WO2011120142A1 - Multiple display chrominance and luminance method and apparatus - Google Patents
Multiple display chrominance and luminance method and apparatus Download PDFInfo
- Publication number
- WO2011120142A1 WO2011120142A1 PCT/CA2011/000335 CA2011000335W WO2011120142A1 WO 2011120142 A1 WO2011120142 A1 WO 2011120142A1 CA 2011000335 W CA2011000335 W CA 2011000335W WO 2011120142 A1 WO2011120142 A1 WO 2011120142A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chrominance
- luminance
- displays
- display
- module
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/04—Display device controller operating with a plurality of display units
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/18—Use of a frame buffer in a display terminal, inclusive of the display panel
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Definitions
- the present disclosure generally relates to chrominance and luminance methods and apparatus, and more particularly, to methods and apparatus for providing chrominance and luminance for multiple displays.
- Some modern computer systems are known to drive multiple displays in a manner to collectively present a single large surface amongst the displays, which can be a cost effective solution to display a single large surface having a high resolution.
- one or more of the displays may have different display characteristics than other displays.
- one or more displays may be made by different manufacturers and/or one or more displays may be different model types.
- one or more displays may have varying chrominance and/or luminance characteristics making the presented single large surface appear inconsistent across the multiple displays, which is undesirable.
- Figure 1 is an exemplary depiction of a device including a chrominance and luminance module according to the present disclosure
- Figure 2 is an exemplary functional block diagram of the chrominance and luminance module
- Figure 3 is a flowchart depicting exemplary operations that can be performed by the chrominance and luminance module
- Figure 4 is a flowchart depicting exemplary operations that can be performed by the chrominance and luminance module.
- Figure 5 is a flowchart depicting exemplary operations that can be performed by the chrominance and luminance module.
- an apparatus includes a chrominance and luminance module.
- the chrominance and luminance module obtains display characteristics of each of a plurality of displays.
- the chrominance and luminance module selectively adjusts, on a per display basis, chrominance and luminance for each of the displays based on the display characteristics.
- the displays collectively display a single large surface.
- a related method is also disclosed.
- the method and apparatus provide, among other advantages, a substantially equivalent chrominance and luminance across the displays, for example, when displaying the single large surface.
- a substantially equivalent chrominance and luminance across the displays for example, when displaying the single large surface.
- different makes and/or models of displays can be used in conjunction to display the single large surface without having differing chrominance and luminance characteristic for the various displays.
- Other advantages will be recognized by those of ordinary skill in the art.
- the chrominance and luminance module selectively adjusts the chrominance and luminance for each of the plurality of displays based on display characteristics of each of the plurality of displays. In one example, the chrominance and luminance module adjusts the chrominance based on a common chrominance range that each of the displays are capable of presenting. The common chrominance range is based on the display characteristics of the plurality of displays. In one example, the chrominance and luminance module selectively adjusts the luminance based on a common luminance range that each of the displays are capable of presenting. The common luminance range is based on the display characteristics of the plurality of displays.
- the display characteristics comprise information in accordance with extended display identification data and/or display identification data. In another example, the display characteristics are based on a visual perception of the plurality of displays collectively displaying the single large surface. [0015] In one example, the chrominance and luminance of each of the plurality of displays are individually adjusted to provide a substantially equivalent chrominance and luminance across all of the plurality of displays when displaying the single large surface.
- an apparatus includes a chrominance module, a luminance module, and a control module.
- the chrominance module selectively provides, on a per display basis, adjusted chrominance display information for each of a plurality of displays in response to image information.
- the luminance module selectively provides, on a per display basis, adjusted luminance image information for each of the plurality of displays in response to the adjusted chrominance image information.
- the control module which is operatively coupled to the chrominance module and the luminance module, controls the chrominance module to provide the provide the adjusted chrominance image information and the luminance module to provide the adjusted luminance information based on display characteristics of each of the plurality of displays, wherein the plurality of displays are operative to collectively display a single large surface.
- the chrominance module provides the adjusted chrominance image information based on the common chrominance range that each of the displays are capable of presenting, wherein the common chrominance range is based on the display characteristics of the plurality of displays.
- module can include an electronic circuit, one or more processors (e.g., shared, dedicated, or group of processors such as but not limited to microprocessors, DSPs, or central processing units) and memory that execute one or more software or firmware programs, combinational logic circuits, an ASIC, and/or other suitable components that provide the described functionality.
- processors e.g., shared, dedicated, or group of processors such as but not limited to microprocessors, DSPs, or central processing units
- signal may refer to one or more currents, one or more voltages, or a data signal.
- the layout of a “module” can be described and laid out in a hardware description language such as VerilogTM, VHDL, and/or other suitable hardware description languages.
