JPWO2012157222A1 - Front panel for touch panel, display device provided with the same, and integrated sensor substrate of front panel for touch panel and touch panel sensor - Google Patents

Abstract

  Infrared communication of the infrared communication unit provided below the frame part of the front panel of the touch panel sensor is realized without providing an infrared communication window having an infrared transmission film in the frame part. By forming the frame portion of the front plate from a material that absorbs visible light and transmits infrared rays, it is unnecessary to conceal the wiring and to provide an infrared communication window in the frame portion. As a result, the number of steps and the manufacturing cost are prevented from increasing, and the inconvenience due to the level difference caused by forming the infrared transmission film on the frame portion is also eliminated.

Description

  The present invention relates to a front panel for a touch panel for a display device, and more particularly to a front panel for a touch panel having a frame portion at the peripheral edge.

  In recent years, a touch panel has been adopted as an operation unit of an electronic device such as a mobile phone or a portable information terminal. The touch panel is configured by bonding a position input device capable of detecting a contact position such as a finger on a display screen of a display device such as a liquid crystal panel or an organic EL (Electro-Luminescence). The touch panel system is roughly classified into a resistance film type, a capacitance type, an optical type, and an ultrasonic type, and each has a merit / demerit, and is used properly according to the application. The capacitance type further includes a surface type and a projection type. A projected capacitive touch panel includes a plurality of electrodes arranged on a grid in the X direction and the Y direction, is capable of multi-touch, and is currently spreading rapidly.

  There are a film type and a glass type in the projected capacitive touch panel sensor substrate. Although the film type has the advantage of being lightweight and difficult to break, it is difficult to form a high-definition wiring pattern, the frame area covering the wiring is enlarged, the display area is narrowed, and the smoothness of the surface Due to the difference, there is a problem that it looks worse than the glass type. For smartphones and tablet computers, the glass type is often adopted, and the use of the glass type is expected in the future.

  The projected capacitive touch panel sensor substrate generally has a five-layer structure, that is, metal wiring, two transparent electrodes for X and Y directions, an interlayer insulating layer between two transparent electrodes, It consists of a protective layer. In addition, a single-sided structure in which two transparent electrode layers are formed on one side of a glass substrate by forming an interlayer insulating layer with an organic film, and the glass substrate is also used as an interlayer insulating layer, and the two transparent electrode layers are made of glass. It is roughly divided into two types of double-sided structures formed separately on both sides.

  Here, it is common for a display such as a cellular phone to employ a structure in which a front plate (cover glass) is provided on the outermost surface. The cover glass is formed with a frame portion made of a highly light-shielding material for concealing peripheral wiring and the like. Various colors and patterns can be applied to the frame portion according to the design of the device. When applying a color or a pattern to a frame part, it is common to form a frame part by screen printing. However, since it will lead to a cost increase when various colors and patterns are applied to the frame portion, the frame portion is mainly black (see, for example, Patent Document 1).

Generally, a material in which carbon or titanium is dispersed as a pigment is used as the ink or resist used when forming the black frame portion. A material in which carbon or titanium is dispersed has a low volume resistivity and a high relative dielectric constant. In addition, a material whose volume resistivity is increased to 1 × 10 ¹¹ Ω · cm by coating carbon with a resin is also employed.

  A mobile phone or the like has an infrared communication unit for infrared communication with other mobile phones and the like, and is generally disposed below a region where the frame portion of the front plate is located (inward of the mobile phone or the like). . This is because the frame portion is located outside the display area and is configured to be larger than the display device, so that a space for placing the infrared communication unit can be provided below the frame portion.

  FIG. 20 shows an example of a cover glass of a touch panel used for a conventional mobile phone or the like. 20A is a cross-sectional view, and FIG. 20B is a plan view. Moreover, the dashed-two dotted line shown to (b) of FIG. 20 represents the cutting position of sectional drawing of (a).

  As shown in FIGS. 20A and 20B, a frame portion 103 having a rectangular frame shape is formed on the cover glass 102, and the inside of the frame portion 103 is a display region 110. As described above, since the frame portion 103 is formed of a material having high light shielding properties, visible light and infrared rays are not transmitted as they are. Therefore, an opening in which no light shielding material is formed is provided in the frame portion 103, and the infrared communication window 140 and the proximity sensor window 150 are formed as shown in FIGS. 20 (a) and 20 (b).

  An infrared communication unit (not shown) performs infrared transmission / reception via the infrared communication window 140. Further, a proximity sensor (not shown) senses that an object is approaching through the proximity sensor window 150, such as when an ear is approaching, and saves power by turning off the display unit. Here, as shown in FIGS. 20A and 20B, the infrared communication window 140 and the infrared transmission film 141 are formed on the infrared communication window 140 and the surrounding area by screen printing or the like. This is because the infrared ray transmitting film 141 blocks visible light entering from the infrared communication window 140 and transmits infrared rays for infrared communication. Further, in the proximity sensor window 150, a visible region semi-transmissive film (not shown) is formed by screen printing or the like in the proximity sensor window 150 and the surrounding area.

JP 2009-69321 A JP 2007-178758 A

  However, when the infrared communication window 140 is provided in the frame portion 103, it is necessary to form the infrared transmission film 141 on the frame portion 103, which disadvantageously increases the number of processes and the manufacturing cost. It was.

  Further, as shown in FIG. 20A, when the infrared transmission film 141 is formed, a step 141 a is generated with respect to the surface of the frame portion 103. The step 141a has a disadvantage that the front plate becomes thicker.

  Further, when the infrared communication window 140 is provided at a predetermined position of the frame portion 103, the infrared communication portion is disposed below the infrared communication window 140. That is, there is a problem that the infrared communication unit cannot be arranged at an arbitrary position below the frame portion 103.

  The object of the present invention employs the following configuration in order to solve the above disadvantages.

  The present invention relates to a front plate used for a capacitive touch panel. The front plate is provided with a frame portion that is formed on a peripheral portion on one surface thereof and divides a display area of a predetermined shape, the front plate is made of a transparent material, and the frame portion is made of a mixture of two or more kinds of pigments. A pseudo black layer having a transmittance of 20% or less for light having a wavelength of 400 nm to 750 nm.

  The frame portion is made of a material that transmits infrared rays.

  Moreover, the average light transmittance in the wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more.

  The frame portion includes at least a red and blue pigment, or a red, blue and yellow pigment.

  Further, the optical density (OD value) of the frame portion is 3 or more.

Further, the volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more and the relative dielectric constant is 10 or less.

  Further, the frame portion is formed by a photolithography method or a screen printing method.

  Moreover, the cut surface of the frame part by the surface orthogonal to the front plate is a forward tapered shape.

  And the other situation of this invention is related with a display apparatus provided with a front plate. The display device has a pixel region in which a plurality of pixels are arranged in a matrix, and based on an input signal, a display panel that configures the pixel in the pixel region, a touch panel sensor attached to cover the pixel region, The above-mentioned front plate is provided.

  In addition, the display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays, and the infrared reception or / and transmission unit is provided below a region having a frame portion formed on the front plate. It is characterized by.

  Another aspect of the present invention relates to an integrated sensor substrate including a front plate and a capacitive touch panel sensor. This integrated sensor board is formed on a transparent front plate, a frame portion formed on a peripheral portion on one surface of the front plate, and a display portion having a predetermined shape, and is laminated on one surface and the frame portion of the front plate. A sensor layer integrated with the front plate, wherein the sensor layer includes a first transparent electrode and a second transparent electrode that are insulated from each other, and the frame portion includes a mixture of two or more types of pigments; The pseudo black layer has a transmittance of 20% or less for light having a wavelength of 400 nm to 750 nm.

  The frame portion is made of a material that transmits infrared rays.

  Moreover, the average light transmittance in the wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more.

  The frame portion includes at least a red and blue pigment, or a red, blue and yellow pigment.

  The optical density (OD value) of the frame portion is 3 or more.

Further, the volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more and the relative dielectric constant is 10 or less.

  The metal wiring connected to the sensor layer is directly formed on the surface of the frame portion.

  Further, the frame portion is formed by a photolithography method or a screen printing method.

  Moreover, the cut surface of the frame part by the surface orthogonal to the front plate is a forward tapered shape.

  And the other situation of this invention is related with a display apparatus provided with the integrated sensor board | substrate of a front plate and a touch panel sensor. This display device has a pixel region in which a plurality of pixels are arranged in a matrix, and an integrated sensor substrate that is attached so as to cover the pixel region based on an input signal, and a display panel that constitutes the pixel in the pixel region It is characterized by providing.

  The display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays, and the infrared reception or / and transmission unit is provided below a region having a frame portion formed on the front plate. It is characterized by.

  According to the present invention, since it has the above-described features, the following can be achieved.

  That is, it is a front plate used for a touch panel, and this front plate is formed on a peripheral portion on one surface thereof and has a frame portion that partitions a display area of a predetermined shape, and the front plate is made of a transparent material. Since the frame portion is a pseudo black layer having a light transmittance of 20% or less for light having a wavelength of 400 nm to 750 nm, the wiring can be hidden.

  In addition, since the frame portion is made of a material that transmits infrared rays, the manufacturing process of the cover glass that is the front plate is simplified as compared with the case where an infrared transmission window is formed on the frame portion by providing an infrared communication window. In addition, the front plate can be made thin.

  Moreover, since the average light transmittance in the wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more, infrared rays can be transmitted reliably.

  Further, since the frame portion contains at least a red and blue pigment or a red, blue and yellow pigment, it can be made pseudo black.

