WO2012073341A1 - Dispositif d'affichage et procédé de correction pour dispositif d'affichage - Google Patents

Dispositif d'affichage et procédé de correction pour dispositif d'affichage Download PDF

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Publication number
WO2012073341A1
WO2012073341A1 PCT/JP2010/071400 JP2010071400W WO2012073341A1 WO 2012073341 A1 WO2012073341 A1 WO 2012073341A1 JP 2010071400 W JP2010071400 W JP 2010071400W WO 2012073341 A1 WO2012073341 A1 WO 2012073341A1
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WO
WIPO (PCT)
Prior art keywords
image quality
quality characteristic
correction
unit
target image
Prior art date
Application number
PCT/JP2010/071400
Other languages
English (en)
Japanese (ja)
Inventor
隆一 藤村
勝之 松井
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 JP2012546618A priority Critical patent/JP5773453B2/ja
Priority to PCT/JP2010/071400 priority patent/WO2012073341A1/fr
Publication of WO2012073341A1 publication Critical patent/WO2012073341A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits

Definitions

  • the present invention relates to a display device and a display device calibration method.
  • the present invention has been made to solve the above-described problem, and provides a display device and a display device calibration method capable of easily calibrating an image quality that has changed with long-term use. It is.
  • the pre-correction image quality characteristic acquisition unit includes an image quality characteristic detection unit that receives a light flux of the non-image quality correction image and detects the pre-correction image quality characteristic value.
  • the pre-correction image quality characteristic value is luminance versus gradation data of the non-image quality corrected image, and each of the plurality of types of target image quality characteristic values is: It is the luminance vs. gradation data corresponding to the target image quality.
  • a display device calibration method includes a first step in which a display unit captures a non-corrected video signal and displays a non-image quality corrected image; A second step in which the image quality characteristic acquisition unit acquires an image quality characteristic value before correction based on the non-image quality corrected image displayed by the display unit, and the target image quality characteristic acquisition unit stores a plurality of types of target image quality characteristic values.
  • FIG. 6 It is a block diagram showing the functional structure of the display apparatus which is one Embodiment of this invention.
  • 6 is a flowchart illustrating a procedure of image quality calibration processing of a display unit in the embodiment. It is the figure which plotted the brightness
  • FIG. 1 is a block diagram showing a functional configuration of a display device according to an embodiment of the present invention.
  • the display device 1 is a device that takes in a video signal supplied from an external video signal generator and displays a video.
  • the video signal is, for example, data of 12 bits for each of red, green, and blue (RGB).
  • the display device 1 includes a pre-correction image quality characteristic storage unit 20, a target image quality characteristic storage unit 30, a target image quality characteristic acquisition unit 40, a correction data generation unit 50, a lookup table 60, a display unit 70, and an operation unit. 80 and a control unit 90.
  • the non-image quality corrected image is an image displayed on the display unit 70 in a state where the image quality is not corrected. Therefore, the pre-correction image quality characteristic value is an image quality characteristic value before the image quality is corrected.
  • the image quality characteristic detection unit 10 may be provided when the image quality of the display device 1 is calibrated, or may be provided so that a part of a light beam emitted from the display unit 70 can always be received.
  • the display unit 70 captures the corrected video signal (corrected video signal) or the uncorrected video signal (uncorrected video signal) supplied from the lookup table 60 and displays the video.
  • the display unit 70 includes a display panel that displays an image.
  • the display unit 70 includes a liquid crystal display panel, a PDP (Plasma Display Panel), an organic EL (Electro-Luminescence) display panel, and the like.
  • the display unit 70 may be realized by including a D / A (digital / analog) conversion circuit and a CRT (Cathode Ray Tube).
  • the display device 1 performs an image quality calibration process every time a use period during which the image quality characteristics of the display unit 70 may change is passed.
  • the use period is, for example, 1000 hours.
  • the target image quality characteristic storage unit 30 stores target image quality characteristic values representing a plurality of types of image quality characteristics.
  • the target image quality characteristic value is a target value of the image quality characteristic to be corrected by the display unit 70.
  • luminance versus gradation data representing the gamma characteristic
  • the coordinate value of the white point in the display image and each chromaticity coordinate of RGB in the color gamut Value.
  • the target image quality characteristic storage unit 30 stores target image quality characteristic values representing three types of image quality characteristics as profile data 31a, 31b, and 31c.
  • the target image quality characteristic storage unit 30 stores luminance versus gradation data indicating image quality characteristics suitable for print preview as profile data 31a, and luminance versus gradation indicating image quality characteristics suitable for display of a captured image by a video camera. Data is stored as profile data 31b, and luminance versus gradation data indicating image quality characteristics suitable for text display is stored as profile data 31c. Note that the target image quality characteristic storage unit 30 may store profile data defined by the user.
  • the target image quality characteristic acquisition unit 40 reads one type of target image quality characteristic value selected by the control of the control unit 90 from the target image quality characteristic storage unit 30 and holds it. That is, in FIG. 1, the target image quality characteristic acquisition unit 40 is selected by the control of the control unit 90 from the profile data 31a, 31b, 31c including the luminance versus gradation data stored in the target image quality characteristic storage unit 30. Read and hold one type of profile data.
  • the correction data generation unit 50 has an image quality characteristic suitable for displaying a captured image by the video camera based on the luminance versus gradation data already read from the pre-correction image quality characteristic storage unit 20 and the captured profile data 31b. Second correction data for correction is generated, and the second correction data is written in an area different from the storage area of the first correction data in the lookup table 60. Further, the correction data generation unit 50 takes in the profile data 31 c including the luminance versus gradation data from the target image quality characteristic acquisition unit 40. Then, the correction data generation unit 50 corrects the image quality characteristic suitable for text display based on the luminance versus gradation data already read from the pre-correction image quality characteristic storage unit 20 and the captured profile data 31c. 3 is generated, and the third correction data is written in an area different from the storage area of the first and second correction data in the lookup table 60. A specific example of a process in which the correction data generation unit 50 generates correction data will be described later.
