ -Si). Therefore, by using a flexible sheet (for example, a resin sheet) as the substrate, for example, a wide area surrounded by the dotted frame 16 has good flexibility.
- the flexible region is not limited to the region surrounded by the dotted line frame 16 and can be set to a desired range by appropriately changing the configuration of the substrate.
- FIG. 2 is a cross-sectional view showing a schematic configuration of the liquid crystal display panel 1 according to Embodiment 1 of the present invention.
- the display panel 1 includes an active substrate 20 and a counter substrate 30 that are arranged to face each other, and a liquid crystal layer 40 that is sandwiched between the active substrate 20 and the counter substrate 30.
- the surface of the counter substrate 30 opposite to the active substrate 20 is a display surface, and is a touch surface that is touched by a finger or the like.
- the active substrate 20 includes a first flexible substrate 21 having flexibility.
- a base coat layer 22, a gate insulating film 23, an interlayer insulating film 24, and a planarizing film 25 are stacked in this order on the surface of the first flexible substrate 21 on the counter substrate 30 side.
- a pixel electrode 46 and an electrode pad 47 are formed on the planarizing film 25.
- a picture element TFT 41 for picture element driving and a sensor TFT 42 for touch detection are formed between the base coat layer 22 and the interlayer insulating film 24, a picture element TFT 41 for picture element driving and a sensor TFT 42 for touch detection are formed.
- the pixel TFT 41 is connected to the pixel electrode 46.
- the pixel TFT 41 functions as a switching element that switches the potential of the pixel electrode 46.
- the sensor TFT 42 is connected to the electrode pad 47.
- the first flexible substrate 21 can be made of, for example, a colorless and transparent resin film. Although there is no restriction
- the thickness of the first flexible substrate 21 is not particularly limited, but can be set to 8 to 20 ⁇ m, for example.
- the planarizing film 25 can be omitted.
- the pixel electrode 46 and the electrode pad 47 are formed on the interlayer insulating film 24.
- the counter substrate 30 includes a flexible second flexible substrate 31.
- a protective film 32, a color filter layer 33, a transparent layer 34, and a counter electrode 35 are formed in this order on the surface of the counter substrate 30 on the active substrate 20 side.
- the protective film 32 can be omitted.
- the second flexible substrate 31 can be made of, for example, a colorless and transparent resin film.
- the material of the second flexible substrate 31 is not particularly limited, and for example, a polyimide resin, a polyester resin (for example, polyethylene naphthalate), or the like can be used.
- the thickness of the second flexible substrate 31 is not particularly limited, but can be set to 8 to 20 ⁇ m, for example.
- the color filter layer 33 includes three types of color layers that selectively transmit light in the wavelength bands of the primary colors of red (R), green (G), and blue (B), and black disposed between adjacent color layers. It consists of a matrix. Each color layer is made of a resin film.
- the black matrix is a light shielding film formed of a metal such as Cr (chromium) or a black resin. A black matrix is formed in a region where a pressure sensitive conductive resin 48 described later is formed.
- the counter electrode 35 is continuously formed in a region facing the region (the display region 11 in FIG. 1) where the pixel electrode 46 of the active substrate 20 is formed.
- a pressure-sensitive conductive resin 48 is provided so as to connect the electrode pad 47 on the active substrate 20 and the counter electrode 35 on the counter substrate 30.
- the pressure-sensitive conductive resin 48 constitutes a sensor unit that exhibits a touch sensor function for detecting that a finger or a touch pen touches the display panel 1.
- the pressure-sensitive conductive resin 48 is bonded to the active substrate 20 and the counter substrate 30 and has an adhesive function for connecting the active substrate 20 and the counter substrate 30.
- the pressure-sensitive conductive resin 48 has a spacer function for maintaining the distance (cell gap) between the active substrate 20 and the counter substrate 30 at a predetermined constant value.
- the electric resistance value of the pressure-sensitive conductive resin 48 changes according to the pressing force (compression force) applied to the pressure-sensitive conductive resin 48.
- the electrical resistance value of the pressure-sensitive conductive resin 48 is preferably set to 1 ⁇ 10 7 ⁇ or more when the pressing force is zero, and 1 ⁇ 10 4 ⁇ or less when the pressing force is 1 kgf (9.8 N). .
- the pressing force applied to the pressure-sensitive conductive resin 48 that is, the display panel 1 is applied.
- the applied pressing force (touch pressure) is detected.
- the pressure-sensitive conductive resin 48 a material in which conductive particles are contained as a filler in a base resin can be used.
