WO2011105221A1 - Operating device - Google Patents

Operating device Download PDF

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Publication number
WO2011105221A1
WO2011105221A1 PCT/JP2011/052817 JP2011052817W WO2011105221A1 WO 2011105221 A1 WO2011105221 A1 WO 2011105221A1 JP 2011052817 W JP2011052817 W JP 2011052817W WO 2011105221 A1 WO2011105221 A1 WO 2011105221A1
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WO
WIPO (PCT)
Prior art keywords
layer
light
polarized light
color correction
color
Prior art date
Application number
PCT/JP2011/052817
Other languages
French (fr)
Japanese (ja)
Inventor
好史 舛本
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Priority to JP2012501732A priority Critical patent/JPWO2011105221A1/en
Priority to CN2011900003512U priority patent/CN202795286U/en
Publication of WO2011105221A1 publication Critical patent/WO2011105221A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n

Definitions

  • the present invention relates to an operating device capable of transmitting display light emitted from a liquid crystal panel or the like, and in particular, can improve the function of preventing reflection of external light and correct a change in color due to transmission of display light
  • the operating device which can be
  • a translucent operation panel is installed on the surface of a display panel such as a liquid crystal display panel.
  • the operation panel is a touch panel in which translucent conductive layers having a predetermined resistance value face each other with an air gap therebetween, and when the conductive layers come in contact with each other by a pressing operation force, the contact position can be detected by a change in resistance.
  • the translucent electrodes facing each other face each other and a conductor such as a finger approaches, the capacitance formed between the electrode and the finger is detected to correspond to the operation position. It is a capacitive touch panel that can generate a signal.
  • the touch panels described in Patent Document 1 and Patent Document 2 below are provided with a ⁇ / 4 retardation film and a polarizing film inside the layer structure, and convert light from the outside into linearly polarized light and circularly polarized light.
  • the external light reflected inside the touch panel can be prevented from transmitting through the touch panel and returning again.
  • the polarizing film is formed by adsorbing iodine or a dye to PVA (polyvinyl alcohol) and stretching it in one direction, the polarizing film itself has a yellowish hue. Therefore, when the display light emitted from the display panel is transmitted through the polarizing film, the chromaticity represented by the hue and the saturation is changed, and the display quality is easily deteriorated.
  • PVA polyvinyl alcohol
  • the touch panel described in Patent Document 3 below is provided with a ⁇ / 4 wavelength plate and a polarizing plate so that reflection of light from the outside can be prevented, and the refractive index differs inside the layer structure.
  • a multilayer film having three or more layers is provided, and the multilayer film is intended to offset the influence of the yellowness of the polarizing plate on the display light of the liquid crystal panel.
  • JP 2000-105669 A JP, 2001-142644, A JP 2001-324707 A
  • the peak wavelength of color temperature is set to 550 nm or less by providing a multilayer film of three or more layers having different refractive indexes inside, and the peak wavelength of the touch panel is adjusted in a bluish direction By doing this, it is intended to offset the influence of the yellowing of the polarizing plate.
  • the peak wavelength of the color temperature of the multilayer film must be set in a range that can cancel the yellowing of the actual polarizing plate, such setting is difficult, and it is difficult to efficiently cancel the yellowing of the polarizing plate .
  • the hue can be adjusted, the adjustment of the saturation and the like is substantially impossible.
  • the peak wavelength of the touch panel is adjusted in a bluish direction, the transmittance of light with a wavelength greater than 550 nm will decrease, and the brightness and brightness of the display content of the liquid crystal panel will tend to decrease, and the display quality will decrease. It becomes easy to do.
  • the present invention solves the above-mentioned conventional problems, and for example, by using a color correction layer containing a pigment or a dye, the change in display color influenced by the polarizing layer etc. can be both its hue and saturation. It is an object of the present invention to provide an operating device that can be adjusted in
  • Another object of the present invention is to provide an operating device having a structure that is unlikely to be affected even if light transmitted through the inside of the color correction layer is irregularly reflected or diffused when the color correction layer is used. .
  • a color correction layer for correcting the color of display light transmitted from the substrate to the polarizing layer is disposed on the polarizing layer.
  • the color correction layer contains a pigment or a dye.
  • the operation device of the present invention has the ⁇ / 4 retardation layer and the polarization layer inside, so that it is possible to prevent reflection of incident light from the outside by using linearly polarized light and circularly polarized light. Further, since the change in color due to the presence of the polarizing layer or the like is corrected by the color correction layer, it is possible to correct the chromaticity by adjusting both the hue and the saturation.
  • the color correction layer contains a pigment or a dye, light is likely to be diffusely reflected or diffused therein, and is likely to affect linearly polarized light or circularly polarized light. Therefore, by disposing the color correction layer above the upper polarization layer, the diffuse reflection or diffusion of the color correction layer does not affect the linear polarization and the circular polarization of the display light, and reflection of external light The prevention function is not adversely affected.
  • the detection unit has a gap portion interposed between the lower conductive layer and the upper conductive layer, and the upper conductive layer and the lower conductive layer have an operating force from the outside. It is particularly effective in those in which a detection output can be obtained upon contact.
  • the detection unit having an air gap inside is likely to reflect light from the outside, but by providing a ⁇ / 4 retardation layer and a polarization layer, light from the outside is reflected at the boundary between the air gap and the lower conductive layer Even then, it is possible to prevent the reflected light from returning.
  • the present invention can be practiced even in the case of a layer structure having no air gap inside such as a capacitive type panel. Also in this case, it is easy to prevent the reflection of light by the layer boundary inside the panel.
  • the detection unit may be a switch panel in which the lower conductive layer and the upper conductive layer are in contact with each other to switch ON / OFF.
  • the present invention can be configured such that the substrate is disposed on a display panel that outputs linearly polarized display light, and the direction of polarization of the display light matches the direction of the transmission axis of the polarizing layer. .
  • a translucent cover layer operated from the outside is provided further on the color correction layer, and the color correction layer is an adhesive layer or an adhesive layer containing the pigment or the dye. It is preferable that the polarizing layer and the cover layer be bonded with the color correction layer interposed therebetween.
  • the layer structure of the operation device can be reduced, and it is easy to realize thinning.
  • the cover layer may be provided with a colored layer on a part thereof.
  • the color design of the cover layer coloring layer is determined as a standard color regardless of the color correction. Will be able to
  • the operating device of the present invention can easily prevent the reflection of external light by using linearly polarized light and circularly polarized light. In addition, it is possible to correct the change in the chromaticity of display light due to the presence of a polarizing layer or the like in both the hue and saturation elements. Moreover, the influence of diffuse reflection inside the color correction layer can also be suppressed.
  • FIG. 1 An exploded perspective view of a portable device on which the operation device according to the embodiment of the present invention is mounted; Sectional drawing which shows the operating device of embodiment of this invention, Sectional drawing which shows the operating device of the comparative example 1. Sectional drawing which shows the operating device of the comparative example 2. Operation explanatory diagram of detection unit,
  • the mobile device 1 shown in FIG. 1 is used as a mobile phone, a portable information processing device, a portable storage device, a portable game device or the like.
  • the portable device 1 has a case 2 made of synthetic resin.
  • the case 2 has a recess 3 whose upper side is open, and a circuit board on which an electronic circuit is mounted is accommodated in the recess 3. Further, the liquid crystal display panel 30 is housed inside the recess 3. The opening of the recess 3 is closed by an operation panel 10 which is an embodiment of the operation device of the present invention.
  • liquid crystal display panel 30 and the operation panel 10 are illustrated as being vertically separated in the cross-sectional view of FIG. 2, in the case 2, the liquid crystal display panel 30 and the operation panel 10 are in close contact with each other. .
  • the liquid crystal display panel 30 has a light guide substrate 31 at the lower part.
  • the light guide substrate 31 is formed of a transparent translucent resin.
  • the translucent resin is, for example, PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer) or the like.
  • a light source such as an LED is provided inside the case 2, and the light guide substrate 31 and the light source constitute a backlight device. The light emitted from the light source is guided to the inside of the light guide substrate 31, diffusedly reflected by the bottom of the light guide substrate 31, etc., and directed upward.
  • Translucency in the present specification means a state capable of transmitting light, such as transparent or semitransparent, and means that the total light transmittance is 50% or more and preferably 80% or more.
  • the polarizing film 32 is disposed on the light guide substrate 31, and the lower electrode substrate 33 is fixed thereon.
  • the light guide substrate 31 and the polarizing film 32 are fixed via the light transmitting adhesive layer, and the polarizing film 32 and the lower electrode substrate 33 are also fixed via the light transmitting adhesive layer.
  • a lower electrode 34 and an alignment film 35 are provided on the upper surface of the lower electrode substrate 33.
  • the upper electrode substrate 36 faces the upper side, and the upper electrode 37 and the alignment film 38 are provided on the downward surface of the upper electrode substrate 36.
  • a spacer is interposed between the lower electrode substrate 33 and the upper electrode substrate 36, and the lower electrode substrate 33 and the upper electrode substrate 36 face each other at a constant distance.
  • the liquid crystal layer 39 is interposed between the lower electrode substrate 33 and the upper electrode substrate 36.
  • the lower electrode substrate 33 and the upper electrode substrate 36 are both translucent, and are formed of a glass plate or a transparent synthetic resin film.
  • the lower electrode 34 and the upper electrode 37 are transparent electrode layers formed of ITO or the like.
  • the lower electrode 34 and the upper electrode 37 both extend in parallel, one extending in the X direction and the other extending in the Y direction.
  • a polarizing film 41 is provided on the upper electrode substrate 36.
