KR102052745B1 - Display Device with Thin Film Touch Sensor - Google Patents
Display Device with Thin Film Touch Sensor Download PDFInfo
- Publication number
- KR102052745B1 KR102052745B1 KR1020130065280A KR20130065280A KR102052745B1 KR 102052745 B1 KR102052745 B1 KR 102052745B1 KR 1020130065280 A KR1020130065280 A KR 1020130065280A KR 20130065280 A KR20130065280 A KR 20130065280A KR 102052745 B1 KR102052745 B1 KR 102052745B1
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- Prior art keywords
- routing
- thin film
- touch
- film layer
- sensor module
- Prior art date
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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
-
- 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
- G06F3/0412—Digitisers structurally integrated in a display
Abstract
The present invention relates to a display device having a touch sensor module that can reduce the thickness and weight of the entire display device and easily install a flexible printed circuit. The touch sensor module includes a touch electrode forming area, a routing wiring forming area, A thin film layer having a routing pad formation region; A plurality of first touch electrodes arranged side by side in the touch electrode formation region on the first surface of the thin film layer; A plurality of second touch electrodes arranged side by side in a direction crossing the plurality of first touch electrodes in a touch electrode formation region on a second surface of the thin film layer; A plurality of first routing lines respectively connected to the plurality of first touch electrodes in a routing line forming area on a first surface of the thin film layer; A plurality of second routing lines respectively connected to the plurality of second touch electrodes in a routing line forming area on a second surface of the thin film layer; A plurality of first routing pads each connected to the plurality of first routing wires in a routing pad forming area on a first surface of the thin film layer; A plurality of second routing pads each connected to the plurality of second routing lines in a routing line forming area on a second surface of the thin film layer; And a flexible printed circuit having a first portion on which wiring lines are respectively connected to the plurality of first routing pads, and a second portion on which wiring lines are respectively connected to the plurality of second routing pads.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a display device having a thin touch sensor module.
Recently, various input devices such as a keyboard, a mouse, a trackball, a joystick, a digitizer, and the like have been used to configure an interface between a user and a home appliance or various information communication devices. However, the use of the input device as described above has been difficult to increase the degree of completeness of the product by causing inconveniences such as taking up usage and taking up space. Thus, there is an increasing demand for an input device that is convenient, simple and can reduce malfunctions. In response to such a demand, a touch sensor has been proposed to recognize information when a user directly touches or approaches a screen with a hand or a pen while looking at a display device.
The touch sensor is applied to various display devices because of its simplicity, less malfunction, and the convenience of inputting without the use of a separate input device and the quick and easy operation by the user. have.
The touch sensor used in the above-described display device may be classified into an add-on type, an on-cell type, and an integrated type or in-cell type according to its structure. The top plate attaching type is a method of attaching the touch sensor module to the top plate of the display device after separately manufacturing the display device and the touch sensor module. The upper plate integrated type directly forms elements constituting the touch sensor module on the upper glass substrate surface of the display device. The built-in type is a method of achieving a thinner display device and increasing durability by embedding elements constituting a touch sensor inside the display device.
The top plate attachment type of such a touch sensor module is widely used because of its simplicity and ease of manufacture and application to a display device.
Hereinafter, a display device having a conventional touch sensor module will be described with reference to FIGS. 1 and 2. 1 is a plan view of a display device having a conventional touch sensor module, and FIG. 2 is a cross-sectional view taken along line II ′ of the touch sensor module shown in FIG. 1.
1 and 2, a display device including a conventional touch sensor module includes a display panel DP and a touch sensor module attached to the display panel DP by an adhesive layer A. Referring to FIG. The touch sensor module includes a cover glass CG, a plurality of touch driving electrodes Tx1 to Tx5 formed on one surface of the cover glass CG in parallel with each other, and an insulating layer INS. Touch sensing electrodes Rx1 ˜ formed on the insulating layer INS to be insulated from the driving electrodes Tx1 ˜ Tx5, and formed to be parallel to each other in a direction crossing the plurality of touch driving electrodes Tx1 ˜ Tx5. Rx6).
More specifically, the touch sensor module includes a touch electrode forming area TA in which the touch driving electrodes Tx1 to Tx5 and the touch sensing electrodes Rx1 to Rx6 are formed, and routing wires connected to the touch electrodes, respectively. Routing wiring forming area B in which RW1 and RW2 are formed, and routing pads RP1 and RP2 for connecting the routing lines RW1 and RW2 and signal lines (not shown) of the touch driving circuit are provided. And a pad forming region C to be formed.
