JP2011060608A - Capacitance type touch switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein thinning of equipment is unsuitable since thickness of the whole equipment with a touch switch installed thereon is increased if a solar cell is prepared on a lower layer of the touch switch and light loss is generated since light passing through the touch switch reaches the solar cell and efficiency of electromotive force of the solar cell is worsened. <P>SOLUTION: Thinning of the equipment for installing the capacitance type touch switch 7 is made since the capacitance type touch switch 7 is constituted by setting a part of transparent electrode pattern 3 on a back surface of a transparent substrate 2 arranged on a front surface side of the solar cell 1 as a transparent electrode 3b for detecting electrostatic capacity. Light loss resulting from the capacitance type touch switch 7 is not generated since the light directly reaches the solar cell, and the efficiency of electromotive force of the solar cell is not worsened. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a capacitive touch switch that detects on / off when a user touches with a finger or the like.

  In the electronic desk calculator, the liquid crystal display unit, solar cell unit, and keyboard each have a space, but the keyboard unit is configured with a transparent touch switch, and the solar cell unit is disposed below the transparent touch switch. The space occupied by the solar cell is no longer necessary, and the size is reduced accordingly (Patent Document 1).

  Information devices and input devices equipped with a liquid crystal display use a primary battery or a secondary battery as a power source. However, a solar cell unit is placed on the lower layer of a film-like liquid crystal panel with a transparent electrode coated on the upper surface to form a touch panel. By laminating together and allowing the light that has passed through the liquid crystal panel to reach the lower solar cell unit, a wide power generation area of the same size as the liquid crystal panel can be obtained, and a solar cell can be used as a power source (Patent Document 2). ).

Japanese Utility Model Publication No. 61-189352 JP 2003-167233 A

  When a solar cell is provided below the touch switch or touch panel, the thickness of the entire device on which the touch switch or touch panel is mounted is increased, which is not suitable for thinning. Moreover, since the light which passed through the touch switch or the touch panel reaches the solar cell, light loss occurs, and the efficiency of the electromotive force of the solar cell is deteriorated.

  In the invention described in claim 1 (hereinafter referred to as “present invention 1”), a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front surface side of the solar cell is used as a transparent electrode for capacitance detection. This is a capacitive touch switch characterized by the following.

  The invention according to claim 2 (hereinafter referred to as “present invention 2”) is the capacitive touch switch according to the present invention 1, wherein a transparent insulating layer is provided as a film of the transparent electrode for capacitance detection, The capacitive touch switch is characterized in that a power generation unit of the solar cell is provided on the lower surface side of the transparent electrode for capacitance detection.

  The invention according to claim 3 (hereinafter referred to as “present invention 3”) is a transparent electrode pattern on the back surface of a transparent substrate disposed on the front side of an organic electroluminescent (hereinafter referred to as “organic EL”) panel. A capacitive touch switch is characterized in that a part of the transparent electrode is used as a capacitance detection transparent electrode.

  According to the first aspect of the present invention, the capacitive touch switch is configured with a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front surface side of the solar cell as the transparent electrode for capacitance detection. Capacitive touch switch can be manufactured at low cost. It is possible to reduce the thickness of a device equipped with a capacitive touch switch. Since light reaches the solar cell directly, no optical loss occurs due to the capacitive touch switch, and the efficiency of the electromotive force of the solar cell does not deteriorate.

  According to the second aspect of the present invention, the capacitive touch is provided by providing the transparent insulating layer as the coating of the transparent electrode for capacitance detection and providing the power generation unit of the solar cell on the lower surface side of the transparent electrode for capacitance detection. The built-in switch type solar cell can achieve substantially the same power generation efficiency as a non-capacitive touch switch built-in type solar cell.

  According to the third aspect of the present invention, the capacitive touch switch is configured by using a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front surface side of the organic EL panel as the transparent electrode for capacitance detection. Capacitive touch switch can be manufactured at low cost. It is possible to reduce the thickness of a device equipped with a capacitive touch switch.

Sectional drawing which shows a silicon-type solar cell (Example 1). The top view which shows the transparent electrode pattern of the solar cell of FIG. The top view which shows the usage example of the solar cell of FIG. Sectional drawing which shows the deformation | transformation structure (Example 2) of the solar cell of FIG. Sectional drawing which shows an organic type solar cell (Example 3). Sectional drawing of an organic electroluminescent illumination panel (Example 4). The top view which shows the transparent electrode pattern of the organic EL lighting panel. The perspective view which shows the usage example of the same organic EL lighting panel.

  The first aspect of the present invention configures a capacitive touch switch using a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front side of the solar cell as a capacitive detection transparent electrode, and has a built-in capacitive touch switch. Type solar cell.