  Further, since the optical density (OD value) of the frame portion is 3 or more, visible light can be absorbed with certainty.

Further, since the volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more and the relative dielectric constant is 10 or less, even when the metal wiring is in contact with the frame portion, Responsiveness of capacitive coupling type touch panel can be secured.

  Further, since the frame portion is formed by a photolithography method or a screen printing method, the frame portion can be reliably formed at a predetermined position of the cover glass.

  Moreover, since the cut surface of the frame part by the surface orthogonal to the front plate has a forward tapered shape, it is possible to prevent disconnection of the wiring arranged in the frame part.

  Furthermore, since the front plate used for this touch panel has a frame portion composed of at least a red-based and blue-based, red-based, blue-based, and yellow-based pigment, the black phase of the frame portion is made of conventional carbon or Compared with the case where the frame portion is formed using a material in which titanium is dispersed as a pigment, the frame portion is closer to black in black display, and thus the frame portion is not conspicuous, and the front plate is of good quality used for a touch panel.

  In addition, the display device includes a pixel area in which a plurality of pixels are arranged in a matrix, and a display panel that configures the pixels in the pixel area based on an input signal, and a touch panel attached to cover the pixel area Since the sensor and the front plate are provided, it is possible to simplify the manufacturing process of the cover glass, which is the front plate, compared to the case where an infrared communication window is formed in the frame portion and an infrared transmission film is formed. The display device can be thinned.

  In addition, the display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays, and the infrared reception or / and transmission unit is provided below a region having a frame portion formed on the front plate. Therefore, the infrared reception or / and transmission part can be arranged at an arbitrary position in a region having a frame part.

  Also, an integrated sensor substrate of a front plate and a capacitive touch panel sensor, which is formed on a transparent front plate and a peripheral portion on one surface of the front plate, and partitions a display area of a predetermined shape And a sensor layer laminated on one surface and the frame portion of the front plate and integrated with the front plate, and the frame portion has a pseudo black layer having a light transmittance of 20% or less at a wavelength of 400 nm to 750 nm. Therefore, the wiring can be hidden.

  In addition, since the frame portion is made of a material that transmits infrared rays, the manufacturing process of the entire integrated sensor substrate can be simplified compared to the case where an infrared communication window is formed on the frame portion and an infrared transmission film is formed. The integrated sensor substrate can be thinned.

  Moreover, since the average light transmittance in the wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more, infrared rays can be transmitted reliably.

  Further, since the frame portion contains at least a red and blue pigment or a red, blue and yellow pigment, it can be made pseudo black.

  In addition, since the frame portion contains a violet pigment, it easily absorbs light in the vicinity of a wavelength of 550 nm as compared with red, blue, and yellow pigments, and is black with a higher optical density (OD value). be able to.

  Further, since the optical density (OD value) of the frame portion is 3 or more, visible light can be absorbed with certainty.

Further, since the volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more and the relative dielectric constant is 10 or less, metal wiring can be directly formed on the frame portion. Moreover, the responsiveness of the capacitive coupling type touch panel can be secured.

  In addition, since the metal wiring connected to the sensor layer is directly formed on the surface of the frame portion, the configuration can be simplified.

  Further, since the frame portion is formed by the photolithography method or the screen printing method, the frame portion can be reliably formed at a predetermined position of the cover glass.

  Moreover, since the cut surface of the frame part by the surface orthogonal to the front plate has a forward tapered shape, it is possible to prevent disconnection of the wiring arranged in the frame part.

  And this invention relates to a display apparatus provided with the integrated sensor board | substrate of a front plate and a touch panel sensor. And it has a pixel region where a plurality of pixels are arranged in a matrix, and includes a display panel that constitutes a pixel in the pixel region based on an input signal, and an integrated sensor substrate that is attached so as to cover the pixel region Therefore, compared with the case where an infrared communication window is provided in the frame portion and an infrared transmission film is formed, the manufacturing process of the cover glass as the front plate can be simplified and thinned. can do.

  The display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays, and the infrared reception or / and transmission unit is provided below a region having a frame portion formed on the front plate. Therefore, the infrared reception or / and transmission part can be arranged at an arbitrary position in a region having a frame part.

  Further, since the display device includes a frame portion composed of at least a red-based and blue-based, red-based, blue-based, and yellow-based pigment, when the display area is black, the black phase of the frame portion is Compared to the case where the frame portion is formed using a material in which carbon or titanium is dispersed as a pigment, the black color in the display area is closer to black, so that the frame portion is not conspicuous and the display device is of good quality.

FIG. 1 is a schematic plan view showing a touch panel sensor according to the first embodiment of the present invention. FIG. 2 is a schematic plan view showing the main structure of the touch panel sensor according to the first embodiment. FIG. 3 is a schematic cross-sectional view showing the structure of the touch panel sensor according to the first embodiment. FIG. 4 is a schematic cross-sectional view showing the structure of the touch panel sensor according to the first embodiment. FIG. 5 is a graph showing the light transmission characteristics of each pigment according to the first embodiment. FIG. 6 is a graph showing the light transmission characteristics of each pigment according to the first embodiment. FIG. 7 is a schematic cross-sectional view showing a structure when the touch panel sensor and the display device according to the first embodiment are integrated. FIG. 8 is a schematic cross-sectional view showing a structure when the touch panel sensor and the display device according to the second embodiment are integrated. FIG. 9 is a schematic cross-sectional view showing a structure when the touch panel sensor and the display device according to the third embodiment are integrated. FIG. 10 is a schematic cross-sectional view showing a structure when the touch panel sensor and the display device according to the fourth embodiment are integrated. FIG. 11 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 12 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 13 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 14 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 15 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 16 is a schematic diagram illustrating a touch panel sensor according to an embodiment of the present invention. FIG. 17 is a graph showing the light transmission characteristics of the frame portion according to the embodiment of the present invention. FIG. 18 is a graph showing the light transmission characteristics of the frame portion according to the embodiment of the present invention. FIG. 19 is a graph showing the light transmission characteristics of the frame portion according to the embodiment of the present invention. FIG. 20 is a schematic diagram illustrating a structure of a front plate of a conventional touch panel sensor.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
A touch panel sensor according to a first embodiment of the present invention will be described with reference to FIGS. In the touch panel sensor according to the present embodiment, the cover glass and the touch sensor are directly formed integrally. Moreover, it has the structure which provides a metal wiring in a frame part.

  FIG. 1 is a plan view of a touch panel sensor 1 according to the present embodiment. FIG. 2 is a plan view showing details of the laminated structure of the touch panel sensor 1 shown in FIG. 1, and shows a state before the insulating protective film 9 of FIG. 1 is formed. 3 is a cross-sectional view taken along line AA shown in FIG. 1, and FIG. 4 is a cross-sectional view taken along line BB shown in FIG. In FIG. 1 to FIG. 4, in order to simplify the illustration, two lines of electrode patterns are schematically shown in each of the X direction and the Y direction. Electrodes are provided. FIG. 7 shows a form in which the display device is directly attached to the touch panel sensor according to the present embodiment and integrated, and corresponds to a cross-sectional view taken along the line AA shown in FIG.

  The touch panel sensor 1 is a position input device used in combination with a display device such as a liquid crystal panel 21 or an organic EL panel. The touch panel sensor 1 has a plurality of electrodes extending in the X direction and a plurality of electrodes extending in the Y direction, and specifies the coordinates of the contact position of the finger by detecting a change in electrostatic capacitance of the electrode in contact with or close to the finger. To do.

  Specifically, the touch panel sensor 1 includes a cover glass 2, a frame portion 3, a plurality of jumper wirings 4, a first insulating film 5, a metal wiring 6, and a plurality of transparent electrodes that are first transparent electrodes. The electrode 7 includes a plurality of transparent electrodes 8 that are second transparent electrodes, and an insulating protective film 9.

  The cover glass 2 is a transparent front plate serving as the outermost surface of the touch panel sensor 1 and is a member touched by the user. In the present embodiment, an example in which the cover glass 2 is used as the front plate will be described. However, instead of glass, a heat-resistant transparent resin material may be used as the front plate. Moreover, the transparent plate which consists of resin materials may be stuck on the glass surface, and you may form from several layers.

  The frame portion 3 is formed on one surface of the cover glass 2 using an infrared transmitting material that absorbs visible light and transmits infrared light. The frame part 3 divides a display area 10 having a predetermined shape in a central window part and plays a role of hiding wiring provided on the peripheral part of the touch panel sensor 1.

  The frame portion 3 is formed in a rectangular frame shape so as to partition the display region 10 at the peripheral edge of the cover glass 2. Note that the planar shape of the frame portion 3 is not limited to the rectangular frame shape as in the present embodiment, and may be any shape such as a heart shape, an egg shape, or a round shape. Further, the outer peripheral edge shape (outer shape) and the inner peripheral edge shape (the shape of the display area 10) of the frame part 3 may be similar or dissimilar.

  As shown in FIG.3 and FIG.4, the cut surface of the frame part 3 orthogonal to one surface of the cover glass 2 is a forward taper shape. Here, about the shape of the cut surface of the frame part 3, for example, when it is a reverse taper (overhang shape), there exists a possibility that wiring, such as the transparent electrode 7 of the touch panel sensor 1, may be disconnected. For this reason, about the shape of the cut surface of the frame part 3, it is advantageous with respect to a disconnection that it is a forward taper. Therefore, the frame portion 3 is formed to have a forward tapered shape according to the resist formulation and process conditions.