  • the upper electrode substrate 36 and the polarizing film 41 are fixed via a transparent adhesive layer.
  • the directions of the absorption axis and the transmission axis of the lower polarizing film 32 and the directions of the absorption axis and the transmission axis of the upper polarizing film 41 are determined in accordance with the twist angle of the liquid crystal layer 36.
  • the upper electrode substrate 36 is a color filter substrate, and color display is performed on the liquid crystal display panel 30 by controlling energization to the pixels at the intersections of the lower electrode 34 and the upper electrode 37.
  • the light emitted from the light guide substrate 31 of the backlight device is transmitted through the liquid crystal display panel 30, so that display light of color display and linearly polarized light is emitted upward.
  • the operation panel 10 has a support substrate 11.
  • the support substrate 11 is formed of a translucent resin such as PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer) or the like.
  • the support substrate 11 is a glass substrate.
  • the ⁇ / 4 retardation film 13 which is a ⁇ / 4 retardation layer is bonded on the supporting substrate 11 via the light transmitting adhesive layer 12, and the upward surface of the ⁇ / 4 retardation film 13 is A translucent lower conductive layer 14 such as ITO is formed.
  • a ⁇ / 4 retardation film 15 is provided thereon, and a translucent upper conductive layer 16 such as ITO is formed on the downward surface of the ⁇ / 4 retardation film 15.
  • the lower ⁇ / 4 retardation film 13 and the upper ⁇ / 4 retardation film 15 are opposed to each other with a space between the upper and lower adhesive layers 17 interposed between the lower and upper conductive layers 14 as spacers.
  • An air gap 18 is formed between the conductive layer 16 and the conductive layer 16.
  • ⁇ / 4 retardation film In the ⁇ / 4 retardation film, incident light is separated into two orthogonal linear polarization components by birefringence, and a phase shift of 1 ⁇ 4 wavelength is given to the two linear polarization components.
  • the optical axis of the ⁇ / 4 retardation film When the optical axis of the ⁇ / 4 retardation film is disposed at an angle of 45 ° or 135 ° with respect to the transmission axis of the polarizing film, linearly polarized light transmitted through the polarizing film passes through the ⁇ / 4 retardation film. Is converted to circularly polarized light, and this circularly polarized light is converted back to linearly polarized light by passing through the ⁇ / 4 retardation film.
  • a polarizing film 21 which is a polarizing layer is superimposed via a light transmitting adhesive layer 19.
  • the polarizing film 21 provided on the operation panel 10 and the polarizing films 32 and 41 provided on the liquid crystal display panel 30 stretch a film of polyvinyl alcohol (PVA) resin adsorbed with iodine and a dye in one direction, The film is constructed by sandwiching both sides of the film with a protective film of triacetyl acetate (TAC). Although this kind of polarizing films 21 32 and 41 are translucent, the hue is slightly yellowish.
  • PVA polyvinyl alcohol
  • TAC triacetyl acetate
  • the directions of the absorption axis and the transmission axis are the same.
  • a cover sheet 23 which is a cover layer is fixed to the surface of the polarizing film 21 via the color correction layer 22.
  • the color correction layer 22 is an adhesive layer mainly composed of an acrylic adhesive, and the polarizing film 21 and the cover sheet 23 are joined by the color correction layer 22.
  • the color correction layer By using the color correction layer as the adhesive layer, it is possible to add the color correction layer without increasing the number of layers constituting the operation panel 10.
  • the pressure-sensitive adhesive layer and the pressure-sensitive adhesive in the present specification are those capable of fixing two films by their own tack force, and are distinguished from an adhesive or an adhesive layer whose state cures from liquid to solid. However, it is also possible to replace various adhesive layers such as the color correction layer 22 and the adhesive layers 12 and 19 with the adhesive layer.
  • the color correction layer 22 contains a pigment or a dye, and is emitted from the light guide substrate 31 of the backlight device by the color correction layer 22, passes through the liquid crystal display panel 30, and is polarized from the support substrate 11 of the operation panel 10. Deviation of the chromaticity of the display light transmitted through the film 21 is corrected.
  • Deviation of chromaticity by the color correction layer 22 is adjusted by the selection of the type of pigment or dye and the selection of its addition amount.
  • a standard light source is used instead of the backlight having the light guide substrate 31, and standard light is transmitted from the support substrate 11 of the liquid crystal display panel 30 and the operation panel 10 to the polarizing film 21 and transmitted.
  • the measured chromaticity and the chromaticity of the standard color of the standard light source are applied to the chromaticity diagram of the XYZ color system.
  • the hue for correcting the difference between the measured chromaticity and the chromaticity of the standard color is determined on the chromaticity diagram, and the saturation for correcting to the standard color is determined.
  • the hue of the pigment or dye is selected in accordance with the determined hue for correction, and this is added to the color correction layer 22. Further, by changing the amount of the pigment or dye added to the color correction layer 22, the chromaticity including the saturation is corrected.
  • the color correction layer 22 As described above, by constituting the color correction layer 22 as a layer containing a pigment or a dye, the deviation of the chromaticity of the display light having passed through the polarizing film and the other layers is strictly corrected in both the hue and the saturation. It will be possible to
  • the cover sheet 23 is formed of a transparent resin sheet such as polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • a central square area is a display area 10a, and a frame 10b is colored around it.
  • a colored layer 24 corresponding to the frame portion 10 b is formed on the downward surface of the cover sheet 23.
  • the colored layer 24 is formed by means such as printing or painting or sputtering.
  • the display content of the liquid crystal display panel 30 can be viewed through the display area 10 a of the operation panel 10.
  • the frame portion 10 b is decorated by the color of the colored layer 24.
  • FIG. 2 shows a path of color display light emitted from the light guide substrate 31 and transmitted through the liquid crystal display panel 30 and the operation panel 10, and (B) shows a path of outside light entering the operation panel 10 from the outside. Is shown.
  • the illumination light (1) emitted from the light guide substrate 31 passes through the liquid crystal layer 39 of the liquid crystal display panel 30 and the upper electrode substrate 36 which is a color filter substrate. It becomes light.
  • the color display light emitted from the liquid crystal display panel 30 is linearly polarized light (2) transmitted through the two polarizing films 32 and 41.
  • linearly polarized light (2) passes through the lower ⁇ / 4 retardation film 13 to become circularly polarized light (3), and passes through the upper ⁇ / 4 retardation film 15 to pass linearly polarized light (3).
  • the polarizing film 41 on the upper side of the liquid crystal display panel 30 and the polarizing film 21 of the operation panel 10 have the same direction of the transmission axis, so the color display light is given upward as linearly polarized light (5) with little loss.
  • the color display light following the path (A) becomes yellowish by transmitting through the three polarizing films 32, 41 and 21, and the chromaticity shifts from the original color display light by transmitting through the other layers. . As described above, this chromaticity shift is corrected by the color correction layer 22.
  • the color correction layer 22 contains a pigment or dye inside the adhesive, and the hue and saturation of the color display light can be corrected by selecting the type of the pigment or dye and adjusting the addition amount thereof. It is. On the other hand, light transmitted through the color correction layer 22 is likely to be diffusely reflected or diffused therein.
  • the color display light transmitted between the polarizing film 41 of the liquid crystal display panel 30 and the polarizing film 21 of the operation panel 10 is linearly polarized light or circularly polarized light. Therefore, if the color correction layer 22 is between the polarizing film 41 and the polarizing film 21, the polarization is disturbed by diffuse reflection or diffusion of light.
  • the polarized light between the polarizing film 41 and the polarizing film 21 can be diffusely reflected or diffused by the color correction layer. Not to be affected by
  • the color display light has been subjected to color correction when it is transmitted through the color correction layer 22. Therefore, the color display light transmitted through the cover sheet 23 is light of excellent display quality without deviation in chromaticity. Therefore, it is possible to perform color display with high quality and less influence by the reflected light through the display area 10 a of the operation panel 10. Further, in the frame portion 10b, it is possible to express the decoration of the color represented by the colored layer 24 without deviation of the chromaticity.
  • the cover sheet 23 may be mixed with a pigment or a dye to function as a color correction layer.
  • the decorative color of the frame portion 10b is mixed with the color by the pigment or the dye, it is necessary to set the chromaticity of the colored layer 24 constituting the frame portion 10b to be offset with the chromaticity by the pigment or the dye become.
  • the lower conductive layer 14 and the upper conductive layer 16 constituting the detection unit have a predetermined electric resistance.
  • X electrode layers 14a and 14b formed of silver paste or the like having a specific resistance smaller than that of the lower conductive layer 14 are provided at both ends of the lower conductive layer 14 in the X direction.
  • Y electrode layers 16 a and 16 b having a smaller specific resistance than the upper electrode layer 16 are provided.
  • a voltage is applied between the X electrode layer 14a and the X electrode layer 14b, and a voltage is applied between the Y electrode layer 16a and the Y electrode layer 16b at another timing.
  • the upper ⁇ / 4 retardation film 15 to the cover sheet 23 are flexible, and when the surface of the cover sheet 23 is pressed with a finger or the like, the upper conductive layer 16 and the lower conductive layer 14 partially contact with each other. .
  • the contact point is indicated by P in FIG.
  • a voltage corresponding to the resistance value obtained by dividing lower conductive layer 14 in the X direction is detected from Y electrode layers 16a and 16b, and a voltage corresponding to the resistance value obtained by dividing upper conductive layer 16 in the Y direction is the X electrode layer It is detected from 14a and 14b. Thereby, the position of the point P on the XY coordinates is detected.
