EP1403843A1 - Méthode d'affichage d'images sur un dispositif d'affichage, et dispositif d'affichage utilisé à cet effet - Google Patents

Méthode d'affichage d'images sur un dispositif d'affichage, et dispositif d'affichage utilisé à cet effet Download PDF

Info

Publication number
EP1403843A1
EP1403843A1 EP20030021482 EP03021482A EP1403843A1 EP 1403843 A1 EP1403843 A1 EP 1403843A1 EP 20030021482 EP20030021482 EP 20030021482 EP 03021482 A EP03021482 A EP 03021482A EP 1403843 A1 EP1403843 A1 EP 1403843A1
Authority
EP
European Patent Office
Prior art keywords
sub
field
fields
divided
divided sub
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
EP20030021482
Other languages
German (de)
English (en)
Inventor
Kazuo c/o Nec Plasma Display Corporation Denda
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.)
Panasonic Corp
Original Assignee
NEC Plasma Display 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 NEC Plasma Display Corp filed Critical NEC Plasma Display Corp
Publication of EP1403843A1 publication Critical patent/EP1403843A1/fr
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
    • G09G3/20—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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2033—Display of intermediate tones by time modulation using two or more time intervals using sub-frames with splitting one or more sub-frames corresponding to the most significant bits into two or more sub-frames
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2029—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having non-binary weights
    • 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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G3/288—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 using AC panels

