EP1847978A2 - Anzeigenstatussteuerung, Anzeigevorrichtung, Anzeigestatussteuerverfahren, Programm dafür und mit dem Programm aufgezeichnetes Aufzeichnungsmedium - Google Patents

Anzeigenstatussteuerung, Anzeigevorrichtung, Anzeigestatussteuerverfahren, Programm dafür und mit dem Programm aufgezeichnetes Aufzeichnungsmedium Download PDF

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Publication number
EP1847978A2
EP1847978A2 EP07106091A EP07106091A EP1847978A2 EP 1847978 A2 EP1847978 A2 EP 1847978A2 EP 07106091 A EP07106091 A EP 07106091A EP 07106091 A EP07106091 A EP 07106091A EP 1847978 A2 EP1847978 A2 EP 1847978A2
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EP
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Prior art keywords
state
pixel
pixels
image
display
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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.)
Withdrawn
Application number
EP07106091A
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English (en)
French (fr)
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EP1847978A3 (de
Inventor
Kazuhide Pioneer Corporation Sakuragi
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Pioneer Corp
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Pioneer Corp
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Publication of EP1847978A3 publication Critical patent/EP1847978A3/de
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • 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
    • G09G3/007—Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/363—Graphics controllers
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection
    • 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
    • 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
    • G09G2340/0414—Vertical resolution 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
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0421—Horizontal resolution 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
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0464—Positioning
    • 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
    • G09G2340/0464—Positioning
    • G09G2340/0471—Vertical positioning
    • 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
    • G09G2340/0464—Positioning
    • G09G2340/0478—Horizontal positioning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels

Definitions

  • the present invention relates to a display state controller for controlling a display state of an image corresponding to an input image signal, a display device, a display state control method, a program therefor, and a recording medium recorded with the program.
  • the display device has been used increasingly in many cases so as to display a still image for a certain period of time as a display for point-of-sale advertisement or as a screen for displaying information at a station or a service area.
  • a burn-in phenomenon occurs when an image is displayed for a certain period of time in the manner as described above.
  • the bum-in of the screen occurs due to a difference in degrees of deterioration of luminescent materials in a display region having a luminance difference in an image.
  • a method of using a screen saver is known.
  • the method is not suitable for the display for displaying information because contents of the display need to be changed.
  • Patent Document 1 JP 2000-227775 A discloses a method of periodically shifting a display position of an image in units of pixels.
  • Patent Document 1 has a problem in that the entire image, which is rapidly shifted by as much as one pixel, gives a visually unnatural impression though the shift is made for a long period of time, because the display position of the image is shifted for each predetermined period in units of 1 pixel.
  • Patent Document 2 JP 2003-274315 A
  • Patent Document 3 JP 2004-264366 A
  • Patent Document 4 JP 2005-070226 A
  • Patent Document 5 JP 2005-107132 A
  • a time is measured based on a synchronization signal of the image to be displayed, and a phase of the synchronization signal is adjusted to be advanced or delayed in units of a predetermined time period based on the measurement results.
  • interpolation processing is performed with respect to the input signal based on coefficient information based on a predetermined periodical pattern according to a pixel conversion ratio, and a start position of the coefficient information at that time is made variable, thereby realizing shift of pixels by a shifting amount of less than 1 pixel.
  • the burn-in of the screen can be prevented without changing the image by gradually shifting the display position of the image every predetermined period, and the display position of the image can be shifted without giving a visually unnatural impression by shifting the image in units of sub-pixels in appearance.
  • Patent Document 1 has a problem in that the entire image gives a visually unnatural impression since the entire image is rapidly shifted by as much as 1 pixel.
  • Patent Document 2 Patent Document 3, Patent Document 4, and Patent Document 5 which have been made in view of the problem inherent in the technique of Patent Document 1 have the following problems.
  • Patent Document 2 has a problem in that a smooth shift of a display screen through phase adjustment of a synchronization signal is limited to processing performed at the time of inputting an analog signal, and the shift is performed in units of 1 pixel in the processing performed at the time of inputting a digital signal.
