JP2012113216A - Display device, manufacturing method thereof, and display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which workability and yield are improved by eliminating the need for wiring extract of wiring between each pixel and a driving control circuit.SOLUTION: A driving control circuit 10 is disposed between a plurality of adjacent pixels 8, and a front substrate 7 and a rear substrate 6 are bonded to each other while sandwiching the pixels 8, the driving control circuit 10, wiring 11 for connecting the driving control circuit 10 and each pixel 8, and an electrode terminal 12 of the driving control circuit 10. An opening 5 is provided in the rear substrate 6 at a position corresponding to the electrode terminal 12 so as to expose the electrode terminal 12, and wiring is extracted from the electrode terminal 12 exposed at the opening 5 to be connected to a video signal output circuit 4.

Description

  The present invention relates to, for example, a display device used for a large display (tiling display) configured by arranging a large number of liquid crystal display (LCD) panels, plasma display panels (PDP), electroluminescent (EL) display panels, and the like. The present invention relates to a manufacturing method and a display.

  2. Description of the Related Art In recent years, a large-scale display has become a mainstream method in which a large number of light emitting diodes (LEDs) are arranged. In such a large display of the LED system, as the resolution is increased, the LED arrangement density is increased and the cost is increased. On the other hand, in order to realize a tiling display at a low price, there is a method in which a plurality of flat displays (for example, LCD panels, PDPs, EL display panels, etc.) as a display device (or display unit) are arranged in a matrix. It is valid.

  A conventional display device that constitutes such a large display has a front substrate and a back substrate made of a glass plate or the like (Patent Document 1). The front substrate and the back substrate are opposed to each other with a predetermined interval, and a plurality of pixels and a plurality of electrodes for controlling them are arranged between them, and a light emitting layer or a liquid crystal layer is formed to seal the periphery. Sealed with a stop. A control signal including a scanning signal and a data signal is applied to the plurality of electrodes from the drive control circuit. The wiring extraction method for applying the control signal to these electrodes is around the display device, that is, adjacent to the display device. A stepped portion is provided in the joint portion of the display device, and an end face wiring extraction method (FIG. 3 of Patent Document 1) for connecting the wiring to the electrode terminal of the stepped portion, and a groove portion is provided at the center by dividing the back substrate. There is a center wiring extraction system in which wiring is provided on electrode terminals provided in the groove (FIG. 1 of Patent Document 1). As a method of connecting the wiring to the electrode terminal by these connection methods, an anisotropic conductive film, a conductive paste using Ag, Cu, carbon, or the like, or solder is used, and an external drive control circuit is connected from the electrode terminal. Up to electrical connection.

JP 2008-191502 A (FIGS. 1 and 3)

  In conventional wiring extraction, a drive control circuit is provided outside, and for each pixel having RGB arranged in a matrix in the vertical and horizontal directions in the panel, at least the number of pixels in one row and the number of pixels in one column It is necessary to provide an electrode terminal corresponding to 1 and to provide wiring corresponding to the electrode terminal for applying a control signal such as a scanning signal or a data signal. However, in this method, it is necessary to take out wirings according to the number of vertical and horizontal pixels. Since the number of wirings is increased, the manufacturing method becomes complicated, resulting in poor workability and a decrease in yield. Further, when the pixel pitch is narrowed, the density of the number of wires taken out increases, and the wiring pitch becomes narrow, which makes it difficult to take out the wires.

  The present invention has been made to solve these problems, and by arranging a drive control circuit between a plurality of adjacent pixels, wiring between each pixel and the drive control circuit is not required to be taken out. Therefore, an object of the present invention is to provide a display device, a manufacturing method thereof, and a display which can improve workability and yield, and therefore can easily extract wiring between a drive control circuit and a video signal output circuit even when the pixel pitch is small. Yes.

  The display device according to the present invention includes a front substrate, a back substrate facing the front substrate, and a plurality of display or non-display states that are arranged in a matrix between the front substrate and the back substrate. A plurality of drive control circuits that control driving of the pixels, a plurality of wirings that connect the drive control circuit and the pixels, and a plurality of electrode terminals of the drive control circuit to which video signals are input The drive control circuit is disposed between a plurality of adjacent pixels, and the front substrate and the back substrate connect the pixels, the drive control circuit, the drive control circuit, and the pixels. The wiring and the electrode terminal of the drive control circuit are bonded to each other, and the back substrate is provided with an opening so that the electrode terminal is exposed at a position corresponding to the electrode terminal. Wiring from the electrode terminal is that to be connected to the retrieved video signal output circuit.

