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US 6,727,864 B1Granted
Method and apparatus for an optical function generator for seamless tiled displays
AssigneeHoneywell International Inc.
InventorsMichael Johnson, Chung-Jen Chen
Life of this patent
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Abstract
Producing seamless tiled images from multiple displays includes measuring a luminance profile of each of the displays, computing a desired luminance profile for each of the displays, and determining a spatial gradient profile of each of the displays based on the measured luminance profile and the computed desired luminance profile. The determined spatial gradient profile is applied to a spatial filter to be inserted into each of the displays to produce the seamless tiled display image.
Claims72
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising:
- measuring a luminance profile of each of the multiple displays used in producing the seamless tiled display image;
- computing a desired luminance profile of each of the multiple displays producing the seamless tiled display image, wherein the desired luminance profile includes a fall-off luminance profile computed using a mathematical function for outside a center region of the seamless tiled display image for each display;
- and
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays.
1 more element
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising:
- using an electronic camera to obtain an electronic image pattern for each of the multiple displays;
- normalizing the electronic camera performance for each of the multiple displays;
- removing the electronic camera inherent distortion for each of the multiple displays to measure the luminance profile of each of the multiple displays;
- computing a desired luminance profile by selecting a reference luminance (Lc) from each of the multiple displays for a center region of the seamless tiled display image, and computing a fall-off luminance profile for outside the center region for each of the multiple displays using a mathematical function;
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays;
- applying the desired spatial gradient profile to a spatial filter to be applied to each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays;
- and
- disposing the spatial filter including the determined spatial gradient profile in an image formation path of each of the multiple displays to produce the seamless tiled display image from the multiple displays.
5 more elements
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising:
- using an electronic camera to obtain an electronic image pattern for each of the multiple displays;
- normalizing the electronic camera performance for each of the multiple displays;
- removing the electronic camera inherent distortion for each of the multiple displays to measure the luminance profile of each of the multiple displays;
- computing a desired luminance profile of each of the multiple displays producing the seamless tiled display image;
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays, wherein the spatial gradient profile is determined using the equation
- Spatial Gradient Profile (x,y)=Desired luminance profile (x,y) [Operator] Measured Luminance Profile (x,y);
- computing an overflow spatial gradient profile based on
- Overflow Spatial Gradient Profile (x,y)=Determined Spatial Gradient Profile (x,y) [Times] a Predetermined Tolerance Margin;
- correcting the overflow spatial gradient profile by an electronics calibration to obtain a desired spatial gradient profile;
- applying the desired spatial gradient profile to a spatial filter to be applied to each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays;
- and
- disposing the spatial filter including the determined spatial gradient profile in an image formation path of each of the multiple displays to produce the seamless tiled display image from the multiple displays.
9 more elements
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising
- using an electronic camera to obtain an electronic image pattern for each of the multiple displays;
- normalizing the electronic camera performance for each of the multiple displays;
- removing the electronic camera inherent distortion for each of the multiple displays to measure the luminance profile of each of the multiple displays;
- computing a desired luminance profile of each of the multiple displays producing the seamless tiled display image;
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays;
- applying the determined spatial gradient profile to a spatial filter to be applied to each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays;
- and
- disposing the spatial filter including the determined spatial gradient profile in an image formation path of each of the multiple displays to produce the seamless tiled display image from the multiple displays, wherein disposing the spatial filter comprises incorporating the spatial filter into a holographic film for bending the light toward other spatial regions without a loss of a total light intensity in each of the projectors.
5 more elements
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising:
- using an electronic camera to obtain an electronic image pattern for each of the multiple displays;
- normalizing the electronic camera performance for each of the multiple displays;
- removing the electronic camera inherent distortion for each of the multiple displays to measure the luminance profile of each of the multiple displays;
- computing a desired luminance profile of each of the multiple displays producing the seamless tiled display image;
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays;
- applying the determined spatial gradient profile to a spatial filter to be applied to each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays, wherein the spatial filter is a transmissive medium, wherein the transmissive medium is a monochrome filter tuned for a specific color in the light;
- and
- disposing the spatial filter including the determined spatial gradient profile in an image formation path of each of the multiple displays to produce the seamless tiled display image from the multiple displays.
