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1. WO2009044909 - VIDEO DISPLAY DEVICE AND LIGHT SOURCE DRIVING METHOD THEREOF

Publication Number WO/2009/044909
Publication Date 09.04.2009
International Application No. PCT/JP2008/068141
International Filing Date 06.10.2008
IPC
G09G 3/36 2006.01
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
G02F 1/133 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
G03B 21/14 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
G09G 3/02 2006.01
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
02by tracing or scanning a light beam on a screen
G09G 3/20 2006.01
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 3/34 2006.01
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
CPC
G03B 21/005
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
005Projectors using an electronic spatial light modulator but not peculiar thereto
G03B 21/008
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
005Projectors using an electronic spatial light modulator but not peculiar thereto
008using micromirror devices
G03B 21/208
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
14Details
20Lamp housings
208Homogenising, shaping of the illumination light
G03B 33/12
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
33Colour photography, other than mere exposure or projection of a colour film
10Simultaneous recording or projection
12using beam-splitting or beam-combining systems, e.g. dichroic mirrors
G09G 2310/0235
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
0235Field-sequential colour display
G09G 2310/066
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
06Details of flat display driving waveforms
066Waveforms comprising a gently increasing or decreasing portion, e.g. ramp
Applicants
  • NECディスプレイソリューションズ株式会社 NEC DISPLAY SOLUTIONS, LTD. [JP]/[JP] (AllExceptUS)
  • 片岡 亨 KATAOKA, Tooru [JP]/[JP] (UsOnly)
Inventors
  • 片岡 亨 KATAOKA, Tooru
Agents
  • 宮崎 昭夫 MIYAZAKI, Teruo
Priority Data
2007-26083204.10.2007JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) VIDEO DISPLAY DEVICE AND LIGHT SOURCE DRIVING METHOD THEREOF
(FR) DISPOSITIF D'AFFICHAGE VIDÉO ET SON PROCÉDÉ DE COMMANDE DE SOURCE LUMINEUSE
(JA) 映像表示装置及びその光源駆動方法
Abstract
(EN)
A video display device of a color sequential display type. A period from the start of writing image data into a display panel to the completion of image display on the basis of the image data in a sub frame is supposed to be a panel video writing period. A light source drive circuit generates a drive signal for gradually raising the luminance of the light source of a color corresponding to a display image in the present sub frame from zero to a predetermined value within the panel video writing period of the present sub frame and gradually lowering the luminance of the light source from the predetermined value to zero within the panel video writing period of the next sub frame. A light source driver makes the light source emit light according to the drive signal.
(FR)
L'invention concerne un dispositif d'affichage vidéo du type affichage séquentiel des couleurs. Une période allant du début de l'écriture des données d'image dans un panneau d'affichage jusqu'à la fin de l'affichage de l'image sur la base des données d'image dans une sous-trame est supposée être une période d'écriture vidéo du panneau. Un circuit de commande de source lumineuse génère un signal de commande destiné à augmenter progressivement la luminance de la source lumineuse d'une couleur correspondant à une image d'affichage dans la sous-trame présente de zéro à une valeur prédéterminée durant la période d'écriture vidéo du panneau de la sous-trame présente et à diminuer progressivement la luminance de la source lumineuse de la valeur prédéterminée à zéro durant la période d'écriture vidéo du panneau de la sous-trame suivante. Un circuit d'excitation de source lumineuse incite la source lumineuse à émettre une lumière conformément au signal de commande.
(JA)
 色順次表示方式の映像表示装置において、サブフレームにおける、表示パネルに対する画像データの書き込み開始から該画像データに基づく画像表示が完了するまでの期間をパネル映像書き込み期間としたとき、光源駆動回路は、現サブフレームのパネル映像書き込み期間内で該現サブフレームの表示画像に対応する色の光源の輝度を零から所定値まで徐々に上昇させ、次のサブフレームのパネル映像書き込み期間内で該光源の輝度を所定値から零まで徐々に下降させる駆動信号を生成する。光源ドライバは駆動信号にしたがって光源を発光させる。
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