WO2023277876A1 - Réglage de profil de couleur d'affichage - Google Patents

Réglage de profil de couleur d'affichage Download PDF

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Publication number
WO2023277876A1
WO2023277876A1 PCT/US2021/039527 US2021039527W WO2023277876A1 WO 2023277876 A1 WO2023277876 A1 WO 2023277876A1 US 2021039527 W US2021039527 W US 2021039527W WO 2023277876 A1 WO2023277876 A1 WO 2023277876A1
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WO
WIPO (PCT)
Prior art keywords
electronic display
color
display
color profile
target electronic
Prior art date
Application number
PCT/US2021/039527
Other languages
English (en)
Inventor
Mario E. CAMPOS
Ron Y. ZHANG
Thong Thai
Original Assignee
Hewlett-Packard Development Company, L.P.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Priority to PCT/US2021/039527 priority Critical patent/WO2023277876A1/fr
Publication of WO2023277876A1 publication Critical patent/WO2023277876A1/fr

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Classifications

    • 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
    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/0693—Calibration of display systems
    • 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
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • 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
    • G09G5/04—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 using circuits for interfacing with colour displays

Definitions

  • a desktop computer may include a monitor that presents visual content such as applications executing on the computer, video presentations, and any variety of other visual content.
  • Fig. 1 is a block diagram of a display calibration device for adjusting a color profile of a target electronic display, according to an example.
  • FIG. 2 is a diagram of a stylus display calibration device for adjusting a color profile of a target electronic display, according to an example.
  • FIGs. 3A and 3B depict a display calibration device for adjusting a color profile of a target electronic display, according to an example.
  • Fig. 4 is a flowchart of a method for calibrating a color profile of a target electronic display, according to an example.
  • Fig. 5 is a flowchart of a method for calibrating a color profile of a target electronic display, according to an example.
  • Fig. 6 depicts an adjustment interface for calibrating a color profile of a target electronic display, according to an example.
  • Fig. 7 depicts a non-transitory machine-readable storage medium for calibrating a color profile of a target electronic display, according to an example.
  • identical reference numbers designate similar, but not necessarily identical, elements.
  • the figures are not necessarily to scale, and the size of some parts may be exaggerated to more clearly illustrate the example shown.
  • the drawings provide examples and/or implementations consistent with the description; however, the description is not limited to the examples and/or implementations provided in the drawings.
  • Display panels are used to visually present information generated by an electronic device. For example, through the display panel, a user may interface with applications, view video content, and/or digitally communicate with other users.
  • Different displays may have different presentation characteristics. For example, different displays may display colors differently.
  • a first display may display an image with a particular coloration. That same image, on another display, may have a different coloration based on any number of reasons.
  • the first display may be a light-emitting diode (LED) panel and the second display may be an LED panel by a different manufacturer, or may be a different model and/or different type of display. In either example, the physical characteristics of the different displays may result in colors being presented differently, even when displaying similar content.
  • LED light-emitting diode
  • the coloration of content presented on an electronic display is device dependent meaning that different electronic displays reproduce content differently. This may be because the color elements (e.g., phosphors) and their response to the individual coloration levels may vary from manufacturer to manufacturer, or even in the same electronic display over time or may be due to any number of other conditions.
  • the color elements e.g., phosphors
  • the difference in coloration may result in a variety of complications.
  • a user on a first electronic device may generate visual content such as a rendered video or image, based on the coloration at a first electronic display, which first electronic device may be at the user’s place of business. That user may desire to continue generation of the visual content, but on a different electronic device, for example on a computer display located at the home of the user.
  • the generated visual content generated at the first electronic display may appear different then when presented on the electronic display at the home of the user. As such, the content rendered on the second electronic device may be inaccurate to what the user intended.
  • a user may have two monitors coupled to a computer.
  • the displays may be from different manufacturers, different models from the same manufacturer, different types of displays, or even the same display, but having different ages, it may be that content presented on the different displays may have different coloration. As in the above example, this may be undesirable as coloration differences may result in content creation that does not meet the intent of the user.
  • the present specification describes a display calibration device that includes a color camera to calibrate a target display to a source display. Specifically, the camera may capture a color profile of a source electronic display. The camera may similarly capture a color profile of a target electronic display.