  • a smooth shift of a display screen through phase adjustment of a synchronization signal is limited to processing performed at the time of inputting an analog signal, and the shift is performed in units of 1 pixel in the processing performed at the time of inputting a digital signal.
  • Patent Document 3 has a problem in that processing becomes complicated since pixel conversion processing and processing for shifting an image display position are executed in parallel. For example, when a shifting range of the display position exceeds 1 pixel due to a phase change smaller than 360°, it is difficult to perform processing in a case where coefficient conversion at the moment when the display position exceeds 1 pixel is performed by reading data using a FIFO memory or the like.
  • the technique of Patent Document 3 has another problem in that the pixel conversion must be performed every time when a phase is to be changed since the phase is not changed when the pixel conversion is not performed.
  • Patent Document 4 has a problem in that a resolution of a shifting amount within 1 pixel varies depending on enlargement factors since coefficient information based on the predetermined periodical pattern according to the pixel conversion ratio is used. Further, adjacent interpolation points are not aligned in order in some cases depending on the pixel conversion coefficients, which requires to deal with the cases individually, thereby making the processing complicated.
  • Patent Document 5 has a problem in that the image blurs while it is possible to shift a display position of an image without giving a visually unnatural impression by shifting the image in units of sub-pixels in appearance.
  • FIG. 1 is a diagram showing a state where a display position of an image on one horizontal line is changed with time.
  • pixels 1 displayed in black and pixels 2 displayed in white are alternately aligned on one horizontal line.
  • the pixels 2 displayed in white and the pixels 1 displayed in black are alternately aligned as shown in a lowermost stage of FIG. 1.
  • a pixel on a leftmost side, a pixel in the middle, and a pixel on a rightmost side are respectively changed with time to the pixel 1 displayed in black, a pixel 3 displayed in gray close to black, a pixel 4 displayed in gray between black and white, a pixel 5 displayed in gray close to white, and the pixel 2 displayed in white in the stated order.
  • a pixel next to the leftmost pixel and a pixel next to the rightmost pixel are respectively changed with time to the pixel 2 displayed in white, the pixel 5 displayed in gray close to white, the pixel 4 displayed in gray between black and white, the pixel 3 displayed in gray close to black, and the pixel I displayed in black in the stated order.
  • the technique of Patent Document 1 has a problem in that switching of a screen at the time of shifting the image is visually conspicuous since the image is shifted in units of 1 pixel.
  • the technique of Patent Document 2 has a problem in that the processing is limited to processing using analog signals since measures for preventing the burn-in through phase adjustment of a synchronization signal.
  • the techniques of Patent Document 3 and Patent Document 4 have a problem in that the processing is complicated.
  • the technique of Patent Document 5 has a problem in that an image blurs.
  • a main object of the present invention is to provide a display state controller capable of preventing burn-in of a display unit appropriately and easily, a display device, a display state control method, a program therefor, and a recording medium recorded with the program.
  • a display state controller for controlling a display state of an image corresponding to an input image signal, the image being displayed on a display unit that has a plurality of pixels
  • the display state controller including a shift controller that shifts predetermined regions to the other ends by performing: processing of enlarging the predetermined regions with one ends thereof as references so that an enlarged amount in one step is smaller than 1 pixel, in such a manner that the other ends opposing to the one ends are made apart from the one ends; and processing of reducing the predetermined regions with the other ends as references so that a reduced amount in one step is smaller than 1 pixel, in such a manner that the one ends are made closer to the other ends.
  • a display device including: a display unit; a display controller that acquires an input image signal and causes the display unit to display an image corresponding to the input image signal; and the display state controller according to the above-mentioned aspect that controls a display state of an image displayed on the display unit.
  • a display state control program which causes a calculation unit to execute the display state control method according to the above-mentioned another aspect.
  • a display state control program which causes the calculation unit to function as the display state controller according to the above-mentioned another aspect.
  • a recording medium recorded with a display state control program according to the above-mentioned another aspect in a manner readable by a calculation unit.
  • FIG. 2 is a block diagram showing a schematic structure of a display device according to the embodiment of the present invention.
  • FIG. 3 is a schematic diagram for explaining a control for shifting an image.
