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1. WO2001045397 - METHOD OF AND UNIT FOR DISPLAYING AN IMAGE WITH SUB-FIELDS

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Publication Number WO/2001/045397
Publication Date 21.06.2001
International Application No. PCT/EP2000/012220
International Filing Date 04.12.2000
IPC
G09G 3/20 2006.1
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
G09G 3/28 2006.1
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
22using controlled light sources
28using luminous gas-discharge panels, e.g. plasma panels
G09G 3/36 2006.1
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
34by control of light from an independent source
36using liquid crystals
G09G 5/10 2006.1
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
10Intensity circuits
H04N 5/66 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
66Transforming electric information into light information
CPC
G09G 2320/0261
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0261in the context of movement of objects on the screen or movement of the observer relative to the screen
G09G 2320/0266
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2320Control of display operating conditions
02Improving the quality of display appearance
0266Reduction of sub-frame artefacts
G09G 3/2022
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
2007Display of intermediate tones
2018by time modulation using two or more time intervals
2022using sub-frames
G09G 3/2029
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
2007Display of intermediate tones
2018by time modulation using two or more time intervals
2022using sub-frames
2029the sub-frames having non-binary weights
G09G 3/2059
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
2007Display of intermediate tones
2059using error diffusion
G09G 3/296
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20for 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
22using controlled light sources
28using luminous gas-discharge panels, e.g. plasma panels
288using AC panels
296Driving circuits for producing the waveforms applied to the driving electrodes
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL]
Inventors
  • VAN DALFSEN, Age, J.
  • VAN SPLUNTER, Marinus
Agents
  • GRAVENDEEL, Cornelis
Priority Data
99204371.117.12.1999EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF AND UNIT FOR DISPLAYING AN IMAGE WITH SUB-FIELDS
(FR) PROCEDE ET UNITE DESTINES A AFFICHER UNE IMAGE DANS DES SOUS-CHAMPS
front page image
Abstract
(EN) A display device (506) is driven in a number of sub-fields. Each of the sub-fields is for outputting a respective illumination level by the display device. In each sub-field, a pixel of the displayed image may emit an amount of light corresponding to the particular sub-field, depending on whether it is switched on or not. A required intensity level of the pixel is realized by selecting an appropriate combination of sub-fields in which the pixel is switched on. According to the invention, a selection is made from the possible intensity levels that can be generated by all possible combinations of sub-fields. This selection contains those intensity levels that can be generated by sub-fields that are temporally close together, thus causing that the light of a pixel is emitted during a relatively short period. The image display unit (300) has a means (306) that is arranged to store the combinations of sub-fields for the respective selected intensity levels.
(FR) L'invention concerne un dispositif d'affichage (506) piloté dans un nombre de sous-champs. Chacun des sous-champs sert à sortir un niveau d'éclairage respectif pour le dispositif d'affichage. Dans chaque sous-champ, un pixel de l'image affichée peut, s'il est activé, émettre une quantité de lumière correspondant au sous-champ particulier. On réalise un niveau d'intensité recherché du pixel par sélection d'une combinaison appropriée de sous-champs. Selon l'invention, on effectue une sélection à partir des niveaux d'intensité possibles qui peuvent être produits par toutes les combinaisons possibles de sous-champs. Cette sélection contient les niveaux d'intensité qui peuvent être produits par des sous-champs qui sont temporellement proches les uns des autres, ce qui a pour résultat une durée relativement courte de l'émission lumineuse d'un pixel. L'unité d'affichage d'image (300) comprend des moyens (306) conçus de façon à stocker les combinaisons des sous-champs concernant les niveaux d'intensité sélectionnés respectifs.
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