التفاصيل البيبلوغرافية
| العنوان: |
ILLUMINATION SYSTEM FOR USE IN A STEREOLITHOGRAPHY APPARATUS |
| Document Number: |
20120106150 |
| تاريخ النشر: |
May 3, 2012 |
| Appl. No: |
13/146858 |
| Application Filed: |
January 29, 2010 |
| مستخلص: |
An illumination system (30), comprising: a plurality of light-emitting diodes (LEDs) (34), each LED having at least a first, light-emitting surface (36) and a second surface (37), at least one of the first and the second surface being substantially flat; a plurality of electrical pathways (56), selectively connected to the respective LEDs, such that each LED can be individually controlled; and a levelling surface (46, 52), wherein the levelling surface is substantially flat and in levelling contact with the at least one substantially flat surface (37, 36) of each LED, such that a two-dimensional array of LEDs extends in a plane parallel to the levelling surface. |
| Inventors: |
Vaes, Mark Herman Else (Eindhoven, NL); Maalderink, Herman Hendrikus (Nuenen, NL); Vermeer, Adrianus Johannes Petrus Maria (Geldrop, NL); Jamar, Jacobus Hubertus Theodoor (Vessem, NL); Lommen, Antonius Hubertus Joannes Gerardus (Grubbenbvorst, NL); Rijfers, Andries (Kamerik, NL) |
| Assignees: |
Nederlandse Organisatie Voor toegepast- natuurwetenschappelijk onderzoek TNO (Delft, NL) |
| Claim: |
1-15. (canceled) |
| Claim: |
16. An illumination system, comprising: a plurality of light-emitting diodes (LEDs), each LED having at least a first, light-emitting surface and a second surface, at least one of the first and the second surface being substantially flat; a plurality of electrical pathways, selectively connected to the respective LEDs, such that each LED can be individually controlled; and a levelling surface, wherein the levelling surface is substantially flat and in levelling contact with the at least one substantially flat surface of each LED, such that a two-dimensional array of LEDs extends in a plane parallel to the levelling surface. |
| Claim: |
17. The illumination system according to claim 16, wherein the levelling surface has a surface flatness of at least 10 μm. |
| Claim: |
18. The illumination system according to claim 16, wherein the leveling surface has a surface flatness of at least 5 μm. |
| Claim: |
19. The illumination system according to claim 16, wherein the LEDs are bare dies; |
| Claim: |
20. The illumination system according to claim 16, wherein the at least one substantially flat surface of each LED is connected to the levelling surface by an adhesive. |
| Claim: |
21. The illumination system according to claim 20, wherein the adhesive comprises spacers, the spacers comprising spheres of glass or polystyrene. |
| Claim: |
22. The illumination system according to claim 16, wherein the levelling surface is provided by a substantially rigid support body. |
| Claim: |
23. The illumination system according to claim 22, wherein the support body comprises at least a first layer, the first layer comprising a material having a thermal conductivity of at least 150 W/mK and wherein the first layer provides the levelling surface. |
| Claim: |
24. The illumination system according to claim 23, wherein the support body further comprises a second layer, the second layer comprising a material having a linear thermal expansion coefficient of 5.10−6/K or less. |
| Claim: |
25. The illumination system according to claim 22, wherein both the LEDs and the electrical pathways are provided on the levelling surface, such that the electrical pathways extend at least partially between the LEDs. |
| Claim: |
26. The illumination system according to claim 23, wherein the electrical pathways are provided by means of thick film technology. |
| Claim: |
27. The illumination system according to claim 22, wherein a surface of the support body is provided with slots, defined by intermediate ribs, in which the electrical pathways are at least partially embedded in the slots and the LEDs are disposed on the intermediate ribs and wherein the intermediate ribs provide for the levelling surface. |
| Claim: |
28. The illumination system according to claim 27, wherein the electrical pathways are provided for in the form of printed circuit board. |
| Claim: |
29. The illumination system according to any of the claims 16, wherein the LEDs are of the flip-chip type, having substantially flat light-emitting surfaces and having their electrical connections on their respective second surfaces, and wherein a plano side of a multi-lens array provides for the levelling surface, such that the light-emitting surfaces of the LEDs are in levelling contact with the plano side of the multi-lens array. |
| Claim: |
30. The illumination system according to claim 29, wherein the electrical pathways, to which the LEDs are connected at their second surfaces, are at least partially provided for in the form of printed circuit board. |
| Claim: |
31. The illumination system according to claim 29, wherein the lenses of the multi-lens array are arranged in correspondence with the arrangement of the LEDs, such that the light-emitting surface of each LED is primarily associated with one lens of the multi-lens array. |
| Claim: |
32. Stereolithography apparatus comprising an illumination system according to claim 16. |
| Current U.S. Class: |
362/236 |
| Current International Class: |
21 |
| رقم الانضمام: |
edspap.20120106150 |
| قاعدة البيانات: |
USPTO Patent Applications |