Definitions

  • the invention relates to an apparatus for displaying images at a certain gray scale through the use of sub-fields, such as a plasma display unit, and a method of displaying images in such an apparatus, and more particularly to such an apparatus which is capable of reducing big-area flickers generated when a television signal having a relatively low vertical-synchronization frequency or a similar signal is displayed, and a method of displaying images in such an apparatus.
  • intermediate gray scales are displayed generally in accordance with a sub-field process.
  • a sub-field process is a process applicable to an image-displaying apparatus having a high response speed, such as a plasma display unit.
  • an image signal is quantized, and resultant one-field data is displayed in time-division for each of gray scale bits.
  • a field is divided into a group of small fields each called a sub-field.
  • a weight determined in accordance with the number of light-emissions which number is associated with each of gray scale bits is assigned to each of sub-fields. Images are successively reproduced with the sub-fields, and images over one field are accumulated by virtue of integration effect of visual sense. Thus, there are obtained natural images with intermediate gray scales.
  • input analog image signals are quantized or A/D converted into 8-bit luminance signals associated with gray scale luminance data indicating luminances one of which is twice greater than another.
  • data of the quantized image signals is stored in a frame buffer memory.
  • B1 a bit having a highest luminance
  • B2 a bit having a second-highest luminance
  • a ratio of luminances of the bits is 128: 64: 32: 16: 8: 4: 2: 1.
  • a method of displaying images in accordance with a sub-field process hereinbelow is explained a method of displaying images, in which a display unit is driven separately in a scanning period and a sustaining period, with reference to FIG. 1.
  • the method is applied to an AC color plasma display unit.
  • one field is divided into first to eighth sub-fields SF1 to SF8.
  • Each of the sub-fields SF1 to SF8 is comprised of a scanning period A and a sustaining discharge period B.
  • Weights 128, 64, 32, 16, 8, 4, 2 and 1 are assigned to the sub-fields SF1 to SF8, respectively.
  • a scanning period in the first sub-field SF1 data is written into each of pixels, based on display data of the bit B1 having the highest luminance. After data has been written into all of pixels, a sustaining discharge pulse is applied entirely to a display panel to thereby carry out light-emission only in pixels into which data has been written.
  • pulses are applied to a display panel 256 times in the first sub-field SF1, for instance, in order to ensure sufficient luminance.
  • pulses are applied to a display panel 128, 64, 32, 16, 8, 4 and 2 times in the second to eighth sub-fields SF1 to SF8, respectively.
  • An order of sub-fields in the case that a field is designed such that a relative ratio of a luminance is reduced with the lapse of time, as illustrated in FIG. 1, is called a descending sub-field order
  • an order of sub-fields in the case that a field is designed such that a relative ratio of a luminance is increased with the lapse of time is called an ascending sub-field, order.
  • sub-fields may be arranged in various ways for displaying gray scales. However, even if sub-fields are arranged simply differently from the above-mentioned two orders, the following problems would be caused.
  • a renewal speed of a display screen is generally set identical with a vertical-synchronization signal in a CRT-type display and a plasma display panel.
  • optical stimulation a viewer receives at his/her eyes from a display screen is recognized as blinking of luminances which are in proportion to vertical-synchronization signals. If a repetition interval of the luminance blinking is long, a viewer could clearly recognize the blinking as flicker, whereas if a repetition interval of the luminance blinking is short, a viewer would recognize the blinking as continuous light-emission.
  • a boundary interval between the former and latter intervals is called a critical fusion interval.
  • a vertical synchronization frequency adapted in European TV standards is generally 50 Hz, and a repetition period of a vertical synchronization signal and a repetition period of an image signal are designed equal to 20 ms, which is almost equal to the above-mentioned critical fusion period.
  • Whether a viewer recognizes blinking of luminances as flickers or as continuous light-emission is dependent on a luminance level of a displayed image signal. Even if the same image is displayed, a viewer is more likely to recognize blinking of luminances as flickers, if a displayed image signal had a higher luminance level.
  • flickers flickers observed in an entire display screen, caused by a low vertical-synchronization frequency, are in particular called big area flickers. Big-area flickers reduce display quality in particular when signals having a high luminance level are displayed.
  • technique called “100 Hz TV” is recently frequently used in a CRT-type television set.
  • “100 Hz TV” a vertical frequency is doubled on a side of a receiver, and further, image data for one image plane is stored in a memory, and the data stored in a memory is read out twice at a doubled speed.
  • the technique "100 Hz TV” reduces big-area flickers to a level a viewer can scarcely detect flickers.
  • a method called "pseudo-100 Hz" is used in a plasma display panel.
  • some of upper grade sub-fields are divided into a plurality of sub-fields, and the thus divided sub-fields are arranged in such a manner that a frequency of 50 Hz of an image signal is increased up to 100 Hz, thereby reducing big-area flickers.
  • Japanese Patent Application Publication No. 2001-42818 has suggested an example of an arrangement of divided sub-fields.
  • the Publication merely discloses an arrangement of divided sub-fields, but does not mention an order in which divided sub-fields are displayed or turned on.
  • Japanese Patent Application Publication No. 11-15435 has suggested an order in which sub-fields each having a weight are displayed.
  • a field is divided into five sub-fields SF1 to SF5.
  • Weights 1, 2, 3, 4 and 6 are assigned to the sub-fields SF1 to SF5, respectively. That is, the sub-fields SF1 to SF5 are arranged in an order of a magnitude of weights.
  • FIG. 3 is a table showing which sub-field or sub-fields is(are) turned on among the five sub-fields SF1 to SF5.
  • the first sub-field SF1 having a weight of 1 and the second sub-field SF2 having a weight of 2 are turned on for a gray scale of 3.
  • the second sub-field SF2 having a weight of 2 having a weight of 2
  • the third sub-field SF3 having a weight of 3 having a weight of 3
  • the fourth sub-field SF4 having a weight of 4 are turned on.
  • a method of displaying sub-fields includes the steps of assigning smaller numbers to sub-fields having a smaller weight, as illustrated in FIG. 2, and selecting a combination of sub-fields to be displayed at each of gray scales such that a sub-field or sub-fields having a smaller number or weight is(are) preferentially turned on, as illustrated in FIG. 3.
