WO2001040923A1 - Touch panel and information input device using the same - Google Patents

Abstract

A touch panel (3a) having a translucent layer (6) capable of forming an image from a projecting means, wherein the translucent layer (6) has a fine particle dispersion structure which comprises a transparent matrix and a dispersed phase of fine particles. The translucent layer (6) may comprise a transparent matrix resin and a solid component being incompatible with the matrix resin and having an average particle diameter of 0.1 to 20 νm, wherein the amount of the solid component may be about 0.01 to about 5 parts by wt relative to 100 parts by wt of the transparent matrix resin. The difference in refractive index between the solid component and the matrix may be about 0.1 to about 2. The translucent layer (6) may comprise, for example, a poly(vinyl acetal) resin and, dispersed therein, white or colored fine particles. The touch panel can form an image of the light from a projector, and is excellent in the accuracy of a touched position and also in the clarity of a display.

Description

 TECHNICAL FIELD Evening panel and information input device using the same

 The present invention relates to a sunset panel useful for inputting coordinate information of a sunset position, and an information input device using the same. Background art

 The touch panel is generally attached to the front of an image display such as a computer and a mobile device, and is used to input various information. For this purpose, even if the touch panel is transparent, it does not degrade the display image quality, so it is considered high-grade.

 For example, Japanese Utility Model Laid-Open No. 3-29982 discloses that a transmissive liquid crystal display device and a transmissive sunset panel are integrally provided on the front of a projector device in close proximity to the projector device. There is disclosed a device for projecting light transmitted through a display device and a transmission type touch panel to a screen remote from a projector device and a transmission type touch panel. However, with this device, it is difficult for a plurality of persons to touch the same screen.

In order to allow a plurality of people to touch the same screen, such as a game and a public information terminal, for example, as disclosed in Japanese Patent Application Laid-Open No. It is conceivable to use a sunset sensor type screen equipped with a sunset sensor panel and project light from the front side of this screen by means of light projection (overhead projector 1). However, in such an input device, the image forming position (screen surface) and the evening position with respect to the evening panel are different. Parallax (deviation) occurs, making it difficult to accurately set the target position. That is, as shown in FIG. 5, the operator attempts to set a point P1 on the screen 2 on which an image is displayed, but sets an intersection P3 between the operator's line of sight 5 and the surface of the setting panel 3c. It often touches. Then, the input device determines that the position P 2 on the surface of the screen 2 corresponding to the thickness direction of the sunset panel 3 c with respect to the sunset position P 3 has been set, and determines the operator's intention with the input device. Causes deviation. In addition, the number of parts increases, resulting in problems such as increased costs, increased weight, reduced reliability due to more complex mechanisms, and reduced productivity (increased costs).

 Japanese Patent Laid-Open No. 5-28874 discloses a resistive film type switch having a semi-transparent surface member on the surface and a light source set on the back surface of the switch. A configured operating switch device is disclosed. In this device, a light image from a light source can be displayed on a semi-translucent member. However, the sharpness of the image is not always sufficient depending on the type of the semi-light transmissive surface member.

 Accordingly, it is an object of the present invention to provide a sunset panel which is excellent in sunset accuracy and display clarity, and an information input device using the same, even if it is a sunset panel capable of forming an image of light from a projector. . Disclosure of the invention

 The inventors of the present invention have conducted intensive studies to achieve the above-mentioned object. As a result, when a translucent layer formed by dispersing a disperse phase in a transparent matrix resin in a fine particle state is used to form a sunset panel, The inventors have found that light from optical means can be clearly imaged, and completed the present invention.

That is, the evening panel according to the present invention includes a semi-transparent layer capable of forming an image from the light projecting means, and the semi-transparent layer has a fine particle dispersed structure in which a fine dispersed phase is formed in a transparent matrix. have. In the evening touch panel of the present invention, the flow A front substrate and a reinforcing substrate for reinforcing the front substrate may be laminated via the translucent layer. Further, in a touch panel comprising the front substrate, the translucent layer, and the reinforcing substrate, a thickness of about 0.1 to 5 mm is provided between the translucent layer and the front substrate or between the translucent layer and the reinforcing substrate. A transparent layer may be formed. In such a sunset panel, the semi-transparent layer is composed of a transparent matrix resin and a solid component having an average particle size of 0.1 to 20 μm incompatible with the matrix resin. The proportion of the solid component may be about 0.01 to 5 parts by weight based on 100 parts by weight of the transparent matrix resin. The difference in the refractive index between the solid component and the matrix may be about 0.1 to 2. For example, the translucent layer may be composed of a polyvinyl acetal resin in which white fine particles or chromatic fine particles are dispersed. The visible light transmittance of such a translucent layer is about 40 to 75%. Also, the front substrate may be a glass substrate having an acoustic wave attenuation coefficient of 5.5 MHz of 0.5 dB / cm or less, and the reinforcing substrate may be a tempered glass, a laminated glass, an organic glass, or the like. You may.

