公开(公告)号：US09717127B1

公开(公告)日：2017-07-25

申请号：US15339961

申请日：2016-11-01

Applicant: Lextar Electronics Corporation

Inventor： Chien-Nan Yeh ,  Chun-Jong Chang ,  Po-Shen Chen ,  Jhao-Cyuan Huang ,  Tzu-Hao Liu

IPC: H05B33/08 ,  F21V23/04 ,  F21Y115/10

CPC classification number: H05B33/0845 ,  F21V23/04 ,  F21Y2115/10 ,  H05B33/0815

Abstract: A dimming system includes a signal generating circuit, a first dimming circuit and a second dimming circuit. The signal generating circuit generates the driving signal according to the input signal, and switches the driving signal between multiple states according to the switch signal. The first dimming circuit generates the dimming signal to adjust the luminance of the LED device according to the driving signal. When the driving signal is switched from the first states to the second states, the dimming signal is changed by the first dimming circuit so that the luminance of the LED device is adjusted from the first luminance to the second luminance. The second dimming circuit adjusts the input signal according to the control signal so that the dimming signal is adjusted and the luminance of the LED device is between the first luminance and minimum luminance, or between the second luminance and minimum luminance.

公开(公告)号：US20170202066A1

公开(公告)日：2017-07-13

申请号：US15339961

申请日：2016-11-01

Applicant: Lextar Electronics Corporation

Inventor： Chien-Nan Yeh ,  Chun-Jong Chang ,  Po-Shen Chen ,  Jhao-Cyuan Huang ,  Tzu-Hao Liu

IPC: H05B33/08 ,  F21V23/04

CPC classification number: H05B33/0845 ,  F21V23/04 ,  F21Y2115/10 ,  H05B33/0815

Abstract: A dimming system includes a signal generating circuit, a first dimming circuit and a second dimming circuit. The signal generating circuit generates the driving signal according to the input signal, and switches the driving signal between multiple states according to the switch signal. The first dimming circuit generates the dimming signal to adjust the luminance of the LED device according to the driving signal. When the driving signal is switched from the first states to the second states, the dimming signal is changed by the first dimming circuit so that the luminance of the LED device is adjusted from the first luminance to the second luminance. The second dimming circuit adjusts the input signal according to the control signal so that the dimming signal is adjusted and the luminance of the LED device is between the first luminance and minimum luminance, or between the second luminance and minimum luminance.