WO2018065200A1 - System and method for performing control of individual image display devices in video wall display systems - Google Patents

System and method for performing control of individual image display devices in video wall display systems Download PDF

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Publication number
WO2018065200A1
WO2018065200A1 PCT/EP2017/073470 EP2017073470W WO2018065200A1 WO 2018065200 A1 WO2018065200 A1 WO 2018065200A1 EP 2017073470 W EP2017073470 W EP 2017073470W WO 2018065200 A1 WO2018065200 A1 WO 2018065200A1
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WO
WIPO (PCT)
Prior art keywords
image display
video wall
wall system
video
display device
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PCT/EP2017/073470
Other languages
French (fr)
Inventor
Senol AYDIN
Metin DUMAN
Tugrul HATIPOGLU
Turgay KALE
Ugur Halis KURT
Original Assignee
Arcelik Anonim Sirketi
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Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2018065200A1 publication Critical patent/WO2018065200A1/en

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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
    • 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
    • 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
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2370/00—Aspects of data communication
    • G09G2370/02—Networking aspects
    • G09G2370/022—Centralised management of display operation, e.g. in a server instead of locally
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
    • G09G2370/045—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/10—Use of a protocol of communication by packets in interfaces along the display data pipeline

Definitions

  • the present invention relates to control of individual image display devices in video wall display systems so as to achieve uniform operational parameter values such as volume or general white luminescence balance in video wall display systems
  • Image display devices present images on screens thereof and combination of multi-display devices in order to form a large screen display environment called a video wall is one of the functions achievable through combination and simultaneous operation of a plurality of individual image display devices.
  • the term video wall generally refers to the generation of a combined image from a single video input by means of a plurality of image display devices as a single video wall image.
  • the video wall may typically be arranged in the form of 1*4, 2*2, 3*3, 4*4 or much larger screen formats.
  • Video walls are basically preferred due to their capability to generate a very large screen whose tile layout can be customized by which a greater screen area and greater pixel density per unit cost can be achieved, which is advantageous due to manufacturing costs of single screens, hence allowing an unusual resolution when combined.
  • Video walls are conventionally used in large public venues such as stadiums. Video walls can be driven from multi-monitor video cards, but complex arrangements require special video processors capable to manage large video walls. Software based video wall controllers however use PCs and networking equipment.
  • a major problem that needs to be addressed in the field of video wall display systems is control of operational parameters such as volume or image properties to ensure color matching. Even if all component screens utilize the same technology, due to material variations, assembly tolerances, component aging and environmental effects such as humidity and temperature; each screen can produce a different color balance, color temperature and white luminescence from the same input signal or simply volume of one of the individual devices may need to be changed.
  • WO 2009086468 discloses a sensor for color calibration of one or more display devices using feedback obtained directly from said display devices.
  • the sensor reads and quantifies the output of a display device and transmits the results to the image processor.
  • the image processor compares the display characteristics and then modifies the 3D LUT (lookup table) of the display system according to the feedback signal to perform a “correction” that compensates for the differences between the display systems.
  • US 7618146 discloses a luminance correction circuit for a plurality of display devices.
  • the luminance correction circuit comprises a timing circuit for generating display position information, a coefficient arrangement control unit for implementing a non-linear arrangement of gain coefficients for gradation control that is carried out in picture element units and a gradation conversion LUT unit for adjusting display positions based on the display position information from the timing circuit and then implementing a luminance level conversion of input signal levels of the picture signals.
  • the present invention provides a system and method for performing uniformization of different parametric values in different image display devices of a video wall system in order to obtain uniform operation of each image display device.
  • the present invention therefore provides a system and method to achieve overall parametric value uniformization in video wall display systems as provided by the characterizing features defined in Claim 1.
  • Primary object of the present invention is hence to provide a system and method for achieving overall parametric value uniformization in video wall display systems.
  • the present invention proposes a video wall system having a multitude of image display devices and a control station sequentially communicating with each image display device of the video wall system.
  • the control station either communicates with a single image display device and sets a parametric value thereof or sets the same parametric value for all image display devices.
  • the information is transferred through serial communication so that each and every image display device receives the same data packets and transmits those to a neighboring display unit.
  • Communicated data packets in the form of a control command contain a function command packet and address information of a specific image display device to which said function command is to be applied or alternatively a function command packet whose function is to be applied to all display units.
  • Fig. 1a demonstrates content of packets to be sent through serial ports for controlling image display devices in the video wall according to the present invention.
  • Fig. 1b and 1c demonstrates exemplary 2*2 and 3*3 screen formats.
  • Fig. 2 demonstrates general connection diagram of a video wall with four image display devices according to the present invention.
  • each image display device is a serial device with a bus consisting of two conductors, i.e. one for sending data and another for receiving and two serial pins: the receiver, RX, and the transmitter, TX.
  • the present invention proposes a video wall system with a multitude of image display devices.
  • the video wall system’s operation is effectuated such that each image display device is individually set to identify its particular enlarged screen portion of the overall screen as delineated below.
  • the video wall system of the invention is created by means of a plurality of image display devices, the latter together forming a combined very large screen in the form of a generally rectangular web.
  • Each of the combined image display devices then generates and displays a certain dedicated portion of the video content so that the video content can be displayed on a combined large screen.
  • Each of said image display devices comprises a control unit for identification and generation of the dedicated portion of the complete image or video content.
  • Each image display device therefore processes the received image or video content to create a certain portion of the overall screen area together with a plurality of neighboring or adjacent image display devices.
  • the video distribution is possible through different methods.
  • One of the methods includes a central video distributor system and each image to be displayed on a single image display device is distributed by said central video distributor system. The image is accordingly divided by the central system.
  • Cable installation must be carried out during the system setup and in case a need for repair emerges, the operation often requires complete maintenance of the overall installation.
  • Video transmission lines are established by connection of all devices to the central video distributor system. Video transfer is typically effectuated by HDMI or DVI-D connections.
  • Another method uses serial connection between separate image display devices through which transfer of the whole video content to an adjacent image display device is performed. Appropriate divisioning of the video content by individual image display devices is ensured by a processor of each image display device.
  • the video wall system may operate according to the method of serial transmission of the image or video content to obtain an overall image in a much larger size that a single display device cannot display, by way of dividing the main image into a plurality of image portions for display on separate image display devices.
  • a control station of the video wall system can typically be a computer system with video stream processing capabilities.
  • the control station may transfer the source images to a first image display device to be transmitted from said first image display device to one of the immediately neighboring display devices through the input and output connectors on the video transmission line.
  • Each image display device within the video wall system is configured to display a certain dedicated portion of the image or video content and accordingly divides the image or video content so as to generate a specially adapted portion thereof corresponding to the specific screen area of the overall combined screen size depending on the number of image display devices on the vertical and horizontal axes.
  • each image display device identifies the particular portion of the video to be displayed by setting the location of each image display device in a matrix-like web.
  • the location information of each image display device is communicated to the respective control unit of the device.
  • each image display device and the location thereof is indexed within the matrix and is identified by its row and column such as (1, 2), (5, 6) or the like.
  • each screen can produce a different version of the same image in terms of color balance, color temperature and white luminescence from the same input signal. Further, when multiple screens are placed side by side, the human eye discerns this discrepancy. Therefore, the present invention is devised under the recognition that image discrepancies and other irregularities among a plurality of image display devices making up the video wall system needs to be quickly and practically addressed in order for ensuring uniform operation of all devices without relying on manual input.
  • the invention proposes a method and system by which said control station serially sequentially communicates control information to each and every image display device in the video wall web to adjust operational parameters such as volume, gamma, RGB and white luminescence etc.
  • a look-up table of current parametric values is retrieved and stored for each image display device.
  • control station simultaneously reconfigures current parametric values in said look-up table to eliminate any deviations in terms of image or sound parameter values whereby operational uniformity in a plurality of display devices is ensured.
  • the video wall performs in a uniform manner with regard to various display and sound parameters without any additional manual input. It is to be noted that configuration of a plurality of units making up the overall system would otherwise necessitate individual configuration of all units.
  • each image display device is connected by means of a serial port connection such that a connection bus ensures sending and receiving data by serial pins: the receiver RX and the transmitter TX, as generally shown in Fig. 2.
  • Said control station configures at least one operational parameter value of a particular image display device in the video wall system by sending a control command containing a function command data packet and address information of said image display device to which said function command is applicable.
  • the control command further conventionally contains a header packet, a packet containing information as to the number of packets being sent and typically a CRC packet.
  • the present invention proposes a video wall system having a multitude of image display devices, each image display device receiving video transmission to generate and display a certain dedicated portion of a video content by which the video content is displayable in the form of a combined screen, said video wall system further comprising a control station controlling the operation thereof in data communication with each image display device of the video wall system.
  • said control station sequentially communicates with each image display device of the video wall system through serial communication so as to adjust operational parameter values of a particular image display device in the video wall system.
  • said control station configures at least one operational parameter value of said particular image display device in the video wall system by sending a control command containing a function command packet and address information of said image display device to which said function command is applicable.
  • said operational parameter values include volume, gamma, RGB and white luminescence values.
  • said control station stores a look-up table of performable tasks in association with function commands and address information of image display devices in the video wall system.
  • said control station configures at least one operational parameter value of all of the image display devices in the video wall system by sending a control command containing a function command packet and address information indicative of all of the image display devices to which said function command is applicable.
  • the invention provides practical, quick and automatic correction of non-uniform parameter values in a video wall system.

Abstract

The present invention relates to a video wall system having a multitude of image display devices (TV1 - TV4), each image display device receiving video transmission to generate and display a certain dedicated portion of a video content by which the video content is displayable in the form of a combined screen, said video wall system further comprising a control station (CONTROL UNIT) controlling the operation thereof in data communication with each image display device of the video wall system.

Description

SYSTEM AND METHOD FOR PERFORMING CONTROL OF INDIVIDUAL IMAGE DISPLAY DEVICES IN VIDEO WALL DISPLAY SYSTEMS
The present invention relates to control of individual image display devices in video wall display systems so as to achieve uniform operational parameter values such as volume or general white luminescence balance in video wall display systems
Image display devices present images on screens thereof and combination of multi-display devices in order to form a large screen display environment called a video wall is one of the functions achievable through combination and simultaneous operation of a plurality of individual image display devices. The term video wall generally refers to the generation of a combined image from a single video input by means of a plurality of image display devices as a single video wall image. The video wall may typically be arranged in the form of 1*4, 2*2, 3*3, 4*4 or much larger screen formats.
Video walls are basically preferred due to their capability to generate a very large screen whose tile layout can be customized by which a greater screen area and greater pixel density per unit cost can be achieved, which is advantageous due to manufacturing costs of single screens, hence allowing an unusual resolution when combined.
Video walls are conventionally used in large public venues such as stadiums. Video walls can be driven from multi-monitor video cards, but complex arrangements require special video processors capable to manage large video walls. Software based video wall controllers however use PCs and networking equipment.
A major problem that needs to be addressed in the field of video wall display systems is control of operational parameters such as volume or image properties to ensure color matching. Even if all component screens utilize the same technology, due to material variations, assembly tolerances, component aging and environmental effects such as humidity and temperature; each screen can produce a different color balance, color temperature and white luminescence from the same input signal or simply volume of one of the individual devices may need to be changed.
When multiple screens are placed side by side, the human eye can easily discern image discrepancies. As it is impossible to determine which screens will be used together and in which order, it is not possible to fix differences beforehand.
Among others, one of the prior art disclosures in the technical field of the present invention may be referred to as WO 2009086468, which discloses a sensor for color calibration of one or more display devices using feedback obtained directly from said display devices. The sensor reads and quantifies the output of a display device and transmits the results to the image processor. The image processor compares the display characteristics and then modifies the 3D LUT (lookup table) of the display system according to the feedback signal to perform a “correction” that compensates for the differences between the display systems.
Another prior art disclosure in the technical field of the present invention may be referred to as US 7618146, which discloses a luminance correction circuit for a plurality of display devices. The luminance correction circuit comprises a timing circuit for generating display position information, a coefficient arrangement control unit for implementing a non-linear arrangement of gain coefficients for gradation control that is carried out in picture element units and a gradation conversion LUT unit for adjusting display positions based on the display position information from the timing circuit and then implementing a luminance level conversion of input signal levels of the picture signals.
The present invention provides a system and method for performing uniformization of different parametric values in different image display devices of a video wall system in order to obtain uniform operation of each image display device.
The present invention therefore provides a system and method to achieve overall parametric value uniformization in video wall display systems as provided by the characterizing features defined in Claim 1.
Primary object of the present invention is hence to provide a system and method for achieving overall parametric value uniformization in video wall display systems.
The present invention proposes a video wall system having a multitude of image display devices and a control station sequentially communicating with each image display device of the video wall system. The control station either communicates with a single image display device and sets a parametric value thereof or sets the same parametric value for all image display devices. The information is transferred through serial communication so that each and every image display device receives the same data packets and transmits those to a neighboring display unit. Communicated data packets in the form of a control command contain a function command packet and address information of a specific image display device to which said function command is to be applied or alternatively a function command packet whose function is to be applied to all display units.
Accompanying drawings are given solely for the purpose of exemplifying a system and method by which a video wall is operable, whose advantages over prior art were outlined above and will be explained in brief hereinafter.
The drawings are not meant to delimit the scope of protection as identified in the claims nor should they be referred to alone in an effort to interpret the scope identified in said claims without recourse to the technical disclosure in the description of the present invention.
Fig. 1a demonstrates content of packets to be sent through serial ports for controlling image display devices in the video wall according to the present invention. Fig. 1b and 1c demonstrates exemplary 2*2 and 3*3 screen formats.
Fig. 2 demonstrates general connection diagram of a video wall with four image display devices according to the present invention. Typically, each image display device is a serial device with a bus consisting of two conductors, i.e. one for sending data and another for receiving and two serial pins: the receiver, RX, and the transmitter, TX.
The present invention proposes a video wall system with a multitude of image display devices. The video wall system’s operation is effectuated such that each image display device is individually set to identify its particular enlarged screen portion of the overall screen as delineated below.
The video wall system of the invention is created by means of a plurality of image display devices, the latter together forming a combined very large screen in the form of a generally rectangular web. Each of the combined image display devices then generates and displays a certain dedicated portion of the video content so that the video content can be displayed on a combined large screen. Each of said image display devices comprises a control unit for identification and generation of the dedicated portion of the complete image or video content. Each image display device therefore processes the received image or video content to create a certain portion of the overall screen area together with a plurality of neighboring or adjacent image display devices.
The video distribution is possible through different methods. One of the methods includes a central video distributor system and each image to be displayed on a single image display device is distributed by said central video distributor system. The image is accordingly divided by the central system. Cable installation must be carried out during the system setup and in case a need for repair emerges, the operation often requires complete maintenance of the overall installation. Video transmission lines are established by connection of all devices to the central video distributor system. Video transfer is typically effectuated by HDMI or DVI-D connections.
Another method uses serial connection between separate image display devices through which transfer of the whole video content to an adjacent image display device is performed. Appropriate divisioning of the video content by individual image display devices is ensured by a processor of each image display device.
Due to simplicity, the video wall system may operate according to the method of serial transmission of the image or video content to obtain an overall image in a much larger size that a single display device cannot display, by way of dividing the main image into a plurality of image portions for display on separate image display devices.
A control station of the video wall system can typically be a computer system with video stream processing capabilities. The control station may transfer the source images to a first image display device to be transmitted from said first image display device to one of the immediately neighboring display devices through the input and output connectors on the video transmission line.
It is to be noted that two neighboring image display devices can be placed vertically, horizontally or otherwise with respect to one another so that a generally rectangular shape large screen is obtainable. Each image display device within the video wall system is configured to display a certain dedicated portion of the image or video content and accordingly divides the image or video content so as to generate a specially adapted portion thereof corresponding to the specific screen area of the overall combined screen size depending on the number of image display devices on the vertical and horizontal axes.
Therefore, the present invention ensures that each image display device identifies the particular portion of the video to be displayed by setting the location of each image display device in a matrix-like web. The location information of each image display device is communicated to the respective control unit of the device. In an exemplary video wall system having six image display devices on the horizontal axis and five image display devices on the vertical axis, each image display device and the location thereof is indexed within the matrix and is identified by its row and column such as (1, 2), (5, 6) or the like.
As is known, in video wall systems, even if all screens utilize the same technology, due to material variations, assembly tolerances, component aging and environmental effects such as humidity and temperature; each screen can produce a different version of the same image in terms of color balance, color temperature and white luminescence from the same input signal. Further, when multiple screens are placed side by side, the human eye discerns this discrepancy. Therefore, the present invention is devised under the recognition that image discrepancies and other irregularities among a plurality of image display devices making up the video wall system needs to be quickly and practically addressed in order for ensuring uniform operation of all devices without relying on manual input.
To this end, the invention proposes a method and system by which said control station serially sequentially communicates control information to each and every image display device in the video wall web to adjust operational parameters such as volume, gamma, RGB and white luminescence etc. In a preferred embodiment of the invention, a look-up table of current parametric values is retrieved and stored for each image display device.
Further, said control station simultaneously reconfigures current parametric values in said look-up table to eliminate any deviations in terms of image or sound parameter values whereby operational uniformity in a plurality of display devices is ensured. As a result, the video wall performs in a uniform manner with regard to various display and sound parameters without any additional manual input. It is to be noted that configuration of a plurality of units making up the overall system would otherwise necessitate individual configuration of all units.
According to the present invention, each image display device is connected by means of a serial port connection such that a connection bus ensures sending and receiving data by serial pins: the receiver RX and the transmitter TX, as generally shown in Fig. 2. Said control station configures at least one operational parameter value of a particular image display device in the video wall system by sending a control command containing a function command data packet and address information of said image display device to which said function command is applicable. The control command further conventionally contains a header packet, a packet containing information as to the number of packets being sent and typically a CRC packet.
In a nutshell, the present invention proposes a video wall system having a multitude of image display devices, each image display device receiving video transmission to generate and display a certain dedicated portion of a video content by which the video content is displayable in the form of a combined screen, said video wall system further comprising a control station controlling the operation thereof in data communication with each image display device of the video wall system.
In one embodiment of the present invention, said control station sequentially communicates with each image display device of the video wall system through serial communication so as to adjust operational parameter values of a particular image display device in the video wall system.
In a further embodiment of the present invention, said control station configures at least one operational parameter value of said particular image display device in the video wall system by sending a control command containing a function command packet and address information of said image display device to which said function command is applicable.
In a further embodiment of the present invention, said operational parameter values include volume, gamma, RGB and white luminescence values.
In a further embodiment of the present invention, said control station stores a look-up table of performable tasks in association with function commands and address information of image display devices in the video wall system.
In a further embodiment of the present invention, said control station configures at least one operational parameter value of all of the image display devices in the video wall system by sending a control command containing a function command packet and address information indicative of all of the image display devices to which said function command is applicable.
Therefore, the invention provides practical, quick and automatic correction of non-uniform parameter values in a video wall system.

Claims (4)

  1. A video wall system having a multitude of image display devices, each image display device receiving video transmission to generate and display a certain dedicated portion of a video content by which the video content is displayable in the form of a combined screen, said video wall system further comprising a control station controlling the operation thereof in data communication with each image display device of the video wall system characterized in that;
    said control station sequentially communicates with each image display device of the video wall system through serial communication so as to adjust operational parameter values of a particular image display device in the video wall system,
    said control station configures at least one operational parameter value of said particular image display device in the video wall system by sending a control command containing a function command packet and address information of said image display device to which said function command is applicable.
  2. A video wall system as in Claim 1, characterized in that said operational parameter values include volume, gamma, RGB and white luminescence values.
  3. A video wall system as in Claim 1 or 2, characterized in that said control station stores a look-up table of performable tasks in association with function commands and address information of image display devices in the video wall system.
  4. A video wall system as in Claim 1, 2 or 3, characterized in that said control station configures at least one operational parameter value of all of the image display devices in the video wall system by sending a control command containing a function command packet and address information indicative of all of the image display devices to which said function command is applicable.
PCT/EP2017/073470 2016-10-07 2017-09-18 System and method for performing control of individual image display devices in video wall display systems WO2018065200A1 (en)

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TR2016/14110A TR201614110A1 (en) 2016-10-07 2016-10-07 System and method for performing control of individual image display devices in video wall display systems

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009086468A1 (en) 2008-01-02 2009-07-09 Panavision International, L.P. Correction of color differences in multi-screen displays
US7618146B2 (en) 2004-07-16 2009-11-17 Nec Viewtechnology, Ltd. Multiscreen display system, multiscreen display method, luminance correction method, and programs
US20110122048A1 (en) * 2009-11-25 2011-05-26 Samsung Electronics Co., Ltd. Video wall display system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7618146B2 (en) 2004-07-16 2009-11-17 Nec Viewtechnology, Ltd. Multiscreen display system, multiscreen display method, luminance correction method, and programs
WO2009086468A1 (en) 2008-01-02 2009-07-09 Panavision International, L.P. Correction of color differences in multi-screen displays
US20110122048A1 (en) * 2009-11-25 2011-05-26 Samsung Electronics Co., Ltd. Video wall display system

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