5 more elements
A display system for producing a seamless tiled display image from multiple discrete images, comprising:
- multiple displays for displaying each of the multiple discrete images separately onto the display screen, the multiple displays displaying the multiple discrete images such that at least one of the multiple discrete images partially overlaps with another of the at least one multiple discrete images;
- and
- a spatial filter, disposed in each of the multiple displays, to produce the seamless tiled display image from the multiple overlapping discrete images, wherein the spatial filter modulates a light based on a determined spatial gradient profile of each of the multiple displays, wherein the determined spatial gradient profile is based on a measured luminance profile of each of the multiple displays and a computed desired luminance profile for each of the multiple displays, respectively, wherein the desired color profile includes a fall-off luminance profile, computed using a mathematical function, for outside a center region of the seamless tiled display image for each display.
A method of producing a seamless tiled display image from multiple overlapping discrete images displayed by multiple displays, comprising:
- using an electronic camera to obtain an electronic image pattern for each of the multiple displays;
- normalizing the electronic camera performance for each of the multiple displays;
- removing the electronic camera inherent distortion for each of the multiple displays to measure the luminance profile of each of the multiple displays;
- computing a desired luminance profile of each of the multiple displays producing the seamless tiled display image;
- determining a spatial gradient profile of each of the multiple displays based on the measured luminance profile and the computed desired luminance profile of each of the multiple displays, respectively, to modulate a light to produce a seamless tiled display image from the multiple displays;
- applying the determined spatial gradient profile to a spatial filter to be applied to each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays, wherein the spatial filter is an electronic shutter having a spatial gray shade capability;
- and
- disposing the spatial filter including the determined spatial gradient profile in an image formation path of each of the multiple displays to produce the seamless tiled display image from the multiple displays.
5 more elements
A method of producing a seamless tiled display image from multiple displays, comprising:
- measuring a color profile of each of the multiple displays used in producing the seamless tiled display image;
- computing a desired color profile for each of the multiple displays producing the seamless tiled display image, wherein the desired color profile includes a fall-off luminance profile, computed using a mathematical function, for outside a center region of the seamless tiled display image for each display;
- and
- determining a spatial gradient profile of each of the multiple displays based on the measured color profile and the computed desired color profile of the each of the multiple displays, respectively, to produce a seamless tiled display image from the multiple displays.
1 more element
A display system for producing a seamless tiled display image from multiple discrete images, comprising:
- multiple displays for displaying each of the multiple discrete images separately onto the display screen, the multiple displays displaying the multiple discrete images such that at least one of the multiple discrete images partially overlaps with another of the at least one multiple discrete images;
- and
- a spatial filter, disposed in each of the multiple displays, to produce the seamless tiled display image from the multiple overlapping discrete images, wherein the spatial filter modulates a light based on a determined spatial gradient profile of each of the multiple displays, wherein the determined spatial gradient profile is based on a measured luminance profile of each of the multiple displays and a computed desired luminance profile for each of the multiple displays, respectively, wherein the spatial filter is a transmissive medium, wherein the transmissive medium is a monochrome filter tuned for a specific color in the light.
A display system for producing a seamless tiled display image from multiple discrete images, comprising:
- multiple displays for displaying each of the multiple discrete images separately onto the display screen, the multiple displays displaying the multiple discrete images such that at least one of the multiple discrete images partially overlaps with another of the at least one multiple discrete images;
- and
- a spatial filter, disposed in each of the multiple displays, to produce the seamless tiled display image from the multiple overlapping discrete images, wherein the spatial filter modulates a light based on a determined spatial gradient profile of each of the multiple displays, wherein the determined spatial gradient profile is based on a measured luminance profile of each of the multiple displays and a computed desired luminance profile for each of the multiple displays, respectively, wherein the spatial filter modulates the light to prevent stray light from coming from each of the projectors.
A display system for producing a seamless tiled display image from multiple discrete images, comprising:
- multiple displays for displaying each of the multiple discrete images separately onto the display screen, the multiple displays displaying the multiple discrete images such that at least one of the multiple discrete images partially overlaps with another of the at least one multiple discrete images;
- and
- a spatial filter, disposed in each of the multiple displays, to produce the seamless tiled display image from the multiple overlapping discrete images, wherein the spatial filter modulates a light based on a determined spatial gradient profile of each of the multiple displays, wherein the determined spatial gradient profile is based on a measured luminance profile of each of the multiple displays and a computed desired luminance profile for each of the multiple displays, respectively, and wherein the computed desired luminance comprises selecting a reference luminance from each of the multiple displays for a center region of the seamless tiled display image, and computing a fall-off luminance profile for outside the center region for each of the multiple displays using a mathematical function.
Dependencies are inferred from the claim text.