  • a state (A) indicates a state of a predetermined region at the same magnification; a state (B), a state where a predetermined region is enlarged rightward by as much as 0.25 pixels from the state (A); a state (C), a state where the predetermined region is enlarged rightward by as much as 0.5 pixels from the state (A); a state (D), a state where the predetermined region is enlarged rightward by as much as 0.75 pixels from the state (A); a state (E), a state where the predetermined region is enlarged rightward by as much as 1 pixel from the state (A); a state (F), a state where the predetermined region is reduced rightward by as much as 0.25 pixels from the state (E); a state (G), a state where the predetermined region is reduced rightward by as much as
  • reference numeral 100 denotes a display device.
  • the display device 100 includes an image signal inputting unit 110, an A/D conversion unit 120, a plasma display panel 130 serving as a display unit, and a display state controller 140.
  • the image signal inputting unit 110 receives input of an image signal having a component signal and an RGB signal, executes processing such as input switching, color separation, and color demodulation, and outputs the signal to the A/D conversion unit 120.
  • the A/D conversion unit 120 converts various signals inputted from the image signal inputting unit 110 into digital signals, and then outputs the digital signals to the display state controller 140.
  • the plasma display panel 130 displays a predetermined image based on a control of the display state controller 140.
  • the plasma display panel 130 includes a plurality of pixels arranged in vertical and horizontal directions.
  • the display state controller 140 controls the plasma display panel 130 to display a predetermined image in response to the digital signals from the A/D conversion unit 120.
  • the display state controller 140 includes a display controller 141, a shift controller 142, and a timer 143.
  • the timer 143 counts time based on a reference pulse such as an internal clock, and appropriately outputs clock information regarding the counted time.
  • the display controller 141 acquires a digital signal from the A/D conversion unit 120, and then lights each pixel at a signal output level corresponding to the digital signal, thereby controlling the plasma display panel 130 to display the predetermined image.
  • the shift controller 142 controls a lighting state of each pixel, and enlarges or reduces all the regions of the image displayed on the display controller 141 at the same timing by a small length dimension in a horizontal direction, thereby shifting the regions by a small distance.
  • hatching shown in circles each representing the first to seventh pixels 251 to 257 indicates a predetermined region 200 of an image.
  • the state (A) of FIG. 3 shows that the magnitude of the predetermined region 200 corresponds to six pixels, that is, the first to sixth pixels 251 to 256 put together.
  • the states (B), (C), (D), and (E) of FIG. 3 show that the magnitude of the predetermined region 200 corresponds to 6.25 pixels, 6.5 pixels, 6.75 pixels, and 7 pixels, respectively.
  • the shift controller 142 performs the following processing as processing of enlarging the predetermined region 200.
  • the signal output level in the pixel which is K pixels next to the enlargement reference pixel is controlled to be in a state of L (K + 1, J) obtained by the following formula (2).
  • L ⁇ K + 1 , J ( K ⁇ J / H ) ⁇ L K ⁇ 0 + H - K ⁇ J / H ⁇ L ⁇ K + 1 , 0
  • the shift controller 142 performs control, through the control of the display controller 141, such that the image is displayed without being enlarged nor reduced, and as shown in the state (A) of FIG. 3, the magnitude of the predetermined region 200 displayed by the P-th line is the same size as the six pixels.
  • the signal output levels in the first pixel 251, the second pixel 252, the third pixel 253, the fourth pixel 254, the fifth pixel 255, the sixth pixel 256, and the seventh pixel 257 that are in the same size are represented by L(1, 0), L(2, 0), L(3, 0), L(4, 0), L(5, 0), L(6, 0), and 0, respectively.
  • the value H in the formulae (1) and (2) is 6.
  • the values J corresponding to the third pixel 253, the fourth pixel 254, the fifth pixel 255, the sixth pixel 256, and the seventh pixel 257 are 1, 2, 3, 4, and 5, respectively.
  • the values K corresponding to the second pixel 252, the third pixel 253, the fourth pixel 254, the fifth pixel 255, the sixth pixel 256, and the seventh pixel 257 are 1, 2, 3, 4, 5, and 6, respectively.
