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1. (WO2017110073) PROTECTIVE DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/110073 International Application No.: PCT/JP2016/005157
Publication Date: 29.06.2017 International Filing Date: 16.12.2016
IPC:
H04R 3/00 (2006.01) ,H03F 1/52 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
52
Circuit arrangements for protecting such amplifiers
Applicants:
パナソニックIPマネジメント株式会社 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. [JP/JP]; 大阪府大阪市中央区城見2丁目1番61号 1-61, Shiromi 2-chome, Chuo-ku, Osaka-shi, Osaka 5406207, JP
Inventors:
中田 康夫 NAKATA, Yasuo; --
Agent:
鎌田 健司 KAMATA, Kenji; JP
前田 浩夫 MAEDA, Hiroo; JP
Priority Data:
2015-25486325.12.2015JP
Title (EN) PROTECTIVE DEVICE
(FR) DISPOSITIF DE PROTECTION
(JA) 保護装置
Abstract:
(EN) A protective device for detecting an abnormal current in a drive circuit for driving a speaker comprises a sound level detection unit , a current level detection unit, and a determination unit. The sound level detection unit detects a sound level of a sound signal outputted to the drive circuit. The current level detection unit detects a current level of a current flowing from a power source to the drive circuit. The determination unit generates a protection command signal if a current level higher than a second threshold is detected when the sound level of the sound signal is lower than a first threshold on the basis of a detection signal of the sound level and a detection signal of the current level.
(FR) L’invention concerne un dispositif de protection qui permet de détecter un courant anormal dans un circuit d'excitation pour exciter un haut-parleur, ledit dispositif de protection comprenant une unité de détection de niveau sonore, une unité de détection de niveau de courant et une unité de détermination. L’unité de détection de niveau sonore détecte un niveau sonore d’un signal sonore fourni au circuit d'excitation. L’unité de détection de niveau de courant détecte un niveau de courant d’un courant circulant d’une source d’alimentation au circuit d'excitation. L’unité de détermination génère un signal d’instruction de protection si un niveau de courant supérieur à un second seuil est détecté lorsque le niveau sonore du signal sonore est inférieur à un premier seuil, sur la base d’un signal de détection du niveau sonore et d’un signal de détection du niveau de courant.
(JA) スピーカを駆動する駆動回路における異常電流を検出する保護装置が、音声レベル検出部と、電流レベル検出部と、判定部と、を有する。音声レベル検出部は、駆動回路に出力される音声信号の音声レベルを検出する。電流レベル検出部は、電源から駆動回路に通流する電流の電流レベルを検出する。判定部は、音声レベルの検出信号と電流レベルの検出信号に基づいて、音声信号の音声レベルが第1の閾値よりも小さいときに、第2の閾値よりも大きい電流レベルが検出された場合、保護指令信号を生成する。
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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, 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 Organization (AM, AZ, BY, KG, KZ, 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, 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)
Also published as:
CN108476355EP3379846US20180358937