WO2009091063A1 - Processeur de signal d'image - Google Patents

Processeur de signal d'image Download PDF

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Publication number
WO2009091063A1
WO2009091063A1 PCT/JP2009/050680 JP2009050680W WO2009091063A1 WO 2009091063 A1 WO2009091063 A1 WO 2009091063A1 JP 2009050680 W JP2009050680 W JP 2009050680W WO 2009091063 A1 WO2009091063 A1 WO 2009091063A1
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WO
WIPO (PCT)
Prior art keywords
image data
image
frame
image signal
motion
Prior art date
Application number
PCT/JP2009/050680
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English (en)
Japanese (ja)
Inventor
Tomohisa Higuchi
Original Assignee
Thine Electronics, Inc.
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 Thine Electronics, Inc. filed Critical Thine Electronics, Inc.
Priority to JP2009550079A priority Critical patent/JP5222307B2/ja
Publication of WO2009091063A1 publication Critical patent/WO2009091063A1/fr

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Classifications

    • 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
    • G09G3/36—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 using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • 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
    • G09G2320/0252—Improving the response speed
    • 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
    • G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to 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
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • 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
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/103—Detection of image changes, e.g. determination of an index representative of the image change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

Definitions

  • the present invention relates to an image signal processing device that processes image data of each frame of an input image signal and then outputs the image signal to a liquid crystal display device.
  • Image display devices are roughly classified into impulse display devices and hold display devices.
  • a CRT Cathode Ray Tube
  • a screen is scanned by an electron gun, and display is performed only on pixels that have reached an electron beam.
  • a liquid crystal display device or an organic electroluminescence display device which is cited as an example of a hold-type display device
  • the frame of the image signal is updated at a constant period, and an instruction to display an image of a certain first frame is given.
  • the display of the first frame image is held until the display of the next second frame image is instructed.
  • the hold-type display device has various features such as less image distortion.
  • the liquid crystal display device has a problem that the response is slow. That is, it takes time from when the target display value of an image of a certain frame is instructed until the actual display value on the liquid crystal display device becomes the target display value. The required time may exceed the frame update period. Therefore, when a moving image with fast movement is displayed on the screen of the liquid crystal display device, the moving image may be blurred.
  • Overdrive technique is known as a technique intended to solve such a problem (see Patent Documents 1 and 2).
  • Overdrive technique when attention is paid to a certain pixel on the screen of the liquid crystal display device, the image data G 1 corresponding to the target display value in a certain first frame, corresponding to a target display value in the next second frame
  • the image data G 2 is corrected and the corrected image data G 2 ′ is given to the liquid crystal display device.
  • “G 2 ⁇ G 2 ′” is set when “G 1 ⁇ G 2 ”
  • “G 2 > G 2 ′” is set when “G 1 > G 2 ”.
  • the present invention has been made to solve the above-described problems, and an object thereof is to provide an image signal processing apparatus that can be configured at low cost.
  • An image signal processing apparatus is an image signal processing apparatus that processes image data of each frame of an input image signal and then outputs the image signal to a liquid crystal display device.
  • a motion detection unit that detects the direction of image motion based on the image data of each frame of the signal; (2) the current frame image data of the input image signal; and the direction of motion of the image detected by the motion detection unit; Based on the above, the previous frame image data generating unit for generating the image data of the previous frame, (3) the current frame image data of the input image signal, and the previous frame image data generated by the previous frame image data generating unit
  • a corrected image data output unit that corrects the image data of the current frame of the input image signal based on the image data and outputs the corrected image data to the liquid crystal display device. It is characterized by providing.
  • the motion detection unit detects the direction of the image motion based on the image data of each frame of the input image signal.
  • the previous frame image data generation unit generates image data of the previous frame based on the current frame image data of the input image signal and the direction of motion of the image detected by the motion detection unit.
  • the corrected image data output unit outputs the input image signal based on the current frame image data of the input image signal and the previous frame image data generation unit generated by the previous frame image data generation unit.
  • the image data of the current frame is corrected, and the corrected image data is output to the liquid crystal display device.
  • the motion detection unit detects the direction and speed of the image motion based on the image data of each frame of the image signal, and the direction of the image motion detected by the motion detection unit is the line direction. (Horizontal direction), the previous frame image data generation unit outputs the image data of the current frame of the input image signal in the line direction according to the direction and speed of the motion of the image detected by the motion detection unit. It is preferable to generate image data one frame before by shifting to.
  • the previous frame image data generator when the direction of motion of the image detected by the motion detector is a direction perpendicular to the line direction (vertical direction), the previous frame image data generator generates the input image
  • the image data of the previous frame is generated by changing the image data of each line of the current frame of the signal to a value between the original image data of the line and the image data of the previous line. Is preferred.
  • processing may be performed on the entire image data of the frame, but if only a part of the image displayed on the screen is a moving image, it corresponds to that part of the image It may be performed only on image data to be processed.
  • the image signal processing apparatus can be configured at low cost.
  • FIG. 1 is a diagram showing a configuration of an image signal processing apparatus 1 according to the present embodiment.
  • FIG. 2 is a diagram for explaining an example of corrected image data output from the corrected image data output unit 13 included in the image signal processing apparatus 1 according to the present embodiment.
  • FIG. 3 is a diagram for explaining an example of corrected image data output from the corrected image data output unit 13 included in the image signal processing apparatus 1 according to the present embodiment.
  • FIG. 4 is a diagram illustrating an example of corrected image data output from the corrected image data output unit 13 included in the image signal processing apparatus 1 according to the present embodiment.
  • FIG. 1 is a diagram showing a configuration of an image signal processing apparatus 1 according to the present embodiment.
  • the image signal processing device 1 processes the image data of each frame of the input image signal and then outputs the image signal to the liquid crystal display device 2.
