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US 6,661,393 B2Granted
Scanned display with variation compensation
AssigneeMicrovision, Inc.
InventorsClarence T. Tegreene, John R. Lewis
Life of this patent
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AssigneeMicrovision, Inc.
InventorsClarence T. Tegreene, John R. Lewis
Estimating the term…
A display apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A light source emits light toward the scanning assembly such that the scanning assembly simultaneously scans more than one of the beams. The light source is positioned such that its beam illuminates a discrete region of the image field. The image may be formed from a set of “tiles” where a single sweep of the scanning assembly scans a plurality of beams simultaneously. Various approaches to controlling the intensity of the light to compensate for variations in light source response or optical system response, or to balance the response of a tiles system are described. Among these approaches are scaling data in a buffer, active multiplication, or control of a D/A converter.
A method of stabilizing light intensity in a scanning beam display having a light source, the scanning beam display including a scanning pattern that includes a first region where the light is available for viewing by a user and a second region where the light is not available for viewing by the user, the light beam being within the first region during a series of viewing intervals and being in the second region during a series of non-viewing intervals, comprising steps of:
A method of stabilizing light intensity in a scanning beam display having a light source, the scanning beam display including a scanning pattern that includes a first region where the light is available for viewing by a user, the light beam being within the first region during a series of viewing intervals, comprising steps of:
The method of the image signal includes data representing the desired intensity and wherein the step of adjusting the driving signal current in response to the determined deviation includes digitally multiplying the data by a correction factor.
Dependencies are inferred from the claim text.