Patent ID: 7971790

Claim:
A laser pointer with controllable patterns and sizes of projecting images comprising: a housing disposed with a projection window through which scanning light beams pass; a human-machine interface arranged on an outer surface of the housing for control of a frequency/phase control module, a driving energy control module, a laser beam generating module, and a light scanning device, as well as a pattern or size of images formed by projection of the scanning light beams; wherein the frequency/phase control module is mounted in the housing and, by means of the human-machine interface, driving modes having frequency and/or phase difference thereof are changed, the frequency/phase control module also being used to control the driving energy control module; wherein the driving energy control module is mounted in the housing and a driving energy mode thereof having a change of driving energy is controlled by the frequency/phase control module while the driving energy control module is used to control scanning modes of the light scanning device; wherein the laser beam generating module is mounted in the housing, modes of laser beams generated from the laser beam generating module are controlled by the human-machine interface, and the laser beam is projected to the light scanning device and turned into a scanning light beam according to the scanning mode of the light scanning device; wherein the light scanning device is mounted in the housing and formed by a one-dimensional light scanning mirror while the scanning modes of the light scanning device are controlled by the frequency/phase control module or the driving energy control module so as to make the laser beam become the scanning light beam that projects through the projection window to form an image; wherein the size of the image is controlled by changing an amplitude or scanning angle of the light scanning device; wherein the amplitude is changed by increasing or decreasing the driving energy or by changing the driving frequency that is close to or far away from the resonant frequency of the light scanning device; and wherein, under control of the human-machine interface, a single spot or a line with controllable length is projected just in time.