WO2013042646A1

WO2013042646A1 - Image display device

Info

Publication number: WO2013042646A1
Application number: PCT/JP2012/073780
Authority: WO
Inventors: 元長岡; 数生中村
Original assignee: シャープ株式会社
Priority date: 2011-09-22
Filing date: 2012-09-18
Publication date: 2013-03-28
Also published as: TW201319889A

Abstract

In order to reduce the number of components and eliminate time and effort in the manufacturing process without reducing touch panel detection precision, first pattern wiring (211) and second pattern wiring (212) which is formed in such a way that a control unit (5) is not present therein are provided in a touch panel (3), and signal wiring connected electrically to the first pattern wiring and an external device is formed in the same FPC as the wiring connected electrically to the second pattern wiring and the touch panel.

Description

Image display device

The present invention relates to an image display device provided with a touch panel type input device.

As an input device for an electronic device such as a mobile phone, an information terminal, a tablet computer, or a game machine, a touch panel method in which an input operation is performed by touching the screen is often employed. The touch panel is often placed over an image display panel such as a liquid crystal panel unit.

A liquid crystal display device having a conventional touch panel will be described with reference to the drawings. FIG. 11 is an exploded perspective view showing a schematic configuration of a conventional liquid crystal display device. As shown in FIG. 11, the liquid crystal display device D includes a backlight unit 91, a liquid crystal panel unit 92, and a touch panel unit 93 that is arranged on the front side of the liquid crystal panel unit 92. In the liquid crystal panel unit 92, two

glass substrates

921 and 922 are arranged at a predetermined interval, and the gap is filled with liquid crystal.

Of the two

glass substrates

921 and 922, the glass substrate 921 on the back side is formed larger than the glass substrate 922 on the front side, and the wiring formed on the surface of the glass substrate 921 on the back side has a liquid crystal panel. A liquid crystal controller 951 for controlling the unit 92 is mounted (COG: Chip On Glass). A main FPC 941 that exchanges signals between the liquid crystal controller 951 and an external control device (not shown) is connected to the glass substrate 921 on the back side, and the wiring of the glass substrate 921 and the wiring of the main FPC 941 are connected. Electrically connected.

The touch panel unit 93 is attached so as to overlap the glass substrate 922 on the front side of the liquid crystal panel unit 92. A wiring (not shown) is formed on the edge of the surface of the touch panel unit 93, and a touch panel FPC 942 is connected to the wiring. A touch panel controller 952 for controlling the touch panel unit 93 is mounted on the touch panel FPC 942 connected to the touch panel unit 93. The touch panel FPC 942 connected to the touch panel unit 93 is connected to the main FPC 941 connected to the glass substrate 921. Thus, the touch panel controller 952 and the liquid crystal controller 951 can be electrically connected (see, for example, Japanese Patent Application Laid-Open Nos. 2010-205220 and 10-319425).

Recently, in a liquid crystal display device equipped with a touch panel, it has been studied to integrate the liquid crystal controller and the touch panel controller and mount them on a glass substrate of a liquid crystal panel. A liquid crystal display device using an integrated controller will be described with reference to the drawings. FIG. 12 is an exploded perspective view showing a schematic configuration of an improved type of the liquid crystal display device shown in FIG.

As shown in FIG. 12, in the liquid crystal display device E, an integrated controller 95 in which a liquid crystal controller and a touch panel controller are integrated is mounted on a glass substrate 921 on the back side, and a main FPC 941 and a touch panel unit 93 are connected by an FPC 942 for a touch panel. Except for the connection, the liquid crystal display device D has the same configuration as the liquid crystal display device D shown in FIG.

In the liquid crystal display device E, the exchange of signals between the liquid crystal panel unit 92 and the touch panel unit 93 and the outside is collectively controlled via an integrated controller 95. As shown in FIG. 12, in the liquid crystal display device E, a main FPC 941 is connected to a glass substrate 921 on the back side on which the integrated controller 95 is mounted. A touch panel FPC 942 is connected to the main FPC 941, and the touch panel FPC 942 is also connected to the touch panel unit 93. Accordingly, the touch panel unit 93 and the integrated controller 95 are connected by the main FPC 941 and the touch panel FPC 942.

Thus, by using the integrated controller 95, the number of parts can be reduced, and accordingly, downsizing and manufacturing cost can be reduced.

JP 2010-205220 A JP 10-319425 A

However, when the integrated controller 95 is used as in the liquid crystal display device E shown in FIG. 12, the main FPC 941 and the touch panel FPC 942 are required, and the touch panel FPC 942 must be connected to the main FPC 941. The difficulty of the assembly process increases.

Further, when a signal is sent from the touch panel unit 93 to the outside, the signal sent to the touch panel FPC 942 is turned back by the main FPC 941, input to the integrated controller 95, and sent to the outside through another wiring of the main FPC 941. When receiving a signal from the outside, the reverse path is used. For this reason, the wiring from the touch panel unit 93 to the integrated controller 95 (and thus to the outside) becomes long, and the touch panel FPC 942 and the main FPC 941 are three-dimensionally crossed to generate a touch panel unit due to wiring parasitic capacitance and noise. There is a concern that the detection accuracy of 93 is lowered.

