JP2008009054A - Display device and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device in which a display element and components arranged on the visual recognition side of the display element can be easily aligned with high accuracy, and its manufacturing method. <P>SOLUTION: The display device 100 in one embodiment of this invention includes the display element 20, a touch panel 10 which is arranged on the display surface side of the display element 20 and has an effective area 33, i.e. a transmission region provided in correspondence to a display region 27 of the display element 20, and an adhesive layer 14 which bonds the display element 20 and the touch panel 10. The touch panel 10 has an alignment mark 41 provided within the effective area 33. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a display device and a manufacturing method thereof, and more particularly to a display device including a part having a transmission region arranged on the viewing side of the display device and a manufacturing method thereof.

  In recent years, a display device using a transparent touch panel that is arranged on a display surface of a display element and that is directly pressed by a user's finger to perform an input operation such as a desired function selection has been put into practical use. In particular, when portability and operability are regarded as important, such as mobile terminals and bank terminals, touch panels are widely used instead of keyboards. Since the input method using the touch panel can be directly input by the user according to the display screen, it does not require knowledge or skill of a computer, and the operability is very good.

  A display device including such a transparent touch panel is provided so that display contents displayed on the display element can be visually recognized through a touch panel arranged on the viewing side of a display element such as a liquid crystal display element. Various methods such as a resistive film method, a capacitance method, and an ultrasonic method have been developed as a touch panel method.

In a display device with a touch panel, it is necessary to align the display area of the display element and the input area of the touch panel with high accuracy so that an accurate input operation can be performed. Conventionally, the alignment between the display element and the touch panel has been performed by performing edge alignment that aligns the outer edges of the display element and the touch panel (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 7-160423

  However, in this edge alignment, there is a limit in alignment between the display area of the display element and the input area of the touch panel due to the tolerance of parts such as the display element and the touch panel or the accuracy of mechanical alignment. If there is a difference between the position of the display area of the liquid crystal element and the input area of the touch panel, there is a problem that an input error is caused or a recognition error is induced when an input operation is performed in cooperation with display information.

  Further, as a method of aligning the display element and the touch panel, a method of providing alignment marks outside the display area of the display element and outside the input area of the touch panel and matching both may be considered. However, in this case, it is necessary to form an alignment mark corresponding to the display element and the touch panel on a one-to-one basis. Further, since the alignment mark is visually recognized from the appearance of the product, a coating process for hiding the alignment mark may be necessary. For this reason, there existed a problem that a manufacturing process increased. Furthermore, when a touch panel is incorporated into a ready-made display element, alignment may not be performed with the alignment mark.

  The present invention has been made against the background of such circumstances, and an object of the present invention is to provide a display that can easily align a display element and a component arranged on the viewing side of the display element with high accuracy. An apparatus and a method for manufacturing the same are provided.

  A display device according to a first aspect of the present invention includes a display element, a component that is disposed on a display surface side of the display element and includes a transmissive area provided corresponding to the display area of the display element, and the display The display device includes an element and an adhesive that bonds the component, and the component has an alignment mark provided in the transmission region. Thereby, a display element and components can be aligned with high precision.

  In the display device according to a second aspect of the present invention, in the above display device, the alignment mark is disposed on a surface side of the component facing the display element. Thereby, a display element and components can be aligned with high precision.

  In the display device according to the third aspect of the present invention, in the display device described above, the transmittance and / or refractive index of the adhesive and the alignment mark are substantially the same. Thereby, deterioration of the visibility due to the alignment mark can be prevented.

  A display device manufacturing method according to a fourth aspect of the present invention includes: a display element; and a component that is disposed on a display surface side of the display element and includes a transmissive area provided corresponding to the display area of the display element. A display device comprising: an alignment pattern displayed on the display element; and alignment based on the alignment pattern and an alignment mark provided in the transmission region of the component; and the display element Glue the parts. Thereby, a display element and components can be aligned with high accuracy by a simple method.

  In the manufacturing method of the display device according to the fifth aspect of the present invention, in the manufacturing method described above, the alignment mark is arranged on the surface side of the component facing the display element to perform alignment. Thereby, a display element and components can be aligned with high precision, and the increase in a manufacturing process can be suppressed.

  A display device manufacturing method according to a sixth aspect of the present invention is the above manufacturing method, wherein the alignment mark is disposed on the surface of the component opposite to the display element to perform alignment, and the display element After bonding the component, the alignment mark is removed. By this manufacturing method, the display element and the component can be aligned with higher accuracy.