- a base resin an elastic resin such as silicone, urethane, or polyimide can be used. Of these resins having elasticity, silicone is preferable.
- conductive particles nanoparticles such as carbon, Ag, and Ni can be used. Among these nanoparticles, Ag is preferable because a highly sensitive pressure sensor can be realized.
- the elastic modulus of the pressure-sensitive conductive resin 48 is preferably 500 MPa or less. If the elastic modulus is greater than 500 MPa, the amount of deformation of the pressure-sensitive conductive resin 48 with respect to the pressing force is small, so that the change in electrical resistance value is small. As a result, the sensitivity as a touch sensor decreases.
- the adhesion strength of the pressure-sensitive conductive resin 48 to the electrode pad 47 and the counter electrode 35 is preferably 1 MPa or more.
- the adhesive strength is less than 1 MPa, the pressure-sensitive conductive resin 48 is easily peeled off from the electrode pad 47 or the counter electrode 35 when a force is applied to the active substrate 20 or the counter substrate 30 to increase the distance between the two. Become. As a result, the adhesion function of the pressure-sensitive conductive resin 48 is lowered.
- the liquid crystal layer 40 includes a polymer network liquid crystal (PNLC: Polymer Network Liquid Crystal) in which a liquid crystal is contained in a polymer network.
- PNLC Polymer Network Liquid Crystal
- the liquid crystal molecules are irregularly aligned along the polymer fibers of the polymer network, so that an opaque display is obtained.
- the liquid crystal molecules are aligned in the thickness direction (direction perpendicular to the active substrate 20 and the counter substrate 30), so that a transparent display can be obtained.
- the material of the polymer network liquid crystal is not particularly limited, and for example, a known material (for example, JP-A-5-281521) can be used.
- a polymer network can be formed by mixing a liquid crystal and a photopolymerization initiator in a polymerizable monomer and irradiating it with ultraviolet rays.
- the polymerization method is not limited to photopolymerization, and a known method such as thermal polymerization or plasma polymerization can be used.
- the thickness of the liquid crystal layer 40 (the interval between the active substrate 20 and the counter substrate 30, that is, the cell gap) is not particularly limited, but can be set to, for example, about 5 ⁇ m.
- FIG. 3 shows a perspective plan view of one pixel of the active substrate 20.
- FIG. 4 shows an equivalent circuit diagram for one pixel of the display panel 1 of the present embodiment.
- One pixel is composed of picture elements of three colors of red (R), green (G), and blue (B). 3 and 4, the suffixes R, G, and B attached to the symbols mean that they correspond to red, green, and blue colors.
- the auxiliary capacitance line CsL, the gate line (scanning line) GL, and the sensor line SenL are extended in the horizontal direction, and these are repeatedly arranged in the vertical direction.
- the auxiliary capacitance line CsL, the gate line GL, and the sensor line SenL are connected to the gate driver 13 (see FIG. 1).
- source lines (signal lines) SLR, SLG, and SLB are extended in the vertical direction, and these are repeatedly arranged in the horizontal direction.
- the source lines SLR, SLG, and SLB are connected to the source driver 14 (see FIG. 1).
- a picture element having a color of red (R), green (G), or blue (B) is formed at each intersection position of the gate line GL and any of the source lines SLR, SLG, and SLB.
- Each pixel includes a pixel TFT (41R, 41G, or 41B), a liquid crystal element (40R, 40G, or 40B), and a capacitance (CsR, CsG, or CsB).
- each of the liquid crystal elements 40R, 40G, and 40B includes the pixel electrode 46, the counter electrode 35, and the liquid crystal layer 40 illustrated in FIG.
- the source regions of the pixel TFTs 41R, 41G, and 41B are connected to the source lines SLR, SLG, and SLB.
- the gate electrodes of the pixel TFTs 41R, 41G, and 41B are connected to the gate line GL.
- the drain regions of the pixel TFTs 41R, 41G, and 41B are connected to the pixel electrodes 46R, 46G, and 46B of the liquid crystal elements 40R, 40G, and 40B and one of the capacitances CsR, CsG, and CsB.
- the other electrodes of the capacitances CsR, CsG, and CsB are connected to the auxiliary capacitance line CsL.
- the sensor unit that exhibits the touch sensor function includes a sensor TFT 42, an electrode pad 47 (see FIG. 2), a pressure-sensitive conductive resin 48, and a sensor line SenL.
- a sensor TFT 42 an electrode pad 47 (see FIG. 2), a pressure-sensitive conductive resin 48, and a sensor line SenL.
