[go: up one dir, main page]

WO2013051466A1 - Dispositif d'affichage et procédé destiné à piloter ce dernier - Google Patents

Dispositif d'affichage et procédé destiné à piloter ce dernier Download PDF

Info

Publication number
WO2013051466A1
WO2013051466A1 PCT/JP2012/074975 JP2012074975W WO2013051466A1 WO 2013051466 A1 WO2013051466 A1 WO 2013051466A1 JP 2012074975 W JP2012074975 W JP 2012074975W WO 2013051466 A1 WO2013051466 A1 WO 2013051466A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
pixel
data
gradation
switching element
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2012/074975
Other languages
English (en)
Japanese (ja)
Inventor
佐々木　崇
石川　卓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Publication of WO2013051466A1 publication Critical patent/WO2013051466A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines in flat panels
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream
    • 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 a display device and a driving method thereof.
  • the liquid crystal display device is a hold-type display device that holds a display image for one frame period.
  • this hold-type display device it is known that the movement of an image is visually perceived as blurred (moving image blur) due to the characteristic of feeling an afterimage of human eyes.
  • Patent Document 1 discloses a configuration in which two source lines are provided for one pixel column and pixels adjacent in the column direction are connected to different source lines. In this configuration, two gate lines are selected at the same time, and data is simultaneously written into two corresponding pixel rows. Since two pixels adjacent in the column direction are connected to different source lines, different data can be written to the two pixels simultaneously.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2006-330640 (Released on Dec. 7, 2006)”
  • Patent Document 1 requires twice as many source lines as the pixel columns. Therefore, the number of outputs of the source driver is twice as many as the number of pixel columns. Therefore, there is a problem that the source driver becomes complicated and the cost becomes high.
  • the present invention realizes a liquid crystal display device capable of improving moving picture characteristics and reducing the cost while ensuring the charging time of the pixels.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made to conduct at different timings, different data is written to the first pixel and the second pixel, and the second frame following the first frame includes the second switching element.
  • a drive control unit that causes one switching element and the second switching element to conduct at the same timing and writes the same data to the first pixel and the second pixel; and the first frame The first pixel in the second frame according to the gradation of the first pixel in the first frame, the gradation of the second pixel in the first frame, and the gradation of the first pixel in the second frame.
  • an emphasis correction unit that determines emphasis-corrected data for writing.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the first pixel in the first frame is written.
  • the second frame according to the gray level of the second pixel in the first frame and the gray level of the first pixel in the second frame next to the first frame.
  • the emphasis-corrected data to be written to the first pixel is determined, and in the second frame, the first switching element and the second switching element are made conductive at the same timing, and the first pixel and the first pixel The same emphasized correction data is written to two pixels.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • the cost of the display device can be reduced.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made to conduct at different timings, different data is written to the first pixel and the second pixel, and the second frame following the first frame includes the second switching element.
  • One switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and the second frame after the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing, and a drive control unit that writes the same data to the first pixel and the second pixel;
  • Data that does not perform enhancement correction on the gradation of the first pixel in the second frame is used as data to be written in one pixel, and data that is written in the first pixel in the third frame is used as data to be written in the second frame.
  • an enhancement correction unit that uses data that is enhanced and corrected in accordance with the gradation of the first pixel and the gradation of the first pixel in the third frame.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the second second after the first frame is written.
  • data to be written to the first pixel in the frame data that does not perform enhancement correction on the gradation of the first pixel in the second frame is prepared.
  • the first switching element and the second switching element are turned on at the same timing, the same data is written to the first pixel and the second pixel, and in the third frame next to the second frame.
  • the data to be written to the first pixel data that is enhanced and corrected according to the gradation of the first pixel in the second frame and the gradation of the first pixel in the third frame is prepared, and the third pixel is prepared.
  • the first switching element and the second switching element are made conductive at the same timing, and the same data is written to the first pixel and the second pixel.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • excessive correction due to enhancement correction can be prevented, and generation of noise can be suppressed.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and in the second frame after the first frame, the first One switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the next frame of the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing, and the drive control unit that writes the same data to the first pixel and the second pixel, and the above-mentioned in the first frame,
  • An emphasis correction unit that determines emphasis-corrected data to be written to the first pixel in the third frame according to the gradation of the first pixel and the gradation of the first pixel in the third frame; It is characterized by providing.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and the second frame after the first frame is written.
  • the first switching element and the second switching element are made conductive at different timings, and different data is written to the first pixel and the second pixel.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • the cost of the display device can be reduced.
  • the display device includes first and second pixels, a first data signal line, and first and second switching elements, wherein the first pixel is connected to the first pixel via the first switching element.
  • the second pixel is connected to the first data signal line through the second switching element, and is connected to the first data signal line.
  • the first pixel is connected to the first data signal line.
  • the switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and in the second frame following the first frame, the first switching element And the second switching element at the same timing, and a drive control unit for writing the same data to the first pixel and the second pixel, and the first frame Writing to the first pixel in the second frame according to the gradation of the first pixel, the gradation of the second pixel in the first frame, and the gradation of the first pixel in the second frame. And an emphasis correction unit that determines data subjected to emphasis correction.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel passes through the first switching element.
  • the display device is connected to the first data signal line, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are turned on at different timings, different data is written to the first pixel and the second pixel, and the gradation of the first pixel in the first frame And the second pixel in the first frame and the gray level of the first pixel in the second frame next to the first frame.
  • Data for emphasis correction to be written to the pixel is determined, and in the second frame, the first switching element and the second switching element are made conductive at the same timing, and the first pixel and the second pixel are The same emphasized correction data is written into the same.
  • the display device includes first and second pixels, a first data signal line, and first and second switching elements, wherein the first pixel is connected to the first pixel via the first switching element.
  • the second pixel is connected to the first data signal line through the second switching element, and is connected to the first data signal line.
  • the first pixel is connected to the first data signal line.
  • the switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and in the second frame following the first frame, the first switching element And the second switching element are turned on at the same timing, the same data is written to the first pixel and the second pixel, and the third frame next to the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing and the same data is written in the first pixel and the second pixel, and the first frame in the second frame.
  • data to be written to the pixel data that does not perform enhancement correction on the gradation of the first pixel in the second frame is used, and as data to be written to the first pixel in the third frame, the data in the second frame is used.
  • an enhancement correction unit that uses data that is enhanced and corrected in accordance with the gradation of the first pixel and the gradation of the first pixel in the third frame.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel passes through the first switching element.
  • the display device is connected to the first data signal line, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are turned on at different timings, different data is written to the first pixel and the second pixel, and the second frame subsequent to the first frame