  ADVANTAGE OF THE INVENTION According to this invention, the display apparatus which can align a display element and the components arrange | positioned at the visual recognition side of a display element with high precision, and its manufacturing method can be provided.

  Hereinafter, embodiments to which the present invention can be applied will be described. The following description explains the embodiment of the present invention, and the present invention is not limited to the following embodiment.

Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view illustrating an example of a configuration of a display device 100 including a component having a transmissive region according to Embodiment 1. In the present embodiment, a capacitive touch panel 10 will be described as an example of a component having a transmission region. The display device 100 according to the present embodiment includes a display element 20 and a touch panel 10 disposed on the viewing side of the display element 20. The touch panel 10 includes a cover 11, an adhesive layer 12, and an electrode substrate 13 in order from the viewing side. The electrode substrate 13 is formed of two transparent substrates 131 and 132, and the two transparent substrates 131 and 132 are bonded by a sealing material (not shown). The display element 20 and the touch panel 10 are bonded together by the adhesive layer 14. In the present embodiment, the display element 20 is, for example, a liquid crystal display element, and includes a polarizing plate 26, a counter substrate 24, a TFT array substrate 23, a polarizing plate 25, and a backlight unit 22 in order from the viewing side. Yes.

  First, the configuration of the display element 20 will be described. Here, an active matrix liquid crystal display element will be described as an example of a display element. Of course, the display element 20 is not limited to an active matrix liquid crystal display element, and may be a passive matrix liquid crystal display element. Furthermore, the display element 20 is not limited to a liquid crystal display element, and may be another display element such as an organic EL display element.

  The display element 20 performs image display based on the input display signal. The display element 20 includes a liquid crystal display panel 21 and a backlight unit 22. The liquid crystal display panel 21 has a configuration in which liquid crystal is sealed between the counter substrate 24 and the TFT array substrate 23. The counter substrate 24 and the TFT array substrate 23 are made of a transparent glass substrate, for example.

  A plurality of scanning lines are formed on the TFT array substrate 23 at regular intervals. A plurality of signal lines are formed at regular intervals on the scanning lines. The scanning line and the signal line are arranged so as to intersect with each other through an insulating film. A thin film transistor (TFT), which is a switching element, is disposed in the vicinity of the intersection of the scanning line and the signal line. A display signal is supplied from the signal line to the pixel electrode via the TFT. The pixel electrode is formed of a transparent conductive film such as ITO (Indium Tin Oxide), for example. The display area 27 of the liquid crystal display panel 21 is composed of a plurality of pixels arranged in a matrix. The display area 27 is usually formed in a rectangular shape. Further, the liquid crystal display panel 21 is provided with a frame area 28 provided so as to surround the display area 27.

  On the counter substrate 24, for example, a color filter including a black matrix (BM) and R, G, and B colored layers is formed. Each colored layer is formed between BMs and corresponds to a pixel. A counter electrode made of a transparent conductive film such as ITO is formed on the colored layer and BM. Such a TFT array substrate 23 and the counter substrate 24 are bonded to each other through a sealing material.

  Further, a drive circuit (not shown) is connected to the frame region 28 of the liquid crystal display panel 21. The drive circuit outputs various control signals, scan voltages, display voltages, and the like necessary for image display based on display signals input from the outside. The drive circuit may be mounted on the end of the TFT array substrate 23 by COG (Chip On Glass). The alignment state of the liquid crystal changes depending on the voltage between the pixel electrode and the counter electrode. Thereby, the amount of light transmitted through the liquid crystal display panel 21 is adjusted, and display can be performed.

  Polarizing plates 25 and 26 are attached to the outer surfaces of the TFT array substrate 23 and the counter substrate 24, respectively. Thereby, the liquid crystal display panel 21 is formed. Specifically, a polarizing plate 25 is provided on the surface of the TFT array substrate 22 on the non-viewing side. A polarizing plate 26 is bonded to the surface on the viewing side of the counter substrate 24. The polarizing plate 26 and the polarizing plate 25 each have an absorption axis in a predetermined direction. Therefore, the light passing through the polarizing plate 26 or the polarizing plate 25 becomes linearly polarized light. Thus, the display element 20 includes the liquid crystal display panel 21 having a general configuration.

