公开(公告)号：US20240365448A1

公开(公告)日：2024-10-31

申请号：US18633423

申请日：2024-04-11

Applicant: Lextar Electronics Corporation

Inventor： Kai-Hsiang SHIH ,  Zheng-Shou TUNG ,  Chien-Nan YEH ,  Jin-Shing TSENG

IPC: H05B45/325 ,  H05B45/12

CPC classification number: H05B45/325 ,  H05B45/12

Abstract: A driving device includes a pulse intensity modulation module, a pulse width modulation module, a pulse density modulation module, and a driving module. The pulse intensity modulation module receives an image processing signal related to a pixel and generates a pulse intensity according to the image processing signal. The pulse width modulation module receives the image processing signal and generates a pulse width according to the image processing signal. The pulse density modulation module receives the image processing signal and generates a pulse density according to the image processing signal. The driving module receives the pulse intensity, the pulse width, and the pulse density and generates a driving signal to the pixel according to the pulse intensity, the pulse width, and the pulse density.

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：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.