Please select the most similar patent number from A, B, C and D. Which number is?
A solar energy powered smart watch comprises a watch body (1) and a watch band (2) which are integrally formed. The interior of the watch body (1) is provided with a display unit (13) comprising a display screen (111), a solar cell plate (112), and a first anti-reflective coating (113). The watch band (2) comprises a storage battery (22), a thin-film solar cell (23) comprising two expandable cell plates (231, 232), and a second anti-reflective coating (24). The solar cell plate (112) and the thin-film solar cell (23) convert solar energy into electric energy, supply the same to the smart watch, and charge the storage battery (22). The first anti-reflective coating (113) and the second anti-reflective coating (24) are used to eliminate reflected light from the solar cell plate (112) and the thin-film solar cell (23), respectively. The smart watch uses two solar cells (112, 23) and the storage battery (22) to realize autonomous power supply, thereby solving a problem of a short battery operating time.
A: An adjustable solar-powered smart wearable device, comprising a device mounting base (1) and a watchband (2). A mounting cavity (3) is provided on the upper surface of the device mounting base (1). The adjustable solar-powered smart wearable device is formed as a whole unit by adding a retraction apparatus I (6) and a retraction apparatus II (7) to connect the watchband (2) to the device mounting base (1). During use, a switch I (18) controls a motor (12) to operate or not and adjusts the tightness of the watchband (2) so that the watchband is always tightened in different states of people, so as to facilitate the use, and the same product can meet the requirements of different populations, and therefore, the application range is wider. In addition, by adding a solar panel assembly (23) to supply power for a device body (5), the smart wearable device is more environmentally-friendly and energy-saving in use.
B: Provided is a thin-film solar window LED light, comprising: an LED light strip (1), a solar charge controller (5), a storage battery (4), an LED drive controller (3), and a thin-film solar cell (2). The LED light strip (1) is arranged on an inner side of a top of a casement. The thin-film solar cell (2) is attached onto a glass of the casement. The solar charge controller (5), the storage battery (4) and the LED drive controller (3) are arranged inside a window frame (6) of the casement. The thin-film solar cell (2) is connected to the storage battery (4) via the solar charge controller (5), and the storage battery (4) is connected to the LED light strip (1) via the LED drive controller (3). In the day, when sunlight shines, the thin-film solar cell (2) attached onto the glass generates electricity and stores the same in the storage battery (4); at night, the storage battery (4) supplies electricity to the LED light strip (1) via the LED drive controller (3), thereby providing indoor lighting. The window LED light of the present invention can function as a curtain in addition to lighting. Moreover, the window LED light is readily designed and manufactured, and is easily installed.
C: Disclosed is a solar battery inductor (10). The solar battery inductor (10) comprises: a solar battery panel (11) and a rod part (12). The rod part (12) is fixedly connected to the solar battery panel (11). The rod part (12) is inserted into the soil. First humidity sensors (121) are respectively arranged at different depth positions of the rod part (12). The first humidity sensors (121) are used to collect the soil moisture at different depths. The solar battery panel (11) comprises a power module (111), an infrared sensor (112) and a receiving and sending module (113). The power module (111) is used to absorb solar energy and convert solar energy into electric energy. The infrared sensor (112) is used to collect plant heights. The receiving and sending module (113) is used to send the plant heights and soil moisture to terminal equipment. Solar energy is converted into electric energy by the power module (111) of the solar battery panel (11), and power is continuously supplied to various sensors, which avoids cumbersome processes for charging the various sensors regularly. In addition, the growth status of plants can be determined by changes in the water seepage speed and plant heights, such as changes in the growth rate and water seepage speed of soil with the plant height.
D: A leisure mobility scooter powered by solar energy, comprising a solar cell panel assembly disposed on the roof of an electric scooter body, and an energy storage unit connected to the solar cell panel assembly to store electric energy; the energy storage unit is connected to an electric scooter drive mechanism via a circuit control unit and supplies power to the electric scooter drive mechanism; an inclined solar cell panel assembly is also provided on the front of the electric scooter and/or the back of the electric scooter; and the solar cell panel assembly is also connected to the energy storage unit via the circuit to store the electric energy. The solar cell panel assemblies are respectively provided on the roof and the front, or the back of the electric scooter, thus improving the capability of a single electric scooter to convert solar energy into electric energy, and in turn guaranteeing the supply of drive energy for the electric scooter coming from solar energy, and achieving resource saving and green environmental protection. In addition, an attractive pattern is provided on the solar cell panel assembly on the front of the electric scooter so as to achieve a decorative effect. The electric scooter is attractive and elegant, and has an ingenious design and strong practicability, particularly suitable for the disabled or the elderly to use rather than walking.
Answer: A