  The frame portion 3 is made of a photo-cured product of a pigment resist that absorbs visible light and transmits infrared rays. Here, the pigment-based resist is a resin in which a pigment is dispersed in a resin dissolved in a solvent. The photo-cured product of the pigment-based resist means that the pigment-based resist is subjected to an exposure process by a photolithography method. It is hardened by.

  The degree of absorption of visible light is generally represented by a value called an OD value in terms of optical density. The measurement is performed using a Macbeth optical densitometer or the like in accordance with the JIS-K-7605 standard, and is obtained by irradiating the sample with a vertically transmitted light beam and expressing the ratio of the state without the sample with log (logarithm). . The higher the optical density, the lower the transmittance, and the optical density becomes 0 at a transmittance of 100%.

  In this embodiment, the pigment-based resist is a pseudo black resist containing a mixture of at least two types of pigments other than carbon black and titanium oxide. As an example, a pigment used in forming a colored transparent layer of a color filter, C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 57: 1, 81, 81: 1, 81: 2, 81: 3, 81: 4, 97, 122, 123, 146, 149, 166, 168, 169, 176, 177, 178, 179, 180, 184, 185, 187, 192,200,202,208,210,215,216,217,220,223,224,226,227,228,240,242,246,254,255,264,270,272,273,274,276, Red (RED) pigments typified by 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, and the like; I. At least a blue (BLUE) pigment typified by CI Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 22, 60, 64, 80, etc. Therefore, a pseudo black color can be used. Further, basic dyes exhibiting red and purple, acidic dyes, and salt-forming compounds of these dyes can also be used.

  In this embodiment, in addition to the red pigment and the blue pigment, a yellow (YELLOW) pigment may be added. It is known that yellow pigments absorb light in the low wavelength region of visible light, that is, light having a wavelength of 500 nm or less (for example, “Shoji Shiji (1965)“ Printing Ink Class ”(Nihon Printing Shimbun) P170. 173). By adding a yellow pigment to a red pigment and a blue pigment, the yellow pigment absorbs low-wavelength visible light and can be made closer to black.

  Examples of yellow (YELLOW) pigments include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 125, 126, 127, 128, 129, 137, 138, 139, 144, 146, 147, 148, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 17 , And the like is 175,176,177,179,180,181,182,185,187,188,193,194,198,199,213,214,218,219,220,221. Further, basic dyes exhibiting yellow, acidic dyes and salt-forming compounds of these dyes can be used in combination.

  In the pigment-based resist of this embodiment, a violet pigment may be further added. By adding a violet pigment, it is easy to absorb light in the vicinity of a wavelength of 550 nm as compared with the case where it is not added, and a black having a higher optical density (OD value) can be obtained.

  Further examples of purple pigments include C.I. I. Pigment violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 42, 50.

  Further, a pigment such as an orange pigment or a green pigment may be added. Examples of the orange pigment include C.I. I. Pigment orange 36, 43, 51, 55, 59, 61, 71, 73, and the like. Examples of the green pigment include C.I. I. And green pigments such as CI Pigment Green 7, 10, 36, 37, and 58.

  5 and 6 show the light transmission characteristics of the red, blue, yellow, and purple pigments. FIG. 5A shows the red pigment C.I. I. Pigment Red 254 and 177 will be described. FIG. 5B shows the blue pigment C.I. I. Pigment Blue 15: 6 and 15: 3 are shown. FIG. 6A shows the yellow pigment C.I. I. Pigment Yellow 139 and 185 are shown. FIG. 6B shows the purple pigment C.I. I. The pigment violet 23 will be described. As these figures show, each color pigment has a wavelength range with low transmittance, and by mixing each color pigment, the transmittance is reduced over the entire visible light wavelength range of 400 nm to 750 nm. Can do.

  When a red pigment and a blue pigment are mixed, the mixing ratio is preferably 30:70 to 70:30, and more preferably 40:60 to 60:40. When the mixing ratio of the red pigment and the blue pigment is outside the range of 30:70 to 70:30, the concealability in the vicinity of the wavelength 550 nm, which is most easily visible, decreases, and the optical density (OD value) of the frame portion 3 is reduced. It becomes less than 3, and good light shielding properties cannot be obtained.

  When a red pigment, a blue pigment, and a yellow pigment are mixed, the ratio of the red pigment is 40 to 60% when the total pigment is 100%, the ratio of the blue pigment is 30 to 50%, yellow The proportion of the system pigment is preferably 5 to 20%. When mixed outside this range, the concealability near the wavelength of 550 nm, which is most easily visible, is lowered, the optical density (OD value) of the frame portion 3 is less than 3, and good light shielding properties cannot be obtained.

  When a red pigment, a blue pigment, a yellow pigment, and a purple pigment are mixed, the ratio of the red pigment is 40 to 60% when the total pigment is 100%, and the ratio of the blue pigment is 30 to 30%. It is preferable that the proportion of yellow pigment is 5 to 20% and the proportion of purple pigment is 10 to 30%. When mixed outside this range, the concealability near the wavelength of 550 nm, which is most easily visible, is lowered, the optical density (OD value) of the frame portion 3 is less than 3, and good light shielding properties cannot be obtained.

  The pigment resist of this embodiment may further contain a photopolymerization monomer, a photopolymerization initiator, a sensitizer, a polyfunctional thiol, an ultraviolet absorber, and a polymerization inhibitor as exemplified below.

<Photopolymerization monomer>
Photopolymerizable monomers include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene oxide modified trimethylolpropane tri (meth) acrylate, propylene oxide modified trimethylol Examples thereof include various acrylic esters and methacrylic esters such as propane tri (meth) acrylate.

<Photopolymerization initiator>
As photopolymerization initiators, 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, p-dimethylaminoacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane- 1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4- Acetophenones such as morpholinophenyl) -butan-1-one and 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone Compound, benzoin, benzoin methyl ether, benzoin ethyl ether, ben Benzoin compounds such as inisopropyl ether and benzyldimethyl ketal, benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3 Benzophenone compounds such as', 4,4'-tetra (t-butylperoxycarbonyl) benzophenone, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-diethyl Thioxanthone compounds such as thioxanthone, 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2 (P-methoxyphenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-tolyl) -4,6-bis (trichloromethyl) -s-triazine, 2-piperonyl-4,6 -Bis (trichloromethyl) -s-triazine, 2,4-bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphth-1-yl) -4,6-bis (trichloromethyl) -s -Triazine, 2- (4-methoxy-naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2,4-trichloromethyl- (piperonyl) -6-triazine, 2,4- Triazine compounds such as trichloromethyl (4′-methoxystyryl) -6-triazine, 1,2-octanedione, 1- [4- (phenylthio) phenyl-, 2- (O-ben) Oxime)], O- (acetyl) -N- (1-phenyl-2-oxo-2- (4′-methoxy-naphthyl) ethylidene) hydroxylamine and the like, bis (2,4,6- Phosphine compounds such as trimethylbenzoyl) phenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, 2,2′-bis (o-chlorophenyl) -4,5,4 ′, 5′-tetraphenyl -1,2'-biimidazole, 2,2'-bis (o-methoxyphenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'-bis (o-chlorophenyl) -4 , 4 ′, 5,5′-tetra (p-methylphenyl) biimidazole, imidazole compounds, 9,10-phenanthrenequinone, camphor -Quinone compounds such as quinone and ethyl anthraquinone, borate compounds, carbazole compounds, titanocene compounds and the like.

  Among these, it is more preferable to include at least one photopolymerization initiator selected from the group consisting of acetophenone compounds, phosphine compounds, and oxime ester compounds.

  These photopolymerization initiators can be used alone or in combination of two or more at any ratio as required. Content of a photoinitiator can be used in the quantity of 1.0-200 weight part with respect to 100 weight part of coloring agents, Preferably it is 1.0-150 weight part.

<Sensitizer>
Examples of the sensitizer include unsaturated ketones represented by chalcone derivatives and dibenzalacetone, 1,2-diketone derivatives represented by benzyl and camphorquinone, benzoin derivatives, fluorene derivatives, naphthoquinone derivatives, anthraquinones. Derivatives, xanthene derivatives, thioxanthene derivatives, xanthone derivatives, thioxanthone derivatives, coumarin derivatives, ketocoumarin derivatives, cyanine derivatives, merocyanine derivatives, oxonol derivatives and other polymethine dyes, acridine derivatives, azine derivatives, thiazine derivatives, oxazine derivatives, indoline derivatives , Azulene derivatives, azulenium derivatives, squarylium derivatives, porphyrin derivatives, tetraphenylporphyrin derivatives, triarylmethane derivatives, tetrabenzoporphyrin derivatives Body, tetrapyrazinoporphyrazine derivative, phthalocyanine derivative, tetraazaporphyrazine derivative, tetraquinoxalyloporphyrazine derivative, naphthalocyanine derivative, subphthalocyanine derivative, pyrylium derivative, thiopyrylium derivative, tetraphyrin derivative, annulene derivative, spiropyran derivative, Examples include spirooxazine derivatives, thiospiropyran derivatives, metal arene complexes, organoruthenium complexes, Michler ketone derivatives, and the like. In the present invention, a derivative means a compound in which a part of the compound is modified with another atom or functional group, or is modified or oxidized or reduced with respect to the original compound. The derivative only needs to contain most of the skeleton of the original compound in terms of structure, and the derivative may exhibit completely different properties only by having a similar structure of the original compound.

