JPWO2011105221A1 - Operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating device capable of preventing internal reflection of light from the outside and correcting a chromaticity shift of display light from a display panel. SOLUTION: Linearly polarized light (2) from a liquid crystal display panel 30 is converted into circularly polarized light (3) by a λ / 4 retardation film 13, and linearly polarized light (4) is converted by an upper λ / 4 retardation film 15. And transmitted through the polarizing film 21. Light entering from the outside is converted into circularly polarized light (8) by the upper λ / 4 retardation film 15 and reflected by the lower conductive layer 14 so that the rotational direction of the circularly polarized light is reversed, and the upper λ / 4 phase difference. It becomes linearly polarized light (10) through the film 15. The optical axis of the linearly polarized light (10) is orthogonal to the transmission axis of the polarizing film 21 and is prevented from returning to the outside. A color correction layer 22 containing a pigment or a dye is provided outside the polarizing film 21, and by selecting the pigment or the dye and adjusting the amount thereof, the chromaticity of the color display light is affected even by the influence of the polarizing film. Can be corrected. [Selection] Figure 2

Description

  The present invention relates to an operation 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 corrects a change in color caused by display light passing through each layer. It is related with the operating device which can do.

  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 a translucent conductive layer having a predetermined resistance value is opposed to each other with a gap, and the contact position can be detected by a change in resistance when the conductive layers contact each other with a pressing operation force. Alternatively, translucent electrodes facing each other face each other, and when a conductor such as a finger approaches, the capacitance formed between the electrode and the finger is detected to correspond to the operation position. This is a capacitive touch panel that can generate a signal.

  This type of operation panel has a problem that external light is likely to be reflected at the boundary between layers inside the operation panel, and the display content of the liquid crystal panel is difficult to see. In particular, if there is a gap inside like a resistive touch panel, light is likely to be reflected at the boundary between the gap and the electrode, and there is a light source on the back of the user when the external light is strong. The display content becomes very difficult to see when

  The touch panels described in the following Patent Document 1 and Patent Document 2 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. Thus, it is possible to prevent the external light reflected inside the touch panel from being transmitted again through the touch panel.

  However, since the polarizing film is formed by adsorbing iodine, dye, or the like to PVA (polyvinyl alcohol) and stretching it in one direction, the polarizing film itself has a yellowish hue. Therefore, the display light emitted from the display panel is transmitted through the polarizing film, so that the chromaticity represented by the hue and the saturation changes, and the display quality is likely to deteriorate.

  The touch panel described in Patent Document 3 below is provided with a λ / 4 wavelength plate and a polarizing plate to prevent reflection of light from the outside, and has a different refractive index inside the layer structure. Three or more multilayer films are provided, and the multilayer film tries to offset the influence of yellowing 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 touch panel described in Patent Document 3 is provided with a multilayer film of three or more layers having different refractive indexes, so that the peak wavelength of the color temperature is set to 550 nm or less, and the peak wavelength of the touch panel is adjusted in a bluish direction. By doing so, the effect of the yellowing of the polarizing plate is offset.

  However, the multilayer film needs to be formed by strictly controlling the refractive index and film thickness of each film, and the manufacturing process is complicated and expensive. In addition, the peak wavelength of the color temperature of the multilayer film must be set in a range that can offset the yellowing of the actual polarizing plate, but such setting is difficult, and it is difficult to effectively cancel the yellowing of the polarizing plate. . In the multilayer film, even if the hue can be adjusted, the saturation and the like cannot be adjusted substantially. Furthermore, if the peak wavelength of the touch panel is adjusted in a bluish direction, the transmittance of light having a wavelength greater than 550 nm will decrease, the brightness and brightness of the display content of the liquid crystal panel will tend to decrease, and the display quality will deteriorate. It becomes easy to do.

  The present invention solves the above-described conventional problems. For example, by using a color correction layer containing a pigment or a dye, a change in display color influenced by a polarizing layer or the like can be detected both in hue and saturation. It is an object of the present invention to provide an operating device that can be adjusted.

  Another object of the present invention is to provide an operating device having a structure that is less susceptible to the influence of diffuse reflection or diffusion of light transmitted through the color correction layer when the color correction layer is used. .