  • data to be written to the first pixel data that does not perform enhancement correction on the gradation of the first pixel in the second frame is prepared, and in the second frame, The first switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and the first frame is written in the third frame after the second frame.
  • data to be written to the pixels data that is enhanced and corrected according to the gradation of the first pixel in the second frame and the gradation of the first pixel in the third frame is prepared, and in the third frame, The first switching element and the second switching element are made conductive at the same timing, and the same data is written in the first pixel and the second pixel.
  • the display device includes first and second pixels, a first data signal line, and first and second switching elements, wherein the first pixel is connected to the first pixel via the first switching element.
  • the second pixel is connected to the first data signal line through the second switching element, and is connected to the first data signal line.
  • the first pixel is connected to the first data signal line.
  • the switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and in the second frame after the first frame, the first switching element And the second switching element are turned on at different timings, different data is written to the first pixel and the second pixel, and the third frame next to the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing, and the drive control unit writes the same data to the first pixel and the second pixel, and the first frame in the first frame.
  • An enhancement correction unit that determines enhancement-corrected data for writing to the first pixel in the third frame according to the gradation of one pixel and the gradation of the first pixel in the third frame; It is characterized by that.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel passes through the first switching element.
  • the display device is connected to the first data signal line, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are turned on at the same timing, the same data is written to the first pixel and the second pixel, and in the second frame after the first frame, The first switching element and the second switching element are brought into conduction at different timings, different data is written to the first pixel and the second pixel, and Enhancement correction for writing to the first pixel in the third frame according to the gradation of the first pixel in the first frame and the gradation of the first pixel in the third frame next to the second frame.
  • the first switching element and the second switching element are made to conduct at the same timing, and the same emphasized correction data is applied to the first pixel and the second pixel. It is characterized by writing.
  • FIG. 1 shows an example of emphasis correction
  • (a) shows the example of ideal emphasis correction
  • (b) is a case where emphasis correction is performed with reference to the gradation of the pixel of the upper row among two rows
  • (C) shows processing example 1 of one embodiment of the present invention in which enhancement correction is performed with reference to the average gradation of pixels in two rows.
  • FIG. 2 is a schematic diagram showing a configuration of the liquid crystal display device 1 according to the present embodiment.
  • the liquid crystal display device 1 includes a liquid crystal panel (display unit) LCP, a display control circuit DCC, a gate driver GD, a source driver SD, and a backlight BL.
  • the liquid crystal panel LCP is provided with a data signal line Sj, a scanning signal line Gi, a storage capacitor line (not shown), and a pixel P (i, j).
  • the gate driver GD drives the scanning signal line Gi
  • the source driver SD drives the data signal line Sj.
  • the display control circuit DCC has a GSP (gate start pulse), GCK (gate clock), GOE (gate on enable) signal, output data DATo, SSP according to the type of input data DATi (for 2D video or 3D video). (Source start pulse), SCK (source clock), and POL (source polarity) signals are generated.
  • the display control circuit DCC outputs the GSP, GCK, and GOE signals to the gate driver GD, and outputs the SSP, SCK, and POL signals to the source driver SD.
  • FIG. 3 shows a configuration example of the pixel P (i, j).
  • one pixel electrode PE is provided for one pixel, and the pixel electrode PE is connected to a data signal line Sj and a scanning signal line Gi via a transistor (switching element) Tr.
  • two pixel electrodes PEa and PEb are provided in one pixel, and the pixel electrode PEa is connected to the data signal line Sj and the scanning signal line Gi via the transistor Tra.
  • the pixel electrode PEb may be connected to the data signal line Sj and the scanning signal line Gi through the transistor Trb, or two pixel electrodes PEa per pixel as shown in FIG.
  • the pixel electrode PEa is connected to the data signal line Sj and the scanning signal line Gi via the transistor TR, and the pixel electrode PEa and the pixel electrode PEb It may be connected through a capacitor.
  • the pixel electrode holds a liquid crystal between the pixel electrode and a liquid crystal capacitor.
  • the liquid crystal panel has 768 lines (including 1366 display areas in one line).
  • One display area includes three pixels of RGB.
  • the frame data F1, F2, and F3 are input data corresponding to one 2D image (picture), respectively.
  • the liquid crystal display device 1 extracts a first row data group (row data for 384 rows of odd rows) from the frame data F1 and outputs first field data F1x.
  • the second field data F1y is generated by extracting the second row data group (the first row data and the 384 rows of even row data (a total of 385 rows of data)) from the frame data F1.
  • the liquid crystal display device 1 displays the image by writing the generated first and second field data F1x and F1y to the liquid crystal panel LCP in time division in order (F1x ⁇ F1y).
  • the frame rate of the frame data F1 is, for example, 60 fps (the input interval of the frame data F1 is 1/60 seconds).
  • the writing rate of each of the first and second field data F1x and F1y is 120 fps (the writing time of each field data is 1/120 seconds).
  • the liquid crystal display device 1 writes the first field data F1x to each pixel of the liquid crystal panel LCP in the first frame period (1/120 second period). Subsequently, in the second frame period (1/120 second period) following the first frame period, the liquid crystal display device 1 writes the second field data F1y to each pixel of the liquid crystal panel LCP.
  • the first field data F1x includes only the odd-numbered row data of the original frame data F1.
  • the second field data F1y includes only even-numbered row data and first-row row data of the original frame data F1.
  • FIG. 6 is a schematic diagram showing a scanning signal line selection method when the liquid crystal display device 1 writes the first field data F1x to the liquid crystal panel LCP.
  • the liquid crystal display device 1 simultaneously selects two consecutive scanning signal lines and writes the same row data to two pixel rows.
  • the transistor of each pixel is omitted.
  • the liquid crystal display device 1 simultaneously selects the scanning signal lines in the first row and the second row, and the first field data F1x of the first field data F1x is assigned to the pixels in the first row and the pixels in the second row.
  • the first field data F1x of the first field data F1x is assigned to the pixels in the first row and the pixels in the second row.
  • the scanning signal lines of the third row and the fourth row are simultaneously selected, and the pixels of the third row and the pixels of the fourth row are selected.
  • the second row data of the first field data F1x (the row data of the third row of the frame data F1) is written, and then the row data is sequentially written for every two pixel rows.
  • the liquid crystal display device 1 scans the scanning signal line of the (2N-1) th row (odd row) and the scanning signal of the next (2N) row (even row) in the first frame period. Select the line at the same time and write the same data.
  • the pixel P (1,1) and the pixel P (2,1) in the same pixel column are connected to the same data signal line S1 through transistors, and thus the same data is written to the two pixels. It is.
  • FIG. 7 is a schematic diagram showing a scanning signal line selection method when the liquid crystal display device 1 writes the second field data F1y to the liquid crystal panel LCP.
  • the liquid crystal display device 1 simultaneously selects two consecutive scanning signal lines and writes the same row data to two pixel rows.
  • the transistor of each pixel is omitted.
  • the liquid crystal display device 1 first selects only the scanning signal line of the first row, and the first row data (the first of the frame data F1) of the second field data F1y is selected for the pixels of the first row. Write line data). Next, the liquid crystal display device 1 selects the scanning signal lines in the second row and the third row at the same time, and applies the second row data (second field data F1y) to the pixels in the second row and the pixels in the third row. The second row data of the frame data F1 is written, and then the scanning signal lines of the fourth row and the fifth row are simultaneously selected, and the second field data is applied to the pixels of the fourth row and the pixels of the fifth row.
  • the third row data of F1y (fourth row data of the frame data F1) is written, and then the row data is sequentially written in two pixel rows.
  • N is a natural number
  • the liquid crystal display device 1 includes a scanning signal line for the (2N) th row (even number row) and a scanning signal line for the next (2N + 1) th row (odd number row).
  • the pixel P (2, 1) and the pixel P (3, 1) in the same pixel column are connected to the same data signal line S1 through transistors, and thus the same data is written to the two pixels. It is.
  • FIG. 8 shows the relationship between the image indicated by the frame data F1 and the images indicated by the first and second field data F1x and F1y, and the image indicated by the frame data F2 and the first and second field data F2x and F2y. It is a schematic diagram which shows the relationship with the image to show.