 The present invention also includes an information input device including the evening panel, a support unit for supporting the evening panel, and a light projecting unit for projecting an image on the evening panel. Transmitting means for transmitting the surface acoustic wave, and receiving means for receiving the surface acoustic wave are disposed on the surface of the sunset panel, and the transmitting means and the receiving means are protected by a protective cover. Covered. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a schematic cross-sectional view showing an example of the evening panel of the present invention.

 FIG. 2 is a schematic perspective view for explaining the information input device of the present invention.

 FIG. 3 is a plan view of the information input device of FIG.

FIG. 4 is a schematic sectional view showing another example of the evening panel of the present invention. FIG. 5 is a schematic sectional view showing an example of a conventional evening panel. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the touch panel and the information input device of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing an example of the evening panel of the present invention, FIG. 2 is a schematic perspective view of an information input device using the evening panel of FIG. 1, and FIG. 3 is a plan view of the information input device. It is.

 The evening touch panel 3a in FIG. 1 is an acoustic wave (ultrasonic) sunset panel composed of a front board 4 for detecting the evening spot position and a reinforcing board 7 for reinforcing the front board 4. It is. In acoustic wave type touch panels, surface acoustic waves (Rayleigh waves, etc.) are transmitted to the front substrate by a transmitting transducer (not shown), and the disturbance of the surface acoustic waves at the position of the touch panel is received by a receiving transducer (see FIG. 1). (Not shown), it is possible to detect the sunset position. Further, a translucent layer 6 in which a dispersed phase is dispersed in a transparent matrix is disposed between the front substrate 4 and the reinforcing substrate 7, and a front substrate 4, a translucent layer 6, and a reinforcing substrate A three-layer structure consisting of 7 is formed. When such a translucent layer 6 is used, light 1 from a light projecting means (such as a projector) can be transmitted appropriately and scattered appropriately, so that an image from the projector 1 can be imaged with good clarity. In addition, since images can be formed directly on the touch panel, parallax can be reduced and accurate touch input can be performed.

The sunset panel is translucent so that images projected from the back can be viewed from the front, so it can be used simultaneously by multiple people as shown in Figures 2 and 3 by combining it with a projector. An information input device can be configured. The information input device 10 shown in FIG. 2 is a table-shaped (in this example, a circular table) information input device, and has the acoustic wave input method (ultrasonic input method) as a tabletop. The touch panel 3 has a structure supported by a plurality of (four in this example) legs 8 (support portions). Then, a projector 1 (light emitting means) 9 for projecting an image on the evening touch panel 3 (top plate) is provided below the evening touch panel 3 (top plate). C If such an information input device is used, Since the device is in the form of a table, multiple people can operate the evening switch panel while visually recognizing the image projected on the tabletop (evening panel).

Also, in the information input device 10, a part of the surface of the evening panel near the leg 8 is provided with a set of transmission transducers (transmission means) for transmitting surface acoustic waves to the front substrate. In the example, the transmitting transducer 1 la transmits the surface acoustic wave in the X-axis direction, the surface acoustic wave transmits 1 1 b) in the y-axis direction, and receives the surface acoustic waves from these transmitting transducers. Receiver transducers (reception means) 12a and 12b for detecting the position of the sunset are provided. Also, in order to reflect the surface acoustic waves from the transmitting transducer toward the receiving transducer, the surface of the front substrate has reflection arrays 14a, 14a extending in the X-axis direction at both ends in the Y-axis direction. b, and reflection array groups 14 c and 14 d extending in the Y-axis direction at both ends in the X-axis direction. The touch position can be detected in the area (area 15) surrounded by the reflection array groups 14a to 14d. That is, the surface acoustic wave transmitted in the X-axis direction from the transmission transducer 11a is reflected in the Y-axis direction by the reflection array group 14a so as to go into the area 15. The surface acoustic waves reflected in the y-axis direction are reflected in the -axis direction by the reflection array group 1413 and received by the receiving transducer 12a. When any point in area 15 (for example, point P 4) is touched, the surface acoustic wave is disturbed. By measuring the time t that the disturbed surface acoustic wave reaches the receiving transducer, , It can measure the sunset position (X coordinate). Similarly, the surface acoustic waves transmitted from the transmitting transducer 11b in the Y-axis direction are reflected by the reflection arrays 14c and 14c. The Y-coordinate of the sunset position can be detected by detecting the light at the receiving transducer 12 b after being reflected at d.