  • FIG. 3 shows an operation panel 110 of Comparative Example 1
  • FIG. 4 shows an operation panel 210 of Comparative Example 2.
  • the structure of the liquid crystal display panel 30 shown in FIGS. 3 and 4 is the same as that of the liquid crystal display panel 30 shown in FIG.
  • the operation panel 110 of the comparative example 1 and the operation panel 210 of the comparative example 2 the same components as those of the operation panel 10 shown in FIG.
  • the adhesive layer 122 between the polarizing film 21 and the cover sheet 23 does not contain a pigment or a dye, and does not have a function of a color correction layer. Instead, a pigment or dye is mixed into the support substrate 111 of the operation panel 110, and the support substrate 111 has a function as a color correction layer.
  • the adhesive layer 122 between the polarizing film 21 and the cover sheet 23 does not contain a pigment or a dye as in the operation panel 110, and the function of the color correction layer I do not have
  • the support substrate 11 also contains no pigment or dye and does not function as a color correction layer.
  • the adhesive layer 219 between the upper ⁇ / 4 retardation film 15 and the polarizing film 21 contains a pigment or a dye, and this adhesive layer 219 functions as a color correction layer.
  • Table 1 below shows the results of comparing the functions of the operation panel 10 of the embodiment shown in FIG. 2, the operation panel 110 of Comparative Example 1 shown in FIG. 3, and the operation panel 210 of Comparative Example 2 shown in FIG. Is shown.
  • the operation panel 10 and the operation panels 110 and 210 of the comparative example each use a color correction layer containing a pigment or a dye.
  • the color correction layer can basically adjust the chromaticity by adjusting the type and amount of the pigment or dye.
  • the support substrate 111 functioning as a color correction layer is located between the polarizing film 41 and the ⁇ / 4 retardation film 13. Therefore, the polarization state of the color display light linearly polarized by the polarizing film 41 is irregularly reflected or diffused in the support substrate 111. Therefore, disturbance occurs in circularly polarized light passing through the ⁇ / 4 retardation film 13 and linearly polarized light passing through the upper ⁇ / 4 retardation film 15. Therefore, the amount of light passing through the upper polarizing film 21 is reduced, and the contrast of color display is reduced.
  • the adhesive layer 219 functioning as a color correction layer is located between the ⁇ / 4 retardation film 15 on the upper side and the polarizing film 21. Therefore, the linearly polarized light of the color display light transmitted through the upper ⁇ / 4 retardation film 15 is irregularly reflected or diffused, and the amount of light transmitted through the upper polarizing film 21 is reduced, so that the contrast of the color display is lowered.
  • the operation panel 210 of Comparative Example 2 after light from the outside incident on the operation panel 210 through the cover sheet 23 passes through the polarizing film 21 and becomes linearly polarized, an adhesive layer 219 containing a pigment or a dye Diffusely reflected or diffused inside. Furthermore, the circularly polarized light reflected at the boundary between the air gap 18 and the lower conductive layer 14 is irregularly reflected or diffused in the adhesive layer 219 even after passing through the ⁇ / 4 retardation film 15 and becoming linearly polarized light. Ru. Therefore, the component directed to the transmission axis of the polarizing film 21 is included in the linearly polarized light of the reflected light, and the reflection preventing effect of the external light is reduced.
  • control panel 110 shown in FIG. 3 is manufactured compared to the color correction layer 22 in which the adhesive layer contains the pigment or dye as shown in FIG. 2 because the support substrate 111 contains the pigment or dye.
  • the cost is high.
  • Table 1 below the respective defect items of Comparative Example 1 and Comparative Example 2 are indicated by “x” marks.
  • a resistance detection type touch panel in which the lower conductive layer 14 and the upper conductive layer 16 are opposed via the air gap 18 as a detection unit is configured, but the detection unit is pressed from above At this time, the upper conductive layer 16 and the lower conductive layer 14 may be in contact with each other, and the plurality of ON-OFF switches may be arranged.
  • the detection unit may be a capacitive coordinate detection device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Polarising Elements (AREA)
  • Position Input By Displaying (AREA)

Abstract

Provided is an operating device capable of preventing internal reflection of light from the exterior, and even correcting displacement of chrominance of display light from a display panel. Linearly polarized light (2) from a liquid crystal display panel (30) is converted to circular polarized light (3) at a λ/4 phase difference film (13), converted to linearly polarized light (4) at a λ/4 phase difference film (15) of an upper side, and is transmitted through a polarizing film (21). Light entering from the exterior is converted to circular polarized light (8) at the λ/4 phase difference film (15) of the upper side, is reflected at a lower portion conducting layer (14), whereupon the direction of rotation of the circular polarized light is reversed, and passes through theλ/4 phase difference film (15) of the upper side to become linear polarized light (10). The optical axis of the linear polarized light (10) is perpendicular to the transmission axis of the polarizing film (21), whereby the linear polarized light (10) is prevented from returning to the exterior. A color correction layer (22) including a pigment or a dye on a side more external than the polarizing film (21) is provided. By selecting the pigment or dye and adjusting the amount thereof, even if the color displayed light is affected by the polarizing film, it is possible to correct the chrominance thereof.

Description

操作装置Operating device
　本発明は、液晶パネルなどから発せられる表示光を透過できる操作装置に係り、特に、外光の反射の防止機能を高めることができ、且つ表示光が各層を透過することによる色の変化を補正することができる操作装置に関する。 The present invention relates to an operating device capable of transmitting display light emitted from a liquid crystal panel or the like, and in particular, can improve the function of preventing reflection of external light and correct a change in color due to transmission of display light The operating device which can be
　携帯用機器などの各種電子機器は、液晶表示パネルなどの表示パネルの表面に透光性の操作パネルが設置されている。操作パネルは、所定の抵抗値を有する透光性の導電層が空隙を空けて対向し、押圧操作力で導電層どうしが接触したときにその接触位置を抵抗の変化によって検知できるタッチパネルである。あるいは、互いに交叉する向きの透光性の電極が対向し、指などの導電体が接近したときに、電極と指との間に形成される静電容量を検知して、操作位置に対応した信号を生成できる静電容量型のタッチパネルである。 In various electronic devices such as portable devices, a translucent operation panel is installed on the surface of a display panel such as a liquid crystal display panel. The operation panel is a touch panel in which translucent conductive layers having a predetermined resistance value face each other with an air gap therebetween, and when the conductive layers come in contact with each other by a pressing operation force, the contact position can be detected by a change in resistance. Alternatively, when the translucent electrodes facing each other face each other and a conductor such as a finger approaches, the capacitance formed between the electrode and the finger is detected to correspond to the operation position. It is a capacitive touch panel that can generate a signal.
　この種の操作パネルは、外部の光が前記操作パネルの内部の層の境界部などで反射されやすく、液晶パネルの表示内容が見にくくなる問題がある。特に、抵抗式のタッチパネルのように内部に空隙が介在していると、空隙と電極との境界部において光が反射しやすく、外部の光が強いときや、使用者の背部に光源が存在しているときなどに表示内容が非常に見にくくなる。 In this type of operation panel, there is a problem that external light is easily reflected at the boundary between layers inside the operation panel and the like, and the display content of the liquid crystal panel becomes difficult to see. In particular, when an air gap intervenes inside as in a resistive touch panel, light is easily reflected at the boundary between the air gap and the electrode, and when the external light is strong, a light source is present at the back of the user. The display contents become very hard to see when
　以下の特許文献１と特許文献２に記載されているタッチパネルは、層構造の内部にλ／４位相差フィルムと偏光フィルムが設けられ、外部からの光を直線偏光と円偏光に変換することで、タッチパネルの内部で反射される外光が再びタッチパネルを透過して戻るのを防止できるようにしている。 The touch panels described in Patent Document 1 and Patent Document 2 below are provided with a λ / 4 retardation film and a polarizing film inside the layer structure, and convert light from the outside into linearly polarized light and circularly polarized light. The external light reflected inside the touch panel can be prevented from transmitting through the touch panel and returning again.
　しかし、偏光フィルムは、ＰＶＡ（ポリビニルアルコール）にヨウ素や染料などを吸着させ一方向へ延伸させて形成するものであるため、それ自体が黄色がかった色相を有する。そのため、表示パネルから発せられる表示光が、偏光フィルムを透過することで、色相と彩度で表される色度が変化し、表示品質が低下しやすくなる。 However, since the polarizing film is formed by adsorbing iodine or a dye to PVA (polyvinyl alcohol) and stretching it in one direction, the polarizing film itself has a yellowish hue. Therefore, when the display light emitted from the display panel is transmitted through the polarizing film, the chromaticity represented by the hue and the saturation is changed, and the display quality is easily deteriorated.
　以下の特許文献３に記載されたタッチパネルは、λ／４波長板と偏光板が設けられて、外部からの光の反射を防止できるようにしているとともに、層構造の内部に、屈折率の異なる３層以上の多層膜が設けられ、この多層膜によって、偏光板の黄色みが液晶パネルの表示光に与える影響を相殺しようとしている。 The touch panel described in Patent Document 3 below is provided with a λ / 4 wavelength plate and a polarizing plate so that reflection of light from the outside can be prevented, and the refractive index differs inside the layer structure. A multilayer film having three or more layers is provided, and the multilayer film is intended to offset the influence of the yellowness of the polarizing plate on the display light of the liquid crystal panel.