  • the number on the left side of each matrix represents the row number.
  • the data values (tones) are shown in black and white in FIG.
  • the frame data F1 and F2 respectively represent the pictures shown in FIG. 8 (images are displayed).
  • the first field data F1x is written in each pixel.
  • the pixels of the first row and the second row display an image indicated by the row data of the first row of the frame data F1.
  • the pixels in the third row and the fourth row display the image indicated by the row data in the third row of the frame data F1.
  • Second field data F1y is written in each pixel.
  • the pixels in the first row display the image indicated by the row data in the first row of the frame data F1.
  • the pixels in the second row and the third row display the image indicated by the row data in the second row of the frame data F1.
  • the first field data F2x is written to each pixel.
  • the pixels of the first row and the second row display an image indicated by the row data of the first row of the frame data F2.
  • the pixels in the third row and the fourth row display the image indicated by the row data in the third row of the frame data F2.
  • Second field data F2y is written to each pixel.
  • the pixels of the first row display the image indicated by the row data of the first row of the frame data F2.
  • the pixels in the second row and the third row display the image indicated by the row data in the second row of the frame data F2.
  • the liquid crystal display device 1 thus generates first field data F1x mainly composed of odd-numbered rows and second field data F1y mainly composed of even-numbered rows from the frame data F1 indicating one 2D image, Each field data is continuously written in the liquid crystal panel LCP.
  • the display time of one field data F1x / F1y is 1/120 second (because it is the same as the double speed driving), the moving image characteristics can be improved.
  • the pixel writing time is halved, the pixel charging time is shortened, resulting in a problem of insufficient charging.
  • each field data is written in 1/120 seconds, but writing is performed for each two pixel rows, so that frame data is written for each row in 1/60 seconds.
  • the pixel charging time can be secured as much as the case.
  • first row data and even row 384 rows of data are extracted from the frame data F1 as the second row data group in order to generate the second field data F1y.
  • the line data for 384 lines including only even lines may be extracted from the frame data F1 as the second line data group.
  • the same row data (row data of the second row of F1) is written to the first to third rows. Can be.
  • FIG. 10 is a schematic diagram showing a reference relationship when normal overdrive driving is applied to the liquid crystal display device 1 of the present embodiment.
  • FIG. 10 shows the data of the first to sixth rows of the continuous first to third frames.
  • the first frame is a frame for writing the first field data F1x (odd row data)
  • the second frame is the frame for writing the second field data F1y (first row + even row data)
  • the third frame is the first field.
  • a frame for writing data F2x (odd row data) is used.
  • In the first frame and the second frame two rows in which the same data is written are shifted.
  • the second frame and the third frame two rows in which the same data is written are shifted.
  • the enhancement correction data in the second row of the second frame should be generated with reference to the data in the second row of the first frame.
  • the enhancement correction data in the third row of the second frame should be generated with reference to the data in the third row of the first frame.
  • the second frame is based on the difference between the second row and the third row of the first frame. Emphasis correction data to be written in the second row and the third row is generated.
  • the enhancement correction (overdrive) cannot be appropriately performed on the pixels in the third row. For this reason, a calculation error of emphasis correction occurs for the pixels in the third row, and the emphasis correction may be excessive. Pixels that have undergone excessive emphasis correction are likely to be visually recognized as noise. This can occur between frames in which pixel rows for simultaneous writing are shifted.
  • both the second row data and the third row data of the first frame are referred to, and the representative values (for example, an average value) is determined, and enhancement correction data to be written in the second row and the third row of the second frame is generated based on the difference from the representative value.
  • the liquid crystal display device 1 can reduce the calculation error of the enhancement correction and suppress excessive enhancement correction by using, for example, the average value of the two data as a reference value for enhancement correction.
  • FIG. 1 is a block diagram illustrating a configuration of a display control unit 10 included in the liquid crystal display device 1 according to the present embodiment.
  • the display control unit 10 includes a data generation unit (data conversion unit) 11, a first line memory 12, a frame memory 13, a second line memory 14, a reference gradation determination unit (enhancement correction unit) 15, and an enhancement correction determination unit (emphasis). Correction unit) 16, LUT 17, and drive control unit 18.
  • the display control unit 10 corresponds to the display control circuit DCC, the source driver SD, and the gate driver GD shown in FIG.
  • the data generation unit 11 sequentially receives frame data indicating an image as input data.
  • the data generation unit 11 extracts odd-numbered or even-numbered line data from the frame data, and generates first and second field data.
  • the first field data is composed of odd-numbered row data of the frame data
  • the second field data is composed of row data of the first and even-numbered rows of frame data.
  • the data generation unit 11 sequentially outputs the first field data and the second field data to the first line memory 12 and the frame memory 13 at a rate twice the frame rate of the frame data.
  • the first line memory accumulates the line data for one line in which the field data is input, and outputs the line data for one line to the enhancement correction determination unit 16.
  • the frame memory 13 stores the input data for one frame, that is, one field data and delays it by one frame, and then sends the row data for each row to the second line memory 14 and the reference gradation determination unit 15. Output.
  • the second line memory 14 stores the row data for one row to which the field data is input and delays it by one row, and then outputs the row data for one row to the reference gradation determination unit 15.
  • the reference gradation determination unit 15 receives row data of two consecutive rows one frame before from the frame memory 13 and the second line memory 14, respectively.
  • the row data input to the reference tone determination unit 15 corresponds to the frame immediately before the frame of the row data input to the first line memory 12.
  • the reference gradation determination unit 15 obtains an average value of gradations indicated by the two row data for each column, and determines the average value as a reference gradation for each column.
  • the reference gradation determination unit 15 outputs the determined reference gradation to the enhancement correction determination unit 16.
  • the enhancement correction determination unit 16 determines the current frame based on the gradation indicated by the row data of the current frame received from the first line memory 12 and the reference gradation corresponding to the immediately preceding frame received from the reference gradation determination unit 15. Emphasis correction data to be written to the pixel corresponding to the row data is determined. As described above, since the liquid crystal display device 1 writes the same data to the pixels in two consecutive rows, the pixels corresponding to the row data are pixels for two rows to be simultaneously written. Specifically, the emphasis correction determination unit 16 refers to the LUT 17 and determines the emphasis-corrected data according to the gradation indicated by the data of the current frame (the gradation of the current frame) and the reference gradation.
  • the LUT 17 stores two-dimensional table data with two arguments, the gradation of the current frame and the reference gradation corresponding to the gradation of the previous frame.
  • FIG. 12 is a diagram illustrating an example of table data of the LUT 17.
  • table values are shown for only some representative gradations, and others are omitted.
  • the enhancement correction determination unit 16 indicates the gradation is 125.
  • the data is corrected and corrected.
  • the emphasis correction determination unit 16 outputs the emphasis-corrected data determined for one line to the drive control unit 18.
  • the drive control unit 18 receives the data subjected to the enhancement correction for one row, and writes the same data subjected to the enhancement correction for the pixels in two consecutive rows.
  • the drive control unit 18 particularly controls the source driver SD and the gate driver GD to write data to the pixels.
  • the reference gradation determination unit 15 performs the first row data of the first field data corresponding to the first frame (row data indicating the gradation of the pixels in the first row and the second row). And the second row data of the first field data (row data indicating the gradation of the pixels in the third row and the fourth row) are received.
  • the reference gradation determining unit 15 uses an average value C of the gradation A of the pixels in the first and second rows of the first frame and the gradation B of the pixels in the third and fourth rows as a reference gradation. Ask.
  • the enhancement correction determination unit 16 refers to the LUT 17 and refers to the reference gradation (the average value of the gradations of the pixels in the second and third rows of the first frame) and the gradation of the target pixel in the current frame (the second frame).