The display device according to the present invention is arranged in a matrix form between a front substrate, a protective film formed on the front substrate, and the front substrate and the protective film, and is in a display or non-display state. A plurality of selected pixels, a plurality of drive control circuits for controlling driving of the pixels, a plurality of wirings for connecting the drive control circuit and the pixels, and a plurality of the drive control circuits for inputting video signals The drive control circuit is disposed between a plurality of adjacent pixels, and the front substrate and the protective film include the pixels, the drive control circuit, the drive control circuit, and the respective The wiring connecting the pixel and the electrode terminal of the drive control circuit are sandwiched, and the protective film is provided with an opening so that the electrode terminal is exposed at a position corresponding to the electrode terminal. Exposed electrode Wiring from the child is taken out is obtained so as to be connected to the video signal output circuit.
Further, the display according to the present invention is a large-sized display device in which a plurality of the display devices are arranged in a matrix.
In the display device manufacturing method according to the present invention, the drive control circuit is a drive control integrated circuit, and the drive control integrated circuit is connected to the pixels by thermocompression bonding with an anisotropic conductive film. It is made to connect.

According to the display device of the present invention, by arranging the drive control circuit between a plurality of adjacent pixels, the wiring between each pixel and the drive control circuit is not required to be taken out, and the workability and the yield can be improved. As a result, even when the pixel pitch is small, the wiring between the electrode terminal of the drive control circuit and the video signal output circuit can be easily taken out.
In addition, by using a protective film as the back substrate, the opening of the protective film corresponding to the electrode terminal of the drive control circuit to which the video signal is input can be formed relatively easily with a small step, and exposed through the opening. The manufacturing cost can be reduced by reducing the number of manufacturing steps when the wiring is taken out from the electrode terminals, and the quality of the wiring extraction part can be improved.
In addition, since the number of wiring extractions as a whole can be reduced, the non-display area serving as the joint can be reduced, and the joint width between the display devices can be reduced. Therefore, the discontinuity of the pixel pitch between the display devices, which causes the deterioration of the image quality, is improved, and a tiling display with improved display quality can be provided.

It is a top view which shows the display apparatus in Embodiment 1 of this invention. 3 is a perspective view showing a display device in Embodiment 1. FIG. FIG. 6 is a perspective view showing another display device in the first embodiment. 3 is a plan view showing the pixel arrangement and the formation position of a drive control circuit in Embodiment 1. FIG. FIG. 3 is an enlarged plan view showing a relationship between a pixel and a collective pixel in the first embodiment. 3 is a cross-sectional view showing various openings in the display device of Embodiment 1. FIG. 10 is a perspective view illustrating a display device in Embodiment 2. FIG. It is sectional drawing which looked at the opening part in Embodiment 2 to the A direction.

Embodiment 1 FIG.
1 is a plan view showing a display device according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing the display device in the first embodiment. FIG. 3 is a perspective view showing another display device in the first embodiment. FIG. 4 is a plan view showing the pixel arrangement and the formation position of the drive control circuit in the first embodiment. FIG. 5 is an enlarged plan view showing a relationship between a pixel and a collective pixel, which is another example in the first embodiment. Note that, in each drawing in the drawings, the same reference numerals indicate the same or corresponding parts, and description thereof is omitted. A large number of display devices are arranged in a matrix to form a flat screen display with an enlarged screen. Examples of the display device include an LCD panel, a PDP, and an EL display panel. 1, 2, and 3 show the display device viewed from the back side (back substrate 6 side), and light is emitted from the front substrate 7 side.

  In Embodiment 1, a manufacturing method of a bottom emission type organic EL display panel will be described below as an example of a display device used for a tiling display. The organic EL display panel 1 has a front substrate 7 and a back substrate 6 facing the front substrate 7. Between the front substrate 7 and the back substrate 6, pixels 8 each having a set of RGB pixels are arranged in a matrix. The display panel 1 includes a plurality of collective pixels 13 in which two or more pixels 8 adjacent in a row or column direction are gathered, an active element 9 that controls the display state of the pixels 8 corresponding to each pixel 8, A plurality of drive control circuits 10 (10a, 10b) arranged between the collective pixels 13 or between the pixels 8 and controlling the drive of the active elements 9, and a plurality of wirings connecting the drive control circuit 10 and the active elements 9 of the respective pixels 8 11a, a plurality of wirings 11b connecting the active elements 9 of each pixel 8, and a plurality of electrode terminals 12 for inputting a video signal from the outside to the drive control circuit 10.