  • the display calibration device may compare the source electronic display color profile with the target electronic display color profile and make adjustments to the target electronic display such that the target electronic display color profile more closely aligns with the color profile of the source electronic display. Such adjustments may include red, green, blue (RGB) settings, brightness settings, and contrast settings.
  • RGB red, green, blue
  • the display calibration device is found within a stylus.
  • the user may place the camera of the stylus close to a calibration image on the source electronic display to capture the color profile of the source display. This color profile information may be stored on the stylus. The user may then take the stylus and similarly capture a color profile of the target electronic display.
  • a processor on the stylus determines adjustments to be made to the target electronic device color profile such that the colors presented on the target electronic display match the colors presented on the source electronic display.
  • the present specification describes a display calibration device.
  • the display calibration device includes a camera to capture images of content displayed on an electronic display.
  • the display calibration device also includes a processor.
  • the processor is to determine a color profile of the electronic display based on a captured image of content displayed on the electronic display and determines a difference between color profiles of different electronic displays.
  • the processor is also to determine an adjustment to be made to a color profile of a target electronic display to align with a color profile of a source electronic display based on a determined difference between color profiles.
  • the present specification also describes a method. According to the method, a camera captures, for each of a source electronic display and a target electronic display, images of content displayed. For each of the source electronic display and the target electronic display, a color value associated with each captured image is captured and multiple color values are combined to form a color profile for the electronic display. A difference is determined between a source electronic display color profile and a target electronic display color profile. The processor transmits to the target electronic display, an adjustment to be made to the target electronic display color profile based on a determined difference. [0019] The present specification also describes a non-transitory machine- readable storage medium encoded with instructions executable by a processor of an electronic device.
  • the machine-readable storage medium includes instructions to, when executed by the processor, determine a color profile for a source electronic display and capture images of calibration content displayed on a target electronic display.
  • the calibration content includes multiple single-color tiles displayed on the target electronic display.
  • the instructions are also executable by the processor to 1) determine from the captured images from the target electronic display, a color profile for the target electronic display, 2) determine a difference between the source electronic display color profile and the target electronic display color profile, and 3) adjust the target electronic display color profile based on a determined difference.
  • such a device, method, and machine-readable storage medium may, for example 1) provide color calibration between multiple displays, regardless of differences between the multiple displays; 2) provide for portable measurement of color profiles for the multiple display color profiles; and 3) enables color accuracy for similar content presented on different displays.
  • the devices disclosed herein may address other matters and deficiencies in a number of technical areas, for example.
  • the term “color profile” refers to settings that define how colors are displayed on a display device. Different electronic displays may have different color profiles. That is, different electronic devices may present colors differently. As a particular example, a red flower depicted on a first electronic display may be a different shade as compared to the same red flower depicted on a second electronic display due in part to the difference in color profiles between the first and second electronic displays.
  • Fig. 1 is a block diagram of a display calibration device (100) for adjusting a color profile of a target electronic display, according to an example.
  • electronic displays may present similar content differently. Specifically, the coloration of a single image may vary across different electronic displays. Accordingly, the display calibration device (100) of the present specification calibrates multiple electronic displays by identifying, via a camera (102), the color profile of each electronic display, and indicating adjustments to be made to one of the electronic displays to align with the color profile of another electronic display.
  • the display calibration device (102) includes a camera (102) to capture images (104) of content displayed on an electronic display.
  • a camera (102) refers to a hardware component that captures and generate a digital image of captured content.
  • the camera (102) captures images of content displayed on an electronic display and determines a color profile of the captured content.
  • the camera (102) may be of different types.
  • the camera (102) illuminates with light having a broad wavelength light and differentiates the three (R, G, B) types of colors with a receiver.
  • the camera (102) illuminates the object with the three types of light (red, blue, and green) independently. In either case, the received light intensity of red, blue and green are detected, and the ratio of light received is calculated.
  • the camera (102) may differentiate between colors in the captured image.
  • the camera (102) includes a light to voltage converter.
  • the camera (102) may respond to color by generating a voltage proportional to the detected color.
  • the camera (102) captures colors as XYZ coordinates, where XYZ may represent any visible color.