The touch electrode forming unit TA may include a plurality of touch driving electrodes Tx1 to Tx5 arranged side by side on one surface of the cover glass CG, and an insulation covering the plurality of touch driving electrodes Tx1 to Tx5. The layer INS and a plurality of second touch sensing electrodes Rx1 to Rx6 are arranged side by side in a direction crossing the plurality of touch driving electrodes Tx1 to Tx5 on the insulating layer.
The routing lines and the pad forming regions WA and PA may include first routing lines RW1 connected to the plurality of touch driving electrodes Tx1 to Tx5, and a plurality of second touch sensing electrodes Rx1 to Rx6, respectively. Second routing wires RW2 respectively connected to the first routing pads RP1 and second routing wires RW2 respectively connected to the first routing wires RW1, respectively. Routing pads RP2.
In the display device having the touch sensor module having the above-described structure, the total thickness t of the display device is the thickness a1 of the cover glass CG, the thickness a2 of the touch driving electrode Tx, the thickness a3 of the insulating layer INS, The thickness a4 of the touch sensing electrode Rx, the thickness a5 of the adhesive layer A, and the thickness a6 of the display panel DP are determined.
However, since the cover glass (CG) used as a substrate of the conventional touch sensor module is generally formed of glass and is fragile, the cover glass has a certain thickness to withstand the process conditions for forming the sensor elements. I had to. For this reason, the thickness of the entire display device is conventionally increased and the weight is also increased.
In addition, in the conventional touch sensor module, the first routing pad RP1 is connected to the touch driving electrodes Tx1 to Tx5 through the first routing wire RW1 and the touch sensing electrode through the second routing wire RW2. Since the second routing pads RP2 connected to the RX1 to Rx6 are formed on different layers, the flexible printed circuits connected to the first and second routing pads RP1 and RP2 to transmit and receive signals with the outside ( It is difficult to install flexible printed circuitry (FPC) (not shown), and in particular, there is a problem in that the thickness becomes thick due to the FPC connected to the second routing pad RP2.
An object of the present invention is to solve the problems of the prior art, by removing the cover glass of the display device to reduce the thickness and weight of the entire display device, and having a thin film touch sensor that can easily install a flexible printed circuit It is to provide a display device.
According to an aspect of the present invention, there is provided a display device including a touch sensor module, including: a display panel configured to display an image; A touch sensor module disposed on the display panel; And a hard film disposed on the touch sensor module, wherein the touch sensor module comprises: a thin film layer including a touch electrode forming region, a routing wiring forming region, and a routing pad forming region; A plurality of first touch electrodes arranged side by side in the touch electrode formation region on the first surface of the thin film layer; A plurality of second touch electrodes arranged side by side in a direction crossing the plurality of first touch electrodes in a touch electrode formation region on a second surface of the thin film layer; A plurality of first routing lines respectively connected to the plurality of first touch electrodes in a routing line forming area on a first surface of the thin film layer; A plurality of second routing lines respectively connected to the plurality of second touch electrodes in a routing line forming area on a second surface of the thin film layer; A plurality of first routing pads each connected to the plurality of first routing wires in a routing pad forming area on a first surface of the thin film layer; A plurality of second routing pads each connected to the plurality of second routing lines in a routing line forming area on a second surface of the thin film layer; And a flexible printed circuit having a first portion on which wiring lines are respectively connected to the plurality of first routing pads, and a second portion on which wiring lines are respectively connected to the plurality of second routing pads. It features.
The flexible panel is disposed between the display panel and the first surface of the thin film layer on which the first touch electrode is formed to bond the first surface of the thin film layer on which the display panel and the first touch electrode are formed. The apparatus may further include a first adhesive layer having a cutting portion formed in an area corresponding to the first portion of the circuit.
Disposed between the hard film and the second surface of the thin film layer on which the second touch electrode is formed to bond the second surface of the thin film layer on which the hard film and the second touch electrode are formed; The display device may further include a second adhesive layer having a cutting portion in an area corresponding to the second portion of the circuit.
The thin film is polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polymethyl methacrylate (PMMA), polyethylene naphthalate (polyethylene naphthalate, PEN) It may be selected from a polymer material containing).