  A front substrate 7 and a rear substrate 6 are configured by being bonded together with a pixel 8, an active element 9, a drive control circuit 10, wirings 11 (including 11a and 11b) and an electrode terminal 12 interposed therebetween. 2 is a flexible substrate, 3 is a connector, 4 is a video signal output circuit, and 5 is an opening.

  As the active element 9 (specifically, an active element provided for each RGB pixel) formed in each pixel 8, a TFT or the like generally used for an active LCD panel or an active organic EL display panel is used. However, it is only necessary that the display state of the pixel 8 can be controlled, and the manufacturing method and the position where the pixel 8 is arranged are not particularly limited. Similarly, for the drive control circuit 10, a manufacturing method for forming the active element 9 formed in each pixel 8 simultaneously with the manufacturing process of the active element 9 has been widely known and has a function of controlling the driving of each pixel 8. The manufacturing method is not particularly limited as long as it is present. In addition, the electrode terminal 12 is not particularly limited with respect to the formation method and material, and for example, may be formed simultaneously with the same material as a part of the pixel 8.

Next, the arrangement of the pixels 8 and the formation position of the drive control circuit 12 in Embodiment 1 will be described with reference to FIGS. 4 and 5 show the display element viewed from the surface (light emitting surface) on the front substrate 7 side. The pixels 8 are arranged at a so-called unequal pitch in which the interval T1 between the collective pixels 13 and the collective pixels 13 is wider than the interval T2 between the pixels 8 and 8. Accordingly, an area for disposing the drive control circuit 10 can be secured between the collective pixels 13 and the collective pixels 13, and the drive control circuit 10 is formed in a non-light emitting area between the collective pixels 13, so that the LCD For example, the luminance is not reduced due to the reduction of the light emitting area corresponding to the aperture ratio. A drive control circuit 10 may be formed between the pixels 8.
As shown in FIG. 4, the drive control circuit 10a is arranged between the collective pixels 13 in the column direction, and the drive control circuit 10a is provided with electrode terminals 12 (eight in FIG. 4). The drive control circuit 10b is disposed between the collective pixels 13 in the row direction, and the drive control circuit 10b is provided with electrode terminals 12 (four in FIG. 4). The drive control circuit 10 is an expression including the drive control circuits 10a and 10b.

  A method for manufacturing the bottom emission organic EL element in the first embodiment will be described. A bottom emission type organic EL element generally has a transparent front substrate, a transparent electrode such as ITO, an auxiliary electrode for reducing the wiring resistance of the transparent electrode, and a pixel separated to cover the auxiliary electrode. A pixel is formed by sequentially stacking an insulating film formed in this manner, an organic layer composed of a hole transport material layer, a light emitting layer, an electron transport layer, and the like, and a reflective electrode (for example, Al). Light from the light emitting layer passes through the transparent electrode and is emitted from the front substrate side. The pixel electrode (transparent electrode) and the reflective electrode are not particularly limited with respect to the formation method and materials. Similarly, the formation method and material of the auxiliary electrode are not limited, and a low resistance metal such as Al, Cr, or Ag may be laminated to reduce the resistance.

  Next, a manufacturing method of the bottom emission type organic EL display panel (display device) in the first embodiment will be described. The organic EL display panel uses glass for the front substrate 7 and the back substrate 6, and a recess is formed on the back substrate 6 on the side facing the organic EL element formation surface of the front substrate 7 by etching or sandblasting. Then, the concave surface of the back substrate 6 and the organic EL element formation surface of the front substrate 7 are bonded to face each other.

  Both substrates are bonded together with an adhesive or the like at the sealing portion to make it difficult for moisture to enter the sealing space, and the sealing space between the two substrates by the concave portion provided on the back substrate 6 has moisture or the like. A desiccant is installed in order to protect the organic EL element from deterioration factors.