  • the camera (102) may determine the color by capturing XYZ color representations of a number of targeted color patterns. These XYZ coordinates, or color values, may be combined for multiple color tiles to define the color profile.
  • the processor (106) of the display calibration device (100) processes the data from the camera (102) to extract the color profile for the electronic display.
  • the image from which the color profile is extracted is generic, and not specialized calibration content, displayed on the display. For example, an image of a landscape may be displayed on the electronic display.
  • the camera (102) may capture an image (104) of, and the processor (106) may determine a color profile (108), based on the color information collected from the image of the landscape.
  • the content may be specifically generated for purposes of calibration. For example, calibration content including either a series of sequential single-color tiles, or a displayed pattern of single-color tiles may be captured by the camera (102) and processed to identify a color profile (108).
  • the camera (102) may capture images of calibration content during a calibration mode. The camera (102) captures this content for both the source electronic display and a target electronic display wherein the target electronic display is to be matched to the source electronic display.
  • the display calibration device (100) also includes a processor (106).
  • the processor (106) is to carry out a number of functions. For example, the processor (106) may determine a color profile (108) of the electronic display based on a captured content of an image displayed on the electronic display. Again, the processor (106) makes such a determination for both the source electronic display and the target electronic display.
  • RGB red, blue, green
  • a hexadecimal color value a brightness value
  • contrast value a contrast value that may be captured.
  • each pixel may be defined by the RGB model.
  • red, blue, and green light are superimposed in various ways to reproduce a broad array of colors.
  • the color at any location may be defined by the R, G, and B values that combine to define that color at that location.
  • black may have an R, G, B index of (0, 0, 0,) while white has an R, G, B, index of (255, 255, 255).
  • Different colors along the spectrum have different indices as well.
  • red may have an index of (255, 0, 0)
  • green may have an index of (0, 255, 0)
  • blue may have an index of (0, 0, 255).
  • Combinations of non-zero RGB values may also define other colors.
  • purple may have an index of (128, 0, 128), while a brown color may have an index of (165, 42, 42).
  • a source electronic display may generate a red color with the index (255, 99, 71) with one shade
  • the target electronic display may generate a red color with the index (255, 99, 71) with a different shade.
  • the processor (106) rather than relying on indices for the colors, measures color values, for example, XYZ coordinates for each color, and compares XYZ coordinates between display panels, rather than relying on indexed values which may differ from one another.
  • the processor (106) may perform this same operation for the image being presented on the target electronic display.
  • the processor (106) may then determine a difference (110) between the color profiles of the different electronic displays. That is, the processor (106) may identify how the different electronic displays represent the same content differently.
  • the processor (106) may determine XYZ coordinates for a variety of colors, for example red, green, blue, white and black.
  • the difference between XYZ values for target R, G, B, W, B and source R, G, B, W, B, are used to determine the adjustment to be made, if any, on the target.
  • the processor (106) determines an adjustment (112) to be made to a color profile (108) of the target electronic display to align with a color profile (108) of a source electronic display based on a determined difference (110) between color profiles. In some examples, this may include determining a difference between current color values used on the target electronic display and the color values that would result in the target electronic display having the same coloration as that of the source electronic display.
  • each electronic display may have various settings by which the coloration may be adjusted.
  • the display calibration device (100) uses measured RGB differences to dictate how to adjust a scale of the target electronic display such that colors represented on the target electronic display more closely match those displayed on a source electronic display.
  • a possible color range of the target display may be determined.
  • a color range may be available through the display extended display identification data (EDID), monitor information file (INF) or other display information sources.
  • EDID display extended display identification data
  • INF monitor information file
  • an 8-bit display may have 256 levels of each R, G, B.
  • the processor (106) may acknowledge that a 0-100 R/G/B on-screen display (OSD) slider is linearly mapped to the 256 levels. With the color difference determined from calculated differences between the source color profile and the target color profile, the processor (106) may determine a change factor and map the change factor into the display range.
  • OSD on-screen display
  • a source display may have R color values of X,
  • Y, and Z and the target display may have R color values of X, Y’, and Z’. If the target R is more vivid than the source display R by Z%, the processor (106) may map that Z% into the display color range with the assumption that the OSD changes color linearly.
  • the electronic device associated with the target display’s GPU pipeline may be used to transform color to match the source.