特開２０００－１０５６６９号公報JP 2000-105669 A 特開２００１－１４２６４４号公報JP, 2001-142644, A 特開２００１－３２４７０７号公報JP 2001-324707 A
　特許文献３に記載されているタッチパネルは、内部に屈折率の異なる３層以上の多層膜を設けることにより、色温度のピーク波長を５５０ｎｍ以下に設定し、タッチパネルのピーク波長を青みがかる方向へ調整することで、偏光板の黄ばみの影響を相殺しようというものである。 In the touch panel described in Patent Document 3, the peak wavelength of color temperature is set to 550 nm or less by providing a multilayer film of three or more layers having different refractive indexes inside, and the peak wavelength of the touch panel is adjusted in a bluish direction By doing this, it is intended to offset the influence of the yellowing of the polarizing plate.
　しかし、多層膜は、各膜の屈性率と膜厚を厳格に管理して成膜することが必要であり、製造工程が複雑でコストの高いものとなる。また、多層膜の色温度のピーク波長を、実際の偏光板の黄ばみを相殺できる範囲に設定しなくてならないが、このような設定は難しく、偏光板の黄ばみを効率よく打ち消すのは困難である。また、多層膜では、色相の調整ができるとしても彩度などの調整は実質的に不可能である。さらに、タッチパネルのピーク波長を青みがかる方向へ調整すると、５５０ｎｍよりも大きい波長の光の透過率が低下することになり、液晶パネルの表示内容の輝度や明度が低下しやすくなり、表示品質が低下しやすくなる。 However, it is necessary to form a multilayer film by strictly controlling the refractive index and film thickness of each film, which makes the manufacturing process complicated and expensive. In addition, although the peak wavelength of the color temperature of the multilayer film must be set in a range that can cancel the yellowing of the actual polarizing plate, such setting is difficult, and it is difficult to efficiently cancel the yellowing of the polarizing plate . Further, in the multilayer film, although the hue can be adjusted, the adjustment of the saturation and the like is substantially impossible. Furthermore, if the peak wavelength of the touch panel is adjusted in a bluish direction, the transmittance of light with a wavelength greater than 550 nm will decrease, and the brightness and brightness of the display content of the liquid crystal panel will tend to decrease, and the display quality will decrease. It becomes easy to do.
　本発明は上記従来の課題を解決するものであり、例えば顔料または染料を含んだ色補正層を使用することで、偏光層などに影響される表示色の変化を、その色相および彩度の双方において調整することが可能な、操作装置を提供することを目的としている。 The present invention solves the above-mentioned conventional problems, and for example, by using a color correction layer containing a pigment or a dye, the change in display color influenced by the polarizing layer etc. can be both its hue and saturation. It is an object of the present invention to provide an operating device that can be adjusted in
　また、本発明は、色補正層を用いた場合に、色補正層の内部を透過する光が乱反射しまたは拡散しても、その影響を受けにくい構造の操作装置を提供することを目的としている。 Another object of the present invention is to provide an operating device having a structure that is unlikely to be affected even if light transmitted through the inside of the color correction layer is irregularly reflected or diffused when the color correction layer is used. .
　本発明は、透光性の基板上に、λ／４位相差層と、その上に位置する透光性の下部導電層と上部導電層とが対向する検知部と、その上に位置するλ／４位相差層と、その上に位置する偏光層とを有し、
　前記基板から前記偏光層までを透過する表示光の色の補正を行う色補正層が、前記偏光層の上に配置されていることを特徴とするものである。
　例えば、前記色補正層は、顔料または染料を含むものである。 According to the present invention, on a light transmitting substrate, a λ / 4 phase difference layer, a detection unit in which a light transmitting lower conductive layer and a light transmitting lower conductive layer located thereon face each other, and a λ located thereon A quarter retardation layer and a polarizing layer located thereon,
A color correction layer for correcting the color of display light transmitted from the substrate to the polarizing layer is disposed on the polarizing layer.
For example, the color correction layer contains a pigment or a dye.
　本発明の操作装置は、内部にλ／４位相差層と偏光層とを有しているため、直線偏光と円偏光を利用して、外部からの入射光の反射を防止できるようになる。また偏光層などの存在による色の変化を、色補正層で補正しているため、色相および彩度の双方を調整して色度の補正を行うことができる。 The operation device of the present invention has the λ / 4 retardation layer and the polarization layer inside, so that it is possible to prevent reflection of incident light from the outside by using linearly polarized light and circularly polarized light. Further, since the change in color due to the presence of the polarizing layer or the like is corrected by the color correction layer, it is possible to correct the chromaticity by adjusting both the hue and the saturation.
　色補正層は顔料または染料を含むためにその内部で光が乱反射しまたは拡散しやすく、直線偏光や円偏光に影響を与えやすい。そこで、色補正層を、上部の偏光層の上方に配置することで色補正層の乱反射または拡散が、表示光の直線偏光と円偏光に影響を与えることがなく、また外部からの光の反射防止機能にも悪影響を与えないようにしている。 Since the color correction layer contains a pigment or a dye, light is likely to be diffusely reflected or diffused therein, and is likely to affect linearly polarized light or circularly polarized light. Therefore, by disposing the color correction layer above the upper polarization layer, the diffuse reflection or diffusion of the color correction layer does not affect the linear polarization and the circular polarization of the display light, and reflection of external light The prevention function is not adversely affected.
　本発明は、前記検知部は、前記下部導電層と前記上部導電層との間に介在する空隙部を有しており、外部からの操作力で、前記上部導電層と前記下部導電層とが接触して検知出力が得られるものにおいて特に有効である。 In the present invention, the detection unit has a gap portion interposed between the lower conductive layer and the upper conductive layer, and the upper conductive layer and the lower conductive layer have an operating force from the outside. It is particularly effective in those in which a detection output can be obtained upon contact.
　内部に空隙を有する検知部は、外部からの光を反射しやすいが、λ／４位相差層と偏光層とを設けることで、空隙と下部導電層との境界部において外部からの光が反射しても、反射光が戻るのを防止できるようになる。ただし、本発明は、静電容量型パネルなど内部に空隙を有しない層構造であっても実施可能である。この場合もパネルの内部の層境界による光の反射を防止しやすくなる。また、検知部は、下部導電層と上部導電層とが接触してＯＮ－ＯＦＦが切換えられるスイッチパネルであってもよい。 The detection unit having an air gap inside is likely to reflect light from the outside, but by providing a λ / 4 retardation layer and a polarization layer, light from the outside is reflected at the boundary between the air gap and the lower conductive layer Even then, it is possible to prevent the reflected light from returning. However, the present invention can be practiced even in the case of a layer structure having no air gap inside such as a capacitive type panel. Also in this case, it is easy to prevent the reflection of light by the layer boundary inside the panel. Further, the detection unit may be a switch panel in which the lower conductive layer and the upper conductive layer are in contact with each other to switch ON / OFF.
　本発明は、前記基板が、直線偏光の表示光を出力する表示パネルの上に設置され、表示光の偏光の向きと、前記偏光層の透過軸の向きとが一致しているものとして構成できる。 The present invention can be configured such that the substrate is disposed on a display panel that outputs linearly polarized display light, and the direction of polarization of the display light matches the direction of the transmission axis of the polarizing layer. .
　上記のように構成することで、液晶パネルなどのように直線偏光の表示光が発せられる場合に、その表示光が操作装置の各層を透過する際の光の透過効率の低下を防止しやすくなる。 By configuring as described above, when linearly polarized display light is emitted as in a liquid crystal panel or the like, it is easy to prevent a decrease in light transmission efficiency when the display light passes through the layers of the operating device. .
　本発明は、前記色補正層のさらに上に、外部から操作される透光性のカバー層が設けられており、前記色補正層が前記顔料または染料を含む粘着層または接着層であり、前記色補正層を挟んで、前記偏光層と前記カバー層とが接合されているものが好ましい。 In the present invention, a translucent cover layer operated from the outside is provided further on the color correction layer, and the color correction layer is an adhesive layer or an adhesive layer containing the pigment or the dye. It is preferable that the polarizing layer and the cover layer be bonded with the color correction layer interposed therebetween.
　色補正層を粘着層または接着層と兼用することで、操作装置の層構造を少なくでき、薄型化を実現しやすい。 By using the color correction layer also as the adhesive layer or the adhesive layer, the layer structure of the operation device can be reduced, and it is easy to realize thinning.
　また、前記カバー層は、その一部に着色層が設けられているものであってもよい。この場合に、色補正層はカバー層の下に位置し、カバー層に至る表示光は既に色補正されているため、カバー層の着色層の色デザインは、色補正と無関係に標準色として決めることができるようになる。 Further, the cover layer may be provided with a colored layer on a part thereof. In this case, since the color correction layer is located under the cover layer and the display light reaching the cover layer is already color corrected, the color design of the cover layer coloring layer is determined as a standard color regardless of the color correction. Will be able to
　本発明の操作装置は、直線偏光と円偏光を利用することで、外部の光の反射を防止しやすい。また、偏光層などの存在による表示光の色度の変化を色相と彩度の双方の要素において補正することが可能である。しかも、色補正層の内部の乱反射による影響も抑制できるようになる。 The operating device of the present invention can easily prevent the reflection of external light by using linearly polarized light and circularly polarized light. In addition, it is possible to correct the change in the chromaticity of display light due to the presence of a polarizing layer or the like in both the hue and saturation elements. Moreover, the influence of diffuse reflection inside the color correction layer can also be suppressed.