  A backlight unit 22 is provided on the back side of the liquid crystal display panel 21. The backlight unit 22 irradiates the liquid crystal display panel 21 with planar light from the non-viewing side of the liquid crystal display panel 21. As the backlight unit 22, for example, a unit having a general configuration including a light source, a light guide plate, a prism sheet, and the like is used.

  Next, the configuration of the touch panel 10 disposed on the viewing side of the display element 20 will be described. The touch panel 10 is, for example, a capacitive touch panel. As shown in FIG. 1, the touch panel 10 includes a cover 11, an adhesive layer 12, an electrode substrate 13, a first FPC 15, a second FPC 16, and the like.

  Here, the configuration of the electrode substrate 13 having the transparent substrates 131 and 132 will be described with reference to FIGS. FIG. 2 is a diagram showing the configuration of the electrode substrate 13. FIG. 3 is a plan view showing a pattern of electrodes formed on one outer surface of the electrode substrate 13, that is, the outer surface of the upper transparent substrate 131. FIG. 4 is a plan view showing an electrode pattern formed on the other outer surface of the electrode substrate 13, that is, the outer surface of the transparent substrate 132 on the lower side.

  As shown in FIGS. 2 to 4, the electrode substrate 13 has a pair of transparent substrates 131 and 132 made of glass or the like. As shown in FIG. 3, a plurality of first electrodes 31 extending in parallel to each other in the vertical direction are formed on one surface of the transparent substrate 131. In addition, as shown in FIG. 4, a plurality of second electrodes 32 extending in parallel with each other in the horizontal direction are formed on the other surface of the transparent substrate 132. Therefore, as shown in FIG. 2, the first electrode 31 and the second electrode 32 are formed on the electrode substrate 13 so as to intersect each other. That is, the first electrode 31 and the second electrode 32 are arranged so as to be orthogonal to each other with the transparent substrates 131 and 132 interposed therebetween. The first electrode 31 and the second electrode 32 are preferably at least separated from each other in the thickness dimension of the transparent substrate from the viewpoint of stabilizing the capacitance. Therefore, the first electrode 31 formed on the electrode substrate 13 may be disposed on the outer surface side, and the second electrode 32 may be disposed on the inner surface side. Moreover, the reverse may be sufficient.

  A region where the first electrode 31 and the second electrode 32 are formed is an effective area 33. This effective area 33 corresponds to the display area 27 of the display element 20. Therefore, the effective area 33 is formed in the same rectangular shape as the display area 27 of the display element 20. A frame-shaped area outside the effective area 33 is a non-effective area 34. The first electrode 31 and the second electrode 32 formed in the effective area 33 are made of, for example, ITO. Further, the conductive film is not limited to ITO, but may be other transparent conductive films such as IZO and ITZO. Therefore, the effective area 33 of the touch panel 10 is transparent, and the content displayed on the display element 20 can be confirmed via the touch panel 10 from the viewing side. That is, the effective area 33 becomes a transmission region.

  As shown in FIG. 3, a plurality of first electrodes 31 are arranged at regular intervals on the surface of the electrode substrate 13 on the viewing side. A first connection wiring 35 connected to the first electrode 31 is formed in the ineffective area 34. The first connection wiring 35 is connected to the first electrode 31. In FIG. 3, six first connection wirings 35 are formed in order to be connected to the six first electrodes 31. In addition, the number of the 1st electrode 31 and the 1st connection wiring 35 is not restricted to this.

  The first connection wiring 35 is connected to the first electrode 31 at the lower end of the effective area 33. The first connection wiring 35 extends from the lower end of the effective area 33 to the lower end of the transparent substrate 131. For example, the first connection wiring 35 is formed of the same transparent conductive film as the first electrode 31. That is, the first connection wiring 35 extends from the first electrode 31. Although not shown here, a first FPC 15 connected to the first connection wiring 35 is provided at the lower end of the transparent substrate 131.

  On the other hand, as shown in FIG. 4, a plurality of second electrodes 32 are arranged at regular intervals on the surface of the electrode substrate 13 on the non-viewing side. The non-effective area 34 is provided with a second connection wiring 36 connected to the second electrode 32. The second connection wiring 36 is connected to the second electrode 32. In FIG. 4, six second connection wirings 36 are formed to be connected to the six second electrodes 32. In addition, the number of the 2nd electrode 32 and the 2nd connection wiring 36 is not restricted to this.