  • the method has a principal object of suppressing moving picture pseudo-frame, and suppressing flickers is a second object.
  • the sub-fields in the method disclosed in Japanese Patent Application Publication No. 11-15435 are not divided sub-fields. Hence, it is assumed that the method of displaying divided sub-fields is applied to the method of displaying sub-fields, suggested in the above-mentioned Japanese Patent Application Publication No. 2001-42818.
  • the fourth and fifth sub-fields SF4 and SF5 are divided sub-fields having weights 4 and 6, respectively.
  • the divided sub-field or sub-fields is(are) not turned on at certain gray scales, though the divided sub-field or sub-fields can be turned on.
  • the fourth sub-field SF4 can be turned on at a gray scale of 4.
  • the first and third sub-fields SF1 and SF3 having weights 1 and 3, respectively, are actually turned on.
  • an object of the present invention to provide a method of displaying images which is capable of efficiently reducing big-area flickers when an image signal having a problem of big-area flickers is caused to have a pseudo-100 Hz by dividing a sub-field having a great weight into a plurality of sub-fields.
  • a method of displaying images including the steps of dividing at least one sub-field among a plurality of sub-fields constituting a field of an image signal, into a plurality of sub-fields each having a predetermined luminance weight, and pseudo-doubling a field frequency of the image signal, characterized by preferentially selecting a divided sub-field to a non-divided sub-field for a gray scale at which images can be displayed with the divided sub-field.
  • the divided sub-field is selected preferentially to a non-divided sub-field for the gray scale when the field frequency is smaller than 60 Hz.
  • An order of displaying the sub-fields when the field frequency is equal to or greater than 60 Hz may be different from an order of displaying the sub-fields when the field frequency is smaller than 60 Hz.
  • the non-divided sub-field is selected preferentially to the divided sub-field when the field frequency is equal to or greater than 60 Hz, and the divided sub-field is selected preferentially to the non-divided sub-field for the gray scale when the field frequency is smaller than 60 Hz.
  • the divided sub-fields are arranged in an order of a magnitude of the luminance weight.
  • the non-divided sub-fields are arranged in an order of a magnitude of the luminance weight.
  • the method may be applied to a method of displaying images in a plasma display unit.
  • an apparatus for displaying images which divides at least one sub-field among a plurality of sub-fields constituting a field of an image signal, into a plurality of sub-fields each having a predetermined luminance weight, and pseudo-doubles a field frequency of the image signal, characterized in that a divided sub-field is preferentially selected to a non-divided sub-field for a gray scale at which images can be displayed with the divided sub-field.
  • the divided sub-field is selected preferentially to a non-divided sub-field for the gray scale when the field frequency is smaller than 60 Hz.
  • An order of displaying the sub-fields when the field frequency is equal to or greater than 60 Hz may be different from an order of displaying the sub-fields when the field frequency is smaller than 60 Hz.
  • the non-divided sub-field is selected preferentially to the divided sub-field when the field frequency is equal to or greater than 60 Hz, and the divided sub-field is selected preferentially to the non-divided sub-field for the gray scale when the field frequency is smaller than 60 Hz.
  • the divided sub-fields are arranged in an order of a magnitude of the luminance weight.
  • the non-divided sub-fields are arranged in an order of a magnitude of the luminance weight.
  • the apparatus is comprised of a plasma display unit.
  • FIG. 4 is a block diagram of an apparatus 10 for displaying images, in accordance with a preferred embodiment of the present invention.
  • the apparatus 10 is comprised of an analog-digital (A/D) converter 21, a reverse-gamma ( y ) compensator 22, a first data-arranger 23, a central processing unit (CPU) 24, a frame buffer memory 25, a second data-arranger 26, a first data-driver 27, a second data-driver 28, a synchronization separator 29, a system clock generator 30, a sub-field generator 31, a timing generator 32, a scanning driver 33, and a plasma display panel (PDP) 34.
  • A/D analog-digital
  • y reverse-gamma
  • CPU central processing unit
  • the A/D converter 21 receives RGB image signals, and quantizes them.
  • the images signals quantized by the A/D converter 21 are compensated for by the reverse-gamma compensator 22 with respect to brightness data.
  • Data signals output from the reverse-gamma compensator 22 are arranged in the first data-arranger 23 such that the data signals are suitable for being stored in the frame buffer memory 25.
  • the RGB image signals are mixed with one another to obtain addresses different for each of gray scale bits.
  • the central processing unit 24 carries out read/write control between the frame buffer memory 25 and a previous or next stage.
  • Data indicative of each of gray scale bits of images read out for each of sub-fields is transmitted to the second data-arranger 26 through the central processing unit 24. Then, the data is rearranged into a final arrangement, and then, transmitted to the first and second data-drivers 27 and 28.
  • the synchronization separator 29 separates synchronization signals out of the RGB image signals.
  • the system clock generator 30 outputs a system clock.
  • Vertical-synchronization signals among the synchronization signals separated out of the RGB image signals in the synchronization separator 29 are transmitted to the sub-field generator 31, and are used as reference signals for a sub-field sequence.
  • the sub-field generator 31 determines an order of arranging sub-fields, based on both the system clock transmitted from the system clock generator 30 and the vertical-synchronization signals.
  • the timing generator 32 receives output signals transmitted from the sub-field generator 31, and transmits a timing signal to the central processing unit 24 and the scanning driver 33.
  • the scanning driver 33 drives scanning electrodes formed on the plasma display panel 34, in accordance with the timing signals received from the timing generator 32.
  • Scanning pulses are applied to scanning electrodes one by one, and a data pulse is applied to a selected data electrode in synchronization with application of the scanning pulse. After the linear scanning has been effected all over a panel, sustaining discharge is effected entirely over the panel, resulting in emission of color light.
  • FIG. 5 shows an arrangement of sub-fields generated in the apparatus 10.
  • the sub-field generator 31 generates first to fifth sub-fields SF1 to SF5 all of which constitutes one field. Weights 4, 6, 1, 2 and 3 (figures in parentheses) are assigned to the sub-fields SF1 to SF5, respectively.