  As shown in FIGS. 2 and 4, the back substrate 6 has openings 5 so that the electrode terminals 12 are exposed at positions corresponding to the electrode terminals 12 of the drive control circuits 10 a and 10 b provided between the collective pixels 13. The electrode terminal 12 and the external video signal output circuit 4 are electrically connected through the connector 3 by a metal wiring 14 or the like. The opening 5 is formed by a method such as etching, sand blasting, or dicing. In FIG. 3, the opening 5 corresponding to the electrode terminal 12 of the drive control circuits 10a and 10b has a groove shape.

  FIG. 6 is a cross-sectional view showing various openings in the display device of the first embodiment. As shown in FIG. 6A, the upper part of the opening 5 of the back substrate 6 is formed with the same width as the lower part. However, in order to facilitate the connection process from the electrode terminal 12, FIG. As shown in the figure, the upper part may have a V-shaped cross-section that is wider than the lower part, and may have a step shape as shown in FIG. 6C. The shape is not particularly limited. . The sectional view of the opening 5 corresponding to FIGS. 1 and 2 is, for example, FIG. 6A, and the sectional view of the opening 5 corresponding to FIG. 3 is, for example, FIG. 6B or FIG. It is.

  The periphery of these openings 5 is sealed with an adhesive or the like at the sealing portion. The metal wiring 14 connected to the electrode terminal 12 exposed at the opening 5 is connected to the video signal output circuit 4 via the connector 3. In the first embodiment, the metal wiring 14 between the electrode terminal 12 and the video signal output circuit 4 and the portion where the electrode terminal 12 is exposed may be covered with a moisture-proof coating agent. As a result, the occurrence of defects such as electrical corrosion and ion migration in the exposed metal portion can be suppressed. As the moisture-proof coating agent, commercially available materials can be used, and any material having an insulating and moisture-proof function may be used, and the material and type thereof are not limited. Moreover, the thickness to form and the formation method are not specifically limited, What can harden | cure by an ultraviolet-ray, a heat | fever, moisture, or natural drying can be used.

  Next, a method for forming the metal wiring connecting the electrode terminal 12 of the opening 5 and the connector 3 of the video signal output circuit 4 in Embodiment 1 using a conductive paste and a flexible substrate will be described. The flexible substrate 2 is preliminarily formed with wiring according to the number of outputs of the video signal output circuit 4, and metal wiring is formed at the portion (end portion of the flexible substrate) connected to the conductive paste 17 (FIG. 6) and the connector 3. 14 is exposed, and the exposed portion is treated to prevent corrosion such as Au plating. The flexible substrate 2 is fixed to the back substrate 6 using a thermosetting film adhesive.

  The flexible substrate 2 may be any substrate as long as it is generally used for LCD panels, PDPs, and EL display panels, and there are no particular limitations on the material or thickness of the flexible substrate 2. Further, the flexible substrate 2 is a substrate in which the metal wiring 14 is sandwiched between the polyimide films on both sides and may be fixed to the back substrate 6 with an adhesive material, and a thermosetting film is used as an adhesion method. It is not limited to methods and materials. Thereafter, the conductive paste 17 is formed using a dispenser coating method so as to connect between the electrode terminal 12 and the exposed metal wiring 14 at the end of the flexible substrate 2 through the opening 5 of the organic EL display panel. The conductive paste 17 is cured by heat treatment.

  The conductive paste 17 is not particularly limited to a forming method and a connection material, and may have a function of electrically connecting the electrode terminal 12 and the metal wiring 14 of the flexible substrate 2 through the opening 5. For example, a paste material made of Ag, Cu, carbon, or the like can be used. In addition to the method using the conductive paste 17, the same function can be obtained by a connection method using, for example, wire bonding, solder, anisotropic conductive film, etc., but the conductive paste 17 is applied to the electrode terminal 12 through the opening 5. Since it can be electrically connected relatively easily, it can be said to be a preferable method.

  The method for forming the conductive paste 17 has been described by taking dispenser application as an example, but it can also be formed by, for example, a method using pressure film printing or a method using inkjet. The metal wiring 14 at the other end of the flexible substrate 2 that is not in contact with the conductive paste 17 is connected to the external video signal output circuit 4 via the connector 3. The connection between the flexible substrate 2 and the video signal output circuit 4 is not particularly limited as long as it is electrically connected.