  • the shift controller 142 enlarges the predetermined region 200 by as much as 0.25 pixels rightward with the first pixel 251 as a reference from state of the region in the same size as shown in the state (A) of FIG. 3, that is, controls the lighting state of the first to seventh pixels 251 to 257 to be in a state where the magnitude of the predetermined region 200 corresponds to 6.25 pixels as shown in the state (B) of FIG. 3.
  • the value J in the formulae (1) and (2) is 0.25.
  • the shift controller 142 controls the signal output level L(1, 0.25) of the first pixel 251, which is the enlargement reference pixel, to be in a state of L(1, 0) based on the formula (1). Specifically, the shift controller 142 controls the signal output level of the first pixel 251 not to be changed.
  • the signal output level L(2, 0.25) of the second pixel 252 when the value K in the formula (2) is, for example, 1, that is, a pixel one pixel next to the first pixel 251 is controlled to be in a state of (0.25/6)L(1, 0) + (5.75/6)L(2, 0) based on the formula (2).
  • the signal output level L(7, 0.25) of the seventh pixel 257 when the value K in the formula (2) is 6 is controlled to be in a state of (1.5/6)L(6, 0) based on the formula (2).
  • the shift controller 142 enlarges the predetermined region 200 by as much as 0.25 pixels rightward with the first pixel 251 as a reference from the state as shown in the state (B) of FIG. 3, that is, enlarges the predetermined region 200 by as much as 0.5 pixels from the state of the region in the same size to thereby control the magnitude of the predetermined region 200 to correspond to 6.5 pixels as shown in the state (C) of FIG. 3.
  • the value J in the formulae (1) and (2) is 0.5.
  • the shift controller 142 controls the respective signal output levels L(1, 0.5), L(2, 0.5), L(3, 0.5), L(4, 0.5), L(5, 0.5), L(6, 0.5), and L(7, 0.5) of the first to seventh pixels 251 to 257 to be in the state as shown in FIG. 4.
  • the shift controller 142 enlarges the predetermined region 200 by as much as 0.25 pixels rightward with the first pixel 251 as a reference from the state as shown in the state (C) of FIG. 3, that is, enlarges the predetermined region 200 by as much as 0.75 pixels from the state of the region in the same size to thereby control the magnitude of the predetermined region 200 to correspond to 6.75 pixels as shown in the state (D) of FIG. 3.
  • the value J in the formulae (1) and (2) is 0.75.
  • the shift controller 142 controls the respective signal output levels L(1, 0.75), L(2, 0.75), L(3, 0.75), L(4, 0.75), L(5, 0.75), L(6, 0.75), and L(7, 0.75) of the first to seventh pixels 251 to 257 to be in the state as shown in FIG. 4.
  • the shift controller 142 enlarges the predetermined region 200 by as much as 0.25 pixels rightward with the first pixel 251 as a reference from the state as shown in the state (D) of FIG. 3, that is, enlarges the predetermined region 200 by as much as 1 pixel from the state of the region in the same size to thereby control the magnitude of the predetermined region 200 to correspond to 7 pixels as shown in the state (E) of FIG. 3.
  • the shift controller 142 controls the respective signal output levels L(1, 1), L(2, 1), L(3, 1), L(4, 1), L(5, 1), L(6, 1), and L(7, 1) of the first to seventh pixels 251 to 257 to be in the state as shown in FIG. 4.
  • the shift controller 142 controls the signal output levels of the first pixel 251 to the seventh pixel 257 to become values obtained based on a formula substantially corresponding to the formulae (1) and (2), thereby controlling the predetermined region 200 to be reduced by as much as 1 pixel with the seventh pixel 257 as a reference.
  • the shift controller 142 reduces the predetermined region 200 by as much as 0.25 pixels rightward with the seventh pixel 257 as a reference from the state as shown in the state (E) of FIG. 3, that is, controls the predetermined region 200 to be in a state where the magnitude of the predetermined region 200 corresponds to 6.75 pixels as shown in the state (F) of FIG. 3.
  • the shift controller 142 performs twice the control for reducing the predetermined region 200 by as much as 0.25 pixels rightward with the seventh pixel 257 as a reference from the state as shown in the state (F) of FIG. 3. In other words, as shown in the states (G) and (H) of FIG. 3, the shift controller 142 controls the predetermined region 200 to be in a state where the magnitude of the predetermined region 200 corresponds to 6.5 pixels and 6.25 pixels, respectively.