- one sensor unit is arranged for each pixel. Specifically, the source region of the sensor TFT 42 is connected to the electrode pad 47. The gate electrode of the sensor TFT 42 is connected to the sensor line SenL. The drain region of the sensor TFT 42 is connected to the source line SLG.
- reference numeral 49 is a spacer.
- the spacer 49 is formed at a position where the storage capacitor line CsL and the source line SLB intersect.
- the spacer 49 is sandwiched between the active substrate 20 and the counter substrate 30 and is used for maintaining the distance between the active substrate 20 and the counter substrate 30 (the thickness of the liquid crystal layer 40, that is, the cell gap) not to be a predetermined value or less.
- the configuration and formation method of the spacer 49 are not particularly limited.
- the spacer 49 may have a conventionally known configuration.
- the spacer 49 may be formed by a conventionally known method. Note that the function of the spacer 49 may be assigned to the pressure-sensitive conductive resin 48, and the spacer 49 may be omitted.
- the display operation will be explained.
- a positive pulse is applied to the gate line GL
- the pixel TFTs 41R, 41G, and 41B connected to the gate line are turned on.
- the signal voltage applied to the source lines SLR, SLG, and SLB passes from the source electrode of the pixel TFTs 41R, 41G, and 41B to the drain electrode, and then the liquid crystal elements 40R, 40G, and 40B and the capacitances CsR, CsG, Sent to CsB.
- an electric field is applied to the liquid crystal layer 40 (see FIG. 2) by the pixel electrodes 46R, 46G, and 46B of the liquid crystal elements 40R, 40G, and 40B and the counter electrode 35 (see FIG. 2).
- the external light L1 passes through the counter substrate 30 and the liquid crystal layer 40 and is reflected by the picture element electrode 46, and again, the liquid crystal layer 40 and the counter substrate 30. And exits from the liquid crystal display panel 1.
- the external light L1 is absorbed by the liquid crystal layer 40 after passing through the counter substrate 30.
- a desired color image can be displayed by sequentially changing (scanning) the gate line GL to which the positive pulse is applied.
- the contact position in the extending direction of the sensor line SenL can be detected. Further, the contact position in the extending direction of the source line SLG can be detected from the position of the sensor line SenL to which the positive pulse is applied. By sequentially changing (scanning) the sensor line SenL to which the positive pulse is applied, it is possible to detect the presence / absence of contact and the contact position in the display area 11.
- the active substrate 20 and the counter substrate 30 are separately formed, then the active substrate 20 and the counter substrate 30 are bonded together, and liquid crystal is sealed between the active substrate 20 and the counter substrate 30. Can be obtained.
- a glass substrate 51 having a thickness of about 0.7 mm is prepared as a support substrate.
- the first flexible substrate 21 is laminated on the glass substrate 51.
- a polyimide resin for example, a solution of polyamic acid, which is a polyimide precursor, is applied on the glass substrate 51 and dried, and then imidized to form the first flexible substrate 21. Can be formed.
- a polyester-type resin as the 1st flexible substrate 21
- seat of the polyester-type resin of the predetermined thickness produced separately is laminated
- the base coat layer 22 is formed on the first flexible substrate 21 by using, for example, a plasma CVD method.
- a plasma CVD method As the material of the base coat layer 22, SiO 2 , SiN, or the like can be used.
- the thickness of the base coat layer 22 can be about 500 nm, for example.
- the base coat layer 22 may be a single layer or a multilayer composed of different materials.
- an amorphous semiconductor film is formed on the entire surface of the base coat layer 22.
- silicon can be preferably used, but other semiconductors such as Ge, SiGe, a compound semiconductor, and chalcogenide can also be used.
- the amorphous silicon film can be formed with a thickness of, for example, about 25 to 100 nm using a known method such as a plasma CVD method or a sputtering method.
- the amorphous silicon film is crystallized by irradiating laser light to form a polycrystalline silicon film.
- unnecessary regions of the polycrystalline silicon film are removed and element isolation is performed to obtain semiconductor layers 61a and 61b as shown in FIG. 5B.
- the gate electrode 62a of the pixel TFT 41 and the gate of the sensor TFT 42 are formed on the gate insulating film 23.
- the electrode 62b is formed.
- the gate insulating film 23 As a material of the gate insulating film 23, for example, SiO 2 or SiN can be used.
- the thickness of the gate insulating film 23 is preferably 20 to 150 nm.
- the gate electrodes 62a and 62b can be formed by depositing a conductive film on the entire surface of the gate insulating film 23 using a sputtering method or a CVD method, and patterning the conductive film.