  The second aspect of the present invention provides a capacitive touch by providing a transparent insulating layer as a coating film for a capacitance detection transparent electrode and forming a light absorption layer of a solar cell on the lower surface side of the capacitance detection transparent electrode. It achieves almost the same power generation efficiency as a solar cell with a built-in switch and a solar cell without a capacitive touch switch.

  According to the third aspect of the present invention, a capacitive touch switch is configured by using a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front surface side of the organic EL panel as a transparent electrode for capacitance detection. A built-in organic EL panel is realized.

  Embodiments 1 to 4 of the present invention 1 will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view showing a silicon-based solar cell as an example of a solar cell. In FIG. 1, light is incident from above, and the solar cell 1 is insulated on the surface side (upper surface side = light incident side). A transparent electrode 3a, a PIN junction amorphous silicon layer 4 as a light absorption layer (electromotive portion = power generation portion), and a PIN junction crystal silicon as a light absorption layer The layer 5 and the back electrode 6 are sequentially laminated to constitute a solar cell element (cell), which converts light directly into electric power and outputs it. By using a glass plate for the transparent substrate 2, an ITO electrode or an FTO electrode for the transparent electrode 3, and an ITO electrode or an FTO electrode for the back electrode 6, the transparent solar cell 1 can be realized.

  FIG. 2 is a plan view showing the transparent electrode pattern of the solar cell of FIG. 1, and the transparent electrode pattern 3 includes a transparent conductive film (not shown) formed on the back surface of the transparent substrate 2 and a transparent electrode 3a for solar cells. The capacitance detection transparent electrode 3b and its transparent wiring 3c are formed by patterning in a desired shape. In FIG. 2, the upper part of the transparent electrode pattern 3 is used as the solar cell transparent electrode 3a and the lower part is electrostatic. It is used for the capacitance detecting transparent electrode 3b and its transparent wiring 3c. In this way, the capacitive touch switch 7 is configured by using a part of the transparent electrode pattern 3 on the back surface of the transparent substrate 2 disposed on the front surface side of the solar cell 1 as the electrostatic capacitance detection transparent electrode 3b. A built-in capacitive touch switch.

  In FIG. 1, reference numeral 8 denotes a capacitance for providing a power generation unit (a PIN junction amorphous silicon layer 4 or a PIN junction crystal silicon layer 5) in the back side (lower side) region of the capacitance detection transparent electrode 3 b. It is a film of the transparent electrode 3b for detection, Comprising: It is a transparent insulating layer formed by application | coating or film-forming.

  3 is a plan view showing an example of use of the solar cell of FIG. 1. In FIG. 3, 9a and 9b are mobile phones, 10a and 10b are mobile phone 9a and 9b cases, 11a and 11b are case 10a, 10b is a liquid crystal display or an organic EL display as a display unit disposed on the surface of 10b, and the right mobile phone 9a has a simple solar cell 1a which is not a built-in capacitive touch switch on the screen of the display unit 11a. Therefore, a mechanical switch 12 is disposed below the display unit 11a. On the other hand, the left mobile phone 9b has the capacitive touch switch built-in type solar cell 1 attached on the screen of the display unit 11b, so that the mechanical switch 12 is not required below the display unit 11a. The size is reduced accordingly. That is, the capacitive touch switch 7 realizes downsizing of the device.

  In the left mobile phone 9b, the solar cell 1 has the transparent electrode 2 and the back substrate 6 connected to a device control board (not shown) accommodated in the housing 10b via a connector and a cable (not shown). The electric power generated by the solar cell 1 is properly used for the operation of the mobile phone 9b and the charging of the secondary battery accommodated in the housing 10b.

  The capacitance detection transparent electrode 3b is arranged at a position corresponding to a touch switch unit (not shown) displayed on the screen of the display unit 11b, and is mounted on the device control board to detect a change in capacitance. The transparent wiring 3c is connected to a dedicated IC (not shown) via a connector and a cable (not shown). The electrostatic capacitance type touch switch 7 indicates that a finger of a user has touched (touched) the surface of the transparent substrate 2 corresponding to the electrostatic capacitance detection transparent electrode 3b. A switch element is generated on the screen of the display unit 11 by detecting a change in capacitance between the electrodes 3b, generating a touch switch signal, and operating the device when the user touches with a finger or the like.

  Since the electrostatic capacitance type touch switch 7 comprises a part of the transparent electrode pattern 3 on the back surface of the transparent substrate 2 arranged on the front surface side of the solar cell 1 as the electrostatic capacitance detecting transparent electrode 3b. Type touch switch 7 can be manufactured at low cost. It is possible to reduce the thickness of a device on which the capacitive touch switch 7 is mounted. Since light directly reaches the solar cell 1, no optical loss is generated by the capacitive touch switch 7, and the efficiency of the electromotive force of the solar cell 1 does not deteriorate.