  • the shift controller 142 reduces the predetermined region 200 by as much as 0.25 pixels rightward with the seventh pixel 257 as a reference from the state as shown in the state (H) of FIG. 3, that is, controls the predetermined region 200 to be in a state where the magnitude of the predetermined region 200 corresponds to 6 pixels as shown in the state (I) of FIG. 3.
  • the predetermined region 200 is shifted by as much as 1 pixel rightward from the state of the region in the same size.
  • the shift controller 142 executes the above-mentioned controls at the same timing with respect to the entire region of the image displayed on the plasma display panel 130, thereby performing a control for shifting the entire image by as much as 1 pixel rightward. Then, the shift controller 142 executes the above-mentioned controls with respect to the entire region of the image in a reverse order, thereby performing a control for shifting the entire image by as much as 1 pixel leftward. In other words, the shift controller 142 performs a control such that the state as shown in the state (I) of FIG. 3 is returned to the state as shown in the state (A) of FIG. 3.
  • FIG. 5 is a flowchart showing display state control processing.
  • the display device 100 displays an image corresponding to an image signal inputted to the image signal inputting unit 110, on the plasma display panel 130 through the control of the display controller 141 of the display state controller 140.
  • the shift controller 142 of the display state controller 140 executes timer count processing based on the clock information obtained from the timer 143 (Step S101), and performs processing of setting variables V, W, X, and Y to 0 (Step S102).
  • the shift controller 142 performs processing of adding 1 to the variable V (Step S103). Then, the shift controller 142 performs a control for enlarging the predetermined region 200 by as much as 0.25 pixels rightward with the first pixel 251 as a reference (Step S104) and judges whether or not the variable V is 4 (Step S105).
  • Step S105 when it is judged that the variable V is not 4, the shift controller 142 executes the processing of Step S103.
  • Step S105 when it is judged that the variable V is 4, that is, when it is judged that the shift controller 142 has executed the processing of Step S104 four times and has performed the control for enlarging the predetermined region 200 rightward by as much as 1 pixel with the first pixel 251 as a reference, the shift controller 142 performs processing of adding 1 to the variable W (Step S106). After that, the shift controller 142 performs a control for reducing the predetermined region 200 by as much as 0.25 pixels rightward with the seventh pixel 257 as a reference (Step S107), and judges whether or not the variable W is 4 (Step S108).
  • Step S108 when it is judged that the variable W is not 4, the shift controller 142 executes the processing of Step S106.
  • Step S108 when it is judged that the variable W is 4, that is, when it is judged that the shift controller 142 has executed the processing of Step S107 four times and has performed the control for reducing the predetermined region 200 by as much as 1 pixel rightward with the first pixel 251 as a reference, the shift controller 142 performs the timer count processing (Step S109), and performs processing of adding 1 to the variable X (Step S110). After that, the shift controller 142 performs a control for enlarging the predetermined region 200 by as much as 0.25 pixels leftward with the seventh pixels 257 as a reference (Step S111), and judges whether or not the variable X is 4 (Step S 112).
  • Step S112 when it is judged that the variable X is not 4, the shift controller 142 executes the processing of Step S110.
  • Step S112 when it is judged that the variable X is 4, that is, when it is judged that the shift controller 142 has executed the processing of Step S111 four times and has performed the control for enlarging the predetermined region 200 leftward by as much as 1 pixel with the seventh pixels 257 as a reference, the shift controller 142 performs processing of adding 1 to the variable Y (Step S113). After that, the shift controller 142 performs a control for reducing the predetermined region 200 by as much as 0.25 pixels rightward with the first pixels 251 as a reference (Step S114), and judges whether or not the variable Y is 4 (Step S115).
  • Step S115 when it is judged that the variable Y is not 4, the shift controller 142 executes the processing of Step S113.