  Specific examples include Okawara Nobu et al., “Dye Handbook” (1986, Kodansha), Okawara Nobu et al., “Functional Dye Chemistry” (1981, CMC), Ikemori Chusaburo et al., “Special Examples include, but are not limited to, sensitizers described in “Functional Materials” (1986, CMC). In addition, a sensitizer that absorbs light from the ultraviolet region to the near infrared region can also be contained.

  Among the sensitizers, particularly preferred sensitizers include thioxanthone derivatives, Michler ketone derivatives, and carbazole derivatives. More specifically, 2,4-diethylthioxanthone, 2-chlorothioxanthone, 2,4-dichlorothioxanthone, 2-isopropylthioxanthone, 4-isopropylthioxanthone, 1-chloro-4-propoxythioxanthone, 4,4′-bis (Dimethylamino) benzophenone, 4,4′-bis (diethylamino) benzophenone, 4,4′-bis (ethylmethylamino) benzophenone, N-ethylcarbazole, 3-benzoyl-N-ethylcarbazole, 3,6-dibenzoyl- N-ethylcarbazole or the like is used. The sensitizer may contain two or more sensitizers in any ratio. The content of the sensitizer can be used in an amount of 1.0 to 100 parts by weight with respect to 100 parts by weight of the photopolymerization initiator.

<Multifunctional thiol>
A polyfunctional thiol is a compound having two or more thiol (SH) groups. When a polyfunctional thiol is used together with a photopolymerization initiator, a thiyl radical that acts as a chain transfer agent and is less susceptible to polymerization inhibition by oxygen is generated in the radical polymerization process after light irradiation. Becomes high sensitivity. In particular, a polyfunctional aliphatic thiol in which an SH group is bonded to an aliphatic group such as methylene or ethylene group is preferable.

  For example, hexanedithiol, decanedithiol, 1,4-butanediol bisthiopropionate, 1,4-butanediol bisthioglycolate, ethylene glycol bisthioglycolate, ethylene glycol bisthiopropionate, trimethylolpropane tris Thioglycolate, trimethylolpropane tristhiopropionate, trimethylolethane tris (3-mercaptobutyrate), trimethylolpropane tris (3-mercaptobutyrate), trimethylolpropane tris (3-mercaptopropionate), Pentaerythritol tetrakisthioglycolate, pentaerythritol tetrakisthiopropionate, pentaerythritol tetrakis (3-mercaptopropionate), dipentaerythritol Hexhexakis (3-mercaptopropionate), trimercaptopropionic acid tris (2-hydroxyethyl) isocyanurate, 1,4-dimethylmercaptobenzene, 2,4,6-trimercapto-s-triazine, 2- (N, N-dibutylamino) -4,6-dimercapto-s-triazine and the like. These polyfunctional thiols can be used individually by 1 type or in mixture of 2 or more types.

  The content of the polyfunctional thiol is preferably 0.05 to 100 parts by weight, more preferably 1.0 to 50.0 parts by weight with respect to 100 parts by weight of the colorant. By using 0.05 part by weight or more of polyfunctional thiol, better development resistance can be obtained. When a monofunctional thiol having one thiol (SH) group is used, such an improvement in development resistance cannot be obtained.

<Ultraviolet absorber, polymerization inhibitor>
The pigment-based resist of this embodiment can control the pattern shape and resolution of the image area by containing an ultraviolet absorber or a polymerization inhibitor. Examples of the ultraviolet absorber include 2- [4-[(2-hydroxy-3- (dodecyl and tridecyl) oxypropyl) oxy] -2-hydroxyphenyl] -4,6-bis (2,4-dimethylphenyl). -1,3,5-triazine, 2- (2-hydroxy-4- [1-octyloxycarbonylethoxy] phenyl) -4,6-bis (4-phenylphenyl) -1,3,5-triazine, etc. Hydroxyphenyltriazine, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (2H-benzotriazol-2-yl) -4,6-bis (1-methyl-1-phenylethyl) phenol, Benzotriazoles such as 2- (3-tbutyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2,4-di Benzophenone series such as droxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, salicylate series such as phenyl salicylate, p-tert-butylphenyl salicylate Cyanoacrylates such as ethyl-2-cyano-3,3′-diphenylacrylate, 2,2,6,6, -tetramethylpiperidine-1-oxyl (triacetone-amine-N-oxyl), bis (2 , 2,6,6-tetramethyl-4-piperidyl) -sebacate, poly [[6-[(1,1,3,3-tetrabutyl) amino] -1,3,5-triazine-2,4-diyl ] Hindered amines such as [(2,2,6,6-tetramethyl-4-piperidinyl) imino] and the like. Properly it is used as a mixture of two or more.

  Examples of the polymerization inhibitor (I) include methyl hydroquinone, t-butyl hydroquinone, 2,5-di-t-butyl hydroquinone, 4-benzoquinone, 4-methoxyphenol, 4-methoxy-1-naphthol, t- Hydroquinone derivatives such as butylcatechol and phenol compounds, amine compounds such as phenothiazine, bis- (1-dimethylbenzyl) phenothiazine, 3,7-dioctylphenothiazine, copper dibutyldithiocarbamate, copper diethyldithiocarbamate, manganese diethyldithiocarbamate, diphenyldithiocarbamine Copper and manganese salt compounds such as manganese acid, 4-nitrosophenol, N-nitrosodiphenylamine, N-nitrosocyclohexylhydroxylamine, N-nitrosophenylhydroxy Nitroso compounds such as amines and their ammonium salts or aluminum salts and the like, used in combination singly, or two or more kinds.

  The total content of the ultraviolet absorber and the polymerization inhibitor can be used in an amount of 0.01 to 20 parts by weight, preferably 0.05 to 10 parts by weight with respect to 100 parts by weight of the colorant. By using 0.01 part by weight or more of the ultraviolet absorber or the polymerization inhibitor, better resolution can be obtained.

  For the frame part 3 composed of a photo-cured product of a pigment-based resist, it is preferable that the optical density (OD value) of the frame part 3 is 3 or more in order to sufficiently block the incident visible light. Further, in the visible light wavelength range of 400 nm to 750 nm, the transmittance is preferably 20% or less, and particularly preferably 10% or less. Moreover, in order to transmit infrared rays and to perform infrared communication, it is preferable that the average light transmittance of the frame portion 3 in the wavelength range of 850 nm to 1000 nm is 80% or more.

  The relative permittivity of the photo-cured product of the pigment-based resist is preferably 10 or less, more preferably 5.0 or less. This is to ensure the responsiveness of the capacitively coupled touch panel. Further, when the relative dielectric constant is 4.0 or less, the formation of the electrostatic capacity of the pigment resist can be suppressed.

Here, the relative dielectric constant is expressed as a ratio ε / ε ₀ of the dielectric constant ε of the medium and the dielectric constant ε ₀ of the vacuum, and is a dimensionless amount that takes a constant value regardless of the unit system used. Although the relative dielectric constant is simply referred to as dielectric constant and may be expressed without distinction from the relative dielectric constant, the characteristics of the present invention are not limited by the difference in these expressions as long as the relative dielectric constant is meant.

  Measurement of relative permittivity is performed by preparing a test piece according to any of JIS-K-6911, JIS-C-6481, and ASTM-D-150 and using an impedance analyzer (LCR meter). In addition, a pigment resist may be formed on the aluminum vapor-deposited electrode so as to have a predetermined thickness, and a test piece produced by vapor-depositing the aluminum electrode thereon may be measured with an impedance analyzer. .

Moreover, since the metal wiring 6 and the transparent electrodes 7 and 8 are formed on the frame part 3 of this embodiment, it is necessary to ensure electrical insulation. That is, as the volume resistivity of the pigment-based resist, the conventional 1 × 10 ⁸ Ω · cm is insufficient, and 1 × 10 ⁹ Ω · cm or more is preferable. Furthermore, 1 × 10 ¹² Ω · cm or more is particularly preferable. When the volume resistivity of the photo resist of the pigment resist is less than 1 × 10 ⁹ Ω · cm, the metal wiring and the transparent electrode wiring formed on the frame made of the photo resist of the pigment resist are short-circuited (short). This is because the touch panel sensor does not operate normally.

  Here, the volume resistivity is a resistance per unit volume, and is an absolute value specific to a substance obtained by measuring the resistance between two electrodes having two opposite surfaces of a cube having a side of 1 cm as an electrode. is there. Although the volume resistivity is simply referred to as resistivity and may be expressed without distinction from volume resistivity, the feature of the present invention is not limited by the difference in these expressions as long as it means volume resistivity.

The volume resistivity is measured by preparing a test piece according to any of JIS-K-6911, JIS-K-6271, ASTM-D-257, and IEC-60093, and measuring the insulation resistance between the circular electrodes. Place four needle-shaped electrodes on a straight line on a test piece prepared according to the method of measuring electrical resistance (double ring electrode method) according to JIS-K-7194 standard, and between the two outer probes. This is performed using a method in which a constant current is passed and the potential difference generated between the two inner probes is measured to obtain the resistance (four-probe method). The double ring electrode method is suitable for measuring the resistivity of an insulator of 10 ⁸ to 10 ¹⁶ Ω, and 500 V is applied between the electrodes to measure the resistance value after 1 minute. From the electrode shape, the volume resistivity and This is a method for obtaining the surface resistivity. On the other hand, the four deep needle method is suitable for measuring the resistivity of a conductor of 10 ⁻² to 10 ⁷ Ω, and the volume resistivity is obtained by multiplying the measured resistance by a sample thickness and a correction coefficient RCF (Resitivity Correction Factor). Is calculated. These are properly used depending on the range of volume resistivity to be measured.