  • the gradation corrected data corresponding to the gradations of the pixels in the second row and the third row) are determined. By simultaneously writing this corrected data to the pixels of the second row and the third row in the second frame, the calculation error of the enhancement correction is reduced, and the two pixels that are simultaneously written have a more appropriate gradation. Can be.
  • the reference gradation (the average value of the gradations of the pixels in the third and fourth rows of the second frame) and the gradation of the target pixel in the third frame (the third frame of the third frame).
  • the gradation corrected data corresponding to the gradations of the pixels in the 3rd and 4th rows) is specified. Then, the corrected data is simultaneously written into the pixels in the third row and the fourth row in the third frame.
  • the average value of the gradations of the two pixels in the immediately preceding frame is obtained as the reference gradation, and the reference gradation and the current
  • data indicating the gradation subjected to enhancement correction to be written in the two pixels is determined.
  • FIG. 13 is a diagram illustrating an example of enhancement correction.
  • FIG. 13A illustrates an example of ideal enhancement correction
  • FIG. 13B illustrates pixel levels in the upper row of the two rows.
  • FIG. 13C shows a processing example 1 of this embodiment in which enhancement correction is performed with reference to the average gradation of pixels in two rows.
  • the gradation of the pixels in the Nth row in the previous frame is 32, and the gradation of the pixels in the N + 1th row is 96.
  • the liquid crystal display device 1 writes the same data to the pixels in the Nth row and the N + 1th row in the current frame. If the pixels in the Nth row and the (N + 1) th row in the current frame are to have the same gradation 128 (when the gradation indicated by the field data is 128), ideally, as shown in FIG. Data with enhanced correction of gradation 202 should be written to the pixels in the row, and data with enhanced correction of gradation 153 should be written into the pixels in the (N + 1) th row (see FIG. 12).
  • the liquid crystal display device 1 must write the same data to the pixels in the Nth and N + 1th rows in the current frame. Therefore, as in the reference example shown in FIG. 13B, for example, when enhancement correction is performed with reference to the gradation of the upper pixel of the previous frame, the gradation of the corrected data becomes the upper pixel. However, it is an inappropriate value (overcorrected or undercorrected value) for the lower pixel.
  • the average value of the gradations of the pixels in the Nth and N + 1th rows is used as the reference gradation, and the reference gradation and the gradation of the current frame are determined.
  • the data corrected for emphasis is determined.
  • the pixel in the Nth row is slightly insufficiently emphasized, but the overcorrection of the pixel in the (N + 1) th row is reduced.
  • the calculation error of the enhancement correction can be reduced and the excessive correction can be prevented. As a result, visible noise can be reduced.
  • the average value of the gradations of the two pixels in the previous frame is obtained as the reference gradation, but the present invention is not limited to this.
  • a value between the gradations of two pixels in the previous frame can be set as the reference gradation.
  • the reference tone determination unit 15 selects a brighter tone among the tones of the two pixels in the previous frame.
  • a reference gradation may be used.
  • one of the two target pixels is moderately emphasized and corrected because the gradation of the previous frame is the reference gradation. Since the gradation of the previous frame is darker than the reference gradation, the other pixel is darker than the gradation of the pixel indicated by the field data.
  • the human eye has a characteristic that it is easier to visually recognize brighter noise than darker noise. Therefore, as described above, by using a brighter gradation as the reference gradation, it is possible to prevent noise that is overcorrected and becomes brighter.
  • the reference gradation determination unit 15 selects a darker gradation among the gradations of the two pixels in the previous frame. It is good.
  • the enhancement correction parameter when the brightness changes from the previous frame is set in advance weaker than the enhancement correction parameter shown in FIG.
  • the enhancement-corrected gradation in the case of gradation 32 of the previous frame and gradation 128 of the current frame is 202, but this enhancement-corrected gradation is set to 160, for example. Keep it. In this way, overcorrection can be reduced.
  • the reference gradation determination unit 15 determines the difference between the gradation of the current frame and the gradation of the two pixels of the previous frame. The smaller one may be used as the reference gradation. In this case, one of the two target pixels is moderately emphasized and corrected because the gradation of the previous frame is the reference gradation. The other pixel has insufficient enhancement correction because the difference between the gradation of the current frame and the gradation of the previous frame is greater than the difference between the gradation of the current frame and the reference gradation. Therefore, overcorrection can be prevented. Therefore, the occurrence of abnormal display (noise) due to overcorrection can be prevented. In this case, as shown in FIG. 14, the reference tone determination unit 15 receives the row data of the current frame from the data generation unit 11, and the tone indicated by the data of the current frame and the tone indicated by the data of the previous frame. And compare.
  • the reference gradation determination unit 15 determines the difference between the gradation of the current frame and the gradation of the two pixels of the previous frame.
  • the larger one may be used as the reference gradation.
  • the enhancement correction parameter is set to be weaker in advance (so that the correction is insufficient) than the enhancement correction parameter shown in FIG.
  • the reference gradation determination unit 15 determines that one of the gradations of the two pixels in the previous frame is greater than the gradation in the current frame. If the other is brighter and darker than the gradation of the current frame, the enhancement correction determination unit 16 may be instructed not to perform enhancement correction.
  • the reference gradation determination unit 15 sets the gradation of the current frame as the reference gradation, or outputs a special value to the enhancement correction determination unit 16 so that the enhancement correction determination unit 16 does not perform enhancement correction (emphasis correction is performed).
  • the enhancement correction determination unit 16 can be instructed so that the gradation indicated by the data becomes the same as the gradation of the current frame.
  • the enhancement correction determination unit 16 obtains the absolute value of the difference between the gradation indicated by the data subjected to enhancement correction for each pixel and the gradation of the current frame as a correction value, and calculates the correction value D1 of the target pixel (two ) The correction value D2 of the adjacent pixel in the row direction or column direction of the target pixel is compared. When the correction value D1 of the target pixel is larger than the representative correction value D2 + of the adjacent pixel and a predetermined positive threshold C1 (when D1 ⁇ D2> C1), the enhancement correction determination unit 16 determines that the correction value D1 of the target pixel is equal to or less than the upper limit value.
  • the correction value of the target pixel may be modified so that For example, the upper limit value may be D2 + C1, or another value.
  • This process may be executed by the enhancement correction determination unit 16 after obtaining the corrected data of each pixel (all pixels) in the current frame.
  • the representative correction value D2 of the adjacent pixel may be an average value or a maximum value of correction values of a plurality of pixels adjacent to the target pixel.
  • the representative correction value of the peripheral pixels in a predetermined range around the target pixel may be used. In a normal moving image, it is unlikely that the enhancement correction is strong at only one location compared to the adjacent pixels or the peripheral pixels.
  • 3D image display operation 15 and 16 show a method for displaying 3D video data in the liquid crystal display device 1.
  • the liquid crystal panel has 768 lines (including 1366 display areas in one line).
  • One display area includes three pixels of RGB.
  • the frame data L1 and R1 are input data corresponding to one left-eye image and right-eye image, respectively.
  • a set of frame data L1 and R1 corresponds to one stereoscopic image (picture).
  • the liquid crystal display device 1 extracts the first row data group (the row data of 384 rows of odd rows) from the frame data L1 and generates the first field data L1x from the frame data L1 for the left eye.
  • a second row data group (first row data and 384 rows of even row data (a total of 385 rows of data)) is extracted from the data L1 to generate third field data L1y.
  • the liquid crystal display device 1 extracts the third row data group (row data for 384 rows of odd rows) from the frame data R1 to generate the second field data R1x for the frame data R1 for the right eye.
  • the fourth row data group (the data of the first row and the row data of 384 rows of even-numbered rows (data of a total of 385 rows)) is extracted from the frame data R1 to generate the fourth field data L1y.
  • the liquid crystal display device 1 then generates the generated first to fourth field data L1x, R1x, L1y, and R1y in this order twice (L1x ⁇ L1x ⁇ R1x ⁇ R1x ⁇ L1y ⁇ L1y ⁇ R1y ⁇ R1y). ) To the liquid crystal panel LCP in a time-sharing manner to display a stereoscopic image.
  • the frame rate of the frame data L1 and R1 is, for example, 60 fps (the input intervals of the frame data L1 and R1 are each 1/60 seconds).
  • the writing rate of each of the first to fourth field data L1x, R1x, L1y, and R1y to the liquid crystal panel LCP is 240 fps (the writing time for each field data is 1/240 seconds).