 In the information input device, the transducers 11a, llb, 12a, and 12b, which constitute these acoustic wave transmitting and receiving systems, are connected to these transducers in order to protect them from external shocks and the like. Along with the electric cable 16, it is housed (covered) in a protective cover 13 formed above the leg 8. For this reason, the transducer ゃ cable and the like cannot be visually recognized from the outside, and the beauty of the information input device is not spoiled. The protective cover 13 has an opening (not shown) at a portion corresponding to the transmitting direction and the receiving direction of the surface acoustic wave, and can transmit and receive the surface acoustic wave.

 The information input device does not need to be in the form of a table as long as the image projected from the back of the evening touch panel can be viewed from the front surface and the evening touch can be operated.For example, the window frame using the evening touch panel as a supporting portion may be used. It may be installed on a wall or a wall, and the project is installed on the back, and operated from the front. Further, the protective cover may be provided independently of the support portion, or may be integrated with the support portion. For example, when a window frame is used for the support, the window frame (support) may be used as a protective cover.

 In a sunset panel, the transparent matrix constituting the translucent layer has a visible light transmittance of about 85 to 100%, preferably about 87 to 98%, more preferably about 87 to 98% when a dispersed phase is not formed. Can be selected from a matrix of about 90-95%. For example, glass, transparent resin (transparent matrix resin), etc. can be used as the transparent matrix.

Examples of the transparent resin include thermoplastic resins, for example, styrene resins (polystyrene, acrylonitrile-styrene copolymer (AS resin), etc.), polyvinyl acetate resins (polyvinyl formal, polyvinyl butyral, etc.), (meta) Acrylic resins (poly (meth) acrylic acid such as polymethyl methacrylate, methyl methacrylate-styrene copolymer (MS resin), etc.), vinyl ester resins (polyvinyl acetate, vinyl acetate-vinyl chloride) Copolymers), vinyl ether resins (polyvinyl alkyl ether, etc.), halogen-containing resins (polyvinyl chloride, etc.), polyester resins (polyalkylene terephthalate, such as polyethylene terephthalate, polybutylene terephthalate, etc.) Resin, polycarbonate resin, polyamide resin (nylon 6, nylon 12, etc.), cellulose derivative (cellulose acetate, etc.). By using these thermoplastic resins, the front substrate and the reinforcing substrate can be bonded. For this reason, the strength of the evening panel can be increased, and even if the evening panel is broken, the broken substrate can be prevented from scattering and the safety can be enhanced. The preferred transparent resin is a polyvinyl acetate resin.

The dispersed phase dispersed in the transparent matrix reduces the transparency of the matrix and can form an image from the light projecting means as long as the image from the light emitting means can be formed. There is no particular limitation as long as the function of the screen can be provided. Such a dispersed phase is incompatible with a transparent matrix (such as a transparent resin) and has a different refractive index from the transparent matrix (for example, a refractive index difference of about 0.1 to 2, preferably 0.1 to 2). About 3 to 2, more preferably about 0.5 to 1.5) It can be selected from fine particle components (organic fine particles, inorganic fine particles, fiber components, etc.), and may be a gas phase (bubbles, etc.) if necessary. The disperse phase may be any of non-colored (white, colorless, etc.) and chromatic colors, and the uncolored disperse phase and the chromatic disperse phase may be combined. When an uncolored (especially white) dispersed phase is used, the translucent layer can be made milky white, and a natural color display close to the color (original color) emitted by the light emitting means can be obtained. When the chromatic dispersion phase is used, an image based on the color of the solid component can be displayed, and the taste can be enhanced. Among the non-colored dispersed phases, the organic fine particles can be selected from the transparent resins. Examples of the inorganic fine particles include metal oxides, metal halides, metal sulfides, and metal carbonates. Preferred metals include calcium (eg, calcium carbonate), barium (eg, barium sulfate), titanium (eg, titanium oxide), zinc (eg, gold oxide & zinc sulfide), aluminum (eg, aluminum oxide (eg, alumina), and hydroxide. Luminium etc.) are included. These inorganic fine particles can be used as an inorganic pigment (white pigment). As the fiber component, plant fiber (paper fiber), inorganic fiber (silicone fiber, alumina fiber, zirconia fiber, etc.) can be used. When using the gaseous phase, a transparent matrix surface can be watermarked, or gases (air, nitrogen, helium, etc.) can be dispersed in the transparent matrix.

