Inorganic bonded devices and structures
An inorganic coating may be applied to bond optically scattering particles or components. Optically scattering particles bonded via the inorganic coating may form a three dimensional film which can receive a light emission, convert, and emit the light emission with one or more changed properties. The inorganic coating may be deposited using a low-pressure deposition technique such as an atomic layer deposition (ALD) technique. Two or more components, such as an LED and a ceramic phosphor layer may be bonded together by depositing an inorganic coating using the ALD technique.
1. An array of light emitting structures, comprising:
light emitting structures disposed in a matrix, each of the light emitting structures being individually addressable and comprising:
a three-dimensional film each comprising luminescent particles and an inorganic coating disposed on the luminescent particles to bond the luminescent particles to each other, the luminescent particles configured to absorb light of a first wavelength and in response emit light of a second wavelength; and
a light emitting device configured to emit light, the three-dimensional film arranged in a path of the light emitted by the light emitting device.
2. The array as claimed in claim 1 , wherein the light emitting device is a laser or electron beam.
3. The array as claimed in claim 1 , wherein the light emitting structures are separated from each other by a separation material that is reflective or absorptive.
4. The array as claimed in claim 1 , wherein the light emitting device is spaced apart from the three-dimensional film by 0.1 to 100 mm.
5. A lighting system, comprising:
an array of light emitting structures comprising light emitting structures arranged in a matrix, each of the light emitting structures comprising:
a three-dimensional film each comprising particles and an inorganic coating disposed on the particles to bond the particles to each other; and
a light emitting device configured to emit light, the three-dimensional film arranged in a path of the light emitted by the light emitting device; and
a secondary optic disposed in a light path of the array of light emitting structures.
6. The lighting system of claim 5 , wherein the secondary optic is a dichroic filter.
7. The lighting system of claim 5 , wherein the secondary optic is reflective.
8. The lighting system of claim 7 , wherein the secondary optic is a distributed Bragg reflector.
9. The lighting system of claim 5 , wherein the lighting system is at least part of a system of one of an automotive headlight, a camera flash, and a display.
10. The lighting system of claim 5 , wherein the array of light emitting structures comprises 1000 to 10000 of the light emitting structures.
11. The lighting system of claim 5 , wherein the light emitting device is a laser.
12. The lighting system of claim 5 , wherein the secondary optic is one of a microelectromechanical system (MEMS) based mirror and an acousto-optic reflector or deflector.
13. The lighting system of claim 5 , wherein the light emitting device is configured to emit infrared light.
14. A wavelength converting device, comprising:
a component comprising a gap;
a film disposed on the component to bridge the gap and comprising particles, the particles, the film being porous and comprising an inorganic coating disposed on the particles to bond the particles to each other and the component; and
wherein a coefficient of thermal expansion of the inorganic coating is substantially matched to a coefficient of thermal expansion of the particles.
15. The wavelength converting device of claim 14 , wherein the component comprises pyrolytic graphite.
16. The wavelength converting device of claim 14 , wherein the component comprises a silicon wafer.
17. The wavelength converting device of claim 14 , wherein the particles are quantum dots.
18. The wavelength converting device of claim 14 , wherein the particles have an average size from 0.5 to 40 microns.
19. The wavelength converting device of claim 14 , wherein the inorganic coating comprises one of Al 2 O 3 , SiO 2 , Ta 2 O 5 , ZrO 2 , TiO 2 , and HfO 2 .