公开(公告)号：US20210255534A1

公开(公告)日：2021-08-19

申请号：US17173025

申请日：2021-02-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Gregory S. PETTITT ,  John M. FERRI

IPC: G03B21/20 ,  G02B27/28 ,  G02B5/26

Abstract: A system includes a red light emitting diode (LED), a blue LED, and a green LED. The system also includes a red laser, a first filter, a second filter, and a lens. The system includes a first optical path that includes the red LED, the red laser, the first filter, the second filter, and the lens, where the first filter has a filter response to transmit red light from the red laser and to reflect red light from the red LED. The system also includes a second optical path that includes the blue LED, the green LED, the second filter, and the lens, where the second filter has a filter response to transmit blue light from the blue LED, to transmit green light from the green LED, to reflect red light from the red laser, and to reflect red light from the red LED.

公开(公告)号：US20190339515A1

公开(公告)日：2019-11-07

申请号：US16403027

申请日：2019-05-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Vivek Kumar THAKUR ,  John M. FERRI ,  Paul L. RANCURET

IPC: G02B27/00 ,  G02B27/28 ,  G02B27/14 ,  G02B27/12 ,  F21V8/00

Abstract: The pupil formed by an optical apparatus is expanded by use of a beam splitter to replicate the pupil and a waveguide to further replicate the replicated pupil. An optional rotator element can rotate a portion of the light split by the beam splitter to provide consistent polarization of light in the optical apparatus. In some embodiments, the beam splitter replication expands the pupil in one direction, while the waveguide replication expands the pupil in a second direction.