 Among the chromatic dispersion phases, the organic fine particles include organic red dyes and pigments (such as quinacridone maroon medium red), organic yellow dyes and pigments (such as nickel azo green yellow), and green dyes (such as phthalocyanine green). And chromatic organic dyes and pigments such as organic blue dyes and pigments (such as phthalocyanine). Inorganic fine particles include inorganic red dyes and pigments (such as cadmium red), inorganic yellow dyes and pigments (such as titanium pigment yellow puff), inorganic green dyes and pigments (such as hydroxychrome green), and inorganic blue dyes and pigments. (Cobalt aluminate blue, etc.) can be used.

 Preferred dispersed phases include fine particle components (particularly, non-colored fine particles (such as white pigments), and combinations of non-colored fine particles and chromatic fine particles).

 The average diameter (such as average particle size) of the dispersed phase is, for example, about 0.1 to 20 m, preferably about 1 to 10 m, and more preferably about 1 to 5 m.

The ratio between the transparent matrix and the dispersed phase is, for example, about 100 / 0.01 to 100/10 (volume ratio), preferably about 100 / 0.1 to 100/5 (volume ratio). When a fine particle component is used for the dispersed phase, 100% by weight of the transparent matrix Parts by weight of the dispersed phase is, for example, about 0.01 to 10 parts by weight, preferably about 0.1 to 7 parts by weight, more preferably about 0.1 to 5 parts by weight (for example, 0.1 to 3 parts by weight). Parts by weight) or about 0.01 to 5 parts by weight. The translucent layer may be a single-layer translucent sheet composed of the transparent matrix and the dispersed phase, or may be a laminated sheet obtained by laminating a plurality of the translucent sheets.

 The thickness of the translucent layer is, for example, about 0.05 to 3 mm, preferably about 0.1 to 1 mm, and more preferably about 0.1 to 0.5 mm. If the thickness of the translucent layer is too thin, the front substrate and the reinforcing substrate have undulation (distortion) (especially when the substrate is made of tempered glass, the undulation is likely to occur). Is difficult to adhere. When the thickness of the translucent layer is too thin, it may be laminated with a transparent layer described later as necessary.

 The visible light transmittance of the translucent layer is, for example, about 40 to 75%, preferably about 50 to 70%, and more preferably about 55 to 65%. It should be noted that, among the transmitted light, the higher the proportion of the diffused light, the higher the screen display with excellent contrast. The ratio between the reflected light and the absorbed light is, for example, the former = about 70/30 to 30/70 (light quantity ratio), preferably about 65/35 to 35/65 (light quantity ratio), and more preferably It is about 40/60 to 60/40 (light intensity ratio).

 Further, the shielding ratio of the translucent layer may be, for example, about 0.65 to 0.85, preferably about 0.7 to 0.8. The shading coefficients can be measured based on Ashiura, I., Fundamentals Handbook, Chapter 27, Table 28, 1981 (AS Fundamentals, 1981 Fundamentals Handbook, Chapter 27, Table 28).

A glass substrate with a low surface acoustic wave attenuation factor (5.5 MHz acoustic wave attenuation coefficient of 0.5 dB / cm or less, preferably 0.4 dB / cm or less, More preferably, it is 0.3 dB / cm or less. For example, a soda lime glass (soda lime glass) substrate, a borosilicate glass substrate, a barium-containing glass substrate, and the like can be used.

