3results about "Slide projectors" patented technology

The present invention provides a film disc for a story projector, configured to be inserted into a story projector main body to achieve synchronous playback of images and audio. The film disc includes a housing, a rotating disc, and an audio module. The housing is provided with a projection hole and a driving hole. The rotating disc is rotatably installed in the housing and is provided with a film sheet corresponding to the projection hole, and one side of the rotating disc is provided with a transmission member configured to mesh with a driving assembly of the story projector main body. The audio module includes an audio board and a storage unit, the storage unit stores audio data corresponding to an image on the film sheet, and the audio board is installed on the housing for data interaction with the main body.

A road surface delineation device (10) includes a plurality of light sources (12) capable of being individually lit up; a mask (18) having a plurality of transmission windows (20) respectively illuminated by corresponding light sources (12) among the plurality of light sources (12); a partition (22) dividing a space between the plurality of light sources (12) and the mask (18) into a plurality of sections each having a mutually corresponding light source (12) and transmission window (20); and a common projection lens (16) projecting light respectively from the plurality of light sources (12) through the corresponding transmission windows (20) to a road surface.