Method and apparatus for display calibration and control

• US 5,739,809 A
• Filed: 04/24/1996
• Issued: 04/14/1998
• Est. Priority Date: 06/27/1994
• Status: Expired due to Fees

• Current Assignee: Autodesk, Inc.
• Original Assignee: Radius, Inc. (Washington) (DXC Technology Company)
• Inventors: McLaughlin, Michael D., Signa, John C.
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US08/637,106
• Time in Patent Office: 720 Days
• Field of Search: 345/127, 345/145, 345/146, 345/150, 345/154, 345/904, 348/177, 348/178, 348/180, 348/189, 348/191, 348/734, 358/527, 358/531
• US Class Current: 345/594
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G09G 1/165 Details of a display terminal using a CRT, the details relating to the control arrangement of the display terminal and to the interfaces thereto details suitable for both CRT and flat panel G09G5/003; specific for a flat panel G09G3/2092
• CPC Class Codes: G09G 2320/06 Adjustment of display parameters
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 2320/08 Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 1/6052 Matching two or more picture signal generators or two or more picture reproducers
• CPC Class Codes: H04N 17/02 for colour television signals
• CPC Class Codes: H04N 17/04 for receivers
• CPC Class Codes: H04N 9/73 Colour balance circuits, e.g. white balance circuits or colour temperature control camera processing pipelines for colour balance H04N23/88
• CPC Class Codes: Y10S 345/904 Display with fail/safe testing feature
• CPC Class Codes: Y10S 715/97 Instrumentation and component modelling, e.g. interactive control panel

Abstract

A method and system for controlling a display. The system includes a processor programmed to control (and optionally also calibrate) a display in response to user selection of displayed virtual controls. Preferred embodiments of the system includes circuitry within the display device which operates under control of software in response to user-entered commands for adjustment of parameters of the display device. In preferred embodiments, the processor is programmed with software which stores multiple types of date (including display parameters measured during calibration and user-specified adjustment data indicative of differences between first and second sets of display control parameters) in separate data files; executes a locking operation which disables mechanical controls on the display device, periodically and automatically polls the status of the display, and automatically corrects any display parameter whose value differs from a desired value; displays two-dimensional controls with horizontal and vertical segments which a user can drag to vary display parameters such as brightness, contrast, and picture size or position; displays controls enabling a user conveniently to select either a maximum displayed intensity value of one primary color or a linear combination of two primary colors; and achieves excellent color matching between displayed and printed images by setting the display'"'"'s white point to a proofing level (by directly controlling display circuitry) and prompting the user to perform color matching with the display at the selected proofing white point. The invention also includes the methods performed by the described system.

Claims

1. A method for generating data for controlling a display, comprising the steps of:

generating a first set of display control data indicative of a set of current values of display parameters;

processing a second set of display control data indicative of the display parameters, and the first set of display control data, to generate adjustment data indicative of differences between corresponding data values in the first set and the second set; and

storing the adjustment data as a first file in a random access memory.

2. The method of claim 1, also including the step of:

storing the first set as a second file in the random access memory.

3. The method of claim 2, wherein the first set is profile data indicative of display parameters measured during a calibration operation.

4. The method of claim 2, wherein the second set is indicative of desired display parameters.

5. The method of claim 4, wherein the desired display parameters are user-specified display parameters.

6. The method of claim 4, wherein the desired display parameters are default display parameters.

7. A method for controlling a display, said display being interfaced with a processor programmed with display control software for controlling the display in response to signals from an input device interfaced with the processor, said method including the steps of:

displaying a virtual control for enabling a user to select a maximum displayed intensity value of a linear combination of two primary colors;

controlling a corresponding color characteristic of the display in response to user selection of the virtual control by manipulating the input device;

displaying a second virtual control for enabling a user to select a maximum displayed intensity value of one primary color; and

controlling a corresponding color characteristic of the display in response to user selection of the second virtual control by manipulating the input device.

8. A method for controlling a display to perform color matching at a proofing white point between displayed and printed images, said method comprising the steps of:

setting a white point of the display to a proofing white point level by directly controlling display circuitry within the display in response to selection of said proofing white point level;

displaying at least one virtual control prompting a user to control execution of the color matching with the display at said proofing white point level; and

executing said color matching in response to user selection of said at least one virtual control.

9. An image display system, comprising:

a display;

a random access memory;

a processing means coupled to the display means and the random access memory, wherein the processing means is coupled to receive a first set of display control data indicative of a set of display parameters and the processing means is programmed with;

software for generating a second set of display control data indicative of a set of current values of the display parameters;

software for generating adjustment data indicative of differences between corresponding data values in the first set and the second set; and

software for storing the adjustment data as a first file in the random access memory.

10. The system of claim 9, wherein the second set is profile data indicative of display parameters measured during a calibration operation, said system also including:

an input device coupled to the processing means; and

means for performing the calibration operation, and causing the processing means to generate said profile data, in response to a control signal from the input device.

11. An image display system, including:

a display;

an input device; and

a processor interfaced with the display and the input device, wherein the processor is programmed with display control software for controlling the display in response to signals from the input device, said display control software including;

software for displaying a virtual control for enabling a user to select a maximum displayed intensity value of a linear combination of two primary colors; and

software for controlling a corresponding color characteristic of the display in response to user selection of the virtual control by manipulating the input device;

software for displaying a second virtual control for enabling a user to select a maximum displayed intensity value of one primary color; and

software for controlling a corresponding color characteristic of the display in response to user selection of the second virtual control by manipulating the input device.

12. A system for performing color matching between displayed and printed images, said system including;

a display including display control circuitry;

an input device; and

a processor interfaced with the display and the input device, wherein the processor is programmed with display control software for controlling the display in response to signals from the input device, said display control software including;

software for setting a white point of the display to a proofing white point level by directly controlling the display control circuitry in response to selection of said proofing white point level;

software for displaying at least one virtual control which prompts a user to control execution of said color matching with the display at said proofing white point level; and

software for executing said color matching in response to user selection of said at least one virtual control by manipulation of the input device.