Abstract: A photo detector including a photo sensor part and a power source module is provided. The power source module is fixed on the photo sensor part and electrically connected to the photo sensor part. The power source module is detachable and includes a handle.

Abstract: A light projecting apparatus of a scanner module, including: a substrate, a plurality of light emitting diodes (LEDs), positioned on the substrate and adapted to generate a plurality of incident beams; a diffusion plate, corresponding to the plurality of LEDs, adapted to receive the plurality of incident beams and diffuse the plurality of incident beams uniformly over a scanned object and including: a first plane, receiving the plurality of incident beams; two end faces; connected to the two ends of the first plane in a transverse direction; and a second plane, the two ends thereof being respectively connected to the two end faces, adapted to diffuse the plurality of incident beams uniformly over the scanned object and including: a plurality of second transverse concave portions, adapted to diffuse the plurality of incident beams; and a plurality of second transverse convex portions, adapted to gather the plurality of incident beams, where the plurality of second transverse convex portions and the plurality o

Abstract: A light projecting apparatus of a scanner module, including: a substrate, a plurality of light emitting diodes (LEDs), positioned on the substrate and adapted to generate a plurality of incident beams; a diffusion plate, corresponding to the plurality of LEDs, adapted to receive the plurality of incident beams and diffuse the plurality of incident beams uniformly over a scanned object and including: a first plane, receiving the plurality of incident beams; two end faces; connected to the two ends of the first plane in a transverse direction; and a second plane, the two ends thereof being respectively connected to the two end faces, adapted to diffuse the plurality of incident beams uniformly over the scanned object and including: a plurality of second transverse concave portions, adapted to diffuse the plurality of incident beams; and a plurality of second transverse convex portions, adapted to gather the plurality of incident beams, where the plurality of second transverse convex portions and the plurality o

Abstract: The present invention provides a multi-resolution printing device, which includes a base-frequency clock generator and a control unit. The base-frequency clock generator is to generate only one base-frequency clock. The control unit includes a logic processor, a first frequency divider, a second frequency divider, and an external selector. Divisors of the first and second dividers are determined by resolution of the base-frequency clock and that of the desired printing clocks. While remainders of the base-frequency clock resolution divided by the desired printing clock resolutions are not zero, divisors of first and second frequency dividers are set to be the quotient and the quotient plus one; otherwise, divisors of first and second frequency dividers are all set to be the same quotient. The resolution of desired printing clock is obtained by executing the above procedure excursively.