Scanned display with pinch, timing, and distortion correction
First Claim
1. A method for use in a scanning beam display of producing an image in response to image data that represent desired pixels, each desired pixel having a respective desired pixel location, comprising the steps of:
- emitting a beam of light;
resonantly scanning the light along a first axis at a first frequency through a series of actual pixel locations;
for each actual pixel location identifying a plurality of desired pixel locations corresponding to the actual pixel location;
determining for each of the identified pluralities of desired pixel locations a corresponding set of weighted data as a function of the first frequency and the image data for the respective desired pixel location; and
modulating the beam of light according to the weighted data, when the beam of light is aligned with the corresponding actual pixel location.
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Accused Products
Abstract
A display apparatus includes an image source that scans about two axes. To offset motion about a first of the axes during sweeps about the second axis, the apparatus includes a structure to produce offsetting motion about the first axis at a scanning rate equal to the twice-scanning rate about the second axis. The offsetting scan can be a ramp or other motion. In one embodiment, the offsetting motion is a resonant sinusoid. The offsetting motion may be produced by an auxiliary scanner such as a mechanical scanner, a piezoelectric scanner, a MEMs scanner or other scanner. Because the offsetting motion is very small, the auxiliary scanner can function with a very small scan angle.
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Citations
14 Claims
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1. A method for use in a scanning beam display of producing an image in response to image data that represent desired pixels, each desired pixel having a respective desired pixel location, comprising the steps of:
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emitting a beam of light; resonantly scanning the light along a first axis at a first frequency through a series of actual pixel locations; for each actual pixel location identifying a plurality of desired pixel locations corresponding to the actual pixel location; determining for each of the identified pluralities of desired pixel locations a corresponding set of weighted data as a function of the first frequency and the image data for the respective desired pixel location; and modulating the beam of light according to the weighted data, when the beam of light is aligned with the corresponding actual pixel location. - View Dependent Claims (2, 3, 4, 5)
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6. A method of producing an image for viewing in response to a set of data representing pixels of an image, each pixel having a respective pixel location in a two dimensional matrix, comprising the steps of:
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storing the data representing the pixels in a memory device; emitting a light beam from a first position; resonantly scanning the emitted light beam about at least one axis in a selected two dimensional scan pattern; identifying a series of substantially equally spaced pixel times each corresponding to a respective location in the two dimensional scan pattern; and for each of the identified substantially equally spaced pixel times, determining a corresponding weighted average of a plurality of the data; and at each identified substantially equally spaced pixel times, modulating the light beam according to the determined corresponding weighted average. - View Dependent Claims (7, 8, 9, 10)
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11. A method of producing a resonantly scanned image, comprising the steps of:
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storing data representing a rectilinear set of pixels in a buffer; for each line in the image, clocking the stored data out of the buffer at a set of equally spaced clocking times; for each of the clocking times determining a location in a resonant scanning pattern; and for each of the clocking times, calculating a pixel intensity that is a weighted average of a plurality of the clocked out stored data; and substantially at each of the clocking times, emitting a beam of light that is modulated according to the corresponding calculated pixel intensity. - View Dependent Claims (12, 13, 14)
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Specification