Display screens having optical fluorescent materials

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.

1 - 92 . (canceled) 
     
     
         93 . A device, comprising a display screen and an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying images and scans the excitation light onto the display screen in a two dimensional pattern to direct the optical pulses at different locations on the display screen to display the images, wherein the display screen includes:
 a light-emitting layer that absorbs excitation light to emit visible light, includes a plurality of different light-emitting materials which absorb the excitation light to emit light at different visible wavelengths different in wavelength from the excitation light, and is patterned into a plurality of light-emitting regions, wherein three adjacent light-emitting regions are made of three different light-emitting materials and emit light at three different visible wavelengths, respectively, and define a color pixel dimension of the display screen, and   a first layer on a first side of the light-emitting layer to transmit the excitation light and to reflect the visible light, the first layer comprising a composite film stack of multiple polymer films that are coextruded to have alternating high and low refractive indices to form an optical interference filter.   
     
     
         94 . The device as in  claim 93 , wherein the display screen includes a second layer on a second side of the light-emitting layer to transmit the visible light and to block the excitation light. 
     
     
         95 . The device as in  claim 93 , wherein the display screen includes a Fresnel lens located on the first side of the light-emitting layer to direct the excitation light of the one or more optical excitation beams scanned by the optical module at different incident angles at different locations on the display screen to be approximately normal to the first layer and the light-emitting layer. 
     
     
         96 . The device as in  claim 93 , wherein the composite film stack comprises films which have different refractive indices between two adjacent films and are laminated or fused with one another to transmit the excitation light and to reflect the visible light emitted by the light-emitting layer. 
     
     
         99 . The device as in  claim 93 , wherein the light-emitting layer includes boundaries that respectively separate adjacent light-emitting regions and each boundary substantially inhibits light from one light-emitting region to propagate to an adjacent light-emitting region. 
     
     
         100 . The device as in  claim 93 , wherein the light-emitting layer includes boundaries that respectively separate adjacent light-emitting regions and each boundary is optically absorbent. 
     
     
         101 . The device as in  claim 93 , comprising:
 an optical sensor that receives light from the screen to produce a sensor signal indicative of an alignment condition of the excitation light on the screen with respect to the light-emitting regions on the screen; and   a feedback control coupled to the optical sensor to receive the sensor signal and to control the optical module to adjust alignment of the excitation light on the screen in response to the alignment condition of the excitation light on the screen with respect to the light-emitting regions.   
     
     
         102 . A device, comprising:
 an optical module that includes one or more lasers producing excitation light of one or more optical excitation beams modulated to carry optical pulses carrying image information, and a scanning device scanning the excitation light to excite the display the image information; and   a screen positioned relative to the optical module to receive the excitation light and to absorb energy of the excitation light to emit visible light that renders the images to be visible, the screen including a substrate, a light-emitting layer formed on the substrate and including light-emitting regions formed on the substrate such that two adjacent light-emitting regions absorb excitation light to emit light at two different colors, respectively, and a composite film stack positioned in an optical path of the excitation light between the light-emitting layer and the optical module to receive the excitation light,   wherein the composite film stack includes multiple polymer films that are coextruded to have alternating high and low refractive indices to form an optical interference filter that transmits the excitation light to the light-emitting layer and reflects the visible light emitted by the light-emitting layer.   
     
     
         103 . The device as in  claim 102 , wherein the light-emitting regions include phosphor materials. 
     
     
         104 . The device as in  claim 103 , wherein the phosphor materials include nanoscale phosphor grains. 
     
     
         105 . The device as in  claim 102 , wherein the fluorescent materials include non-phosphor fluorescent materials. 
     
     
         106 . The device as in  claim 105 , wherein the non-phosphor fluorescent materials include quantum dots. 
     
     
         107 . The device as in  claim 102 , wherein the composite film stack comprises films which have different refractive indices between two adjacent films and are laminated or fused with one another to transmit the excitation light and to reflect the visible light emitted by the light-emitting layer. 
     
     
         108 . The device as in  claim 102 , wherein the light-emitting layer includes boundaries that respectively separate adjacent light-emitting regions and each boundary substantially inhibits light from one region to propagate to the adjacent region. 
     
     
         109 . The device as in  claim 102 , wherein the light-emitting layer includes boundaries that respectively separate adjacent light-emitting regions and each boundary is optically absorbent. 
     
     
         110 . The device as in  claim 102 , comprising:
 an optical sensor that receives light from the screen to produce a sensor signal indicative of an alignment condition of the excitation light on the screen with respect to the light-emitting regions on the screen; and   a feedback control coupled to the optical sensor to receive the sensor signal and to control the optical module to adjust alignment of the excitation light on the screen in response to the alignment condition of the excitation light on the screen with respect to the light-emitting regions.   
     
     
         111 . The device as in  claim 102 , wherein the screen includes a screen layer on a second side of the light-emitting layer opposite to a side where the composite film stack is located so that the light-emitting layer is between the composite film stack and the screen layer, the screen layer operable to transmit the visible light and to block the excitation light. 
     
     
         112 . The device as in  claim 102 , comprising:
 a Fresnel lens located between the optical module and the composite film stack to direct the excitation light of the one or more optical excitation beams scanned by the optical module at different incident angles at different locations on the screen to be approximately normal to the screen.   
     
     
         113 . The device as in  claim 102  wherein the screen includes a contrast enhancing layer that is positioned on a side of the light-emitting layer opposite to a side where the composite film stack is, and that includes different filtering regions that spatially match the light-emitting regions to receive and filter emitted visible light from respective spatially matched light-emitting regions, where each filtering region transmits light of a color that is emitted by a corresponding spatially matched light-emitting region and blocks light of other colors. 
     
     
         114 . The device as in  claim 102 , wherein the screen includes a screen gain layer which includes a diffractive optical element and modifies light emitted by the light-emitting layer.