Back to results
US 8,803,772 B2Granted
Display systems having screens with optical fluorescent materials
AssigneePrysm, Inc.
InventorsDavid L. Kent, Phillip H. Malyak, Roger A. Hajjar, Patrick Tan, David Kindler
Life of this patent
Estimating the term…
Abstract
Fluorescent screens and display systems and devices based on such screens using at least one excitation optical beam to excite one or more fluorescent materials on a screen which emit light to form images. The fluorescent materials may include phosphor materials and non-phosphor materials such as quantum dots. A screen may include a multi-layer dichroic layer.
Claims69
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.
8 more elements
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 array of diode lasers operable to produce laser beams of the excitation light, each laser 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;
- 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 scanning module positioned to receive the laser beams from the diode lasers and to scan the laser beams across the display screen to enter the display screen to reach the fluorescent layer;
- 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, wherein the laser scanning module receives the fan of converging laser beams and scans the received laser beams as scanning beams onto the display screen;
- 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 laser beams and operable to produce a feedback control signal indicating a spatial alignment of each scanning laser beam on the screen;
- and
- a feedback control mechanism operable to control directions of the scanning laser beams from the scanning module to adjust a timing of the optical pulses carried by each scanning laser beam, in response to the feedback control signal, to correct an error in the spatial alignment.
5 more elements
A display device, comprising:
- a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light of different colors, and a first layer on a first side of the fluorescent layer operable to transmit the excitation light and to reflect the visible light, 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.
8 more elements
A display device, comprising:
- a display screen comprising a fluorescent layer that absorbs excitation light to emit visible light of different colors, and a first layer on a first side of the fluorescent layer operable to transmit the excitation light and to reflect the visible light, 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 array of diode lasers operable to produce laser beams of the excitation light, each laser 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;
- 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 scanning module positioned to receive the laser beams from the diode lasers and to scan the laser beams across the display screen to enter the display screen to reach the fluorescent layer;
- 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, wherein the laser scanning module receives the fan of converging laser beams and scans the received laser beams as scanning beams onto the display screen;
- 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 laser beams and operable to produce a feedback control signal indicating a spatial alignment of each scanning laser beam on the screen;
- and
- a feedback control mechanism operable to control directions of the scanning laser beams from the scanning module to adjust a timing of the optical pulses carried by each scanning laser beam, in response to the feedback control signal, to correct an error in the spatial alignment.
5 more elements
Dependencies are inferred from the claim text.