- a material for the conductive film W, Ta, Ti, Mo, which is a refractory metal, or an alloy material thereof can be used.
- the thickness of the conductive film is preferably 300 to 600 nm.
- n-type impurities for example, phosphorus
- the n-type impurity passes through the gate insulating film 23 and is injected into the semiconductor layers 61a and 61b.
- the regions into which the n-type impurity has been implanted become the source and drain regions of the TFTs 41 and 42.
- the region that is masked by the gate electrodes 62a and 62b and is not implanted with n-type impurities becomes the channel region of the TFTs 41 and 42.
- an interlayer insulating film 24 is formed on the entire surface of the gate insulating film 23.
- the interlayer insulating film 24 for example, a TEOS film or a SiN film can be used. Thereafter, contact holes are formed in the interlayer insulating film 24, and metal wirings 63 electrically connected to the source and drain regions of the TFTs 41 and 42 are formed.
- a planarizing film 25 is formed on the entire surface of the interlayer insulating film 24.
- the planarizing film 25 for example, a TEOS film, a SiN film, or the like can be used as in the interlayer insulating film 24.
- a contact hole is formed in the planarizing film 25, and a pixel electrode 46 and an electrode pad 47 electrically connected to the metal wiring 63 are formed.
- the active substrate 20 is obtained.
- a pressure-sensitive conductive resin 48 is formed on the electrode pad 47 so as to rise.
- the method for applying the pressure-sensitive conductive resin 48 onto the electrode pad 47 is not particularly limited, and can be appropriately selected in consideration of the physical properties of the pressure-sensitive conductive resin 48 and the like. A method in which the pressure-sensitive conductive resin can be applied to the predetermined height by a predetermined amount without being displaced on the electrode pad 47 is preferable.
- a pressure-sensitive conductive resin 48 may be applied on the electrode pad 47 by an offset printing method. That is, a certain amount of the pressure-sensitive conductive resin material 70 is held in the recess 71 a formed in a predetermined pattern on the outer peripheral surface of the rotating gravure roller 71 using the scraper 72. The pressure-sensitive conductive resin material 70 in the recess 71 a is transferred to the outer peripheral surface of the blanket roller 73 and further transferred onto the electrode pad 47 of the active substrate 20.
- a pressure-sensitive conductive resin 48 may be applied on the electrode pad 47 by an ink jet printing method. That is, the pressure-sensitive conductive resin material 76 is ejected from the inkjet nozzle 75 in the form of droplets and applied onto the electrode pads 47 of the active substrate 20. At this time, the active substrate 20 may be printed while being stationary, or may be printed while being moved.
- a screen printing method, a gravure printing method, or the like may be used.
- heat treatment temporary firing
- 100 to 120 ° C. for several minutes for example.
- a glass substrate 52 having a thickness of about 0.7 mm is prepared as a support substrate.
- the second flexible substrate 31 is laminated on the glass substrate 52.
- a polyimide resin for example, a solution of polyamic acid, which is a polyimide precursor, is applied on the glass substrate 52 and dried, and then imidized to form the second flexible substrate 31. Can be formed.
- a polyester resin is used as the second flexible substrate 31, a separately prepared polyester resin sheet having a predetermined thickness is laminated on the glass substrate 52 via an adhesive layer.
- the protective film 32 is formed on the second flexible substrate 31 by using, for example, a plasma CVD method.
- a material of the protective film 32 SiO 2 , SiON, SiNx, or the like can be used.
- the thickness of the protective film 32 can be about 500 nm, for example.
- a color filter layer 33 is formed on the protective film 32.
- a black matrix is formed on the protective film 32 in a predetermined pattern.
- red, green, and blue color layers are formed in the black matrix non-formation region.
- a transparent layer 34 is formed on the color filter layer 33.
- a material of the transparent layer 34 for example, an acrylic resin, SiO 2 or the like can be used.
- the thickness of the transparent layer 34 can be set to about 1 to 3 ⁇ m, for example.
- the counter electrode 35 is formed on the transparent layer 34.
- a transparent conductor such as ITO (indium-tin oxide) or IZO (indium-zinc oxide) can be employed.
- the counter electrode 35 can be formed by a sputtering method.
- the active substrate 20 obtained in FIG. 5F and the counter substrate 30 obtained in FIG. 7C are the surfaces on which the pixel electrodes 46 and the electrode pads 47 of the active substrate 20 are formed. And the surface of the counter substrate 30 on which the counter electrode 35 is formed are attached to face each other.