本発明の実施の形態の操作装置が搭載された携帯機器の分解斜視図、An exploded perspective view of a portable device on which the operation device according to the embodiment of the present invention is mounted; 本発明の実施の形態の操作装置を示す断面図、Sectional drawing which shows the operating device of embodiment of this invention, 比較例１の操作装置を示す断面図、Sectional drawing which shows the operating device of the comparative example 1. 比較例２の操作装置を示す断面図、Sectional drawing which shows the operating device of the comparative example 2. 検知部の動作説明図、Operation explanatory diagram of detection unit,
　図１に示す携帯機器１は、携帯電話、携帯用の情報処理装置、携帯用の記憶装置、携帯用のゲーム装置などとして使用される。 The mobile device 1 shown in FIG. 1 is used as a mobile phone, a portable information processing device, a portable storage device, a portable game device or the like.
　携帯機器１は合成樹脂製のケース２を有している。ケース２は上方が開放した凹部３を有しており、凹部３の内部に電子回路を実装した回路基板が収納されている。また凹部３の内部に液晶表示パネル３０が収納されている。凹部３の開口部は、本発明の操作装置の実施の形態である操作パネル１０で塞がれている。 The portable device 1 has a case 2 made of synthetic resin. The case 2 has a recess 3 whose upper side is open, and a circuit board on which an electronic circuit is mounted is accommodated in the recess 3. Further, the liquid crystal display panel 30 is housed inside the recess 3. The opening of the recess 3 is closed by an operation panel 10 which is an embodiment of the operation device of the present invention.
　図２の断面図では、液晶表示パネル３０と操作パネル１０とが上下に離れているように示されているが、ケース２の内部では、液晶表示パネル３０と操作パネル１０とが密着している。 Although the liquid crystal display panel 30 and the operation panel 10 are illustrated as being vertically separated in the cross-sectional view of FIG. 2, in the case 2, the liquid crystal display panel 30 and the operation panel 10 are in close contact with each other. .
　図２に示すように、液晶表示パネル３０は、下部に導光基板３１を有している。導光基板３１は透明な透光性樹脂で形成されている。透光性樹脂は、ＰＭＭＡ（メタクリル酸メチル樹脂）、ＰＣ（ポリカーボネート）、ＣＯＰ（環状オレフィンコポリマー）などである。ケース２の内部にＬＥＤなどの光源が設けられ、導光基板３１と光源とでバックライト装置が構成されている。光源から発せられた光が導光基板３１の内部に導かれ、導光基板３１の底部などで乱反射されて上方に向けられる。 As shown in FIG. 2, the liquid crystal display panel 30 has a light guide substrate 31 at the lower part. The light guide substrate 31 is formed of a transparent translucent resin. The translucent resin is, for example, PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer) or the like. A light source such as an LED is provided inside the case 2, and the light guide substrate 31 and the light source constitute a backlight device. The light emitted from the light source is guided to the inside of the light guide substrate 31, diffusedly reflected by the bottom of the light guide substrate 31, etc., and directed upward.
　本明細書での透光性とは、透明または半透明など光を透過可能な状態を意味しており、全光線透過率が５０％以上で好ましくは８０％以上のものを意味している。 Translucency in the present specification means a state capable of transmitting light, such as transparent or semitransparent, and means that the total light transmittance is 50% or more and preferably 80% or more.
　導光基板３１の上に偏光フィルム３２が設置され、その上に下部電極基板３３が固定されている。導光基板３１と偏光フィルム３２は透光性の粘着層を介して固定され、偏光フィルム３２と下部電極基板３３も透光性の粘着層を介して固定されている。下部電極基板３３の上向きの表面に、下部電極３４と配向膜３５が設けられている。さらに上方に上部電極基板３６が対向し、上部電極基板３６の下向きの表面に、上部電極３７と配向膜３８が設けられている。下部電極基板３３と上部電極基板３６との間にスペーサが介在し、下部電極基板３３と上部電極基板３６とが一定の間隔で対向している。そして、下部電極基板３３と上部電極基板３６との間に液晶層３９が介在している。 The polarizing film 32 is disposed on the light guide substrate 31, and the lower electrode substrate 33 is fixed thereon. The light guide substrate 31 and the polarizing film 32 are fixed via the light transmitting adhesive layer, and the polarizing film 32 and the lower electrode substrate 33 are also fixed via the light transmitting adhesive layer. A lower electrode 34 and an alignment film 35 are provided on the upper surface of the lower electrode substrate 33. Further, the upper electrode substrate 36 faces the upper side, and the upper electrode 37 and the alignment film 38 are provided on the downward surface of the upper electrode substrate 36. A spacer is interposed between the lower electrode substrate 33 and the upper electrode substrate 36, and the lower electrode substrate 33 and the upper electrode substrate 36 face each other at a constant distance. The liquid crystal layer 39 is interposed between the lower electrode substrate 33 and the upper electrode substrate 36.
　下部電極基板３３と上部電極基板３６は共に透光性であり、ガラス板または透明な合成樹脂フィルムで形成されている。下部電極３４と上部電極３７はＩＴＯなどで形成された透明電極層である。下部電極３４と上部電極３７は、共に平行に延び、一方がＸ方向に延び他方がＹ方向に延びている。 The lower electrode substrate 33 and the upper electrode substrate 36 are both translucent, and are formed of a glass plate or a transparent synthetic resin film. The lower electrode 34 and the upper electrode 37 are transparent electrode layers formed of ITO or the like. The lower electrode 34 and the upper electrode 37 both extend in parallel, one extending in the X direction and the other extending in the Y direction.
　上部電極基板３６の上に偏光フィルム４１が設けられている。上部電極基板３６と偏光フィルム４１は、透明な粘着層を介して固定されている。下側の偏光フィルム３２の吸収軸および透過軸の向きと、上側の偏光フィルム４１の吸収軸および透過軸の向きは、液晶層３６のツイスト角に応じて決められている。 A polarizing film 41 is provided on the upper electrode substrate 36. The upper electrode substrate 36 and the polarizing film 41 are fixed via a transparent adhesive layer. The directions of the absorption axis and the transmission axis of the lower polarizing film 32 and the directions of the absorption axis and the transmission axis of the upper polarizing film 41 are determined in accordance with the twist angle of the liquid crystal layer 36.
　上部電極基板３６はカラーフィルター基板であり、下部電極３４と上部電極３７の交叉部の画素への通電を制御することで、液晶表示パネル３０でカラー表示が行われる。バックライト装置の導光基板３１から発せられる光が、液晶表示パネル３０を透過することで、カラー表示で且つ直線偏光の表示光が上向きに発せられる。 The upper electrode substrate 36 is a color filter substrate, and color display is performed on the liquid crystal display panel 30 by controlling energization to the pixels at the intersections of the lower electrode 34 and the upper electrode 37. The light emitted from the light guide substrate 31 of the backlight device is transmitted through the liquid crystal display panel 30, so that display light of color display and linearly polarized light is emitted upward.
　操作パネル１０は支持基板１１を有している。支持基板１１は、ＰＭＭＡ（メタクリル酸メチル樹脂）、ＰＣ（ポリカーボネート）、ＣＯＰ（環状オレフィンコポリマー）などの透光性樹脂で形成されている。あるいは、支持基板１１はガラス基板である。支持基板１１の上に透光性の粘着層１２を介してλ／４位相差層であるλ／４位相差フィルム１３が接合されており、λ／４位相差フィルム１３の上向きの表面に、ＩＴＯなどの透光性の下部導電層１４が形成されている。その上方にλ／４位相差フィルム１５が設けられ、λ／４位相差フィルム１５の下向きの表面に、ＩＴＯなどの透光性の上部導電層１６が形成されている。 The operation panel 10 has a support substrate 11. The support substrate 11 is formed of a translucent resin such as PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer) or the like. Alternatively, the support substrate 11 is a glass substrate. The λ / 4 retardation film 13 which is a λ / 4 retardation layer is bonded on the supporting substrate 11 via the light transmitting adhesive layer 12, and the upward surface of the λ / 4 retardation film 13 is A translucent lower conductive layer 14 such as ITO is formed. A λ / 4 retardation film 15 is provided thereon, and a translucent upper conductive layer 16 such as ITO is formed on the downward surface of the λ / 4 retardation film 15.
　下側のλ／４位相差フィルム１３と上側のλ／４位相差フィルム１５は周縁部に介在する接着剤層１７をスペーサとして上下に間隔を空けて対向しており、下部導電層１４と上部導電層１６との間に空隙１８が形成されている。 The lower λ / 4 retardation film 13 and the upper λ / 4 retardation film 15 are opposed to each other with a space between the upper and lower adhesive layers 17 interposed between the lower and upper conductive layers 14 as spacers. An air gap 18 is formed between the conductive layer 16 and the conductive layer 16.
　λ／４位相差フィルムは、入射した光が、複屈折によって、直交する２つの直線偏光成分に分離されるとともに、２つの直線偏光成分に１／４波長の位相ずれが与えられる。λ／４位相差フィルムの光軸を、偏光フィルムの透過軸に対して４５度または１３５度の角度で傾けて配置すると、偏光フィルムを透過した直線偏光が、λ／４位相差フィルムを通過して円偏光に変換され、さらにこの円偏光がλ／４位相差フィルムを通過することで、直線偏光に戻される。 In the λ / 4 retardation film, incident light is separated into two orthogonal linear polarization components by birefringence, and a phase shift of 1⁄4 wavelength is given to the two linear polarization components. When the optical axis of the λ / 4 retardation film is disposed at an angle of 45 ° or 135 ° with respect to the transmission axis of the polarizing film, linearly polarized light transmitted through the polarizing film passes through the λ / 4 retardation film. Is converted to circularly polarized light, and this circularly polarized light is converted back to linearly polarized light by passing through the λ / 4 retardation film.
