Patent US6075513A successfully refreshed from Google Patents.
US6075513A
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Method and apparatus for automatically maintaining a predetermined image quality in a display system
Assignee: Nvidia Corp
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Filing: 1996-03-28
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Granted: 2000-06-13
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Expires: 2016-03-28
Abstract
Abstract A digital system provides command data to a display system during the display time period such that minimal image degradation occurs. The digital system includes a CPU coupled to a graphics controller coupled to a display system via a cable. The display system includes an intelligent display driver controller (IDDC), driver circuits, display screen, and possibly sensors. The IDDC operates on image data and instructs the driver circuits to display an image on the display screen. Operating condition changes measured by transducers may result in a degradation in image quality unless a response is made. The digital system may automatically respond to operating condition changes to maintain a predetermined image quality level. Alternatively a user's request may change the image quality. In either case the CPU is interrupted and it provides one or more control sets of command data interspersed within the image data transparently to the graphics controller. The IDDC receives one or more control sets from the graphics controller and may store a control set to adjust the control over the driver circuits thereby preserving the image quality. Changes to hardware and software are minimized to reduce the costs of adding these improvements.
Inventors
- 👤 Dayakar C. Reddy
- 👤 Modugu V. Reddy
- 👤 Sriram Ramamurthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:41
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/003; G09G5/006; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G2320/00; G09G2320/04; G09G2320/041; G09G2370/00; G09G2370/04; G09G2370/045
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
301 words
A display system comprising: a host processor, for generating display information and for generating a plurality of control set data for controlling a display device in response to a measured parameter; a display controller, coupled to the host processor for receiving display information and for generating units of display data, the display controller including: means for transferring units of display data from the display controller to a display device; a replacing circuit coupled to the means for transferring, for automatically replacing units of display data with a plurality of sets of control data for transfer with the display data; a display device, including: a flat panel display, a display driver controller, for controlling operation of the flat panel display to display pixels on the display device represented by the display data, the display driver controller including: a digital memory coupled to the display device for storing a selected control data set having a predetermined effect upon the image quality; means for retrieving selected control data from the display data and modifying the control data set within the digital memory with the control data; and means for replicating at least one pixel corresponding to the at least one unit based on a value of a neighboring unit of display data within a single frame; wherein the display driver controller further comprises: at least one sensor for measuring a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon quality of the image; and means for selecting one of the plurality of control sets as a function of the measured at least one parameter, wherein the display driver controller individually and automatically selects particular corrected color levels corresponding to the precorrected color levels from the selected control set.
Claim 2
Dependent Claim
301 words
A display system comprising: a host processor, for generating display information and for generating a plurality of control set data for controlling a display device in response to a measured parameter; a display controller, coupled to the host processor for receiving display information and for generating units of display data, the display controller including: means for transferring units of display data from the display controller to a display device; a replacing circuit coupled to the means for transferring, for automatically replacing units of display data with a plurality of sets of control data for transfer with the display data; a display device, including: a flat panel display, a display driver controller, for controlling operation of the flat panel display to display pixels on the display device represented by the display data, the display driver controller including: a digital memory coupled to the display device for storing a selected control data set having a predetermined effect upon the image quality; means for retrieving selected control data from the display data and modifying the control data set within the digital memory with the control data; and means for replicating at least one pixel corresponding to the at least one unit based on a value of a neighboring unit of display data within a single frame; wherein the display driver controller further comprises: at least one sensor for measuring a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon quality of the image; and means for selecting one of the plurality of control sets as a function of the measured at least one parameter, wherein the display driver controller individually and automatically selects particular corrected color levels corresponding to the precorrected color levels from the selected control set.
Claim 3
Independent Claim
170 words
A method of transferring control data to a display device during a display time while maintaining image quality, the method comprising the steps of: sending a signature from a display controller to the display device during the display time as display data; sending at least one control data set from a display controller as display data to the display device during the display time; detecting, at the display device, the signature and control data set from within the display data; storing, in the display device a control data set for use in controlling image quality of the display; measuring, in the display device, a parameter of the display; selecting, in the display device, a portion of the control data set to control image quality of the display in response to the measured parameter; and replacing the control data set portion of the display data by replicating at least one pixel data based on a value of neighboring pixel data within a single frame during the sending of control set data.