  • Fig. 2 is a diagram of a display calibration device (100) for adjusting a color profile of a target electronic display, according to an example.
  • the display calibration device (100) is disposed within a stylus (214). That is, the stylus (214) includes a housing that encloses the components of the display calibration device (100). Specifically, the camera (102) and the processor (106) are housed within the stylus (214). Additional components such as a database (218) to store collected color profile information may also be housed within the stylus (214). That is, once color profiles (108) are determined for each of the source electronic display and the target electronic display, they may be stored on the database (218) for comparison by the processor (106).
  • the stylus (214) may house other components such as processors and other circuitry and hardware to facilitate use with a digital display.
  • the stylus (214) may include a tip for interaction with a touch- sensitive surface. As the tip moves across a digital surface or touch-sensitive surface, a visual representation is made on a display (e.g., the surface) that corresponds to the movement of the tip.
  • contact of the tip with the surface causes a function to execute on an electronic device to which the surface is coupled. For example, a user may tap on a certain portion of the surface with the tip to position a cursor on that portion of the surface. In another example, a user may tap on an icon on the surface, and an operation may be executed on the electronic device.
  • the tip includes an electrically conductive material such as a conductive rubber.
  • This electrically conductive material allows for an electrical input to be received, which as described above can be translated into an instruction to create a visual design element or execute an operation on the associated electronic device.
  • the tip may have a rounded plastic shape so as to not damage the surface with which it interacts.
  • the stylus (214) in addition to providing the tip that a user can communicate with an electronic display, provides a surface which a user can grasp.
  • the housing has a rubber sleeve, or other ergonomic feature, disposed along a portion of its length to provide a grip.
  • the grip provides a greater friction force such that a user can grasp the housing and more easily manipulate the stylus (214) to interact with the surface.
  • the housing may be formed of any material such as plastic or metal.
  • the stylus (214) may include a display (216) to indicate the color scanned and analyzed by the camera (102) and processor (106). For example, if a red calibration tile is scanned, the display (216) may indicate a red color. Doing so may provide a visual indication to the user regarding the calibration capture sequence.
  • the display calibration device (100) in a stylus (214) allows for the calibration process to be portable. That is, the stylus (214) provides for portable and simple determination of the source electronic display color profile and the target electronic display color profile. As such, rather than positioning a bulky or difficult display calibration device (100), a user may easily manipulate the stylus (214) to position the camera (102) adjacent the calibration content displayed on either the source electronic display or the target electronic display.
  • Figs. 3A and 3B depict a display calibration device (Fig. 1 , 100) for adjusting a color profile of a target electronic display (320-2), according to an example.
  • the target electronic display (320- 2) is coupled to a same electronic device (323) as the source electronic display (320-1), while in Fig. 3B, the target electronic display (320-2) is coupled to a different electronic device (323-2) than the electronic device (323-1) of the source electronic display (320-1).
  • the source electronic display (320-1 ) and the target electronic display (320-2) may each display calibration content.
  • the calibration content includes multiple single-color tiles.
  • a first tile with upward-left diagonal lines may represent a first color such as red
  • a second tile with a vertical and horizontal lines may represent a second color such as green
  • a third tile with crossing angled lines may represent a third color such as blue
  • a fourth tile with downward-right diagonal lines may represent a fourth color such as black
  • a fifth tile with horizontal lines may represent a fifth color such as white.
  • this calibration content may be displayed sequentially, for example the calibration content may include a full-screen tile of red followed sequentially by full-screen tiles of green, blue, black and white.
  • the stylus (214) may have a wireless transceiver (322) to indicate to the electronic devices (323) to which the electronic displays (320) are coupled that a particular tile has been captured, such that the electronic device (323) may advance to the next single colored tile.
  • the present display calibration device (Fig. 1 ,
  • the camera may capture an image (Fig. 1 , 104) of each of the single-color tiles as presented on the source electronic display (320-1).
  • the processor may analyze each captured image to determine a color value (e.g., X, Y, Z coordinates) associated with each captured image (Fig. 1 , 104) of a color tile.
  • a color value e.g., X, Y, Z coordinates
  • the camera may capture images of each of a red, green, and blue tile and calculate corresponding color values for each.
  • Fig. 1 , 102 may capture images of each of a red, green, and blue tile and calculate corresponding color values for each.
