Full color display with gradient index lens array disposed between phosphor emitters and liquid crystal display

Claim 2

A full color display comprising: light source means having a light emitting surface and having a plurality of individual visible light emitters for providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of primary color visible light emitters being arranged spatially on the light emitting surface so that light from at least three different primary color visible light emitters forms a mixture color by additive spatial juxtaposition, primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; image forming means for receiving the primary color visible light from the light source means and for forming a full color image, the image forming means having a matrix of individually addressable light modulating pixels, the matrix having modulation means associated with it for modulating the amount of primary color visible light received from the light source means; light coupling lens array means disposed between the light emitting surface and the image forming means and not abutted against the modulation means, for optically coupling the spatially separated primary color visible light from one of the plurality of primary color visible light emitters to a respective one of the light modulating pixels; each lens of the light coupling lens array means having optical properties to collect substantially all of the primary color visible light from more than one of the plurality of primary color visible light emitters and to focus a real image thereof in respective light modulating pixels; and image display means, disposed to receive the full color image from the image forming means, for displaying the full color image in such a manner as to be visible to a human observer.

Claim 3

The full color display according to claim 1 wherein the image display means includes light diffusing means for displaying the visible full color image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 4

The full color display according to claim 1 wherein the light coupling lens array means includes a two dimensional array of light conducting rod lenses, each rod lens having a graded refractive index distribution and having optical properties to collect the primary color visible light from each primary color visible light emitter and to focus each collection of primary color visible light as a real image into the respective pixel of the image forming means.

Claim 5

The full color display according to claim 1 wherein the light coupling lens array means includes a two dimensional array of two phase light conducting rod lenses, each rod lens having a graded refractive index distribution and having optical properties to collect the primary color visible light from each primary color visible light emitter and to focus each collection of primary color visible light as a real, noninverted image into the respective pixel of the image forming means.

Claim 6

The full color display according to claim 4 wherein the light coupling lens array means further includes a light absorbing shield disposed between the light source means and the two dimensional array of light conducting rod lenses for masking areas between each rod lens to eliminate stray light.

Claim 7

The full color display of claim 1, wherein the image forming means further comprises a transmissive liquid crystal cell having a pair of transparent substrates for containing a light conducting liquid crystal material; the matrix of individually addressable light modulating pixels with associated modulation means being disposed on one of the transparent substrates of the liquid crystal cell; and a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; and wherein the modulation means modulates optical transmission of the primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell in response to signals received from the voltage source.

Claim 8

The full color display according to claim 1, wherein the liquid crystal material is a nematic liquid crystal material of a twisted configuration capable of causing a rotation of a polarization plane of the primary color visible light in response to the electric field applied across the nematic liquid crystal material; and the image forming means further includes a first linear polarizer disposed between the light source means and the liquid crystal cell, for polarizing in a first polarization plane the primary color visible light emitted from the light emitting surface before it enters the liquid crystal cell; and a second linear polarizer disposed on a light emitting side of the liquid crystal cell for controlling optical transmission of the primary color visible light emanating from the liquid crystal cell according to the rotation of the first polarization plane of the light from the cell.

Claim 9

A full color transmissive liquid crystal display comprising: light source means having a light emitting surface and having a plurality of phosphor emitters for providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of phosphor emitters being arranged spatially on the light emitting surface so that light from at least three different primary color phosphor emitters forms a mixture color by additive spatial juxtaposition, the light source means including excitation means for exciting the phosphor emitters to emit visible light, primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; a transmissive liquid crystal cell, disposed to receive the primary color visible light from the light emitting surface, having a pair of transparent substrates for containing a light conducting liquid crystal material, and including a planar matrix of individually addressable light modulating pixels with associated modulation means disposed on one of the transparent substrates; a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; wherein the modulation means modulates optical transmission of primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell, in response to signals received from the voltage source; light coupling lens array means for optically coupling the primary color visible light from each of the plurality of phosphor emitters to a respective one of the light modulating pixels, the light coupling lens array means being disposed between the light emitting surface and the transmissive liquid crystal cell and not abutted against the modulation means and each lens of the light coupling lens array means having optical properties to collect substantially all of the primary color visible light from more than one of the phosphor emitters and to couple the spatially separated primary color visible light to the modulation means and to focus a real image thereof in respective light modulating pixels; and image display means, disposed to receive the full color image from the transmissive liquid crystal cell, for displaying the full color image, the image display means including light diffusing means for displaying the image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 10

