Automatic adjustment of color balance and other display parameters in digital displays
AssigneeApple Computer, Inc.
InventorsJames Everard, Wei Chen
Life of this patent
Estimating the term…
Abstract
Image data resulting from a digitizing process, for display of an image on a digital display device, is monitored by selectively storing the data in diagnostic registers. This data is analyzed, and used to track the performance of the digitizer on the basis of various operating parameters such as inter-channel balance, intra-channel balance, contrast, brightness, white point, image centering and data clock. A communication channel from the image source provides information regarding the content of the image data being monitored. Based upon the indicated content provided by the image source, the system automatically compensates for any detected error, to thereby maintain optimum performance.
Claims29
A digital image display system, comprising:
- an image source which generates an analog video signal containing information about plural constituent components of an image and a data signal which identifies the intended content of at least a portion of the image;
- a video digitizer which receives said analog video signal and produces a plurality of digital signals that respectively relate to said plural constituent components of the image;
- a digital display device which receives said digital signals and displays an image defined thereby;
- a plurality of registers which store values relating to the digital signals produced by said video digitizer that correspond to respective components of the image;
- and
- a controller which receives said data signal from said image source, controls said registers to store data values corresponding to the intended content of the image identified by said data signal, analyzes said stored values relative to said intended content, and controls said video digitizer to adjust at least one operating parameter thereof to cause the digital signals produced thereby to conform to said intended content.
A system for automatically adjusting operating parameters that pertain to the display of an image on a digital display device, comprising:
- a video digitizer which receives an analog video signal and produces a digital signal of an image to be displayed on a digital display device;
- a register which selectively stores values relating to the digital signal produced by said video digitizer;
- and
- a controller which receives data from an image source relating to the intended content of the values stored in said register, and controls said video digitizer to adjust at least one operating parameter thereof to cause the digital signal produced thereby to conform to said intended content.
A digital image display system, comprising:
- an image source which generates an analog video signal containing information about plural constituent components of an image;
- a video digitizer which receives said analog video signal and produces a plurality of digital signals that respectively relate to said plural constituent components of the image;
- a digital display device which receives said digital signals and displays an image defined thereby;
- a plurality of registers which selectively store values relating to the digital signals produced by said video digitizer;
- and
- a controller which receives data from said image source relating to the intended content of the values stored in said registers, and controls said video digitizer to adjust at least one operating parameter thereof to cause the digital signals produced thereby to conform to said intended content.
A method for automatically adjusting operating parameters that pertain to the display of an image on a digital display device, comprising the steps of:
- generating an analog video signal and a data signal which identifies the intended content of an image represented by said analog video signal;
- processing said analog video signal in accordance with a plurality of operating parameters to produce a digital signal that represents the image;
- selectively storing portions of said digital signal that correspond to designated locations within the image;
- processing the stored portions of the digital signal to determine their correspondence to the intended content identified by said data signal;
- and
- adjusting said operating parameters to provide a desired correspondence between the stored portions of the digital signal and the intended content at the designated locations.
A method for automatically adjusting operating parameters that pertain to the display of an image on a digital display device, comprising the steps of:
- generating an analog video signal that describes plural components of an image, and a data signal which identifies the intended content of the image represented by said analog video signal;
- processing said analog video signal in accordance with a plurality of operating parameters to produce a plurality of digital signals that respectively represent the plural components of the image;
- selectively storing portions of said digital signals that correspond to designated locations within the image;
- separately processing the stored portions of the digital signals for each of the plural components of the image to determine their correspondence to the intended content identified by said data signal;
- and
- adjusting operating parameters associated with each of the plural components of the image to provide a desired correspondence between the stored portions of the digital signals and the intended content at the designated locations for each of said plural components.
Dependencies are inferred from the claim text.