- the device 100 such as a wireless phone, a mobile and/or stationary computer, a printer, a LAN interface (wireless and/or wired), a media player, a video decoder and/or encoder, and/or any other suitable device is depicted.
- the device 100 includes a processor module 102, a bridge module 104, a memory module 106, a graphics processor module 108, and a plurality of displays 110, 112, 114.
- a graphics processor module in this example, skilled artisans will appreciate that the graphics processor module 108 can process video information in addition to graphics information.
- the displays 110, 112, 114 can be external to the device 100 if desired.
- the displays 1 10, 112, 1 14 are configured to collectively present an entire frame as a single large surface 115. Although not depicted, in some embodiments, there may be six displays aligned in a rectangular arrangement having three columns and two rows. As such, in this example, each of the displays can present 1/6 of a frame so that the combination of all the displays 110, 112, 114 present the entire frame as the single large surface 115. Although six displays are discussed in this example, it is contemplated that any number of displays can be included and arranged as desired. [0022]
- the processor module 102 is operatively coupled to the bridge module 104 and processes requests from the bridge module 104.
- the memory module 106 stores information communicated from the bridge module 104.
- the bridge module 104 communicates image information 116 (e.g., drawing commands, and/or other suitable unprocessed image information) to the graphics processor module 108, which processes the information for presentation on the displays 110, 1 12, 114.
- the graphics processor module 108 can include an image processor module 118, a chrominance and luminance module 120, and a frame buffer module 122 configured substantially as shown.
- the image processor module 118 provides processed image information 124 to the chrominance and luminance module 120 in response to the image information 116.
- the image processor module 118 can provide the processed image information 124 to the frame buffer module 122 if desired.
- the processed image information 124 is stored as an entire image frame 126 having image frame portions (e.g., 1, 2, N, M-2, M-l, M) corresponding to each of the displays 110, 112, 114.
- image frame portion 1 corresponds to display 110
- image frame portion 2 corresponds to display 112
- image frame portion M corresponds to display 114 although other configurations are contemplated.
- the displays 1 10, 1 12, 114 display respective image frame portions (e.g., 1, 2, N, M-2, M-l, M) of the entire frame 126 to collectively present the single large surface 115 across the displays 110, 112, 114.
- the chrominance and luminance module 120 In response to the processed image information 124 (or stored processed image information 128), the chrominance and luminance module 120 selectively adjusts, on a per display basis, chrominance and luminance of respective streams of image information provided for each of the displays 110, 112, 1 14. More specifically, the chrominance and luminance module 120 adjusts chrominance and luminance of the processed image information 124 (or stored processed image information 128) to provide adjusted chrominance and luminance image information 130, 132, 134 for each respective display 110, 112, 114.
- the chrominance and luminance of the respective streams of image information are adjusted so that each of the displays 110, 112, 114 provide a substantially equivalent chrominance and luminance across the displays when displaying the single large surface 115.
- image information e.g., adjusted chrominance and luminance image information 130, 132, 134
- each of the displays 110, 112, 114 provide a substantially equivalent chrominance and luminance across the displays when displaying the single large surface 115.
- different makes and/or models of displays can be used in conjunction to display the single large surface 115 without having differing chrominance and luminance characteristic for the various displays.
- the chrominance and luminance module 120 selectively adjusts the chrominance and luminance of the respective streams of image information for each of the displays 110, 112, 114 based on display characteristics of each of the displays 110, 112, 114.
- the display characteristics provide information regarding each displays display characteristic capabilities such as luminance information (e.g., gamma or intensity characteristics) and chrominance information (e.g., color gamut).
- the chrominance and luminance module 120 would adjust the processed image information 124 (or stored processed image information 128) so that a color gamut of a particular image would fall within common range (e.g., the overlapping area or intersection) color gamuts for all displays 110, 112, 114.
- the chrominance and luminance module 120 obtains respective display characteristic information 136, 138, 140 for each of the displays 110, 112, 114.
- the display characteristic information 136, 138, 140 can be any suitable information describing the characteristics (or capabilities) of the displays 1 10, 112, 114 such a chrominance ranges (e.g., color gamut), luminance ranges (e.g., gamma or intensity information), and/or other suitable information.
- the display characteristic information 136, 138, 140 can comprise information in accordance with extended display identification information (EDID), Display Identification data (DisplaylD), and/or other suitable information.
- EDID extended display identification information
- DisplaylD Display Identification data
- a user can visually perceive the chrominance and luminance characteristics of the displays 110, 112, 114 and provide the display characteristic information 136, 138, 140 based thereon.
- a user can visually perceive (or measure) the chrominance and luminance characteristics of the displays 1 10, 1 12, 114 using known color calibration equipment such as a Konica Minolta CA-100 Color Analyzer for example.