  • the processor may also combine the color values associated with each captured image of a single-color tile to generate a first color profile (108-1 ) or a color profile for the source electronic display (320-1).
  • the camera (102) may then be positioned adjacent similar tiles displayed on the target electronic display (320-2) and similarly generate a second color profile (108-2), or a color profile for the target electronic display (320-2) based on captured images of the same single-color tiles as presented on the target electronic display (320-2).
  • the processor (Fig. 1 , 106) may then determine a difference between the color profiles. That is, a red tile may have certain XYZ coordinates while the red tile on the target electronic display (320-2) may be a different XYZ coordinates. Similar differences may exist for the color values of the other color tiles. In this example, the difference between each color value may define a difference between the color profiles (108). [0047] Based on this determined difference, the processor (Fig. 1 , 106) may determine adjustments to be made to the target electronic display (320-2). For example, the processor (Fig. 1 , 106) may recommend to increase the target electronic display red component, to ensure that both the source electronic display and the target electronic display have the same XYZ coordinates for each color.
  • the display calibration device may include a wireless transceiver (322) to wirelessly transmit the indication of the adjustment to be made to the target electronic display (320-2).
  • the wireless transceiver (322) may include a wireless radio to receive and transmit wireless signals.
  • the wireless transceiver (322) may also include hardware components that implement the wireless protocol. Such a protocol may define what types of data may be transmitted, what commands are used to send and receive data, how data transfers are confirmed, and other settings that define how devices are to communicate via the wireless format.
  • these hardware components and program instructions may be referred to as a stack.
  • the wireless signal is a BLUETOOTH signal
  • these hardware components may be referred to as a BLUETOOTH stack.
  • Figs. 3A and 3B depict a source electronic display color profile (108-1) being used to adjust the color profile (108-2) of a single target electronic display (320-2), in some cases, the color profile (108-1 ) of the source electronic display (320-1) may be used to adjust multiple target electronic displays (320-2).
  • a source electronic display (320-1 ) may be used to adjust the electronic displays within an entire department, such that each electronic display in that department has a similar coloration as one another.
  • Fig. 4 is a flowchart of a method (400) for calibrating a color profile (Fig. 1 , 108) of a target electronic display (Fig. 3A, 320-2), according to an example.
  • a color profile (Fig. 1 , 108) is determined for each of a source electronic display (Fig. 3A, 320-1) and a target electronic display (Fig. 3A, 320-2).
  • the method (400) includes capturing (block 401) images of calibration content on the electronic displays (Fig. 3A, 320) wherein the calibration content may include multiple single-color tiles. That is, as described above, in some examples the content that is captured includes either a sequence, or simultaneously presented, single-color tiles.
  • the content is a generic, non-calibration image, for example of a landscape.
  • the processor calculates (block 402) a color value associated with each captured image.
  • the processor may determine color values for each of a red, blue, and green single-color tile from the source electronic display (Fig. 3A, 320-2) and may determine color values for each of a red, blue, and green single-color tile from the target electronic display (Fig. 3A, 320-2).
  • These, and/or other color values may be combined (block 403) to form a color profile (Fig.
  • the red color value, green color value, and blue color value for a source electronic display may be combined to define a source electronic display (Fig. 3A, 320-1) color profile (Fig. 1 , 108-1) and a red, green, and blue color value for the target electronic display (Fig. 3A, 320-2) may be combined to define a target electronic display (Fig. 3A, 320-2) color profile (Fig. 1 , 108-2).
  • the processor may determine (block 404) a difference between the source electronic display (Fig. 3A, 320-1) color profile (Fig. 1 , 108- 1) and the target electronic display (Fig. 3A, 320-2) color profile (Fig. 1, 108-2). For example, each color value (i.e., XYZ coordinate) for the source electronic display color profile (Fig. 1 , 108-1) may be compared against corresponding color values for the target electronic display color profile (Fig. 1 , 108-2). Based on these determined differences, the display calibration device (Fig. 1 , 100) may transmit (block 405) to the target electronic display (Fig. 3A, 320-2) or an electronic device (Fig. 3A, 323) to which the target electronic display (Fig. 3A, 320-2) is coupled, an adjustment to be made to the target electronic display color profile (Fig. 1 , 108-2).