  The second connection wiring 36 is connected to the second electrode 32 at the right end or the left end of the effective area 33. The second connection wiring 36 extends from the right end or the left end of the effective area 33 to the lower end of the transparent substrate 132. The second connection wiring 36 has a laminated structure of a transparent conductive film and a metal film. For example, the second connection wiring 36 can be formed by the same transparent conductive film as the second electrode 32 and a metal film formed thereon. Of course, the configuration of the second connection wiring 35 is not limited to this. Although not shown here, a second FPC 16 connected to the second connection wiring 36 is provided at the lower end of the transparent substrate 132.

  As shown in FIG. 1, a cover 11 is attached to the viewing side of the electrode substrate 13 with an adhesive layer 12. The cover 11 is made of, for example, a plastic plate having a thickness of 0.8 mm. An adhesive layer 12 is provided between the cover 11 and the electrode substrate 13.

  The adhesive layer 12 is, for example, a double-sided adhesive tape or an adhesive, and bonds the cover 11 and the electrode substrate 13 together. The adhesive layer 12 is formed of, for example, a transparent resin material having a thickness of 175 μm. The adhesive layer 12 is disposed on substantially the entire display area 27.

  A first FPC (Flexible Printed Circuit) 15 and a second FPC 16 are connected to one end of the electrode substrate 13. The first FPC 15 is attached to the viewing side of the electrode substrate 13, that is, the outer surface of the transparent substrate 131, and the second FPC 16 is attached to the counter-viewing side of the electrode substrate 13, that is, the outer surface of the transparent substrate 132. Signals are input / output to / from the electrode substrate 13 by the first FPC 15 and the second FPC 16.

  The touch panel 10 thus formed is attached to the viewing side of the display element 20, that is, the display surface side by an adhesive layer 14. The adhesive layer 14 is, for example, a double-sided adhesive tape or an adhesive, and bonds the display element 20 and the electrode substrate 13 together. The adhesive layer 14 is formed of, for example, a transparent resin material having a thickness of 125 μm. The adhesive layer 14 is also disposed on substantially the entire display area 27.

  Here, the operation of the touch panel 10 will be described. A fixed capacitor is formed at each intersection of the first electrode 31 and the second electrode 32. When the user brings a finger or the like close to the first electrode 31 in the effective area 33 from above the cover 11, the parasitic capacitance between the fingertip and the first electrode 31 and the parasitic capacitance of the human body are connected in parallel to the fixed capacitance. The Rukoto. As a result, the value of the combined capacitance changes, and the voltage across the fixed capacitance changes. By detecting this change in voltage with a detection circuit, the contacted position can be detected. When the user approaches an arbitrary position in the effective area 33 while the display element 20 is performing a predetermined display, processing based on the display is executed.

  An alignment mark 41 is formed in the transmissive area of the touch panel 10. The alignment mark 41 is used when aligning the display area 27 of the display element 20 and the effective area 33 of the touch panel 10. The alignment mark 41 is disposed at a position corresponding to the display area 27 of the display element 20. In the present embodiment, the alignment mark 41 is formed on the surface of the electrode substrate 13 on the non-viewing side, that is, the surface facing the display element 20.

  The alignment mark 41 is a convex portion formed so as to protrude from the electrode substrate 13. The height of the alignment mark 41 is preferably lower than the thickness of the adhesive layer 14. For example, when the thickness of the adhesive layer 14 is 175 μm, the alignment mark 41 is preferably smaller than 175 μm. Therefore, the alignment mark 41 is embedded in the adhesive layer 14.

  The alignment mark 41 may be a recess formed in the electrode substrate 13. In this case, the depth of the recess of the alignment mark 41 is made lower than the thickness of the adhesive layer 14 so that the alignment layer 41 is filled with the adhesive layer 14.

  When the display element 20 and the touch panel 10 are bonded together, a signal is supplied to display the alignment pattern in the display area 27 of the display element 20 and the alignment pattern 41 and the alignment mark 41 formed on the touch panel 10 are displayed. Align. For this reason, the display element 20 and the touch panel 10 can be aligned with high accuracy. As described above, since the positional deviation between the display element 20 and the touch panel 10 can be suppressed, an input error or a recognition error that occurs when an input operation is performed in cooperation with display information displayed on the display element 20. Can be suppressed.