A full color transmissive liquid crystal display comprising: light source means having a light emitting surface and having a plurality of phosphor emitters for providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of phosphor emitters being arranged spatially on the light emitting surface so that light from at least three different primary color phosphor emitters forms a mixture color by additive spatial juxtaposition, the light source means including excitation means for exciting the phosphor emitters to emit visible light, primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; a transmissive liquid crystal cell, disposed to receive the primary color visible light from the light emitting surface, having a pair of transparent substrates for containing a light conducting liquid crystal material, and including a planar matrix of individually addressable light modulating pixels with associated modulation means disposed on one of the transparent substrates; a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; wherein the modulation means modulates optical transmission of primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell, in response to signals received from the voltage source; light coupling lens array means for optically coupling the primary color visible light from each of the plurality of phosphor emitters to a respective one of the light modulating pixels, the light coupling lens array means being disposed between the light emitting surface and the transmissive liquid crystal cell and not abutted against the modulation means and each lens of the light coupling lens array means having optical properties to collect substantially all of the primary color visible light from more than one of the phosphor emitters and to couple the spatially separated primary color visible light to the modulation means and to focus a real image thereof in respective light modulating pixels; and image display means, disposed to receive the full color image from the transmissive liquid crystal cell, for displaying the full color image, the image display means including light diffusing means for displaying the image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 11

The full color transmissive liquid crystal display according to claim 8, wherein the liquid crystal material is a nematic liquid crystal material of a twisted configuration capable of causing a rotation of a polarization plane of the primary color visible light in response to the electric field applied across the nematic liquid crystal material; and further including a first linear polarizer disposed between the light emitting surface and the liquid crystal cell, for polarizing in a first polarization plane the primary color visible light emitted from the light emitting surface before it enters the liquid crystal cell; and a second-linear polarizer disposed on a light emitting side of the liquid crystal cell for controlling the optical transmission of the primary color visible light emanating from the liquid crystal cell according to the rotation of the first polarization plane of the light from the cell.

Claim 12

The full color liquid crystal display according to claim 9, wherein the matrix of individually addressable light modulating pixels and the light coupling lens array means are substantially the same size as, and in substantially aligned registration with, the light emitting surface of the light source means so that each pixel of the matrix is in substantially aligned registration with a respective one of the plurality of primary color visible light emitters; and wherein the light coupling lens array means has optical properties to collect substantially all of the primary color visible light from each emitter and to focus a real image thereof in the respectively aligned pixel.

Claim 13

A full color display comprising a light source having a light emitting surface and having a plurality of individual visible light emitters, the light source providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of primary color visible light emitters being arranged spatially on the light emitting surface so that light from at least three different primary color visible light emitters forms a mixture color by additive spatial juxtaposition; the primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; an image forming device receiving the primary color visible light from the light source and forming a full color image; the image forming device having a matrix of individually addressable light modulating pixels, the matrix having a modulator associated with it for modulating the amount of primary color visible light received from the light source; a lens array, disposed between the light emitting surface and the image forming device and not abutted against the modulator, each lens of the lens array optically coupling the spatially separated primary color visible light from more than one of the plurality of primary color visible light emitters to respective light modulating pixels, each lens of the lens array having optical properties to collect substantially all of the primary color visible light from more than one of the plurality of primary color visible light emitters and to focus a real image thereof in respective light modulating pixels; and a display device, disposed to receive the full color image from the image forming device, the display device displaying the full color image in such a manner as to be visible to a human observer.

Claim 14

A full color display comprising a light source having a light emitting surface and having a plurality of individual visible light emitters, the light source providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of primary color visible light emitters being arranged spatially on the light emitting surface so that light from at least three different primary color visible light emitters forms a mixture color by additive spatial juxtaposition; the primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; an image forming device receiving the primary color visible light from the light source and forming a full color image; the image forming device having a matrix of individually addressable light modulating pixels, the matrix having a modulator associated with it for modulating the amount of primary color visible light received from the light source; a lens array, disposed between the light emitting surface and the image forming device and not abutted against the modulator, each lens of the lens array optically coupling the spatially separated primary color visible light from more than one of the plurality of primary color visible light emitters to respective light modulating pixels, each lens of the lens array having optical properties to collect substantially all of the primary color visible light from more than one of the plurality of primary color visible light emitters and to focus a real image thereof in respective light modulating pixels; and a display device, disposed to receive the full color image from the image forming device, the display device displaying the full color image in such a manner as to be visible to a human observer.

Claim 15

The full color display according to claim 11 wherein the image display device includes a light diffuser to display the visible full color image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 16

The full color display according to claim 11 wherein the lens array includes a two dimensional array of light conducting rod lenses, each rod lens having a graded refractive index distribution and having optical properties to collect the primary color visible light from each primary color visible light emitter and to focus each collection of primary color visible light as a real image into the respective pixel of the image forming device.

Claim 17

The full color display according to claim 11 wherein the lens array includes a two dimensional array of two phase light conducting rod lenses, each rod lens having a graded refractive index distribution and having optical properties to collect the primary color visible light from each primary color visible light emitter and to focus each collection of primary color visible light as a real, noninverted image into the respective pixel of the image forming device.

Claim 18

The full color display according to claim 14 wherein the lens array further includes a light absorbing shield disposed between the light source and the two dimensional array of light conducting rod lenses for masking areas between each rod lens to eliminate stray light.