Therefore, an object of the present invention is to provide an image display device that can reduce the number of parts and reduce the labor and time of manufacturing without reducing the detection accuracy of the touch panel.

In order to achieve the above object, the present invention provides an image display unit including a substrate having a wiring formed on the surface thereof, a touch panel disposed on the front side of the image display unit, and mounted on the substrate, the image display unit, A control unit that controls the touch panel; and an FPC that electrically connects the control unit to an external device and the control unit to the touch panel, and the wiring is a first pattern wiring connected to the control unit. And the second pattern wiring connected to the control unit and formed so that the first pattern wiring and the control unit do not exist between the touch panel, the first pattern wiring and the external device, An image display device is provided in which a signal wiring that electrically connects the second wiring pattern and a connection wiring that electrically connects the second pattern wiring and the touch panel are formed on the same FPC.

According to this configuration, since the second pattern wiring is formed so that the first pattern wiring and the control unit are not located between the second pattern wiring and the touch panel, the second pattern wiring and the touch panel are formed. The touch panel connection part for connecting the two can be formed short.

Further, it is possible to prevent the second pattern wiring and the first pattern wiring or the control unit from crossing three-dimensionally, thereby detecting a touch panel due to parasitic capacitance or noise generated in the FPC wiring. A decrease in accuracy can be suppressed.

Furthermore, since the control unit and the external device and the control unit and the touch panel can be connected with one FPC in which signal wiring and connection wiring are formed, the number of parts can be reduced.

In the above configuration, the FPC may include a main connection portion including the signal wiring and a touch panel connection portion including the connection wiring.

In the above configuration, the control unit has a rectangular shape in a front view, the first pattern wiring extends along a short direction of the control unit, and the second pattern wiring extends in a longitudinal direction of the control unit. It may be.

In the above configuration, the touch panel may be formed by disposing a transparent electrode on a surface of a transparent substrate, and the touch panel may be attached and fixed to the front side of the image display unit.

In the above configuration, the touch panel is formed of a thin film on the front surface of the image display unit.

In the above-described configuration, the image display unit is a liquid crystal panel unit, and the wiring is formed on a rear substrate of two glass substrates sandwiching the liquid crystal layer, and the control unit is mounted. May be.

In the above configuration, the image display unit may be an organic EL panel unit, the wiring may be formed on a back substrate, and the control unit may be mounted.

According to the present invention, it is possible to provide an image display device that can reduce the number of parts and reduce the labor and time of manufacturing without reducing the detection accuracy of the touch panel.

It is a disassembled perspective view of the liquid crystal display device which is an example of the image display apparatus concerning this invention. It is the schematic of the state which connected FPC to the liquid crystal display device. It is a block diagram of the liquid crystal display device shown in FIG. 2 is a flowchart showing a manufacturing process of the liquid crystal display device shown in FIG. 1. It is the schematic which shows a mounting process. It is the schematic which shows a sticking process. It is the schematic which shows a connection process. It is the schematic which shows a connection process. It is a figure which shows the attachment process in the case of attaching FPC to a liquid crystal panel unit and a touch panel unit by 1 process. FIG. 3 is a schematic view of a state in which an FPC is connected to a liquid crystal display device having a shape different from that in FIG. 2. FIG. 3 is a schematic view of a state in which an FPC is connected to a liquid crystal display device having a shape further different from that in FIG. 2. It is a disassembled perspective view of the liquid crystal display device which is one of the other examples of the image display apparatus concerning this invention. It is the schematic of the state which connected FPC to the liquid crystal display device of FIG. 9A. It is a disassembled perspective view of the organic electroluminescence display which is one of the other examples of the image display apparatus concerning this invention. It is the schematic of the state which connected FPC to the organic electroluminescence display of FIG. 10A. It is a disassembled perspective view which shows schematic structure of the conventional liquid crystal display device. It is a figure which shows the schematic structure of the improved type of the liquid crystal display device shown in FIG.

(First embodiment)
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a liquid crystal display device which is an example of an image display device according to the present invention, FIG. 2 is a schematic view of a state in which an FPC is connected to the liquid crystal display device, and FIG. It is a block diagram of a display apparatus. In FIG. 1, the upper side is the front side (observer side), and the lower side is the back side. In the following description, unless otherwise specified, the front side or the back side Shall be explained.

As shown in FIG. 1, the liquid crystal display device A includes a backlight unit 1, a liquid crystal panel unit 2 (image display unit), and a touch panel unit 3 (touch panel), which are arranged in this order from the back side. Yes. As shown in FIG. 1, the liquid crystal display device A includes a liquid crystal panel unit 2, a touch panel unit 3, a flexible printed circuit board (FPC) 4 including a signal line that connects a main controller Mcon to be described later, An integrated controller 5 (control unit) that controls the touch panel unit 3 is provided.