 The visible light transmittance of the front substrate is, for example, about 85 to 100%, preferably about 87 to 98%, and more preferably about 90 to 95%.

Such a glass substrate for the front substrate, shot Glass Co., Ltd., trade name "B 270" (attenuation coefficient 0. 24 dB / cm, the thermal expansion coefficient of 9. 4 x 10- ⁶ / K, the visible light transmittance of 93 %), Asahi Glass Co., Ltd., product name "PD-200" (attenuation coefficient: 0.21 dB / cm, thermal expansion coefficient: 8.3 x 10- ^fi / K, visible light transmittance: 9 1%), Saint-Gobain Product name “CS 25” (average attenuation 0.18 dB / cm, coefficient of thermal expansion 8.3 X 10 K, visible light transmittance 90%), product name “Tempax” (manufactured by Shot Glass) It is available with an average attenuation of 0.30 dB / cm, a coefficient of thermal expansion of 3.3 x 10 " ^fi / K, and a visible light transmittance of 92%.

 The thickness of the front substrate is, for example, about 1 to 10 mm, preferably about 2 to 8 mm, and more preferably about 3 to 6 mm. If the thickness of the front substrate is too large, the distance between the sunset position (the input side surface of the front substrate) and the image display position (the surface on which the translucent layer is formed) will increase, and the parallax will increase. It will be difficult to enter the sunset at night.

 As the reinforcing substrate, various transparent substrates capable of reinforcing the front substrate to increase the strength of the touch panel, for example, tempered glass, laminated glass (laminated glass), organic glass (the resin constituting the transparent resin and the like) Safety glass such as a plate-like plastic made of the same resin) can be used.

The strength of the reinforced board is 0.9m (the drop height of the steel ball (limit height of the steel ball that does not break the board) in the destruction test of the 4mm thick reinforced board caused by the drop of the steel ball (227g). 3 feet) or more, preferably 1.2 meters (4 feet) or more. The reinforcing substrate has the same level of visible light transmittance as the front substrate.

A reinforcing substrate and the front substrate may for example have a thermal expansion coefficient comparable to one another, as the front substrate, the thermal expansion coefficient, for ^{example, 7 X 1 0- G ~l 0} X 1 0- 6 / about K, preferably ^{8 X 1 0- 6 ~9 · 5} X 1 0- when using a glass substrate of about ^fi / K, Seo one da-lime glass (thermal expansion coefficient 8 as a reinforcing substrate. 7 X 1 0 VK Degree) Tempered glass or laminated glass manufactured can be used. When the thermal expansion coefficients of the reinforcing substrate and the front substrate are substantially the same, warpage of the substrate due to a temperature change can be prevented.

 In the evening panel of the present invention, a transparent layer may be interposed between the translucent layer and the substrate (eg, between the translucent layer and the front substrate, between the translucent layer and the reinforcing substrate, etc.). Good. By interposing the transparent layer, even if the substrate (especially, a reinforced substrate made of tempered glass) has undulation (strain), the front substrate and the reinforced substrate can be adhered to each other. Also, if the substrate has undulation, laminating the translucent layer directly causes undulation in the image formed by the translucent layer.On the other hand, laminating the transparent layer on the substrate eliminates the undulation of the substrate. When a translucent layer is laminated on a transparent layer, a uniform display image can be obtained.

 The transparent layer may be colorless or chromatic (a red transparent layer, a blue transparent layer, etc.). When a chromatic transparent layer and a translucent layer (such as a milky white translucent layer) are combined, chromatic colors such as milky red (strawberry milk color) and milky blue (light blue like Asaka) are used. An interesting display image can be obtained.

 The colorless transparent layer can be formed by a transparent matrix constituting the translucent layer. The chromatic transparent layer can be formed by using a transparent matrix and a component (a dye, a pigment, etc.) compatible with the matrix. Obtainable.

The thickness of the transparent layer is, for example, about 0.1 to 5 mm, preferably about 0.2 to 3 mm, and more preferably about 0.3 to 2 mm. The total thickness of the transparent layer and the translucent layer is, for example, about 0.2 to 6 mm, preferably 0.4 to 4 mm. mm, more preferably about 0.5 to 2.5 mm.