Claim 19

The full color display of claim 11, wherein the image forming device further comprises a transmissive liquid crystal cell having a pair of transparent substrates containing a light conducting liquid crystal material; the matrix of individually addressable light modulating pixels with associated modulator being disposed on one of the transparent substrates of the liquid crystal cell; and a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; and wherein the modulator modulates optical transmission of the primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell in response to signals received from the voltage source.

Claim 20

The full color display according to claim 16, wherein the liquid crystal material is a nematic liquid crystal material of a twisted configuration capable of causing a rotation of a polarization plane of the primary color visible light in response to the electric field applied across the nematic liquid crystal material; and the image forming device further includes a first linear polarizer disposed between the light source and the liquid crystal cell, for polarizing in a first polarization plane the primary color visible light emitted from the light emitting surface before it enters the liquid crystal cell; and a second linear polarizer disposed on a light emitting side of the liquid crystal cell for controlling optical transmission of the primary color visible light emanating from the liquid crystal cell according to the rotation of the first polarization plane of the light from the cell.

Claim 21

A full color transmissive liquid crystal display comprising: a light source having a light emitting surface and a plurality of phosphor emitters for providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of phosphor emitters being arranged spatially on the light emitting surface so that light from at least three different primary color phosphor emitters forms a mixture color by additive spatial juxtaposition; the light source including excitation means for exciting the phosphor emitters to emit visible light; the primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; a transmissive liquid crystal cell, disposed to receive the primary color visible light from the light emitting surface, having a pair of transparent substrates for containing a light conducting liquid crystal material, and including a planar matrix of individually addressable light modulating pixels with associated modulator disposed on one of the transparent substrates; a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; wherein the modulator modulates optical transmission of primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell, in response to signals received from the voltage source; a lens array optically coupling the spatially separated primary color visible light from each of the plurality of phosphor emitters to a respective one of the light modulating pixels; the lens array being disposed between the light emitting surface and the transmissive liquid crystal cell, and not abutted against the modulator, each lens of the lens array having optical properties to collect substantially all of the primary color visible light from more than one of the phosphor emitters and to focus a real image thereof in respective light modulating pixels; and a image display device, disposed to receive the full color image from the transmissive liquid crystal cell, the image display device displaying the full color image, the image display device, including a light diffuser displaying the image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 22

A full color transmissive liquid crystal display comprising: a light source having a light emitting surface and a plurality of phosphor emitters for providing to the full color display visible light with wavelength emission spectra in at least three primary colors, the plurality of phosphor emitters being arranged spatially on the light emitting surface so that light from at least three different primary color phosphor emitters forms a mixture color by additive spatial juxtaposition; the light source including excitation means for exciting the phosphor emitters to emit visible light; the primary color visible light emitted from the light emitting surface being spatially separated at the light emitting surface; a transmissive liquid crystal cell, disposed to receive the primary color visible light from the light emitting surface, having a pair of transparent substrates for containing a light conducting liquid crystal material, and including a planar matrix of individually addressable light modulating pixels with associated modulator disposed on one of the transparent substrates; a voltage source connected to the transparent substrates for providing an electric field across the liquid crystal material; wherein the modulator modulates optical transmission of primary color visible light through each individually addressable light modulating pixel according to the image to be formed by the liquid crystal cell, in response to signals received from the voltage source; a lens array optically coupling the spatially separated primary color visible light from each of the plurality of phosphor emitters to a respective one of the light modulating pixels; the lens array being disposed between the light emitting surface and the transmissive liquid crystal cell, and not abutted against the modulator, each lens of the lens array having optical properties to collect substantially all of the primary color visible light from more than one of the phosphor emitters and to focus a real image thereof in respective light modulating pixels; and a image display device, disposed to receive the full color image from the transmissive liquid crystal cell, the image display device displaying the full color image, the image display device, including a light diffuser displaying the image so that a human observer may view the image from on-axis and off-axis viewing angles.

Claim 23

The full color transmissive liquid crystal display according to claim 18, wherein the liquid crystal material is a nematic liquid crystal material of a twisted configuration capable of causing a rotation of a polarization plane of the primary color visible light in response to the electric field applied across the nematic liquid crystal material; and further including a first linear polarizer disposed between the light emitting surface and the liquid crystal cell, for polarizing in a first polarization plane the primary color visible light emitted from the light emitting surface before it enters the liquid crystal cell; and a second linear polarizer disposed on a light emitting side of the liquid crystal cell for controlling the optical transmission of the primary color visible light emanating from the liquid crystal cell according to the rotation of the first polarization plane of the light from the cell.

Claim 24

The full color liquid crystal display according to claim 19, wherein the matrix of individually addressable light modulating pixels and the lens array are substantially the same size as, and in substantially aligned registration with, the light emitting surface of the light source so that each pixel of the matrix is in substantially aligned registration with a respective one of the plurality of primary color visible light emitters; and wherein the lens array has optical properties to collect substantially all of the primary color visible light from each emitter and to focus a real image thereof in the respectively aligned pixel.