JP2010160745A - Color filter and display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a useful color filter which has a capacitive coupling touch panel function, is capable of detecting a contact position of a contact object on a display screen and is used for a display capable of displaying images. <P>SOLUTION: The color filter 50 includes a substrate 52, a color filter layer 54 having a light blocking part 55 and colored parts 56, and electrode parts 60 and 70 disposed on the side of the color filter layer which is opposed to the substrate. The light blocking part 55 is conductive and is grounded. The light blocking part 55 is insulated from the electrode parts. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a color filter used in a display device having a capacitively coupled touch panel function and capable of detecting a touch (touch) on a display surface and capable of displaying an image, a method of manufacturing the color filter, and The present invention also relates to a display device having a capacitively coupled touch panel function and capable of detecting a touch (touch) on a display surface and displaying an image.

  Currently, a touch panel is widely used as an input means for various devices in which a display device having a display panel such as a liquid crystal panel is incorporated, for example, a ticket vending machine, an ATM device, a mobile phone, a game machine or the like. The touch panel is usually manufactured separately from the display panel, and is disposed on the display panel (for example, Patent Document 1).

Various methods are employed as a method of detecting the contact position of a contact object (finger, pen, etc.) on the display surface on the touch panel. As a widely used system, there is a resistive film system having two conductive films arranged so that an air layer is formed between them. In a resistive film type touch panel, a contact position on a display surface can be detected by partially conducting two conductive films by contact of a contact object.
JP 2006-23904 A

  However, when the touch panel is placed on the display panel, light is reflected not only on the surface on the most observer side (in this case, the surface of the touch panel) but also on the interface between the touch panel and the display panel (interface with the atmosphere). To get. As a result, more ambient light (external light) such as illumination light is reflected and the contrast is lowered, and the transmittance of image light displayed on the display panel is lowered.

  In particular, in a resistive film type touch panel, light reflection at the interface between the air layer and the conductive film becomes significant due to the refractive index difference between the air layer and the conductive film between the two conductive films. For this reason, a decrease in contrast and a decrease in the transmittance of image light become significant. In contrast, the capacitively coupled touch panel disclosed in Patent Document 1 does not require an air layer. Therefore, the capacitive coupling type touch panel can display an image with superior image quality as compared with the resistive film type touch panel. However, even for a display device to which this capacitively coupled touch panel is bonded, at present, the transmittance and contrast of image light have not been evaluated to be sufficient, and further improvements are required.

  In recent years, flat panel displays having a thin display panel are widely used as display devices. However, when a separate touch panel is stacked on the display panel, there is a problem that the thickness of the entire display panel is increased.

  Further, with respect to various performances and the like for the current touch panel, for example, there is a demand for improvement in sensitivity to input, display panel thickness, manufacturing cost, and the like.

  The present invention has been made from such a viewpoint, and is used for a display device that has a capacitive touch panel function and can detect a contact position of a contact object on a display surface and display an image. An object of the present invention is to provide a useful color filter and a useful display device having a capacitive touch panel function and capable of detecting a contact position of a contact object on a display surface and displaying an image. Yes.

  A color filter according to the present invention is a color filter used in a display device having a capacitively coupled touch panel function and capable of detecting contact with a display surface, and has a predetermined pattern that defines a base material and an opening. A color filter layer having a light-shielding part formed in the above, a colored part formed in the opening, and the color filter layer provided between the color filter layer and the base material, or the color filter of the base material An electrode portion provided on a side opposite to the layer and configured to be electrically connected to a circuit for detecting the contact when incorporated in the display device, and the color filter layer The light shielding portion is provided so as to be electrically conductive and insulated from the electrode portion, and is configured to be grounded when incorporated in the display device.

  The color filter according to the present invention further includes a transparent electrode layer disposed on a side of the color filter layer opposite to the side facing the base material, and the transparent electrode layer is incorporated into the display device. The light-shielding part of the color filter layer is insulated from the transparent electrode layer so as to function as an electrode for controlling the display of each pixel. You may arrange | position between.

  In the color filter according to the present invention, the electrode portion is disposed between the color filter layer and the base material, the first electrode portion is disposed between the first electrode portion and the color filter layer. An insulating layer that insulates the first electrode portion from the second electrode portion is formed between the first electrode portion and the second electrode portion. The first electrode unit includes a plurality of conductors arranged side by side in one direction, each including a plurality of conductors extending in a direction intersecting with the one direction, and the second electrode unit includes: A plurality of conductors arranged side by side in another direction different from the one direction, each extending in a direction intersecting with the other direction, may be included. Alternatively, in the color filter according to the present invention, the electrode portion is between the first electrode portion disposed on the opposite side of the base material from the color filter layer, and between the first electrode portion and the base material. An insulating layer that insulates the first electrode portion from the second electrode portion is formed between the first electrode portion and the second electrode portion. The first electrode unit includes a plurality of conductors arranged side by side in one direction, each including a plurality of conductors extending in a direction intersecting the one direction, and the second electrode unit includes: A plurality of conductors arranged side by side in another direction different from the one direction, each extending in a direction crossing the other direction, may be included. In the color filter according to the present invention, the one direction may be orthogonal to the other direction.

  Furthermore, in the color filter according to the present invention, the light-shielding portion of the color filter layer includes at least a main body portion whose surface is formed of metal, and an antireflection portion disposed on the substrate side of the main body portion, You may make it have.

  Furthermore, a display device according to the present invention includes any one of the color filters described above.

  The display device according to the present invention may further include a substrate disposed to face the color filter, and a liquid crystal layer disposed between the color filter and the substrate.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.

  In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

  Further, the terms “sheet”, “film”, “plate”, and “film” used in the present case are not distinguished from each other only based on the difference in names. Thus, for example, a “sheet” is a concept that includes members and parts that may also be called films, plates, membranes, and the like.

[First Embodiment]
First, the first embodiment will be described. 1 to 6 are diagrams for explaining a first embodiment according to the present invention. 1 is a diagram schematically showing the configuration of the display device, FIG. 2 is a diagram showing the display panel of the display device in a cross section along the normal direction of the display surface, and FIG. 3 is a diagram of III in FIG. FIG. 4 is a sectional view taken along line -III, and FIG. 4 is a top view showing a color filter of the display panel.

  The display device 10 shown in FIGS. 1 to 4 has a capacitively coupled touch panel function, can detect a contact position of an external conductor (for example, a human finger) on the display surface, and displays an image. It is configured as a possible device. That is, the display device 10 functions as an output device that outputs information such as characters and drawings as an image, and also functions as an input device that inputs information by touching (touching) the display surface 12.

  Here, the term “capacitive coupling” method is used in this case as having the same meaning as that used in the technical field of touch panels. The “capacitance coupling” method is also called “capacitance” method, “capacitance coupling” method, etc. in the technical field of the touch panel. It is treated as a term that is synonymous with the method. A typical capacitively coupled touch panel includes a conductor layer. When an external conductor (typically a human finger) comes into contact with the touch panel, the external conductor and the conductor layer of the touch panel are connected. A capacitor (capacitance) is formed between them. Based on the change in the electrical state accompanying the formation of the capacitor, the position coordinates of the position where the external conductor is in contact on the touch panel are specified.

  As shown in FIGS. 1 to 4, the display device 10 according to the present embodiment has a display panel 40 configured as a liquid crystal display panel (LCD panel, liquid crystal panel). That is, in the following embodiments, an example in which the present invention is applied to a liquid crystal display device (liquid crystal display) will be described.

  As shown in FIG. 1, the display device 10 includes a display panel 40, a control unit 20 that is connected to the display panel 40 and controls driving of the display panel 40, and a display panel 40 as a liquid crystal panel on the back side (non-observer). And a surface light source device (backlight) 30 that illuminates from the side. In the present embodiment, the display panel 40 formed as a liquid crystal panel selectively transmits the planar light from the surface light source device 30 so that an image can be displayed on the display surface 12. Yes. Further, the display surface 12 of the display panel 40 functions as an input surface (touch surface, contact surface) of the touch panel. That is, information can be input to the display device 10 from the outside by bringing a conductor such as a human finger into contact with the display surface 12.

  As the surface light source device 30, for example, an edge light type or a direct type surface light source device can be used as appropriate.

  The control unit 20 includes a video information processing unit 22 that processes information regarding a video to be displayed, and an input information processing unit 24 that processes information input via the display surface 12. The video information processing unit 22 is connected to the display panel 40 and drives the display panel 40 based on the video information. That is, the video information processing unit 22 includes a circuit (drive circuit) configured to control display (transmission of light) of each pixel based on video information.