In the present invention, a λ / 4 retardation layer, a light-transmitting lower conductive layer positioned on the light-transmitting lower conductive layer and an upper conductive layer are opposed to each other on a light-transmitting substrate, and λ positioned thereon. / 4 retardation layer and a polarizing layer located on the retardation layer,
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 includes a pigment or a dye.

  Since the operating device of the present invention has the λ / 4 retardation layer and the polarizing layer inside, it is possible to prevent reflection of incident light from the outside using linearly polarized light and circularly polarized light. Further, since the color change due to the presence of the polarizing layer or the like is corrected by the color correction layer, the chromaticity can be corrected by adjusting both the hue and the saturation.

  Since the color correction layer contains a pigment or a dye, light is easily diffused or diffused therein, and linearly polarized light and circularly polarized light are easily affected. Therefore, by arranging the color correction layer above the upper polarizing layer, irregular reflection or diffusion of the color correction layer does not affect the linearly polarized light and circularly polarized light of the display light, and the reflection of light from the outside. The prevention function is not adversely affected.

  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 are separated by an operating force from the outside. This is particularly effective when a detection output is obtained by contact.

  A detector with a gap inside easily reflects light from the outside, but by providing a λ / 4 retardation layer and a polarizing layer, light from the outside is reflected at the boundary between the gap and the lower conductive layer. Even so, the reflected light can be prevented from returning. However, the present invention can be practiced even with a layer structure having no voids inside such as a capacitive panel. Also in this case, it becomes easy to prevent 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 be switched on and off.

  The present invention can be configured such that the substrate is installed on a display panel that outputs linearly polarized display light, and the direction of polarization of the display light and the direction of the transmission axis of the polarizing layer coincide with each other. .

  With the above configuration, 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 each layer of the operation device. .

  In the present invention, a light-transmitting cover layer operated from the outside is further provided on the color correction layer, and the color correction layer is an adhesive layer or an adhesive layer containing the pigment or dye, It is preferable that the polarizing layer and the cover layer are bonded with a color correction layer interposed therebetween.

  By using the color correction layer also as the pressure-sensitive adhesive layer or the adhesive layer, the layer structure of the operating device can be reduced and it is easy to realize a reduction in thickness.

  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 has already been color corrected, the color design of the colored layer of the cover 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 reflection of external light by using linearly polarized light and circularly polarized light. In addition, it is possible to correct a change in chromaticity of display light due to the presence of a polarizing layer or the like in both hue and saturation elements. In addition, the influence of irregular reflection inside the color correction layer can be suppressed.

FIG. 3 is an exploded perspective view of a portable device on which the operating 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 the detection unit,

  A portable 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 top is open, and a circuit board on which an electronic circuit is mounted is housed in the recess 3. A liquid crystal display panel 30 is housed in the recess 3. The opening of the recess 3 is closed by an operation panel 10 which is an embodiment of the operating device of the present invention.

  In the cross-sectional view of FIG. 2, the liquid crystal display panel 30 and the operation panel 10 are shown as being separated from each other in the vertical direction, but the liquid crystal display panel 30 and the operation panel 10 are in close contact with each other inside the case 2. .

  As shown in FIG. 2, the liquid crystal display panel 30 has a light guide substrate 31 at the bottom. The light guide substrate 31 is made of a transparent translucent resin. Examples of the translucent resin include PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer), and 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. Light emitted from the light source is guided to the inside of the light guide substrate 31, is irregularly reflected at the bottom of the light guide substrate 31, and directed upward.

  The translucency in this specification means a state capable of transmitting light, such as transparent or translucent, and means that the total light transmittance is 50% or more, preferably 80% or more.

  A polarizing film 32 is installed on the light guide substrate 31, and a lower electrode substrate 33 is fixed thereon. The light guide substrate 31 and the polarizing film 32 are fixed via a translucent adhesive layer, and the polarizing film 32 and the lower electrode substrate 33 are also fixed via a translucent adhesive layer. A lower electrode 34 and an alignment film 35 are provided on the upward surface of the lower electrode substrate 33. Further, the upper electrode substrate 36 faces upward, and an upper electrode 37 and an 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 interval. A liquid crystal layer 39 is interposed between the lower electrode substrate 33 and the upper electrode substrate 36.

