Patent ID: 8803772

Claim:
A display device, comprising: a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light of different colors, a first layer on a first side of the fluorescent layer operable to transmit the excitation light and to reflect the visible light, and a Fresnel lens formed on the first side of the fluorescent layer to direct the excitation light incident to the display screen at different angles at different locations to enter the fluorescent layer with entry directions being approximately normal to the fluorescent layer, wherein the first layer comprises a composite sheet of a plurality of dielectric layers that are coextruded to have alternating high and low refractive indices to form an optical interference filter; an optical module operable to produce scanning beams of the excitation light that scan across the display screen and positioned to direct the scanning beams of the excitation light to enter the display screen to reach the fluorescent layer, each scanning beam carrying optical pulses that carry information of different colors on a colored image to be generated by the emitted visible light of different colors by the fluorescent layer; an optical sensing unit positioned to receive a portion of light from the screen that is different in wavelength from the excitation light of the scanning beams from the optical module and operable to produce a monitor signal indicating a spatial alignment of each scanning beam on the screen; and a feedback control mechanism operable to receive the monitor signal and to control the optical module to adjust a timing of the optical pulses carried by each scanning beam in response to the monitor signal to correct a spatial alignment error of the scanning beam on the display screen indicated by the monitor signal, and wherein the optical module includes: an array of diode lasers that produce different laser beams of the excitation light, respectively; a signal modulation controller coupled to the diode lasers to provide modulated driving currents to the diode lasers, respectively with one driving current per one diode laser, to directly modulate each driving current to cause modulation of each laser beam carrying optical pulses that carry information of different colors; a laser array mounting rack structured to hold the array of diode lasers in a fan configuration to direct the laser beams as a fan of converging laser beams; and a laser scanning module that receives the fan of converging laser beams and scan the received laser beams as scanning beams onto the display screen.