  On the other hand, the input information processing unit 24 is connected to the display panel 40 and processes information input via the display surface 12. Specifically, the input information processing unit 24 can specify the contact position of the conductor on the display surface 12 when the conductor (typically a human finger) is in contact with the display surface 12. A configured circuit (detection circuit) is included. Further, the input information processing unit 24 is connected to the video information processing unit 22 and can transmit the processed input information to the video information processing unit 22. At this time, the video information processing unit 22 can create video information based on the input information and display a video corresponding to the input information on the display surface 12.

  The video information processing unit 22 and the input information processing unit 24 of the control unit 20 are used in the video information processing unit 22 used in the conventional video display device and the conventional touch panel device, including the circuit configuration. The input information processing unit 24 can be configured in the same manner, and detailed description thereof is omitted here. As an example, Patent Document 1 (Japanese Patent Laid-Open No. 2006-23904) described above discloses an example of a circuit included in the input information processing unit 24.

  Next, the display panel 40 will be described in detail. The display panel 40 includes a configuration for enabling the display device 10 to display an image and a configuration for enabling the display device 10 to function as a touch panel. Among these, first, a configuration for functioning mainly as a video display device of the display panel 40 will be described, and then a configuration for functioning mainly as a touch panel of the display panel 40 will be described.

  As shown in FIG. 1, the display panel 40 includes a display area A1 that can display an image, and a non-display area A2 that is disposed outside the display area A1 so as to surround the display area A1. Yes. The display area A1 includes a pixel area A11 and a non-pixel area A12 that is an area outside the pixel area A11 (see FIG. 4). Here, the pixel area A11 is an area where a pixel which is a minimum element composing an image and in which image light can be transmitted is located (occupied).

  In the present embodiment, the pixel area A11 has a plurality of unit pixels (picture elements) UP that constitute one pixel, and each unit pixel UP is composed of three sub-pixels SP. The three subpixels SP selectively transmit different colors. That is, light of different wavelength bands is transmitted from the three subpixels SP. Specifically, the three sub-pixels SP are configured to selectively transmit red light, green light, and blue light, respectively, so that a color image can be displayed on the display surface 12. It has become.

  As shown in FIG. 2, a display panel 40 as a liquid crystal panel includes a first substrate 50 (hereinafter also referred to as a color filter, a color filter substrate, and a counter substrate) and a first substrate facing the first substrate 50. 50 and a liquid crystal layer 45 enclosed between the first substrate 50 and the second substrate 80, and a second substrate (hereinafter also referred to as an element substrate or an array substrate) 80 disposed on the back side (surface light source device side) 50. And have.

  As shown in FIG. 2, the first substrate 50 includes a transparent plate-like first base material 52 and a color filter layer 54. The first substrate 52 is made of, for example, a resin plate material or plate glass. The color filter layer 54 has a light shielding part 55 that has a light shielding property and forms a non-pixel region A12. The light-shielding portion 55 is formed in a pattern that defines through openings that each constitute the sub-pixel SP, specifically, in a generally lattice pattern as shown in FIG. In addition, the color filter layer 54 further includes coloring portions 56 (56R, 56G, and 56B) provided so as to fill the through openings that form the subpixels SP. Each of the colored portions 56R, 56G, and 56B is colored in the display color of the corresponding subpixel SP.

  As shown in FIG. 2, the light-shielding part 55 has a main body part 55a and an antireflection part 55b disposed on the base material side of the main body part 55a so as to be adjacent to the main body part 55a. The main body 55a is made of a material having at least a surface having conductivity, such as a metal such as chromium. The antireflection layer 55b is made of a low reflective material, for example, chromium oxide. As a result, the light shielding portion 55 in the present embodiment is configured as a layer having not only light shielding properties but also conductivity, and is grounded in a state where the color filter 50 is incorporated in the display device 10 as will be described later. Further, the light shielding portion 55 having a lattice pattern extends and extends over the entire display area A1.

  In addition, about the other structure of the light-shielding part 55 and the colored layer 56, it can be made to be the same as that of the structure currently disclosed by various well-known literature (for example, Unexamined-Japanese-Patent No. 2005-331937), and here more than this The detailed description of is omitted.

  Further, the first substrate 50 is appropriately provided with other components in order to effectively function as a substrate (color filter substrate) on the viewer side of the liquid crystal panel. For example, a polarizing plate (not shown) or the like is provided on the opposite side of the first base material 52 from the liquid crystal layer 45. On the other hand, a transparent electrode layer 58 (see FIG. 2), an alignment film (not shown), and the like are provided on the liquid crystal layer 45 side of the color filter layer 54. The transparent electrode layer 58 is configured to function as an electrode for controlling the display state of each pixel.

  Other configurations of the first substrate 50 can be the same as the configurations disclosed in various known documents (for example, Japanese Patent Application Laid-Open No. 2007-248816), and detailed description thereof is omitted here.

  On the other hand, as shown in FIG. 2, the second substrate 80 includes a transparent second base material 82 and pixel electrodes 84 respectively disposed in the pixel region A <b> 11 on the base material 82. In addition, a switching element 86 that controls application to the pixel electrode 84 is provided separately for each pixel electrode 84 (sub-pixel SP). The switching element 86 can be formed as a thin film transistor (TFT) using, for example, low-temperature polysilicon technology. The switching element 86 is electrically connected to the video information processing unit 22 of the control unit 20 described above, and operates based on a signal from a drive circuit for controlling display of each pixel of the video information processing unit 22. Various circuit wirings (not shown) such as scanning lines and signal lines (data lines) necessary for driving the switching element 86 are formed on the second substrate 84. Note that the detailed configuration, manufacturing method, operation method, and the like of the switching element 86 and circuit wiring associated with the switching element 86 are disclosed in various known documents (for example, Japanese Unexamined Patent Application Publication No. 2007-316243 and Japanese Unexamined Patent Application Publication No. 2007-248816). Here, detailed description is omitted.

  Further, the second substrate 80 is appropriately provided with other components in order to effectively function as a substrate (element substrate, array substrate) on the surface light source device side of the liquid crystal panel. For example, on the side of the second substrate 80 facing the liquid crystal layer 45, a protective layer 88 for protecting the element 86 and the like on the second base material 82, an alignment film (not shown), and the like are provided. A polarizing plate (not shown) or the like is provided on the opposite side of the second substrate 80 from the liquid crystal layer 45. Such a configuration is disclosed in various known documents (for example, Japanese Patent Application Laid-Open No. 2007-248816), and detailed description thereof is omitted here.

  The above is the configuration for the display panel 40 to function mainly as a video display device. Next, a configuration for functioning mainly as a touch panel of the display panel 40 will be described.

  As shown in FIG. 2, between the color filter layer 54 and the 1st base material 52, it has the 1st electrode part (1st electrode layer) 60 and 2nd electrode part (2nd electrode layer) which have electroconductivity. ) 70 is formed. A first insulating layer (insulating film) made of a transparent material is formed between the first electrode portion 60 and the second electrode portion 70. The first insulating layer 67 is a film-like layer and extends over the entire display area A1. As a result, the first electrode part 60 and the second electrode part 70 are physically separated from each other and electrically insulated from each other via the first insulating layer 67.

  The first electrode unit 60 and the second electrode unit 70 are made of a conductive material (for example, ITO), and are configured to detect a contact position of the external conductor with respect to the display surface 12. It is electrically connected to 24 detection circuits. As shown in FIG. 2, the first electrode unit 60 is disposed closer to the first base material 52 (observer side) than the second electrode unit 70. In other words, the second electrode unit 70 is disposed on the color filter layer 54 side (the surface light source device 30 side) with respect to the first electrode unit 60.

  As shown in FIG. 3 showing a cross section taken along line III-III in FIG. 2, the first electrode unit 60 is a plurality of lines arranged in one direction along the plate surface of the first substrate 50. It is composed of a conductive conductor 61. The second electrode unit 70 is composed of a plurality of linear conductors 71 arranged in the other direction along the plate surface of the first substrate 50 intersecting the one direction. In the present embodiment, one direction that is the arrangement direction of the linear conductors 61 of the first electrode portion 60 and the other direction that is the arrangement direction of the linear conductors 71 of the second electrode portion 70 are orthogonal to each other. Yes.

  As shown in FIG. 3, the linear conductors 61 included in the first electrode portion 60 extend linearly in a direction intersecting with the arrangement direction (the one direction). Similarly, the linear conductors 71 included in the second electrode portion 70 extend linearly in a direction intersecting with the arrangement direction (the other direction). In particular, in the illustrated example, the linear conductors 61 included in the first electrode portion 60 extend linearly along a direction (the other direction) orthogonal to the arrangement direction (the one direction), and the second The linear conductor 71 included in the electrode unit 70 extends linearly along a direction (the one direction) orthogonal to the arrangement direction (the other direction).