  In addition, the capacitive touch switch 7 is provided with a transparent insulating layer 8 as a film of the electrostatic capacitance detection transparent electrode 3b, and the power generation unit of the solar cell 1 is provided on the lower surface side of the electrostatic capacitance detection transparent electrode 3b. Thus, the solar cell 1 with a built-in capacitive touch switch can achieve substantially the same power generation efficiency as a solar cell without a built-in capacitive touch switch.

  4 is a cross-sectional view showing a modified structure of the solar cell of FIG. 1. In FIG. 4, the solar cell 13 is a power generation part (a PIN junction amorphous silicon layer 4 only in the back side region of the solar cell transparent electrode 3). 1 is different from the solar cell 1 of the first embodiment shown in FIG. 1 in that the crystalline silicon layer 5) having a PIN junction and the back electrode 6 are formed. The code | symbol is attached | subjected.

  FIG. 5 is a cross-sectional view showing an organic solar cell as another example of the solar cell. In FIG. 5, light is incident from above, the solar cell 21 is a dye-sensitized type, and the surface side (upper surface side = Transparent electrode 23a on the back surface (lower surface) of the insulating transparent substrate 22 disposed on the light incident side) and transparent on the surface (upper surface) of the insulating transparent substrate 24 disposed on the back surface side (lower surface side). A dye-sensitized semiconductor layer 28 composed of a titanium dioxide layer 27 on which a sensitizing dye 26 such as a trace amount of ruthenium complex is adsorbed as a light absorption layer (electromotive part = power generation part), For example, an electrolyte layer 29 containing iodine such as an iodine solution is sandwiched to form a solar cell element (cell), which converts light directly into electric power and outputs it. Glass plates and plastic sheets are used for the transparent substrates 22 and 24, and ITO electrodes and FTO electrodes are used for the transparent electrodes 23a and 25.

  Also in this solar cell 21, as shown in FIG. 2, the transparent electrode pattern 23 on the surface side is similar to the solar cell 1 of Example 1 shown in FIG. 1 and the solar cell 13 of Example 2 shown in FIG. Is formed by patterning a transparent conductive film (not shown) formed on the back surface of the transparent substrate 22 into a desired shape as a solar cell transparent electrode 23a, a capacitance detection transparent electrode 23b, and a transparent wiring 23c thereof, The upper part of the transparent electrode pattern 23 is used for the transparent electrode 23a for solar cells, and the lower part is used for the transparent electrode 23b for electrostatic capacitance detection and its transparent wiring 23c. In this way, the capacitive touch switch 30 is configured by using a part of the transparent electrode pattern 23 on the back surface of the transparent substrate 22 disposed on the front surface side of the solar cell 21 as the electrostatic capacitance detection transparent electrode 23b. A built-in capacitive touch switch.

  In FIG. 5, reference numeral 31 denotes a capacitance detection transparent electrode 23b for providing a power generation unit (the dye-sensitized semiconductor layer 28 and the electrolyte layer 29) also in the back side (lower side) region of the capacitance detection transparent electrode 23b. And a transparent insulating layer formed by coating or film formation.

  In this solar cell 21 as well, as in the solar cell 13 of Example 2 shown in FIG. 4, which is a modified structure of the solar cell 1 of Example 1 shown in FIG. In addition, the structure can be modified so as to form the power generation unit (the dye-sensitized semiconductor layer 28 and the electrolyte layer 29) and the counter electrode 25.

  The solar cell 21 of Example 3 shown in FIG. 5 can be used in the same manner as the solar cell 1 of Example 1 shown in FIG. 1, and exhibits the same effect. The capacitive touch switch can be appropriately incorporated into a solar cell using an element material other than silicon-based or organic-based (for example, compound-based) shown in the first to third embodiments.

  Next, an embodiment of the present invention 3 (embodiment 4 as a whole) will be described with reference to FIGS.

  FIG. 6 is a cross-sectional view showing an organic EL lighting panel as an example of the organic EL panel. In FIG. 6, light is emitted upward, and the organic EL lighting panel 41 is on the front side (upper surface side = light emission side). A transparent electrode (positive electrode) 43a, a hole transport layer 44, a light emitting layer 45 made of an organic compound, and a cathode 46 are sequentially laminated on the back side (lower side) of the insulating transparent substrate 42 disposed on the organic EL element. (Cell) is formed, and is excited by applying an electric field to the light emitting layer 45 to emit light. A glass plate or plastic sheet is used for the transparent substrate 42, an ITO electrode or an FTO electrode is used for the transparent electrode 43a, and an ITO electrode, an FTO electrode, a magnesium electrode, or an aluminum electrode is used for the cathode 46.