  • Step S113 when it is judged that the variable Y is 4, that is, when it is judged that the shift controller 142 has executed the processing of Step S 114 four times and has performed the control for reducing the predetermined region 200 by as much as 1 pixel leftward with the first pixel 251 as a reference, in other words, when it is judged that the predetermined region 200 has returned to the state before the shift control is started, the shift controller 142 finishes the processing.
  • the display state controller 140 of the display device 100 executes the processing of enlarging the predetermined region 200 of the image rightward by as much as 0.25 pixels with the first pixel 251 as a reference, and the processing of reducing the predetermined region 200 rightward by as much as 0.25 pixels with the seventh pixel 257 as a reference, thereby performing a control for shifting the predetermined region 200 rightward.
  • the display state controller 140 executes the processing of enlarging the predetermined region 200 so that the enlarged amount in one step is smaller than 1 pixel in a state where one end is made apart from the other end when the one end is set as a reference, and the processing of reducing the predetermined region 200 so that the reduced amount in one step is smaller than 1 pixel in a state where one end thereof is made closer to the other end thereof when the one end is set as a reference, thereby performing a control for shifting the predetermined region 200 to the other end side.
  • the image is shifted by enlarging or reducing the magnitude of the predetermined region 200 so that the enlarged amount or the reduced amount thereof in each one step is smaller than 1 pixel, thereby making it possible to shift the image while changing the magnitude of the image without giving a visually unnatural impression.
  • the image is shifted by controlling the lighting state of each pixel, which can also be applied to the processing using digital signals.
  • the image is shifted while changing the magnitude thereof, thereby making it possible to suppress blurring of the entire image as compared with the structure for shifting an image without changing the magnitude of the image.
  • the display state controller 140 executes the processing of enlarging the predetermined region 200 leftward by as much as 0.25 pixels with the seventh pixel 257 as a reference, and the processing of reducing the predetermined region 200 leftward by as much as 0.25 pixels with the first pixel 251 as a reference, thereby performing a control for shifting the predetermined region 200 leftward.
  • the burn-in can be more prevented as compared with the structure in which the image can be shifted only in one direction.
  • the display state controller 140 shifts the predetermined region 200 in a state where the magnitude of the region to be enlarged and the magnitude of the region to be reduced are the same.
  • the display state controller 140 executes the processing of enlarging the predetermined region 200 and the processing of reducing the predetermined region 200 at the same timing with respect to the entire region of the image.
  • the display state controller 140 executes processing of controlling the signal output levels of the first to seventh pixels 251 to 257 to become values obtained based on the formulae (1) and (2) as the processing of enlarging the predetermined region 200.
  • the predetermined region 200 can be enlarged through simple processing of only substituting values corresponding to the first to seventh pixels 251 to 257 to the formulae (1) and (2), thereby making it possible to swiftly perform processing of shifting the image.
  • the display state controller 140 is provided to the display device 100.
  • the display device 100 capable of preventing the bum-in of the plasma display panel 130 appropriately and easily.
  • the present invention is not limited to the above-mentioned embodiment, but includes modifications described below within the gist of the present invention.
  • control for shifting the predetermined region 200 can be easily performed.
  • a structure for shifting the predetermined region 200 in a state where the magnitude of the region to be enlarged and the magnitude of the region to be reduced are different from each other. For example, after the processing of enlarging the predetermined region 200 rightward by as much as 0.25 pixels is successively performed twice, the processing of reducing the predetermined region 200 rightward by as much as 0.5 pixels may be performed once, to thereby shift the predetermined region 200 rightward by as much as 0.5 pixels.
  • the magnitude of the region to be enlarged or reduced is not limited to 0.25 pixels, any magnitude such as 0.1 pixels or 0.8 pixels may be adopted as long as the enlarged amount or the reduced amount in one step is less than 1 pixel.
  • hatching shown in the circles representing a first pixel 351, a second pixel 352, a third pixel 353, a fourth pixel 354, a fifth pixel 355, a sixth pixel 356, and a seventh pixel 357, respectively, indicates a predetermined region 300 of an image.
  • the predetermined region 300 having the magnitude in the horizontal direction corresponding to 6 pixels is displayed by using the first to seventh pixels 351 to 357 constituting the P-th line, the (P + 1)th line, the (P + 2)th line.
