# US 9,438,896 B2 · Method for driving 3D binocular eyewear from standard video stream > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,896 B2 - Document ID: US9438896B2 - Status: Granted - Kind: B2 - Application number: 12/945,976 - Filed: 2010-11-15 - Published: 2011-07-28 - Granted: 2016-09-06 - Earliest claimed: 2009-11-13 - Assignees: Kopin Corporation - Applicants: Frederick P. Herrmann - Inventors: Frederick P. Herrmann - Web page: https://patentgrep.com/patent/US9438896B2 ## CPC - H04N 13/344: with head-mounted left-right displays - H04N 13/398: Synchronisation thereof; Control thereof - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A video eyewear device in which parallel side-by-side video signals are driven as analog signals to the left and right displays, with timing controlled by a common sampling clock. A left display sampling clock burst occurs during an active video period and the right display burst occurs during the same portion of the active video period. ## Claims ### Claim 1 A video eyewear device comprising: a head-mounted eyewear, configured to host: a receiver, for receiving a digital video stream having encoded therein three-dimensional video information; a left display; a right display; a left video driver and a right video driver, each coupled to the receiver for receiving the digital video stream, and providing a left video signal to the left display and a right video signal to the right display; and a timing controller, for generating a pixel sampling clock signal to be applied to the left video signal at the left display and the right video signal at the right display, such that an active pixel sampling clock period for the left video driver occurs during the same time as an active pixel sampling clock period for the right video driver. ### Claim 2 (depends on 1) The device of claim 1 additionally comprising: a left and right digital scaler connected to receive a respective left and right digital video stream, to apply a horizontal scale factor to the left and right digital video streams, and to provide respective inputs to the left and right video drivers. ### Claim 3 (depends on 2) The device of claim 2 additionally comprising: a line buffer memory coupled to an input video stream, and to provide the left and right digital video streams. ### Claim 4 (depends on 3) The device of claim 3 wherein a scale factor applied by the digital scalers depends on a number of pixels in an horizontal scan line of at least one of the left and right displays and one half a number of pixels in a horizontal scan line of the input video stream. ### Claim 5 (depends on 2) The device of claim 2 wherein the left and right digital scalers use linear interpolation. ### Claim 6 (depends on 2) The device of claim 2 wherein the input video stream includes at least three channel color video, and the digital scalers are applied to the pixels for a given color channel independently of the other color channels. ### Claim 7 (depends on 1) The device of claim 1 further comprising: a pixel position shifter, for shifting at least one of the digital video signals at the left video driver and the digital video signals at the right video driver with respect to one another. ### Claim 8 (depends on 1) The device of claim 1 further comprising: a pixel position shifter coupled to the left and right video drivers for shifting at least one of left or right digital video signals to control either the point of convergence or inter pupil distance. ### Claim 9 A video eyewear device comprising: a head-mounted eyewear, configured to host: a receiver, for receiving a digital video stream having encoded therein three-dimensional video information; left and right displays; a left video driver and a right video driver, each coupled to the receiver for receiving the digital video stream, and providing a left video signal to the left display and a right video signal to right display; and a pixel position shifter, for shifting at least one of the left or right digital video signals with respect to one another. ### Claim 10 (depends on 9) The device of claim 9 wherein the pixel position shifter accepts an input signal indicating adjustment to at least one of a desired Interpupilary Distance (IPD) or point of convergence. ### Claim 11 A method of driving 3-dimensional binocular eyewear from a standard video stream, the method comprising: at a subject 3-dimensional binocular eyewear having a left display and a right display: receiving an input digital video stream having encoded therein three-dimensional video information; from the received digital video stream, providing a left video signal to the left display and a right video signal to the right display said providing the left video signal to the left display being by a left video driver and providing right video signal to the right display being by a right video driver; and causing an active pixel sampling clock period associated with the left video driver to occur during the same time as an active pixel sampling clock period associated with the right video driver. ### Claim 12 (depends on 11) The method of claim 11 further comprising: applying a horizontal scale factor to a left and right digital video streams using a left and right digital scaler, respectively, and providing respective inputs to the left and right video drivers. ### Claim 13 (depends on 12) The method of claim 12 further comprising: buffering an input video stream using a line buffer memory coupled to the input video stream, and providing the left and right digital video streams from the line buffer memory. ### Claim 14 (depends on 13) The method of claim 13 wherein applying the horizontal scale factor using the digital scalers depends on a number of pixels in a horizontal scan line of at least one of the left and right displays and one half a number of pixels in a horizontal scan line of the input video stream. ### Claim 15 (depends on 12) The method of claim 12 wherein applying the horizontal scale factor using the digital scalers the left and right digital scalers use linear interpolation. ### Claim 16 (depends on 12) The method of claim 12 wherein the input video stream includes at least three channel color video, and applying the horizontal scale factor using the digital scalers is applied to the pixels for a given color channel independently of the other color channels. ### Claim 17 (depends on 11) The method of claim 11 further comprising: shifting with respect to one another at least one of the digital video signals at the left video driver and the digital video signals at the right video driver, said shifting using a pixel position shifter. ### Claim 18 (depends on 11) The method of claim 11 further comprising: shifting with respect to one another at least one of the digital video signals at the left video driver and the digital video signals at the right video driver, said shifting controlling either the point of convergence or inter pupil distance using a pixel position shifter. ### Claim 19 A method of driving 3-dimensional binocular eyewear from a standard video stream, the method comprising: at a 3-dimensional binocular eyewear, receiving a digital video stream having encoded therein three-dimensional video information, said eyewear having a left display and a right display; using a left video driver and right video driver, receiving the digital video stream and providing a left video signal to the left display and a right video signal to the right display; and shifting with respect to one another at least one of the digital video signals at the left video driver and the digital video signals at the right video driver, said shifting using a pixel position shifter. ### Claim 20 (depends on 19) The method of claim 19 wherein the shifting using the pixel position shifter accepts an input signal indicating adjustment to at least one of a desired Interpupillary Distance (IPD) or point of convergence.