  FIG. 7 is a plan view showing the transparent electrode pattern of the organic EL lighting panel of FIG. 6, and the transparent electrode pattern 43a is formed by replacing a conductive film (not shown) formed on the back surface of the transparent substrate 42 with the organic EL transparent electrode 43a. The capacitance detection transparent electrode 43b and its wiring 43c are formed by patterning in a desired shape. In FIG. 7, the upper part of the transparent electrode pattern 43 is used as the organic EL transparent electrode 43a and the lower part is electrostatic. It is used for the capacitance detection transparent electrode 43b and its transparent wiring 43c. In this way, the capacitive touch switch 47 is configured by using a part of the transparent electrode pattern 43 on the back surface of the transparent substrate 42 arranged on the front surface side of the organic EL lighting panel 41 as the capacitance detecting transparent electrode 43b, and the organic EL illumination. The panel 41 is configured as a capacitive touch switch built-in type.

  In FIG. 6, reference numeral 48 denotes a film of the capacitance detection transparent electrode 43b for providing the light emitting layer 45 also on the back surface side (lower surface side) region of the capacitance detection transparent electrode 43b. It is a transparent insulating layer to be formed.

  In this organic EL lighting panel 41 as well, the back surface of the organic EL transparent electrode 23a is the same as the solar cell 14 of Example 2 shown in FIG. 4, which is a modified structure of the solar cell 1 of Example 1 shown in FIG. The structure can be modified so that the light emitting layer 45 and the cathode 46 are formed only in the side region.

  FIG. 8 is a plan view showing an example of use of the organic EL lighting panel of FIG. 6. In FIG. 8, reference numeral 48 denotes a stand using an organic EL lighting panel 41 with a built-in capacitive touch switch as a light source. The organic EL transparent electrode 43a and the cathode 46 of the EL lighting panel 41 are accommodated in, for example, a leg portion 42 of the stand 41 and connected to a commercial power source via a power cord. Connected through. The electrostatic capacitance detection transparent electrode 43b is disposed, for example, in the lower left corner of the organic EL lighting panel 41, and a transparent wiring 43c is connected to a dedicated IC (not shown) mounted on the device control board in order to detect a change in electrostatic capacitance. Are connected via a connector and a cable (not shown). The electrostatic capacitance type touch switch 47 indicates that the user's finger or the like has touched (touched) the surface of the lower left corner of the organic EL lighting panel 41 corresponding to the electrostatic capacitance detection transparent electrode 43b. The surface of the organic EL lighting panel 41 is a switch element that detects a change in the capacitance between the capacitance detection transparent electrodes 3b, generates a touch switch signal, and operates the device when the user touches with a finger or the like. Realize with.

  Of course, the capacitive touch switch 47 eliminates a mechanical switch such as an on / off switch of the stand 8, and the stand 48 is downsized accordingly. That is, the capacitive touch switch 47 realizes downsizing of the device.

  Since the capacitive touch switch 47 is configured by forming a part of the transparent electrode pattern 43 on the back surface of the transparent substrate 42 arranged on the front surface side of the organic EL panel 41 as the transparent electrode 43b for electrostatic capacitance detection. The capacitive touch switch 47 can be manufactured at low cost. It is possible to reduce the thickness of a device on which the capacitive touch switch 47 is mounted.

DESCRIPTION OF SYMBOLS 1,13,21 Solar cell 2,22 Transparent substrate 3 Transparent electrode pattern 3a Transparent electrode for solar cells 3b Transparent electrode for electrostatic capacitance detection 7,30 Capacitive touch switch 8,31 Transparent insulating layer 41 Organic EL lighting panel (Organic EL panel)
42 Transparent Substrate 43 Transparent Electrode Pattern 43a Transparent Electrode for Organic EL 43b Transparent Electrode for Capacitance Detection 47 Capacitive Touch Switch

Claims (3)

  A capacitive touch switch characterized in that a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front surface side of the solar cell is used as a transparent electrode for capacitance detection.   2. The static electricity according to claim 1, wherein a transparent insulating layer is provided as a film of the capacitance detection transparent electrode, and a power generation unit of the solar cell is provided on a lower surface side of the capacitance detection transparent electrode. Capacitive touch switch.   A capacitive touch switch, wherein a part of the transparent electrode pattern on the back surface of the transparent substrate disposed on the front side of the organic electroluminescent panel is used as a transparent electrode for capacitance detection.

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