The backlight unit 1 is a back lighting device that emits planar light from the back side of the liquid crystal panel unit 2. The backlight unit 1 includes an LED mounting substrate (LED panel) 10, an LED driver (not shown), an LED (Light Emitting Diode) 11, an optical member 12 such as a diffusion plate or an optical sheet, and the like. In the backlight unit 1, the LED panel 10 has the LED 11 mounted on the mounting surface facing the liquid crystal panel unit 2.

The LED 11 forms, for example, an LED unit in which LED chips that emit light of wavelengths of red, green, and blue (R, G, B) are gathered. The LED unit becomes white light as a whole by emitting light of each wavelength. Moreover, about the structure (a kind, a color, a combination, etc.) of LED11, another aspect may be sufficient. For example, a white LED such as a pseudo white LED or a high color rendering white LED may be used in place of the LED unit described above, or an LED that emits light of a yellow (Y) wavelength in addition to the above RGB. A concentrated LED unit may be used.

The backlight unit 1 uses an LED as a light source. However, the backlight unit 1 is not limited to this, and may be a device that can emit white light, such as a cold cathode tube.

The liquid crystal panel unit 2 is disposed on the back side, the array substrate 21 on which switching elements such as TFTs (thin film transistors) and pixel electrodes are formed, and the common electrode that is disposed facing the front side of the array substrate 21 and is common to the pixels. And the liquid crystal (not shown) filled between the array substrate 21 and the counter substrate 22. The liquid crystal panel unit 2 includes an integrated controller 5 that controls switching elements such as TFTs. In FIG. 1, the array substrate 21 is disposed on the back side and the counter substrate 22 is disposed on the front side. However, the present invention is not limited to this, and the array substrate 21 and the counter substrate 22 may be reversed. .

As shown in FIG. 1, the array substrate 21 is formed longer in the longitudinal direction than the counter substrate 22, and the array substrate 21 is disposed so as to protrude from the counter substrate 22 in the longitudinal direction. That is, when the liquid crystal panel unit 2 is viewed from the front side, the array substrate 21 on the back side protrudes from one side in the longitudinal direction of the counter substrate 22. Pattern wiring 210 (electrode) is formed on the front side of the portion of the array substrate 21 that protrudes from the counter substrate 22. And the integrated controller 5 is mounted in the front side of the protrusion part. The gate and source of the TFT of the array substrate 21 are connected to the pattern wiring 210, respectively.

In the liquid crystal display device A, each pixel includes a subcell that emits red (R), green (G), and blue (B) light. That is, a color filter that transmits the wavelength of each color is disposed on either the array substrate 21 or the counter substrate 22 constituting the subcell. The switching element is arranged for each subcell constituting the pixel of the image. By sending a panel drive signal to the switching element, the array substrate 21 (display electrode thereof) and the counter substrate 22 (common electrode of the subcell) are arranged. ) Is applied between the two. As a result, the direction of the liquid crystal in the subcell is changed, and the transmittance of red (R) wavelength light, green (G) wavelength light, and blue (B) wavelength light transmitted through the liquid crystal panel unit 2 is changed. . As a result, the intensity of light of each RGB color is changed and mixed, and light of a desired color (light that looks like a desired color) is emitted. Thereby, the color of a pixel is determined and an image is displayed.

The touch panel unit 3 is configured to be transparent or transmit light, and when the contact of the user's finger or a dedicated contact tool (such as a stylus) is detected in a predetermined detection region 300, the charge changes, and the charge changes. It is an electrostatic capacitance detection type touch panel for detecting. The touch panel unit 3 includes a transparent electrode that detects charges on the surface of a transparent substrate 30 such as glass, and detects movement of charges when a finger or the like comes into contact with the transparent electrode. The touch panel unit 3 is disposed (attached) on the front side of the liquid crystal panel unit 2, that is, on the front side of the counter substrate 22.

In the touch panel unit 3, it is only necessary to detect a change in charge due to contact with a finger or a dedicated contact tool in the detection region 300, and the transparent electrodes are arranged inside the contact region 300. A TP wiring 31 used when sending the charge detected by the transparent electrode to the TP controller unit 52 described later is formed in a portion surrounding the outer periphery of the contact region 300 (see FIG. 2).

In the liquid crystal display device A, the image of the operation unit is displayed on the liquid crystal panel unit 2, and the user regards the image as the operation unit and presses the image of the operation unit with a finger or a contact tool. When the image of the operation unit is pressed, the electric charge of the touch panel unit 3 at a position corresponding to the image of the operation unit moves. Based on the information on the movement of the charges, the position (for example, coordinates) where the finger or the like touches is specified by the TP controller unit 52. In the liquid crystal display device A, the integrated controller 5 determines the input operation based on the information on the contact position and the image information on the operation unit, and transmits the information to the main controller Mcon.

From the above, the touch panel unit 3 only needs to be able to specify an image displayed on the liquid crystal panel unit 2, and the detection area 300 is approximately the same size as the image display area (not shown) of the liquid crystal panel unit 2. Are arranged so as to overlap in front view. In addition, it is possible to perform various operations by switching the image of the operation unit displayed on the liquid crystal panel unit 2 and switching the operation associated with the image, and there are few restrictions on the image of the operation unit. Intuitive operation is also possible, improving operability. Further, it is not necessary to provide a scanning input unit such as an operation key in front of the video display device A, and the image display area can be enlarged accordingly.