  Both the lower electrode substrate 33 and the upper electrode substrate 36 are 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 transmission axis of the lower polarizing film 32 and the directions of the absorption axis and transmission axis of the upper polarizing film 41 are determined according to 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 pixels at the intersection 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 the color display and linearly polarized display light is emitted upward.

  The operation panel 10 has a support substrate 11. The support substrate 11 is made of a light-transmitting resin such as PMMA (methyl methacrylate resin), PC (polycarbonate), COP (cyclic olefin copolymer). Alternatively, the support substrate 11 is a glass substrate. A λ / 4 retardation film 13, which is a λ / 4 retardation layer, is bonded to the support substrate 11 via a light-transmitting adhesive layer 12. On the upward surface of the λ / 4 retardation film 13, A translucent lower conductive layer 14 such as ITO is formed. A λ / 4 retardation film 15 is provided thereabove, and a translucent upper conductive layer 16 such as ITO is formed on the downward surface of the λ / 4 retardation film 15.

  The lower λ / 4 retardation film 13 and the upper λ / 4 retardation film 15 are opposed to each other with the adhesive layer 17 interposed in the peripheral portion as a spacer and spaced apart from each other. A gap 18 is formed between the conductive layer 16 and the conductive layer 16.

  In the λ / 4 retardation film, incident light is separated into two linearly polarized light components orthogonal to each other by birefringence, and a phase shift of ¼ wavelength is given to the two linearly polarized light components. When the optical axis of the λ / 4 retardation film is tilted at an angle of 45 degrees or 135 degrees with respect to the transmission axis of the polarizing film, the linearly polarized light transmitted through the polarizing film passes through the λ / 4 retardation film. The circularly polarized light is converted into circularly polarized light, and the circularly polarized light passes through the λ / 4 retardation film to be returned to linearly polarized light.

  As shown in FIG. 2, a polarizing film 21, which is a polarizing layer, is overlaid on the upper surface of the upper λ / 4 retardation film 15 with a translucent adhesive layer 19 interposed therebetween. 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 are stretched in one direction from a polyvinyl alcohol (PVA) resin film adsorbed with iodine or a dye, The film is constituted by sandwiching both sides of the film with a protective film of triacetyl acetate (TAC). This type of polarizing film 21, 32, 41 is translucent but has a slightly yellow hue.

  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 have the same absorption axis and transmission axis.

  A cover sheet 23, which is a cover layer, is fixed to the surface of the polarizing film 21 via a 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 making the color correction layer an adhesive layer, the color correction layer can be added without increasing the number of layers constituting the operation panel 10.

  The pressure-sensitive adhesive layer and the pressure-sensitive adhesive in this 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 is cured from a liquid to a solid. However, various adhesive layers such as the color correction layer 22 and the adhesive layers 12 and 19 can be replaced with the adhesive layer.

  The color correction layer 22 contains a pigment or 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. The shift in chromaticity of the display light transmitted through the film 21 is corrected.

  The chromaticity deviation correction by the color correction layer 22 is adjusted by selecting the type of pigment or dye and the amount of addition.

  As an example of the adjustment method, a standard light source is used instead of the backlight having the light guide substrate 31, and the standard light is transmitted from the liquid crystal display panel 30 and the support substrate 11 of the operation panel 10 to the polarizing film 21, and transmitted. The chromaticity of the measured light is measured with a chromaticity 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. On the chromaticity diagram, a hue for correcting a difference between the measured chromaticity and the chromaticity of the standard color is obtained, and further, a saturation for correcting the standard color is obtained. The hue of the pigment or dye is selected according to the obtained hue for correction and added to the color correction layer 22. Further, the chromaticity including saturation is corrected by changing the amount of the pigment or dye added to the color correction layer 22.

  In this way, by configuring the color correction layer 22 as a layer containing a pigment or a dye, the chromaticity shift of the display light that has passed through the polarizing film and other layers is strictly corrected in both hue and saturation. It becomes possible to do.