  In particular, in the present embodiment, the linear conductor 61 included in the first electrode portion 60 has a line portion 61a extending linearly and a bulging portion 61b bulging from the line portion 61a. In the illustrated example, the line portion 61 a extends linearly along a direction that intersects the arrangement direction of the linear conductors 61. The bulging portion 61 b is a portion that bulges from the line portion 61 a along the plate surface of the first substrate 50. Therefore, the width of the linear conductor 61 is thicker at the portion where the bulging portion 61b is provided. As shown in FIG. 3, in the present embodiment, the linear conductor 61 has an outer contour that is substantially circular in plan view at the bulging portion 61b.

  The linear conductor 71 included in the second electrode unit 70 is configured similarly to the linear conductor 61 included in the first electrode unit 60. That is, the linear conductor 71 included in the second electrode portion 70 includes a line portion 71a extending linearly and a bulging portion 71b bulging from the line portion 71a. In the illustrated example, the line portion 71 a extends linearly along a direction intersecting with the arrangement direction of the linear conductors 71. The bulging portion 71 b is a portion that bulges from the line portion 71 a along the plate surface of the first substrate 50. Therefore, the width of the linear conductor 71 is thicker at the portion where the bulging portion 71b is provided. As shown in FIG. 3, in the present embodiment, the linear conductor 71 has an outer contour that is substantially circular in plan view at the bulging portion 71b.

  As shown in FIG. 3, when observed from the normal direction of the plate surface of the first substrate 50, each linear conductor 61 included in the first electrode portion 60 is a linear shape included in the second electrode portion 70. It intersects with the conductor 71 at many places (intersections). As shown in FIG. 3, the bulging portion 61 b of the first electrode portion 60 is located between two adjacent intersections with the linear conductor 71 of the second electrode portion 70 on the linear conductor 61. Has been placed. Similarly, when observed from the normal direction of the plate surface of the first substrate 50, each of the linear conductors 71 included in the second electrode unit 70 has a large number of linear conductors 61 included in the first electrode unit 60. Intersects at points (intersections). The bulging portion 71 b of the second electrode portion 70 is also disposed on the linear conductor 71 between two adjacent intersections with the linear conductor 61 of the first electrode portion 60. Furthermore, in the present embodiment, the bulging portion 61b of the linear conductor 61 included in the first electrode portion 60 and the bulging portion 71b of the linear conductor 71 included in the second electrode portion 70 are It arrange | positions so that it may not overlap when it observes from the normal line direction of the plate | board surface of 1 board | substrate 50. FIG.

  Further, as shown in FIG. 3, a positioning mark (alignment mark) 65 and an external lead-out line 63 are formed on the surface of the first base member 52 on which the electrode portions 60 and 70 and the color filter layer 54 are formed. Is formed. As will be described later, the positioning mark 65 is used as a positioning reference when the electrode portions 60, 70, the color filter layer 54, and the like are formed on the first substrate 60. That is, the positions along the plate surface of the first base material 52 such as the electrode portions 60 and 70 and the color filter layer 54 are positioned with reference to the positioning mark 65.

  On the other hand, the external lead-out line 63 is provided at both ends of each of the linear conductors 61 and 71 of the conductive portions 60 and 70. The external lead-out line 63 is made of a conductive material. Then, one end of the corresponding external lead wire 63 is electrically connected to both ends of each of the linear conductors 61 and 71 (see FIG. 3). Each external lead-out line 63 is electrically connected at the other end to a detection circuit of the input information processing unit 24 configured to detect a contact position of the external conductor with respect to the display surface 12. That is, the linear conductors 61 and 71 of the electrode portions 60 and 70 are electrically connected to the detection circuit that detects the contact position via the external lead-out line 63.

  The positioning mark 65 and the external lead-out line 63 are arranged in the non-display area A2 on the first base material 52. That is, the positioning mark 65 and the external lead-out line 63 are located in a region that is not observed by an observer who observes the display device 10. In the present embodiment, the external lead-out line 63 is formed of the same material as that of the positioning mark 65.

  As shown in FIG. 2, a second insulating layer (second insulating film) 77 made of a transparent material is formed between the color filter layer 54 and the second electrode portion 70. The second insulating layer 77 is a film-like layer and extends over the entire display area A1. As a result, the color filter layer 54 (the light shielding portion 55 and the coloring portion 56) and the second electrode portion 70 are physically separated from each other and electrically insulated from each other via the second insulating layer 77. Yes.

  Further, as shown in FIG. 2, a third insulating layer (third insulating film) 79 made of a transparent material is formed between the color filter layer 54 and the transparent electrode layer 58. The third insulating layer 79 is a film-like layer and extends over the entire display area A1. As a result, the color filter layer 54 (the light shielding portion 55 and the coloring portion 56) and the transparent electrode layer 58 are physically separated from each other and electrically insulated from each other via the insulating layer 79.

  By the way, as described above, the first electrode 60 and the second electrode 70 are each connected to the external lead-out line 63. Therefore, the first insulating layer 67 disposed between the first electrode 60 and the second electrode 70 and the second insulating layer 77 disposed between the second electrode 70 and the color filter layer 54 are non- In the display area A2, it is provided so as not to hinder the conduction between the external lead-out line 63 and the first electrode 60 provided on the first base material 52 and the conduction between the external lead-out line 63 and the second electrode 70. . Further, the light shielding portion 55 of the color filter layer 54 is grounded as will be described later. Therefore, as one aspect, the color filter layer 54 and the third insulating layer 79 disposed on the light shielding portion 55 are provided so that the ground portion of the light shielding portion 55 of the color filter layer 54 is exposed in the non-display area A2. It is done. Further, the transparent electrode layer 58 is disposed as an electrode so as to ensure conduction with the outside of the liquid crystal cell. In such an embodiment, at least one of the light shielding portion 55 and the transparent electrode layer 58 of the color filter layer 54 is externally provided on the second substrate 80 facing the first substrate 50 via a conductive paste or the like. It may be connected to a line.

  As another aspect, at least one of the ground portion (contact portion, terminal portion) of the light shielding portion 55 of the color filter layer 54 and the external connection portion (contact portion, terminal portion) of the transparent electrode layer 58 is extended in the substrate outer peripheral direction. In some cases, it may be connected to an external lead line provided on the first substrate 52. In this case, the first insulating layer 67, the second insulating layer 77, and the color filter layer 54 that are disposed closer to the first base member 52 than the transparent electrode layer 58 are connected to the transparent electrode layer 58 and the external lead line. In addition, the first insulating layer 67 and the second insulating layer 77 disposed closer to the first base member 52 than the light shielding portion 55 are provided with the light shielding portion 55 and the external lead wire. It is necessary to be provided so as not to interfere with the connection.

  The pattern of each layer 60, 67, 70, 77, 54, 79, 58 in the non-display area A2 as described above can be designed as appropriate. 5A, 5B, 5C, 5D, and 5E, both the light shielding portion 55 and the transparent electrode layer 58 of the color filter layer 54 are provided on the second substrate 80 via a conductive paste or the like. An example of an aspect connected to an external lead-out line is shown. 5B is a view showing a cross section taken along line BB in FIG. 5A. FIG. 5C is a diagram showing a cross section taken along line CC of FIG. 5A. FIG. 5D is a diagram showing a cross section taken along the line DD of FIG. 5A. FIG. 5E is a diagram showing a cross section taken along line EE of FIG. 5A. 5A is a contact portion (terminal portion) of the transparent electrode layer 58 used for conduction with the outside, and 55c in FIG. 5A is a contact portion of the light shielding portion 55 of the color filter layer 54 used for grounding. (Terminal part).

  Next, an example of a method for manufacturing the first substrate having the above configuration will be described mainly with reference to FIG.

  As shown in FIG. 6, first, as the first step S1, a transparent base material that forms the first base material 52 is prepared. Although a plate glass is typically used as the transparent substrate, the present invention is not limited to this, and a resin plate may be used as a transparent substrate for constituting the first substrate 52.

  Next, as the second step S <b> 2, the positioning mark 65 and the external lead-out line 63 described above are formed on one surface of the first base material 52. At this time, the positioning mark 65 and the external lead-out line 63 can be simultaneously formed from the same material by the same etching process using a photolithography technique. As a material forming the positioning mark 65 and the external lead-out line 63, for example, a material having high conductivity such as copper or aluminum and available at a relatively low cost can be used.

  According to such a method, the positioning mark 65 and the external lead-out line 63 can be efficiently formed on the first base material 52. Further, since the positioning mark 65 and the external lead line 63 are formed by the same etching process using a photolithography technique, the external lead line 63 is accurately formed at a fixed position with respect to the positioning mark 65. It becomes like this. In other words, the external lead-out line 63 is positioned very easily and accurately with respect to the positioning mark 65 on the plane along the plate surface of the first substrate 50.