  Further, since the alignment pattern is displayed on the display element 20, it is not necessary to form the alignment pattern on the display element 20. Therefore, the manufacturing cost can be reduced. Further, since it is not necessary to form the alignment mark 41 corresponding to the display element 20 and the touch panel 10 on a one-to-one basis, the touch panel 10 can be easily aligned and incorporated when the alignment pattern is displayed on the ready-made display element 20. be able to.

  For example, the alignment mark 41 can be formed of a transparent material of the transparent substrate 37 constituting the electrode substrate 13. The alignment mark 41 preferably has substantially the same optical characteristics such as refractive index and transmittance as the adhesive layer 14. Thereby, it is possible to prevent deterioration of visibility due to the presence of the alignment mark 41 in the display area 27. Further, since the alignment mark 41 is provided in the display region 27 and is transparent and difficult to visually recognize, it is not necessary to separately provide a coating process or the like for hiding the alignment mark 41, thereby improving productivity.

  Here, with reference to FIGS. 5-8, the manufacturing method of the display apparatus 100 which concerns on this Embodiment is demonstrated. FIG. 5 is a flowchart for explaining a method of manufacturing display device 100 according to the present embodiment. 6 to 8 are manufacturing process diagrams for explaining a process of bonding the display element 20 and the touch panel 10 of the display device 100 according to the present embodiment. 6 and 7, (a) is a plan view of the touch panel 10, and (b) is an AA cross-sectional view of (a). Further, (d) is a plan view of the display element 20, and (c) is a BB cross-sectional view of (d). FIG. 8A is a plan view of the display device 100 in a state where the touch panel 10 and the display element 20 are bonded, and FIG. 8B is a cross-sectional view taken along line AA of FIG.

  First, transparent glass is prepared as the transparent substrate 131, and transparent plastic is prepared as the transparent substrate 132. Then, four convex portions are created on one surface of the transparent substrate 132 to form the alignment mark 41. Thereafter, a transparent conductive film is formed on one surface of the transparent substrate 131, a transparent conductive film is formed on the alignment mark forming surface of the transparent substrate 132, each transparent conductive film is patterned, and the first electrode 31, The two electrodes 32 and the like are provided, and the transparent substrates 131 and 132 are bonded to each other with a sealing material so that the first electrode 31 and the second electrode 32 face the outer surface, thereby forming the electrode substrate 13 (step S101). As a method for forming the transparent conductive film, a DC sputtering method or the like can be used. Thereafter, in the electrode substrate 13, the first FPC 15 is connected to the first connection wiring 35, and the second FPC 16 is connected to the second connection wiring 36 (step S102). The first FPC 15 and the second FPC 16 and the electrode substrate 13 can be connected by thermocompression bonding using an ACF (Anisotropic Conductive Film) or the like. Then, the cover 11 made of glass or the like is attached to the electrode substrate 13 by the adhesive layer 12 (step S103). Thereby, the touch panel 10 is completed.

  And the touch panel 10 and the display element 20 are bonded together by the contact bonding layer 14 (step S104). First, as shown in FIG. 6, the electrode substrate 13 side of the touch panel 10 is disposed to face the display surface side of the display element 20. As described above, the alignment mark 41 is formed on the electrode substrate 13 of the touch panel 10. Thereby, the alignment mark 41 is arrange | positioned at the surface side which opposes the display element 20 of the touch panel 10 like FIG.6 (b), (c). Although not shown here, the adhesive layer 14 is disposed in advance on the entire surface of the display region 27 on the adhesive surface on the viewing side of the display element 20. Note that the adhesive layer 14 may be formed on the touch panel 10 side.

  Then, as shown in FIG. 7D, the alignment pattern 42 is displayed on the display element 20. As described above, since the effective area 33 of the touch panel 10 is transparent, the alignment pattern 42 can be visually recognized through the touch panel 10. Based on the alignment pattern 42 and the alignment mark 41 provided on the touch panel 10, the display area 27 of the display element 20 and the effective area 33 of the touch panel 10 are aligned by image recognition using a CCD camera.