  • the look-up table 60 is a video signal correction unit that corrects a video signal with the correction data written by the correction data generation unit 50, and is realized by a semiconductor storage device such as a flash memory.
  • the look-up table 60 receives video signal data as an address input, outputs correction data stored in the addressed data area as a corrected video signal, and supplies the corrected video signal to the display unit 70.
  • the storage area of the correction data used for correction is specified by the control of the control unit 90.
  • the control unit 90 designates a storage area by, for example, address decoding processing.
  • the look-up table 60 stores uncorrected data that does not correct the video signal in advance, and can output the uncorrected video signal by address decoding processing by the control unit 90.
  • the OSD menu includes an image quality calibration processing start tab for starting the image quality calibration processing of the display unit 70.
  • the OSD menu has a profile selection having three profile selection tabs for selecting one of the first to third correction data set in the lookup table 60 in correspondence with the profile data 31a, 31b, 31c. Includes menu.
  • the OSD menu newly registers (stores) profile data defined by the user in the target image quality characteristic storage unit 30, changes the contents of the already registered profile data 31a, 31b, 31c, Includes a profile data editing menu for deleting definition profile data.
  • the control unit 90 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), and a ROM (Read Only Memory) (not shown), and the CPU reads a program stored in the ROM and executes it. By doing so, each part of the display device 1 is controlled.
  • a CPU Central Processing Unit
  • RAM Random Access Memory
  • ROM Read Only Memory
  • the control unit 90 when the key value of the setting value change button is supplied to the control unit 90 by pressing the setting value change button of the operation unit 80, the control unit 90 reads the OSD menu from the ROM and displays the display unit 70. To display. If the key code of the movement instruction button is supplied to the control unit 90 when the movement instruction button of the operation unit 80 is pressed while the OSD menu is displayed, the control unit 90 uses the cursor as the key code. In response, the display is moved and displayed, or the value of the item currently indicated by the cursor is increased or decreased according to the key code.
  • FIG. 2 is a flowchart showing the procedure of the image quality calibration process of the display unit 70 of the display device 1. This calibration process is executed for the display device 1 whose use period of about 1000 hours has passed.
  • the display device 1 executes the processing according to the flowchart of FIG.
  • step S1 the OSD menu is displayed on the display unit 70, and the setting value changing button of the setting unit changing button is pressed when the setting value changing button of the operation unit 80 is pressed while the cursor indicates the image quality calibration processing start tab.
  • the control unit 90 starts image quality calibration processing of the display unit 70.
  • step S ⁇ b> 2 the control unit 90 controls the uncorrected data in the lookup table 60 to be readable, and causes the lookup table 60 to output an uncorrected video signal.
  • the control unit 90 instructs the image quality characteristic detection unit 10 to detect the pre-correction image quality characteristic value.
  • the control unit 90 stores the pre-correction image quality characteristic value detected by the image quality characteristic detection unit 10 in the pre-correction image quality characteristic storage unit 20.
  • the control unit 90 causes the pre-correction image quality characteristic storage unit 20 to store luminance versus gradation data in the non-image quality corrected image detected by the image quality characteristic detection unit 10.
  • the target image quality characteristic acquisition unit 40 selects one type of target image quality characteristic value from among a plurality of types of target image quality characteristic values stored in the target image quality characteristic storage unit 30 under the control of the control unit 90. And hold it.
  • the target image quality characteristic acquisition unit 40 reads and holds the profile data 31a from the profile data 31a, 31b, 31c including the luminance versus gradation data stored in the target image quality characteristic storage unit 30 under the control of the control unit 90.
  • step S4 the correction data generation unit 50 reads the pre-correction image quality characteristic value from the pre-correction image quality characteristic storage unit 20, and takes in the target image quality characteristic value from the target image quality characteristic acquisition unit 40.
  • the correction data generation unit 50 generates correction data based on the read pre-correction image quality characteristic value and the captured target image quality characteristic value.
  • the correction data generation unit 50 reads the luminance versus gradation data, which is the pre-correction image quality characteristic value, from the pre-correction image quality characteristic storage unit 20, and the profile data 31a including the luminance versus gradation data from the target image quality characteristic acquisition unit 40. take in.
  • the correction data generation unit 50 generates first correction data for correcting image quality characteristics suitable for print preview based on the read luminance versus gradation data and the acquired profile data 31a.
  • the horizontal axis represents the input gradation of the display unit
  • the vertical axis represents the luminance of the display unit.
  • the vertical axis is the correction LUT (lookup table) input gradation
  • the horizontal axis is the correction LUT output gradation.
  • the correction data generation unit 50 can obtain the corrected image quality characteristic shown in the third quadrant by repeatedly executing the procedure A to the procedure C for all the gradations.
  • the corrected image quality characteristic in the third quadrant can be obtained.
  • the value is set as correction data to be set in the lookup table 60.
  • step S5 the correction data generation unit 50 writes the correction data generated in the process of step S4 into the lookup table 60.
  • the correction data generation unit 50 writes the generated first correction data in the lookup table 60.
  • the correction data generation unit 50 takes in the target image quality characteristic value from the target image quality characteristic acquisition unit 40.
  • the correction data generation unit 50 generates correction data based on the pre-correction image quality characteristic value already read in step S2 and the target image quality characteristic value fetched in step S4.
  • the correction data generation unit 50 takes in the profile data 31b including the luminance versus gradation data from the target image quality characteristic acquisition unit 40.
  • the correction data generation unit 50 corrects image quality characteristics suitable for display of a captured image by the video camera based on the already read luminance versus gradation data and the acquired profile data 31b. Generate correction data.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