  • processing of enlarging a first region 301 corresponding to the P-th line rightward by as much as 0.5 pixels with the first pixel 351 as a reference from the state of the region in the same size shown in the state (A) of FIG. 6, and enlarging a second region 302 corresponding to the (P + 1)th line rightward by as much as 0.25 pixels is performed twice, thereby making each magnitude of the first region 301 in the states (B) and (C) of FIG. 6 correspond to 6.5 pixels and 7 pixels, and making each magnitude of the second region 302 in the states (B) and (C) correspond to 6.25 pixels and 6.5 pixels, respectively.
  • processing of enlarging the second region 302 rightward by as much as 0.25 pixels and enlarging a third region 303 corresponding to the (P + 2)th line rightward by as much as 0.5 pixels with the first pixel 351 as a reference is performed twice, thereby making each magnitude of the second region 302 in the states (D) and (E) of FIG. 6 correspond to 6.75 pixels and 7 pixels, and making each magnitude of the third region 303 in the states (D) and (E) correspond to 6.5 pixels and 7 pixels, respectively.
  • each magnitude of the first to third regions 301 to 303 corresponds to 7 pixels. That is, the predetermined region 300 is enlarged rightward by as much as 1 pixel.
  • processing of reducing the first region 301 rightward by as much as 0.5 pixels with the seventh pixel 357 as a reference and reducing the second region 302 rightward by as much as 0.25 pixels is performed twice.
  • processing of reducing the second region 302 rightward by as much as 0.25 pixels and reducing the third region 303 rightward as much as 0.5 pixels with the seventh pixel 357 as a reference is performed twice.
  • each magnitude of the first region 301 in the states (F) to (I) of FIG. 7 is made to correspond to 6.5 pixels, 6 pixels, 6 pixels, and 6 pixels
  • each magnitude of the second region 302 in the states (F) to (I) is made to correspond to 6.75 pixels, 6.5 pixels, 6.25 pixels, and 6 pixels
  • each magnitude of the third region 303 in the states (F) to (I) is made to correspond to 7 pixels, 7 pixels, 6.5 pixels, and 6 pixels, respectively.
  • the predetermined region 300 is shifted rightward by as much as 1 pixel.
  • the first region 301 is enlarged rightward by as much as 0.5 pixels with the first pixel 351 as a reference, and as shown in the state (B) of FIG. 8, the magnitude of the first region 301 is made to correspond to 6.5 pixels.
  • the first region 301 is enlarged rightward by as much as 0.5 pixels and the second region 302 is enlarged rightward by as much as 0.5 pixels with the first pixel 351 as a reference, and then the magnitudes of the first region 301 and the second region 302 are made to respectively correspond to 7 pixels and 6.5 pixels as shown in the state (C) of FIG. 8.
  • the first region 301 is reduced rightward by as much as 0.5 pixels with the seventh pixel 357 as a reference and the second region 302 and the third region 303 are respectively enlarged rightward by as much as 0.5 pixels, and then the magnitudes of the first to third regions 301 to 303 are made to respectively correspond to 6.5 pixels, 7 pixels, and 6.5 pixels as shown in the state (D) of FIG. 8.
  • the first region 301 and the second region 302 are respectively reduced rightward by as much as 0.5 pixels with the seventh pixel 357 as a reference and the third region 303 is enlarged rightward by as much as 0.5 pixels, and then the magnitudes of the first to third regions 301 to 303 are made to respectively correspond to 6 pixels, 6.5 pixels, and 7 pixels as shown in the state (E) of FIG. 8.
  • the second region 302 and the third region 303 are respectively reduced rightward by as much as 0.5 pixels with the seventh pixel 357 as a reference, and then only the third region 303 is reduced rightward by as much as 0.5 pixels.
  • each magnitude of the second region 302 in the states (F) and (G) of FIG. 8 is made correspond to 6 pixels and 6 pixels
  • each magnitude of the third region 303 in the states (F) and (G) is made correspond to 6.5 pixels and 6 pixels.
  • the predetermined region 300 is shifted rightward by as much as 1 pixel.
  • an aggregate region 400 constituting a first predetermined region 410, a second predetermined region 430, a third predetermined region 430, and a fourth predetermined region 440 that are adjacent to each other in the horizontal direction is displayed.
