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1. (WO2011016289) LIGHTING EQUIPMENT
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Pub. No.:
WO/2011/016289
International Application No.:
PCT/JP2010/060109
Publication Date:
10.02.2011
International Filing Date:
15.06.2010
IPC:
H05B 37/02
(2006.01),
H01L 33/00
(2010.01)
H
ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
B
ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
37
Circuit arrangements for electric light sources in general
02
Controlling
H
ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
33
Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
Applicants:
SHARP KABUSHIKI KAISHA
[JP/JP]; 22-22, Nagaike-cho, Abeno-ku, Osaka-shi, Osaka 5458522 (JP)
(For All Designated States Except US)
.
UHARA, Hiroto
;
(For US Only)
Inventors:
UHARA, Hiroto
;
Agent:
KOHNO, Takao
; KOHNO PATENT OFFICE, 4-3, Tsuriganecho 2-chome, Chuo-ku, Osaka-shi, Osaka 5400035 (JP)
Priority Data:
2009-185169
07.08.2009
JP
Title
(EN)
LIGHTING EQUIPMENT
(FR)
EQUIPEMENT D'ÉCLAIRAGE
(JA)
照明装置
Abstract:
(EN)
Lighting equipment is provided which uses light emitting diodes that can be light-modulated by using a simple structure to vary a current flowing through the light emitting diodes. In the lighting equipment: a current is supplied from a DC power supply (2, 3, 4, C) to the light emitting diodes (LED); the current flowing through the light emitting diodes (LED) is detected; and the DC power supply (2, 3, 4, C) is on/off-controlled based on the detected current, thereby controlling the current flowing through the light emitting diodes. The lighting equipment comprises: a resistor (Rsc) connected between the DC power supply (2, 3, 4, C) and a fixed potential terminal; a voltage divider circuit (9) for dividing a given voltage; a PWM control circuit (6) for controlling the variation of the voltage division ratio of the voltage divider circuit (9) by means of a PWM control using a duty ratio that is in accordance with an operation of setting the brightness; an FET; and a comparator circuit (COMP) for comparing a voltage related to the voltage across the resistor (Rsc) with an output voltage of the voltage divider circuit (9). The DC power supply (2, 3, 4, C) is on/off-controlled in accordance with a result of the comparison of the comparator circuit (COMP).
(FR)
L'invention concerne un équipement d'éclairage utilisant des diodes électroluminescentes pouvant être modulées en lumière en utilisant une structure simple pour faire varier un courant circulant à travers les diodes électroluminescentes. Dans l'équipement d'éclairage : un courant est fourni par une alimentation électrique CC (2, 3, 4, C) aux diodes électroluminescentes ; le courant circulant à travers les diodes électroluminescentes est détecté ; et l'alimentation électrique CC (2, 3, 4, C) est mise en marche/arrêtée sur la base du courant détecté, commandant ainsi le courant qui s'écoule à travers les diodes électroluminescentes. L'équipement d'éclairage comprend : une résistance (Rsc) raccordée entre l'alimentation électrique CC (2, 3, 4, C) et une borne de potentiel fixe ; un circuit diviseur de tension (9) pour diviser une tension donnée ; un circuit de commande PWM (6) pour commander la variation du rapport de division de tension du circuit diviseur de tension (9) au moyen d'une commande PWM en utilisant un facteur de marche selon une opération de réglage de la brillance ; un transistor à effet de champ ; et un circuit comparateur (COMP) pour comparer une tension liée à la tension sur la résistance (Rsc) avec une tension de sortie du circuit diviseur de tension (9). L'alimentation électrique CC (2, 3, 4, C) est mise en marche/arrêtée selon un résultat de la comparaison du circuit comparateur (COMP).
(JA)
簡単な構成で発光ダイオードに流れる電流を変更して、調光することができる発光ダイオードを使用した照明装置を提供する。 発光ダイオードLEDに直流電源2,3,4,Cから電流を供給し、発光ダイオードLEDに流れる電流を検出し、検出した電流に基づき、直流電源2,3,4,Cをオン/オフ制御することにより、発光ダイオードに流れる電流を制御する照明装置。直流電源2,3,4,C及び固定電位端子間に接続された抵抗Rscと、所定電圧を分圧する分圧回路9と、明るさを設定する操作に応じたデューティ比によるPWM制御で分圧回路9の分圧比を可変制御するPWM制御回路6,FETと、抵抗Rscの両端電圧に関連する電圧、及び分圧回路9の出力電圧を比較する比較回路COMPとを備え、比較回路COMPの比較結果に応じて直流電源2,3,4,Cをオン/オフ制御する。
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, 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 (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language:
Japanese (
JA
)
Filing Language:
Japanese (
JA
)