- a frame-shaped sealing material provided with an opening is formed around the bonding surface of the active substrate 20 or the counter substrate 30. By the bonding, the sealing material is in close contact with the active substrate 20 and the counter substrate 30, and the pressure-sensitive conductive resin 48 is in close contact with the counter electrode 35.
- a mixed liquid composed of an ultraviolet curable resin liquid, a photopolymerization initiator, and liquid crystal is injected through the opening of the sealing material to seal the opening. Then, ultraviolet rays are irradiated from the outside. Upon irradiation with ultraviolet rays, the resin undergoes a photopolymerization reaction to form a polymer network, and the liquid crystal is phase-separated and dispersed in the polymer network.
- heat treatment main baking
- the sealing material and the pressure-sensitive conductive resin 48 are bonded to the active substrate 20 and the counter substrate 30.
- the glass substrates 51 and 52 are peeled off and removed from the active substrate 20 and the counter substrate 30 by irradiating laser light 55 from the outer surfaces of the glass substrates 51 and 52.
- the removal method of the glass substrates 51 and 52 is not limited to peeling by laser beam irradiation, For example, you may grind and remove the glass substrates 51 and 52 using a grinding
- liquid crystal display panel 1 of Embodiment 1 is obtained.
- the pressure-sensitive conductive resin 48 for exhibiting the touch sensor function is arranged in the liquid crystal layer 40. That is, the touch sensor is in-celled between the flexible substrates 21 and 31. Therefore, the touch sensor function can be provided with almost the same thickness (for example, about 50 ⁇ m) as a flexible reflective liquid crystal display panel using a conventional polymer network liquid crystal. Therefore, it has high flexibility, and can be rolled or folded, for example, in a cylindrical shape, thereby improving portability.
- the pressure-sensitive conductive resin 48 is a bonding function for bonding the active substrate 20 and the counter substrate 30, and a spacer function for maintaining a substantially constant distance (cell gap) between the active substrate 20 and the counter substrate 30. It also has. Therefore, even if the liquid crystal display panel 1 is bent, the active substrate 20 and the counter substrate 30 are not displaced. Further, the thickness (cell gap) of the liquid crystal layer 40 is maintained almost constant with almost no change. Therefore, high display quality can be stably obtained. Furthermore, if the elastic modulus and arrangement density of the pressure-sensitive conductive resin 48 are appropriately set, the spacer function (spacer 49 in FIG. 3) is assigned to the pressure-sensitive conductive resin 48, and the spacer may be omitted. Is possible.
- the configuration of the liquid crystal display panel 1 according to the first embodiment is not particularly limited except for a sensor unit including a sensor TFT 42, an electrode pad 47, a pressure-sensitive conductive resin 48, a sensor line SenL, and the like.
- a reflective display panel using a polymer network type liquid crystal may be used.
- a liquid crystal display with a touch sensor function can be obtained by making only a slight design change by adding the above-described sensor unit to a reflective liquid crystal display panel having a conventionally known flexibility using a polymer network type liquid crystal.
- a panel can be realized.
- the flexibility of the liquid crystal display panel hardly changes.
- the addition / change of the manufacturing process by adding a sensor part is few.
- a liquid crystal display panel with a touch sensor function can be manufactured without significantly changing the conventional manufacturing process of a liquid crystal display panel having flexibility.
- the 1st, 2nd flexible substrates 21 and 22 are supported by the glass substrates 51 and 52, even if it uses a thin sheet
- the handling properties (handleability) of the first and second flexible substrates 21 and 22 are not deteriorated. In other words, it is not necessary to increase the thickness of the first and second flexible substrates 21 and 22 in order to ensure the handling properties of the first and second flexible substrates 21 and 22 in the manufacturing process. Accordingly, a thin liquid crystal display panel with a touch sensor function having high flexibility can be realized.
- one pressure-sensitive conductive resin 48 is provided for one pixel composed of three colors of red, green, and blue, but the present invention is not limited to this.
- one pressure-sensitive conductive resin 48 may be provided for a plurality of pixels.
- one pressure-sensitive conductive resin 48 may be provided for each of the red, green, and blue picture elements.
- an example in which the present invention is applied to a liquid crystal panel that performs color display has been described.
- the present invention can also be applied to a liquid crystal panel that performs monochrome display.
- FIG. 9 is a cross-sectional view showing a schematic configuration of the liquid crystal display panel 2 with a touch sensor function according to the second embodiment.