  The cover sheet 23 is formed of a transparent resin sheet such as polyethylene terephthalate (PET). As shown in FIG. 1, the operation panel 10 has a square area at the center as a display area 10a and a colored frame portion 10b 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, painting, or sputtering. The display content of the liquid crystal display panel 30 can be visually observed through the display area 10a of the operation panel 10. On the other hand, the frame portion 10 b is decorated with the color of the colored layer 24.

  2A 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 FIG. 2B shows a path of external light entering the operation panel 10 from the outside. Is shown.

  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, thereby performing color display. It becomes light. The color display light exiting the liquid crystal display panel 30 is linearly polarized light (2) transmitted through the two polarizing films 32 and 41.

  In the operation panel 10, the linearly polarized light (2) passes through the lower λ / 4 retardation film 13 to become circularly polarized light (3), and further passes through the upper λ / 4 retardation film 15 to obtain linearly polarized light ( Return to 4). Since 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, the color display light is given upward as linearly polarized light (5) with little loss.

  In the light path (B) from the outside, when the external light (6) enters the operation panel 10, it becomes linearly polarized light (7) through the polarizing film 21, passes through the upper λ / 4 retardation film 15 and is circular. It becomes polarized light (8). When the 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, the circularly polarized light (9) is reversed. Return. The circularly polarized light (9) passes through the upper λ / 4 retardation film 15 and becomes linearly polarized light (10). The optical axis of the linearly polarized light (10) is 90 degrees with respect to the transmission axis of the polarizing film 21. The reflected light is not absorbed by the polarizing film 21 and returned to the outside.

  In the operation panel 10 shown in FIG. 2, external light is easily reflected at the boundary between the gap 18 and the lower conductive layer 14, but since the reflected light is absorbed by the polarizing film 21, the intensity of external light and operation The color display light of the liquid crystal display panel 30 can be easily viewed without being influenced by the scenery on the back of the person.

  The color display light that follows the path (A) is yellowed by passing through the three polarizing films 32, 41, and 21 and further passes through other layers, so that the chromaticity is shifted from the original color display light. . 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 color display light can be corrected by selecting the type of pigment or dye and adjusting the amount added. It is. On the other hand, the light transmitted through the color correction layer 22 is easily diffused 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 polarized light is disturbed by irregular reflection or diffusion of light. If the polarization state is disturbed before the color display light reaches the polarizing film 21, the amount of light transmitted 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, the color correction layer 22 is disposed above the polarizing film 21 so that the polarized light between the polarizing film 41 and the polarizing film 21 is diffusely reflected or diffused by the color correction layer. To avoid being affected.

  Since the color correction of the color display light is completed when it passes through the color correction layer 22, the color display light that passes through the cover sheet 23 is light with excellent display quality with no chromaticity deviation. Therefore, high-quality color display that is less affected by reflected light can be performed through the display area 10a of the operation panel 10. In the frame portion 10b, the color decoration represented by the colored layer 24 can be expressed without any chromaticity deviation.

  However, in the present invention, a pigment or dye can be mixed in the cover sheet 23 to function as a color correction layer. In this case, since the decorative color of the frame portion 10b is mixed with the color of the pigment or dye, it is necessary to set the chromaticity of the colored layer 24 constituting the frame portion 10b so that it can be offset with the chromaticity of the pigment or dye. become.

  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 14 a and 14 b made of silver paste or the like having a specific resistance lower than that of the lower conductive layer 14 are provided at both ends in the X direction of the lower conductive layer 14. Y electrode layers 16 a and 16 b having a specific resistance smaller than that of the upper electrode layer 16 are also provided at both ends in the Y direction of the upper electrode layer 16.

  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 a different 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 are partially in contact with each other. . In FIG. 5, the contact point is indicated by P. At this time, a voltage corresponding to the resistance value obtained by dividing the lower conductive layer 14 in the X direction is detected from the Y electrode layers 16a and 16b, and a voltage corresponding to the resistance value obtained by dividing the upper conductive layer 16 in the Y direction is detected by the X electrode layer. 14a and 14b. As a result, the position of the point P on the XY coordinates is detected.

  3 shows the operation panel 110 of the first comparative example, and FIG. 4 shows the operation panel 210 of the second comparative example. 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.

  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 dye, and does not have a function of a color correction layer. Instead, 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.