  • each of the first and second sub-fields SF1 and SF2 is divided into two sub-fields.
  • the sub-fields SF1 and SF2 to be divided into a plurality of sub-fields are arranged in advance of sub-fields SF3 to SF5 not to be divided into a plurality of sub-fields. Furthermore, a sub-field having a smaller weight is arranged in advance of a sub-field having a higher weight among both sub-fields to be divided into a plurality of sub-fields and both sub-fields not to be divided.
  • the first SF1 having a weight of 4 is first arranged, and the second sub-field SF2 having a weight of 6 is second arranged among sub-fields to be divided into a plurality of sub-fields.
  • the third sub-field SF3 having a weight of 1 is first arranged, the fourth sub-field SF 4 having a weight of 2 is second arranged, and the fifth sub-field SF5 having a weight of 3 is third arranged.
  • FIG. 6 illustrates an example of the sub-field arrangement including the first and second sub-fields SF1 and SF2 divided into two sub-fields.
  • the first sub-field SF1 is divided into two sub-fields SF1-1 and SF1-2
  • the second sub-field SF2 is divided into two sub-fields SF2-1 and SF2-2.
  • a weight of 2 which means a half of the weight 4 of the first sub-field SF1
  • a weight of 3 which means a half of the weight 6 of the second sub-field SF2
  • the third sub-field SF3, the fourth sub-field SF4, the divided sub-field SF1-1 and the divided sub-field SF2-1 are arranged in this order in the first 10 msec
  • the fifth sub-field SF5, the divided sub-field SF1-2 and the divided sub-field SF2-2 are arranged in this order in the second 10 msec.
  • the divided sub-fields are arranged behind the non-divided sub-fields.
  • FIG. 7 is a table showing which sub-field or sub-fields is(are) to be turned on among the first to fifth sub-fields SF1 to SF5 in association with each of gray scales in the apparatus 10 in accordance with the embodiment.
  • the divided sub-field SF1-1, SF1-2, SF2-1 or SF2-2 is displayed preferentially to the non-divided sub-field SF3, SF4 and SF5 for a gray scale in which the divided sub-field SF1-1, SF1-2, SF2-1 or SF2-2 can be displayed.
  • the gray scale number is equal to 4, though the third sub-field SF3 having a weight of 1 and the fifth sub-field SF5 having a weight of 3 may be displayed, the first sub-field SF1 having a weight of 4, that is, the divided sub-field SF1-1 having a weight of 2 and the divided sub-field SF1-2 having a weight of 2 are displayed in the embodiment in place of the third and fifth sub-fields SF3 and SF5.
  • the gray scale number is equal to 6, though the third sub-field SF3 having a weight of 1, the fourth sub-field SF4 having a weight of 2 and the fifth sub-field SF5 having a weight of 3 may be displayed, the first sub-field SF1 having a weight of 4, that is, the divided sub-field SF1-1 having a weight of 2 and the divided sub-field SF1-2 having a weight of 2, and the fourth sub-field SF4 having a weight of 2 are displayed in the embodiment in place of the third, fourth and fifth sub-fields SF3, SF4 and SF5.
  • the above-mentioned order of displaying the sub-fields is determined by the central processing unit 24.
  • a smaller number is assigned to divided sub-fields, and a combination of sub-fields is selected for each of gray scales so as to allow a sub-field having a smaller number to be displayed preferentially to other sub-fields having a higher number. Accordingly, as explained in the above-mentioned examples where the gray scale numbers are 4 and 6, the divided sub-fields are absolutely turned on for a gray scale in which the divided sub-field or sub-fields can be turned on.
  • the divided sub-field or sub-fields is(are) displayed preferentially to the non-divided sub-fields, ensuring that the number of gray scales at which pseudo-100 Hz display is accomplished can be increased in comparison with the conventional apparatus. This means that a ratio of gray scales at which flickers are generated to the total number of gray scales can be reduced, and hence, flickers can be reduced.
  • FIG. 8 is a table showing both sub-fields to be displayed in the apparatus 10 for each of gray scales 1 to 16 and sub-fields to be displayed in the conventional apparatus illustrated in FIG. 3.
  • a circle ( ⁇ ) indicates a sub-field to be displayed in the conventional apparatus illustrated in FIG. 3, and a triangle ( ⁇ ) indicates a sub-field to be displayed in the apparatus 10.
  • gray scales there are six gray scales at which the divided sub-field or sub-fields is(are) displayed in the apparatus 10, but is(are) not displayed in the conventional apparatus illustrated in FIG. 3. Such gray scales are indicated with a double circle (o) at the rightmost column.
  • the gray scales 1 to 16 the divided sub-field or sub-fields is(are) displayed in the apparatus 10, but is(are) not displayed in the conventional apparatus illustrated in FIG. 3, at gray scales 4, 5, 6, 10, 11 and 12.
  • the divided sub-field or sub-fields is(are) displayed preferentially to the non-divided sub-fields, and hence, the number of the divided sub-fields to be displayed can be increased.
  • the number of gray scales at which pseudo-100 Hz display is accomplished can be increased, and thus, a ratio of gray scales at which flickers are generated to the total number of gray scales can be reduced. Accordingly, flickers can be reduced.
  • the above-mentioned method to be carried out in the apparatus 10 may be carried out only when a field frequency is smaller than 60 Hz, in which case, as a method of displaying a sub-field to be carried out when a field frequency is equal to or greater than 60 Hz, any method may be selected. For instance, sub-fields may be turned on in a descending order of a weight. As an alternative, when some of sub-fields having a high weight is divided, non-divided sub-field or sub-fields may be displayed preferentially to divided sub-field or sub-fields.
  • An order of displaying sub-fields when a field frequency is equal to or greater than 60 Hz may be different from an order of displaying sub-fields when a field frequency is smaller than 60 Hz, in which case, there may be selected an order of displaying sub-fields where divided sub-field or sub-fields are displayed preferentially to non-divided sub-field or sub-fields like the above-mentioned embodiment, as an order of displaying sub-fields when a field frequency is smaller than 60 Hz.
  • the apparatus 10 in accordance with the above-mentioned embodiment may be applied to all apparatuses which display images through a sub-field process.
  • the apparatus 10 in accordance with the above-mentioned embodiment may be applied to a plasma display panel (PDP), a digital micro-mirror device (DMD) or an organic electroluminescence device.
  • PDP plasma display panel
  • DMD digital micro-mirror device
  • organic electroluminescence device organic electroluminescence
EP20030021482 2002-09-30 2003-09-23 Méthode d'affichage d'images sur un dispositif d'affichage, et dispositif d'affichage utilisé à cet effet Ceased EP1403843A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002285711 2002-09-30
JP2002285711A JP3656995B2 (ja) 2002-09-30 2002-09-30 画像表示方法及び画像表示装置