  Therefore, alignment of the touch panel 10 is performed using the pixels formed in the display area of the display element 20. Thereby, the display area 27 of the display element 20 and the effective area 33 of the touch panel 10 can be aligned with high accuracy. And as shown in FIG. 8, the display element 20 and the touch panel 10 are adhere | attached by the contact bonding layer 14 previously provided in the display element 20. As shown in FIG. Thereafter, as shown in FIG. 5, the operation and appearance are inspected (step S115), and the display device 100 is completed. Since the alignment mark 41 formed on the touch panel 10 is a transparent body and is disposed with no gap from the adhesive material 14, even if the alignment mark 41 remains in the display area, display visibility and cosmetics are deteriorated. I will not let you.

Embodiment 2. FIG.
A method for manufacturing display device 100 according to Embodiment 2 of the present invention will be described with reference to FIGS. FIGS. 9-12 is a manufacturing-process figure for demonstrating the alignment process of the display element 20 and the touch panel 10 of the display apparatus 100 which concerns on this Embodiment. 9 and 10, (a) is a plan view of the touch panel 10, and (b) is an AA cross-sectional view of (a). Further, (d) is a plan view of the display element 20, and (c) is a BB cross-sectional view of (d). FIG. 11A is a plan view of the display device 100 in a state where the touch panel 10 and the display element 20 are bonded, and FIG. 11B is a cross-sectional view taken along line AA of FIG. FIG. 12 is a cross-sectional view of the display device 100 after the alignment mark is removed. 9-12, the same code | symbol is attached | subjected to the same component as FIGS. 6-8, and description is abbreviate | omitted.

  In the present embodiment, the difference from the first embodiment is that the alignment mark 41 formed on the touch panel 10 is arranged on the surface of the touch panel 10 opposite to the display element 20 so that the touch panel 10 and the display element 20 are aligned. It is a point to do. The display device 100 according to the present embodiment has substantially the same configuration as that described in the first embodiment except for the alignment mark 41, and thus the description thereof is omitted. Also, the manufacturing method of the display device 100 is substantially the same as that of the first embodiment except for the alignment process of the touch panel 10 and the display element 20, and thus the description thereof is omitted.

  As shown in FIG. 9B, in the present embodiment, alignment mark 41 is formed on the viewing side of touch panel 10. That is, the alignment mark 41 is formed on the surface facing the display element 20 of the touch panel 10 and the surface on the opposite side. That is, the alignment mark 41 is formed on the upper surface of the cover 11.

  In the step of bonding the touch panel 10 and the display element 20 shown in FIG. 5 with the adhesive layer 14 (step S104), as shown in FIG. 9, first, the electrode substrate 13 side of the touch panel 10 is opposed to the display surface side of the display element 20. Arrange to do. Thereby, the alignment mark 41 is arrange | positioned on the surface on the opposite side to the surface facing the display element 20 of the touch panel 10 like FIG.9 (b), (c). Although not shown here, the adhesive layer 14 is disposed in advance on the entire surface of the display region 27 on the adhesive surface on the viewing side of the display element 20.

  Then, as shown in FIG. 10D, the alignment pattern 42 is displayed on the display element 20. As described above, since the effective area 33 of the touch panel 10 is transparent, the alignment pattern 42 can be visually recognized through the touch panel 10. Based on the alignment pattern 42 and the alignment mark 41 provided on the touch panel 10, the display area 27 of the display element 20 and the effective area 33 of the touch panel 10 are aligned.

  Therefore, alignment of the touch panel 10 is performed using the pixels formed in the display area of the display element 20. Thereby, the display area 27 of the display element 20 and the effective area 33 of the touch panel 10 can be aligned with high accuracy. And as shown in FIG. 11, the display element 20 and the touch panel 10 are adhere | attached by the contact bonding layer 14 provided in the display element 20 previously.

  Thereafter, as shown in FIG. 12, the alignment mark 41 protruding to the viewing side of the touch panel 10 is removed. Therefore, in this embodiment, it is not necessary to form the alignment mark 41 with a transparent material. For this reason, the image recognition by the CCD camera is improved, and the display element 20 and the touch panel 10 can be aligned with higher accuracy. The alignment mark 41 can be removed by, for example, a sandblast method. Alternatively, the alignment mark 41 may be formed of a metal film and removed by partial etching after bonding. Note that the alignment mark 41 may be formed on the upper surface of the cover 11 using a peelable adhesive so that the alignment mark 41 can be easily removed. Thereafter, as shown in FIG. 5, the operation and appearance are inspected (step S105), and the display device 100 is completed.