  The jumper wiring 4 is formed using a conductive material, and is intermittently arranged in a matrix on the cover in the display area 10 in the X direction parallel to one side of the display area 10 and in the Y direction orthogonal thereto. Has been. The jumper wiring 4 is for connecting the transparent electrodes 7 aligned in the X direction.

  The plurality of first insulating films 5 are provided corresponding to each of the jumper wirings 4. Each of the first insulating films 5 is formed so as to cross the corresponding jumper wiring 4 and extend in the Y direction, and partially overlaps the central portion of the jumper wiring 4 in the X direction. The first insulating film 5 functions as an interlayer insulating film between the jumper wiring 4 and the transparent electrode 8. In order to enable the X-direction connection between the jumper wiring 4 and the transparent electrode 7, the first insulating film 5 does not overlap both ends of the jumper wiring 4.

  The metal wiring 6 is directly formed on the frame part 3 and is electrically connected to the transparent electrodes 7 and 8 located at the peripheral part of the display area 10. In the present embodiment, the metal wiring 6 is made of a Mo / Al / Mo (molybdenum / aluminum / molybdenum) laminate, but may be formed of Au (gold), Ag (silver), an Ag alloy, or the like. good.

  The transparent electrode 7 is for detecting the X coordinate. The transparent electrode 7 is formed on the cover glass 2 in the display region 10 using a material having electrical conductivity and transparency. The transparent electrode 7 is intermittently arranged in a matrix in the X direction and the Y direction, and is electrically connected to the jumper wiring 4 adjacent in the X direction. The transparent electrode 7 is made of, for example, ITO (Indium Tin Oxide).

  The transparent electrode 8 is for detecting the Y coordinate. In the present embodiment, the transparent electrode 8 is formed in the same process as the transparent electrode 7 using the same material as the transparent electrode 7. The transparent electrode 8 extends in the Y direction between the columns of the transparent electrodes 7 aligned in the Y direction, and three-dimensionally intersects with the jumper wiring 4 on the first insulating film 5 as shown in FIGS. .

  The insulating protective film 9 is formed on almost the entire surface of the cover glass 2 except for the portion corresponding to the lead-out wiring of the metal wiring 6 so as to cover the jumper wiring 4, the metal wiring 6, the transparent electrodes 7 and 8, and the frame portion 3. Has been. The insulating protective film 9 functions as a protective film that protects each component formed on the cover glass 2.

  In the touch panel sensor 1 according to the present embodiment, the jumper wiring 4, the insulating film 5, the transparent electrodes 7 and 8, and the insulating protective film 9 correspond to the sensor layer.

  FIG. 7 shows a form when the liquid crystal panel 21 is directly attached to the touch panel sensor 1 according to the present embodiment as a display device and integrated. As shown in FIG. 7, the liquid crystal panel 21 includes polarizing plates 22 and 27, a front glass 23, a color filter 24, a layer 25 such as a liquid crystal / electrode / TFT, and a back glass 26.

  The liquid crystal panel 21 is illuminated from the back glass 26 side by a backlight (not shown). The image displayed on the liquid crystal panel 21 is visually recognized through the display area 10 inside the frame portion 3 formed on the cover glass 2 and is operated by the touch panel sensor 1. Further, the touch panel sensor 1 is wider than the liquid crystal panel 21 by the amount of the frame portion 3.

  In the present embodiment, as described above, the frame portion 3 is made of an infrared light shielding material that absorbs visible light and transmits infrared rays. Therefore, compared with a case where an infrared communication window is formed in the frame portion and an infrared transmission film is formed. And it becomes possible to simplify the manufacturing process of the cover glass 2 which is a front plate, and can make it thin. Furthermore, since it is not necessary to provide the infrared communication window at a specific position of the frame portion 3, the infrared communication portion can be provided at an arbitrary position below the frame portion 3.

  Further, the photo-cured product of the pigment-based resist used in the present embodiment has a lower relative dielectric constant and a higher volume resistivity than the photo-cured product of the black resist material for conventional color filters. Therefore, the sensor layer and the metal wiring 6 can be formed directly on the frame portion 3. In addition, since the number of steps is reduced because an insulating film that covers the frame portion 3 is not necessary, it is possible to realize cost reduction and yield improvement.

  In the present embodiment, the material of the frame portion 3 is subjected to an exposure process by a photolithography method. When the frame part 3 is formed by screen printing, the unevenness of the surface of the frame part 3 becomes rough, but when the frame part 3 is formed by photolithography, the surface of the frame part 3 becomes smooth. Therefore, the metal wiring 6 can be directly and stably formed on the frame portion 3.

  Here, when the infrared communication window is provided in the frame part 3 as in the conventional technique, it is necessary to form an infrared transmission film on the frame part 3, and when the infrared transmission film is formed, the frame is formed. A step is generated with respect to the surface of the portion 3. If the metal wiring 6 is provided on the step, there is an inconvenience that it is easy to disconnect. However, in the case of the present embodiment, the step due to the infrared transmission film does not occur in the frame portion 3, so that the metal wiring 6 can be formed at an arbitrary position of the frame portion 3.

(Second Embodiment)
A touch panel sensor according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different parts are described. FIG. 8 shows a form when the liquid crystal panel 21 is directly attached to the touch panel sensor 1 according to the present embodiment and integrated. In this embodiment as well, the cut surface of the frame portion 3 has the same forward tapered shape as in the first embodiment, but hereinafter, the description in the forward tapered shape is omitted in the drawings.

  The touch panel sensor 1 according to the present embodiment is the same as the first embodiment in that the touch sensor is directly formed on the cover glass 2, but the second insulating layer 11 is provided on the frame portion 3. The difference is that the metal wiring 6 is provided after the step is formed.

  In the first embodiment, the volume resistivity of the material constituting the frame portion 3 is large and the relative dielectric constant is low, and the material of the frame portion 3 is cured by performing an exposure process of a photolithography method to thereby surface the surface. The metal wiring 6 was directly formed on the frame portion 3 in a smooth manner. Here, when it is desired to ensure the insulation more reliably, or when the frame portion 3 is formed by screen printing and the surface unevenness is rough, as shown in FIG. It is preferable to form the insulating layer 11 and then provide the metal wiring 6.

  In the present embodiment, as described above, the frame portion 3 is made of an infrared transmitting material that absorbs visible light and transmits infrared rays. Therefore, an infrared transmission window is formed on the frame portion and an infrared transmission film is formed. In comparison, it is possible to simplify the manufacturing process of the cover glass 2 that is the front plate, and to reduce the thickness. Furthermore, since it is not necessary to provide the infrared communication window at a specific position of the frame portion 3, the infrared communication portion can be provided at an arbitrary position below the frame portion 3.

  Further, in the case where the metal wiring is provided in the frame portion as in the present embodiment, the step due to the infrared transmission film does not occur in the frame portion 3, so that the metal wiring can be formed at an arbitrary position of the frame portion 3. .

(Third embodiment)
With reference to FIGS. 9A and 9B, a touch panel sensor according to a third embodiment of the present invention will be described. In the third embodiment, the same parts as those described above are denoted by the same reference numerals, description thereof will be omitted, and only different parts will be described. 9A shows a state before assembly, and FIG. 9B shows a form when the liquid crystal panel 21 is integrated with the touch panel sensor 1 according to the present embodiment.

  As shown to (a) of FIG. 9, the touch panel sensor 1 is comprised from two parts, the cover glass 2 and the glass 31 for touch sensors. The cover glass 2 is formed with a frame portion 3 made of an infrared transmitting material that absorbs visible light and transmits infrared light. The touch sensor glass 31 has a plurality of jumper wirings 4, a first insulating film 5, a transparent electrode 8, and the like (not shown in FIG. 9) on one surface, as in the embodiment described so far. Then, the metal wiring 6 is formed. The liquid crystal panel 21 is provided with a spacer 28 at the end.

  (B) of FIG. 9 is one in which the above three members are pasted together. An air gap layer 29 is formed between the touch sensor glass 31 and the liquid crystal panel 21 by the amount of the spacer 28.

  In the present embodiment, as described above, the frame portion 3 is made of an infrared transmitting material that absorbs visible light and transmits infrared rays. Thus, the manufacturing process of the cover glass 2 that is the front plate can be simplified, and the cover glass 2 can be made thin. Furthermore, since it is not necessary to provide the infrared communication window at a specific position of the frame portion 3, the infrared communication portion can be provided at an arbitrary position below the frame portion 3.

(Fourth embodiment)
A touch panel sensor according to a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, the same parts as those described above are denoted by the same reference numerals, description thereof will be omitted, and only different parts will be described. FIG. 10 shows a form when the liquid crystal panel 21 is integrated with the touch panel sensor 1 according to the present embodiment.

  As shown in FIG. 10, in this embodiment, the touch panel sensor 1 is composed of two parts, a cover glass 2 and a touch sensor glass 31, as in the third embodiment. The third embodiment is different from the third embodiment in that the touch sensor glass 31 is used as an interlayer insulating layer and the transparent electrode 8 and the metal wiring 6 are formed on both surfaces thereof.

  In the present embodiment, as described above, the frame portion 3 is made of a material that absorbs visible light and transmits infrared rays, so that an infrared transmission window is formed in the frame portion and an infrared transmission film is formed. The manufacturing process of the cover glass 2 that is the front plate can be simplified and can be made thin. Furthermore, since it is not necessary to provide the infrared communication window at a specific position of the frame portion 3, the infrared communication portion can be provided at an arbitrary position below the frame portion 3.

