SINGLE LASER MULTI-COLOR PROJECTION DISPLAY WITH QUANTUM DOT SCREEN

• US 20080172197A1
• Filed: 01/11/2007
• Published: 07/17/2008
• Est. Priority Date: 01/11/2007
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Skipor, Andrew F., Tarlton, Mark A., Jonnalagadda, Krishna D., Wielgus, Jerzy, Valliath, George T., Chason, Marc K., Hoffman, William F.
• Application Number:
  US11/622,190
• Publication Number:
  US 20080172197A1
• Time in Patent Office: Days
• US Class Current: 702/82
• CPC Class Codes: G02B 26/0833 the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD G02B26/0825 takes precedence; micromechanical devices in general B81B
• CPC Class Codes: G03B 21/10 Projectors with built-in or built-on screen
• CPC Class Codes: G03B 29/00 Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects combinations with flash apparatus G03B15/03
• CPC Class Codes: G09G 2360/145 the light originating from the display screen
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/02 by tracing or scanning a light beam on a screen
• CPC Class Codes: H04M 1/0214 Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0235 Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts
• CPC Class Codes: H04M 1/0266 for a display module assembly
• CPC Class Codes: H04M 1/0272 for a projector or beamer module assembly constructional features of projectors per se G03B21/00; constructional details of projectors using electronic spatial light modulators per se H04N9/31

Abstract

A display (1100) comprises a passive screen (106, 502, 700, 1114) printed with a pattern (404) of different color quantum dots (602, 604, 606) that is excited by scanning a laser (130, 1108) over the screen (106, 502, 700, 1114). The display (1100) can be incorporated into a handheld device (100, 1200) to improve the use-ability of the device (100, 1200).

Claims

1. A light emissive display screen comprising:

a substrate;

a multi-colored pattern of quantum dots on said substrate.

2. The light emissive display screen according to claim 1 wherein said quantum dots comprise a core and a shell.

3. The light emissive display screen according to claim 1 wherein said substrate is flexible.

4. The light emissive display screen according to claim 3 wherein said substrate comprises a material selected from the group consisting of:

paper, polyesters, polyimides, polyamides, polyamide-imides, polyetherimides, polyacrylates, polyethylene terephthalate, polyethylene, polypropylene, polyvinylidene chloride, and polysiloxanes.

5. The light emissive display according to claim 1 wherein said quantum dots are dispersed in a binder.

6. The light emissive display according to claim 5 wherein said binder comprises a photochemical resin.

7. A display comprising:

a screen comprising;

a substrate; and

a pattern of quantum dots on said substrate;

a laser adapted to produce a laser beam;

a beam scanner optically coupled to said laser, wherein said beam scanner is adapted to scan said laser beam over said screen;

laser drive electronics drivingly coupled to said laser, wherein said laser drive electronics are adapted to modulate said laser according to image information.

8. The display according to claim 7 wherein said screen is scrollable.

9. The display according to claim 7 wherein said screen is foldable.

10. The display according to claim 7 wherein said screen is rollable.

11. The display according to claim 7 wherein:

said quantum dots are functionalized with molecules.

12. The display according to claim 7 wherein:

said quantum dots comprise;

a core; and

a shell.

13. The display according to claim 12 wherein said quantum dots are made out of one or more materials selected from the group consisting of:

CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb, ZnO, ZnS, ZnSe, ZnTe, CdO, CdS, CdSe, CdTe, MgS, MgSe, GaAs, GaN, GaP, GaAs, GaSb, HgO, HgS, HgSe, HgTe, InAs, InN, InP, InSb, AlAs, AlN, AlP, AlSb, ZnSeTe, ZnCdS, ZnCdSe, CdSeS ZnSe doped with Mn and ZnSe doped with Cu.

14. A method of aligning an excitation laser beam with a multi-colored pattern of quantum dots, the method comprising:

raster scanning said excitation laser beam over said multi-colored pattern of quantum dots;

sensing light emitted by said multi-colored pattern of quantum dots with a light sensor in order to obtain a light reading;

adjusting at least one signal used to synchronize said raster scanning with said multi-colored pattern of quantum dots based on said light reading.

15. The method according to claim 14 further comprising:

modulating said excitation laser to illuminate only one color of said multi-colored pattern of quantum dots;

filtering light sensed by said sensor with a filter that passes light emitted by said only one color of said multi-colored pattern of quantum dots; and

wherein adjusting said at least one signal comprises adjusting said at least one signal in order to maximize said light reading.

16. The method according to claim 14 further comprising:

scanning said excitation laser beam over an angular range,

counting a number of pulses of light sensed by said sensor; and

wherein adjusting said at least one signal comprises scaling said at least one signal.

17. A portable device comprising:

a screen comprising;

a flexible substrate; and

a pattern of quantum dots printed on said substrate;

a laser adapted to produce a laser beam;

a beam scanner optically coupled to said laser, wherein said beam scanner is adapted to scan said laser beam over said screen;

laser drive electronics drivingly coupled to said laser, wherein said laser drive electronics are adapted to modulate said laser according to image information.

18. The portable device according to claim 17 further comprising an axel wherein said screen is attached to said axel such that said screen can be rolled on said axel and unrolled from said axel.

19. A portable device comprising:

a housing;

a first support arm that is coupled to said housing and extendable from said housing, said first support arm comprising a first distal end;

an axel;

a projection screen that is rolled on said axel and unrollable from said axel, wherein, in an unrolled state said screen extends between said housing and said first distal end of said first support arm;

a laser for scanning a laser beam over said projection screen.

20. The portable device according to claim 19 wherein said axel is coupled to said first distal end of said first support arm.

21. The portable device according claim 19 wherein said axel is disposed within said housing.

22. The portable device according to claim 19 comprising a second support arm that is coupled to said housing and extendable from said housing, second support arm comprising a second distal end;

and

wherein in said unrolled state said projection screen extends between said housing and said second distal end of said second support arm.