As shown in FIG. 3, the main controller Mcon, the pattern wiring 210 of the array substrate 21 and the pattern wiring 210 and the TP wiring 31 of the touch panel unit 3 are connected by the FPC 4. The pattern wiring 210 includes a first pattern wiring 211 used for connection between the integrated controller 5 and the main controller Mcon, and a second pattern wiring 212 used for connection between the integrated controller 5 and the touch panel unit 3. ing. As shown in FIG. 2, the first pattern wiring 211 and the second pattern wiring 212 include a plurality of wirings that do not intersect each other.

2 and 3, the first pattern wiring 211 is used for connection between the integrated controller 5 and the main controller Mcon. A part of the first pattern wiring is used for transmission / reception of the LCD control signal for controlling the liquid crystal panel unit 2 (LCD wiring 213), and a part of the remaining wiring is used for transmission / reception of the TP control signal for controlling the touch panel unit 3. (TP wiring 214).

As shown in FIGS. 1 and 2, the integrated controller 5 has a rectangular parallelepiped shape, and is surface-mounted on the upper end portion (the longitudinal end portion of the array substrate 21) of the protruding portion of the array substrate 21. (Chip On Glass: COG implementation). As shown in FIGS. 2 and 3, the integrated controller 5 includes an LCD controller unit 51 that controls the liquid crystal panel unit 2 and a TP controller unit 52 that controls the touch panel unit 3. As shown in FIG. 2, the integrated controller 5 is divided in the longitudinal direction, and has a configuration in which one is an LCD controller unit 51 and the other is a TP controller unit 52. The arrangement of the terminals connected to at least the pattern wiring 210 is not limited to this, but the terminals connected to the LCD controller unit 51 on one side in the longitudinal direction and the terminals connected to the TP controller unit 52 on the other side It only has to be divided.

As shown in FIG. 2, the first pattern wiring 211 extends from the connecting portion with the integrated controller 5 toward the longitudinal end of the array substrate 21 (in FIG. 2, below the connecting portion with the integrated controller 5). The LCD wiring 213 is connected to the LCD controller unit 51, and the TP wiring is connected to the TP controller unit 52. In addition, the second pattern wiring 212 is longer than the end of the integrated controller 5 in the longitudinal direction (the direction perpendicular to the first pattern wiring 211 and away from the first pattern wiring 211), that is, the first pattern wiring 211 It extends in a direction that does not intersect.

As shown in FIG. 3, the LCD controller unit 51 is connected to the source driver 23 and the gate driver 24, and transmits a pixel signal to the source driver 23 and the gate driver 24 based on the LCD control signal. Therefore, the pattern wiring 210 includes a pixel signal wiring 215 for transmitting a pixel signal from the LCD controller unit 51 to the source driver 23 and the gate driver 24. Note that the pixel signal includes information on the voltage applied to the liquid crystal and the driving timing of each pixel.

The FPC 4 is a flexible wiring board, and includes a main connection part 41 that connects the main controller Mcon and the first pattern wiring 211, and a touch panel connection that connects the third pattern wiring 212 and the TP wiring 31 of the touch panel unit 3. Part 42. The touch panel connection portion 42 protrudes from a part of the main connection portion 41 and is formed so as not to overlap the main connection portion 41.

As shown in FIGS. 2 and 3, the main connection unit 41 controls the liquid crystal panel unit 2 and controls the touch panel unit 3 and the LCD signal wiring 411 (signal wiring) for transmitting and receiving image signals such as image data. TP signal wiring 412 (signal wiring) for transmitting and receiving contact information signals is provided. Note that the LCD signal wiring 411 and the TP signal wiring 412 each include a plurality of wirings arranged so as not to cross each other.

LCD signal wiring 411 is connected to LCD wiring 213. Further, the TP signal wiring 412 is connected to the TP wiring 214. As a result, the main controller Mcon, the LCD controller unit 51, and the TP controller unit 52 are connected. Further, a part of the LCD signal wiring 411 (for example, a power line, a ground line, etc.) is not connected to the LCD wiring 213 but is connected to a wiring connected to the inside of the liquid crystal display panel unit 2.

The connection wiring 421 of the touch panel connection unit 42 connects the second pattern wiring 212 and the TP wiring 31. Thereby, the touch panel unit 3 and the TP controller unit 52 are connected. The second pattern wiring 212 is formed so that the integrated controller 5 and the first wiring pattern 211 are not located between the second pattern wiring 212 and the touch panel unit 3. Accordingly, when the second pattern wiring 212 and the TP wiring 31 are connected by the touch panel connection unit 42, the length of the wiring (the connection wiring 421 and the second pattern wiring 212) connecting the touch panel unit 3 and the TP controller unit 52 is shortened. The three-dimensional intersection between the connection wiring 421 of the FPC 4 and another wiring can be prevented.