  The touch panel sensor of the present invention is not limited to the above-described embodiments, and various modifications can be made. Although four types of configurations have been described as the above-described embodiments, the present invention is not limited to these structures. For example, the insulating film may be formed not only on a part of an electrode or the like but also as a layered insulating layer extending over the entire panel.

  In the above-described embodiment, the projected capacitive touch panel is described as the touch panel sensor. However, the touch capacitive sensor is not limited to the capacitive capacitive touch panel, and can be applied to various types of touch panels having a frame portion. Of course.

  Further, in the above-described embodiment, the infrared communication unit that performs transmission / reception communication using infrared rays has been described using a display such as a mobile phone provided below the frame portion. However, the present invention is not limited to this. Of course, the present invention can be applied to a display device having a function of either infrared transmission or infrared reception, such as a television receiver including an infrared remote control light receiving unit.

(Fifth embodiment)
This embodiment has the same configuration as that of the first to fourth embodiments except that a screen printing method is used instead of the photolithography method for forming the frame portion. The screen printing ink can be adjusted for screen printing by a conventionally known method based on a composition obtained by removing the photopolymerization initiator from the pigment-based resist of the present embodiment. As screen printing plates for printing this screen printing pigment-based ink in a desired pattern, polyester fiber cocoons, nylon fiber cocoons, and stainless metal cocoons are used, and there is little expansion and contraction, and ink and paste can be applied thickly. Stainless steel is preferably used. The film thickness is adjusted by selecting the number of meshes per inch determined by the screen weaving density called the number of meshes. Printing is performed with a screen printer using screen printing ink, a screen plate, and a squeegee, and pre-baking is performed as necessary to evaporate the organic solvent. For pre-baking, a hot air circulation oven, a hot plate, or an IR oven can be used. An arbitrary frame pattern can be obtained by performing a heat treatment after pre-baking. A heat drying oven can be used for the heat treatment, and heating is appropriately performed at a temperature range of about 150 ° C. to 230 ° C. for 10 minutes to 60 minutes in accordance with the curing conditions of the screen printing ink.

  In order to describe the present invention in more detail, examples will be given below, but the present invention is not limited to these examples. In this example, the manufacturing method for the configuration described in the second embodiment will be described in detail.

Example 1
FIGS. 11-16 is a figure which shows the manufacturing process of the touch-panel sensor 1 which concerns on a present Example. In FIGS. 11-16, (a) is sectional drawing, (b) is a top view. Moreover, the dashed-two dotted line shown to (b) of FIGS. 9-14 represents the cutting position of sectional drawing of (a).

<1. Formation of frame part 3>
First, a pigment resist (described later) that absorbs visible light and transmits infrared rays was applied on one surface of the cover glass 2 by spin coating.
Next, after removing the solvent with a vacuum drier, exposure was performed at 200 mJ / cm ² by a proximity exposure system (ultra-high pressure mercury lamp). Here, as the photomask for exposure, a soda glass patterned with Cr (chromium) was used.
Then, _Na 2 CO ₃ (sodium carbonate), and developed with NaHCO ₃ aqueous alkaline solution of a mixture of (sodium hydrogen carbonate).
Then, heat treatment was performed at 235 ° C. × 20 minutes to form the frame portion 3 shown in FIG.

<2. Formation of jumper wiring 4>
First, an ITO film was formed on the formation shown in FIG. 11 by heat sputtering, in which sputtering was performed while heating at 170 ° C. by a DC magnetron sputtering method.
Next, a general novolac positive resist was spin-coated, pre-baked at 105 ° C., and then exposed at 100 mJ / cm ² , and then mixed with NaOH (sodium hydroxide) and Na ₂ CO ₃ . Positive development was performed with an alkaline aqueous solution. Here, a proximity exposure system (ultra-high pressure mercury lamp) was used for exposure, and a soda glass patterned with Cr was used as a photomask for exposure.
Then, after etching using oxalic acid ((COOH) ₂ ) and exposing the entire positive resist, the positive resist is peeled off with an alkaline aqueous solution in which NaOH and Na ₂ CO ₃ are mixed, as shown in FIG. The jumper wiring 4 was formed with an ITO film.

<3. Formation of first insulating film 5 and second insulating film 11>
First, an insulating material (manufactured by Osaka Organic Chemical Industry, product number: CHIRON-ZA100) was applied on the formed product shown in FIG. 12 by spin coating.
Next, it prebaked at 80 degreeC, the solvent part was removed, and it exposed at 250 mJ / cm < ² > using the proximity exposure system (super-high pressure mercury lamp). Here, as a photomask for exposure, a quartz glass having a pattern made of Cr was used.
_{It was} then developed with an alkaline aqueous solution obtained by mixing Na ₂ CO _3, NaHCO 3.
Then, heat treatment was performed at 235 ° C. for 20 minutes.
In this way, as shown in FIG. 13, the first insulating film 5 on the jumper wiring 4 and the second insulating film 11 on the frame portion 3 were formed simultaneously.
In this process, since the first insulating film 5 and the second insulating film 11 are formed at the same time, the manufacturing process and the manufacturing cost are not increased as compared with the case where they are formed separately.

<4. Formation of metal wiring 6>
First, a Mo layer, an Al layer, and a Mo layer are sequentially formed on a formed product shown in FIG. 13 in a vacuum by a DC magnetron sputtering method, and a Mo / Al / Mo laminate having a three-layer structure is formed. Formed.
Next, a general novolac positive resist is spin-coated, pre-baked at 105 ° C., exposed at 100 mJ / cm ² , and then positively charged with an alkaline aqueous solution in which NaOH and Na ₂ CO ₃ are mixed. Development was performed. Here, a proximity exposure system (ultra-high pressure mercury lamp) was used for exposure, and a soda glass patterned with Cr was used as a photomask for exposure.
Then, etching was performed with a phosphoric acid / nitric acid / water ternary etchant (etching solution), and the positive resist was exposed on the entire surface, and then the positive resist was stripped with a water-soluble alkaline stripping solution containing silicate.
In this way, the metal wiring 6 was formed on the second insulating film 11 as shown in FIG.

<5. Formation of transparent electrodes 7 and 8>
First, an ITO film was formed on the formation shown in FIG. 14 by heat sputtering, in which sputtering was performed while heating at 170 ° C. by a DC magnetron sputtering method.
Next, a general novolac positive resist is spin-coated, pre-baked at 105 ° C., exposed at 100 mJ / cm ² , and then positively charged with an alkaline aqueous solution in which NaOH and Na ₂ CO ₃ are mixed. Development was performed. Here, a proximity exposure system (ultra-high pressure mercury lamp) was used for exposure, and a soda glass patterned with Cr was used as a photomask for exposure.
Then, etching was performed using oxalic acid, and the entire surface of the positive resist was exposed. Then, the positive resist was peeled off with an alkaline aqueous solution in which NaOH and Na ₂ CO ₃ were mixed.
Thus, as shown in FIG. 15, the transparent electrodes 7 and 8 were formed with the ITO film.

<6. Formation of insulating protective film 9>
First, an overcoat material (manufactured by JSR, product number: NN901) was applied on the formed product shown in FIG. 15 by spin coating.
Next, it prebaked at 80 degreeC, the solvent part was removed, and it exposed at 150 mJ / cm < ² > using the proximity exposure system (super-high pressure mercury lamp). Here, as a photomask for exposure, a quartz glass having a pattern made of Cr was used.
_{It was} then developed with an alkaline aqueous solution obtained by mixing Na ₂ CO _3, NaHCO 3.
Then, heat treatment was performed at 225 ° C. × 20 minutes.
Thus, as shown in FIG. 16, the insulating protective film 9 was formed, and the touch panel sensor 1 was manufactured and completed.

<7. About pigment-based resists>
The pigment-based resist 1 used in the above examples is obtained by dispersing a red pigment and a blue pigment in an alkali-soluble resin dissolved in a solvent. Examples of red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. A mixture of CI Pigment Blue 15: 3 at a ratio of 1: 1 was used. The pigment ratio in the solid content is 40 percent. The manufacturing method of alkali-soluble resin and the pigment-type resist 1 is shown below.

[Synthesis of alkali-soluble resin]
800 parts of 1-methoxy-2-propyl acetate was placed in a reaction vessel, heated while injecting nitrogen gas into the vessel, and a mixture of the following monomer and thermal polymerization initiator was added dropwise to carry out a polymerization reaction.
Styrene 40 parts Methacrylic acid 60 parts Methyl methacrylate 55 parts Benzyl methacrylate 45 parts Azobisisobutyronitrile 10 parts 1,4-dimethylmercaptobenzene 3 parts After dripping and heating sufficiently, 1 part of azobisisobutyronitrile What was dissolved in 50 parts of methoxy-2-propyl acetate was added, and the reaction was further continued to obtain an acrylic resin solution.
An acrylic resin solution was prepared by adding 1-methoxy-2-propylacetate to the resin solution so that the solid content was 30% by weight to obtain an alkali-soluble resin solution. The weight average molecular weight of the acrylic resin was about 20,000.