  • the image signal processing device 1 outputs a motion detection unit 11, a previous frame image data generation unit 12, and A corrected image data output unit 13 is provided.
  • image data of one color will be described below, but the same applies to image data of other colors.
  • the motion detector 11 detects the direction of image motion based on the image data of each frame of the input image signal. In addition, it is preferable that the motion detection unit 11 detects the speed of motion in addition to the direction of motion of the image.
  • the motion detection unit 11 outputs the motion detection result to the previous frame image data generation unit 12.
  • the image that is subject to motion detection may be an image of the entire frame, or may be an image of a partial region of the entire image, and a background image that has no motion or is small. It may be an image with movement in the image.
  • ⁇ x and ⁇ y indicate the movement amount along each axis of the image in the two-dimensional coordinates
  • ⁇ t indicates the display cycle (reciprocal of the frame rate) of the images displayed in time series.
  • the previous frame image data generation unit 12 is based on the current frame image data G 2 (A 2 ) of the input image signal and the motion detection result (direction R and distance L or speed V) by the motion detection unit 11. generating the image data G 1 of the previous frame. For example, the area A 2 of the image data G 2 of the current frame is moved by the distance L in the ⁇ R direction. However, the image data G 1 (A 1 ) one frame before generated by the previous frame image data generation unit 12 is estimated from the image data G 2 (A 2 ) of the current frame and the motion of the image. However, when the image is moving at a constant speed in a certain direction, it is in good agreement with the actual image data one frame before.
  • Corrected image data output unit 13 based on the image data G 2 of the current frame of the input image signal, the previous frame image data generating unit 12 the image data G 1 of the previous frame produced by, is input Then, the image data G 2 of the current frame of the image signal is corrected, and the corrected image data is output to the liquid crystal display device 2.
  • the same overdrive technique as that of the prior art can be used.
  • the liquid crystal display device 2 an image is displayed based on the corrected image data G 2 ′ output from the corrected image data output unit 13. As a result, the actual display value in the liquid crystal display device 2 quickly reaches the target display value.
  • FIG. 2 and FIG. 3 are diagrams for explaining an example of the corrected image data output from the corrected image data output unit 13 included in the image signal processing apparatus 1 according to the present embodiment.
  • the direction of motion of the image detected by the motion detection unit 11 is the line direction, and the image is moving to the right.
  • the previous frame image data generation unit 12 shifts the image data of the current frame of the input image signal in the line direction according to the direction and speed of the motion of the image detected by the motion detection unit 11.
  • the image data of the previous frame is generated.
  • each figure (a)-(c) shows the pixel position on the line of a certain horizontal direction in the image of a frame.
  • Each Figure (a) shows the intensity distribution on the line of the image data G 2 of the current frame of the input image signal (luminance distribution).
  • Each Figure (b) shows the intensity distribution on the line of the previous frame image data generating unit 12 the image data G 1 of the previous frame generated by.
  • Each figure (c) shows the intensity distribution on the line of the corrected image data G 2 ′ output from the corrected image data output unit 13.
  • the image data G 1 of the previous frame generated by the previous frame image data generation unit 12 (each figure (b)) is the image data of the current frame of the input image signal. It is obtained by shifting G 2 (each figure (a)) to the left.
  • the shift amount corresponds to the speed of image movement, that is, the amount of image movement per frame.
  • the image data may be moved by the distance moved in the direction opposite to the moving direction of the image data of interest.
  • the image data G 2 of the target pixel in the current frame is smaller than the image data G 1 of the target pixel in the previous frame generated by the previous frame image data generation unit 12 (the same (A), (b)), the corrected image data G 2 ′ of the target pixel output from the corrected image data output unit 13 is set to a value smaller than the image data G 2 ((c) in the figure).
  • the actual display value in the liquid crystal display device 2 quickly reaches the target display value.
  • the image signal processing apparatus 1 may be configured at low cost because a storage unit with a small storage capacity may be used.
  • FIG. 4 is a diagram illustrating another example of the corrected image data output from the corrected image data output unit 13 included in the image signal processing apparatus 1 according to the present embodiment.
  • the direction of motion of the image detected by the motion detection unit 11 is the vertical direction perpendicular to the line direction, and the image is moving downward.
  • the intensity (value magnitude) of the image data is shown with the right direction of the line in FIG.
  • the previous frame image data generation unit 12 converts the image data G 2 of each line of the current frame of the input image signal into the original image data G 2 of the line and the image data G 1 of the previous line.
  • the image data G1 one frame before is generated.
  • FIGS. 9A to 9C represent pixel positions on a certain column (a pixel arrangement in a direction perpendicular to the line) in the frame image.
  • FIG (a) shows the distribution of luminance on the said column of the image data G 2 in the current frame of the image signal input by a solid line, and the corrected image output from the corrected image data output section 13 The distribution of the data G 2 ′ on the column is indicated by a broken line.
  • FIG. (B), (c) the the distribution of the said column of the previous frame image data generating unit 12 the image data G 1 of the previous frame is generated by a solid line.
  • a storage unit that stores image data for three lines is used.
  • the image signal processing apparatus 1 for each frame, the image data from the first line L 1 to the M line L M is input in the order of lines. M is the total number of lines.
  • the image data of each of the three lines L m + 2 to L m + 4 is stored in the storage unit.
  • the previous frame image data generator 12 as shown in FIG. (C)
  • line L m + 2 of the image data the line L m + 2 of the original image data G 2
  • m + 2 with the previous line by changing the value G 1, m + 2 between the image data G 1, m + 1 of the (upper line) L m + 1, and generates a one-frame preceding image data G 1, m + 2.
  • the corrected image data based on the image data G 1, m + 2 of the line L m + 2 whose value has been changed and the original image data G 2, m + 3 of the next line (lower line) L m + 3 G ′ 2, m + 2 is generated.
  • This overdrive technique can be used for this correction.
  • the previous frame image data generation unit 13 repeats the above processing every time image data for one line is input, so that the corrected image data G 2 as indicated by a broken line in FIG. 'Can be generated. Further, by using a storage unit that stores image data for three lines, it is possible to cope with not only the case where the image moves downward but also the case where the image moves downward. As described above, when the image is moving in the direction perpendicular to the line direction, the image signal processing apparatus 1 may use a storage unit that stores image data for three lines, and thus can be configured at low cost.
  • the present invention can be used for an image signal processing apparatus that processes image data of each frame of an input image signal and then outputs the image signal to a liquid crystal display device.