- Components corresponding to the components shown in FIG. 2 showing the liquid crystal display panel 1 of Embodiment 1 are given the same reference numerals, and descriptions thereof are omitted.
- the display panel 2 according to the second embodiment is sandwiched between the active substrate 20 and the counter substrate 30 that are arranged to face each other, and the active substrate 20 and the counter substrate 30.
- the liquid crystal layer 40 is provided.
- the display panel 2 further includes a flexible backlight (illumination device) 55 in close contact with the active substrate 20 on the side opposite to the liquid crystal layer 40 of the active substrate 20.
- the surface of the counter substrate 30 opposite to the active substrate 20 is a display surface, and is a touch surface that is touched by a finger or the like.
- the configuration of the flexible backlight 55 is not particularly limited.
- an edge light type including a light guide plate, an optical sheet laminated on one main surface of the light guide plate, and a light source disposed on one side surface of the light guide plate.
- a lighting device can be used.
- the light guide plate has flexibility and translucency, and can be made of, for example, a silicone resin. Concavities and convexities may be formed on the surface of the light guide plate on the active substrate 20 side in order to improve the light emission efficiency or to diffuse the light.
- the optical sheet is for adjusting the optical characteristics of the light emitted from the light guide plate, and is disposed between the light guide plate and the active substrate 20.
- the optical sheet has flexibility, and can be composed of, for example, a diffusion sheet and a prism sheet.
- the light source for example, a cold / hot cathode tube or an LED can be used.
- the light emitted from the light source is guided to the light guide plate, passes through the optical sheet, and illuminates the active substrate 20.
- the illumination light L2 from the flexible backlight 55 passes through the active substrate 20, the liquid crystal layer 40, and the counter substrate 30 in this order and is visually recognized by an observer.
- the pixel electrode 46 and the like are formed of a light-transmitting material in order to allow illumination light to pass through.
- a pressure-sensitive conductive resin 48 for exhibiting a touch sensor function is disposed in the liquid crystal layer 40 as in the liquid crystal display panel 1 of the first embodiment.
- the flexible backlight 55 has flexibility. Accordingly, the touch sensor function can be provided with almost the same thickness as a flexible transmissive liquid crystal display panel using a conventional polymer network liquid crystal. Therefore, it has high flexibility, and can be rolled or folded into a cylindrical shape, for example.
- the configuration of the liquid crystal display panel 2 is not particularly limited except for a sensor unit that exhibits a touch sensor function, and may be the same as a transmissive display panel using a conventionally known polymer network type liquid crystal, for example.
- a liquid crystal display panel with a touch sensor function can be obtained by making a slight design change, for example, by adding a sensor unit to a transmissive liquid crystal display panel having a conventionally known flexibility using a polymer network type liquid crystal. realizable.
- the sensor unit By adding the sensor unit, the flexibility of the liquid crystal display panel hardly changes.
- the addition / change of the manufacturing process by adding a sensor part is few.
- a liquid crystal display panel with a touch sensor function can be manufactured without significantly changing the conventional manufacturing process of a liquid crystal display panel having flexibility.
- Embodiment 3 In Embodiment 3, an example in which the present invention is applied to an electrophoretic display panel will be described.
- the configuration of the electrophoretic display panel is substantially the same as the configuration using an electrophoretic layer containing charged particles in place of the liquid crystal layer 40 in the liquid crystal display panel 1 described in the first embodiment.
- the overall configuration of the display panel according to the third embodiment is substantially the same as that of FIG. 1 described in the first embodiment.
- the first electrophoretic particles may include carbon black that is a black pigment
- the second electrophoretic particles may include titanium dioxide that is a white pigment.
- the first electrophoretic particles and the second electrophoretic particles are dispersed in the dispersion medium, and move in the dispersion medium by electrophoresis in accordance with an electric field.
- the potential of the pixel electrode 346 is made lower than the potential of the counter electrode 335, the first electrophoretic particles and the second electrophoretic particles move in the opposite direction to the above in the microcapsule 341 (electrophoresis).
- the picture element provided with the picture element electrode 346 is displayed in white.
- the circuit configuration for performing the above display operation is not particularly limited, and may be the same as, for example, a known electrophoretic display panel.
- the sensor unit that exhibits the touch sensor function includes the sensor TFT 42, the electrode pad 47, and the pressure-sensitive conductive resin 48, as in the first embodiment.
- the circuit configuration of the sensor unit can be configured in the same manner as in the first embodiment. That is, the source region of the sensor TFT 42 is connected to the electrode pad 47.