  • the continuous first to eighth frame periods are each 1/240 seconds.
  • the liquid crystal display device 1 writes the first field data L1x to each pixel of the liquid crystal panel LCP in the first frame period, and writes the first field data L1x once again to each pixel of the liquid crystal panel LCP in the next second frame period. .
  • the liquid crystal display device 1 writes the second field data R1x to each pixel of the liquid crystal panel LCP, and in the next fourth frame period, the second field data R1x is once again written to each pixel of the liquid crystal panel LCP. Write to.
  • the liquid crystal display device 1 writes the third field data L1y to each pixel of the liquid crystal panel LCP, and in the next sixth frame period, the third field data L1y is once again written to each pixel of the liquid crystal panel LCP.
  • the liquid crystal display device 1 writes the fourth field data R1y to each pixel of the liquid crystal panel LCP in the next seventh frame period, and once again writes the fourth field data R1y to each pixel of the liquid crystal panel LCP in the next eighth frame period. Write to.
  • the first field data L1x includes only the odd-numbered row data of the original frame data L1.
  • the second field data R1x includes only the odd-numbered row data of the original frame data R1.
  • the third field data L1y includes only even-numbered row data and first-row row data of the original frame data L1.
  • the fourth field data R1y includes only even-numbered row data and first-row row data of the original frame data R1.
  • the backlight is turned on from the second half of the second frame period (second writing of the first field data L1x) to the first half of the third frame period (first writing of the second field data R1x).
  • the left eye part of the 3D shutter glasses so as to include the ON period, the user is made to recognize the display state of L1x. Since the response of the liquid crystal of the pixel is delayed with respect to the writing of the image for the left eye to the pixel, the timing for opening the left eye part is also delayed here.
  • the backlight is turned on from the second half of the fourth frame period (second writing of the second field data R1x) to the first half of the fifth frame period (first writing of the third field data L1y), and this backlight ON period By opening the right eye part of the 3D shutter glasses so as to include, the user is made to recognize the display state of R1x.
  • the backlight is turned on from the second half of the sixth frame period (the second writing of the third field data L1y) to the first half of the seventh frame period (the first writing of the fourth field data R1y), and this backlight ON period By opening the left eye part of the 3D shutter glasses so as to include, the user is made to recognize the display state of L1y.
  • the backlight is turned on from the second half of the eighth frame period (second writing of the fourth field data R1y) to the first half of the next frame period (first writing of the first field data L2x corresponding to the next frame data L2). Then, by opening the right eye part of the 3D shutter glasses so as to include the ON period of the backlight, the user is made to recognize the display state of R1y. Thus, the user recognizes one stereoscopic image by continuously recognizing the display state of the field data L1x, R1x, L1y, and R1y.
  • L1x and R1x are written twice in total, 1536 rows of data are written in 1/60 seconds, and L1y and R1y are written twice in total, 1540 rows of data in 1/60 seconds.
  • the write time for one row data can be secured about 10.8 microseconds.
  • the left-eye field data and the right-eye field data are written twice to suppress crosstalk, and image disturbance due to insufficient charging of pixels can be suppressed.
  • the writing time of one row data can be secured for about 10.8 microseconds, crosstalk is suppressed even in a liquid crystal panel for double speed driving (lower cost than a liquid crystal panel for quadruple speed driving). High-quality 3D display is possible.
  • FIG. 17 shows the relationship between the image indicated by the left eye frame data L1 and the images indicated by the first and third field data F1x and F1y, and the image indicated by the right eye frame data R1 and the second and fourth. It is a schematic diagram which shows the relationship with the image which field data R1x * R1y shows.
  • the number on the left side of each matrix represents the row number.
  • the data values (tones) are shown in black and white in FIG.
  • the frame data L1 and R1 each represent the picture shown in FIG. 17, the data is written to each pixel in the order of (1) to (8) shown in FIG. 17 (an image is displayed).
  • the display process of the present embodiment is similar to the display process shown in FIG. 8 of the first embodiment, except that the same image is written twice in succession.
  • the liquid crystal display device 1 in this way, from the set of frame data L1 and R1 indicating a 3D image, the left eye first field data L1x mainly composed of odd-numbered data and the right eye mainly composed of odd-numbered data.
  • Second field data R1x for the left eye, third field data L1y for the left eye mainly composed of even-numbered data, and fourth field data R1y for the right eye mainly composed of even-numbered data are generated twice.
  • Each field data is sequentially written to the liquid crystal panel LCP.
  • the display time of one field data L1x, L1y, R1x, and R1y is about 1/240 seconds (depending on the backlight lighting period), the moving image characteristics can be improved.
  • each field data is written in 1/240 seconds, but writing is performed for each two pixel rows, so that frame data is written for each row in 1/120 seconds.
  • the pixel charging time can be secured as much as the case.
  • the image indicated by the odd-numbered row data and the image indicated by the even-numbered row data are alternately displayed for the respective eyes, so that the original frame data indicates in a pseudo manner.
  • a high-resolution image can be displayed.
  • the display control unit 10 has the same configuration as that shown in FIG. 14 of the first embodiment. However, in the present embodiment displaying a 3D image, as shown in FIG. 18, the pixel rows in which the same data is simultaneously written from the first to the fourth frame cannot be shifted. Therefore, for writing in the second frame, the third frame, and the fourth frame, enhancement correction may be performed with reference to the gradation of the same pixel in the previous frame for each pixel as usual. Similarly, with respect to writing in the sixth frame, the seventh frame, and the eighth frame, enhancement correction may be performed for each pixel with reference to the gradation of the same pixel in the previous frame as usual. Note that since the same data is displayed in the first frame and the second frame, it is not necessary to perform enhancement correction in writing in the second frame. Similarly, it is not necessary to perform enhancement correction in the fourth frame, the sixth frame, and the eighth frame.
  • one pixel row in which the same data is simultaneously written is shifted. Therefore, in the fifth frame, as in the first embodiment, for the two pixels (for example, the pixels in the second row and the third row) to be simultaneously written, the same two pixels (the second row and the third row) in the immediately preceding fourth frame are used.
  • the gradation of the pixels in the third row) is averaged, and enhancement correction is performed with reference to the average value.
  • the specific processing is the same as in the first embodiment, and instead of using the average value, a brighter gradation among the gradations of the same two pixels in the immediately preceding frame may be used as a reference gradation. .
  • the eighth frame and the next ninth frame (the frame in which the first field data L2x of the next left-eye frame data L2 is written), one pixel row in which the same data is simultaneously written is shifted. Therefore, also in the ninth frame, as in the fifth frame, enhancement correction is performed using the average value of the gradation of the same two pixels as a reference gradation.
  • the gray level of the same two pixels in the immediately preceding frame is averaged in a frame in which the pixel row in which the same data is simultaneously written to the immediately preceding frame is shifted.
  • enhancement correction may be performed with reference to the gradation of the same pixel in the previous frame for each pixel as usual.
  • enhancement correction is performed with reference to the gradation of the same pixel in the previous frame (the gradation of one of the pixels) as usual for each pixel. Just do it.
  • the enhancement correction is turned off for the frames (first, fifth, ninth frames, etc.) in which the pixel rows in which the same data is simultaneously written with respect to the immediately preceding frame are shifted. Noise is less visible when the enhancement correction is not performed than when the enhancement correction is performed and the overcorrection is performed. Therefore, by temporarily turning off the enhancement correction at the timing when the pixel rows in which the same data is simultaneously written are shifted, overcorrection can be prevented and the generation of noise can be suppressed.
  • FIG. 19 is a block diagram illustrating a configuration related to the display control unit 20 included in the liquid crystal display device 1 according to the present embodiment.
  • the display control unit 20 includes a data generation unit (data conversion unit) 21, a first line memory 12, a frame memory 13, a reference tone determination unit (enhancement correction unit) 15, an enhancement correction determination unit (enhancement correction unit) 22, and an LUT 17. And a drive control unit 18.
  • the display control unit 20 corresponds to the display control circuit DCC, the source driver SD, and the gate driver GD shown in FIG.
  • the data generation unit 21 sequentially receives left-eye and right-eye frame data indicating a 3D image as input data.
  • the data generation unit 21 extracts odd-numbered or even-numbered line data from the left-eye and right-eye frame data, and generates first to fourth field data.