- the chrominance and luminance module 120 includes a chrominance and luminance control module 200, multiple chrominance modules 202, 204, 206, and multiple luminance modules 208, 210, 212 substantially configured as shown.
- the chrominance modules 202, 204, 206 and luminance modules 208, 210, 212 can be transposed so that a luminance operation is performed prior to a chrominance operation if desired.
- Each of the chrominance modules 202, 204, 206 are associated with a respective display 110, 112, 114.
- each of the luminance modules 208, 210, 212 are associated with a respective display 110, 112, 114.
- the chrominance and luminance control module 200 obtains display characteristic information 214 (e.g., 136, 138, 140) for each of the displays 110, 112, 114.
- the chrominance and luminance control module 200 determines common chrominance and luminance ranges that each of the displays 110, 1 12, 114 are capable of displaying.
- the chrominance and luminance control module 200 can determine common chrominance ranges based on an intersection of the gamut space for all the displays 110, 112, 114.
- the chrominance and luminance control module 200 can determine common luminance ranges based on an intersection of the luminance information for all the displays 110, 112, 114.
- the chrominance and luminance control module 200 provides chrominance range control information 216, 218, 220 based on a common chrominance range for each of the displays 110, 112, 114. Likewise, the chrominance and luminance control module 200 provides luminance range control information 222, 224, 226 based on a common luminance range for each of the displays 110, 112, 114.
- the chrominance and luminance control module 200 essentially controls the chrominance modules 202, 204, 206 and luminance modules 208, 210, 212 to selectively adjust chrominance and luminance of the processed image information 124 (or stored processed image information 128) based on the chrominance range control information 216, 218, 220 and the luminance range control information 222, 224, 226, respectively.
- the chrominance range control information 216, 218, 220 is depicted as multiple information signals, the chrominance range control information 216, 218, 220 can be combined as a single chrominance range control information signal if desired.
- the luminance range control information 222, 224, 226 can also be combined into a single luminance range control information signal if desired.
- each of the chrominance modules 202, 204, 206 receive respective image information 228, 230, 232 corresponding with the processed image information 124 (or stored processed image information 128).
- each of the chrominance modules 202, 204, 206 selectively adjust the image information 228, 230, 232 based on the chrominance range control information 216, 218, 220 to provide respective adjusted chrominance image information 234, 236, 238.
- each of the luminance modules 208, 210, 212 selectively adjust the adjusted chrominance image information 234, 236, 238 based on the luminance range control information 222, 224, 226 to provide the respective adjusted chrominance and luminance image information 130, 132, 134 for each respective display 110, 112, 1 14.
- exemplary operations that can be performed by the chrominance and luminance module 120 are generally identified at 300.
- the process starts at 302.
- the chrominance and luminance module 120 obtains the respective display characteristics 136, 138, 140 for each of displays 110, 112, 1 14.
- the chrominance and luminance module 120 selectively adjusts, on a per display basis, chrominance and luminance of the respective streams of image information for the displays 110, 112, 114 so that the displays 110, 112, 114 can collectively display the single large surface 115 having substantially equivalent chrominance and luminance characteristics.
- the chrominance and luminance module 120 selectively adjusts the image information 228, 230, 232 for each respective display 110, 1 12, 114 so that they collectively display the single large surface 115 having substantially equivalent chrominance and luminance characteristics. The process ends at 308.
- the chrominance and luminance control module 200 obtains chrominance information from the display characteristic information 136 associated with display 110.
- the chrominance and luminance control module 200 obtains chrominance information from the display characteristic information 138 associated with display 112.
- the chrominance and luminance control module 200 compares the chrominance information associated with display 110 and display 112 to determine a common chrominance range for each of the displays 110, 112.
- the chrominance and luminance control module 200 provides chrominance range control information 216, 218 to respective chrominance modules 202, 204, which selectively adjusts the image information 228, 230 so that the adjusted chrominance image information 234, 236 fall within a common chrominance range and the displays 1 10, 112 can display chrominance values that are substantially the same.
- the chrominance and luminance control module 200 obtains luminance information from the display characteristic information 136 associated with display 110.
- the chrominance and luminance control module 200 obtains luminance information from the display characteristic information 138 associated with display 112.
- the chrominance and luminance control module 200 compares the luminance information associated with display 110 and display 112 to determine a common luminance range for each of the displays 110, 112.
- the chrominance and luminance control module 200 provides luminance range control information 222, 224 to respective luminance modules 208, 210, which selectively adjust the adjusted chrominance image information 234, 236 so that the adjusted chrominance and luminance image information 130, 132 fall within a common luminance range and the displays 110, 112 can display luminance values that are substantially the same.
- the chrominance and luminance control module 200 determines whether the are other displays configured to display the single large surface 115. If there are additional displays (such as display 114 for example), the process returns to 404. However, if there are no more displays configured to display the single large surface 1 15, the process ends at 422.
- exemplary operations that can be performed by the chrominance and luminance module 120 are generally identified at 500.
- the process starts at 502.
- the chrominance and luminance module 120 obtains chrominance and luminance information from the display characteristic information for a respective display 110, 112, 114.
- the chrominance and luminance module 120 determines whether there is another display. If there is another display, the chrominance and luminance module 120 obtains chrominance and luminance information from the display characteristic associated with the display.
- the process proceeds to 508 and 510.
- each process can be performed serially if desired. For example 508 can be performed and then 510 can be subsequently performed or vice versa.
- the chrominance and luminance control module 200 determines a common chrominance range for the displays 110, 1 12, 114. As noted above, in one embodiment, the common chrominance range can be based on an intersection of the display chrominance information (e.g., gamut space) for each of the displays. [0038] At 510, the chrominance and luminance control module 200 determines a common luminance range for the displays 110, 112, 114. As noted above, in one embodiment, the common luminance range can be based on an intersection of the display luminance information (e.g., gamma or intensity information) for each of the displays.
- the display luminance information e.g., gamma or intensity information
- the chrominance and luminance module 120 provides the adjusted chrominance and luminance image information 130, 132, 134 for each respective display 110, 112, 114 so that the displays 110, 112, 114 can collectively present the single large surface 115 having substantially equivalent chrominance and luminance.
- the process ends at 514.
- the method and apparatus provide a substantially equivalent chrominance and luminance across the displays, for example, when displaying the single large surface.
- different makes and/or models of displays can be used in conjunction to display the single large surface without having differing chrominance and luminance characteristic for the various displays.
- Other advantages will be recognized by those of ordinary skill in the art.
- Coupled is defined as connected, although not necessarily directly, and not necessarily mechanically.
- the terms "comprises,” “comprising,” or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
- the terms a or an, as used herein, are defined as one or more than one.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2013501572A JP2013527489A (en) | 2010-03-30 | 2011-03-29 | Method and apparatus for chromaticity and brightness of multiple displays |
EP11761865.2A EP2553677A4 (en) | 2010-03-30 | 2011-03-29 | Multiple display chrominance and luminance method and apparatus |
KR1020127028475A KR20130018824A (en) | 2010-03-30 | 2011-03-29 | Multiple display chrominance and luminance method and apparatus |
CN2011800163037A CN102870152A (en) | 2010-03-30 | 2011-03-29 | Multiple display chrominance and luminance method and apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US31911510P | 2010-03-30 | 2010-03-30 | |
US61/319,115 | 2010-03-30 | ||
US13/052,761 | 2011-03-21 | ||
US13/052,761 US20110242142A1 (en) | 2010-03-30 | 2011-03-21 | Multiple display chrominance and luminance method and apparatus |
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WO2011120142A1 true WO2011120142A1 (en) | 2011-10-06 |
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PCT/CA2011/000335 WO2011120142A1 (en) | 2010-03-30 | 2011-03-29 | Multiple display chrominance and luminance method and apparatus |
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US (1) | US20110242142A1 (en) |
EP (1) | EP2553677A4 (en) |
JP (1) | JP2013527489A (en) |
KR (1) | KR20130018824A (en) |
CN (1) | CN102870152A (en) |
WO (1) | WO2011120142A1 (en) |
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- 2011-03-29 JP JP2013501572A patent/JP2013527489A/en not_active Withdrawn
- 2011-03-29 CN CN2011800163037A patent/CN102870152A/en active Pending
- 2011-03-29 WO PCT/CA2011/000335 patent/WO2011120142A1/en active Application Filing
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JP2014219630A (en) * | 2013-05-10 | 2014-11-20 | 三菱電機株式会社 | Liquid crystal multi-screen display device and liquid crystal multi-screen control device |
US9547467B1 (en) | 2015-11-25 | 2017-01-17 | International Business Machines Corporation | Identifying the positioning in a multiple display grid |
US9710217B2 (en) | 2015-11-25 | 2017-07-18 | International Business Machines Corporation | Identifying the positioning in a multiple display grid |
US9727300B2 (en) | 2015-11-25 | 2017-08-08 | International Business Machines Corporation | Identifying the positioning in a multiple display grid |
US10061552B2 (en) | 2015-11-25 | 2018-08-28 | International Business Machines Corporation | Identifying the positioning in a multiple display grid |
Also Published As
Publication number | Publication date |
---|---|
US20110242142A1 (en) | 2011-10-06 |
CN102870152A (en) | 2013-01-09 |
EP2553677A1 (en) | 2013-02-06 |
EP2553677A4 (en) | 2014-04-23 |
JP2013527489A (en) | 2013-06-27 |
KR20130018824A (en) | 2013-02-25 |
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