The hard film is one of an anti-scattering film (ASF) and an anti-glare film having a hardness of 2H or more and having a low dielectric constant.
According to the display device including the touch sensor module according to the present invention, since the thin film film is used as the substrate of the touch sensor module and a hard film is attached to the upper part of the touch sensor module to protect the touch sensor module, The weight can be reduced.
In addition, since the touch electrodes of the touch sensor module are attached to the upper and lower surfaces of the thin film, respectively, and the first and second routing pads formed on both the upper and lower sides can be connected to an external touch processor using one flexible printed circuit. The effect of simplifying the installation of the printed circuit can be obtained.
In addition, by removing the first and second adhesive layers existing on the upper and lower surfaces of the thin film film corresponding to the position where the flexible printed circuit is installed, the step that may occur at the edge of the touch sensor module due to the thickness of the flexible printed circuit is removed. The effect of obtaining planarization can be obtained.
1 is a schematic plan view of a display device having a touch sensor module according to the prior art;
FIG. 2 is a cross-sectional view taken along lines I-I 'and II-II' of the display device having the conventional touch sensor module shown in FIG. 1;
3 is a schematic plan view of a display device having a touch sensor module according to an embodiment of the present invention;
4 is a cross-sectional view taken along lines I-I 'and II-II' of a display device having a touch sensor module according to the embodiment of the present invention shown in FIG.
5 is a plan view of the adhesive layer shown in FIG.
Hereinafter, a liquid crystal display according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like numbers refer to like elements throughout.
A display device including a touch sensor module according to an exemplary embodiment of the present invention will be described with reference to FIGS. 3 and 4. 3 is a schematic plan view of a display device with a touch sensor module according to an embodiment of the present invention, and FIG. 4 is a line I-I of the display device with a touch sensor module according to the embodiment of the present invention shown in FIG. Sectional view taken along II, II.
3 and 4, a liquid crystal display according to an exemplary embodiment of the present invention includes a display panel DP, a touch sensor module disposed on the display panel DP, and a touch sensor module disposed on the touch panel. Hard film (HF) to protect the sensor module.
The touch sensor module includes a touch electrode forming area TA in which the first touch electrodes Tx1 to Tx5 and the second touch electrodes Rx1 to Rx6 are formed, the first routing wires RW1, and the second routing wire. And a routing line forming area WA in which the first and second routing pads RP1 and RP2 are formed.
In the touch electrode forming area TA of the touch sensor module, a plurality of thin film layers FL and a plurality of layers arranged in parallel with each other in a first direction (for example, a horizontal direction) on the first surface of the thin film layer FL. A second direction intersecting the first touch electrodes Tx1 to Tx5 and the first touch electrodes Tx1 to Tx5 on the second surface (the opposite surface of the first surface) of the thin film FL For example, a plurality of second touch electrodes Rx1 to Rx6 are arranged to be parallel to each other in the vertical direction.
Thin film is polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN) It may be formed using a polymer material such as.
Each of the first and second touch electrodes Tx1 to Tx5 and Rx1 to Rx6 may be indium tin oxide (ITO), indium zinc oxide (IZO), gallium-doped zinc oxide (GZO), or a metal mesh type. ) Transparent conductive material such as transparent electrode, metal nanowire, or carbon-based transparent electrodes.
A plurality of first routing wires RW1 and a plurality of second touch electrodes Rx1 to Rx6 are respectively connected to the plurality of first touch electrodes Tx1 to Tx5 in the routing wire forming area WA of the touch sensor module. A plurality of second routing wires RW2 are formed to be connected to each other.
In the routing pad forming area PA of the touch sensor module, a plurality of first routing pads RP1 respectively connected to a plurality of first routing wires RW1 and a plurality of second routing wires RW2 are respectively connected. A plurality of second routing pads RP2 are formed.
The plurality of first and second routing lines RW1 and RW2 and the plurality of first and second routing pads RP1 and RP2 may be formed of a double layer of a transparent conductive layer and a metal layer, or may be formed of a single layer of a metal layer. Can be. The transparent conductive layer, like the first and second touch electrodes, may be formed using a transparent conductive material such as ITO, IZO, GZO, metal mesh-type transparent electrode, metal nanowire, or carbon-based transparent electrodes, and the metal layer Silver may be formed using a metal material such as Al, AlNd, Mo, MoTi, Cu, Cr, Ag, Ag-based alloys.
