Light source and display system

Patent metadata

Field	Value
Publication number	US-10585293-B2
Application number	US-201214352532-A
Country	US
Kind code	B2
Filing date	Aug 13, 2012
Priority date	Oct 17, 2011
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

Disclosed are a light source and a display system. The light source comprises at least one original light emitting device group (1) and at least one supplementary light emitting device group (2). The original light emitting device group (1) comprises at least two LED (11, 12, 13) and a wavelength light combining device (14, 15), wherein the energy of the overlapped spectrum in the normalized spectrum of the two LED is smaller than 50% of the smaller energy of the two, and the wavelength light combining device combines the light output from all the LED in the original light emitting device group (1) in a wavelength light combining way. The supplementary light emitting device group (2) comprises at least one LED (21). The energy of the overlapped spectrum in the normalized spectrum of any LED of the supplementary light emitting device group (2) and at least one LED of the original light emitting device group (1) is larger than or equal to 10% of the smaller energy of the two. The light source also comprises a geometric light combining device (31), which combines the light finally output from the original light emitting device group (1) and the light finally output from the supplementary light emitting device group (2) into one beam of light in a geometric light combining way.

First claim

What is claimed is:

1. A light source, comprising at least one original light emitting device group and at least one supplementary light emitting device group,
wherein the original light emitting device group comprises at least a red solid state lighting device, a green solid state lighting device and a blue solid state lighting device and a wavelength-based light combining device, wherein the wavelength-based light combining device combines light output from all the solid state lighting devices in the original light emitting device group using wavelength-based light combination into one combined light beam, the one combined light beam simultaneously containing red, green and blue lights, each of which being unmodulated in a time-domain by any spatial light modulator;
wherein the supplementary light emitting device group comprises at least an amber solid state lighting device, a cyan solid state lighting device, and a royal blue solid state lighting device and another wavelength-based light combining device, wherein the other wavelength-based light combining device combines light output from all the solid state lighting devices in the supplementary light emitting device group using wavelength-based light combination into another combined light beam, the other combined light beam simultaneously containing amber, cyan and royal blue lights, each of which being unmodulated in the time-domain by any spatial light modulator, wherein the other wavelength-based light combining device is disposed outside of an optical path of the light emitted by the solid state lighting devices of the original light emitting device group; and
wherein the light source further comprising a geometric-based light combining device, which combines the one combined light beam output from the original light emitting device group and the other combined light beam output from the supplementary light emitting device group into one beam of light using geometric-based light combination.

2. The light source of claim 1 , wherein the one combined light beam output from the supplementary light emitting device group surrounds the other combined light beam output from the original light emitting device group, and the one combined light beam and the other combined light beam are combined into one beam of light using geometric-based light combination.

3. The light source of claim 1 , wherein the geometric-based light combining device comprises two lenses and a reflector, wherein the one combined light beam output from the original light emitting device group are incident on one of the lenses, and the other combined light beam output from the supplementary light emitting device group are incident on another one of the lenses and reflected by the reflector, so that the one combined light beam output from the original light emitting device group and the other combined light beam output from the supplementary light emitting device group are geometrically combined.

4. The light source of claim 1 , wherein the one combined light beam output from the original light emitting device group and the other combined light beam output from the supplementary light emitting device group are geometrically combined on a same cross section of the geometric-based light combining device.

5. The light source of claim 4 , wherein the supplementary light emitting device group is located on the left side or right side of the original light emitting device group.

6. A light source, comprising at least one original light emitting device group and at least one supplementary light emitting device group,
wherein the original light emitting device group comprises at least a red solid state lighting device, a green solid state lighting device and a blue solid state lighting device and a wavelength-based light combining device, wherein the wavelength-based light combining device combines light output from all the solid state lighting devices in the original light emitting device group using wavelength-based light combination into one combined light beam, the one combined light beam simultaneously containing red, green and blue lights, each of which being unmodulated in a time-domain by any spatial light modulator;
wherein the supplementary light emitting device group comprises at least an amber solid state lighting device, a cyan solid state lighting device, and a royal blue solid state lighting device and another wavelength-based light combining device, wherein the other wavelength-based light combining device combines light output from all the solid state lighting devices in the supplementary light emitting device group using wavelength-based light combination into another combined light beam, the other combined light beam simultaneously containing amber, cyan and royal blue lights, each of which being unmodulated in the time-domain by any spatial light modulator;
wherein the light source further comprising a geometric-based light combining device, which combines the one combined light beam output from the original light emitting device group and the other combined light beam output from the supplementary light emitting device group into one beam of light using geometric-based light combination;
wherein the original light emitting device group comprises multiple groups, and the supplementary light emitting device group comprises multiple groups;
wherein lights output from at least one of the multiple original light emitting device groups and at least one of the multiple supplementary light emitting device groups are geometrically combined on different cross sections of the geometric-based light combining device, and lights output from the at least one of the multiple original light emitting device groups and at least another one of the multiple supplementary light emitting device groups are geometrically combined on a same cross section of the geometric-based light combining device.

7. The light source of claim 6 , wherein a number of the original light emitting device groups is even, and a number of the supplementary light emitting device group is even; wherein the light beams from the original light emitting device groups are one-to-one symmetric with respect to an origin on a cross section of the geometric-based light combining device, and the light beams from the original light emitting device groups are one-to-one symmetric with respect to an origin on a cross section of the geometric-based light combining device.

8. The light source of claim 6 , wherein two solid state lighting devices of any same color in at least two original light emitting device groups are symmetric with respect to an origin on a joining plane parallel to the geometric-based light combining device; and two solid state lighting devices of any same color in the supplementary light emitting device group are symmetric with respect to an origin on the joining plane.

9. A light source, comprising at least one original light emitting device group and at least one supplementary light emitting device group,
wherein the original light emitting device group comprises at least a red solid state lighting device, a green solid state lighting device and a blue solid state lighting device and a wavelength-based light combining device, wherein the wavelength-based light combining device combines light output from all the solid state lighting devices in the original light emitting device group using wavelength-based light combination into one combined light beam, the one combined light beam simultaneously containing red, green and blue lights, each of which being unmodulated in a time-domain by any spatial light modulator;
wherein the supplementary light emitting device group comprises at least an amber solid state lighting device, a cyan solid state lighting device,

Assignees

• Yang Yi
• Hu Fei
• Appotronics Corp Ltd

Inventors

• Yang Yi
• Hu Fei

Classifications

• G02B27/0994

  Fibers, light pipes (optical fibers per se G02B6/02) · CPC title

• G02B27/102 Primary

  for generating a colour image from monochromatic image signal sources · CPC title

• G02B27/141 Primary

  using dichroic mirrors · CPC title

• G02B27/145

  having sequential partially reflecting surfaces · CPC title

• F21V9/20

  Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others · CPC title