[First pigment-based resist]
A mixture having the following composition was spread and mixed uniformly, then dispersed with a sand mill for 5 hours using glass beads having a diameter of 1 mm, and then filtered with a 5 μm filter to obtain a dispersion of a light shielding agent.
Red pigment: C.I. I. Pigment Red 254
(BASF "ILGER FOR RED B-CF") 30 parts Blue pigment: C.I. I. Pigment Blue 15: 3
(BASF, IRGALITE Blue GBP) 30 parts Dispersant (Ajinomoto Fine Techno "Ajisper PB821") 2 parts Alkali-soluble resin solution 110 parts After that, the mixture of the following composition was stirred and mixed so as to be uniform, 5 μm The first pigment-based resist was obtained by filtering with a filter.
Dispersion 172 parts Alkali-soluble resin solution 68 parts Polyfunctional polymerizable monomer ("Aronix M-400" manufactured by Toa Gosei) 30 parts Photoinitiator ("Irgacure 369" manufactured by Ciba Specialty Chemicals) 15 parts Sensitizer 4 , 4'-bis (diethylamino) benzophenone ("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.) 3 parts Cyclohexanone 112 parts Propylene glycol monomethyl ether acetate 200 parts

  FIG. 17 shows the light transmission characteristics when the frame portion 3-1 is formed to a thickness of 3 μm using this material. As can be seen from FIG. 17, the light transmittance exceeds 80 percent at least at wavelengths of 850 nm to 1000 nm.

<Evaluation method of frame part for touch panel front panel>
[Optical density (OD value) measurement]
On one surface of the glass substrate, a pigment-based resist was applied by spin coating, the solvent was removed with a vacuum dryer, and then the entire surface was exposed to 200 mJ by a proximity exposure method (ultra-high pressure mercury lamp). Then, _Na 2 CO ₃ (sodium carbonate), NaHCO ₃ and developed with an alkaline aqueous solution mixed with (sodium bicarbonate), a heat treatment of 235 ° C × 20 minutes, the optical density (OD value) measurement substrate Produced. The obtained substrate was subjected to optical density (OD value) measurement serving as a light-shielding index using Macbeth D-200II.

[Specific permittivity measurement]
An aluminum conductive film was patterned on one surface of the glass substrate by vapor deposition. A pigment-based resist was applied onto the glass substrate on which the conductive film had been formed by spin coating, the solvent was removed with a vacuum dryer, and then the entire surface was exposed to 200 mJ using a proximity exposure method (ultra-high pressure mercury lamp). Then, _Na 2 CO ₃ (sodium carbonate), NaHCO ₃ and developed with an alkaline aqueous solution mixed with (sodium bicarbonate) was subjected to heat treatment at 235 ° C × 20 minutes. Further, an aluminum conductive film pattern was formed on the colored layer by a vapor deposition method to produce a relative dielectric constant measurement substrate. Using the impedance analyzer 1260 manufactured by Solartron, the relative permittivity of the obtained substrate was measured at a frequency of 100 Hz, 100 KHz, and 1 MHz under conditions of a voltage of 5 V and a temperature of 24 ° C.

[Volume resistivity measurement]
On one surface of the glass substrate, a pigment-based resist was applied by spin coating, the solvent was removed with a vacuum dryer, and then the entire surface was exposed to 200 mJ by a proximity exposure method (ultra-high pressure mercury lamp). Then, _Na 2 CO ₃ (sodium carbonate), and developed with NaHCO ₃ aqueous alkaline solution of a mixture of (sodium bicarbonate), a heat treatment of 235 ° C × 20 minutes, to produce a volume resistivity measurement measurement substrate . The volume resistivity of the obtained coating film was measured with a minute current measuring instrument (“237 type” manufactured by Keithley) under the conditions of a voltage of 5 V and a temperature of 24 ° C. using a double ring electrode method. At this time, when the resistance value was too low to be measured, the resistance value (Loresta MCP-T610 manufactured by Mitsubishi Chemical Analytech Co., Ltd.) was measured using the four deep needle method.

[Energization test]
In order to confirm whether the touch panel sensor manufactured by the present invention has no problem as an electric circuit, an energization test was performed. A touch panel sensor in which an extraction wiring was formed using a photomask having a line and space (L / S) size of 30 μm / 30 μm was produced. Conductivity was confirmed between the connection part of the external circuit of the lead-out wiring of the touch panel sensor and the transparent electrode 7 and the transparent electrode 8 using a tester (Digital Multi Tester MCD-007 manufactured by Ohm Electric Co., Ltd.). As a judgment criterion, a case where conduction was confirmed was rated as ◯, and a case where poor conduction occurred was marked as x.

(Example 2)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 254 and C.I. I. A frame part 3-2 for a touch panel front panel was obtained in the same manner as in Example 1 except that the second pigment-based resist mixed with Pigment Blue 15: 6 at a ratio of 1: 1 was used.
Red pigment: C.I. I. Pigment Red 254
(BASF "ILGER FOR RED B-CF") 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 30 parts

(Example 3)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 177 and C.I. I. A frame part 3-3 for a touch panel front panel was obtained in the same manner as in Example 1 except that the third pigment-based resist 3 in which Pigment Blue 15: 6 was mixed at a ratio of 1: 1 was used.
Red pigment: C.I. I. Pigment Red 177
(BASF “chromoftal red A2B”) 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 30 parts

(Example 4)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 254 and C.I. I. Pigment Blue 15: 6 and C.I. I. A frame part 3-4 for a touch panel front panel was obtained in the same manner as in Example 1 except that the fourth pigment-based resist 4 in which Pigment Violet 23 was mixed at a ratio of 5: 4: 1 was used.
Red pigment: C.I. I. Pigment Red 254
(BASF "ILGER FOR RED B-CF") 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 24 parts Purple pigment: C.I. I. Pigment Violet 23
(Toyo Ink Co., Ltd., LIONOGEN VIOLET R6200) 6 parts

(Example 5)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 254 and C.I. I. Pigment Blue 15: 6, and C.I. I. A frame part 3-5 for a touch panel front panel was obtained in the same manner as in Example 1 except that the fifth pigment-based resist mixed with Pigment Yellow 139 at a ratio of 5: 4: 1 was used.
Red pigment: C.I. I. Pigment Red 254
(BASF "ILGER FOR RED B-CF") 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 24 parts Yellow pigment: C.I. I. Pigment Yellow 139
(BASF, “Pariotor Yellow D1819”) 6 parts

(Example 6)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 177 and C.I. I. Pigment Blue 15: 6, and C.I. I. A frame part 3-6 for a touch panel front panel was obtained in the same manner as in Example 1 except that the sixth pigment-based resist 6 mixed with Pigment Yellow 185 at a ratio of 5: 4: 1 was used.
Red pigment: C.I. I. Pigment Red 177
(BASF “chromoftal red A2B”) 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 24 parts Yellow pigment: C.I. I. Pigment Yellow 185
(BASF, “Pariotor Yellow D1155”) 6 parts

(Example 7)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 177 and C.I. I. Pigment Blue 15: 6, and C.I. I. A frame part 3-7 for a touch panel front panel was obtained in the same manner as in Example 1 except that the seventh pigment-based resist 7 mixed with Pigment Yellow 139 at a ratio of 5: 4: 1 was used.
Red pigment: C.I. I. Pigment Red 177
(BASF “chromoftal red A2B”) 30 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 24 parts Yellow pigment: C.I. I. Pigment Yellow 139
(BASF, “Pariotor Yellow D1819”) 6 parts

(Example 8)
In this example, red pigments and blue pigments include C.I. I. Pigment red 254 and C.I. I. Instead of Pigment Blue 15: 3, C.I. I. Pigment red 177 and C.I. I. Pigment Blue 15: 6 and C.I. I. Pigment yellow 139 and C.I. I. The frame portion 3-8 for the touch panel front panel is the same as in Example 1 except that the eighth pigment-based resist 8 in which the pigment violet 23 is mixed at a ratio of 4: 3.2: 0.8: 2 is used. Got.
Red pigment: C.I. I. Pigment Red 177
("Chromofal red A2B" manufactured by BASF) 24 parts Blue pigment: C.I. I. Pigment Blue 15: 6
(Toyo Ink Co., Ltd., LIONOGEN BLUE 7706) 19.2 parts Yellow pigment: C.I. I. Pigment Yellow 139
(BASF, “Pariotol Yellow D1819”) 4.8 parts Purple Pigment: C.I. I. Pigment Violet 23
(Toyo Ink Co., Ltd., LIONOGEN VIOLET R6200) 12 parts

Example 9
In this example, the frame part 3-9 for the touch panel front panel is obtained in the same manner as in Example 1 except that the method of forming the frame part 3 is changed from the photolithography method using the proximity exposure method to the screen printing method. It was. Below, the formation method of the frame part 3-9 in a present Example is demonstrated.

<8. Formation of frame part 3>
First, on one side of the cover glass 2, a screen printing plate (stainless steel mesh 500) having a desired pattern, a pigment-based screen printing ink that absorbs visible light and transmits infrared rays, and a squeegee are provided. Screen printing with a screen printer (SERIA SSA-PC605IP manufactured by Tokai Seiki Co., Ltd.) under the conditions of a squeegee angle of 70 °, a printing speed of 50 mm / second, a screen printing plate and substrate clearance of 2 mm, and an indentation amount of 1 mm. did. Next, after removing the solvent with a hot plate at 100 ° C. for 100 seconds, heat treatment was performed at 235 ° C. × 20 minutes, and the frame portion 3-9 was formed in the same manner as the frame portion 3 shown in FIG. .