As illustrated in FIG. 4, a hard film is attached to the upper surface of the touch sensor module having the above-described configuration by the first adhesive layer A1, and the display panel is attached to the lower surface by the second adhesive layer A2. DP) is attached.
As the first and second adhesive layers A1 and A2, an optically clear adhesive (OCA), an optically clear resin (OCR), and the like are used.
As a hard film, an anti-scattering film (ASF), an anti-glare film, or the like having a hardness of 2H or more and a low dielectric constant is used.
Meanwhile, flexible printed circuits in which signal wirings are formed on the first routing pads RP1 and the second routing pads RP2 of the routing pad forming area PA to transmit and receive signals to and from a touch processor (not shown) are provided. printed circuitry (FPC) is attached.
The flexible printed circuit FPC may include a first part including signal lines connected to second routing pads RP1 connected to the first touch electrodes Tx to Tx6 through the first routing wires RW1; And a second portion in which signal lines are connected to third routing pads RP2 connected to the second touch electrodes Rx1 to Rx5 through the second routing line RW2.
The area of the adhesive layer A2 corresponding to the first portion of the flexible printed circuit FPC has a cutting portion CUT to accommodate the first portion. The area of the adhesive layer A1 corresponding to the second portion of the flexible printed circuit FPC also has a cutting portion CUT to accommodate the second portion.
In the display device having the touch sensor module according to the embodiment of the present invention, the total thickness t2 of the display device is the thickness b1 of the hard film HF, the thickness b2 of the adhesive layer A1, and the second touch electrode Rx. The thickness b3 is determined by the sum of the thickness b4 of the thin film layer FL, the thickness b5 of the first touch electrode Tx, the thickness b6 of the adhesive layer A2, and the thickness b7 of the display panel DP.
Comparing the total thickness t1 of the conventional display device with the total thickness t2 of the display device according to the exemplary embodiment of the present invention, the display panel DP, one adhesive layer A and A2, and touch electrodes common to both display devices are compared. The thicknesses of (Tx, Rx) are the same. Therefore, the thickness except these will be compared. In the conventional display device, the cover glass CG is disposed at the top, and in the display device of the present invention, the hard film HC is disposed at the top. The thickness b1 of the hard film HC may be approximately 1/3 of the thickness a1 of the cover glass CG.
In addition, in the touch sensor module of the present invention, the thickness b4 of the thin film layer FL may be formed to have a thickness substantially similar to the thickness a3 of the insulating layer INS.
On the other hand, since the touch sensor module of the present invention includes an unnecessary adhesive layer A1 in the conventional touch sensor module, the touch sensor module has an element capable of increasing the thickness of the display device by the thickness b2 of the adhesive layer A1.
However, even if the thickness b2 of the adhesive layer A1 is further, the adhesive layer A1 is formed very thinly unlike the hard film or the cover glass, and the thickness b1 of the hard film HF employed in the present invention and the thin film layer FL ), The thickness b4 is much smaller than the thickness a1 of the conventional cover glass CG, so that the overall thickness of the display device can be reduced. In addition, while the cover glass (CG) is made of glass, the hard film (HF) of the present invention is formed of a polymer material, so that its weight can be significantly reduced.
In addition, in the display device according to the exemplary embodiment of the present invention, the adhesive layer A2 is disposed below the first routing pads RP1 on which the flexible printed circuit FPC is installed, and the second routing pads RP2 are disposed. Each of the adhesive layers A1 positioned on the upper portion is provided with a cutting unit CUT, as shown in FIG. 5.
Therefore, the first portion of the flexible printed circuit FPC connected to the first routing pads RP1 is accommodated in the cutting portion CUT of the adhesive layer A2 and connected to the second routing pads RP2. The second portion of the flexible printed circuit FPC may be accommodated in the cut portion CUT of the adhesive layer A1. As described above, since the second and first portions of the flexible printed circuit FPC respectively positioned on the upper and lower surfaces of the thin film layer FL are accommodated in the cutting portions CUT of the adhesive layers A2 and A1, It is possible to prevent the generation of a step by the flexible printed circuit (FPC) at the edge portion. Therefore, not only the damage caused by the step difference of the touch sensor module may be prevented, but also the thickness due to the flexible printed circuit (FPC) may be reduced.
According to the display device including the touch sensor module according to the present invention, since the thin film film is used as the substrate of the touch sensor module and a hard film is attached to the upper part of the touch sensor module to protect the touch sensor module, The weight can be reduced.