  • the notification may be a visual indication on an adjustment interface of color values.
  • an electronic device (Fig. 3A, 323) may include an interface that allows a user to adjust the color values used by that electronic display (Fig. 3A, 320).
  • the display calibration device (Fig. 1 ,100) may transmit a visual indication, such as an arrow, that is superimposed on the interface and indicates where the color value should be set to ensure uniform coloration.
  • the interface may include sliders for each of R, G, and B such that a user may move the slider and adjust the color values used by the electronic display.
  • arrows may be indicated on each of the R, G, and B bars which indicate where the sliders should be positioned to ensure uniform coloration between the source electronic display (Fig. 3A, 320-1) and the target electronic display (Fig. 3A, 320-2).
  • An example of such a visual indication is provided below in connection with Fig. 6.
  • Fig. 5 is a flowchart of a method (500) for calibrating a color profile (Fig. 1 , 108) of a target electronic display (Fig. 3A, 320-2), according to an example.
  • the method (500) includes generating (block 501) the calibration content.
  • the calibration content may be simultaneously displayed single-color tiles as depicted in Figs. 3A and 3B or may be sequentially displayed single-color tiles.
  • an application may be run on an electronic device (Fig. 3A, 323) of the source electronic display (Fig. 3A, 320-1) and the target electronic display (Fig. 3A, 320-2) which application generates the calibration content.
  • the camera captures (block 502) images (Fig. 1 , 104) of the content, color values associated with each captured image are calculated (block 503) and combined (block 504) to form a color profile (Fig. 1 , 108) for each of the source electronic display (Fig. 3A, 320-1) and the target electronic display (Fig. 3A, 320-2). These operations may be performed as described above in connection with Fig. 4.
  • the method (500) may include determining (block 505) a difference between a source electronic display color profile (Fig. 1 , 108- 1) and the target electronic display color profile (Fig. 1 , 108-2).
  • each single-color tile has a predetermined color value, which may be a color value established by an originator of the content.
  • the method (500) includes determining a difference between the predetermined color value and a respective captured image color value, for each of the source electronic display (Fig. 3A, 320-1) and the target electronic display (Fig. 3A, 320-2).
  • the color profile difference vector for the source electronic display Fig.
  • a difference vector for the target electronic display (Fig. 3A, 320-2) may be (-10, +7, -2) indicating the measured color indices as compared to the predetermined values associated with the calibration content.
  • the processor (Fig. 1 , 106) may transmit (block 506) a notification of adjustment to be made to the target electronic display color profile (Fig. 1 , 108-2).
  • the method (500) may include automatically adjusting (block 507) the target electronic display color profile (Fig. 1 , 108-2) based on the determined difference.
  • the notification may be an indication that an adjustment is going to be made, or a notification that an adjustment has been made.
  • Such an adjustment may include providing instructions to a display controller of the target electronic display (Fig. 3A, 320- 2) to adjust emission characteristics of the lighting elements such that the intensity of the lighting elements results in a color index that matches the color index of the source electronic display.
  • the adjustment may instruct a display controller to adjust the intensity of light up or down, based on a determined difference. For example, provided that a target electronic display (Fig. 3A, 320-2) has a lower intensity of red coloration, the adjustment may instruct the display controller to increase the intensity of red coloration, such that the displayed reds of the target electronic display match, or more closely align, with those of the source electronic display (Fig. 3A, 320-1).
  • Fig. 6 depicts an adjustment interface for calibrating a color profile of a target electronic display (320-2), according to an example.
  • a notification may be provided to a user indicating an adjustment to be made to the target electronic display (320-2).
  • an electronic display (320) may present an interface that allows a user to adjust the color values used by that electronic display (320).
  • the display calibration device (Fig. 1 ,100) may transmit a visual indication, such as an arrow, that is superimposed on the interface and indicates where the color value should be set to ensure uniform coloration.
  • the interface may include sliders for each of R, G, and B such that a user may move the slider and adjust the color values used by the electronic display (320).
  • arrows may be indicated on each of the R, G, and B bars which indicate where the sliders should be positioned to ensure uniform coloration between the source electronic display (320-1) and the target electronic display (320-2).