An anisotropic conductive film (ACF) is used to connect the LCD signal wiring 411 and TP signal wiring 412 of the FPC 4 to the first pattern wiring 211. In addition to the anisotropic conductive film, a connection method using a method capable of easily connecting fine wirings can be widely employed. The LCD signal wiring 411 and TP signal wiring 412 and the pattern wiring 210 are connected by a connection terminal Tc1. An anisotropic conductive film ACF is disposed between the FPC 4 and the array substrate 21, and the connection terminal Tc1 is heated and pressurized to be electrically connected. Similarly, the connection wiring 421 and the second pattern wiring 212 and the connection wiring 421 and the TP wiring 31 are connected by the connection terminal Tc2.

The manufacturing procedure of the image display device according to the present invention will be described with reference to the drawings. FIG. 4 is a flowchart showing a manufacturing method of the liquid crystal display device shown in FIG. 1, and FIGS. 5A to 5D are schematic views showing each manufacturing process shown in FIG.

The array substrate 21 and the counter substrate 22 are bonded together with a predetermined interval therebetween, and the gap is filled with liquid crystal to manufacture the liquid crystal panel unit 2. Note that pattern wirings or common electrodes including TFTs are formed in advance on the surfaces of the array substrate 21 and the counter substrate 22, and are arranged side by side so that the surfaces on which the pattern wirings or common electrodes are formed face each other. . As shown in FIG. 5A, the protruding portion of the array substrate 21 protrudes, and the integrated controller 5 is COG mounted on the pattern wiring 210 of the protruding portion (step S1 in FIG. 4).

At this time, the integrated controller 5 is mounted such that the LCD controller unit 51 is connected to the LCD wiring 213, and the TP controller unit 52 is connected to the TP wiring 214 and the second pattern wiring 212.

As shown in FIG. 5B, the touch panel unit 3 is attached to the front side of the counter substrate 22 of the liquid crystal panel unit 2 on which the integrated controller 5 is mounted so that the TP wiring 31 is on the front side (step in FIG. 4). S2).

As shown in FIG. 5C, the FPC 4 and the array substrate 21 are connected with the touch panel unit 3 and the liquid crystal panel unit 2 attached (step S3 in FIG. 4). At this time, the LCD signal wiring 411 and TP signal wiring 412 of the main connection portion 41 of the FPC 4 and the first pattern wiring 211 (LCD wiring 213 and TP wiring 214) are electrically connected.

More specifically, an anisotropic conductive film (ACF) is attached to the surface of the first pattern wiring 211. Then, the main connection portion 41 of the FPC 4 is arranged so that the LCD wiring 213, the LCD signal wiring 411, the TP wiring 214, and the TP signal wiring 412 of the first pattern wiring 211 overlap each other, and the heater head HD is disposed on the LCD wiring 213 and TP. The pressing ACF is heated against the connection terminal Tc1 formed on the wiring 214, and the elastic head ED is pressed against the pressure.

Then, a conductive path is formed in the ACF, and the LCD wiring 213 and the LCD signal wiring 411, the TP wiring 214 and the TP signal wiring 412 are electrically connected by the connection terminal Tc1, and the main connection portion 41 of the FPC 4 is arranged in the array. It is mechanically fixed to the protruding portion of the substrate 21. As a result, the main controller Mcon and the integrated controller 5 which are disposed at a position apart from the liquid crystal panel unit 2 are electrically connected. That is, the LCD control signal is transmitted to the LCD controller unit 51 via the LCD signal wiring 411. The TP control signal is transmitted / received to / from the TP controller unit 52 through the TP signal wiring 412. In the same way, the connection wiring 421 of the touch panel connection portion 42 of the FPC 4 is connected to the second pattern wiring 212 by the connection terminal Tc2.

As shown in FIG. 5D, the TP wiring 31 of the touch panel unit 3 and the connection wiring 421 of the touch panel connection section 42 of the FPC 4 are connected (step S4 in FIG. 4). At this time, the ACF is arranged above the TP wiring 31 of the touch panel unit 3 (upper of the connection terminal Tc2), and the tip portion of the touch panel connection portion 42 of the FPC 4 is arranged at the TP wiring 31 of the touch panel unit 3 (above the TP wiring 31). Placed on the top of the finished ACF. Then, the heater head HD is pressed against the connection terminal Tc2 and heated, and the elastic head ED is pressed and pressurized. Thereby, a conductive path is formed in the ACF, the TP wiring 31 and the connection wiring 421 are electrically connected by the connection terminal Tc2, and the touch panel connection portion 42 of the FPC 4 is mechanically fixed to the touch panel unit 3. . Thereby, the touch panel unit 3 and the TP controller unit 52 of the integrated controller 5 are electrically connected.

As described above, the controller for controlling the liquid crystal panel unit 2 and the touch panel unit 3 is integrated (integrated controller 5), and is COG-mounted on the glass substrate 21 (array substrate 21) of the liquid crystal panel unit 2, and the integrated controller 5 and a separately provided main controller Mcon and the touch panel unit 3 are connected by one FPC 4, the number of components can be reduced as compared with a liquid crystal display device having a conventional touch panel. In addition, the manufacturing process can be reduced by reducing the number of parts. As a result, labor and time required for manufacturing can be reduced, energy required for manufacturing the liquid crystal display device A can be reduced, and cost can be reduced.