Abstract

L'invention porte sur un processeur de signal d'image (1), qui comprend une section de détection de mouvement (11), une section de génération de données d'image de trame précédente (12) et une section de sortie de données d'image corrigées (13). La section de détection de mouvement (11) détecte la direction du mouvement d'images dans des données d'image sur chaque trame d'un signal d'image devant être entré. La section de génération de données d'image de trame précédente (12) génère des données d'image sur la trame précédant d'une trame, en fonction de données d'image de la trame actuelle du signal d'image devant être entré et du résultat de la détection de mouvement par la section de détection de mouvement (11). La section de sortie de données d'image corrigées (13) corrige des données d'image sur la trame actuelle du signal d'image entré en fonction de données d'image (G2) sur la trame actuelle du signal d'image devant être entré et de données d'image (G1) sur la trame précédant d'une trame générées par la section de génération de données d'image de trame précédente (12), et délivre en sortie les données d'image corrigées à un dispositif d'affichage à cristaux liquides (2).
PCT/JP2009/050680 2008-01-17 2009-01-19 Processeur de signal d'image WO2009091063A1 (fr)

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JP2009550079A JP5222307B2 (ja) 2008-01-17 2009-01-19 画像信号処理装置

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JP2008-008231 2008-01-17

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004233949A (ja) * 2002-12-03 2004-08-19 Sharp Corp 液晶表示装置
JP2006091412A (ja) * 2004-09-24 2006-04-06 Victor Co Of Japan Ltd 画像処理装置
JP2006337448A (ja) * 2005-05-31 2006-12-14 Victor Co Of Japan Ltd 画像表示装置
JP2007071940A (ja) * 2005-09-05 2007-03-22 Seiko Epson Corp 表示用メモリ
JP2007079549A (ja) * 2005-09-12 2007-03-29 Lg Phillips Lcd Co Ltd 液晶表示装置の駆動装置及び駆動方法
JP2007129526A (ja) * 2005-11-04 2007-05-24 Seiko Epson Corp 動画像表示装置および動画像表示方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004233949A (ja) * 2002-12-03 2004-08-19 Sharp Corp 液晶表示装置
JP2006091412A (ja) * 2004-09-24 2006-04-06 Victor Co Of Japan Ltd 画像処理装置
JP2006337448A (ja) * 2005-05-31 2006-12-14 Victor Co Of Japan Ltd 画像表示装置
JP2007071940A (ja) * 2005-09-05 2007-03-22 Seiko Epson Corp 表示用メモリ
JP2007079549A (ja) * 2005-09-12 2007-03-29 Lg Phillips Lcd Co Ltd 液晶表示装置の駆動装置及び駆動方法
JP2007129526A (ja) * 2005-11-04 2007-05-24 Seiko Epson Corp 動画像表示装置および動画像表示方法

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JPWO2009091063A1 (ja) 2011-05-26

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