　図２に示すように、上側のλ／４位相差フィルム１５の上側の表面には、透光性の粘着層１９を介して偏光層である偏光フィルム２１が重ねられている。操作パネル１０に設けられた偏光フィルム２１、および液晶表示パネル３０に設けられた前記偏光フィルム３２，４１は、ヨウ素や染料を吸着させたポリビニルアルコール（ＰＶＡ）樹脂のフィルムを一方向へ延伸し、そのフィルムの両面をトリアセチルアセテート（ＴＡＣ）の保護フィルムで挟むことで構成されている。この種の偏光フィルム２１，３２，４１は、透光性ではあるが色相がやや黄みがかっている。 As shown in FIG. 2, on the upper surface of the λ / 4 retardation film 15 on the upper side, a polarizing film 21 which is a polarizing layer is superimposed via a light transmitting adhesive layer 19. The polarizing film 21 provided on the operation panel 10 and the polarizing films 32 and 41 provided on the liquid crystal display panel 30 stretch a film of polyvinyl alcohol (PVA) resin adsorbed with iodine and a dye in one direction, The film is constructed by sandwiching both sides of the film with a protective film of triacetyl acetate (TAC). Although this kind of polarizing films 21 32 and 41 are translucent, the hue is slightly yellowish.
　操作パネル１０に設けられた偏光フィルム２１と、液晶表示パネル３０の上側に設けられた偏光フィルム４１は、吸収軸と透過軸の向きが同じである。 In the polarizing film 21 provided on the operation panel 10 and the polarizing film 41 provided on the upper side of the liquid crystal display panel 30, the directions of the absorption axis and the transmission axis are the same.
　偏光フィルム２１の表面には、色補正層２２を介してカバー層であるカバーシート２３が固定されている。色補正層２２は、アクリル系の粘着剤を主体とした粘着層であり、色補正層２２によって偏光フィルム２１とカバーシート２３とが接合されている。色補正層を粘着層とすることで、操作パネル１０を構成する層の数を増やすことなく、色補正層を付加することができる。 A cover sheet 23 which is a cover layer is fixed to the surface of the polarizing film 21 via the color correction layer 22. The color correction layer 22 is an adhesive layer mainly composed of an acrylic adhesive, and the polarizing film 21 and the cover sheet 23 are joined by the color correction layer 22. By using the color correction layer as the adhesive layer, it is possible to add the color correction layer without increasing the number of layers constituting the operation panel 10.
　本明細書での粘着層および粘着剤とは、自らのタック力によって２つのフィルムを固着できるものであり、液体から固体にその状態が硬化する接着剤または接着層と区別される。ただし、前記色補正層２２および粘着層１２，１９などの各種粘着層を前記接着層に置き換えることも可能である。 The pressure-sensitive adhesive layer and the pressure-sensitive adhesive in the present specification are those capable of fixing two films by their own tack force, and are distinguished from an adhesive or an adhesive layer whose state cures from liquid to solid. However, it is also possible to replace various adhesive layers such as the color correction layer 22 and the adhesive layers 12 and 19 with the adhesive layer.
　色補正層２２は顔料または染料を含有しており、色補正層２２によって、バックライト装置の導光基板３１から発せられて、液晶表示パネル３０を透過し、操作パネル１０の支持基板１１から偏光フィルム２１までを透過した表示光の色度のずれが補正される。 The color correction layer 22 contains a pigment or a dye, and is emitted from the light guide substrate 31 of the backlight device by the color correction layer 22, passes through the liquid crystal display panel 30, and is polarized from the support substrate 11 of the operation panel 10. Deviation of the chromaticity of the display light transmitted through the film 21 is corrected.
　色補正層２２による色度のずれ補正は、顔料または染料の種類の選択とその添加量の選択によって調整される。 Deviation of chromaticity by the color correction layer 22 is adjusted by the selection of the type of pigment or dye and the selection of its addition amount.
　その調整方法の一例としては、導光基板３１を有するバックライトの代わりに、標準光源を用い、標準光を、液晶表示パネル３０および操作パネル１０の支持基板１１から偏光フィルム２１まで透過させ、透過した光の色度を色度計で測定する。測定された色度と、標準光源の標準色の色度を、ＸＹＺ表色系の色度図に当てはめる。色度図上で、測定された色度と標準色の色度との差を補正するための色相を求め、さらに標準色に補正するための彩度を求める。求められた補正用の色相に応じて顔料または染料の色相を選択し、これを色補正層２２に添加する。また色補正層２２に添加する顔料または染料の量を変化させることにより、彩度を含めた色度の補正を行う。 As an example of the adjustment method, a standard light source is used instead of the backlight having the light guide substrate 31, and standard light is transmitted from the support substrate 11 of the liquid crystal display panel 30 and the operation panel 10 to the polarizing film 21 and transmitted. Measure the chromaticity of the light with a color meter. The measured chromaticity and the chromaticity of the standard color of the standard light source are applied to the chromaticity diagram of the XYZ color system. The hue for correcting the difference between the measured chromaticity and the chromaticity of the standard color is determined on the chromaticity diagram, and the saturation for correcting to the standard color is determined. The hue of the pigment or dye is selected in accordance with the determined hue for correction, and this is added to the color correction layer 22. Further, by changing the amount of the pigment or dye added to the color correction layer 22, the chromaticity including the saturation is corrected.
　このように、色補正層２２を顔料または染料を含んだ層として構成することで、偏光フィルムおよび他の各層を通過した表示光の色度のずれを、色相と彩度の双方において厳密に補正することが可能になる。 As described above, by constituting the color correction layer 22 as a layer containing a pigment or a dye, the deviation of the chromaticity of the display light having passed through the polarizing film and the other layers is strictly corrected in both the hue and the saturation. It will be possible to
　カバーシート２３は、ポリエチレンテレフタレート（ＰＥＴ）などの透明な樹脂シートで形成されている。図１に示すように、操作パネル１０は中央の四角い領域が表示領域１０ａであり、その周りは着色された枠部１０ｂである。図２に示すように、カバーシート２３の下向きの表面に、前記枠部１０ｂに対応する着色層２４が形成されている。着色層２４は、印刷または塗装あるいはスパッタリングなどの手段で形成されている。操作パネル１０の表示領域１０ａを通して液晶表示パネル３０の表示内容を目視することができる。一方、枠部１０ｂは着色層２４の色彩により装飾されている。 The cover sheet 23 is formed of a transparent resin sheet such as polyethylene terephthalate (PET). As shown in FIG. 1, in the operation panel 10, a central square area is a display area 10a, and a frame 10b is colored around it. As shown in FIG. 2, a colored layer 24 corresponding to the frame portion 10 b is formed on the downward surface of the cover sheet 23. The colored layer 24 is formed by means such as printing or painting or sputtering. The display content of the liquid crystal display panel 30 can be viewed through the display area 10 a of the operation panel 10. On the other hand, the frame portion 10 b is decorated by the color of the colored layer 24.
　図２において（Ａ）は、導光基板３１から発せられ、液晶表示パネル３０と操作パネル１０を透過するカラー表示光の経路を示し、（Ｂ）は外部から操作パネル１０に入る外光の経路を示している。 In FIG. 2, (A) shows a path of color display light emitted from the light guide substrate 31 and transmitted through the liquid crystal display panel 30 and the operation panel 10, and (B) shows a path of outside light entering the operation panel 10 from the outside. Is shown.
　カラー表示光の経路（Ａ）では、導光基板３１から発せられた照明光（１）が、液晶表示パネル３０の液晶層３９とカラーフィルター基板である上部電極基板３６を通過することでカラー表示光となる。液晶表示パネル３０を出たカラー表示光は、２つの偏光フィルム３２，４１を透過した直線偏光（２）である。 In the color display light path (A), the illumination light (1) emitted from the light guide substrate 31 passes through the liquid crystal layer 39 of the liquid crystal display panel 30 and the upper electrode substrate 36 which is a color filter substrate. It becomes light. The color display light emitted from the liquid crystal display panel 30 is linearly polarized light (2) transmitted through the two polarizing films 32 and 41.
　操作パネル１０では、直線偏光（２）が下側のλ／４位相差フィルム１３を通過することで円偏光（３）となり、さらに上側のλ／４位相差フィルム１５を通過して直線偏光（４）に戻る。液晶表示パネル３０の上側の偏光フィルム４１と、操作パネル１０の偏光フィルム２１は、透過軸の向きが同じであるため、カラー表示光は損失の少ない直線偏光（５）として上方へ与えられる。 In the operation panel 10, linearly polarized light (2) passes through the lower λ / 4 retardation film 13 to become circularly polarized light (3), and passes through the upper λ / 4 retardation film 15 to pass linearly polarized light (3). Return to 4). The polarizing film 41 on the upper side of the liquid crystal display panel 30 and the polarizing film 21 of the operation panel 10 have the same direction of the transmission axis, so the color display light is given upward as linearly polarized light (5) with little loss.
　外部からの光の経路（Ｂ）では、外光（６）が操作パネル１０に入射すると、偏光フィルム２１を経て直線偏光（７）となり、上側のλ／４位相差フィルム１５を透過して円偏光（８）となる。上側のλ／４位相差フィルム１５と下側のλ／４位相差フィルム１３の間のいずれかの層で円偏光（７）が反射されると、逆回りの円偏光（９）となって戻る。この円偏光（９）は、上側のλ／４位相差フィルム１５を透過して直線偏光（１０）となるが、この直線偏光（１０）の光軸は、偏光フィルム２１の透過軸と９０度相違することになり、反射光は偏光フィルム２１に吸収されて外部に戻ることがなくなる。 In the path (B) of light from the outside, when external light (6) is incident on the operation panel 10, it passes through the polarizing film 21 and becomes linearly polarized light (7), and transmits through the upper λ / 4 retardation film 15 and circles It becomes polarization (8). When circularly polarized light (7) is reflected by any layer between the upper λ / 4 retardation film 15 and the lower λ / 4 retardation film 13, it becomes circularly polarized light (9) in the opposite direction. Return. The circularly polarized light (9) is transmitted through the upper λ / 4 retardation film 15 to be linearly polarized light (10). The optical axis of the linearly polarized light (10) is 90 degrees to the transmission axis of the polarizing film 21. The difference is that the reflected light is absorbed by the polarizing film 21 and does not return to the outside.