  Thereafter, as the third step S3, the above-described first electrode portion 60 is formed on the side of the first base material 52 on which the positioning mark 65 is formed. The first electrode unit 60 can be formed by sputtering, vapor deposition, etching using a photolithography technique, or the like. As a material forming each linear conductor 61 of the first electrode part 60, for example, a conductive material such as ITO (indium tin oxide) can be used. When forming the first electrode portion 60, each linear conductor 61 of the first electrode portion 60 can be formed by positioning with reference to the positioning mark 65 already formed on the first base member 52. it can. According to such a method, the first electrode unit 60 can be positioned very easily and accurately with respect to the positioning mark 65 in a plane along the plate surface of the first substrate 50. Thereby, both ends of each linear conductor 61 of the first electrode portion 60 can be reliably brought into contact with the external lead wire 63 already formed on the first base material 52.

  Next, as the fourth step S <b> 4, the first insulating layer 67 described above is formed so as to cover the first electrode unit 60. Specifically, the first insulating layer 67 may be formed by laminating a commercially available transparent insulating film on the first base material 50 so as to cover the first electrode portion 60, or The first insulating layer 67 may be formed by coating the first base material 50 with a coating liquid that forms the first insulating layer 67 so as to cover the first electrode portion 60. Further, the first insulating layer 67 is appropriately patterned as shown in FIGS. 5A to 5E, for example, by etching using a photolithography technique or the like. In addition, as a material which makes the 1st insulating layer 67, various transparent insulating materials, such as UV curable acrylic resin, can be used, for example.

  Thereafter, as the fifth step S5, the above-described second electrode portion 70 is formed. The second electrode unit 70 can be formed on the first insulating film 67 in the same manner as the first electrode unit 60 described above. That is, when forming the second electrode portion 70, each linear conductor 71 of the second electrode portion 70 can be formed by positioning with reference to the positioning marks 65 already formed on the first base material 52. it can. According to such a method, the second electrode portion 70 can be positioned very easily and accurately with respect to the positioning mark 65 in a plane along the plate surface of the first substrate 50. Thereby, both ends of each linear conductor 71 of the second electrode part 70 can be brought into contact with the external lead-out line 63 already formed on the first base material 52 with certainty. In addition, about the formation method of the 2nd electrode part 70, the other description which overlaps with the formation method of the 1st electrode part 60 is abbreviate | omitted.

  Next, as the sixth step S6, the above-described second insulating layer 77 is formed. The second insulating layer 77 can be formed so as to cover the second electrode portion 70 in the same manner as the first insulating layer 67 described above. Therefore, the overlapping description is omitted here.

  Next, as a seventh step S <b> 7, the color filter layer 54 is formed on the second insulating layer 77. As a specific example, first, a lattice-shaped (matrix-shaped) light shielding portion 55 can be formed on the second insulating layer 77 by etching using a photolithography technique. When forming the light shielding part 55, the light shielding part 55 can be formed by positioning with reference to the positioning marks 65 already formed on the first base material 52. According to such a method, the light shielding portion 55 can be positioned very easily and accurately with respect to the positioning mark 65 in a plane along the plate surface of the first substrate 50.

  In addition, the light-shielding part 55 (refer FIG. 2) including the main-body part 55a and the reflection preventing part 55b can be formed as follows, for example. First, a film (for example, a film made of chromium oxide) that forms the antireflection portion 55 b is formed on the second insulating layer 77. Thereafter, a film (for example, a film made of chromium) that forms the main body portion 55a is formed on the film that forms the antireflection portion 55b on the film that forms the antireflection portion 55b. . After that, the film that forms the antireflection portion 55b and the film that forms the main body portion 55a are patterned into a lattice shape by etching using a photolithography technique to obtain the light shielding portion 55 shown in FIG. be able to. Note that the conductive portion (main body portion) 55a of the light shielding portion 55 is grounded through a terminal formed on the base member 52, for example.

  Next, the colored portions 56R, 56G, and 56B can be formed by patterning using a photolithography technique or by inkjet printing. When forming the colored portions 56R, 56G, and 56B, the colored portions 56R, 56G, and 56B can be formed by positioning using the positioning marks 65 already formed on the first base member 52 as a reference. According to such a method, the colored portions 56R, 56G, and 56B can be positioned very easily and accurately with respect to the positioning mark 65 on the plane along the plate surface of the first substrate 50. That is, the colored portions 56R, 56G, and 56B can be positioned very easily and accurately with respect to the light shielding portion 55 that is positioned with the positioning mark 65 as a reference.

  Furthermore, the color filter layer 54 formed in this way is also accurately positioned with respect to the first electrode portion 60 and the second electrode portion 70 that are positioned with reference to the positioning mark 65. In other words, each linear conductor 61 of the first electrode portion 60 and each linear conductor 71 of the second electrode portion 70 are positioned extremely accurately with respect to the pixel array defined by the color filter layer 54. For this reason, as will be described later, the position coordinates of the contact position of the external conductor with respect to the display surface 12 can be specified extremely accurately in correspondence with the pixel arrangement. That is, the display device substrate 50 having an excellent resolution touch panel function can be provided at a low cost by an extremely easy manufacturing method.

  Next, as the eighth step S <b> 8, the above-described third insulating layer 79 is formed on the color filter layer 54. The third insulating layer 79 can be formed on the color filter layer 54 in the same manner as the first insulating layer 67 and the second insulating layer 77 described above. Therefore, the overlapping description is omitted here.

  Thereafter, as the ninth step S <b> 9, the above-described transparent electrode layer 58 is formed on the third insulating layer 79. As an example, the transparent electrode layer 58 can be formed by depositing a material that forms the transparent electrode layer 58 on the third insulating layer 79 by sputtering. In addition, as a material which makes the transparent electrode layer 58, the material which has various translucency and electroconductivity, such as ITO (indium tin oxide), can be used, for example.

  Finally, a first substrate 50 is manufactured by forming a polarizing plate, an alignment film, and the like that are not shown in FIG.

  According to the manufacturing method as described above, the external lead-out line 63, the first electrode part 60, the second electrode part 70, and the color filter layer are based on the positioning mark 65 formed first on the first base material 52. The light shielding portion 55 and the coloring portion 56 of the color filter layer 54 are positioned. Therefore, the external lead-out line 63 and the linear conductor 61 of the first electrode unit 60 can be reliably electrically connected. Similarly, the external lead wire 63 and the linear conductor 71 of the second electrode portion 70 can be reliably electrically connected. In addition, the colored portions 56R, 56G, and 56B of the respective colors can be reliably formed in the through openings of the light shielding portion 54 of the color filter layer 54. Thereby, the color filter layer 54 free from color mixing or color loss can be obtained. Further, since the linear conductors 61 and 71 and the color filter layer 54 are positioned with reference to the same positioning mark 65, the position coordinates of the linear conductors 61 and 71 with respect to the pixel array can be accurately specified. Will be able to. As a result, the display device 10 having a touch panel function that can accurately detect the contact position of the external conductor to the display surface 12 can be easily and inexpensively manufactured.

  Next, an effect | action at the time of using the above display apparatuses 10 is demonstrated. As described above, the display device 10 according to the present embodiment is configured to function as a device for displaying video and also as a touch panel. Among these, first, the operation of the display device 10 when functioning as a device for displaying video will be described, and then the operation of the display device 10 when functioning as a touch panel will be described.

  When the display device 10 is used as a device for displaying an image, the switching element 86 provided on the element substrate 80 is operated by the control from the image information processing unit 22 of the control unit 20. Thereby, transmission of light from each pixel is controlled, and a desired image is displayed on the display surface 12.

  As described above, the display device 10 also functions as a capacitively coupled touch panel. In the present embodiment, the electrode units 60 and 70 included in the capacitively coupled touch panel are not supported by an independent support base material, but are supported by the color filter substrate 50 of the display device 10. Therefore, compared to pasting a touch panel separate from the display device to the display surface of the display device, an interface that can reflect ambient light (external light) such as illumination or image light (interface with the atmosphere) The number of can be reduced. Thereby, the transmittance | permeability of image light rises and energy efficiency improves, and the contrast of the image | video displayed on the display apparatus 10 can be improved by suppressing reflection of environmental light. From the above, according to the display device 10 according to the present embodiment, it is possible to display an image with excellent image quality although a touch panel function is provided.

  Next, the operation when used as a touch panel will be described.

  When an external conductor (for example, a human finger) contacts the display surface 12, the linear conductors 61, 70 of the electrode portions 60, 70 located in the vicinity of the contact position of the external conductor with the display surface 12 by the external conductor, 71 function as an electrode, and an electric field is formed. At this time, the first base member 52 and the like positioned between the outer conductor and the linear conductors 61 and 71 function as a dielectric. That is, when the outer conductor comes into contact with the display surface 12, a capacitor having the outer conductor and the electrode portions 60 and 70 as electrodes is formed.

  The detection circuit of the input information processing unit 24 of the control unit 20 is connected to the linear conductors 61 and 71 so that the capacitance between the linear conductors 61 and 71 and the external conductor can be detected. It has become. Then, the input information processing unit 24 detects a change in capacitance between each of the linear conductors 61 and 71 and the outer conductor, so that the outer conductor becomes any of the linear conductors 61 of the first electrode unit 60. As well as which linear conductor 71 of the second electrode portion 70 the outer conductor faces.

  That is, the detection circuit of the input information processing unit 24 specifies a linear conductor facing the external conductor from the linear conductors 61 of the first electrode unit 60 arranged side by side in the one direction. The position of the outer conductor on the coordinate axis extending in the one direction is specified. Similarly, the detection circuit of the input information processing unit 24 specifies the linear conductor facing the external conductor from the linear conductors 71 of the second electrode unit 70 arranged in the other direction. Thus, the position of the outer conductor on the coordinate axis extending in the other direction is specified. In this way, the position coordinates of the contact position of the external conductor on the display surface 12 can be accurately identified on the display surface 12 by detecting the contact position of the external conductor on the display surface 12 in two directions. Can do.

  Further details of the method for detecting the contact position on the capacitively coupled touch panel are disclosed in, for example, the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 2006-23904), and further description thereof is omitted here. To do.

  As shown in FIG. 2, the first electrode portion 60 and the second electrode portion 70 are arranged at different positions along the normal direction to the plate surface of the substrate 50. Specifically, the second electrode unit 70 is disposed at a position farther from the display surface 12 than the first electrode unit 60. In other words, the second electrode unit 70 is disposed at a position farther from the display surface 12 than the first electrode unit 60. For this reason, depending on the position on the display surface 12 with which the outer conductor contacts, the linear conductor 61 of the first electrode portion 60 is interposed between the outer conductor and the linear conductor 71 of the second electrode portion 70. Will come to do. In this case, the capacitor may not be effectively formed between the outer conductor and the second electrode portion 70.

  On the other hand, according to the present embodiment, as shown in FIG. 3, the linear conductor 61 of the first electrode portion 60 has the line portion 61 a and the bulging portion 61 b, and the linear shape of the second electrode portion 70. The conductor 71 has a line portion 71a and a bulging portion 71b. In each of the linear conductors 61 and 71, the width of the bulging portions 61b and 71b is very thick compared to the width of the line portions 61a and 71a. As described above, the bulging portion 61b of the linear conductor 61 included in the first electrode portion 60 and the bulging portion 71b of the linear conductor 71 included in the second electrode portion 70 are the first It arrange | positions so that it may not overlap, when it observes from the normal line direction of the board surface of the board | substrate 50. FIG.

  Therefore, when the outer conductor comes into contact with the display surface 12, a capacitor can be stably formed between the outer conductor and the linear conductor 71 of the second electrode portion 70. As a result, the contact position (touch position) of the outer conductor with the contact surface 12 can be detected with high sensitivity and accuracy in a direction parallel to the arrangement direction of the linear conductors 71 of the second electrode unit 70. Become.

  By the way, when the display device 10 displays an image, a voltage is applied between the pixel electrode 84 and the transparent electrode layer 58 by driving the switching element 86 in order to control display in each pixel. And when this inventor repeated earnest research, electrical noise may be added to the detection circuit for detecting the contact of the external conductor to the display surface 12 resulting from the application of this voltage. It was discovered.

  On the other hand, according to the present embodiment, the color filter layer 54 is provided between the transparent electrode layer 58 and the electrode portions 60 and 70. The color filter layer 54 includes a light-shielding portion 55 having a fine lattice pattern extending and extending through the display area A1. The light shielding portion 55 has conductivity and is grounded. In particular, in the present embodiment, the light shielding portion 55 includes a main body portion 55a made of, for example, a metal such as chromium, and thus has excellent conductivity. Therefore, the grounded light-shielding portion 55 can prevent electrical interference between the drive circuit for functioning as a video display device and the detection circuit for functioning as a touch panel. That is, the light shielding part 55 functions as a shield layer for preventing electrical interference. Thereby, the contact of the external conductor to the display surface 12 can be accurately detected with high sensitivity.

  In particular, in the present embodiment, the light shielding portion 55 of the color filter layer 54 functions as a layer for preventing electrical interference between the video display driving circuit and the touch panel detection circuit. That is, it is not necessary to separately provide a layer for preventing electrical interference in the display device 10 (color filter 50). In other words, it is not necessary to increase the number of layers of the display device 10 (color filter 50). Accordingly, it is possible to improve the sensitivity of the touch panel function without increasing the interface that can reflect ambient light (external light) such as illumination and image light and degrading the image quality.

  In addition, since the main body 55a of the light shielding unit 55 is made of metal, there is a possibility that ambient light (external light) such as illumination is reflected and the contrast of the image displayed on the display device 10 is lowered. However, the light-shielding portion 55 in the present embodiment further includes an antireflection portion 55b disposed on the first base material 52 side of the main body portion 55a so as to be adjacent to the main body portion 55a. That is, the main body part 55a is covered from the observer side by the antireflection part 55b, whereby ambient light (external light) such as illumination is reflected by the main body part 55a which can have a high reflectance. Can be prevented. By providing the antireflection portion 55b as described above, the contrast can be improved by suppressing the reflection by the antireflection portion 55b, without reducing the contrast due to the reflection at the main body portion 55a.

  Further, as described above, the video information processing unit 22 and the input information processing unit 24 of the control unit 20 are connected. The input information processing unit 24 can transmit information input when the conductor contacts a predetermined position on the display surface 12 to the video information processing unit 22. Based on the input information read by the input information processing unit 24, the video information processing unit 22 can display a video corresponding to the input information on the display device 10. That is, information is exchanged in an interactive manner between the user (operator) of the display device 10 and the display device 10 by the display function as the output means and the touch panel function as the input means (for example, the user's An instruction to the display device 10 and execution of the instruction by the display device 10) can be realized.

  In particular, as described above, when the linear conductors 61 and 71 and the color filter layer 54 are positioned with reference to the same positioning mark 65, the linear conductors 61 and 71 and the color filter phase 54 are arranged. The pixel arrays defined by can be accurately positioned relative to each other. In this case, the contact position of the external conductor on the display surface 12 can be detected with high accuracy corresponding to the pixel arrangement. As a result, the input corresponding to the video information displayed on the display surface 12 can be detected with high resolution and high accuracy, and thereby, between the user (operator) of the display device 10 and the display device 10. The exchange of information in the form of dialogues will proceed very smoothly.

  According to the first embodiment as described above, the substrate 50 for a display device includes a plate-like base material 52, a color filter layer 54 having a plurality of colored portions 56, a color filter layer 54, and a base material. 52, and electrode parts 60 and 70 configured to be electrically connected to a circuit for detecting contact when incorporated in the display device 10. That is, the electrode portions 60 and 70 for the capacitive coupling touch panel are formed on the substrate 50 for the display device, and the touch panel function is given to the display panel 12 of the display device 10. Thereby, compared with bonding a separate touch panel to the display surface of a display apparatus, manufacturing cost can be reduced significantly. In addition, the number of interfaces (interfaces with the atmosphere) that can reflect ambient light (external light) such as illumination, image light, etc. is reduced compared to pasting a separate touch panel to the display surface of the display device. be able to. Thereby, the transmittance | permeability of image light rises and energy efficiency improves, and the contrast of the image | video displayed on the display apparatus 10 can be improved by suppressing reflection of environmental light. Furthermore, the total thickness of the display panel portion of the display device can be greatly reduced as compared to bonding a separate touch panel to the display surface of the display device.

  Further, since the electrode portions 60 and 70 and the color filter layer 54 are disposed on the same side of the plate-like base material 52, the electrode portions 60 and 70 and the color filter layer 54 are sequentially formed on the base material 52. Accordingly, the display device substrate 10 in which the electrode portions 60 and 70 for the capacitively coupled touch panel are incorporated can be easily and inexpensively manufactured.

  Further, as a touch panel function, a capacitive coupling system is adopted instead of the most widely used resistive film system. In the resistance film system, it is necessary to dispose two conductive films apart via an air layer. On the other hand, in the capacitive coupling method, since it is not necessary to separate the two conductive films by the air layer, reflection at the interface between the air layer and the conductive film, particularly total reflection caused by a difference in refractive index, Problems such as the occurrence of Newton rings due to the interposition of layers can be avoided.

  Further, according to the present embodiment, the first electrode portion 60 and the second electrode portion 70 including the linear conductors 61 and 71 extending in different directions along the display surface 12 are provided. The contact position of the outer conductor (typically, a human finger) with respect to the display surface 12 is the position in the arrangement direction of the linear conductors 61 included in the first electrode unit 60 and the second electrode unit 70. It is configured to be identified by being decomposed into a position in the arrangement direction of the included linear conductors 71. According to such a method, the position coordinates of the contact position of the external conductor on the display surface 12 can be detected with extremely high accuracy.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a diagram corresponding to FIG. 2 and schematically showing the configuration of the display device according to the second embodiment of the present invention.

