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WO2013008317A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2013008317A1
WO2013008317A1 PCT/JP2011/065897 JP2011065897W WO2013008317A1 WO 2013008317 A1 WO2013008317 A1 WO 2013008317A1 JP 2011065897 W JP2011065897 W JP 2011065897W WO 2013008317 A1 WO2013008317 A1 WO 2013008317A1
Authority
WO
WIPO (PCT)
Prior art keywords
display device
display
luminance
color temperature
change amount
Prior art date
Application number
PCT/JP2011/065897
Other languages
English (en)
Japanese (ja)
Inventor
光太郎 小川
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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 Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2011/065897 priority Critical patent/WO2013008317A1/fr
Publication of WO2013008317A1 publication Critical patent/WO2013008317A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the 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
    • 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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

Definitions

  • the present invention relates to a display device having an automatic display correction function used in a multi-screen display system in which a plurality of display devices are connected and handled as one display device.
  • a multi-screen display device that connects a plurality of display devices and handles them as one display device.
  • the display device is set to multi-screen display, adjust the brightness of each display device making up the multi-screen so that the multi-screen as a whole will have a uniform screen display with no variations in brightness and color temperature. It is common.
  • the brightness of each display device gradually decreases as time passes, and the change in each display device varies, so that the difference in brightness between the display devices increases as time elapses.
  • the luminance difference between the display devices in the display is conspicuous. This becomes more noticeable because the time-dependent change of CCFL (Cold Cathode Fluorescent Lamp) / LED (Light Emitting Diode) as the light source is different for each display device.
  • CCFL Cold Cathode Fluorescent Lamp
  • LED Light Emitting Diode
  • the luminance of the light source of each display unit is detected by a luminance sensor, and the luminance information is collected by the master display unit, and the master display unit collects each multi-screen based on the luminance information.
  • a multi-screen that periodically calculates the luminance correction amount so that the luminance of the display units constituting the same is aligned and notifies the display unit of each slave, and the slave display unit performs luminance correction based on this correction amount
  • a display device is known (for example, see Patent Document 1). According to this multi-screen display device, it is possible to automatically correct the temporal change of the light source at a constant cycle without stopping the device even during operation.
  • the present invention has been made in view of such circumstances, and a display device capable of automatically correcting the screen display of each display device constituting the multi-screen display device without providing a master display device.
  • the purpose is to provide.
  • the present invention relates to a display device that is used in a multi-screen display device by arranging a plurality of display devices, a display unit that displays an image, a sensor that detects the luminance of the display unit, and a luminance value in an initial state of the display unit Is calculated from the output value of the sensor, the luminance value of the initial state stored in the storage unit, and the calculated luminance change amount constitutes the multi-screen display device.
  • a communication unit that notifies the other display device and receives the luminance change amount of the other display device from the other display device, and the maximum luminance change amount and the self luminance among the luminance change amounts of the other display device
  • a control unit that obtains a difference from the change amount, obtains a correction amount for correcting the luminance of the display unit from the difference, and performs control for reducing the luminance of the display unit based on the correction amount; To do.
  • the luminance change amount when a luminance change amount obtained from the output value of the sensor and the luminance value in the initial state stored in the storage unit exceeds a predetermined value, the luminance change amount is displayed on the other display. It is characterized by notifying the apparatus.
  • the present invention is characterized in that the display unit includes a backlight and a liquid crystal panel that changes the light transmittance of the backlight, and the sensor detects the luminance of the backlight.
  • the present invention is a display device that is used in a multi-screen display device by arranging a plurality of display devices, the display unit displaying an image, a sensor that detects the color temperature of the display unit, and the color of the initial state of the display unit
  • a color temperature degree change amount is obtained from a storage unit that stores a temperature value, an output value of the sensor, and a color temperature value in the initial state stored in the storage unit, and the obtained color temperature change amount is calculated using the multi-value
  • the maximum of the color temperature change amount of the other display device Control for adjusting the color temperature of the display unit based on the correction amount, and obtaining a correction amount for correcting the color temperature of the display unit from the difference.
  • a control unit for performing the operation.
  • the present invention provides the color temperature change amount when the color temperature change amount obtained from the output value of the sensor and the color temperature value in the initial state stored in the storage unit exceeds a predetermined value. It is characterized by notifying another display device.
  • the present invention is characterized in that the display unit includes a backlight and a liquid crystal panel that changes the light transmittance of the backlight, and the sensor detects a color temperature of the backlight.
  • each display device when the amount of change between the output value of the sensor for detecting the luminance provided in each display device constituting the multi-screen display device and the initial luminance value is reduced from the value by a predetermined value or more, Each display device notifies the other display device of the value of the amount of change in luminance, and each display device has the value of the maximum change amount and the amount of change of its own among the change amount values of the other display devices. Since the difference between the values is obtained, the amount of correction for correcting the brightness of the backlight is obtained from this difference, and control is performed to reduce the brightness of the backlight based on this amount of correction. The effect that the operation can be automatically executed is obtained.
  • each display device calculates the correction amount to match the maximum change amount value, control is performed to align the brightness with the same device configuration without using a display device having a master and slave function. It becomes possible to do.
  • the color temperature is detected and controlled so as to align the color temperature based on the change amount of the color temperature, an effect that the correction processing operation for aligning the color temperature can be automatically executed is obtained.
  • FIG. 2 It is a block diagram which shows the structure of one Embodiment of this invention.
  • 2 is a flowchart illustrating an operation of the display device illustrated in FIG. 1. It is explanatory drawing which shows the luminance change by elapsed time. It is explanatory drawing which shows the method of the brightness
  • FIG. 1 is a block diagram showing the configuration of the embodiment.
  • reference symbols A, B, and C denote three display devices that constitute a multi-screen display device. Since the three display devices A, B, and C are display devices having the same function, the configuration of the display device A will be described here.
  • Reference numeral 11 denotes a display unit that includes a liquid crystal panel and a backlight, and displays an image by changing the light transmittance of the backlight by the liquid crystal panel.
  • Reference numeral 12 denotes a sensor that detects and outputs the luminance of the backlight provided in the display unit 11.
  • Reference numeral 13 denotes a storage unit that stores an initial value of the luminance detected by the sensor 12 for the luminance of the backlight in the initial state.
  • Reference numeral 14 denotes a control unit that corrects luminance in order to align the luminance of the display devices A, B, and C that perform multi-screen display.
  • Reference numeral 15 denotes a communication unit that performs information communication with another display device.
  • display devices B and C have the same configuration as the display device A, and each block is illustrated with a different symbol to distinguish the display devices A, B, and C. Yes.
  • FIG. 3 is an explanatory diagram showing a change in luminance according to elapsed time.
  • the luminances of the screens of the display devices A, B, and C after time t are luminance at and luminance, respectively.
  • bt and luminance ct are luminance at and luminance, respectively.
  • the present invention corrects the luminance by controlling the luminance of the backlight so as to automatically eliminate the variation in luminance.
  • FIG. 2 is a flowchart showing the operation of the display device shown in FIG.
  • the three display devices A, B, and C are adjusted so that the luminance is uniform in the initial state, and the initial luminance value obtained by detecting the luminance of the backlight at that time by the sensors 12, 22, and 32 is They are stored in the storage units 13, 23 and 33, respectively.
  • the operation of the display device A will be described, but the brightness correction is also controlled for the display devices B and C by the same operation.
  • control unit 14 reads the output value of the sensor 12 that detects the luminance of the backlight (step S1). Moreover, the control part 14 reads the initial luminance value memorize
  • the control unit 14 regards that there is a change in luminance, and other display devices (here, display devices B and C) via the communication unit 15. Is notified of the value of the obtained change amount ⁇ a (step S4).
  • the value of the change amount ⁇ a is received by the control unit 24 via the communication unit 25 and is received by the control unit 34 via the communication unit 35.
  • the control unit 24 reads the output value of the sensor 22 and reads the initial luminance value stored in the storage unit 23, A change amount (difference between the output value of the sensor 22 and the initial luminance value) is obtained from the output value of the sensor 22 and the initial luminance value, and the value of the change amount ⁇ b is obtained via the communication unit 25 to another display device. (Here, display devices A and C) are notified.
  • control unit 34 reads the output value of the sensor 32, reads the initial luminance value stored in the storage unit 33, and changes the amount of change (the sensor 32 from the output value of the sensor 32 and the initial luminance value). The difference between the output value and the initial luminance value) is obtained, and the value of the amount of change ⁇ c is notified to other display devices (here, display devices A and B) via the communication unit 35.
  • This operation is the same in the control unit 14.
  • each of the other two display devices also obtains the amount of change of the self and notifies the other display device of the obtained amount of change.
  • each of the three display devices A, B, and C obtains its own change amount and the other two change amounts ( ⁇ a, ⁇ b, ⁇ c).
  • the control unit 14 receives the amount of change (here, ⁇ b, ⁇ c) from the other two display devices (here, display devices B and C) via the communication unit 15 (step S5). Then, the luminance correction amount is obtained from the own change amount ⁇ a and the change amounts ⁇ b and ⁇ c of other display devices. As the luminance correction amount, the maximum change amount is selected from the three change amounts ⁇ a, ⁇ b, and ⁇ c, and a value obtained by subtracting the own change amount from the change amount is set as the correction amount. For example, as shown in FIG.
  • the correction amount is obtained so that the luminances of the display device A and the display device B are matched with the luminance of the display device C. That is, as shown in FIG. 5, the correction amount is obtained assuming that the values of ⁇ a and ⁇ b are ⁇ c.
  • the display device A obtains the correction amount ( ⁇ c ⁇ a) from the difference between its own change amount ⁇ a and the change amount ⁇ c of the display device C.
  • the display device B obtains a correction amount ( ⁇ c ⁇ b) from the difference between its own change amount ⁇ b and the change amount ⁇ c of the display device C.
  • control unit 14 determines whether or not correction is necessary based on the obtained correction amount, that is, whether or not the correction amount is 0 (step S7). If correction is not necessary (the correction amount is 0). If so, return to step S1 without correction and repeat the processing operation. On the other hand, if correction is necessary (if the correction amount is not 0), the control unit 14 performs control to lower the luminance of the backlight based on the correction amount (step S8). With this processing operation, the luminance of the three display devices A, B, and C is matched to the luminance of the display device having the lowest luminance.
  • each display device notifies the other display device of the value of the amount of change in luminance, and each display device has the value of the maximum change amount and the value of its own change amount among the change amount values of the other display devices.
  • the difference in brightness is calculated, the amount of correction for correcting the brightness of the backlight is determined from this difference, and control is performed to reduce the brightness of the backlight based on the amount of correction.
  • a correction processing operation can be executed.
  • the display devices A, B, and C obtain the correction amount so as to match the value of the maximum change amount, the brightness can be increased with the same device configuration without using a display device having a master and slave function. It is possible to perform control to align.
  • the example in which the multi-screen is configured by the three display devices A, B, and C has been described.
  • the brightness is increased by the processing operation described above.
  • the display devices constituting the multi-screen display device may have the same device configuration, it can be easily performed even when the number of display devices constituting the multi-screen display device is changed.
  • a multi-screen display device composed of four display devices can be easily replaced with a multi-screen display device composed of two sets of two devices. This eliminates the need for the display device, so that the device configuration of the entire device can be simplified.
  • the sensors 12, 22, and 32 shown in FIG. 1 are sensors that detect luminance. However, instead of the luminance sensor, an R / G / B color sensor is used, so that the amount of change in color temperature can be used. The color temperature may be controlled by the same processing operation. Further, a luminance sensor and a color sensor may be used, and control may be performed so that the luminance and the color temperature are aligned based on the amount of change in luminance and color temperature.
  • the brightness correction processing is performed by recording a program for realizing the function of the control unit shown in FIG. 1 on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. May be performed.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.
  • RAM volatile memory
  • the program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium.
