PROJECTION SYSTEM

• US 20130235280A1
• Filed: 12/01/2010
• Published: 09/12/2013
• Est. Priority Date: 12/01/2010
• Status: Active Grant

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Lemoptix Sa (Intel Corporation)
• Inventors: Abele, Nicolas, Gamet, Julien
• Granted Patent: US 9,671,683 B2
• Time in Patent Office: Days
• US Class Current: 348/744
• CPC Class Codes: G03B 21/26 Projecting separately subsidiary matter simultaneously with main image
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• CPC Class Codes: H04N 9/31 Projection devices for colour picture display , e.g. using electronic spatial light modulators [ESLM]
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026

Abstract

A projection apparatus, comprising one or more light sources, wherein the one or more light sources are arranged to collectively provide a light signal which comprises multiple wavelengths, wherein the projection apparatus further comprises an optical filter configured to filter the light signal provided by the one or more light sources, so that two or more images may be projected simultaneously by the projection apparatus, each image being projected to a different position. There is further provided a scanning device which uses the afore-mentioned projection apparatus.

Claims

1. A projection apparatus, comprising one or more light sources, wherein the one or more light sources are arranged to collectively provide a light signal which comprises multiple wavelengths, wherein the projection apparatus further comprises an optical filter configured to filter the light signal provided by the one or more light sources, so that two or more images can be projected simultaneously by the projection apparatus, each image being projectable to a different position, wherein the optical filter is configured to filter a component of the light signal which has a wavelength outside of the LCD wavelength range or outside the LED wavelength range.

2. A projection apparatus according to claim 1, wherein, the light signal comprises two or more light components, wherein each of the two or more light components define one or more pixels of independent images.

3. A projection apparatus according to claim 2, wherein, each of the one or more light components comprise different wavelengths or different ranges of wavelengths.

4. A projection apparatus according to claim 1, wherein, the light signal comprises, a first light component which has a first wavelength or a first range of wavelengths, wherein the first light component defines one or more pixels of a first image, and a second light component light which has a second wavelength or a second range or wavelengths, wherein the second light component defines one or more pixels of a second image.

5. A projection apparatus according to claim 4, wherein, the optical filter is configured to filter light which has a wavelength or wavelength range corresponding to the wavelength or wavelength range of the first or second light component.

6. A projection apparatus according to claim 1, wherein, the optical filter is configured to deflect light which has a selected wavelength or selected wavelength range.

7. A projection apparatus according to claim 1, wherein, the optical filter is a dynamic optical filter.

8. A projection apparatus according to claim 1, wherein, the one or more light sources are arranged to collectively provide a single light signal which comprises multiple wavelengths.

9. A projection apparatus according to claim 1, wherein, the projection apparatus comprises a single light source.

10. A projection apparatus according to claim 1, wherein, a component of the light signal which passes through the optical filter is usable to project a first image onto a display screen and a component of the light signal which is filtered from the light signal by the optical filter is usable to project a second image onto a display screen.

11. A projection apparatus according to claim 1, wherein, the two or more images comprise one or more virtual devices.

12. A projection apparatus according to claim 1, further comprising a sensor which is operable to sense touching of the at least one of the two or more images.

15. A scanning device, comprising:

a means for scanning a product identification code;

a projection apparatus according to claim 1.

13. A method of projecting an image onto one or more display surfaces comprising the steps of:

providing a light signal which comprises multiple wavelengths,

filtering one or more light components from the light signal using an optical filter, wherein the optical filter is configured to filter a component of the light signal which has a wavelength outside of the LCD wavelength range or outside the LED wavelength range;

displaying a first image on a display surface using a light component which passes through the optical filter; and

displaying a second image on a display surface using a light component which was filtered from the light signal using the optical filter.

14. A method according to claim 13, comprising the step of, displaying a first image on a first display surface using a light component which passes through the optical filter and displaying a second image on a second display surface using a light component which does was filtered from the light signal using the optical filter.