In addition, since the touch electrodes of the touch sensor module are attached to the upper and lower surfaces of the thin film, respectively, and the first and second routing pads formed on both the upper and lower sides can be connected to an external touch processor using one flexible printed circuit. The effect of simplifying the installation of the printed circuit can be obtained.
In addition, by removing the first and second adhesive layers existing on the upper and lower surfaces of the thin film film corresponding to the position where the flexible printed circuit is installed, the step that may occur at the edge of the touch sensor module due to the thickness of the flexible printed circuit is removed. The effect of obtaining planarization can be obtained.
Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.
A1, A2: adhesive layer DP: display panel
Tx1 to Tx5: First touch electrode Rx1 to Rx6: Second touch electrode
RW1: first routing wire RW2: second routing wire
RP1: first routing pad RP2: second routing pad
FPC: Flexible Printed Circuit
Claims (5)
A touch sensor module disposed on the display panel; And
It includes a hard film disposed on the touch sensor module,
The touch sensor module,
A thin film layer including a touch electrode forming region, a routing wiring forming region, and a routing pad forming region;
A plurality of first touch electrodes arranged side by side in the touch electrode formation region on the first surface of the thin film layer;
A plurality of second touch electrodes arranged side by side in a direction crossing the plurality of first touch electrodes in a touch electrode formation region on a second surface of the thin film layer;
A plurality of first routing lines respectively connected to the plurality of first touch electrodes in a routing line forming area on a first surface of the thin film layer;
A plurality of second routing lines respectively connected to the plurality of second touch electrodes in a routing line forming area on a second surface of the thin film layer;
A plurality of first routing pads each connected to the plurality of first routing wires in a routing pad forming area on a first surface of the thin film layer;
A plurality of second routing pads each connected to the plurality of second routing lines in a routing line forming area on a second surface of the thin film layer;
A flexible printed circuit having a first portion formed with wires connected to the plurality of first routing pads and a second portion formed with wires connected to the plurality of second routing pads, respectively;
The flexible panel is disposed between the display panel and the first surface of the thin film layer on which the first touch electrode is formed to bond the first surface of the thin film layer on which the display panel and the first touch electrode are formed. A first adhesive layer having a first cutting portion in a region corresponding to the first portion of the circuit; And
Disposed between the hard film and the second surface of the thin film layer on which the second touch electrode is formed to bond the second surface of the thin film layer on which the hard film and the second touch electrode are formed, the flexible printing A second adhesive layer having a second cut portion formed in an area corresponding to the second portion of the circuit,
The first portion of the flexible printed circuit connected to the first routing pads is accommodated in the first cutting portion of the first adhesive layer so that a step by the flexible printed circuit does not occur, and the second routing pads And a second portion of the flexible printed circuit connected to is received in a second cutting portion of the second adhesive layer.
The thin film is polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polymethyl methacrylate (PMMA), polyethylene naphthalate (polyethylene naphthalate, PEN) A display device, characterized in that selected from polymer materials including).
The hard film is one of an anti-scattering film (ASF) and an anti-glare film having a hardness of 2H or more and having a low dielectric constant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130065280A KR102052745B1 (en) | 2013-06-07 | 2013-06-07 | Display Device with Thin Film Touch Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130065280A KR102052745B1 (en) | 2013-06-07 | 2013-06-07 | Display Device with Thin Film Touch Sensor |
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| KR20140143573A KR20140143573A (en) | 2014-12-17 |
| KR102052745B1 true KR102052745B1 (en) | 2019-12-06 |
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| KR1020130065280A KR102052745B1 (en) | 2013-06-07 | 2013-06-07 | Display Device with Thin Film Touch Sensor |
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| KR102548931B1 (en) * | 2016-03-22 | 2023-06-30 | 삼성디스플레이 주식회사 | Display device |
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| KR20100095988A (en) * | 2009-06-25 | 2010-09-01 | (주)이엔에이치 | Electrostatic capacity type touch screen panel |
| KR101356726B1 (en) * | 2009-11-20 | 2014-02-13 | 박준영 | Method of preparing capacitance type touch panel and capacitance type touch panel prepared by the same |
| KR101406221B1 (en) * | 2011-09-09 | 2014-06-13 | 동우 화인켐 주식회사 | Integrated touch polarizing plate and liquid crystal display device integrating the same |
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