EP 3772872 A1 20210210 - LUMINANCE SMOOTHENING SYSTEM AND LUMINANCE CONTROLLER THEREOF
Title (en)
LUMINANCE SMOOTHENING SYSTEM AND LUMINANCE CONTROLLER THEREOF
Title (de)
LUMINANZAUSGLEICHSSYSTEM UND LUMINANZSTEUERGERÄT DAFÜR
Title (fr)
SYSTÈME DE LISSAGE DE LUMINANCE ET ORGANE DE COMMANDE DE LUMINANCE CORRESPONDANT
Publication
Application
Priority
CN 201910735924 A 20190809
Abstract (en)
A luminance smoothening system includes an illuminating unit, an ambient luminance sensor and a luminance controller. The ambient luminance sensor detects an analog ambient luminance. The luminance controller includes an A/D converter and an adaptive luminance adjusting module. The A/D converter is electrically coupled to the ambient luminance sensor. The A/D converter receives the analog ambient luminance signal. The A/D converter transforms the analog ambient luminance signal to a digital ambient luminance signal. The adaptive luminance adjusting module is electrically coupled to the illuminating unit. The adaptive luminance adjusting module generates an output luminance control signal at a current stage based on a first adjusted ratio of the digital ambient luminance signal at the current stage and a second adjusted ratio of the output luminance control signal at a previous stage. The adaptive luminance adjusting module controls the illuminating unit using the output luminance control signal at the current stage.
IPC 8 full level
H05B 44/00 (2022.01); H05B 45/12 (2020.01); H05B 47/11 (2020.01)
CPC (source: EP)
H05B 45/12 (2020.01); H05B 47/11 (2020.01)
Citation (search report)
- [Y] US 2015230318 A1 20150813 - GO JAE-CHUN [KR], et al
- [Y] US 10091854 B1 20181002 - BRANDON II MICHAEL J [US]
- [Y] CN 202261956 U 20120530 - SICHUAN SUNFOR LIGHTING CO LTD
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 3772872 A1 20210210; EP 3772872 B1 20220629; CN 110602818 A 20191220; CN 110602818 B 20220107
DOCDB simple family (application)
EP 20189838 A 20200806; CN 201910735924 A 20190809