Publications (1)

Publication Number Publication Date
EP1403843A1 true EP1403843A1 (fr) 2004-03-31

Family

ID=31973403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030021482 Ceased EP1403843A1 (fr) 2002-09-30 2003-09-23 Méthode d'affichage d'images sur un dispositif d'affichage, et dispositif d'affichage utilisé à cet effet

Country Status (3)

Country Link
EP (1) EP1403843A1 (fr)
JP (1) JP3656995B2 (fr)
CN (1) CN1497518A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647966A1 (fr) * 2004-10-18 2006-04-19 Tohoku Pioneer Corporation Appareil de commande pour panneau électroluminescent et machine électronique sur laquelle l'appareil est monté
EP1801775A1 (fr) * 2005-12-20 2007-06-27 Deutsche Thomson-Brandt Gmbh Procédé d'affichage d'une image ou d'un affichage électroluminescent et appareil respectif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI469118B (zh) * 2012-07-16 2015-01-11 Raydium Semiconductor Corp 顯示裝置及其源極驅動器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07271325A (ja) * 1994-02-08 1995-10-20 Fujitsu Ltd フレーム内時分割型表示装置及びフレーム内時分割型表示装置に於ける中間調表示方法
EP0838799A1 (fr) * 1996-10-23 1998-04-29 Nec Corporation Système d'affichage à niveaux de gris
US5986640A (en) * 1992-10-15 1999-11-16 Digital Projection Limited Display device using time division modulation to display grey scale
JP2001042818A (ja) * 1999-07-28 2001-02-16 Nec Corp プラズマディスプレイの表示方法
EP1176578A2 (fr) * 2000-07-27 2002-01-30 Sony Corporation Méthode et dispositif de commande d'un dispositif d'affichage
EP1990795A1 (fr) * 2006-02-28 2008-11-12 Matsushita Electric Industrial Co., Ltd. Dispositif a ecran plasma et son procede de commande