  • Fig. 7 depicts a non-transitory machine-readable storage medium (72724) for calibrating a color profile of a target electronic display (Fig. 3A, 320- 2), according to an example.
  • a display calibration device (Fig. 1 , 100) includes various hardware components. Specifically, a display calibration device (Fig. 1 , 100) includes a processor (Fig. 1 , 106) and a machine-readable storage medium (724). The machine-readable storage medium (724) is communicatively coupled to the processor (Fig. 1 ,
  • the machine-readable storage medium (724) includes a number of instructions (726, 728, 730, 732, 734) for performing a designated function.
  • the machine-readable storage medium (724) causes the processor (Fig. 1 , 106) to execute the designated function of the instructions (726, 728, 730, 732, 734).
  • the machine-readable storage medium (724) can store data, programs, instructions, or any other machine-readable data that can be utilized to operate the display calibration device (Fig. 1 , 100).
  • Machine-readable storage medium (724) can store computer readable instructions that the processor (Fig. 1, 106) of the display calibration device (Fig. 1 , 100) can process, or execute.
  • the machine-readable storage medium (724) can be an electronic, magnetic, optical, or other physical storage device that contains or stores executable instructions.
  • Machine-readable storage medium (724) may be, for example, Random Access Memory (RAM), an Electrically Erasable Programmable Read- Only Memory (EEPROM), a storage device, an optical disc, etc.
  • RAM Random Access Memory
  • EEPROM Electrically Erasable Programmable Read- Only Memory
  • the machine- readable storage medium (724) may be a non-transitory machine-readable storage medium (724).
  • source display color profile instructions (726) when executed by the processor (Fig. 1 , 106), cause the processor (Fig. 1 , 106) to, determine a color profile (Fig. 1 , 108-1 ) for the source electronic display (Fig. 3A, 320-1). In some examples, this may include extracting the source electronic display color profile (Fig. 1 , 108-1) from a database, such as the database (Fig. 2, 218) on the stylus (Fig. 2, 214). In this example, rather than capturing the images (Fig. 1 , 104) with a camera (Fig. 1 , 102) and generating the color profile (Fig. 1 , 108), the color profile (Fig. 1 , 108) may be extracted from a database.
  • such a device, method, and machine-readable storage medium may, for example 1) provide coloration calibration between multiple displays, regardless of differences between the multiple displays; 2) provide for portable measurement of color profiles for the multiple display color profiles; and 3) enables color accuracy for similar content presented on different displays.
  • the devices disclosed herein may address other matters and deficiencies in a number of technical areas, for example.

Abstract

Selon un exemple, la présente divulgation concerne un dispositif de calibrage d'affichage. Le dispositif de calibrage d'affichage comprend une caméra pour capturer des images d'un contenu affiché sur une unité d'affichage électronique. Le dispositif de calibrage d'affichage comprend également un processeur. Le processeur sert à déterminer un profil de couleur de l'unité d'affichage électronique sur la base d'une image capturée du contenu affiché sur l'unité d'affichage électronique et à déterminer une différence entre des profils de couleur de différentes unités d'affichage électroniques. Le processeur sert également à déterminer un réglage à apporter à un profil de couleur d'une unité d'affichage électronique cible pour l'aligner avec un profil de couleur d'une unité d'affichage électronique source sur la base d'une différence déterminée entre des profils de couleur.
PCT/US2021/039527 2021-06-29 2021-06-29 Réglage de profil de couleur d'affichage WO2023277876A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030125892A1 (en) * 2001-12-31 2003-07-03 Edge Christopher J. Calibration techniques for imaging devices
US10205940B1 (en) * 2014-12-15 2019-02-12 Amazon Technologies, Inc. Determining calibration settings for displaying content on a monitor
US10649713B1 (en) * 2019-01-11 2020-05-12 Dell Products L.P. Calibrating multiple displays of a computing device to have a similar perceived appearance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030125892A1 (en) * 2001-12-31 2003-07-03 Edge Christopher J. Calibration techniques for imaging devices
US10205940B1 (en) * 2014-12-15 2019-02-12 Amazon Technologies, Inc. Determining calibration settings for displaying content on a monitor
US10649713B1 (en) * 2019-01-11 2020-05-12 Dell Products L.P. Calibrating multiple displays of a computing device to have a similar perceived appearance

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