Digital display system and method

Patent metadata

Field	Value
Publication number	US-2021136333-A1
Application number	US-202017085483-A
Country	US
Kind code	A1
Filing date	Oct 30, 2020
Priority date	Nov 1, 2019
Publication date	May 6, 2021
Grant date	—

Abstract

A system having a color filter having first and second segments. The first and second segments allow respective first and second wavelengths to pass through to a spatial light modulator. The first and second segments also reflect second and first wavelengths, respectively. The reflected first and second wavelengths are recycled and directed towards the color filter.

First claim

What is claimed is:

1 . A system, comprising:
a color filter comprising:
a first segment configured to transmit a first wavelength and to reflect a second wavelength, and
a second segment configured to transmit the second wavelength and to reflect the first wavelength,
wherein the first and second segments are further configured to transmit a third wavelength; and
a light-propagating device disposed between an illumination source and the color filter, the light-propagating device configured to transmit recycled light from the reflected first and second wavelengths as recycled light to the color filter.

2 . The system of claim 1 , further comprising a phosphor wheel configured to reflect wavelengths towards the color filter.

3 . The system of claim 2 , wherein the phosphor wheel is configured to recycle the first and second reflected wavelengths.

4 . The system of claim 1 , wherein the light-propagating device is a recycling integrator rod configured to recycle the first and second reflected wavelengths.

5 . The system of claim 1 , further comprising a spatial light modulator configured to receive the first, second, and third wavelengths of light.

6 . The system of claim 1 , further comprising a second illumination source.

7 . The system of claim 1 , wherein the first, second, and third wavelengths are red, green, and blue.

8 . The system of claim 1 , wherein the color filter further comprises a third segment capable of transmitting the third wavelength and a fourth wavelength.

9 . The system of claim 8 , wherein the first wavelength is fourth wavelength is yellow.

10 . A digital display system comprising:
a phosphor member configured to produce light having a first wavelength, a second wavelength, and a third wavelength; a color filter configured to receive the light from the phosphor member, the color filter having:
a first segment configured to transmit the light having the first wavelength and reflect the light having the second wavelength towards the phosphor member,
a second segment configured to transmit the light having the second wavelength and reflect the light having the first wavelength towards the phosphor member,
wherein the phosphor member is configured to reflect the reflected light having the first color towards the color filter and to reflect the reflected light having the second color towards the color filter.

11 . The digital display system of claim 10 , wherein the color filter has an involute color structure.

12 . The digital display system of claim 10 , wherein the color filter is a static color filter.

13 . The digital display system of claim 12 , wherein the static color filter has the first and second segments alternating in a checkerboard pattern.

14 . The digital display system of claim 10 , further comprising a illumination source configured to emit wavelengths of light directed towards the phosphor member.

15 . The system of claim 12 wherein the phosphor member is a static phosphor component.

16 . A method comprising:
receiving, by a phosphor member, blue light; converting, by the phosphor member, at least a portion of the blue light to yellow light, the yellow light comprising red light and green light; reflecting, by the phosphor member, at least a portion of the blue light. directing at least a portion of the blue light to a color filter; directing at least a portion of the yellow light to the color filter; transmitting the red light and the blue light through a first segment of the color filter; transmitting the green light and the blue light through a second segment of the color filter; reflecting the green light from the first segment of the color filter; reflecting the red light from the second segment of the color filter; recycling the reflected green and red light as reflected light by reflection; directing the reflected light towards the color filter; and transmitting part of the recycled reflected light through the first and second segments of the color filter.

17 . The method of claim 16 , wherein the step of recycling the light is performed by an integrator rod.

18 . The method of claim 16 further comprising transmitting yellow and blue light through a third segment of the color filter.

19 . The method of claim 18 , wherein the red, green, blue, and yellow light are transmitted to a display simultaneously.

Assignees

• Texas Instruments Inc

Inventors

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

Classifications

• G03B33/08

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

• G03B21/2066

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

• H04N9/3117 Primary

  by using a sequential colour filter producing two or more colours simultaneously, e.g. by creating scrolling colour bands · CPC title

• H04N9/3188

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