Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: An optical system affixed to an electronic apparatus is provided, including a first optical module, a second optical module, and a third optical module. The first optical module is configured to adjust the moving direction of a first light from a first moving direction to a second moving direction, wherein the first moving direction is not parallel to the second moving direction. The second optical module is configured to receive the first light moving in the second moving direction. The first light reaches the third optical module via the first optical module and the second optical module in sequence. The third optical module includes a first photoelectric converter configured to transform the first light into a first image signal.

Abstract: A sound producing control circuit assembly includes a box covered with a fixed supporting board and fastened to a picture frame at the back to hold a sound producing circuit. A movable conductive board is supported on springs above the fixed supporting board and is urged against the glass of the picture frame to hold down a picture. The fixed supporting board has a first contact metal plate and a second contact metal plate with contact legs spaced above the first contact metal plate for controlling the operation of the sound producing circuit. When the glass is pressed against the movable conductive plate, at least one contact leg of the second contact metal plate is forced to contact the first contact metal plate causing the sound producing circuit to be electrically connected to thereby produce sound.