　図２に示す操作パネル１０は、外光が空隙１８と下部導電層１４との境界部で反射されやすいが、この反射光が偏光フィルム２１で吸収されるために、外部の光の強度や操作者の背部の景色などに左右されることなく、液晶表示パネル３０のカラー表示光を目視しやすくなる。 In the operation panel 10 shown in FIG. 2, external light is likely to be reflected at the boundary between the air gap 18 and the lower conductive layer 14, but since this reflected light is absorbed by the polarizing film 21, the intensity and operation of external light are It becomes easy to visually observe the color display light of the liquid crystal display panel 30, regardless of the scenery of the person's back and the like.
　経路（Ａ）を辿るカラー表示光は、３つの偏光フィルム３２，４１，２１を透過することで黄みがかり、さらに他の層を透過することで、色度が本来のカラー表示光からシフトする。前述のように、この色度のずれは、色補正層２２で補正される。 The color display light following the path (A) becomes yellowish by transmitting through the three polarizing films 32, 41 and 21, and the chromaticity shifts from the original color display light by transmitting through the other layers. . As described above, this chromaticity shift is corrected by the color correction layer 22.
　色補正層２２は粘着剤の内部に顔料または染料が含有されたものであり、顔料または染料の種別の選択とその添加量を調整することで、カラー表示光の色相と彩度の補正が可能である。その反面、色補正層２２を透過する光は、その内部で乱反射されやすくまたは拡散しやすい。液晶表示パネル３０の偏光フィルム４１と操作パネル１０の偏光フィルム２１との間を透過するカラー表示光は直線偏光または円偏光である。したがって、仮に、色補正層２２が、偏光フィルム４１と偏光フィルム２１との間にあると、光の乱反射や拡散によって偏光が乱される。カラー表示光が、偏光フィルム２１に至る前に偏光状態が乱されると、偏光フィルム２１を透過する光量が減少し、カラー表示光の明度が低下し、表示コントラストが低下する。そこで、図２に示す操作パネル１０では、色補正層２２を、偏光フィルム２１よりも上側に配置することで、偏光フィルム４１と偏光フィルム２１との間の偏光が、色補正層による乱反射や拡散の影響を受けないようにしている。 The color correction layer 22 contains a pigment or dye inside the adhesive, and the hue and saturation of the color display light can be corrected by selecting the type of the pigment or dye and adjusting the addition amount thereof. It is. On the other hand, light transmitted through the color correction layer 22 is likely to be diffusely reflected or diffused therein. The color display light transmitted between the polarizing film 41 of the liquid crystal display panel 30 and the polarizing film 21 of the operation panel 10 is linearly polarized light or circularly polarized light. Therefore, if the color correction layer 22 is between the polarizing film 41 and the polarizing film 21, the polarization is disturbed by diffuse reflection or diffusion of light. If the polarization state of the color display light is disturbed before reaching the polarizing film 21, the amount of light passing through the polarizing film 21 decreases, the brightness of the color display light decreases, and the display contrast decreases. Therefore, in the operation panel 10 shown in FIG. 2, by arranging the color correction layer 22 above the polarizing film 21, the polarized light between the polarizing film 41 and the polarizing film 21 can be diffusely reflected or diffused by the color correction layer. Not to be affected by
　カラー表示光は、色補正層２２を透過した時点で色補正が終わっているため、カバーシート２３を透過するカラー表示光は、色度のずれの無い表示品質の優れた光となっている。よって、操作パネル１０の表示領域１０ａを経て、高品質でさらに反射光による影響の少ないカラー表示を行うことができる。また、枠部１０ｂでは、着色層２４で表される色の装飾を、色度のずれなく表現することが可能である。 The color display light has been subjected to color correction when it is transmitted through the color correction layer 22. Therefore, the color display light transmitted through the cover sheet 23 is light of excellent display quality without deviation in chromaticity. Therefore, it is possible to perform color display with high quality and less influence by the reflected light through the display area 10 a of the operation panel 10. Further, in the frame portion 10b, it is possible to express the decoration of the color represented by the colored layer 24 without deviation of the chromaticity.
　ただし、本発明では、カバーシート２３に顔料または染料を混入させて色補正層として機能させることも可能である。この場合、枠部１０ｂの装飾色が顔料または染料による色と混合するため、枠部１０ｂを構成する着色層２４の色度を、顔料または染料による色度と相殺できるように設定することが必要になる。 However, in the present invention, the cover sheet 23 may be mixed with a pigment or a dye to function as a color correction layer. In this case, since the decorative color of the frame portion 10b is mixed with the color by the pigment or the dye, it is necessary to set the chromaticity of the colored layer 24 constituting the frame portion 10b to be offset with the chromaticity by the pigment or the dye become.
　検知部を構成する下部導電層１４と上部導電層１６は所定の電気抵抗を有している。図５に示すように、下部導電層１４のＸ方向の両端に、下部導電層１４よりも比抵抗が小さい銀ペーストなどで形成されたＸ電極層１４ａ，１４ｂが設けられている。上部電極層１６のＹ方向の両端にも、上部電極層１６よりも比抵抗が小さいＹ電極層１６ａ，１６ｂが設けられている。 The lower conductive layer 14 and the upper conductive layer 16 constituting the detection unit have a predetermined electric resistance. As shown in FIG. 5, X electrode layers 14a and 14b formed of silver paste or the like having a specific resistance smaller than that of the lower conductive layer 14 are provided at both ends of the lower conductive layer 14 in the X direction. At both ends of the upper electrode layer 16 in the Y direction, Y electrode layers 16 a and 16 b having a smaller specific resistance than the upper electrode layer 16 are provided.
　操作パネル１０の動作中は、Ｘ電極層１４ａとＸ電極層１４ｂの間に電圧が印加され、それとは別のタイミングでＹ電極層１６ａとＹ電極層１６ｂの間に電圧が印加される。上側のλ／４位相差フィルム１５からカバーシート２３までは可撓性であり、カバーシート２３の表面が指などで押されると、上部導電層１６と下部導電層１４とが部分的に接触する。図５ではその接触点をＰで示している。このとき、下部導電層１４をＸ方向に分割した抵抗値に対応する電圧がＹ電極層１６ａ，１６ｂから検出され、上部導電層１６をＹ方向に分割した抵抗値に対応する電圧がＸ電極層１４ａ，１４ｂから検出される。これにより、Ｐ点のＸ－Ｙ座標上の位置が検知される。 During operation of the operation panel 10, a voltage is applied between the X electrode layer 14a and the X electrode layer 14b, and a voltage is applied between the Y electrode layer 16a and the Y electrode layer 16b at another timing. The upper λ / 4 retardation film 15 to the cover sheet 23 are flexible, and when the surface of the cover sheet 23 is pressed with a finger or the like, the upper conductive layer 16 and the lower conductive layer 14 partially contact with each other. . The contact point is indicated by P in FIG. At this time, a voltage corresponding to the resistance value obtained by dividing lower conductive layer 14 in the X direction is detected from Y electrode layers 16a and 16b, and a voltage corresponding to the resistance value obtained by dividing upper conductive layer 16 in the Y direction is the X electrode layer It is detected from 14a and 14b. Thereby, the position of the point P on the XY coordinates is detected.
　図３は、比較例１の操作パネル１１０を示し、図４は、比較例２の操作パネル２１０を示している。図３と図４に示されている液晶表示パネル３０の構造は、図２に示す液晶表示パネル３０と同じである。比較例１の操作パネル１１０と比較例２の操作パネル２１０のうち、図２に示す操作パネル１０と同じ構成部分は同じ符号を付して詳しい説明を省略する。 FIG. 3 shows an operation panel 110 of Comparative Example 1, and FIG. 4 shows an operation panel 210 of Comparative Example 2. As shown in FIG. The structure of the liquid crystal display panel 30 shown in FIGS. 3 and 4 is the same as that of the liquid crystal display panel 30 shown in FIG. Of the operation panel 110 of the comparative example 1 and the operation panel 210 of the comparative example 2, the same components as those of the operation panel 10 shown in FIG.
　図３に示す比較例１の操作パネル１１０は、偏光フィルム２１とカバーシート２３との間の粘着層１２２が、顔料または染料を含んでおらず、色補正層の機能を有していない。その代わりに操作パネル１１０の支持基板１１１に顔料または染料が混入され、支持基板１１１が色補正層としての機能を有している。 In the operation panel 110 of Comparative Example 1 shown in FIG. 3, the adhesive layer 122 between the polarizing film 21 and the cover sheet 23 does not contain a pigment or a dye, and does not have a function of a color correction layer. Instead, a pigment or dye is mixed into the support substrate 111 of the operation panel 110, and the support substrate 111 has a function as a color correction layer.