  • the data generation unit 21 sequentially outputs the first field data to the fourth field data twice to the first line memory 12 and the frame memory 13 at a rate four times the frame rate of the frame data. Further, the data generation unit 21 outputs a control signal indicating that the enhancement correction is valid to the enhancement correction determination unit 22 while outputting the first field data for the first time and the third field data for the first time to the first line memory 12. .
  • the data generation unit 21 generates other field data (second first field data, first and second second field data, second third field data, first and second fourth field data). ) Is output to the first line memory 12, a control signal indicating that the emphasis correction is invalid is output to the emphasis correction determination unit 22.
  • the enhancement correction determination unit 22 receives a control signal from the data generation unit 21.
  • the enhancement correction determination unit 22 performs enhancement correction when the control signal indicates that enhancement correction is effective.
  • normal enhancement correction may be performed with reference to the gradation of one of the pixels in the immediately preceding frame.
  • the enhancement correction is effective in the second to fourth frames and the sixth to eighth frames shown in FIG.
  • the enhancement correction determination unit 22 does not perform the enhancement correction when the control signal indicates that the enhancement correction is invalid. In this case, since the pixel row in which the same data is simultaneously written with respect to the immediately preceding frame is shifted, the enhancement correction is not performed. Emphasis correction is disabled in the first, fifth, and ninth frames shown in FIG.
  • the data generation unit 21 outputs a control signal indicating that weak enhancement correction is performed to the enhancement correction determination unit 22, and the other A control signal indicating that strong emphasis correction is performed in the frame may be output.
  • the emphasis correction determination unit 22 performs strong (normal) emphasis correction using the first table data stored in the LUT 17.
  • the enhancement correction determination unit 22 performs weak enhancement correction using the second table data stored in the LUT 17. In the second table data, the enhancement correction parameter is set weaker than that in the first table data.
  • overcorrection is performed by performing weak emphasis correction with reference to the gradation of any pixel in the immediately preceding frame in a frame in which the pixel row to which the same data is written simultaneously shifts from the immediately preceding frame. Can be prevented, and generation of noise that is easily visible can be suppressed.
  • FIG. 21 is a block diagram illustrating a configuration related to the display control unit 30 included in the liquid crystal display device 1 according to the present embodiment.
  • the display control unit 30 includes a data generation unit (data conversion unit) 21, a first line memory 12, a frame memory 13, a second frame memory 23, a reference gradation determination unit (enhancement correction unit) 24, and an enhancement correction determination unit (enhancement). Correction unit) 25, LUT 17, and drive control unit 18.
  • the display control unit 30 corresponds to the display control circuit DCC, the source driver SD, and the gate driver GD shown in FIG.
  • the data generation unit 21 generates the first to fourth field data as in the third embodiment.
  • the data generation unit 21 outputs the row data of each field data to the first line memory 12, the frame memory 13, and the second frame memory 23.
  • the data generation unit 21 outputs a control signal indicating the first value to the reference gradation determination unit 24 while outputting the first first field data and the first third field data to the first line memory 12. Output. In addition, the data generation unit 21 generates other field data (second first field data, first and second second field data, second third field data, first and second fourth field data). ) Is output to the first line memory 12, a control signal indicating the second value is output to the reference gradation determination unit 24.
  • the second frame memory 23 delays the input row data by 5 frames, and outputs the row data to the reference gradation determination unit 24.
  • the reference tone determination unit 24 receives a control signal from the data generation unit 21. When the control signal indicates the second value, the reference gradation determination unit 24 sets the gradation indicated by the data in the immediately previous frame received from the frame memory 13 as the reference gradation. When the control signal indicates the first value, the reference gradation determination unit 24 sets the gradation indicated by the data in the frame 5 frames before received from the second frame memory 23 as the reference gradation. The reference tone determination unit 24 outputs the reference tone to the enhancement correction determination unit 25.
  • the enhancement correction determination unit 25 performs enhancement correction with reference to the LUT 17 based on the received reference gradation and the gradation of the data of the current frame input from the first line memory 12.
  • FIG. 22 is a schematic diagram showing a relationship of data referred to for emphasis correction in the present embodiment.
  • the ninth frame is a frame for writing the first field data L2x for the first time of the frame data L2.
  • the eighth and ninth frames have different (shifted) pixel rows in which the same data is written simultaneously.
  • the gradation of the eighth frame which is the immediately preceding frame, is used to perform enhancement correction in a frame in which the pixel rows in which the same data is written simultaneously with respect to the immediately preceding frame are shifted (for example, the ninth frame).
  • the gradation of the same pixel in the fourth frame which is the frame five frames before, is referred to.
  • the eighth frame and the fourth frame pixel rows in which the same data is written at the same time are not shifted.
  • the eighth frame, which should be referred to originally by the ninth frame, and the fourth frame are frames for writing the same field data for the right eye.
  • the second row data of the original frame data R1 is written in the third row of pixels
  • the fourth row of pixels in the original frame data R1 is written. Four lines of data are written.
  • the data of the third row of the original frame data R1 is written in the pixels of the third row and the fourth row in the fourth frame.
  • the data of the third row of the original frame data R1 written to the pixels of the third row and the fourth row in the fourth frame is the same as that of the original frame data R1 written to the pixels of the third row in the eighth frame. This is pixel data between two rows of data and the fourth row of original frame data R1 written to the pixels of the fourth row.
  • the gradation of the third row of the frame data R1 is likely to be similar to the gradation of the second row of the frame data R1 and the gradation of the fourth row of the frame data R1, and There is a high possibility that the gradation is between the gradation of the second row of the frame data R1 and the gradation of the fourth row of the frame data R1.
  • the enhancement correction may be performed with reference to the gradation of the same pixel in the third frame 6 frames before, for example, 5 frames before.
  • the gradation of each pixel of the left-eye image and the right-eye image is considered to be similar, in the ninth frame, for example, refer to the gradation of the same pixel in the second to first frames 7 to 8 frames before
  • the emphasis correction may be performed.
  • the liquid crystal display device is described as an example.
  • the present invention is not limited to this, and the present invention writes a potential corresponding to data in the capacitance of the pixel and performs display according to the potential (for example, It can be applied to an organic / inorganic EL display device.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made to conduct at different timings, different data is written to the first pixel and the second pixel, and the second frame following the first frame includes the second switching element.
  • a drive control unit that causes one switching element and the second switching element to conduct at the same timing and writes the same data to the first pixel and the second pixel; and the first frame In accordance with the gradation of the first pixel in the first frame, the gradation of the second pixel in the first frame, and the gradation of the first pixel in the second frame, writing to the first pixel in the second frame And an emphasis correction unit for determining data subjected to emphasis correction.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the first pixel in the first frame is written.
  • the second frame according to the gray level of the second pixel in the first frame and the gray level of the first pixel in the second frame next to the first frame.
  • the emphasis-corrected data to be written to the first pixel is determined, and in the second frame, the first switching element and the second switching element are made conductive at the same timing, and the first pixel and the first pixel The same emphasized corrected data is written to two pixels.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • the cost of the display device can be reduced.
  • the enhancement correction unit includes a reference gradation determination unit that determines a reference gradation according to the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame; An enhancement correction determination unit that determines the enhancement-corrected data to be written to the first pixel in the second frame according to the reference gradation and the gradation of the first pixel in the second frame.
  • the structure provided may be sufficient.
  • the reference gradation may be a value between the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame.
  • the reference gradation may be an average value of the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame.
