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1. (WO2019049670) LIQUID CRYSTAL PANEL DRIVING CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE
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Pub. No.: WO/2019/049670 International Application No.: PCT/JP2018/031060
Publication Date: 14.03.2019 International Filing Date: 23.08.2018
IPC:
G09G 3/18 (2006.01) ,G09G 3/04 (2006.01) ,G09G 3/20 (2006.01)
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
04
for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments
16
by control of light from an independent source
18
using liquid crystals
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
04
for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
3
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
20
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
Applicants:
株式会社デンソー DENSO CORPORATION [JP/JP]; 愛知県刈谷市昭和町1丁目1番地 1-1, Showa-cho, Kariya-city Aichi 4488661, JP
Inventors:
山内 俊治 YAMAUCHI Shunji; JP
Agent:
金 順姫 JIN Shunji; JP
Priority Data:
2017-17058405.09.2017JP
Title (EN) LIQUID CRYSTAL PANEL DRIVING CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE
(FR) CIRCUIT D'ATTAQUE DE PANNEAU À CRISTAUX LIQUIDES ET DISPOSITIF D'AFFICHAGE À CRISTAUX LIQUIDES
(JA) 液晶パネルの駆動回路および液晶表示装置
Abstract:
(EN) This liquid crystal panel driving circuit comprises: a voltage output unit (40) that is equipped with a pulse signal output port that outputs an adjustable-pulse-width pulse signal, and a first port and a second port that can switch between outputting a direct-current power supply voltage and outputting a ground voltage; a resistance voltage divider circuit (50) that is connected to the first port and the second port; and a low pass filter (60), an input side of which is connected to a voltage output node of the resistance voltage divider circuit and the pulse signal output port, and an output side of which is connected to a terminal (21) that outputs a voltage to a liquid crystal panel. If a liquid crystal panel segment is to be turned off, the voltage output unit executes off control of alternating a state in which the direct-current power supply voltage is output from the first port and the ground voltage is output from the second port and a state in which the ground voltage is output from the first port and the direct-current power supply voltage is output from the second port; and if a segment is to be turned on with an intermediate gradation, the voltage output unit outputs a pulse signal with a duty ratio corresponding to an intermediate gradation.
(FR) L'invention concerne un circuit d'attaque de panneau à cristaux liquides comprenant : une unité de sortie de tension (40) qui est équipée d'un port de sortie de signal d'impulsion qui délivre un signal d'impulsion à largeur d'impulsion réglable, et d'un premier port et d'un second port qui peuvent alterner entre l'émission d'une tension d'alimentation en courant continu et l'émission d'une tension de masse ; un circuit diviseur de tension de résistance (50) qui est connecté au premier port et au second port ; et un filtre passe-bas (60), dont un côté d'entrée est connecté à un nœud de sortie de tension du circuit diviseur de tension de résistance et au port de sortie de signal d'impulsion, et dont un côté de sortie est connecté à une borne (21) qui délivre une tension à un panneau à cristaux liquides. Si un segment de panneau à cristaux liquides doit être éteint, l'unité de sortie de tension exécute la commande de mise en hors tension consistant à alterner entre un état dans lequel la tension d'alimentation en courant continu est délivrée par le premier port et la tension de masse est délivrée par le second port et un état dans lequel la tension de masse est délivrée par le premier port et la tension d'alimentation en courant continu est délivrée par le second port ; et si un segment doit être allumé avec une gradation intermédiaire, l'unité de sortie de tension délivre un signal d'impulsion ayant un rapport cyclique correspondant à une gradation intermédiaire.
(JA) 液晶パネルの駆動回路は、パルス幅変調可能なパルス信号を出力するパルス信号出力ポートと、直流電源電圧およびグランド電圧を切り換え可能に出力する第1ポート、第2ポートとを備えた電圧出力部(40)と、第1ポートと第2ポートに接続された抵抗分圧回路(50)と、入力側が、抵抗分圧回路の電圧出力点およびパルス信号出力ポートに接続されており、出力側が液晶パネルへ電圧を出力する端子(21)に接続されているローパスフィルタ(60)とを備える。電圧出力部は、液晶パネルのセグメントを消灯させる場合、第1ポートから直流電源電圧を出力し第2ポートからグランド電圧を出力する状態と、第1ポートからグランド電圧を出力し第2ポートから直流電源電圧を出力する状態とを交互に繰り返すオフ制御を実行し、セグメントを中間階調で点灯させる場合、中間階調に応じたデューティ比のパルス信号を出力する。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)