　図４に示す比較例２の操作パネル２１０は、操作パネル１１０と同様に、偏光フィルム２１とカバーシート２３との間の粘着層１２２が、顔料または染料を含んでおらず、色補正層の機能を有していない。また支持基板１１も顔料または染料を含んでおらず、色補正層として機能していない。その代わりに、上側のλ／４位相差フィルム１５と偏光フィルム２１との間の粘着層２１９が顔料または染料を含んでおり、この粘着層２１９が色補正層として機能している。 In the operation panel 210 of Comparative Example 2 shown in FIG. 4, the adhesive layer 122 between the polarizing film 21 and the cover sheet 23 does not contain a pigment or a dye as in the operation panel 110, and the function of the color correction layer I do not have The support substrate 11 also contains no pigment or dye and does not function as a color correction layer. Instead, the adhesive layer 219 between the upper λ / 4 retardation film 15 and the polarizing film 21 contains a pigment or a dye, and this adhesive layer 219 functions as a color correction layer.
　以下の表１には、図２に示す実施の形態の操作パネル１０と、図３に示す比較例１の操作パネル１１０と、図４に示す比較例２の操作パネル２１０の機能を比較した結果を示している。 Table 1 below shows the results of comparing the functions of the operation panel 10 of the embodiment shown in FIG. 2, the operation panel 110 of Comparative Example 1 shown in FIG. 3, and the operation panel 210 of Comparative Example 2 shown in FIG. Is shown.
　操作パネル１０と比較例の操作パネル１１０，２１０は、いずれも顔料または染料を含んだ色補正層を使用している。この色補正層は、顔料または染料の種類とその量を調整することで、基本的に色度の調整が可能である。 The operation panel 10 and the operation panels 110 and 210 of the comparative example each use a color correction layer containing a pigment or a dye. The color correction layer can basically adjust the chromaticity by adjusting the type and amount of the pigment or dye.
　比較例１の操作パネル１１０は、色補正層として機能する支持基板１１１が、偏光フィルム４１とλ／４位相差フィルム１３との間に位置している。そのため、偏光フィルム４１によって直線偏光とされたカラー表示光の偏光状態が支持基板１１１の内部で乱反射されまたは拡散される。そのため、λ／４位相差フィルム１３を経た円偏光および上側のλ／４位相差フィルム１５を通過した直線偏光に乱れが生じる。そのため、上側の偏光フィルム２１を透過する光量が低下し、カラー表示のコントラストが低下する。 In the operation panel 110 of Comparative Example 1, the support substrate 111 functioning as a color correction layer is located between the polarizing film 41 and the λ / 4 retardation film 13. Therefore, the polarization state of the color display light linearly polarized by the polarizing film 41 is irregularly reflected or diffused in the support substrate 111. Therefore, disturbance occurs in circularly polarized light passing through the λ / 4 retardation film 13 and linearly polarized light passing through the upper λ / 4 retardation film 15. Therefore, the amount of light passing through the upper polarizing film 21 is reduced, and the contrast of color display is reduced.
　比較例２の操作パネル２１０は、色補正層として機能する粘着層２１９が、上側のλ／４位相差フィルム１５と偏光フィルム２１との間に位置している。そのため、上側のλ／４位相差フィルム１５を透過したカラー表示光の直線偏光が乱反射されまたは拡散されて、上側の偏光フィルム２１を透過する光量が低下し、カラー表示のコントラストが低下する。 In the operation panel 210 of Comparative Example 2, the adhesive layer 219 functioning as a color correction layer is located between the λ / 4 retardation film 15 on the upper side and the polarizing film 21. Therefore, the linearly polarized light of the color display light transmitted through the upper λ / 4 retardation film 15 is irregularly reflected or diffused, and the amount of light transmitted through the upper polarizing film 21 is reduced, so that the contrast of the color display is lowered.
　さらに、比較例２の操作パネル２１０は、カバーシート２３を経て操作パネル２１０に入射した外部からの光が、偏光フィルム２１を通過して直線偏光になった後に、顔料または染料を含む粘着層２１９の内部で乱反射されまたは拡散される。さらに、空隙１８と下部導電層１４との境界部で反射された円偏光が、λ／４位相差フィルム１５を透過して直線偏光になった後にも、粘着層２１９内で乱反射されまたは拡散される。したがって反射光の直線偏光に、偏光フィルム２１の透過軸に向く成分が含まれるようになり、外光の反射防止効果が低減する。 Furthermore, in the operation panel 210 of Comparative Example 2, after light from the outside incident on the operation panel 210 through the cover sheet 23 passes through the polarizing film 21 and becomes linearly polarized, an adhesive layer 219 containing a pigment or a dye Diffusely reflected or diffused inside. Furthermore, the circularly polarized light reflected at the boundary between the air gap 18 and the lower conductive layer 14 is irregularly reflected or diffused in the adhesive layer 219 even after passing through the λ / 4 retardation film 15 and becoming linearly polarized light. Ru. Therefore, the component directed to the transmission axis of the polarizing film 21 is included in the linearly polarized light of the reflected light, and the reflection preventing effect of the external light is reduced.
　さらに、図３に示す操作パネル１１０は、支持基板１１１に顔料または染料が含まれているため、図２に示すような、粘着層に顔料または染料を含ませた色補正層２２に比べて製造コストが高くなる。
　以下の表１では、比較例１と比較例２のそれぞれの欠点項目を「×」印で示している。 Further, the control panel 110 shown in FIG. 3 is manufactured compared to the color correction layer 22 in which the adhesive layer contains the pigment or dye as shown in FIG. 2 because the support substrate 111 contains the pigment or dye. The cost is high.
In Table 1 below, the respective defect items of Comparative Example 1 and Comparative Example 2 are indicated by “x” marks.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　なお、前記操作パネル１０では、検知部として、下部導電層１４と上部導電層１６とが空隙１８を介して対向する抵抗検知式のタッチパネルが構成されているが、検知部は、上から押されたときに上部導電層１６と下部導電層１４とが接触するＯＮ－ＯＦＦスイッチであり、このＯＮ－ＯＦＦスイッチが複数配列しているものであってもよい。あるいは検知部が、静電容量方式の座標検知装置であってもよい。 In the operation panel 10, a resistance detection type touch panel in which the lower conductive layer 14 and the upper conductive layer 16 are opposed via the air gap 18 as a detection unit is configured, but the detection unit is pressed from above At this time, the upper conductive layer 16 and the lower conductive layer 14 may be in contact with each other, and the plurality of ON-OFF switches may be arranged. Alternatively, the detection unit may be a capacitive coordinate detection device.
１　携帯機器
２　ケース
３　凹部
１０　操作パネル
１０ａ　表示領域
１０ｂ　枠部
１１　支持基板
１２　粘着層
１３，１５　λ／４位相差フィルム
１４　下部導電層
１６　上部導電層
１８　空隙
２１　偏光フィルム
２２　色補正層
２３　カバーシート
２４　着色層
３０　液晶表示パネル
４１　偏光フィルム DESCRIPTION OF SYMBOLS 1 portable device 2 case 3 recessed portion 10 operation panel 10 a display area 10 b frame portion 11 support substrate 12 adhesive layer 13, 15 λ / 4 retardation film 14 lower conductive layer 16 upper conductive layer 18 air gap 21 polarizing film 22 color correction layer 23 cover Sheet 24 Colored layer 30 Liquid crystal display panel 41 Polarized film

Claims (6)

  1. 　透光性の基板上に、λ／４位相差層と、その上に位置する透光性の下部導電層と上部導電層とが対向する検知部と、その上に位置するλ／４位相差層と、その上に位置する偏光層とを有し、
    　前記基板から前記偏光層までを透過する表示光の色の補正を行う色補正層が、前記偏光層の上に配置されていることを特徴とする操作装置。     On a translucent substrate, a λ / 4 retardation layer, a detection portion where the translucent lower conductive layer and the upper conductive layer located thereon face each other, and the λ / 4 retardation located above it A layer and a polarizing layer located thereon,
    A color correction layer for correcting the color of display light transmitted from the substrate to the polarizing layer is disposed on the polarizing layer.
  2. 　前記色補正層は、顔料または染料を含む請求項１記載の操作装置。 The operation device according to claim 1, wherein the color correction layer contains a pigment or a dye.
  3. 　前記検知部は、前記下部導電層と前記上部導電層との間に介在する空隙部を有しており、外部からの操作力で、前記上部導電層と前記下部導電層とが接触して検知出力が得られる請求項１または２記載の操作装置。 The detection unit has a gap portion interposed between the lower conductive layer and the upper conductive layer, and the upper conductive layer and the lower conductive layer are brought into contact with each other by an operation force from the outside and detected. The operating device according to claim 1, wherein an output is obtained.
  4. 　前記基板が、直線偏光の表示光を出力する表示パネルの上に設置され、表示光の偏光の向きと、前記偏光層の透過軸の向きとが一致している請求項１ないし３のいずれかに記載の操作装置。 The said board | substrate is installed on the display panel which outputs the display light of a linearly polarized light, The direction of polarization | polarized-light of display light and direction of the transmission axis of the said polarizing layer correspond. The operating device as described in.
  5. 　前記色補正層のさらに上に、外部から操作される透光性のカバー層が設けられており、前記色補正層が前記顔料または染料を含む粘着層または接着層であり、前記色補正層を挟んで、前記偏光層と前記カバー層とが接合されている請求項１ないし４のいずれかに記載の操作装置。 A transparent cover layer operated from the outside is provided on the color correction layer, and the color correction layer is an adhesive layer or an adhesive layer containing the pigment or dye, and the color correction layer The operating device according to any one of claims 1 to 4, wherein the polarizing layer and the cover layer are bonded to each other.
  6. 　前記カバー層は、その一部に着色層が設けられている請求項５記載の操作装置。 The operating device according to claim 5, wherein the cover layer is provided with a colored layer on a part thereof.
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