Claim 4
Independent Claim
170 words
A method of transferring control data to a display device during a display time while maintaining image quality, the method comprising the steps of: sending a signature from a display controller to the display device during the display time as display data; sending at least one control data set from a display controller as display data to the display device during the display time; detecting, at the display device, the signature and control data set from within the display data; storing, in the display device a control data set for use in controlling image quality of the display; measuring, in the display device, a parameter of the display; selecting, in the display device, a portion of the control data set to control image quality of the display in response to the measured parameter; and replacing the control data set portion of the display data by replicating at least one pixel data based on a value of neighboring pixel data within a single frame during the sending of control set data.
Claim 5
Dependent Claim
302 words
A computer system comprising: a display device for displaying an image comprising a plurality of pixels, said display device including: a display driver controller and column and row pixel drivers coupled to the display driver controller, the display device for displaying an image comprising a plurality of pixels, at least one sensor for measuring a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon quality of the image, and a digital memory storing a plurality of control sets, each of the plurality of control sets corresponding to a particular value of the at least one parameter, each of the plurality of control sets including a plurality of corrected color levels, each of the plurality of corrected color levels being associated with a corresponding one of the plurality of possible color levels; and a display controller coupled by a set of signal lines to the display device, the signal lines configured to provide a plurality of precorrected color levels from the display controller to the display driver controller, each of the plurality of precorrected color levels indicating one of a plurality of possible color levels for a corresponding one of the plurality of pixels of the image; wherein the display driver controller selects one of the plurality of control sets as a function of the measured at least one parameter, wherein the display driver controller individually and automatically selects particular corrected color levels corresponding to the precorrected color levels from the selected control set, and wherein the display driver controller transmits the selected corrected color levels to the column and row pixel drivers for displaying the image, each of the selected corrected color levels corresponding to a respective one of the plurality of pixels of the image.
Claim 6
Dependent Claim
302 words
A computer system comprising: a display device for displaying an image comprising a plurality of pixels, said display device including: a display driver controller and column and row pixel drivers coupled to the display driver controller, the display device for displaying an image comprising a plurality of pixels, at least one sensor for measuring a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon quality of the image, and a digital memory storing a plurality of control sets, each of the plurality of control sets corresponding to a particular value of the at least one parameter, each of the plurality of control sets including a plurality of corrected color levels, each of the plurality of corrected color levels being associated with a corresponding one of the plurality of possible color levels; and a display controller coupled by a set of signal lines to the display device, the signal lines configured to provide a plurality of precorrected color levels from the display controller to the display driver controller, each of the plurality of precorrected color levels indicating one of a plurality of possible color levels for a corresponding one of the plurality of pixels of the image; wherein the display driver controller selects one of the plurality of control sets as a function of the measured at least one parameter, wherein the display driver controller individually and automatically selects particular corrected color levels corresponding to the precorrected color levels from the selected control set, and wherein the display driver controller transmits the selected corrected color levels to the column and row pixel drivers for displaying the image, each of the selected corrected color levels corresponding to a respective one of the plurality of pixels of the image.
Claim 7
Dependent Claim
67 words
The computer system according to claim 3, further comprising: an interrupt signal line coupling the display controller to the display device, wherein an interrupt signal is transmitted to the display controller when a value of the at least one parameter changes by a predetermined threshold amount, and wherein the display driver controller selects one of the plurality of control sets only after the interrupt signal is transmitted.
Claim 8
Dependent Claim
20 words
The system according to claim 4, wherein the digital memory includes a random access memory coupled to the display device.
Claim 9
Dependent Claim
114 words
The system according to claim 3, wherein the display controller includes: a graphics controller for controlling a process of providing the plurality of precorrected color levels from the display controller to the display driver controller, each of the plurality of precorrected color levels indicating one of the plurality of possible color levels for the corresponding one of the plurality of pixels of the image; and means for substituting at least one of the plurality of precorrected color levels for a corresponding one of the plurality of pixels of the image with control data, wherein the display driver controller selects one of the plurality of control sets as a further function of the control data.
Claim 10
Dependent Claim
56 words
The system according to claim 6, wherein the display driver controller substitutes the substituted at least one of the plurality of precorrected color levels for the corresponding one of the plurality of pixels with a precorrected color level of a particular one of the plurality of pixels adjacent the corresponding one of the plurality of pixels.
