Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a full-colour perforated screen for a smart watch. The full-colour perforated screen is provided with perforations. The perforations are used for hands of a smart watch to pass through. The full-colour perforated screen comprises a TP functional sheet (1), an OCA (8), an upper polarizer (2), an upper glass sheet (9), a lower glass sheet (3), a lower polarizer (10), a shading black adhesive (4), a light intensifying film I (5), a light intensifying film II (11), a light scattering film (6), a light guide sheet (12), a light reflecting sheet (7) and a steel sheet (13) from left to right in sequence. A smart watch having the full-colour perforated screen provides a larger operating space for a user and reinforces the user experience.
A: A dial plate of a smart watch comprises a main body (12), a first screen (14), a second screen (16) and a third screen (18). The first screen (14) is rotatably connected to the main body (12) by means of a first rotating shaft (13), the second screen (16) is rotatably connected to the main body (12) by means of a second rotating shaft (15), and the third screen (18) is rotatably connected to the main body (12) by means of a third rotating shaft (17). The second rotating shaft (15) and the third rotating shaft (17) are opposite and parallel to each other, the first rotating shaft (13) is perpendicular to the second rotating shaft (15), and the vertical distances between the first rotating shaft (13), the second rotating shaft (15) and the third rotating shaft (17) and the main body (12) are sequentially decreased progressively, so that the first screen (14), the second screen (16) and the third screen (18) can be arranged above the main body (12) in an overlaid manner. Also provided is a smart watch. Therefore, the display screen of the smart watch can be expanded.
B: A method for unlocking a screen of a smart watch comprises: on the basis of a characteristic of rotation of a hand on a dial of a smart watch, implementing an unlocking function for the smart watch by manually controlling the hand to rotate with an angle greater than a preset angle. Also disclosed are a device for unlocking a screen of a smart watch, and the smart watch, so as to solve the problem of affected use experience of a user who uses a smart phone for a long period and is accustomed to unlocking operations due to the fact that an unlocking mechanism is not set in the smart watch.
C: Disclosed are a smart watch crown and an operating method for a smart watch. A crown is provided on a side face of a smart watch, and the crown is connected to the smart watch via a connecting component. The crown comprises: a crown body, wherein a side face of the crown body is a recessed structure, a concentric shaft is provided in the recessed structure, and the concentric shaft and the connecting component are concentrically connected to the smart watch; the crown body is used for controlling the zooming in or zooming out of a display interface of the smart watch; and the concentric shaft is used for moving the content of the display interface.
D: A smart watch having a dual-antenna structure, the watch comprising a watch band (3) and a watch case (4). The watch band (3) is connected to the watch case (4). A main board (5) is disposed within the watch case (4). The smart watch further comprises a first antenna structure (1) and a second antenna structure (2). The first antenna structure (1) is disposed at the watch case (4). The second antenna structure (2) is disposed at the watch band (3). The main board (5) is connected to or provided with a detection module (52) for detecting whether the smart watch is in a state of being worn, and a switch module (53) for switching between the first antenna structure (1) and the second antenna structure (2). The first antenna structure (1) and the second antenna structure (2) are connected to the switch module (53). The smart watch having a dual-antenna structure and the control method enable the watch to always select an antenna structure having better performance, such that the antenna performance is not degraded by decreasing bulk of the watch. The antenna performance also effectively improves signal quality and increases battery run-time.
Answer: A