Abstract: The present disclosure relates to a TV main board apparatus, a TV, and a TV system. The TV main board apparatus includes: a casing having at least one opening; and a TV main board accommodated in the casing, and including a first interface and a second interface that are exposed outside the casing via their respective openings, and a power converting device, wherein the first interface can connect to a power supply so as to receive first electric power, the second interface can connect to a TV so as to transmit a multimedia signal and the first electric power to the TV, and the power converting device converts the first electric power into second electric power for powering the TV main board apparatus.

Abstract: A hollow-core photonic crystal fiber gas cell and method for preparing the same. The hollow-core photonic crystal fiber gas cell comprises a single-mode fiber, a fiber splicing protection sleeve, a hollow-core photonic crystal fiber, and a photoelectric detector. One end of the single-mode fiber is fusion spliced with one end of the hollow-core photonic crystal fiber to form a fusion splice and seal one end of the hollow-core photonic crystal fiber gas cell. The fiber splicing protection sleeve covers and protects the fusion splice. The other end of the hollow-core photonic crystal fiber is processed into an output end by fusion sealing, and the surface of the output end faces, but is not parallel to, a detection surface of the photoelectric detector.

Abstract: A hollow-core photonic crystal fiber gas cell and method for preparing the same. The hollow-core photonic crystal fiber gas cell comprises a single-mode fiber, a fiber splicing protection sleeve, a hollow-core photonic crystal fiber, and a photoelectric detector. One end of the single-mode fiber is fusion spliced with one end of the hollow-core photonic crystal fiber to form a fusion splice and seal one end of the hollow-core photonic crystal fiber gas cell. The fiber splicing protection sleeve covers and protects the fusion splice. The other end of the hollow-core photonic crystal fiber is processed into an output end by fusion sealing, and the surface of the output end faces, but is not parallel to, a detection surface of the photoelectric detector.

Abstract: A 3D intelligent terminal includes a camera, a signal processing unit, a register, a glasses switching signal emitter and a screen, the camera is used for taking a picture for objects in front of the screen of the 3D intelligent terminal, the signal processing unit is used for analyzing a taken images, judging if there is an audience in every pre-divided area and recording judging results in the register, the signal processing unit is also used for determining in which pre-divided area every audience is located, decoding the images of viewpoints corresponding to pre-divided areas with audience and sending the images of the viewpoints to the screen to display, the glasses switching signal emitter is used for sending glasses switching signals to 3D glasses, the screen is used for outputting the images of the viewpoints decoded by the signal processing unit.