Global Patent Index - EP 3905852 A1

EP 3905852 A1 20211103 - CURRENT CONTROL APPARATUS WITH HIGH PRECISION CONTROL

Title (en)

CURRENT CONTROL APPARATUS WITH HIGH PRECISION CONTROL

Title (de)

STROMREGELUNGSVORRICHTUNG MIT HOCHPRÄZISER STEUERUNG

Title (fr)

APPAREIL DE COMMANDE DE COURANT À COMMANDE HAUTE PRÉCISION

Publication

EP 3905852 A1 20211103 (EN)

Application

EP 20187030 A 20200721

Priority

CN 202020664452 U 20200427

Abstract (en)

A current control apparatus with high precision control is configured to provide a current control for an LED light string (LED_1). The current control apparatus includes a light string switch (Ql), a plurality of resistor branches (Br_1-Br_n), and a controller (100). The light string switch (Ql) is coupled in series to the LED light string (LED_1). The resistor branches (Br_1-Br_n) are electrically coupled to the LED light string (LED_1). Each of the resistor branches (Br_1-Br_n) includes a resistor (Rset_1-Rset_n) and a branch switch (Qr1-Qrn) coupled in series to the resistor (Rset_1-Rset_n). The controller (100) provides a light string control signal (LED_1_EN) and a plurality of branch control signals (LED _CTRL 1-LED CTRL_n). The light string control signal (LED_1_EN) turns on and turns off the LED light string (LED_1), and the branch control signals (LED_CTRL_1-LED_CTRL_n) respectively turn on and turn off the branch switches (Qrl-Qrn).

IPC 8 full level

H05B 45/10 (2020.01); H05B 45/40 (2020.01)

CPC (source: EP)

H05B 45/10 (2020.01); H05B 45/40 (2020.01)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3905852 A1 20211103; CN 212544114 U 20210212; JP 3228646 U 20201105

DOCDB simple family (application)

EP 20187030 A 20200721; CN 202020664452 U 20200427; JP 2020003137 U 20200728