  In the display device 10 according to the second embodiment, the first and second embodiments described above are provided in that the electrode portions 60 and 70 of the color filter 50 are provided on the side opposite to the color filter layer 54 of the first base material 52. Unlike the first embodiment, the other configurations of the second embodiment can be substantially the same as those of the first embodiment described above. 7 and 8, the same reference numerals are given to portions that can be made the same as those in the first embodiment described above, and a detailed description thereof is omitted.

  The display device 10 shown in FIG. 7 has a capacitive coupling type touch panel function, as with the display devices shown in FIGS. 1 to 6, and has an external conductor (for example, a human finger) to the display surface. It is configured as a device capable of detecting the contact position and displaying an image. The display device 10 includes the display panel 40 and the surface light source device 30 as in the first embodiment. Among these, the surface light source device 30 can be configured similarly to the surface light source device described in the first embodiment.

  The display panel 40 includes a color filter 50 (first substrate, color filter substrate, counter substrate), a second substrate (element substrate, array substrate) 80, and a liquid crystal layer 45. Among these, the second substrate 80 and the liquid crystal layer 45 can have the same configuration as that described in the first embodiment.

  As described above, in the color filter 50 according to the second embodiment, the color filter layer 54 is provided on one side (the liquid crystal layer 45 side) of the first base material 52. In addition, a first electrode part (first electrode layer) 60 and a second electrode part (second electrode layer) 70 having conductivity are formed on the other side of the first base material 52. That is, the first electrode unit 60, the second electrode unit 70, and the color filter layer 54 are arranged with the first base material 52 interposed therebetween, and one side of the first base material 52 (the side of the surface light source device 30, A color filter layer 54 is formed on the upper side in FIG. 7, and electrode portions 60 and 70 are formed on the other side (the observer side, the lower side in FIG. 7) of the first base material 52. Further, as shown in FIG. 7, a polarizing plate 59 is provided on the side of the electrode portions 60 and 70 opposite to the first base material 52.

  In the second embodiment, as shown in FIG. 7, a color filter layer 54 is formed on the surface of one side of the first base material 52. The configurations of the color filter layer 54 and the layers disposed on the liquid crystal layer 45 side of the color filter layer 54 can be configured in the same manner as the corresponding layers in the first embodiment.

  On the other hand, an optically isotropic film 68 is provided between the first electrode portion 60 and the second electrode portion 70. As used herein, “optical isotropy” means a property that does not have optical anisotropy, in other words, a property that does not have birefringence. The optical isotropic film 68 may be composed of various known films known as optical isotropic properties, such as a TAC (triacetylcellulose) film or a COP film (cyclic olefin polymer). The optically isotropic film 68 is an insulating film and extends over the entire display area A1. As a result, the first electrode unit 60 and the second electrode unit 70 are physically separated from each other and electrically insulated from each other via the optical isotropic film 68.

  The 1st electrode part 60 and the 2nd electrode part 70 are comprised similarly to 1st Embodiment mentioned above. That is, the first electrode unit 60 includes a plurality of linear conductors 61 arranged in one direction along the plate surface of the first substrate 50. The second electrode unit 70 includes a plurality of linear conductors 71 arranged in the other direction along the plate surface of the first substrate 50 intersecting the one direction. The first electrode unit 60 and the second electrode unit 70 are electrically connected to a detection circuit of the input information processing unit 24 configured to detect a contact position of the external conductor to the display surface 12. As shown in FIG. 7, the second electrode unit 70 is disposed closer to the first base material 52 than the first electrode unit 60. In other words, the second electrode unit 70 is disposed on the color filter layer 54 side (the surface light source device 30 side) with respect to the first electrode unit 60.

  As will be described later, in the process of manufacturing the color filter 50, the first electrode portion 60 and the second electrode portion 70 can form the electrode-attached film 90 together with the optically isotropic film 68. That is, the electrode-attached film 90 is an optically isotropic film 68, a first electrode part 60 supported on one surface 68a of the optically isotropic film 68 and having a predetermined pattern, and an optically isotropic film. 68 and a second electrode portion 70 which is supported on the other surface of the 68 and has a predetermined pattern. And this 1st electrode part 60 and the 2nd electrode part 70 are made into the 1st base material by joining this film 90 with an electrode with the 1st base material 52 via the contact bonding layer 69 which consists of an insulating adhesive agent. 52 is supported on the other side. As a result, the electrode portions 60 and 70 and the light shielding portion 55 of the color filter layer 54 are physically separated from each other and electrically insulated from each other via the photoadhesive layer 69.

  As such an adhesive layer 69, layers made of materials having various adhesive properties can be used. In the present specification, “adhesive layer” is used as a concept including an adhesive layer made of an adhesive.

  Next, a method for manufacturing the color filter (first substrate) 50 having the above configuration will be described. Here, as an example of the manufacturing method of the first substrate, a laminate having the first base material 52 and the color filter layer 54 supported by the first base material 52, an optical isotropic film 68, and an optical isotropic film. A method of manufacturing the color filter 50 will be described by bonding the film with electrode 90 having the first electrode portion 60 and the second electrode portion 70 formed on 68 using the adhesive layer 69.

  Initially, the process of preparing the laminated body which has the color filter layer 54 supported by the 1st base material 52 and the 1st base material 52 is demonstrated. The laminate having the first substrate 52 and the color filter layer 54 is formed by forming the color filter layer 54 and the like on the first substrate 52 using the method described in the first embodiment. Can be obtained.

  Specifically, first, a transparent base material that forms the first base material 52, such as glass, is prepared. Next, the color filter layer 54 is formed on the first substrate 52 by a method similar to the method described in the first embodiment. Thereafter, the insulating layer 79 is formed on the color filter layer 54 by the same method as that described in the first embodiment. Next, the transparent electrode layer 58 is formed on the insulating layer 79 by a method similar to the method described in the first embodiment.

  Further, by forming an alignment film or the like not shown in FIG. 2 on the transparent electrode layer 58, the first base material 52 and the color filter formed on one side of the first base material 52 are finally obtained. A laminate having the layer 54 and the like is obtained. Note that the conductive portion (main body portion) 55a of the light shielding portion 55 is grounded through a terminal formed on the base member 52, for example.

  Next, the process of preparing the electrode-attached film 90 will be described mainly with reference to FIG.

  First, as shown in FIG. 8A, the optical isotropic film 68, the first conductive film 62 and the second conductive film 72 laminated on the optical isotropic film 68, and the first conductive A laminated body 92 having a first photosensitive film 94a and a second tourism film 94b laminated on the conductive film 62 and the second conductive film 72 is prepared.

  Specifically, first, a transparent and insulating film that forms the optical isotropic film 68 is prepared. Next, the first conductive film 62 is formed on one surface 68 a of the optical isotropic film 68, and the second conductive film 72 is formed on the other surface 68 b of the optical isotropic film 68. As an example, the first conductive film 62 and the second conductive film 72 are formed by depositing the material that forms the first electrode unit 60 and the second electrode unit 70 on the optical isotropic film 68 by sputtering. Can be formed. Thereafter, a photosensitive material is coated on the first conductive film 62 to form the first photosensitive film 94a, and a photosensitive material is coated on the second conductive film 72 to form the second photosensitive film 94b. Form. In this way, a laminate 92 is obtained.

  Next, a first mask 96a having a predetermined pattern corresponding to the pattern of the first electrode portion 60 to be formed is disposed on the first photosensitive film 94a of the multilayer body 92, and the second electrode to be formed. A second mask 96 b having a predetermined pattern corresponding to the pattern of the portion 70 is disposed on the second photosensitive film 94 b of the stacked body 92. As shown in FIG. 8B, in this state, the laminate 92 is irradiated with exposure light corresponding to the photosensitive characteristics of the first photosensitive film 94a and the second photosensitive film 94b from both sides. The pattern exposure of the 94a and the second photosensitive film 94b is simultaneously performed. Thereafter, the first mask 96a and the second mask 96b are removed, and the first photosensitive film 94a and the second photosensitive film 94b are developed. In this manner, as shown in FIG. 8C, the first photosensitive film 94a and the second photosensitive film 94b are patterned.

  Thereafter, as shown in FIG. 8D, the stacked body 92 in which the first photosensitive film 94a and the second photosensitive film 94b are patterned is etched. As a result, the first conductive film 62 is patterned to form the first electrode portion 60, and the second conductive film 72 is patterned to form the second electrode portion 70. Finally, the film with electrode 90 is obtained by removing the first photosensitive film 94a and the second photosensitive film 94b from the laminate 92 (see FIG. 8E).

