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US 12,681,296 B2Granted
Pixel intensity modulation using modifying gain values
AssigneeMagic Leap, Inc.
InventorsRichard Stephen Johnston, Brian T. Schowengerdt
Life of this patent
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Abstract
A visual perception device has a look-up table stored in a laser driver chip. The look-up table includes relational gain data to compensate for brighter areas of a laser pattern wherein pixels are located more closely than areas where the pixels are further apart and to compensate for differences in intensity of individual pixels when the intensities of pixels are altered due to design characteristics of an eye piece.
Claims34
A visual perception device comprising:
- a beam modulator, wherein the beam modulator includes:
- a video data digital-to-analog converter (VDAC) that receives video data including multiple pixels;
- a gain digital-to-analog converter (GDAC) having an input for receiving a gain setting and an output connected to the VDAC to set a gain on the VDAC;
- a pixel counter that counts the pixels, so that each time a new pixel is received by the VDAC, the pixel counter increases a previously stored number by one so that the number tracks the pixels on a per-pixel basis;
- and
- a multiplier connected to relational data to modify, based on a gain value in the relational data corresponding to the number tracked by the pixel counter, an output of the VDAC on a per-pixel basis determined by the gain value in the relational data corresponding to the number tracked by the pixel counter.
3 more elements
A method of creating an image comprising:
- receiving video data with a video data digital-to-analog converter (VDAC) of a beam modulator including multiple pixels;
- setting a gain on the VDAC with a gain digital-to-analog converter (GDAC) having an input for receiving a gain setting and an output connected to the VDAC to set the gain on the VDAC of the beam modulator;
- and
- modifying, with a multiplier connected to relational data, based on a gain value pixels in relational data corresponding to the number tracked by the pixel counter that counts the pixels, so that each time a new pixel is received by the VDAC, the pixel counter increases a previously stored number by one so that the number tracks the pixels on a per-pixel basis, an output of the VDAC on a per-pixel basis determined by the gain value in the relational data corresponding to the number tracked by the pixel counter.
1 more element
Dependencies are inferred from the claim text.