公开(公告)号：US11350499B2

公开(公告)日：2022-05-31

申请号：US17192951

申请日：2021-03-05

Applicant: Alcon Inc.

Inventor： David Jung ,  Jason L. Lee

IPC: H05B45/34 ,  H05B45/36 ,  H05B47/19 ,  H05B45/345 ,  H05B45/325 ,  A61F9/007

Abstract: Systems and methods are disclosed for controlled illumination of LEDs. An example system comprises: a plurality of LEDs; an LED controller; a current buffer adapted to receive an input bias level signal from the LED controller, wherein a set of LEDs to be controlled together are connected in parallel with each other in a circuit with the current buffer; and at least one current limiting resistor connected in the circuit with the plurality of LEDs and the current buffer. The systems and methods are adapted to control the illumination of the LEDs by applying a constant voltage to the circuit based upon the input bias level signal, thereby controlling the illumination of the light-emitting diodes without the use of pulse width modulation. Crosstalk interference with RFID components due to pulse width modulation is thereby avoided.

公开(公告)号：US20230027299A1

公开(公告)日：2023-01-26

申请号：US17807770

申请日：2022-06-20

Applicant: Alcon Inc.

Inventor： Jing Xu ,  Jason L. Lee ,  Hari Krishna Kapparapu ,  Dean Richardson

IPC: H05B47/105 ,  H05B45/10 ,  H05B45/20 ,  A61B90/30

Abstract: Embodiments of the present disclosure generally relate to systems and methods for calibrating light-emitting diode (LED) light engines. The systems and methods described herein include characterizing the performance of a red-green-blue (RGB) LED light engine so as to enable the display of calibrated, dimensionless output values that accurately reflect a perceived brightness of illumination generated by the light engine for a specific output color.

公开(公告)号：US11800620B2

公开(公告)日：2023-10-24

申请号：US17807770

申请日：2022-06-20

Applicant: Alcon Inc.

Inventor： Jing Xu ,  Jason L. Lee ,  Hari Krishna Kapparapu ,  Dean Richardson

IPC: H05B47/105 ,  A61B90/30 ,  H05B45/20 ,  H05B45/10 ,  A61B17/00 ,  A61F9/007

CPC classification number: H05B47/105 ,  A61B90/30 ,  H05B45/10 ,  H05B45/20 ,  A61B2017/00199 ,  A61B2017/00725 ,  A61F9/007

Abstract: Embodiments of the present disclosure generally relate to systems and methods for calibrating light-emitting diode (LED) light engines. The systems and methods described herein include characterizing the performance of a red-green-blue (RGB) LED light engine so as to enable the display of calibrated, dimensionless output values that accurately reflect a perceived brightness of illumination generated by the light engine for a specific output color.

公开(公告)号：US20210289600A1

公开(公告)日：2021-09-16

申请号：US17192951

申请日：2021-03-05

Applicant: Alcon Inc.

Inventor： David Jung ,  Jason L. Lee

IPC: H05B45/34 ,  A61F9/007 ,  H05B45/325 ,  H05B45/345 ,  H05B45/36 ,  H05B47/19

Abstract: Systems and methods are disclosed for controlled illumination of LEDs. An example system comprises: a plurality of LEDs; an LED controller; a current buffer adapted to receive an input bias level signal from the LED controller, wherein a set of LEDs to be controlled together are connected in parallel with each other in a circuit with the current buffer; and at least one current limiting resistor connected in the circuit with the plurality of LEDs and the current buffer. The systems and methods are adapted to control the illumination of the LEDs by applying a constant voltage to the circuit based upon the input bias level signal, thereby controlling the illumination of the light-emitting diodes without the use of pulse width modulation. Crosstalk interference with RFID components due to pulse width modulation is thereby avoided.