Abstract: A data transmission system is disclosed. The data transmission system includes at least one signal processing device, at least one conversion device, at least one antenna device, and at least one flexible printed circuit board. The at least one signal processing device is configured to generate or receive at least one data. The at least one conversion device is configured to transform between the at least one data and an optical signal. The at least one antenna device is configured to obtain the at least one data according to the optical signal, and configured to receive or transmit the at least one data wirelessly. The at least one flexible printed circuit board includes at least one conductive layer and at least one optical waveguide layer. The at least one optical waveguide layer is configured to transmit the optical signal.

Abstract: A speaker module includes a base, a speaker and a wire. The base has a bottom and a first wire fixing portion. The speaker is disposed in the base and has a second wire fixing portion. The wire is fixed to the first wire fixing portion and the second wire fixing portion to suspend the speaker in the base, and the speaker is separated from the bottom with a distance. A projection device having the speaker module is further provided.

Abstract: A cushioning member includes a support portion, a first latch portion, a second latch portion, a first connection portion, a second connection portion, a first guide portion and a second guide portion. The first guide portion, the first latch portion, and the first connection portion are arranged opposite to the second connection portion, the second latch portion and the second guide portion on basis of the support portion as a center. When the first and second latch portions are in a relaxed state, a width of the support portion in a direction perpendicular to the axial direction is greater than a width of the first latch portion and a width of the second latch portion in the direction.

Abstract: A speaker module includes a base, a speaker and a wire. The base has a bottom and a first wire fixing portion. The speaker is disposed in the base and has a second wire fixing portion. The wire is fixed to the first wire fixing portion and the second wire fixing portion to suspend the speaker in the base, and the speaker is separated from the bottom with a distance. A projection device having the speaker module is further provided.

Abstract: A projection lens includes a lens barrel, at least one lens, a focus adjusting ring, a focus adjusting gear, and a driving module. The at least one lens is disposed in the lens barrel. The focus adjusting ring is disposed on the lens barrel. The focus adjusting gear is fixed on the focus adjusting ring. The driving module is connected with the focus adjusting gear. The driving module includes a motor, a motor gear, a limiter, and an elastic element. The motor has a rotating shaft. The motor gear is penetrated through by the rotating shaft and engages with the focus adjusting gear. The limiter is fixed on the rotating shaft. The elastic element is disposed between the limiter and the motor gear, wherein the limiter applies a normal force to the motor gear through the elastic element.

Abstract: A projection lens includes a lens barrel, at least one lens, a focus adjusting ring, a focus adjusting gear, and a driving module. The at least one lens is disposed in the lens barrel. The focus adjusting ring is disposed on the lens barrel. The focus adjusting gear is fixed on the focus adjusting ring. The driving module is connected with the focus adjusting gear. The driving module includes a motor, a motor gear, a limiter, and an elastic element. The motor has a rotating shaft. The motor gear is penetrated through by the rotating shaft and engages with the focus adjusting gear. The limiter is fixed on the rotating shaft. The elastic element is disposed between the limiter and the motor gear, wherein the limiter applies a normal force to the motor gear through the elastic element.

Abstract: A ribbon cassette structure is provided. The provided ribbon cassette structure includes a cartridge having at least a rotating structure. The rotating structure includes a first actuating element, a first connecting element, a second actuating element and a support shaft. The first connecting element is located between the first actuating element and the second actuating element, and the second actuating element is located between the first actuating element and the support shaft.

Abstract: A ribbon cassette structure is provided. The provided ribbon cassette structure includes a cartridge having at least a rotating structure. The rotating structure includes a first actuating element, a first connecting element, a second actuating element and a support shaft. The first connecting element is located between the first actuating element and the second actuating element, and the second actuating element is located between the first actuating element and the support shaft.

Abstract: An integrated projector comprising a body with a projector circuit internally and a projection lens externally, a card reader installed on the body to read the data inside the memory card, a video interface installed on the body to receive video signals, and a video player that is a DVD player built-in inside the body. Users can read the data in the memory card, watch TV and watch DVD with a single projector without extra wiring.