Digital display system and method

Patent metadata

Field	Value
Publication number	US-12574481-B2
Application number	US-202318448205-A
Country	US
Kind code	B2
Filing date	Aug 11, 2023
Priority date	Nov 1, 2019
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A system includes a color filter including a first segment configured to transmit first light having a first color and to reflect second light having a second color and a second segment configured to transmit the second light having the second color and to reflect the first light having the first color. The system also includes an integrator rod optically coupled to the color filter, a reflective surface having an aperture on an end of the integrator rod.

First claim

What is claimed is:

1 . A system comprising:
a color filter comprising:
a first segment configured to transmit first light having a first color and to reflect second light having a second color; and
a second segment configured to transmit the second light having the second color and to reflect the first light having the first color; and
an integrator rod optically coupled to the color filter, the integrator rod including a first end and a second end that is closer to the color filter than the first end, the integrator rod including a reflective surface at the first end, the reflective surface having an aperture.

2 . The system of claim 1 , wherein the second end is disposed facing the color filter.

3 . The system of claim 1 , wherein the aperture is round.

4 . The system of claim 1 , further comprising a phosphor wheel optically coupled to the integrator rod, the phosphor wheel having a first side and a second side.

5 . The system of claim 4 , further comprising:
a dichroic mirror having a first side and a second side, the second side of the dichroic mirror optically coupled to the integrator rod and the first side of the dichroic mirror optically coupled to the first side of the phosphor wheel; a light source optically coupled to the first side of the dichroic mirror; and a series of mirrors optically coupling the second side of the phosphor wheel to the second side of the dichroic mirror.

6 . A system comprising:
a light source configured to produce first light having a first color and second light having a second color; a color filter optically coupled to the light source, the color filter having:
a first segment configured to transmit the first light having the first color and to reflect the second light having the second color to produce first reflected light; and
a second segment configured to transmit the second light having the second color and to reflect the first light having the first color to produce second reflected light; and
an integrator rod optically coupled between the light source and the color filter, the integrator rod configured to:
transmit the first light towards the color filter;
transmit the second light towards the color filter;
reflect the first reflected light to direct the first reflected light towards the color filter; and
reflect the second reflected light to direct the second reflected light towards the color filter;
wherein the color filter is one of an involute color filter and an Archimedean color filter.

7 . The system of claim 6 , wherein the first segment and the second segment are configured to transmit third light having a third color.

8 . The system of claim 6 , wherein the color filter comprises a third segment configured to transmit third light having a third color and to reflect the first light having the first color and the second light having the second color, wherein the first segment is configured to reflect the third light having the third color and the second segment is configured to reflect the third light having the third color.

9 . The system of claim 6 , wherein the color filter is the involute color filter.

10 . The system of claim 6 , wherein the color filter is the Archimedean color filter.

11 . The system of claim 6 , wherein the color filter is a static checkerboard color filter or static striped color filter.

12 . The system of claim 6 , further comprising a spatial light modulator (SLM) optically coupled to the color filter.

13 . The system of claim 12 , further comprising an actuator optically coupled to the spatial light modulator.

14 . The system of claim 6 , wherein the light source comprises a phosphor wheel optically coupled to the integrator rod.

15 . A system comprising:
a color filter comprising:
a first segment configured to transmit first light having a first color and to reflect second light having a second color; and
a second segment configured to transmit the second light having the second color and to reflect the first light having the first color;
an integrator rod optically coupled to the color filter, the integrator rod including a reflective surface on an end of the integrator rod, the reflective surface having an aperature; a spatial light modulator (SLM) optically coupled to the color filter; and a phosphor wheel optically coupled to the integrator rod.

16 . The system of claim 15 , wherein the end of the integrator rod is a first end, the integrator rod having a second end facing the color filter.

17 . The system of claim 15 , wherein the aperture is round.

18 . The system of claim 15 , further comprising an actuator optically coupled to the spatial light modulator.

19 . The system of claim 15 , further comprising:
a dichroic mirror having a first side and a second side, the second side of the dichroic mirror optically coupled to the integrator rod and the first side of the dichroic mirror optically coupled to the first side of the phosphor wheel; a light source optically coupled to the first side of the dichroic mirror; and a series of mirrors optically coupling the second side of the phosphor wheel to the second side of the dichroic mirror.

20 . The system of claim 1 , wherein the reflective surface is one of a reflective internal surface of the integrator rod and a coated external surface of the integrator rod.

Assignees

• Texas Instruments Inc

Inventors

• Oberascher Kristofer Scott
• Pettitt Gregory Scott
• Kempf Jeffrey Matthew
• Davis Michael Terry
• Zhou Xi

Classifications

• H04N9/3158 Primary

  for controlling the spectrum · CPC title

• G03B21/2066

  Reflectors in illumination beam (in projection beam G03B21/28) · CPC title

• G03B33/08

  Sequential recording or projection (G03B33/02, G03B33/04, G03B33/06 take precedence) · CPC title

• G03B21/204

  using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197) · CPC title

• H04N9/3188

  Scale or resolution adjustment (scaling in general G06T3/40; resolution modifying circuits for displays in general G09G5/391) · CPC title