 In addition, in the evening panel of the present invention, the reinforcing substrate is not always necessary as long as the strength of the front substrate is practically sufficient. FIG. 4 is a schematic cross-sectional view showing an example of such a sunset panel. In the evening touch panel 3b, a translucent layer 6 for imaging an image from the project evening is laminated on the back of a front substrate 4 for inputting the evening touch. In such an evening touch panel, the structure of the evening touch panel can be simplified, and the manufacturing cost can be reduced. Also, since there is no refraction or absorption of the projection light on the reinforcing substrate, a clearer image can be displayed.

 Furthermore, the evening panel of the present invention may be constituted by a translucent layer alone. In this case, glass (similar to the glass constituting the front substrate described above) is often used for the transparent matrix of the translucent layer in order to efficiently propagate acoustic waves.

 Further, the evening panel of the present invention is not necessarily limited to an acoustic wave type (ultrasonic type) evening panel as long as it has a translucent layer and can detect the evening spot position. For example, analog capacitive coupling method (capacitance coupling method) (See the monthly display January 1999, separate volume, pages 53 to 56), optical method (Japanese Unexamined Patent Publication No. Hei 11-230250) Gazette, Monthly Display July 19, 1996 Issue 8 pages 1 to 8 4), Resistive film method (4-wire method)

(4-wire), 5-wire (5-wire), etc. (Refer to Elo Proprietary Information, Monthly Display, July 1996 issue, pages 76-80, Elo Proprietary Information), Ultrasonic Digit Evening method (refer to Japanese Patent Application Laid-Open No. 11-203430), electromagnetic induction method

(See pages 90-97 and 98-100, July, 1996, July 1996) The conventional translucent layer may be combined with the conventional touch panel.

Analog capacitive coupling type touch panels include, for example, a resistive film (electrode) (tin-antimony oxide (TA)) on the front surface of a substrate (such as a glass substrate) to detect the position of the touch panel by storing and discharging charges. 0) film) and a protective film (glass film) for protecting this resistive film. Also, On the back surface of the substrate, a conductive film (such as an indium-tin-oxide (ITO) film) for shielding the electrodes from the electromagnetic waves of the monitor is formed in combination with the evening panel. I have. In such an analog capacitive coupling type touch panel, the translucent layer is formed by laminating the translucent layer on at least one of the basic members (protective film, resistive film, substrate, conductive film, etc.). The translucent layer can be formed by using the translucent layer for at least one of the non-conductive members (protective film, substrate, etc.) among the respective base members. Can form evening sunsets. The analog capacitive coupling type touch panel may be a through-glass (Thru Glass) type using two substrates (a glass substrate, a plastic substrate, etc.).

In addition, translucent touch panels such as an optical type, a resistive film type, an ultrasonic digitizer type, and an electromagnetic induction type are used as at least one of the basic members of each type of the touch panel. It can be formed by laminating translucent layers, or by constituting at least one non-conductive member with the translucent layer. In the case of the optical system, the base member is a transparent front substrate that is settled by a finger or a pen; in the case of the resistive film type, a cover sheet that is settled by a finger or a pen; A conductive film formed on the back surface, a resistive film formed opposite to the conductive film, a plastic sheet formed on the back surface of the resistive film (in the case of a four-wire system), a resistive film formed on the back surface of the resistive film or the plastic sheet. Formed reinforcing substrate, etc .; In the case of the ultrasonic digitizer system, a transparent front substrate set by a digitizer pen; In the case of the electromagnetic induction type, a transparent front substrate set by an electronic pen, arranged behind the substrate An example is a sensor board for receiving electromagnetic waves from an installed electronic pen. If the sunset surface of the sunset panel is composed of a translucent layer, The display can be set directly on the display surface, eliminating parallax. For example, in the case of an acoustic wave type touch panel, the front substrate may be formed of a translucent layer. In the case of other methods, Among the foundation members, a translucent layer can be used for a member that has conventionally constituted the touch surface, or a translucent layer can be laminated on the front surface of the member.

 When an information input device is configured using such a touch panel, the shape of the touch panel is not particularly limited. In addition to a circle, an oval, a polygon (a triangle, a square (a square, a rectangle, etc.), a hexagon, etc.) , Octagon, etc.).

 When the information input device is configured using a touch panel other than the acoustic wave type, the means for confirming the position of the touch panel (light emitting diode for light transmission and light receiving diode of the optical type; digitizer pen of the ultrasonic digital type). The receiving element for receiving the ultrasonic wave from the transmitter, etc.) and the cables for transmitting the sunset signal may be stored (covered) in the protective cover like the transmitting or receiving transducer.