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5986640A (en) * 1992-10-15 1999-11-16 Digital Projection Limited Display device using time division modulation to display grey scale
JPH07271325A (ja) * 1994-02-08 1995-10-20 Fujitsu Ltd フレーム内時分割型表示装置及びフレーム内時分割型表示装置に於ける中間調表示方法
EP0838799A1 (fr) * 1996-10-23 1998-04-29 Nec Corporation Système d'affichage à niveaux de gris
JP2001042818A (ja) * 1999-07-28 2001-02-16 Nec Corp プラズマディスプレイの表示方法
EP1176578A2 (fr) * 2000-07-27 2002-01-30 Sony Corporation Méthode et dispositif de commande d'un dispositif d'affichage
EP1990795A1 (fr) * 2006-02-28 2008-11-12 Matsushita Electric Industrial Co., Ltd. Dispositif a ecran plasma et son procede de commande

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 19 5 June 2001 (2001-06-05) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647966A1 (fr) * 2004-10-18 2006-04-19 Tohoku Pioneer Corporation Appareil de commande pour panneau électroluminescent et machine électronique sur laquelle l'appareil est monté
EP1801775A1 (fr) * 2005-12-20 2007-06-27 Deutsche Thomson-Brandt Gmbh Procédé d'affichage d'une image ou d'un affichage électroluminescent et appareil respectif
CN101341525B (zh) * 2005-12-20 2010-12-08 汤姆森特许公司 在有机发光显示器上显示图像的方法及各自装置
EP1964092B1 (fr) * 2005-12-20 2019-08-07 Thomson Licensing Procédé d'affichage d'une image ou d'un affichage électroluminescent et appareil respectif

Also Published As

Publication number Publication date
CN1497518A (zh) 2004-05-19
JP2004125853A (ja) 2004-04-22
JP3656995B2 (ja) 2005-06-08

Similar Documents

Publication Publication Date Title
US6608610B2 (en) Plasma display device drive identifies signal format of the input video signal to select previously determined control information to drive the display
KR100467447B1 (ko) 플라즈마 디스플레이 패널의 화상 표시 방법 및 그 장치
US6552701B1 (en) Display method for plasma display device
KR100926506B1 (ko) 플라즈마 디스플레이를 위한 움직임 보상된 상향변환
EP0978816A1 (fr) Procédé et dispositif de traitement d'images vidéo, en particulier pour la compensation de l'effet de faux contours
US6008793A (en) Drive apparatus for self light emitting display unit
CN100378772C (zh) 用于在等离子显示板上显示画面时减少闪烁的方法和装置
WO2000043979A1 (fr) Appareil et procede permettant de realiser l'affichage d'une echelle de gris au moyen de sous-zones
JP3345184B2 (ja) マルチスキャン適応型プラズマディスプレイ装置及びその駆動方法
AU738827B2 (en) Dynamic image correction method and dynamic image correction circuit for display Device
US6249268B1 (en) Image display apparatus
JP3711378B2 (ja) 中間調表示方法及び中間調表示装置
JPH07261696A (ja) 階調表示方法
JPH09218662A (ja) 自発光画像表示パネルの駆動方法
JP2002323872A (ja) プラズマディスプレイパネルの駆動方法及びプラズマ表示装置
KR100438604B1 (ko) 플라즈마 디스플레이 패널의 계조표시 처리방법
JPH09258688A (ja) ディスプレイ装置
JPH077702A (ja) プラズマディスプレイ表示装置
EP1403843A1 (fr) Méthode d'affichage d'images sur un dispositif d'affichage, et dispositif d'affichage utilisé à cet effet
JPH07248743A (ja) 階調表示方法
JPH07264515A (ja) 階調表示方法
KR100446760B1 (ko) 계조표시 방법 및 표시장치
JP3564951B2 (ja) Ｐｄｐ表示装置
JP2001343930A (ja) 表示装置及び表示装置の階調表示方法
JP2002366085A (ja) 表示装置及び階調表示処理方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040211

17Q First examination report despatched

Effective date: 20040607

AKX Designation fees paid

Designated state(s): DE FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PIONEER PLASMA DISPLAY CORPORATION

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PIONEER CORPORATION

17Q First examination report despatched

Effective date: 20040607

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PANASONIC CORPORATION

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20100614