The FPC 4 is formed so as not to overlap with the main connection portion 41 (not three-dimensionally intersect) with the main connection portion 41 connected to the first pattern wiring 211 of the array substrate 21, and connects the second pattern wiring 212 and the TP wiring 31. And a touch panel connection unit 42. Then, by adjusting the position of the touch panel connection portion 42 of the integrated controller 5 and the FPC 4, the second pattern wiring 212 and the connection wiring 421 of the touch panel connection portion 42 are shortened to connect the integrated controller 5 and the touch panel unit 3. It is possible.

Further, since the second pattern wiring 212 is formed so that the first pattern wiring 211 and the integrated controller 5 are not positioned between the second pattern wiring 212 and the touch panel unit 3, the second pattern wiring 212 and the TP When the wiring 31 is connected, the connection wiring 421, the first pattern wiring 211, and the integrated controller 5 can be prevented from crossing three-dimensionally.

As described above, the connection wiring 421 of the touch panel connection unit 42 is prevented from becoming long, and the connection wiring 421, the first pattern wiring 211 that transmits and receives high-frequency signals, and the integrated controller 5 are three-dimensionally crossed. Therefore, it is possible to reduce the parasitic capacitance and noise of the wiring, and to suppress the decrease in detection accuracy of the touch panel unit 3.

In the manufacturing process of the liquid crystal display device A, the connection between the FPC 4 and the array substrate 21 (step S3 in FIG. 4) and the connection between the FPC 4 and the TP wiring 31 of the touch panel unit 3 (step S4 in FIG. 4) are integrated. You may make it carry out in the process which carried out. FIG. 6 is a diagram showing an attaching process for attaching the FPC to the liquid crystal panel unit and the touch panel unit in one process.

As shown in FIG. 6, the surface on which the pattern wiring 210 of the array substrate 21 is formed and the surface on which the TP wiring of the touch panel unit 3 is formed have different heights in the manufacturing process. Therefore, the heater head FD1 and the elastic head ED provided with steps are pressed so that the heater and the elastic portion can be simultaneously brought into contact with the surface on which the pattern wiring 210 is formed and the surface on which the TP wiring 31 is formed. Is heated and pressurized. As a result, the FPC 4 can be attached in one step, and labor and time required for manufacturing can be reduced.

In the above-described embodiment, the TP controller unit 52 is formed at one end of the integrated controller 5 in the longitudinal direction. However, the present invention is not limited to this, and the TP controller 52 is disposed on both sides in the longitudinal direction. The second pattern wiring 212 may be formed so as to protrude from both sides in the longitudinal direction of the integrated controller 5 in the longitudinal direction.

(Modification)
A modification of the image display device shown in the first embodiment will be described with reference to the drawings. 7 is a schematic diagram of a state in which an FPC is connected to a liquid crystal display device having a shape different from that in FIG. 2, and FIG. 8 is a schematic diagram of a state in which the FPC is connected to a liquid crystal display device having a shape different from that in FIG. . The liquid crystal display device shown in FIG. 7 is the same as the liquid crystal display device shown in FIG. 2 except that the position of the connection terminal Tc2 between the wiring of the second pattern wiring 212 and the wiring 412 is different. Description is omitted.

As shown in FIG. 2, in the liquid crystal display device A, since the connection terminals Tc2 that connect the second pattern wiring 212 and the connection wiring 421 are arranged obliquely, the second pattern wiring 212 and the connection wiring are arranged. Connection with 421 is complicated. For this reason, the connection wiring 422 and the second pattern wiring 216 are formed so that the connection terminal Tc2 is arranged in the same straight line as the connection terminals Tc1 arranged in a straight line.

Specifically, the connection terminals Tc2 are arranged side by side on an extension line in the arrangement direction of the connection terminals Tc1, and the terminals (not shown) of the Tp controller unit 52 and the connection terminals Tc2 are connected with the shortest distance (preferably a straight line). The second pattern wiring 216 is formed in the second. Accordingly, since the connection terminal Tc1 and the connection terminal Tc2 are arranged in a straight line, the linear heater head HD and the elastic head ED are used, and the first pattern wiring 211 and the LCD signal are heated and pressed once. The wiring 411, the TP signal wiring 412, the second pattern wiring 212, and the connection wiring 422 can be electrically connected.

With such a structure, manufacturing labor can be saved, and the connection wiring 422 and the first pattern wiring 211 to which a high-frequency signal is transmitted and the integrated controller 5 do not intersect three-dimensionally. And noise can be reduced, and a decrease in touch panel detection accuracy due to parasitic capacitance and noise can be suppressed.

On the other hand, in the wiring structure shown in FIG. 7, there is a portion where the second pattern wiring 216 and the connection wiring 422 partially intersect with each other, and the touch panel detection accuracy may slightly decrease in that portion. FIG. 8 shows a liquid crystal display device that can prevent the second pattern wiring and the connection wiring 422 from crossing three-dimensionally and can be easily manufactured. In the liquid crystal display device shown in FIG. 8, the second pattern wiring 217 is laid so as to go around the connection wiring 422 and the connection terminal Tc2. The connection wiring 422 and the connection terminal Tc2 are the same as those shown in FIG.