  • the first predetermined region 410 and the third predetermined region 430 are enlarged rightward with left ends of the first and third predetermined regions 410 and 430 as a reference, and the second predetermined region 420 and the fourth predetermined region 440 are reduced rightward with right ends of the second and fourth predetermined regions 420 and 440 as a reference (hereinafter, referred to as "first enlarging/reducing processing").
  • first enlarging/reducing processing each magnitude of the enlarged or reduced first to fourth predetermined regions 410 to 440 is the same, and the magnitude thereof corresponds to Q (0 ⁇ Q ⁇ 1) pixels which is smaller than the magnitude of the pixels.
  • non-shifting enlarged/reduced state the aggregate region 400 is not shifted (hereinafter, referred to as "non-shifting enlarged/reduced state").
  • the first and third predetermined regions 410 and 430 are reduced rightward with the right ends thereof as a reference, and the second and fourth predetermined regions 420 and 440 are enlarged rightward with the left ends thereof as a reference (hereinafter, referred to as "second enlarging/reducing processing").
  • second enlarging/reducing processing As a result, the aggregate region 400 is shifted rightward by as much as Q pixels (hereinafter, referred to as "rightward shifted state").
  • first enlarging/reducing processing and the second enlarging/reducing processing are alternately performed three times each.
  • the non-shifting enlarged/reduced state and the rightward shifted state are alternately obtained, and the aggregate region 400 is shifted rightward by as much as (4 x Q) pixels from the state as shown in the state (A) of FIG. 10.
  • the first to fourth predetermined regions 410 to 440 are enlarged or reduced at different timing, which complicates the control thereof as compared with the structure according to the embodiment, while it is possible to prevent the burn-in of the display more appropriately and easily as compared with the conventional structure.
  • a control for the signal output levels based on the formulae (1) and (2) may be executed.
  • the shift controller 142 may be provided separately from the display device 100 so that the shift controller 142 can be appropriately connected to the display device 100.
  • the display state controller according to the present invention may be applied to a display device including a liquid crystal panel serving as a display unit, an organic electro luminescence (EL) panel, a CRT, and a field emission display (FED).
  • a display device including a liquid crystal panel serving as a display unit, an organic electro luminescence (EL) panel, a CRT, and a field emission display (FED).
  • EL organic electro luminescence
  • CRT CRT
  • FED field emission display
  • the above-mentioned functions are implemented as a program, but may be implemented by, for example, hardware such as a circuit board or a device such as an integrated circuit (IC), and thus the functions can be implemented in any forms.
  • IC integrated circuit
  • the display state controller 140 of the display device 100 executes the processing of enlarging the predetermined region 200 of the image rightward by as much as 0.25 pixels with the first pixel 251 as a reference, and the processing of reducing the predetermined region 200 rightward by as much as 0.25 pixels with the seventh pixel 257 as a reference, thereby performing the control for shifting the predetermined region 200 rightward.
  • the image is shifted by enlarging or reducing the magnitude of the predetermined region 300 so that the enlarged amount or the reduced amount in one step is smaller than 1 pixel, thereby making it possible to shift the image while changing the magnitude of the image without giving a visually unnatural impression.
  • the image is shifted by controlling the lighting state of each pixel, which can also be applied to the processing using digital signals.
  • the image is shifted while changing the magnitude thereof, which can suppress blurring of the entire image as compared with the structure for shifting an image without changing the magnitude of the image.
  • the display state controller 140 is provided to the display device 100.
  • the display device 100 capable of preventing the burn-in of the plasma display panel 130 appropriately and easily.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP07106091A 2006-04-19 2007-04-12 Anzeigenstatussteuerung, Anzeigevorrichtung, Anzeigestatussteuerverfahren, Programm dafür und mit dem Programm aufgezeichnetes Aufzeichnungsmedium Withdrawn EP1847978A3 (de)

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TWI700932B (zh) * 2015-05-06 2020-08-01 南韓商三星顯示器有限公司 影像校正器、包含影像校正器之顯示裝置及用於使用顯示裝置顯示影像之方法
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