Touch detection device using solar cells as touch sensing elements

Abstract

A touch detection device with solar cell as touch sensing element, comprising a solar cell, a touch chip, a first filter and a second filter; the solar cell generates a charging current to charge a rechargeable battery under irradiation of light; the touch chip is coupled to the solar cell and transmits and feeds back a TI pulse detection signal to detect human touch; the first filter is a high-pass filter electrically connected between an electrical contact of the solar cell and the touch chip to filter out the charging current by passing the TI pulse detection signal to the solar cell; the second filter is a low-pass filter coupled between the solar cell and the rechargeable battery to filter out the TI pulse detection signal by passing the charging current to charge the rechargeable battery; wherein the TI pulse detection signal is transmitted to the solar cell through the first filter, and the change of the TI pulse detection signal sensed by the touch chip is used to perceive human touch, so as to achieve the purpose of making the solar cell as a touch sensing element.

Description

Technical Field

[0001] This utility model relates to a touch detection device using a solar cell as a touch sensing element, and more particularly to a device that uses a solar cell as a touch sensing element and a filter to form a touch detection device, so as to enable the operation of an electrical appliance powered by a solar cell by touch. Background Technology

[0002] Existing touch technologies all require a separate touch sensing element to receive human touch signals. Touch sensing elements typically need to be made of conductors, such as copper foil, aluminum, carbon film, etc., and cannot be shared with other components, such as solar cells, batteries, rechargeable batteries, light-emitting elements, aluminum substrates, power cords, and casings, because these components cannot be combined with the touch sensing element and therefore cannot detect touch signals. Utility Model Content

[0003] In view of the shortcomings of existing touch technology, such as the inability of general electrical appliances to be combined with touch sensing elements, the purpose of this utility model is to provide a touch detection device that uses a solar cell as a touch sensing element, which can turn electrical appliances such as solar cells, rechargeable batteries, light-emitting components, aluminum substrates, power cords, and casings into touch sensing elements, thereby achieving the purpose of touch-controlled electrical appliances.

[0004] To achieve the above objectives, this utility model provides a touch detection device using a solar cell as a touch sensing element, comprising a solar cell, a touch chip, a first filter, and a second filter; wherein the solar cell generates a charging current to charge a rechargeable battery when illuminated, the touch chip is coupled to the solar cell and transmits and feeds back a TI clock detection signal for detecting human touch; the first filter is a high-pass filter electrically connected between an electrical contact of the solar cell and the touch chip, used to filter out the charging current while allowing the TI clock detection signal to reach the solar cell; and the second filter is a low-pass filter coupled between the solar cell and the rechargeable battery, used to filter out the TI clock detection signal while allowing the charging current to charge the rechargeable battery; wherein the TI clock detection signal is transmitted to the solar cell via the first filter, making the solar cell a touch sensing element, and the touch chip senses the change in the fed-back TI clock detection signal to detect human touch and outputs a touch signal, thereby achieving the purpose of making the solar cell a touch sensing element.

[0005] This electrical contact is the negative terminal of the solar cell.

[0006] This electrical contact is the positive terminal of the solar cell.

[0007] It also includes a power module coupled between the second filter and the rechargeable battery, used to convert the power of the solar cell to charge the rechargeable battery.

[0008] The power module is used to convert the power from the rechargeable battery to power the touch chip.

[0009] The power module also has a USB connection interface for drawing external power to charge the rechargeable battery or to supply the operating power required by the touch chip.

[0010] In one embodiment of the present invention, the above-mentioned touch detection device using a solar cell as a touch sensing element further includes an electrical appliance touch module connected to a touch chip, for receiving touch signals output by the touch chip to control the opening, closing or status control of an electrical appliance.

[0011] The electrical touch module is powered by the power module.

[0012] The appliance in question is a solar-powered lamp. Attached Figure Description

[0013] Figure 1 This is a block diagram illustrating the present invention using a solar cell as a touch sensing element.

[0014] Figure 2 This is a schematic diagram of the TI clock detection signal of the touch chip of this utility model.

[0015] Figure 3 This is an equivalent diagram of the solar cell of this utility model as a touch sensing element.

[0016] Figure 4 This is an equivalent diagram of the solar cell of this invention charging a rechargeable battery.

[0017] Figure 5 This is a schematic diagram of the first embodiment of the present invention, taking a solar charging lamp as an example.

[0018] Figure 6 This is a schematic diagram of the second embodiment of the present invention, taking a solar charging lamp as an example.

[0019] Figure 7 This is a schematic diagram of an embodiment of the present invention using an LED light board.

[0020] Figure 8 This is a schematic diagram of an embodiment of the present invention using a rechargeable battery.

[0021] Explanation of reference numerals in the attached diagram: 10-Solar cell; 20-Touch chip; 30-First filter; 40-Second filter; 50-Rechargeable battery; 60-Power module; 61-USB connection interface; 70-Electronic touch module; 71-LED light; 80-LED light board. Detailed Implementation

[0022] This utility model mainly relates to a technology for transforming electrical appliances such as solar cells into touch-sensitive control elements. Please refer to the following for further details. Figure 1 , Figure 2 and Figure 3 As shown, where Figure 1 This is a block diagram illustrating the present invention using a solar cell as a touch sensing element. Figure 2 This is a schematic diagram of the TI clock detection signal of the touch chip of this utility model, and Figure 3 This is an equivalent diagram of the solar cell used as a touch sensing element in this invention. This invention includes a solar cell 10, a touch chip 20, a first filter 30, and a second filter 40. Because the solar cell 10 contains a silicon substrate, it generates a charging current when exposed to light to charge a rechargeable battery 50. This invention utilizes this silicon substrate as a touch sensing element. The principle is to detect the TI clock signal generated by the touch chip 20... Figure 2 The signal is transmitted to an electrical contact of the solar cell 10, such as... Figure 3 The negative electrode of the solar cell 10 is used to sense changes in the TI clock detection signal fed back by the touch chip 20, which can detect whether it has been touched by a human body, thus making the solar cell 10 a touch sensing element.

[0023] However, the solar cell 10 generates charging current, which interferes with the TI clock detection signal. Therefore, this invention designs a first filter 30 to filter out the charging current, which is electrically connected between an electrical contact of the solar cell 10 and the touch chip 20. Figure 3 As shown, since the TI clock detection signal is a high-frequency signal and the charging current of the solar cell 10 is DC, the first filter 30 is a high-pass filter. It can pass the TI clock detection signal to the solar cell 10 and block and filter out the charging current of the solar cell 10, so that the touch chip 20 can effectively transmit or feed back the TI clock detection signal to the solar cell 10 for touch sensing.

[0024] Please refer to the following as well. Figure 1 and Figure 4 As shown, Figure 4This is an equivalent diagram of the solar cell charging a rechargeable battery according to this invention. The solar cell 10 generates a DC charging current to charge the rechargeable battery 50. The TI clock detection signal generated by the touch chip 20 is a high-frequency signal, which may interfere with the DC charging battery. Therefore, the second filter 40 designed in this invention is a low-pass filter, coupled between the solar cell 10 and the rechargeable battery 50, to charge the rechargeable battery 50 with the charging current while filtering out the TI clock detection signal.

[0025] Please refer to the following: Figure 5 and Figure 6 The diagram shown illustrates the first and second embodiments of this utility model, using a solar-powered charging lamp as an example. Figure 5 and Figure 6 The difference lies in that the first filter 30 is electrically connected to the negative and positive terminals of the solar cell 10, while this invention further includes a power module 60 coupled between the second filter 40 and the rechargeable battery 50. The power module 60 is used to convert the power from the solar cell 10 to charge the rechargeable battery 50, and also to convert the power from the rechargeable battery 50 to supply power to the touch chip 20. The power module 60 also has a USB connection interface 61 for drawing external power, such as a USB power plug or a power bank. When the solar cell 10 cannot generate charging current at night, an external USB power source or power bank can be used to charge the rechargeable battery 50, or to supply the power required by the touch chip 20.

[0026] For example Figure 5 and Figure 6 As shown, this embodiment of the present invention further includes an electrical touch control module 70 connected to the touch chip 20, used to receive a touch signal output by the touch chip 20, and control the opening, closing or status control of an electrical appliance. For example, in this embodiment, it is a solar lamp. The electrical touch control module 70 is further connected to an LED lamp 71. When a human touches the solar cell 10, the touch chip 20 transmits a TI clock detection signal to the solar cell 10 through the first filter 30. The touch chip 20 can detect the feedback TI clock detection signal to determine that a human touch has occurred, and then outputs a touch signal to the electrical touch control module 70 to open, close or control the status of the electrical appliance, such as adjusting the brightness of the light. The electrical touch control module 70 is further connected to the power module 60, which supplies the required working power.

[0027] Please see Figure 7The diagram shown is a schematic of an embodiment of the present invention using an LED light board. The present invention can also use the aluminum substrate of the LED light 71 as a touch sensing element. In this embodiment, the first filter 30 is connected to the negative terminal of the LED light 71. Similarly, the touch chip 20 transmits the TI clock signal to the negative (-) terminal of the LED light 71 through the first filter 30. Then, the TI signal is transmitted to the aluminum substrate through the copper foil of the negative (-) terminal of the LED light 71, so that the LED light board 80 forms a touch sensing element. By sensing that the LED light board 80 is touched, a touch signal is output to the electrical touch module 70 to perform touch control of the LED light board 80, such as turning the LED light 71 on or off, or adjusting the brightness of the light, etc. In this embodiment, the operating power of the LED light 71 is supplied by the electrical touch module 70 through the second filter 40.

[0028] Please see Figure 8 The diagram shown is a schematic of the present invention using a rechargeable battery as an example. Similarly, the metal casing surface of the rechargeable battery 50 can also be used as a touch sensing element. The TI clock detection signal generated by the touch chip 20 is transmitted to the negative terminal of the rechargeable battery 50 through the first filter 30 to detect whether the surface of the rechargeable battery 50 is touched. The rechargeable battery 50 also supplies power to the touch chip 20 through the second filter 40.

[0029] In summary, through multiple embodiments, this utility model fully illustrates that it utilizes a high-pass filter to turn the metal surface of an electrical appliance into a touch sensing element, and utilizes a low-pass filter to ensure the normal transmission and supply of DC power, thereby achieving the purpose of combining and sharing the sensing element with the electrical appliance.

Claims

1. A touch detection device using a solar cell as a touch sensing element, characterized in that, The device includes: A solar cell is used to generate a charging current to charge a rechargeable battery when exposed to sunlight. A touch chip, coupled to the solar cell, transmits and feeds back a TI clock detection signal to detect human touch; A first filter, which is a high-pass filter, is electrically connected between an electrical contact of the solar cell and the touch chip to filter out the charging current by detecting the signal from the TI clock to the solar cell. A second filter, a low-pass filter, is coupled between the solar cell and the rechargeable battery to charge the rechargeable battery through the charging current while filtering out the TI clock detection signal; and The TI clock detection signal is transmitted to the solar cell via the first filter, so that the solar cell becomes a touch sensing element. The touch chip senses the change in the TI clock detection signal and detects human touch, and outputs a touch signal.

2. The touch detection device using a solar cell as a touch sensing element as described in claim 1, characterized in that, This electrical contact is the negative terminal of the solar cell.

3. The touch detection device using a solar cell as a touch sensing element as described in claim 1, characterized in that, This electrical contact is the positive terminal of the solar cell.

4. The touch detection device using a solar cell as a touch sensing element as described in claim 1, characterized in that, It also includes a power module coupled between the second filter and the rechargeable battery to convert the power from the solar cell to charge the rechargeable battery.

5. The touch detection device using a solar cell as a touch sensing element as described in claim 4, characterized in that, The power module is used to convert the power supplied by the rechargeable battery to the operating power of the touch chip.

6. The touch detection device using a solar cell as a touch sensing element as described in claim 4, characterized in that, The power module also has a USB connection interface for drawing external power to charge the rechargeable battery or to supply the operating power required by the touch chip.

7. The touch detection device using a solar cell as a touch sensing element as described in claim 4, characterized in that, It also includes an appliance touch module connected to the touch chip, used to receive touch signals output by the touch chip to control the opening, closing or status control of an appliance.

8. The touch detection device using a solar cell as a touch sensing element as described in claim 7, characterized in that, The electrical touch module is powered by the power module.

9. The touch detection device using a solar cell as a touch sensing element as described in claim 7, characterized in that, The appliance is a solar-powered lamp.

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