- the gate electrode of the sensor TFT 42 is connected to a sensor line (see the sensor line SenL in FIGS. 2 and 3) extending in the horizontal direction in the display area of the display panel 3.
- the drain region of the sensor TFT 42 is connected to wiring extending in the vertical direction in the display region.
- the operation as a touch sensor can be performed in the same manner as in the first embodiment, and the presence / absence of contact and the contact position in the display area can be detected in the same manner as in the first embodiment.
- the display panel 3 of the present embodiment creates the active substrate 320 and the counter substrate 330 separately, and then the active substrate 20 and the counter substrate with the electrophoretic layer 340 interposed therebetween. It can be obtained by pasting 30 together.
- a pressure-sensitive conductive resin 48 for exhibiting a touch sensor function is disposed in the electrophoretic layer 340.
- the touch sensor function can be provided with almost the same thickness as that of a conventional electrophoretic flexible display panel. Therefore, it has high flexibility, and can be rolled or folded into a cylindrical shape, for example.
- the pressure-sensitive conductive resin 48 is a bonding function for bonding the active substrate 320 and the counter substrate 330, and a spacer function for maintaining the distance (cell gap) between the active substrate 320 and the counter substrate 330 substantially constant. It also has. Therefore, even if the display panel 3 is bent, the active substrate 320 and the counter substrate 330 are not displaced. Further, the thickness (cell gap) of the electrophoretic layer 340 is maintained almost constant with almost no change. Therefore, high display quality can be stably obtained. Furthermore, if the elastic modulus and arrangement density of the pressure-sensitive conductive resin 48 are appropriately set, the spacer function (see the spacer 49 in FIG. 3) is assigned to the pressure-sensitive conductive resin 48 and the spacer is omitted. It is also possible.
- the configuration of the display panel 3 is not particularly limited except for a sensor unit that exhibits a touch sensor function, and may be the same as a conventionally known electrophoresis display panel, for example.
- a display panel with a touch sensor function can be realized only by making a slight design change such as adding a sensor unit to an electrophoretic display panel having a conventionally known flexibility.
- the flexibility of the display panel hardly changes.
- the addition / change of the manufacturing process by adding a sensor part is few.
- a display panel with a touch sensor function can be manufactured without significantly changing the conventional manufacturing process of an electrophoretic display panel having flexibility.
- the microcapsule type electrophoresis method using the microcapsules in which the electrophoretic particles are encapsulated is shown.
- the vertical type in which the electrophoretic particles move in the thickness direction in the electrophoretic layer or the electrophoretic particles is applied to an electrophoretic display panel other than a microcapsule type, such as a horizontal type (in-plane type) that moves an electrophoretic layer in a horizontal direction (a direction parallel to the active substrate 20 and the counter substrate 30). You can also.
- FIG. 11 is a cross-sectional view showing a schematic configuration of the organic EL display panel 4 with a touch sensor function according to the fourth embodiment.
- Components corresponding to those shown in FIG. 2 showing the liquid crystal display panel 1 of Embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
- a first flexible substrate 421 and a second flexible substrate 431 each having flexibility are arranged to face each other.
- the surface of the second flexible substrate 431 opposite to the first flexible substrate 421 is a display surface, and is a touch surface that is touched by a finger or the like.
- a base coat layer 422, a gate insulating film 423, an interlayer insulating film 424, and a planarizing film 425 are laminated in this order on the surface of the first flexible substrate 421 on the second flexible substrate 431 side.
- a pixel electrode 446 and an electrode pad 47 are formed on the planarizing film 425.
- a pixel driving TFT 441 and a touch detection sensor TFT 42 are formed between the base coat layer 422 and the interlayer insulating film 424.
- the pixel TFT 441 is connected to the pixel electrode 446.
- the pixel TFT 441 functions as a switching element that switches the potential of the pixel electrode 446.
- the sensor TFT 42 is connected to the electrode pad 47.
- the pixel electrodes 446 and the electrode pads 47 are arranged in a matrix in the display area of the display panel 4 (see the display area 11 in FIG. 1).
- a bank layer 426 is formed in a region of the planarizing film 425 where the pixel electrode 446 and the electrode pad 47 are not formed.
- the bank layer 426 can be formed using an insulating material such as polyimide or acrylic resin.
- the bank layer 426 is not limited thereto, and for example, a known configuration can be used as the bank layer of the organic EL display panel.
- An organic EL layer 440 is formed on the pixel electrode 446.
- the organic EL layer 440 may have an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer in this order from the pixel electrode 446 side.