Claim 11
Dependent Claim
75 words
The system according to claim 3, wherein the control signal is coupled to the display device by a first and second set of signal cables, wherein the display controller provides image data over the first set of signal cables, wherein the display controller provides control data over the second set of control cables, and wherein the display driver controller selects one of the plurality of control sets as a further function of the control data.
Claim 12
Dependent Claim
17 words
The system according to claim 3, wherein the digital memory is coupled to the display driver controller.
Claim 13
Dependent Claim
14 words
The system according to claim 3, wherein the digital memory includes a nonvolatile memory.
Claim 14
Dependent Claim
14 words
The system according to claim 3, wherein the digital memory includes a volatile memory.
Claim 15
Dependent Claim
27 words
The system according to claim 3, wherein the color levels include a first level of red, a second level of green, and a third level of blue.
Claim 16
Dependent Claim
17 words
The system according to claim 3, wherein the display controller is physically separated from the display device.
Claim 17
Dependent Claim
16 words
The system according to claim 3, wherein the at least one sensor measures an operating temperature.
Claim 18
Dependent Claim
17 words
The system according to claim 3, wherein the at least one sensor measures a display voltage linearity.
Claim 19
Dependent Claim
17 words
The system according to claim 3, wherein the at least one sensor measures a power supply voltage.
Claim 20
Dependent Claim
24 words
The system according to claim 3, wherein the display device is a monitor, and the at least one sensor is mounted to the monitor.
Claim 21
Dependent Claim
17 words
The system according to claim 3, wherein the least one sensor is connected to the display controller.
Claim 22
Independent Claim
284 words
A method for maintaining a quality of an image displayed on a display device having a display driver controller and column and row pixel drivers coupled to the display driver controller, the method comprising the steps of: measuring in the display device, a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon the quality of the image; providing a plurality of precorrected color levels from a display controller over a set of signal lines to the display driver controller, each of the plurality of precorrected color levels indicating one of a plurality of possible color levels for a corresponding one of a plurality of pixels of the image; storing a plurality of control sets within the display driver controller, each of the plurality of control sets corresponding to a particular value of the at least one parameter, each of the plurality of control sets including a plurality of corrected color levels, each of the plurality of corrected color levels being associated with a corresponding one of the plurality of possible color levels; selecting one of the plurality of control sets as a function of the measured at least one parameter; individually and automatically selecting particular corrected color levels corresponding to the precorrected color levels from the selected control set; transmitting the selected corrected color levels to the column and row pixel drivers for displaying the image, each of the selected corrected color levels corresponding to a respective one of the plurality of pixels of the image; and displaying each of the selected corrected color levels corresponding to the respective one of the plurality of pixels of the image.
Claim 23
Independent Claim
284 words
A method for maintaining a quality of an image displayed on a display device having a display driver controller and column and row pixel drivers coupled to the display driver controller, the method comprising the steps of: measuring in the display device, a value of at least one parameter indicative of an operating condition of the display device, the at least one parameter having a predetermined effect upon the quality of the image; providing a plurality of precorrected color levels from a display controller over a set of signal lines to the display driver controller, each of the plurality of precorrected color levels indicating one of a plurality of possible color levels for a corresponding one of a plurality of pixels of the image; storing a plurality of control sets within the display driver controller, each of the plurality of control sets corresponding to a particular value of the at least one parameter, each of the plurality of control sets including a plurality of corrected color levels, each of the plurality of corrected color levels being associated with a corresponding one of the plurality of possible color levels; selecting one of the plurality of control sets as a function of the measured at least one parameter; individually and automatically selecting particular corrected color levels corresponding to the precorrected color levels from the selected control set; transmitting the selected corrected color levels to the column and row pixel drivers for displaying the image, each of the selected corrected color levels corresponding to a respective one of the plurality of pixels of the image; and displaying each of the selected corrected color levels corresponding to the respective one of the plurality of pixels of the image.
References Cited (Backward Citations)
US3789386A
Cited
US3955187A
Cited
US4023165A
Cited
US4165506A
Cited
US4390874A
Cited
US4873516A
Cited
US4990904A
Cited
US5010326A
Cited
US5398042A
Cited
US5251301A
Cited
US5027111A
Cited
US5033822A
Cited
US5155477A
Cited
US5029982A
Cited
US5088806A
Cited
US5570436A
Cited
US5550556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-13 | 2003-12-13 | 2004-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-13 | 2007-12-13 | 2008-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-13 | 2011-12-13 | 2012-06-13 | $7700.00 | Window Closed / Lapsed |