  In the operation panel 210 of Comparative Example 2 shown in FIG. 4, as in the operation panel 110, the adhesive layer 122 between the polarizing film 21 and the cover sheet 23 does not contain a pigment or dye, and functions as a color correction layer. Does not have. Further, the support substrate 11 also does not contain a 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.

  Table 1 below shows the result of comparing the functions of the operation panel 10 of the embodiment shown in FIG. 2, the operation panel 110 of the comparative example 1 shown in FIG. 3, and the operation panel 210 of the comparative example 2 shown in FIG. Is shown.

  The operation panel 10 and the operation panels 110 and 210 of the comparative example both use a color correction layer containing a pigment or a dye. This color correction layer can basically adjust chromaticity by adjusting the type and amount of pigment or dye.

  In the operation panel 110 of Comparative Example 1, a support substrate 111 that functions 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 that has been linearly polarized by the polarizing film 41 is irregularly reflected or diffused inside the support substrate 111. Therefore, the circularly polarized light that has passed through the λ / 4 retardation film 13 and the linearly polarized light that has passed through the upper λ / 4 retardation film 15 are disturbed. For this reason, the amount of light transmitted through the upper polarizing film 21 is reduced, and the contrast of color display is reduced.

  In the operation panel 210 of Comparative Example 2, an adhesive layer 219 functioning as a color correction layer is located between the upper λ / 4 retardation film 15 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, the amount of light transmitted through the upper polarizing film 21 is reduced, and the contrast of the color display is reduced.

  Furthermore, the operation panel 210 of the comparative example 2 has an adhesive layer 219 containing a pigment or a dye after external light incident on the operation panel 210 through the cover sheet 23 passes through the polarizing film 21 and becomes linearly polarized light. Is diffusely reflected or diffused inside. Further, even after the circularly polarized light reflected at the boundary between the gap 18 and the lower conductive layer 14 passes through the λ / 4 retardation film 15 and becomes linearly polarized light, it is irregularly reflected or diffused in the adhesive layer 219. The Accordingly, the linearly polarized light of the reflected light includes a component that is directed to the transmission axis of the polarizing film 21, and the antireflection effect of external light is reduced.

Further, the operation panel 110 shown in FIG. 3 is manufactured in comparison with the color correction layer 22 in which the pigment or dye is included in the adhesive layer as shown in FIG. 2 because the support substrate 111 contains the pigment or dye. Cost increases.
In Table 1 below, the defect items of Comparative Example 1 and Comparative Example 2 are indicated by “x” marks.

  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 to each other through the gap 18 is configured as a detection unit. However, the detection unit is pressed from above. It may be an ON-OFF switch in which the upper conductive layer 16 and the lower conductive layer 14 are in contact with each other, and a plurality of ON-OFF switches may be arranged. Alternatively, the detection unit may be a capacitive coordinate detection device.

DESCRIPTION OF SYMBOLS 1 Mobile device 2 Case 3 Concave part 10 Operation panel 10a Display area 10b Frame part 11 Support substrate 12 Adhesive layer 13, 15 (lambda) / 4 phase difference film 14 Lower conductive layer 16 Upper conductive layer 18 Space | gap 21 Polarizing film 22 Color correction layer 23 Cover Sheet 24 Colored layer 30 Liquid crystal display panel 41 Polarizing film

Claims (6)

On the translucent substrate, a λ / 4 retardation layer, a light-transmitting lower conductive layer and an upper conductive layer located on the λ / 4 retardation layer, and a λ / 4 phase difference located thereon A layer and a polarizing layer located thereon,
An operating device, wherein 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 operating device according to claim 1, wherein the color correction layer includes a pigment or a dye.   The detection unit has a gap portion interposed between the lower conductive layer and the upper conductive layer, and is detected by contact between the upper conductive layer and the lower conductive layer by an external operation force. The operating device according to claim 1, wherein an output is obtained.   The said board | substrate is installed on the display panel which outputs the display light of a linearly polarized light, The direction of the polarization of display light and the direction of the transmission axis of the said polarizing layer correspond. The operating device according to 1.   A translucent 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 is The operating device according to claim 1, wherein the polarizing layer and the cover layer are bonded together.   The operating device according to claim 5, wherein the cover layer is provided with a colored layer at a part thereof.

Images