More specifically, the second pattern wiring 217 is symmetric with respect to the connection wiring 422 and the connection terminal Tc2. The second pattern wiring 217 does not intersect itself, and is formed so that the connection wiring 422 wraps downward in the figure so as not to pass through a region below the connection wiring 422. Thus, by forming the second pattern wiring 217, the connection terminal Tc1 and the connection terminal Tc2 can be arranged on a straight line, and the heating / pressurization process can be simplified. Further, since the connection wiring 422 does not cross three-dimensionally with the first pattern wiring 211, the second pattern wiring 212, and the integrated controller 5, wiring parasitic capacitance and noise can be reduced, and the touch panel due to parasitic capacitance and noise can be reduced. A decrease in detection accuracy can be suppressed.

When the second pattern wiring 217 shown in FIG. 8 is adopted, an area for forming the second pattern wiring 217 so as to wrap around is necessary, and the array substrate 21 becomes large. Therefore, it is preferable to employ the image display device in which the size of the array substrate 21 is less restricted.

The wiring structure shown in FIGS. 2, 7, and 8 may be selected depending on the size of the liquid crystal display device, the structure of the array substrate 21, and the required touch panel detection accuracy. For example, when the size of the array substrate 21 is limited (the area where the wiring is routed is narrow) and high detection accuracy is required for the touch panel, the wiring structure shown in FIG. 2 may be employed. If you want to reduce the size of the array substrate even if the touch panel accuracy is slightly reduced, you can use the wiring structure shown in Fig. 7 and the touch panel detection accuracy regardless of the size of the array substrate. Is necessary, and the wiring structure shown in FIG. In any wiring pattern, it is possible to suppress a decrease in detection accuracy of the touch panel due to parasitic capacitance or noise as compared with the conventional wiring pattern.

In the following embodiments, the same wiring structure as in FIG. 2 is adopted for convenience of explanation, but the same or equivalent wiring structure as shown in FIGS. It goes without saying that is possible.

(Second Embodiment)
Another example of the image display device according to the present invention will be described with reference to the drawings. FIG. 9A is a schematic perspective view of a liquid crystal display device which is another example of the image display device according to the present invention, and FIG. 9B is a schematic view of a state in which an FPC is connected to the liquid crystal display device. The liquid crystal display device B shown in FIG. 9A is provided with a touch panel unit 6 formed integrally with the counter substrate 22 of the liquid crystal panel unit 2 instead of the touch panel unit 3 independent of the liquid crystal panel unit 2. 1 has the same structure as the liquid crystal display device A shown in FIG.

The touch panel unit 6 is formed on the surface on which the common electrode of the counter substrate 22 of the liquid crystal panel unit 2 is formed and the surface on the unit side. The touch panel unit 6 is formed of a transparent thin film, like the common electrode of the counter substrate 22. Thus, by forming the touch panel unit 6 as a thin film on the glass substrate of the liquid crystal panel unit 2, it is possible to shorten the pattern wiring 210 to the TP wiring 61 of the touch panel unit 6, and the connection of the touch panel connection unit 42 of the FPC 4. The length of the wiring 421 can be shortened. Thereby, it is possible to reduce the parasitic capacitance and noise generated in the connection wiring 421, and the detection accuracy in the touch panel unit 6 is increased.

Further, since the liquid crystal panel unit 2 and the touch panel unit 6 are integrally formed, the image display area (not shown) of the liquid crystal panel unit 2 and the detection area 600 of the touch panel unit 6 can be accurately overlapped. Accordingly, the contact position detected by the touch panel unit 6 and the display operation unit can be linked with high accuracy, and the operability can be improved.

Furthermore, since a transparent substrate is not used unlike the touch panel unit 3, light absorption (diffusion) by the transparent substrate does not occur. For this reason, the image displayed on the liquid crystal display device B becomes clear, and the operability is improved accordingly. The liquid crystal display device B can be manufactured in the same process as the liquid crystal display device A, except that the step of attaching the touch panel unit to the liquid crystal panel unit 2 (step S2 in FIG. 4) is unnecessary.

(Third embodiment)
Still another example of the image display device according to the present invention will be described with reference to the drawings. FIG. 10A is a perspective view showing an outline of an organic EL display device which is another example of the image display device according to the present invention, and FIG. 10B is a schematic view showing a state in which an FPC is connected to the organic EL display device. is there.

As shown in FIG. 10A, the organic EL display device C includes an organic EL panel unit 7, an integrated controller 8, and a touch panel unit 6. As shown in FIG. 10A, the organic EL panel unit 7 includes a rear substrate 71 and a front substrate 72, and has an arrangement in which an organic layer (not shown) is disposed between the rear substrate 71 and the front substrate 72. is doing. By passing a current between the back substrate 71 and the front substrate 72, the organic layer is excited and emits light.

