公开(公告)号：US20160174315A1

公开(公告)日：2016-06-16

申请号：US14953410

申请日：2015-11-29

Applicant: Lextar Electronics Corporation

Inventor： Chun-Jong CHANG ,  Jhao-Cyuan HUANG ,  Po-Shen CHEN ,  Chien-Nan YEH

IPC: H05B33/08

CPC classification number: H05B33/0824 ,  H05B33/0809 ,  H05B33/0845

Abstract: An illumination device includes a rectifier circuit, M light-emitting modules, and a control module. The rectifier circuit has a positive output terminal and a negative output terminal, and generates a driving voltage between the positive output terminal and the negative output terminal according to an input power. The M light-emitting modules are coupled between the positive output terminal and the negative output terminal. Each of the M light-emitting modules has a conduction voltage, and includes a light-emitting unit that includes at least one light-emitting diode. The control module is coupled between the rectifier circuit and the M light-emitting modules, and controls the M light-emitting modules to dynamically form S light-emitting diode strings coupled in parallel with each other. A number of the light-emitting units in each of the S light-emitting diode strings is N, in which S×N=M, where M, S, N are positive integers.

Abstract translation: 照明装置包括整流电路，M个发光模块和控制模块。 整流电路具有正输出端子和负输出端子，根据输入功率在正输出端子和负输出端子之间产生驱动电压。 M个发光模块耦合在正输出端和负输出端之间。 M个发光模块中的每一个具有导通电压，并且包括包括至少一个发光二极管的发光单元。 控制模块耦合在整流电路和M个发光模块之间，并且控制M个发光模块以动态地形成彼此并联耦合的S个发光二极管串。 S个发光二极管串中的多个发光单元是N，其中S×N = M，其中M，S，N是正整数。

公开(公告)号：US20250131872A1

公开(公告)日：2025-04-24

申请号：US18919728

申请日：2024-10-18

Applicant: Lextar Electronics Corporation

Inventor： Jui-Yi WU ,  Cheng-Yen TSAI ,  Kai-Hsiang SHIH ,  Chih-Hao LIN ,  Chien-Nan YEH

IPC: G09G3/32

Abstract: In order to maintain the white balance ratio of the mixed white light, a pixel unit is provided, which is composed of four sub-pixels of red, green, blue, and another green colors, and these sub-pixels are composed of a red LED element, a first green LED element, a blue LED element and a second green LED element. A control element is used to control the four sub-pixels of red, first green, blue and second green correspondingly by outputting control signals through the control channels. Base on the adjustment of the current, the brightness ratio of the above three colors is still maintained at the ratio of 3:6:1 of the white balance, and the ratio of the white balance of the white light after being mixed is also maintained.

公开(公告)号：US20200287104A1

公开(公告)日：2020-09-10

申请号：US16809531

申请日：2020-03-04

Applicant: Lextar Electronics Corporation

Inventor： Shiou-Yi KUO ,  Jian-Chin LIANG ,  Yu-Chun LEE ,  Fu-Hsin CHEN ,  Jo-Hsiang CHEN ,  Chien-Nan YEH

IPC: H01L33/50 ,  H01L25/075 ,  H01L33/62

Abstract: A package includes a substrate and a plurality of light-emitting chips. The substrate has a top surface. The light-emitting chips are disposed on the top surface of the substrate, in which a sum of the vertical projection areas of the light-emitting chips on the top surface of the substrate is less than 5% of an area of the top surface of the substrate.

公开(公告)号：US20170223793A1

公开(公告)日：2017-08-03

申请号：US15361481

申请日：2016-11-27

Applicant: Lextar Electronics Corporation

Inventor： Chien-Nan YEH ,  Chun-Jong CHANG ,  Po-Shen CHEN ,  Kai-Hsiang SHIH ,  Jhao-Cyuan HUANG ,  Ku-Cheng LIN

IPC: H05B33/08

CPC classification number: H05B33/0818 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0857

Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a first driving circuit, and a processing circuit. The rectifying circuit is configured to convert an AC voltage to a rectified voltage. The first driving circuit is configured to receive the rectified voltage to provide a first current so as to drive a first lighting module. The first driving circuit includes a first switch. The first switch turns ON or OFF selectively according to a first control voltage signal so as to control the first current. The processing circuit is configured to receive a dimming command, and adjust the first control voltage signal according to the dimming command. The first control voltage signal is configured to control a phase delay angle and a duty cycle of the first current.

公开(公告)号：US20170215244A1

公开(公告)日：2017-07-27

申请号：US15361076

申请日：2016-11-25

Applicant: Lextar Electronics Corporation

Inventor： Chien-Nan YEH ,  Chun-Jong CHANG ,  Po-Shen CHEN ,  Kai-Hsiang SHIH ,  Jhao-Cyuan HUANG ,  Ku-Cheng LIN

IPC: H05B33/08

CPC classification number: H05B33/0845 ,  H05B33/083 ,  H05B33/0857 ,  H05B33/086

Abstract: A dimming module and a solid state lighting device are shown. The dimming module includes a rectifying circuit, a phase control circuit, a processing circuit and a first driving circuit. The rectifying circuit is configured to convert an input AC voltage to a rectified voltage signal. The phase control circuit is configured to receive the rectified voltage signal and a dimming command, and output a control voltage signal correspondingly in which the phase control circuit controls a phase delay angle of the control voltage signal according to the dimming command. The processing circuit is configured to receive the control voltage signal and adjust a first driving voltage signal according to the phase delay angle. The first driving circuit is configured to receive the first driving voltage signal to drive a first lighting module.