[Ink for screen printing]
A mixture having the following composition was spread and mixed uniformly, then dispersed with a sand mill for 5 hours using glass beads having a diameter of 1 mm, and then filtered with a 5 μm filter to obtain a dispersion of a light shielding agent.
Red pigment: C.I. I. Pigment Red 254
(BASF "ILGER FOR RED B-CF") 30 parts Blue pigment: C.I. I. Pigment Blue 15: 3
(BASF, IRGALITE Blue GBP) 30 parts Dispersant (Ajinomoto Fine Techno Co., Ltd. “Ajisper PB821”) 2 parts Alkali-soluble resin solution 110 parts

[Ninth pigment resist]
Thereafter, a mixture having the following composition was stirred and mixed to be uniform, and then filtered through a 5 μm filter to obtain a ninth pigment-based resist.
172 parts of the above dispersion polyfunctional polymerizable monomer (“Aronix M-400” manufactured by Toa Gosei Co., Ltd.) 50 parts 30 parts of trimethyl-1,3-pentanediol monoisobutyrate

(Comparative Example 1)
As a comparative example for verifying the effect of the present invention, a mixture having the following composition was stirred and mixed so as to be uniform, and then filtered through a 5 μm filter to prepare a carbon-based resist having a pigment concentration of 47%. A frame portion 3-10 was formed in the same manner as the frame portion 3 shown.

[Carbon resist]
Carbon black dispersion (“TPBK-234C” manufactured by Gokoku Color Co., Ltd.) 161 parts Propylene glycol monomethyl ether acetate solution of acid anhydride polycondensate of epoxy acrylate having a fluorene skeleton (resin solid content concentration = 56.1% by mass) , Nippon Steel Chemical Co., Ltd. V259ME) 40 parts Polyfunctional polymerizable monomer (Osaka Organic Industry Co., Ltd. “UADPH80A (molecular weight 764)”) 10 parts Photoinitiator (BASF “Irgacure OXE02”) 0.3 Part Sensitizer 4,4'-bis (diethylamino) benzophenone ("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.) 1.5 parts Cyclohexanone 140 parts Propylene glycol monomethyl ether acetate 140 parts Additive (manufactured by ADEKA Corporation) "Adeka Polyether G-400") 5 parts

  Table 1 shows the actual measured OD value, the value per unit film thickness, the volume resistivity, the measurement result of the relative dielectric constant, and the energization test result in each of the above Examples and Comparative Examples.

  In any of the examples, the measured value of the OD value was 3 or more, and a sufficient light shielding property was obtained. Thus, in order to make the OD value 3 or more, the OD value per 1.0 μm thickness of the pigment-based resist is preferably 1.0 or more, particularly 1.3 or more.

In any of the examples, the volume resistivity is 1 × 10 ⁹ Ω · cm or more, further 1 × 10 ¹² Ω · cm or more, which is a significant improvement over Comparative Example 1 and a short circuit between the metal wiring and the transparent electrode occurs. Not enough insulation could be secured.

  In any of the examples, the relative dielectric constant was 4.1 or 4.0 or less, and the responsiveness of the capacitively coupled touch panel could be secured.

  In FIGS. 17-19, the light transmission characteristic of the frame parts 3-1 to 3-8 in Examples 1-8 is shown. 17 (a) and 17 (b) show Examples 1, 2, and 3 using a pigment resist containing only red and blue pigments. FIG. 18A shows Examples 5, 6, and 7 using pigment resists containing red, blue, and yellow pigments. FIG. 18 (b) shows Example 4 using a pigment resist containing red, blue, and purple pigments and Example 8 using a pigment resist containing red, blue, yellow, and purple pigments. . FIG. 19 shows Example 7 using a pigment resist containing red, blue and yellow pigments and Example 8 using a pigment resist containing red, blue, yellow and purple pigments.

  In either case, the transmittance is 80% or more in the infrared range of wavelength 850 nm to 1000 nm. Further, since the transmissivity is 20% or less, further 10% or less in the visible light range of wavelengths of 400 nm to 750 nm, the frame portion constitutes a pseudo black layer.

  According to FIG. 18B and FIG. 19, in Examples 5, 6, 7, and 8 using a pigment resist containing a yellow pigment, transmission in a wavelength range of 500 nm or less is possible as compared with the other examples. The tendency for the rate to become smaller was confirmed. In addition, although not shown in the drawing on the scale, in Examples 4 and 8 using a pigment resist containing a purple pigment, in the range of visible light centering on a wavelength of 530 to 580 nm as compared with the other examples. It was confirmed that the transmittance of was smaller.

  In each of the above-described embodiments, the touch panel sensor 1 in which the metal wiring 6 and the transparent electrodes 7 and 8 are disposed and the liquid crystal panel 21 in which the color filter 24 is disposed are attached and integrated. The front plate of the present invention is an on-cell type in which the metal wiring and the transparent electrode are arranged on one surface of the glass and the color filter 24 is arranged on the other surface, and the touch panel sensor and the liquid crystal panel are integrated. It can also be applied to.

  The present invention can be used as a position input device for an electronic device such as a mobile phone or a portable information terminal.

DESCRIPTION OF SYMBOLS 1 Touch panel sensor 2,102 Cover glass 3,103 Frame part 4 Jumper wiring 5 1st insulating film 6 Metal wiring 7, 8 Transparent electrode 9 Insulating protective film 10, 110 Display area 11 2nd insulating film 21 Liquid crystal panel 22, 27 Polarizing Plate 23 Front Glass 24 Color Filter 25 Liquid Crystal / Electrode / TFT Layer 26 Rear Glass 28 Spacer 29 Air Gap Layer 31 Touch Sensor Glass 140 Infrared Communication Window 141 Infrared Transmission Film 150 Proximity Sensor Window

Claims (21)

A front panel for a capacitive touch panel used for a touch panel,
The front plate is provided with a frame portion that is formed on a peripheral portion on one surface thereof and divides a display area of a predetermined shape,
The front plate is made of a transparent material,
The front panel for a capacitive touch panel, wherein the frame part is a pseudo black layer containing a mixture of two or more kinds of pigments and having a light transmittance of a wavelength of 400 nm to a wavelength of 750 nm of 20% or less. A front panel for a capacitive touch panel used for a touch panel,
The front plate is provided with a frame portion that is formed on a peripheral portion on one surface thereof and divides a display area of a predetermined shape,
The front plate is made of a transparent material,
The front panel for a capacitive touch panel, wherein the frame portion is made of a material that transmits infrared rays.   The capacitive touch panel front plate according to claim 2, wherein an average light transmittance in a wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more.   4. The capacitive touch panel front panel according to claim 3, wherein the frame portion includes at least red and blue or red, blue and yellow pigments. 5.   The capacitive touch panel front plate according to claim 1, wherein an optical density (OD value) of the frame portion is 3 or more. The volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more, and the relative dielectric constant is 10 or less. Capacitive touch panel front panel.   The capacitive touch panel front plate according to claim 1, wherein the frame portion is formed by a photolithography method or a screen printing method.   The capacitive touch panel front plate according to any one of claims 1 to 7, wherein a cut surface of the frame portion by a surface orthogonal to the front plate has a forward tapered shape. A display device,
A display panel having a pixel region in which a plurality of pixels are arranged in a matrix, and forming pixels in the pixel region based on an input signal;
A touch panel sensor attached to cover the pixel region;
A display device comprising: the capacitive touch panel front plate according to claim 1. The display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays,
The display device according to claim 9, wherein the infrared reception or / and transmission unit is provided below a region having a frame portion formed on the front plate. An integrated sensor board with a front panel and a capacitive touch panel sensor,
A transparent front plate,
A frame portion that is formed on a peripheral portion on one surface of the front plate and divides a display area of a predetermined shape;
A sensor layer laminated on the one surface of the front plate and the frame portion, and integrated with the front plate;
The sensor layer includes a first transparent electrode and a second transparent electrode that are insulated from each other,
The integrated sensor substrate, wherein the frame portion is a pseudo black layer containing a mixture of two or more pigments and having a light transmittance of 20% or less at a wavelength of 400 nm to 750 nm. An integrated sensor board with a front panel and a capacitive touch panel sensor,
A transparent front plate,
A frame portion that is formed on a peripheral portion on one surface of the front plate and divides a display area of a predetermined shape;
A sensor layer laminated on the one surface of the front plate and the frame portion, and integrated with the front plate;
The sensor layer includes a first transparent electrode and a second transparent electrode that are insulated from each other,
The integrated sensor substrate, wherein the frame portion is made of a material that transmits infrared rays.   The integrated sensor substrate according to claim 12, wherein an average light transmittance in a wavelength range of 850 nm to 1000 nm of the frame portion is 80% or more.   The integrated sensor substrate according to claim 13, wherein the frame portion includes at least a red and blue pigment, or a red, blue and yellow pigment.   The integrated sensor substrate according to claim 11, wherein an optical density (OD value) of the frame portion is 3 or more. 16. The volume resistivity of the material constituting the frame portion is 1.0 × 10 ⁹ Ω · cm or more, and the relative dielectric constant is 10 or less. Integrated sensor board.   17. The integrated sensor substrate according to claim 16, wherein the metal wiring connected to the sensor layer is directly formed on the surface of the frame portion.   18. The integrated sensor substrate according to claim 11, wherein the frame portion is formed by a photolithography method or a screen printing method.   The integrated sensor substrate according to claim 11, wherein a cut surface of the frame portion by a surface orthogonal to the front plate has a forward tapered shape. A display device,
A display panel having a pixel region in which a plurality of pixels are arranged in a matrix, and forming pixels in the pixel region based on an input signal;
A display device comprising: the integrated sensor substrate according to claim 11, which is attached so as to cover the pixel region. The display device includes an infrared reception or / and transmission unit that receives or / and transmits infrared rays,
21. The display device according to claim 20, wherein the infrared receiving and / or transmitting unit is provided below a region having a frame portion formed on the front plate.