  • the reference gradation determination unit may be configured such that, out of the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame, the gradation of the first pixel in the second frame.
  • a configuration may be employed in which a gradation with a smaller difference is determined as the reference gradation.
  • the reference gradation determination unit may be configured such that, out of the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame, the gradation of the first pixel in the second frame. A configuration in which a gradation having a larger difference from the above is determined as the reference gradation.
  • the reference gradation determination unit determines a brighter gradation as the reference gradation among the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame. It may be a configuration.
  • the reference gradation determining unit determines a darker gradation as the reference gradation among the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame. It may be a configuration.
  • the enhancement correction unit may be configured such that one of the gradation of the first pixel in the first frame and the gradation of the second pixel in the first frame is one of the gradation of the first pixel in the second frame.
  • the gradation indicated by the enhancement-corrected data is the gradation of the first pixel in the second frame.
  • the configuration may be such that the data subjected to enhancement correction is determined.
  • the enhancement-corrected data represents an enhancement-corrected gradation, and a difference between a gradation of a pixel in the second frame and a gradation represented by the enhancement-corrected data regarding the pixel in the second frame.
  • the enhancement correction determination unit calculates the correction value of the first pixel in the second frame and the correction value of a plurality of pixels adjacent to the first pixel.
  • the difference from the representative value is larger than a predetermined threshold
  • the enhancement-corrected data regarding the first pixel in the second frame so that the correction value of the first pixel in the second frame is equal to or less than an upper limit value.
  • the configuration may be changed.
  • the enhancement-corrected data represents an enhancement-corrected gradation, and a difference between a gradation of a pixel in the second frame and a gradation represented by the enhancement-corrected data regarding the pixel in the second frame.
  • the enhancement correction determination unit includes a plurality of correction values positioned in a predetermined range around the first pixel and the correction value of the first pixel in the second frame.
  • the correction value of the first pixel in the second frame is set to be equal to or less than the upper limit value in the second frame.
  • a configuration may be used in which the data subjected to the enhancement correction is changed.
  • the drive control unit causes the first switching element and the second switching element to conduct at the same timing, and the first pixel and the second pixel
  • the enhancement correction unit determines the enhancement-corrected data to be written to the first pixel in the second frame using the first table, and the enhancement is stronger than the first table.
  • a configuration may be used in which enhancement-corrected data for writing to the first pixel in the third frame is determined using a second table for correction.
  • the display device includes a third pixel connected to the first data signal line via a third switching element, and the first pixel, the second pixel, and the third pixel are arranged in this order.
  • the data corresponding to the first pixel in the frame data representing one image is the gradation of the first pixel
  • the data corresponding to the third pixel in the frame data is the data of the first pixel and the second pixel. It may be configured to further include a data conversion unit for gradation.
  • the display device for the first eye frame data and the second eye frame data corresponding to one stereoscopic image, the first field data corresponding to the odd-numbered row data of the first eye frame data; Second field data corresponding to odd row data of the second eye frame data, third field data corresponding to even row data of the first eye frame data, and second eye frame data
  • a data conversion unit that generates fourth field data corresponding to even-numbered rows of data, and the drive control unit includes each pixel in a time-division manner by repeating the first to fourth field data twice each
  • the first frame corresponds to a frame for writing the first or second field data
  • the second frame corresponds to the third or second frame.
  • Field data may be a configuration corresponding to the frame to write.
  • the first pixel and the second pixel may be a liquid crystal display element including a liquid crystal capacitor.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made to conduct at different timings, different data is written to the first pixel and the second pixel, and the second frame following the first frame includes the second switching element.
  • One switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and the second frame after the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing, and a drive control unit that writes the same data to the first pixel and the second pixel;
  • Data that does not perform enhancement correction on the gradation of the first pixel in the second frame is used as data to be written in one pixel, and data that is written in the first pixel in the third frame is used as data to be written in the second frame.
  • an enhancement correction unit that uses data that is enhanced and corrected according to the gradation of the first pixel and the gradation of the first pixel in the third frame.
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the second second after the first frame is written.
  • data to be written to the first pixel in the frame data that does not perform enhancement correction on the gradation of the first pixel in the second frame is prepared.
  • the first switching element and the second switching element are turned on at the same timing, the same data is written to the first pixel and the second pixel, and in the third frame next to the second frame.
  • the data to be written to the first pixel data that is enhanced and corrected according to the gradation of the first pixel in the second frame and the gradation of the first pixel in the third frame is prepared, and the third pixel is prepared.
  • the first switching element and the second switching element are made conductive at the same timing, and the same data is written into the first pixel and the second pixel.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • excessive correction due to enhancement correction can be prevented, and generation of noise can be suppressed.
  • a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel is interposed through the first switching element.
  • Connected to the first data signal line, and the second pixel is a display device connected to the first data signal line via the second switching element, and in the first frame, The first switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and in the second frame after the first frame, the first One switching element and the second switching element are made conductive at different timings, different data is written to the first pixel and the second pixel, and the next frame of the second frame is written.
  • the first switching element and the second switching element are made conductive at the same timing, and the drive control unit that writes the same data to the first pixel and the second pixel, and the above-mentioned in the first frame,
  • An emphasis correction unit that determines emphasis-corrected data to be written to the first pixel in the third frame according to the gradation of the first pixel and the gradation of the first pixel in the third frame;
  • a driving method of a display device includes first and second pixels, a first data signal line, and first and second switching elements, and the first pixel has the first switching.
  • the display device is connected to the first data signal line via an element, and the second pixel is connected to the first data signal line via the second switching element.
  • the first switching element and the second switching element are made conductive at the same timing, the same data is written to the first pixel and the second pixel, and the second frame after the first frame is written.
  • the first switching element and the second switching element are made conductive at different timings, and different data is written to the first pixel and the second pixel.
  • the moving image characteristics can be improved while securing the pixel charging time, and the cost of the display device can be reduced.
  • the cost of the display device can be reduced.
  • the display device for the first eye frame data and the second eye frame data corresponding to one stereoscopic image, the first field data corresponding to the odd-numbered row data of the first eye frame data; Second field data corresponding to odd row data of the second eye frame data, third field data corresponding to even row data of the first eye frame data, and second eye frame data
  • the first frame corresponds to the frame in which the first or second field data is written, and the second frame is the upper frame.
  • the third frame may be configured corresponding to the frame to write the first field data.
  • the present invention can be used for a liquid crystal display device.
  • SYMBOLS 1 Liquid crystal display device 10, 20, 30 Display control part 11, 21 Data generation part (data conversion part) 12 First line memory 13 Frame memory 14 Second line memories 15 and 24 Reference tone determination unit (enhancement correction unit) 16, 22, 25 Emphasis correction determination unit (enhancement correction unit) 17 LUT 18 Drive control unit 23 Second frame memory BL Backlight DATi Input data DATo Output data DCC Display control circuit GD Gate driver Gi Scan signal line LCP Liquid crystal panel (display unit) P pixel PE, PEa, PEb pixel electrode SD source driver Sj data signal line Tr, Tra, Trb, TR transistor (switching element)