  • the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
  • the program may be for realizing a part of the functions described above. Furthermore, what can implement

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention se rapporte à un dispositif d'affichage. Dans la solution technique décrite dans la présente invention, la luminosité de l'écran de chaque dispositif d'affichage qui compose un dispositif d'affichage à écrans multiples peut être corrigée automatiquement. Un dispositif d'affichage selon la présente invention est utilisé en tant qu'un dispositif d'affichage à écrans multiples constitué par la juxtaposition d'une pluralité desdits dispositifs d'affichage. Le dispositif d'affichage comprend : un module d'affichage, qui sert à afficher une image ; un capteur, qui sert à détecter la luminosité du module d'affichage ; un module de stockage, qui sert à stocker une valeur de luminosité dans l'état initial du module d'affichage ; un module de communication, qui sert à acquérir l'ampleur du changement de luminosité à partir de la valeur délivrée en sortie par le capteur et de la valeur de luminosité dans l'état initial qui est stockée dans le module de stockage, et qui sert d'autre part à transmettre aux autres dispositifs d'affichage qui composent le dispositif d'affichage à écrans multiples l'ampleur acquise du changement de luminosité et à recevoir des autres dispositifs d'affichage l'ampleur du changement de luminosité dans les autres dispositifs d'affichage ; et un module de commande, qui sert à acquérir une différence entre l'ampleur du changement de luminosité de son propre dispositif et l'ampleur maximale du changement de luminosité parmi les ampleurs du changement de luminosité dans les autres dispositifs d'affichage, et à acquérir l'ampleur de la correction nécessaire pour corriger la luminosité du module d'affichage à partir de la différence, et à réduire ensuite la luminosité du module d'affichage sur la base de l'ampleur de la correction.
PCT/JP2011/065897 2011-07-12 2011-07-12 Dispositif d'affichage WO2013008317A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/065897 WO2013008317A1 (fr) 2011-07-12 2011-07-12 Dispositif d'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/065897 WO2013008317A1 (fr) 2011-07-12 2011-07-12 Dispositif d'affichage

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WO2013008317A1 true WO2013008317A1 (fr) 2013-01-17

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1090645A (ja) * 1996-09-12 1998-04-10 Matsushita Electric Ind Co Ltd 液晶表示装置
JP2001249652A (ja) * 2000-03-07 2001-09-14 Hitachi Ltd マルチスクリーン表示装置、表示システム及びこれらに用いるプロジェクタ駆動回路
JP2001324971A (ja) * 2000-05-17 2001-11-22 Nec Corp マルチ画面表示装置及びその色バランス制御方法
JP2007171327A (ja) * 2005-12-20 2007-07-05 Pentax Corp プロジェクタユニット、及び、マルチビジョンシステム
JP2007183397A (ja) * 2006-01-06 2007-07-19 Yokogawa Electric Corp 表示装置
JP2009216857A (ja) * 2008-03-10 2009-09-24 Seiko Epson Corp プロジェクタ、画像表示システム、及び画像補正方法
JP2009294423A (ja) * 2008-06-05 2009-12-17 Panasonic Corp 自発光表示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1090645A (ja) * 1996-09-12 1998-04-10 Matsushita Electric Ind Co Ltd 液晶表示装置
JP2001249652A (ja) * 2000-03-07 2001-09-14 Hitachi Ltd マルチスクリーン表示装置、表示システム及びこれらに用いるプロジェクタ駆動回路
JP2001324971A (ja) * 2000-05-17 2001-11-22 Nec Corp マルチ画面表示装置及びその色バランス制御方法
JP2007171327A (ja) * 2005-12-20 2007-07-05 Pentax Corp プロジェクタユニット、及び、マルチビジョンシステム
JP2007183397A (ja) * 2006-01-06 2007-07-19 Yokogawa Electric Corp 表示装置
JP2009216857A (ja) * 2008-03-10 2009-09-24 Seiko Epson Corp プロジェクタ、画像表示システム、及び画像補正方法
JP2009294423A (ja) * 2008-06-05 2009-12-17 Panasonic Corp 自発光表示装置

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