Method and apparatus for detecting flicker in an LCD image
AssigneeGenesis Microchip Inc.
InventorsChe Ming Wu, Vincent Wang, Jih Hsien Soong
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Abstract
A method, system and apparatus for detecting a sub-pixel pair susceptible of producing a flicker event in an image from a video signal source displayed on a liquid crystal display (LCD) unit is described. A two dimensional flicker pattern analysis is performed on a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first next sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second current sub-pixel.
Claims43
A flicker pattern detector coupled to a video signal source suitable for detecting a sub-pixel pair susceptible to producing a flicker event in an image displayed on a liquid crystal display (LCD) unit, comprising:
- a two dimensional flicker pattern analyzer arranged to perform a two dimensional flicker pattern analysis on a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second previous sub-pixel, wherein the two dimensional flicker pattern analyzer includes,
- a first storage device suitable for storing the first plurality of sub-pixels,
- a second storage device coupled to the first storage device suitably arranged to store the first current sub-pixel,
- a third storage device arranged to store a the second current sub-pixel, and
- a comparator unit coupled to the first storage device, the second storage device and the third storage device arranged to,
- perform a two dimensional compare operation, and
- update a final flicker frame score based upon the compare operation indicative of the susceptibility of producing a flicker event in an image displayed on a liquid crystal display (LCD) unit.
A method for detecting a sub-pixel pair susceptible of producing a flicker event in an image from a video signal source displayed on a liquid crystal display (LCD) unit, comprising:
- performing a two dimensional flicker pattern analysis based upon a difference in Δtransparency/Δvoltage for selected sub-pixel pairs of a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second previous sub-pixel.
A method for detecting a sub-pixel pair susceptible of producing a flicker event in an image from a video source displayed on a LCD unit comprising:
- performing a two dimensional flicker pattern analysis based upon a difference in Δtransparency/Δvoltage for selected sub-pixel pairs of a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frame line and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received in real time from the video signal source that includes a second current sub-pixel and a second previous sub-pixel.
A method for detecting a sub-pixel pair susceptible of producing a flicker event in an image from a video signal source displayed on a liquid crystal display (LCD) unit, comprising:
- performing a two dimensional flicker pattern analysis on a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second previous sub-pixel
- storing the first plurality of sub-pixels in a first storage device;
- storing the first current sub-pixel in a second storage device coupled to the first storage device;
- storing the second current sub-pixel in a third storage device
- comparing the first current sub-pixel to the first previous sub-pixel;
- comparing the first current sub-pixel to the second current sub-pixel;
- comparing the second current sub-pixel to the second previous sub-pixel;
- comparing the second previous sub-pixel to the first previous sub-pixel;
- and
- updating a final flicker frame score based upon the compare operation indicative of the susceptibility of producing a flicker event in an image displayed on a liquid crystal display (LCD) unit.
Computer program product for enabling a computer to perform a method for detecting a sub-pixel pair susceptible of producing a flicker event in an image from a video signal source displayed on a liquid crystal display (LCD) unit, comprising:
- computer code for performing a two dimensional flicker pattern analysis on a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second previous sub-pixel;
- computer code for storing the first plurality of sub-pixels in a first storage device;
- computer code for storing the first current sub-pixel in a second storage device coupled to the first storage device;
- computer code for storing the second current sub-pixel in a third storage device
- computer code for comparing the first current sub-pixel to the first previous sub-pixel;
- computer code for comparing the first current sub-pixel to the second current sub-pixel;
- computer code for comparing the second current sub-pixel to the second previous sub-pixel;
- computer code for comparing the second previous sub-pixel to the first previous sub-pixel;
- computer code for updating a final flicker frame score based upon the compare operation indicative of the susceptibility of producing a flicker event in an image displayed on a liquid crystal display (LCD) unit;
- and
- computer readable medium for storing the computer code.
A flicker pattern detector coupled to a video signal source suitable for detecting a sub-pixel pair susceptible to producing a flicker event in an image displayed on a liquid crystal display (LCD) unit, comprising:
- a two dimensional flicker pattern analyzer arranged to perform a two dimensional flicker pattern analysis based upon a difference in Δtransparency/Δvoltage for selected sub-pixel pairs of a selected group of sub-pixels some of which are included in a first plurality of sub-pixels that includes a first current sub-pixel and a first previous sub-pixel included in a first video frameline and a remainder of which are included in a second plurality of sub-pixels included in a second video frameline that is received, in real time, from the video signal source that includes a second current sub-pixel and a second previous sub-pixel.
Dependencies are inferred from the claim text.