  As described above, according to the present invention, the display element 20 and the touch panel 10 can be easily aligned with high accuracy. Further, it is not necessary to form an alignment pattern on the display element 20, and the manufacturing cost can be reduced. Furthermore, even when the touch panel 10 is incorporated in the ready-made display element 20, the touch panel 10 can be easily aligned by displaying the alignment pattern 42.

  In the above example, the case where the touch panel 10 is formed and then bonded to the display element 20 has been described, but the present invention is not limited to this. For example, the electrode substrate 13 and the cover 11 may be sequentially bonded to the display element 20. In this case, an alignment mark 41 is formed on each of the electrode substrate 13 and the cover 11 so as to correspond to the display area 27. Then, the electrode substrate 13 is aligned based on the alignment mark 41 of the electrode substrate 13 and the alignment pattern 42 displayed on the display element 20. Thereafter, the cover 11 is aligned based on the alignment mark 41 of the cover 11 and the alignment pattern 42 displayed on the display element 20. At this time, the alignment pattern 42 of the display element 20 may be displayed at a different position when the electrode substrate 13 is aligned and when the cover 11 is aligned.

  In the above example, the touch panel 10 has been described as a component having a transmissive region, but the present invention is not limited to this. For example, the present invention can also be applied to a case where a scratch prevention cover is bonded to the display surface side of the display element 20.

3 is a plan view illustrating a configuration of a display device according to Embodiment 1. FIG. 2 is a plan view showing a configuration of an electrode substrate according to Embodiment 1. FIG. 4 is a diagram showing a configuration of an electrode on one outer surface of the electrode substrate according to Embodiment 1. FIG. 3 is a diagram showing a configuration of an electrode on the other outer surface of the electrode substrate according to Embodiment 1. FIG. FIG. 6 is a flowchart for explaining a method for manufacturing the display device according to the first embodiment. FIG. 6 is a manufacturing process diagram for describing a process of bonding the display element of the display device and the input device according to the first embodiment. FIG. 10 is a manufacturing process diagram for describing a process of bonding the display element and the touch panel of the display device according to the first embodiment. 6 is a manufacturing process diagram for describing a process of bonding the display element of the display device and the touch panel according to Embodiment 1. FIG. 10 is a manufacturing process diagram for describing a process of bonding a display element and a touch panel of a display device according to Embodiment 2. FIG. 10 is a manufacturing process diagram for describing a process of bonding a display element and a touch panel of a display device according to Embodiment 2. FIG. 10 is a manufacturing process diagram for describing a process of bonding a display element and a touch panel of a display device according to Embodiment 2. FIG. 10 is a manufacturing process diagram for describing a process of bonding a display element and a touch panel of a display device according to Embodiment 2. FIG.

Explanation of symbols

10 Touch Panel 11 Cover 12 Adhesive Layer 13 Electrode Substrate 131 Transparent Substrate 132 Transparent Substrate 14 Adhesive Layer 15 First FPC
16 Second FPC
20 display element 21 liquid crystal display panel 22 backlight unit 23 TFT array substrate 24 counter substrate 25 polarizing plate 26 polarizing plate 27 display region 28 frame region 31 first electrode 32 second electrode 33 effective area 34 non-effective area 35 first connection wiring 36 Second connection wiring 37 Transparent substrate 38 Insulating layer 41 Alignment mark 42 Alignment pattern

Claims (6)

A display element;
A component disposed on the display surface side of the display element and having a transmission region provided corresponding to the display region of the display element;
A display device comprising an adhesive for bonding the display element and the component,
The display device has an alignment mark provided in the transmission region.   The display device according to claim 1, wherein the alignment mark is disposed on a surface side of the component that faces the display element.   The display device according to claim 1, wherein a transmittance and / or a refractive index of the adhesive and the alignment mark are substantially the same. A method for manufacturing a display device comprising: a display element; and a component that is disposed on a display surface side of the display element and has a transmission region provided corresponding to the display region of the display element,
An alignment pattern is displayed on the display element,
Alignment based on the alignment pattern and an alignment mark provided in the transmission region of the component,
A manufacturing method of a display device for bonding the display element and the component.   The manufacturing method of the display apparatus according to claim 4, wherein the alignment is performed by arranging the alignment mark on a surface side of the component facing the display element. Place the alignment mark on the surface of the component opposite to the display element to perform alignment,
The method for manufacturing a display device according to claim 4, wherein the alignment mark is removed after bonding the display element and the component.

Images