On the rear substrate 71, an integrated controller 8 including an EL controller unit 81 that controls the organic EL panel unit 7 and a TP controller unit 82 that controls the touch panel unit 6 is mounted. The pattern wiring 710 formed on the back substrate 71 has the same shape as the pattern wiring 210 formed on the array substrate 21 of the liquid crystal display device A shown in FIG. That is, the first pattern wiring 711 and the second pattern wiring 712 have the same shape and arrangement as the first pattern wiring 211 and the second pattern wiring 712.

The external main controller and the integrated controller 8, and the TP controller unit 82 of the integrated controller 8 and the TP wiring 61 of the touch panel unit 6 are connected by the FPC 4. Here, the FPC 4 includes the EL signal wiring 410 instead of the LCD signal wiring 411, but has substantially the same configuration.

As shown in FIG. 10B, the PFC 4 is attached using the ACF in a state where the integrated controller 8 is mounted on the pattern wiring 710 of the back substrate 72. As a result, the first pattern wiring 711, the EL signal wiring 410, and the TP signal wiring 412 are electrically connected, and the second pattern wiring 723 and the connection wiring 421 of the touch panel connection unit 42 are electrically connected. Further, the connection wiring 421 of the touch panel connection unit 42 is electrically connected to the TP wiring of the touch panel unit 6 using the ACF.

As described above, the organic EL display device C including the touch panel is formed. As described above, even when an organic EL panel unit as well as a liquid crystal panel unit is used as a display device, the connection wiring 421 between the integrated controller and the touch panel unit can be shortened with one FPC. It is possible to prevent the connection wiring 421 of the connection part 42 and other wirings from crossing three-dimensionally. Thereby, the parasitic capacitance and noise of wiring can be reduced, and the fall of the detection accuracy of a touch panel by parasitic capacitance and noise can be suppressed.

The manufacturing process is the same as that of the liquid crystal display device B except for the manufacture of the organic EL panel unit, and a detailed description thereof will be omitted. Further, in the organic EL display device C, the touch panel unit 6 is formed on the front substrate 72 with a transparent thin film, but the touch panel unit 3 manufactured separately from the organic EL panel unit 7 as in the liquid crystal display device A is used as the front substrate. It may be attached to (attached to) 72.

In each of the above-described embodiments, the capacitance detection type touch panel is described as an example of the touch panel unit. However, the touch panel unit is not limited to this, and other types, for example, a resistive film type, a surface acoustic wave type, etc. It may be.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

The image display device according to the present invention can be used as a display unit of a mobile phone, a portable information terminal, a tablet PC, a navigation device, a game machine, or a home appliance device.

1 backlight unit 2 liquid crystal panel unit 21 array substrate 210 pattern wiring 211 first pattern wiring 212 second pattern wiring 213 LCD wiring 214 TP wiring 22 counter substrate 23 source driver 24 gate driver 3 touch panel unit 31 TP wiring 4 FPC
41 Main connection part 411 LCD signal wiring 412 TP signal wiring 42 Touch panel connection part 421 Connection wiring 5 Integrated controller 51 LCD controller part 52 TP controller part 6 Touch panel part 61 TP wiring 7 Organic EL panel unit 71 Rear substrate 710 Pattern wiring 711 First 1 pattern wiring 712 2nd pattern wiring 713 EL signal wiring 714 TP signal wiring 72 Front substrate 8 Integrated controller 81 EL controller section 82 TP controller section

Claims

An image display unit comprising a substrate with wiring formed on the surface;
A touch panel disposed on the front side of the image display unit;
A control unit mounted on the substrate and controlling the image display unit and the touch panel;
The control unit and an external device, and the FPC for electrically connecting the control unit and the touch panel;
The wiring is formed such that the first pattern wiring connected to the control unit and the control unit and the first pattern wiring and the control unit do not exist in a region between the touch panel and the touch panel. Pattern wiring,
The signal wiring that electrically connects the first pattern wiring and the external device and the connection wiring that electrically connects the second pattern wiring and the touch panel are formed in the same FPC. Image display device.
2. The image display device according to claim 1, wherein the FPC includes a main connection portion in which the signal wiring is formed and a touch panel connection portion in which the connection wiring is formed.
The control unit has a rectangular shape in front view, the first pattern wiring extends in a short direction of the control unit, and the second pattern wiring extends in a longitudinal direction of the control unit. Item 3. The image display device according to Item 2.
The touch panel is formed by arranging transparent electrodes on the surface of a transparent substrate,
The image display device according to claim 1, wherein the touch panel is attached and fixed to a front side of the image display unit.
The image display device according to any one of claims 1 to 3, wherein the touch panel is formed of a thin film on a front surface of the image display unit.
The said image display part is a liquid crystal panel unit, and while the said wiring is formed in the board | substrate of the back side among two glass substrates which pinch | interpose a liquid crystal layer, the said control part is mounted. An image display device according to claim 1.
The image display device according to any one of claims 1 to 5, wherein the image display unit is an organic EL panel unit, the wiring is formed on a back substrate, and the control unit is mounted.