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1. US20010040519 - Video signal processing circuit, video display and electronic equipment both using the circuit, and method of adjusting output of digital-analog converters

Office États-Unis d'Amérique
Numéro de la demande 09242905
Date de la demande 25.02.1999
Numéro de publication 20010040519
Date de publication 15.11.2001
Numéro de délivrance 6452526
Date de délivrance 17.09.2002
Type de publication B2
CIB
H03M 11/00
HÉLECTRICITÉ
03CIRCUITS ÉLECTRONIQUES FONDAMENTAUX
MCODAGE, DÉCODAGE OU CONVERSION DE CODE, EN GÉNÉRAL
11Codage en relation avec des claviers ou des dispositifs similaires, c. à d. codage de la position des touches actionnées
H03M 1/66
HÉLECTRICITÉ
03CIRCUITS ÉLECTRONIQUES FONDAMENTAUX
MCODAGE, DÉCODAGE OU CONVERSION DE CODE, EN GÉNÉRAL
1Conversion analogique/numérique; Conversion numérique/analogique
66Convertisseurs numériques/analogiques
G09G 3/36
GPHYSIQUE
09ENSEIGNEMENT; CRYPTOGRAPHIE; PRÉSENTATION; PUBLICITÉ; SCEAUX
GDISPOSITIONS OU CIRCUITS POUR LA COMMANDE DE L'AFFICHAGE UTILISANT DES MOYENS STATIQUES POUR PRÉSENTER UNE INFORMATION VARIABLE
3Dispositions ou circuits de commande présentant un intérêt uniquement pour l'affichage utilisant des moyens de visualisation autres que les tubes à rayons cathodiques
20pour la présentation d'un ensemble de plusieurs caractères, p.ex. d'une page, en composant l'ensemble par combinaison d'éléments individuels disposés en matrice
34en commandant la lumière provenant d'une source indépendante
36utilisant des cristaux liquides
H04N 5/66
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
5Détails des systèmes de télévision
66Transformation de l'information électrique en information lumineuse
CPC
G09G 3/3685
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
34by control of light from an independent source
36using liquid crystals
3611Control of matrices with row and column drivers
3685Details of drivers for data electrodes
G09G 3/3614
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
34by control of light from an independent source
36using liquid crystals
3611Control of matrices with row and column drivers
3614Control of polarity reversal in general
G09G 3/3688
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
34by control of light from an independent source
36using liquid crystals
3611Control of matrices with row and column drivers
3685Details of drivers for data electrodes
3688suitable for active matrices only
G09G 2310/027
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2310Command of the display device
02Addressing, scanning or driving the display screen or processing steps related thereto
0264Details of driving circuits
027Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
G09G 2310/0297
GPHYSICS
09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
2310Command of the display device
02Addressing, scanning or driving the display screen or processing steps related thereto
0264Details of driving circuits
0297Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
H04N 5/66
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
66Transforming electric information into light information
Déposants Seiko Epson Corporation
Inventeurs Sagawa, Takahiro
Kaburagi, Chiharu
Kurumisawa, Takashi
Mandataires Oliff & Berridge, PLC
Données relatives à la priorité 09174474 30.06.1997 JP
Titre
(EN) Video signal processing circuit, video display and electronic equipment both using the circuit, and method of adjusting output of digital-analog converters
Abrégé
(EN)

An image signal processing circuit (102) includes a phase-expansion circuit (103), a digital polarity-inversion circuit (104), first to sixth D/A converters (111to116), and first to sixth operational amplifiers (151to156). The resistance value of the first to sixth amplitude adjusting resistors (121to126) which cause the output amplitude of an analog signal output from the first to sixth D/A converters (111to116) to be fixed is adjusted by laser trimming. First to sixth gain setting resistors (161to166) are connected to the first to sixth operational amplifiers (151to156). The first gain setting resistor (161) includes a first resistor (131) and a second resistor (141), and the gain of the operational amplifier (151) is set by the resistance ratio (R2/R1) thereof. In order that this resistance ratio (R2/R1) is fixed for each set, the first resistor (131) and the second resistor (141) are formed on the same substrate by undergoing the same manufacturing process. As a result, there is no need to use the first and second resistors (131, 141) for variable resistors.

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