Abstract: Disclosed are a light polarization state detection apparatus, a detection method and a light polarization state modulation method. The light polarization state detection apparatus comprises a lens with a variable birefringence feature as an optical phase modulator, a polarizer as a SOP analyzer, a plurality of common lenses and a CCD as imaging devices, and a data processing and displaying unit. The SOP detection apparatus uses wide special birefringence distribution of birefringence optical elements such as a GRIN lens to obtain the Stokes parameters of light to be measured by CCD single frame imaging, and can rapidly accurately measure the SOP. The SOP detection apparatus is simple in structure, lower in cost without containing any motion parts and electrical modulation devices, and is a fully static full Stokes parameters SOP detection apparatus.

Abstract: An electronic device case which includes a bottom shell, a plurality of side shells, a first hanging lug and a second hanging lug is disclosed. The side shells are connected to the bottom shell. The first hanging lug is located on one of the side shells. The first hanging lug includes a first top plate, a first supporting plate, a first hole and a first arch bridge part. The first supporting plate is connected to the first top plate. The first hole is located on the first top plate. The first arch bridge part supports the first top plate. The second hanging lug is located on the bottom shell. The second hanging lug includes a second top plate and a second supporting plate. The second supporting plate is connected to the second top plate.

Abstract: An electronic device case which includes a bottom shell, a plurality of side shells, a first hanging lug and a second hanging lug is disclosed. The side shells are connected to the bottom shell. The first hanging lug is located on one of the side shells. The first hanging lug includes a first top plate, a first supporting plate, a first hole and a first arch bridge part. The first supporting plate is connected to the first top plate. The first hole is located on the first top plate. The first arch bridge part supports the first top plate. The second hanging lug is located on the bottom shell. The second hanging lug includes a second top plate and a second supporting plate. The second supporting plate is connected to the second top plate.

Abstract: Disclosed are a light polarization state detection apparatus, a detection method and a light polarization state modulation method. The light polarization state detection apparatus comprises a lens with a variable birefringence feature as an optical phase modulator, a polarizer as a SOP analyzer, a plurality of common lenses and a CCD as imaging devices, and a data processing and displaying unit. The SOP detection apparatus uses wide special birefringence distribution of birefringence optical elements such as a GRIN lens to obtain the Stokes parameters of light to be measured by CCD single frame imaging, and can rapidly accurately measure the SOP. The SOP detection apparatus is simple in structure, lower in cost without containing any motion parts and electrical modulation devices, and is a fully static full Stokes parameters SOP detection apparatus.

Abstract: A lamp tube switching circuit includes a first connector and a second connector for connecting either an LED lamp tube or a fluorescent type lamp tube, a switch module being a mechanical switch including first, second and third switches, a starter and ballast. Each of the first and second switches has a static terminal for connecting with a power supply, and four dynamic terminals for selectively connecting with the static terminal thereof. Different circuits can be configured by adjusting the connection between the static and dynamic terminals, wherein each circuit can drive a selected type of lamp tube to generate light.

Abstract: A lamp tube switching circuit includes a first connector and a second connector for connecting either an LED lamp tube or a fluorescent type lamp tube, a switch module being a mechanical switch including first, second and third switches, a starter and ballast. Each of the first and second switches has a static terminal for connecting with a power supply, and four dynamic terminals for selectively connecting with the static terminal thereof. Different circuits can be configured by adjusting the connection between the static and dynamic terminals, wherein each circuit can drive a selected type of lamp tube to generate light.