  According to such a method, the first photosensitive film 94a and the second photosensitive film 94b are exposed simultaneously. In the double-sided simultaneous exposure process, by providing alignment marks on each of the first mask 96a and the second mask 96b, the first mask 96a and the second mask 96b are extremely accurate with respect to each other, for example, on the order of microns. Good and very easy positioning (and therefore in a short time) is possible. As a result, in the electrode-equipped film 90, both the first electrode portion 60 and the second electrode portion 70 are positioned on the optical isotropic film 68 with high accuracy and efficiency.

  On the other hand, when the first photosensitive film 94a and the second photosensitive film 94b are sequentially exposed one by one, the first electrode part 60 and the second electrode part 70 can be manufactured accurately and easily. Can not. If it is going to produce both the 1st electrode part 60 and the 2nd electrode part 70 with sufficient precision, one of the 1st electrode part 60 and the 2nd electrode part 70 will be formed on the film 68 with an alignment mark, and this film 68 after that. The mask used for forming the other of the first electrode part 60 and the second electrode part 70 is positioned with respect to the alignment mark formed above. That is, not only the exposure but also the steps such as development and etching need to be performed separately for each of the first electrode unit 60 and the second electrode unit 70. For this reason, the 1st electrode part 60 and the 2nd electrode part 70 cannot be formed easily efficiently in a short time.

  Further, without using the alignment mark, for example, the first electrode unit 60 and the second electrode unit 70 are exposed while positioning the first mask 96a and the second mask 96b with reference to the end of the base material (film 68). Is also possible. According to this method, the first electrode portion 60 and the second electrode are compared with the above-described method in which each step such as development and etching is separately performed on each of the first electrode portion 60 and the second electrode portion 70. The part 70 can be formed efficiently. However, the positioning accuracy of the first electrode unit 60 and the second electrode unit 70 depends on the external accuracy of the base material (film 68). In general, according to this method, the positioning accuracy of the first electrode portion 60 and the second electrode portion 70 can be expected only in units of several tens of microns.

  From the above, according to the method of the present embodiment, the first electrode portion 60 and the second electrode portion 70 can be easily and accurately positioned with respect to each other. That is, in the electrode-attached film 90, both the first electrode portion 60 and the second electrode portion 70 can be positioned on the optical isotropic film 68 with extremely high accuracy.

  Finally, the laminate having the first base material 52 and the color filter layer 54 obtained as described above and the electrode-attached film 90 are joined via the adhesive layer 69, whereby the color filter 50 is obtained. Is obtained.

  The display device 10 according to the second embodiment configured as described above can achieve the same effects as the display device of the first embodiment described above.

  For example, since the light shielding portion 55 of the color filter layer 54 is electrically conductive and grounded, a drive circuit that functions as a video display device and a detection circuit that functions as a touch panel interfere electrically. Can be prevented. That is, the light shielding part 55 functions as a shield layer for preventing electrical interference. Thereby, the contact of the external conductor to the display surface 12 can be accurately detected with high sensitivity.

  In particular, the light shielding portion 55 of the color filter layer 54 functions as a layer for preventing electrical interference between the video display driving circuit and the touch panel detection circuit. That is, it is not necessary to separately provide a layer for preventing electrical interference in the display device 10 (color filter 50). In other words, it is not necessary to increase the number of layers of the display device 10 (color filter 50). Accordingly, it is possible to improve the sensitivity of the touch panel function without increasing the interface that can reflect ambient light (external light) such as illumination and image light and degrading the image quality.

  Further, the light shielding portion 55 includes a main body portion 55a made of metal and an antireflection portion 55b disposed on the first base material 52 side of the main body portion 55a so as to be adjacent to the main body portion 55a. Since the main body 55a made of metal has excellent conductivity, the sensitivity of the touch panel function can be effectively improved. Further, the antireflection portion 55b covers the main body portion 55a from the observer side, thereby preventing ambient light (external light) such as illumination from being reflected by the main body portion 55a which may have a high reflectance. it can.

  In addition, as mentioned above, the color filter 50 was produced by affixing the film 90 with an electrode which has the 1st electrode part 60 and the 2nd electrode part 70 with respect to the base material 52 in which the color filter layer 54 was formed. In this case, the electrode-attached film 90 is disposed between the pair of polarizing plates included in the display device 10. In the present embodiment, the main body (support) of the electrode-attached film 90 that supports the first electrode portion 60 and the second electrode portion 70 is constituted by an optically isotropic film 68. Therefore, the film 68 that functions as the main body (support) of the electrode-attached film 90 does not disturb the polarization state of the transmitted light. As a result, the light in a specific polarization state that has passed through the light incident side polarizing plate can further pass through the light exiting side polarizing plate 59 after being transmitted through the electrode-attached film 90, and transmitted through the display panel 40. There is no reduction in rate.

[Modification]
Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described.

  For example, in the above-described embodiment, the example in which the insulating layer 79 is provided between the color filter layer 54 and the transparent electrode layer 58 has been described, but the present invention is not limited thereto. The light shielding portion 55 of the color filter layer 54, more precisely, the portion of the light shielding portion 55 that has conductivity and is grounded (in this embodiment, the main body portion 55a of the light shielding portion 55) is a transparent electrode layer. In the case of being insulated from 58, the insulating layer 79 may be omitted. As a specific example, as shown in FIG. 9, the non-conductive (insulating) colored portion 56 covers the light shielding portion 55 from the liquid crystal layer 45 side as well as the inside of the through opening defined by the light shielding portion 55. In this case, the insulating layer 79 can be omitted. In the example shown in FIG. 9, the transparent electrode layer 58 and the light shielding portion 55 of the color filter layer 54 are physically separated from each other and electrically insulated from each other via the coloring portion 56 of the color filter layer 54. The

  In addition, in the modification shown in FIG. 9, about the structure of another part, it can comprise similarly to embodiment mentioned above. In FIG. 9, parts that can be configured in the same way as the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted. FIG. 9 shows an example in which a modification of the coloring unit 56 is applied to the first embodiment described above. Of course, the same applies to the second embodiment described above. Variations can be applied.

  In the above-described embodiment, the light-shielding portion 55 of the color filter 54 includes the main body portion 55a made of conductive metal, and the reflection disposed on the observer side of the main body portion 55a adjacent to the main body portion 55a. Although the example which has the prevention part 55b was shown, it is not restricted to this, The reflection prevention part 55b mentioned above can be abbreviate | omitted. For example, the light shielding portion 55 can be formed using a resin having conductivity and antireflection properties, and the antireflection portion 55b can be omitted.

  Furthermore, although the example which forms the 1st electrode part 60 and the 2nd electrode part 70 from ITO was shown in embodiment mentioned above, it is not restricted to this. For example, the electrode parts 60 and 70 may be made of the same material as the external lead-out line 63. As an example, the electrode portions 60 and 70 may be formed in a stripe shape using the same metal (copper, aluminum, or the like) as the external lead-out line 63. When the electrode portions 60 and 70 are not formed as a film (sheet) extending in the display area A1, the electrode portions 60 and 70 are made of a material that does not have translucency (for example, a metal such as copper or aluminum). The electrode portions 60 and 70 can be designed so that the image light transmitted through the electrode portions 60 and 70 can be observed to a desired degree. That is, the electrode portions 60 and 70 are not limited to a planar (sheet-like) transparent conductor, but may be a metal layer patterned in a lattice shape (mesh shape) or a metal layer patterned in a stripe shape (stripe shape). Can also be configured.

  Furthermore, in the above-described embodiment, the example in which the electrode parts 60 and 70 are manufactured in a separate process from the external lead-out line 63 is shown, but the present invention is not limited to this. For example, when the electrode part 60 is made of the same material as the external lead-out line 63, the electrode part 60 may be formed at the same time when the external lead-out line 63 is formed. For example, the striped pattern (stripe pattern) electrode portion may be made of metal integrally with the external extraction line 63 by etching using a photolithography technique.

  Furthermore, in the above-described embodiment, the linear conductor 61 of the first electrode portion 60 has the line portion 61a and the bulging portion 61b, and the linear conductor 71 of the second electrode portion 70 has the line portion 71a. The example which has the bulging part 71b was shown. Further, in the above-described embodiment, the example in which the bulging portions 61b and 71b are formed in a substantially circular shape in plan view is shown. However, the present invention is not limited thereto, and as an example, the bulging portions 61b and 71b may have a square shape such as a square or a rhombus in plan view. Moreover, the linear conductors 61 and 71 may not have the bulging portions 61b and 71b but may have a linear outline.

