# US 7,270,428 B2 · 2D/3D data projector

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- Number: US 7,270,428 B2
- Document ID: US7270428B2
- Status: Granted
- Kind: B2
- Application number: 11/407,829
- Filed: 2006-04-18
- Published: 2006-09-28
- Granted: 2007-09-18
- Earliest claimed: 2003-04-16
- Assignees: Upstream Engineering Oy
- Inventors: Mikko Petteri Alasaarela; Ilkka Antero Alasaarela
- Web page: https://patentgrep.com/patent/US7270428B2

## CPC

- G02B 27/102: {for generating a colour image from monochromatic image signal sources}
- G02B 27/1066: {for enhancing image performance, like resolution, pixel numbers, dual magnifications or dynamic range, by tiling, slicing or overlapping fields of view}
- G02B 27/145: {having sequential partially reflecting surfaces}
- G02B 27/149: {using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes}
- G02B 27/285: {comprising arrays of elements, e.g. microprisms}
- H04N 9/315: {Modulator illumination systems (general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20)}
- H10H 20/856: Reflecting means
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

The present solution relates to a 2D/3D data projector, which comprises: A data projector, the data projector comprising: at least one micro display having an image to be projected, at least one source unit comprising at least one light source chip and at least one beam forming component, each beam forming component comprising at least one diffractive element, and each source unit being designed to preserve etendue as far as possible, to minimize photon loss, to provide a desired projection shape and a uniform illumination onto the micro display, and a focusing optical unit for projecting the image of the micro display on a target.

## Claims

### Claim 1

A beam forming component disposed in a three dimensional configuration to substantially enclose a hemisphere about a light source, where at least one surface of the beam forming component facing a sidewall of the hemisphere comprises a mirrored surface having non-transmissive micro optical structures.

### Claim 2 (depends on 1)

The beam forming component of claim 1, further comprising a micro display disposed adjacent to an optically transmissive surface of the beam forming component.

### Claim 3 (depends on 2)

The beam forming component of claim 2, wherein the beam forming component is configured to provide substantially uniform illumination to the micro display.

### Claim 4 (depends on 1)

The beam forming component of claim 1, wherein an optically transmissive surface of the beam forming component that encloses the hemisphere, comprises micro optical structures.

### Claim 5 (depends on 1)

The beam forming component of claim 1, in combination with a reflective substrate that together substantially envelopes the light source.

### Claim 6 (depends on 1)

The beam forming component of claim 1, wherein the light source comprises a light source chip and the beam forming component comprises a transparent material adjacent to the light source chip that has an index of refraction matched to that of the light source.

### Claim 7 (depends on 6)

The beam forming component of claim 6, wherein the matched indices of refraction are within about 0.9 of one another.

### Claim 8 (depends on 1)

The beam forming component of claim 1 in combination with a micro display, said beam forming component disposed to provide a substantially uniform illumination onto the micro display.

### Claim 9 (depends on 8)

The beam forming component of claim 8 disposed to provide a desired projection shape onto the micro display.

### Claim 10 (depends on 1)

The beam forming component of claim 1, wherein the micro-optical structures comprise a diffractive grating.

### Claim 11 (depends on 1)

The beam forming component of claim 1, wherein the micro-optical structures comprise a refractive grating.

### Claim 12 (depends on 1)

The beam forming component of claim 1 wherein the at least one surface comprises a plurality of optically reflective surfaces that form sidewalls about the hemisphere, said plurality of optically reflective surfaces disposed to surround the light source, each of said surfaces comprising micro-optical structures.

### Claim 13 (depends on 12)

The beam forming component of claim 12 further comprising a transparent material adjacent to the light source and defining an upper surface that, together with the plurality of surfaces, fully encloses the hemisphere about the light source, wherein said upper surface comprises at least one diffractive component.

### Claim 14 (depends on 12)

The beam forming component of claim 12 further comprising a transparent material adjacent to the light source and defining an upper surface that, together with the plurality of surfaces, fully encloses the hemisphere about the light source, wherein said upper surface further comprises at least one refractive component.

### Claim 15 (depends on 13)

The beam forming component of claim 13 wherein the upper surface is planar.

### Claim 16 (depends on 13)

The beam forming component of claim 13 wherein the upper surface is arcuate.

### Claim 17 (depends on 12)

The beam forming component of claim 12, wherein each of the plurality of surfaces are planar.

### Claim 18 (depends on 12)

The beam forming component of claim 12, wherein each of the plurality of surfaces are arcuate.

### Claim 19 (depends on 18)

The beam forming component of claim 18, wherein at least some of the arcuate surfaces are parabolic.