- a pressure sensitive conductive resin 48 is formed on the electrode pad 47.
- the pressure-sensitive conductive resin 48 can be formed on the electrode pad 47 where the bank layer 426 is not formed by the same method as in the first embodiment.
- the first flexible substrate 421 and the laminated structure on the first flexible substrate 421 can be formed on a glass substrate in the same manner as the active substrate 20 of the first embodiment, for example.
- a second flexible substrate 431 is laminated on the counter electrode 435 via an adhesive layer 427.
- the sensor unit that performs the touch sensor function includes the sensor TFT 42, the electrode pad 47, and the pressure-sensitive conductive resin 48, as in the first embodiment.
- the pressure-sensitive conductive resin 48 functions as a touch sensor that connects the electrode pad 47 and the counter electrode 435 and detects that a finger or a touch pen touches the display panel 4.
- the configuration of the pressure-sensitive conductive resin 48 may be the same as that of the first embodiment, for example.
- the configuration of the display panel 4 is not particularly limited except for a sensor unit that exhibits a touch sensor function, and may be the same as a conventionally known organic EL display panel, for example.
- a display panel with a touch sensor function can be realized only by making a slight design change of adding a sensor unit to an organic EL display panel having a conventionally known flexibility.
- the flexibility of the display panel hardly changes.
- the addition / change of the manufacturing process by adding a sensor part is few.
- a display panel with a touch sensor function can be manufactured without significantly changing the conventional manufacturing process of an organic EL display panel having flexibility.
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Abstract
Description
実施形態1では、本発明を高分子分散型液晶を用いた反射型液晶表示パネルに適用した例を示す。図1は、本実施形態1に係るタッチセンサ機能付き液晶表示パネル1の概略構成を示した平面図である。
実施形態1では反射型の液晶表示パネル1を説明した。本実施形態2では、本発明を透過型の液晶表示パネルに適用した例を説明する。本実施形態2の表示パネルの全体構成は、実施形態1で説明した図1と概略同じである。
本実施形態3では、本発明を電気泳動方式の表示パネルに適用した例を説明する。電気泳動方式の表示パネルの構成は、実施形態1で説明した液晶表示パネル1において、液晶層40に代えて、荷電粒子を含む電気泳動層を用いた構成と概略同じである。本実施形態3の表示パネルの全体構成は、実施形態1で説明した図1と概略同じである。
本実施形態4では、本発明を有機EL(Electro Luminescence)表示パネルに適用した例を説明する。本実施形態4の表示パネルの全体構成は、実施形態1で説明した図1と概略同じである。
Claims (10)
- マトリクス状に配置された複数の絵素電極と、前記複数の絵素電極に対向する対向電極と、前記複数の絵素電極及び前記対向電極を間に挟んで対向する一対のフレキシブル基板とを備え、前記対向電極に対する前記複数の絵素電極のそれぞれの電位を制御することにより所望の表示を行う表示パネルであって、
前記一対のフレキシブル基板の間に、加えられる圧縮力に応じてその電気抵抗値が変化する感圧導電樹脂が配置されており、
前記一対のフレキシブル基板の一方に加えられた押力によって生じる前記一対のフレキシブル基板の間隔の変化を、前記感圧導電樹脂を流れる電流値に基づいて検出することを特徴とするタッチセンサ機能付きフレキシブル表示パネル。 - 前記感圧導電樹脂がマトリクス状に配置されている請求項1に記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記感圧導電樹脂が、一対のフレキシブル基板を接着している請求項1又は2に記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記感圧導電樹脂が、前記一対のフレキシブル基板の間隔を所定値に維持している請求項1~3のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記表示パネルが反射型液晶表示パネルである請求項1~4のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記表示パネルが透過型液晶表示パネルである請求項1~4のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記一対のフレキシブル基板のうち、一方のフレキシブル基板には、他方のフレキシブル基板とは反対側において、柔軟性を有する照明装置を更に備える請求項6に記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記複数の絵素電極と前記対向電極との間に高分子分散型液晶が設けられている請求項1~7のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記表示パネルが電気泳動方式の表示パネルである請求項1~4のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
- 前記表示パネルが有機EL表示パネルである請求項1~4のいずれかに記載のタッチセンサ機能付きフレキシブル表示パネル。
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US13/511,098 US9030427B2 (en) | 2009-11-20 | 2010-11-09 | Flexible display panel with touch sensor function |
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CN102667678A (zh) | 2012-09-12 |
US9030427B2 (en) | 2015-05-12 |
US20120242610A1 (en) | 2012-09-27 |
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