  As described above, according to the display device of the first embodiment, by arranging the drive control circuit between a plurality of adjacent pixels, wiring between each pixel and the drive control circuit becomes unnecessary. Workability and yield can be greatly improved. Since it is not necessary to take out the wiring between each pixel and the drive control circuit, it is easy to take out the wiring between the electrode terminal of the drive control circuit and the video signal output circuit even when the pixel pitch is small. In addition, it is possible to take out wiring using metal wiring that is relatively easy to form with respect to the electrode terminals of the drive control circuit. In addition to greatly improving workability and yield, high definition with a narrow pixel pitch is also possible. A display device with high display quality can be provided.

  In addition, since the number of wiring extractions as a whole can be reduced, the non-display area serving as the joint can be reduced, and the joint width between the display devices can be reduced. Therefore, the discontinuity of the pixel pitch between the display devices, which causes the deterioration of the image quality, is improved, and a tiling display with improved display quality can be provided. Note that the organic EL display panel of Embodiment 1 also has a feature that power consumption can be reduced because the wiring length between each pixel and the drive control circuit is shortened.

Embodiment 2. FIG.
FIG. 7 is a perspective view showing the display device in the second embodiment. Instead of the glass back substrate, the organic EL element is sealed with a protective film 16 formed of an inorganic film. Although it is conceivable that a drive control circuit is disposed on or outside the protective film 16 formed of an inorganic film and the drive control circuit and each pixel are connected by wiring, in the second embodiment, the glass product of the first embodiment is used. Instead of the back substrate 6, the organic EL element is sealed with a protective film 16 formed of an inorganic film. Accordingly, the drive control circuit 10 is disposed between the plurality of adjacent pixels 8. The protective film 16 is generally made of an inorganic film such as SiN or SiON. However, the protective film 16 only needs to have a function of preventing moisture from entering as in the case of the back substrate 6. For example, a resin film, a resin film, an inorganic film, etc. A resin film on which a film is formed, a very thin glass substrate, or the like can be used, and the formation method and material thereof are not particularly limited. The opening 5 corresponding to the electrode terminal 12 provided in the protective film 16 is opened by, for example, an etching method or a masking method when forming SiN when the opening 5 is provided in SiN. The most suitable opening method may be used.

As for the wiring extraction method, as in the first embodiment, there is a method using a flexible substrate and a conductive paste bonded to the protective film 16. 8 is a cross-sectional view of the opening 5 shown in FIG. 7 when viewed in the A direction. In addition to the method using the flexible substrate 2 having the metal wiring 14 and the anisotropic conductive film 18, the method using the flexible substrate 2 having the metal wiring 14 and wire bonding, the flexible substrate 2 having the metal wiring 14 and solder, etc. Can do. Since the protective film 16 is thinner than the back substrate made of glass and the step of the opening 5 can be reduced, restrictions on the wiring extraction method and wiring extraction position are reduced, so that the flexible substrate, anisotropic conductive film, wire Electrical connection can be obtained relatively easily by bonding and soldering.
Further, in the method using the flexible substrate 2 having the metal wiring 14 and the anisotropic conductive film 18, the non-display area serving as the joint can be reduced and the joint width between the display apparatuses can be reduced. In the case of a ring display, a discontinuity in pixel pitch between display devices that causes a deterioration in image quality is improved, and a tiling display with improved display quality can be obtained.

  By configuring in this way, the glass back substrate can be eliminated, the step of the wiring extraction part can be greatly reduced, no special tool for compensating the step is required, and the manufacturing cost can be reduced by reducing the number of manufacturing steps. At the same time, the quality of wiring extraction can be improved. In addition, since there is no restriction on the formation place of the wiring extraction part, the wiring can be extracted relatively easily by an arbitrary place and an arbitrary method, and the openings can be manufactured at a narrow pitch. Suitable for tiling displays.

Embodiment 3 FIG.
In the display device using the organic EL display panel in the third embodiment, the active element for controlling the display state of the pixels is provided in the drive control circuit arranged between the collective pixels in the first or second embodiment. With this configuration, an active element is not required at the pixel position of the organic EL display panel, so that in addition to the effects of the first and second embodiments, the light emitting area can be increased and the visibility is improved. Become.