  Further, in the above-described embodiment, the example in which the linear conductor 61 of the first electrode unit 60 and the linear conductor 71 of the second electrode unit 70 are configured in the same manner has been described. I can't. For example, as illustrated in FIG. 10, the line width w <b> 2 of the conductor 71 of the second electrode unit 70 is closer to the display surface 12 (observer side surface) of the display device 10. The conductor 61 may be thicker than the line width w1. According to such an example, when the external conductor comes into contact with the display surface 12, the linear shape of the second electrode unit 70 disposed at a position relatively far from the display surface 12 (observer side surface) of the display device 10. A capacitor can be formed stably between the conductor 71 and the external conductor. In addition, the outer conductor and the second electrode portion in contact with the display surface 12 are compared with the capacitance of the capacitor formed between the outer conductor in contact with the display surface 12 and the conductor 61 of the first electrode portion 60. It is possible to prevent the capacitance of the capacitor formed between the 70 conductors 71 from becoming low. As a result, the contact position (touch position) of the outer conductor with respect to the contact surface 12 is not limited to the direction parallel to the arrangement direction of the linear conductors 61 of the first electrode unit 60 but also the linear conductivity of the second electrode unit 70. Even in a direction parallel to the arrangement direction of the bodies 71, it becomes possible to detect with extremely high sensitivity and accuracy.

  In addition, in the modification shown in FIG. 10, about the structure of another part, it can comprise similarly to embodiment mentioned above. In FIG. 10, parts that can be configured in the same way as the above-described embodiment are given the same reference numerals, and redundant descriptions are omitted.

  Furthermore, in the above-described embodiment, the example in which the two electrode portions of the first electrode portion 60 and the second electrode portion 70 are provided has been described, but the present invention is not limited thereto. As an example, the second electrode unit 70 may be omitted. In other words, only one electrode portion may be provided. In this case, an electrode part can be comprised from a film-form transparent conductor, the conductor of a lattice pattern (mesh pattern), etc. For example, by applying a voltage from the four corners of the electrode portion and observing the current value of the current flowing from the four corners when the outer conductor is in contact with the display surface (at the time of touching), Can be specified on a coordinate axis along the display surface.

  Further, in the above-described embodiment, the positioning mark 65 and the external lead-out line 63 are simultaneously formed from the same material by the same etching process using a photolithography technique, but the present invention is not limited to this. The positioning mark 65 may be formed first, and the external lead-out line 63 may be formed using the formed positioning mark 65 as a reference. Further, at this time, the electrode part 60 may be formed integrally with the external lead-out line 63 from the same material as the external lead-out line 63. Also by such a method, the external lead-out line 63 can be accurately positioned with respect to the positioning mark 65 that has been formed on a plane along the plate surface of the first substrate 50.

  Furthermore, in the second embodiment described above, as shown in FIG. 7, electrodes for the touch panel (first electrode portion 60 and second electrode portion 70) are provided between the polarizing plate 59 and the first base material 52. Although an example of arrangement is shown, the present invention is not limited to this. For example, the polarizing plate 59 may be positioned between the adhesive layer 69 and the first base material 52. That is, the polarizing plate 59 may be positioned between the electrodes for the touch panel (the first electrode unit 60 and the second electrode unit 70) and the first base material 52.

  Furthermore, although the example which comprises a liquid crystal display device (liquid crystal display panel) using the 1st board | substrate (counter substrate, display apparatus substrate) 50 was shown in embodiment mentioned above, it is not restricted to this. By using the first substrate 50 described above, a display device other than the liquid crystal display device, for example, an EL display device or a plasma display can be configured. Further, when it is not necessary to arrange an electrode (transparent electrode layer 58) for controlling light emission of each pixel on the first substrate (counter substrate, display device substrate) 50, the first substrate is naturally. The transparent electrode layer 58 may be deleted from the (opposite substrate, display device substrate) 50.

  In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

FIG. 1 is a diagram for explaining a first embodiment according to the present invention and schematically showing a configuration of a display device. FIG. 2 is a cross-sectional view showing the display panel incorporated in the display device of FIG. 1 in a cross section along the normal direction to the display surface of the display device. FIG. 3 is a view for explaining the configuration of the electrode portion of the display device substrate (first substrate) incorporated in the display panel of FIG. 2, and shows the display panel with the color filter layer and the like removed. It is a top view. Note that FIG. 3 substantially corresponds to a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a plan view showing a color filter layer of a display device substrate (first substrate) incorporated in the display panel of FIG. FIG. 5A is a top view showing a display device substrate (first substrate) incorporated in the display panel of FIG. 2, for explaining an example of the configuration of each layer in the non-display area A2 of the display device substrate. FIG. 5B is a cross-sectional view taken along line BB in FIG. 5A. FIG. 5C is a cross-sectional view taken along line CC of FIG. 5A. FIG. 5D is a cross-sectional view taken along the line DD of FIG. 5A. FIG. 5E is a cross-sectional view taken along line EE of FIG. 5A. FIG. 6 is a flowchart for explaining an example of a method for manufacturing a display device substrate (first substrate) incorporated in the display panel of FIG. FIG. 7 is a diagram corresponding to FIG. 2 and schematically showing the configuration of the display device according to the second embodiment. FIG. 8 is a flowchart for explaining an example of a method for manufacturing a display device substrate (first substrate) incorporated in the display panel of FIG. FIG. 9 is a diagram corresponding to FIG. 2 for explaining a modification of the display device substrate (first substrate). FIG. 10 is a diagram corresponding to FIG. 3 and is a diagram for explaining a modified example of the electrode portion.

DESCRIPTION OF SYMBOLS 10 Display apparatus 12 Display surface 20 Control part 30 Surface light source device 40 Display panel 45 Liquid crystal layer 50 Color filter (opposite board | substrate, 1st board | substrate, display apparatus board | substrate, color filter board | substrate)
52 Base material (first base material)
54 Color filter layer 55 Light-shielding part 55a Main body part 55b Colored part 56, 56R, 56G, 56B Colored part 58 Transparent electrode layer 60 First electrode part (electrode part)
61 Conductor (Linear conductor)
63 External lead-out line 65 Positioning mark (alignment mark)
67 Insulating layer (insulating film)
68 Filter 70 Second electrode part (electrode part)
71 Conductor (Linear Conductor)
77 Insulating layer (insulating film)
79 Insulating layer (insulating film)
80 substrate (second substrate, element substrate, array substrate)

Claims (8)

A color filter used in a display device having a touch panel function of a capacitive coupling method and capable of detecting contact with a display surface,
A substrate;
A color filter layer having a light-shielding portion formed in a predetermined pattern defining an opening, and a colored portion formed in the opening;
Provided between the color filter layer and the substrate, or provided on the opposite side of the substrate to the color filter layer, for detecting the contact when incorporated in the display device An electrode portion configured to be electrically connected to a circuit,
The light shielding portion of the color filter layer is provided so as to be electrically conductive and insulated from the electrode portion, and is configured to be grounded when incorporated in the display device. Color filter to be used. A transparent electrode layer disposed on the side of the color filter layer opposite to the side facing the substrate, further comprising:
The transparent electrode layer is configured to function as an electrode for controlling display of each pixel when incorporated in the display device,
2. The color filter according to claim 1, wherein the light shielding portion of the color filter layer is disposed between the transparent electrode layer and the electrode portion so as to be insulated from the transparent electrode layer. . The electrode unit includes a first electrode unit disposed between the color filter layer and the base material, and a second electrode unit disposed between the first electrode unit and the color filter layer. Have
An insulating layer that insulates the first electrode portion and the second electrode portion is formed between the first electrode portion and the second electrode portion,
The first electrode unit includes a plurality of conductors arranged in one direction, each including a plurality of conductors extending in a direction intersecting the one direction,
The second electrode portion includes a plurality of conductors arranged side by side in another direction different from the one direction, each including a plurality of conductors extending in a direction intersecting the other direction. The color filter according to claim 1 or 2, wherein the color filter is characterized in that: The electrode unit includes a first electrode unit disposed on a side of the substrate opposite to the color filter layer, a second electrode unit disposed between the first electrode unit and the substrate, Have
An insulating layer that insulates the first electrode portion and the second electrode portion is formed between the first electrode portion and the second electrode portion,
The first electrode unit includes a plurality of conductors arranged in one direction, each including a plurality of conductors extending in a direction intersecting the one direction,
The second electrode portion includes a plurality of conductors arranged side by side in another direction different from the one direction, each including a plurality of conductors extending in a direction intersecting the other direction. The color filter according to claim 1 or 2, wherein the color filter is characterized in that: The color filter according to claim 3, wherein the one direction is orthogonal to the other direction. The light shielding part of the color filter layer includes a main body part having at least a surface thereof made of metal, and an antireflection part arranged on the base material side of the main body part. The color filter as described in any one of 1-5. A display device comprising the color filter according to claim 1. A substrate disposed opposite to the color filter;
The display device according to claim 7, further comprising: a liquid crystal layer disposed between the color filter and the substrate.

Images