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention concerne un dispositif d'affichage à cristaux liquides permettant d'améliorer la qualité d'images animées tout en garantissant le temps de charge des pixels et en réduisant les coûts. Une unité de détermination de correction des hautes lumières (16) détermine des données de correction des hautes lumières devant être écrites dans un premier pixel et un second pixel d'une seconde trame conformément à la gradation du premier pixel d'une première trame, à la gradation du second pixel de la première trame et à la gradation du premier pixel de la seconde trame.
PCT/JP2012/074975 2011-10-03 2012-09-27 Dispositif d'affichage et procédé destiné à piloter ce dernier Ceased WO2013051466A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011219290 2011-10-03
JP2011-219290 2011-10-03

Publications (1)

Publication Number Publication Date
WO2013051466A1 true WO2013051466A1 (fr) 2013-04-11

Family

ID=48043626

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/074975 Ceased WO2013051466A1 (fr) 2011-10-03 2012-09-27 Dispositif d'affichage et procédé destiné à piloter ce dernier

Country Status (1)

Country Link
WO (1) WO2013051466A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07175452A (ja) * 1993-12-17 1995-07-14 Casio Comput Co Ltd 液晶表示装置
JP2003208140A (ja) * 2001-11-09 2003-07-25 Sharp Corp 液晶表示装置
JP2004212610A (ja) * 2002-12-27 2004-07-29 Sharp Corp 表示装置の駆動方法、表示装置の駆動装置、および、そのプログラム
JP2011076034A (ja) * 2009-10-02 2011-04-14 Sony Corp 画像表示装置およびその駆動方法
JP2012137630A (ja) * 2010-12-27 2012-07-19 Panasonic Liquid Crystal Display Co Ltd 表示装置及び映像視聴システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07175452A (ja) * 1993-12-17 1995-07-14 Casio Comput Co Ltd 液晶表示装置
JP2003208140A (ja) * 2001-11-09 2003-07-25 Sharp Corp 液晶表示装置
JP2004212610A (ja) * 2002-12-27 2004-07-29 Sharp Corp 表示装置の駆動方法、表示装置の駆動装置、および、そのプログラム
JP2011076034A (ja) * 2009-10-02 2011-04-14 Sony Corp 画像表示装置およびその駆動方法
JP2012137630A (ja) * 2010-12-27 2012-07-19 Panasonic Liquid Crystal Display Co Ltd 表示装置及び映像視聴システム

Similar Documents

Publication Publication Date Title
CN101894514B (zh) 显示控制装置和显示控制方法
JP4768344B2 (ja) 表示装置
KR101477967B1 (ko) 표시 패널의 구동 방법 및 이를 수행하기 위한 표시 장치
JP4628650B2 (ja) 表示装置およびその駆動方法
KR102246262B1 (ko) 표시 패널의 구동 방법 및 이를 수행하기 위한 표시 장치
US9704428B2 (en) Display device and display method
JP2011076034A (ja) 画像表示装置およびその駆動方法
KR20080054190A (ko) 표시장치 및 이의 구동방법
CN105654917B (zh) 极性反转驱动方法、数据驱动器及液晶面板
US20080030514A1 (en) Display device
JP2014232321A (ja) 液晶表示装置及びその表示方法
CN106461990B (zh) 液晶显示装置以及显示方法
US20180114494A1 (en) Method of displaying three-dimensional image and display apparatus using the same
US8179356B2 (en) Method for driving liquid crystal display with inserting gray image
JP2008256954A (ja) 表示装置
TWI469130B (zh) 立體顯示系統
US20090244330A1 (en) Image processing apparatus and image processing method
JP2011141557A (ja) 表示装置
JP4764065B2 (ja) 画像表示制御装置、ディスプレイ装置及び画像表示方法
JP2011197389A (ja) 映像表示装置
JP2008076433A (ja) 表示装置
KR100865202B1 (ko) 표시 장치의 구동 방법
WO2013051466A1 (fr) Dispositif d'affichage et procédé destiné à piloter ce dernier
JP2007171367A (ja) 液晶表示装置
JP2007094008A (ja) 表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12839105

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12839105

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP