Scanned display with plurality of scanning assemblies
First Claim
1. A display device responsive to an image signal to produce a displayed image having first and second portions in respective first and second immediately adjacent image fields, comprising:
- a first light source responsive to a first input signal to emit a first beam of modulated light along a first optical path;
a first scanning assembly positioned to receive the first beam of light and configured to scan the first beam of light into the first image field;
a second light source responsive to a second input signal to emit a second beam of modulated light along a second optical path;
a second scanning assembly different from the first scanning assembly, the second scanning assembly being positioned to receive the second beam of light and configured to scan the second beam of light into the second image field; and
an electronic controller having a signal input that receives the image signal, the electronic controller being responsive to the image signal to produce the first and second input signals.
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Accused Products
Abstract
A display apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A plurality of light sources emit light from spaced apart locations toward the scanning assembly such that the scanning assembly simultaneously scans more than one of the beams. The scanning assembly includes a plurality of mirrors that sweep their respective beams through respective regions of an image field. The regions are immediately adjacent so that an overall image is produced by “tiling” of the regions. Because sweeps of the scanning assembly scan a plurality of tiles simultaneously the resolution and/or field of view of a display for a given scan angle and mirror size is increased relative to a single mirror sweeping a single beam. In alternative embodiments, tiling is used for imaging. Also, various approaches to controlling the frequency responses of the various scanners are described, including active control of MEMs scanners and passive frequency tuning.
18 Citations
27 Claims
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1. A display device responsive to an image signal to produce a displayed image having first and second portions in respective first and second immediately adjacent image fields, comprising:
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a first light source responsive to a first input signal to emit a first beam of modulated light along a first optical path;
a first scanning assembly positioned to receive the first beam of light and configured to scan the first beam of light into the first image field;
a second light source responsive to a second input signal to emit a second beam of modulated light along a second optical path;
a second scanning assembly different from the first scanning assembly, the second scanning assembly being positioned to receive the second beam of light and configured to scan the second beam of light into the second image field; and
an electronic controller having a signal input that receives the image signal, the electronic controller being responsive to the image signal to produce the first and second input signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tiled scanning display responsive to an image signal to produce an image including first and second image portions, comprising:
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a first scanning light source responsive to a first input signal to scan a first modulated beam of light through a first scan pattern to produce a first image portion;
a second scanning light source responsive to a second input signal to scan a second modulated beam of light through a second scan pattern that is substantially non-overlapping with respect to the first scan pattern in the image field to produce a second image portion; and
an electronic controller having a signal input that receives the image signal, a first signal output coupled to the first scanning light source and a second signal output coupled to the second scanning light source, the electronic controller being responsive to the image signal to produce the first and second input signals. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27)
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15. A method of producing a displayed image, comprising:
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emitting a first modulated beam of light with a modulation corresponding to a first portion of the image;
scanning the first beam of light through a first scan pattern with a first scanning)assembly;
emitting a second modulated beam of light with a modulation corresponding to a second portion of the image;
scanning the second beam of light through a second scan pattern with a second scanning assembly different from the first; and
orienting the first and second scanning assemblies in a manner that defines the first and second scan patterns as substantially adjacent and substantially non-overlapping parts of an image field.
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23. An imaging apparatus, comprising:
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a first scanning assembly configured to receive a incident light at a first set of incident angles, the first scanning assembly being operative to scan through a first scanning pattern that is a function of the first set of incident angles to direct the received light along a first path;
a first detector assembly oriented to detect light directed along the first path and operative to produce a first electrical signal indicative of the light energy detected from the first path;
a second scanning assembly configured to receive a incident light at a second set of incident angles, the second scanning assembly being operative to scan through a second scanning pattern that is a function of the second set of incident angles to direct light along a second path;
a second detector assembly oriented to detect light directed along the second path and operative to produce a second electrical signal indicative of the light energy detected from the second path; and
a control circuit having a first input coupled to the first detector and a second input coupled to the second detector, the control circuit being configured to produce an electronic representation of the light energy received from the first and second scanning assemblies.
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Specification