Embodiment 4 FIG.
In the display device using the organic EL display panel in the fourth embodiment, the active element formed by a thin film formation process such as a TFT is used in the drive control circuit arranged between the collective pixels in the first, second, or third embodiment. Instead, a separately manufactured drive control integrated circuit (IC) is arranged between the collective pixels, and is connected to wiring connected to each pixel by a thermocompression bonding method using an anisotropic conductive film. With this configuration, the manufacturing method of the organic EL display panel can be simplified, and in addition to the effects of the first, second, and third embodiments, the yield can be improved and a high-definition organic EL display panel can be manufactured at a low cost. Obtainable.
Although the embodiments of the display device using the organic EL display panel have been described above, it goes without saying that the present invention can be similarly applied to an LCD panel and a PDP.

DESCRIPTION OF SYMBOLS 1 Organic EL display panel 2 Flexible substrate 3 Connector 4 Video signal output circuit 5 Opening 6 Back substrate 7 Front substrate 8 Pixel 9 Active element 10 Drive control circuit 11 Wiring 12 Electrode terminal 13 Collective pixel 14 Metal wiring 16 Protective film 17 Conductive paste 18 Anisotropic conductive film

Claims (7)

A front substrate and a back substrate facing the front substrate;
A plurality of pixels that are arranged in a matrix between the front substrate and the back substrate, and a display or non-display state is selected;
A plurality of drive control circuits for controlling driving of the pixels;
A plurality of wirings connecting the drive control circuit and the pixels;
A plurality of electrode terminals of the drive control circuit to which a video signal is input;
The drive control circuit is disposed between a plurality of adjacent pixels,
The front substrate and the back substrate are configured by bonding the pixel, the drive control circuit, the wiring connecting the drive control circuit and each pixel, and the electrode terminal of the drive control circuit,
The back substrate is provided with an opening so that the electrode terminal is exposed at a position corresponding to the electrode terminal, and a wiring is taken out from the electrode terminal exposed at the opening and connected to a video signal output circuit apparatus. A front substrate and a protective film formed on the front substrate;
A plurality of pixels arranged in a matrix between the front substrate and the protective film and selected to be in a display or non-display state;
A plurality of drive control circuits for controlling driving of the pixels;
A plurality of wirings connecting the drive control circuit and the pixels;
A plurality of electrode terminals of the drive control circuit to which a video signal is input;
The drive control circuit is disposed between a plurality of adjacent pixels,
The front substrate and the protective film are configured to sandwich the pixel, the drive control circuit, the wiring connecting the drive control circuit and each pixel, and the electrode terminal of the drive control circuit,
The protective film is provided with an opening so that the electrode terminal is exposed at a position corresponding to the electrode terminal, and a wiring is taken out from the electrode terminal exposed at the opening and connected to a video signal output circuit apparatus.   The active element for controlling the display state of each pixel is provided in each pixel, and the active element of each pixel and the drive control circuit are connected. Display device.   The display device according to claim 1, wherein an active element that controls a display state of each pixel and that corresponds to each pixel is provided in the drive control circuit.   The display device according to claim 1, wherein the drive control circuit is arranged between a collective pixel formed by a plurality of the pixels and a collective pixel adjacent to the collective pixel.   A display that is enlarged by arranging a plurality of display devices according to claim 1 in a matrix. A front substrate and a protective film formed on the front substrate;
A plurality of pixels arranged in a matrix between the front substrate and the protective film and selected to be in a display or non-display state;
A plurality of drive control circuits for controlling driving of the pixels;
A plurality of wirings connecting the drive control circuit and the pixels;
A plurality of electrode terminals of the drive control circuit to which a video signal is input;
The drive control circuit is disposed between a plurality of adjacent pixels,
The front substrate and the protective film are configured to sandwich the pixel, the drive control circuit, the wiring connecting the drive control circuit and each pixel, and the electrode terminal of the drive control circuit,
The protective film is provided with an opening so that the electrode terminal is exposed at a position corresponding to the electrode terminal, and a wiring is taken out from the electrode terminal exposed at the opening and connected to the video signal output circuit. ,
The method for manufacturing a display device, wherein the drive control circuit is a drive control integrated circuit, and the drive control integrated circuit is connected to the wiring connected to the pixel by a thermocompression bonding method using an anisotropic conductive film.

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