La présente invention comprend : une table de conversion (60) qui délivre des signaux vidéo corrigés obtenus par correction de signaux vidéo ; une unité d'affichage (70) qui acquiert un signal vidéo corrigé ou non corrigé et affiche une vidéo ; une unité de détection de caractéristique de qualité d'image (10) qui détecte la lumière provenant d'une image de qualité d'image non corrigée, affichée par l'unité d'affichage (70) lors de l'acquisition d'un signal vidéo non corrigé, et obtient une valeur de caractéristique de qualité d'image avant correction ; une unité de stockage de caractéristique de qualité d'image cible (30) qui stocke une pluralité de profils ; une unité de récupération de caractéristique de qualité d'image cible (40) qui sélectionne et récupère un profil dans l'unité de stockage de caractéristique de qualité d'image cible (30) ; et une unité de génération de données de correction (50) qui génère des données de correction sur la base de la valeur de caractéristique de qualité d'image avant correction et du profil récupéré, attribue un espace mémoire à la table de conversion (60) et écrit dedans les données de correction générées.
PCT/JP2010/071400 2010-11-30 2010-11-30 Dispositif d'affichage et procédé de correction pour dispositif d'affichage WO2012073341A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012546618A JP5773453B2 (ja) 2010-11-30 2010-11-30 表示装置および表示装置の校正方法
PCT/JP2010/071400 WO2012073341A1 (fr) 2010-11-30 2010-11-30 Dispositif d'affichage et procédé de correction pour dispositif d'affichage

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PCT/JP2010/071400 WO2012073341A1 (fr) 2010-11-30 2010-11-30 Dispositif d'affichage et procédé de correction pour dispositif d'affichage

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003288057A (ja) * 2002-03-28 2003-10-10 Fuji Photo Film Co Ltd 液晶表示装置
JP2007034209A (ja) * 2005-07-29 2007-02-08 Nanao Corp 液晶表示装置、輝度測定方法及びコンピュータプログラム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000276094A (ja) * 1999-03-29 2000-10-06 Fuji Photo Film Co Ltd 階調補正方法及び画像表示システム
JP2003295851A (ja) * 2002-03-29 2003-10-15 Fuji Photo Film Co Ltd 画像表示装置
JP4536582B2 (ja) * 2005-04-26 2010-09-01 ルネサスエレクトロニクス株式会社 表示制御装置及びルックアップテーブルの生成方法
JP2008166892A (ja) * 2006-12-27 2008-07-17 Sony Corp データ処理装置、画像信号処理装置、および方法、並びにコンピュータ・プログラム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003288057A (ja) * 2002-03-28 2003-10-10 Fuji Photo Film Co Ltd 液晶表示装置
JP2007034209A (ja) * 2005-07-29 2007-02-08 Nanao Corp 液晶表示装置、輝度測定方法及びコンピュータプログラム

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