 In the present invention, since the sunset panel is formed using a specific translucent layer, light from the project can be displayed with high clarity. In addition, since a translucent layer is formed in the evening touch panel, parallax is small and the evening touch accuracy can be improved. When an information input device is configured using such a touch panel, an image from a projector can be formed, so that it can be used simultaneously by multiple people and can be advantageously used in public facilities.

 Hereinafter, the ability to explain the present invention in more detail based on examples, the present invention is not limited by these examples.

 Example 1

Using the same touch panel as in FIG. 1 except that a transparent layer was formed between the reinforcing substrate and the translucent layer, the information input device shown in FIGS. 2 and 3 was formed. The touch panel 3 includes a disc-shaped thick thermally strengthened soda lime glass (thickness 8 mm, diameter 800 mm) as a reinforcing substrate, a circular transparent polyvinyl butyral film as a transparent layer (Solcia Japan Co., Ltd.) ), Thickness 25 mm, diameter 770 mm) 3 sheets, circular translucent polyvinyl butyral film as translucent layer (manufactured by Solusia Japan Co., Ltd.) Use, thickness 0.25 mm, One (770 mm in diameter), disk-shaped glass as front substrate (Shot Glass, trade name "B270" used, thickness 5 mm, diameter 770 mm) laminated in this order Formed.

 Example 2

 Using the same touch panel as in Fig. 4, the information input device shown in Figs. 2 and 3 was formed. The same materials as in Example 1 were used for the front substrate and the translucent layer of the evening touch panel.

 These information input devices were excellent in the visibility of the video, and the parallax was small and the sunset input could be performed accurately.

Claims

The scope of the claims 1. A sunset panel comprising a translucent layer capable of forming an image from a light projecting means, wherein the translucent layer has a fine particle dispersion structure in which a fine particle dispersed phase is formed in a transparent matrix. Evening Tsuchi Panel.  2. The evening touch panel according to claim 1, wherein a front substrate for inputting the evening touch and a translucent layer are laminated.  3. The evening panel according to claim 1, wherein a front substrate and a reinforcing substrate for reinforcing the front substrate are laminated via a translucent layer.  4. The sunset according to claim 3, wherein a transparent layer having a thickness of 0.1 to 5 mm is formed on at least one of the translucent layer and the front substrate and / or the translucent layer and the reinforcing substrate. Touch panel.  5. The evening panel according to claim 4, wherein the transparent layer is chromatic.  6. The translucent layer is composed of a transparent matrix resin, and a solid component having an average particle diameter of 0.1 to 20 μm that is incompatible with the matrix resin. The evening panel according to any one of claims 1 to 4, wherein the content is 0.01 to 5 parts by weight based on 100 parts by weight of the resin.  7. The evening panel according to claim 6, wherein the refractive index difference between the solid component and the matrix is 0.1 to 2.  8. The touch panel according to any one of claims 1 to 4, wherein the translucent layer is formed of a polyvinyl acetate resin in which at least one of white fine particles and chromatic fine particles is dispersed.  9. The evening panel according to any one of claims 1 to 4, wherein the translucent layer has a visible light transmittance of 30 to 70%. 10. The ratio of reflected light to absorbed light is the former / the latter = 30/70 to 70/30 (light intensity The evening touch panel according to claim 9, wherein the ratio is:  11. The sunset panel according to claim 1, wherein the position of the sunset is detected by transmitting a surface acoustic wave.  12. The sunset panel according to any one of claims 2 to 4, wherein the front substrate is formed of a glass substrate having a 5.5 MHz acoustic wave attenuation coefficient of 0.5 dB / cm or less. .  13. The evening panel according to claim 3, wherein the reinforcing substrate is at least one selected from tempered glass, laminated glass, and organic glass.  14. Information comprising: the evening panel according to any one of claims 1 to 4; a support unit for supporting the evening panel; and a light projecting unit for projecting an image on the evening panel. An input device, comprising: transmitting means for transmitting a surface acoustic wave to the surface of the touch panel; and receiving means for receiving the surface acoustic wave, wherein the transmitting means and the receiving means are provided with a protective cover. Information input device covered by