Lighting unit

• US 20050111211A1
• Filed: 11/22/2004
• Published: 05/26/2005
• Est. Priority Date: 11/24/2003
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Inventors: Takeuchi, Norihito
• Application Number:
  US10/995,787
• Publication Number:
  US 20050111211A1
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: G02F 1/13336 Combining plural substrates to produce large-area displays, e.g. tiled displays
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: H10K 50/854 comprising scattering means
• CPC Class Codes: H10K 59/18 Tiled displays
• CPC Class Codes: H10K 59/86 Series electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 59/877 comprising scattering means

Abstract

A lighting unit includes a plurality of panels and a light scattering means. The panels are arranged adjacently. Each panel has a transparent substrate and an electroluminescent element that is provided on the transparent substrate. Each panel also has end faces. The adjacent panels are arranged so that the end faces thereof face each other. The light scattering means is interposed between at least the end faces of the adjacent panels.

Claims

1. A lighting unit comprising:

a plurality of panels arranged adjacently, each panel having a transparent substrate and an electroluminescent element that is provided on the transparent substrate, each panel also having end faces, the adjacent panels being arranged so that the end faces thereof face each other; and

a light scattering means interposed between at least the end faces of the adjacent panels.

2. The lighting unit according to claim 1, further comprising an adhesive means through which the transparent substrates of the adjacent panels are joined to each other, the adhesive means functioning as the light scattering means at least when the adhesive means is solidified.

3. The lighting unit according to claim 1, wherein the light scattering means is made of a gel or substantially made of the gel.

4. The lighting unit according to claim 1, further comprising a scattering member provided on a side of a light exit surface of the transparent substrate and/or uneven portions formed on the light exit surface.

5. The lighting unit according to claim 1, wherein a plurality of the electroluminescent elements are electrically connected in series.

6. The lighting unit according to claim 1, wherein each electroluminescent element emits white light.

7. A lighting unit comprising:

a plurality of panels arranged adjacently, each panel having a transparent substrate, which has on opposite sides thereof a light exit surface and a light incidence surface, each panel also having an electroluminescent element that is provided on the light incidence surface of the transparent substrate, each panel further having end faces, wherein the light exit surfaces or the light incidence surfaces are positioned roughly in an identical plane, each electroluminescent element being located so as to exist on the same side relative to the plane; and

a light scattering structure provided on the end face of each transparent substrate, thereby extracting the light that is emitted from the electroluminescent element from a side of the light exit surface to an outside of the lighting unit.

8. The lighting unit according to claim 7, further comprising a light scattering means provided between the transparent substrates of the panels adjacent to each other.

9. The lighting unit according to claim 7, further comprising a scattering member provided on a side of the light exit surface of the transparent substrate and/or uneven portions formed on the light exit surface.

10. The lighting unit according to claim 7, wherein a plurality of the electroluminescent elements are electrically connected in series.

11. The lighting unit according to claim 7, wherein each electroluminescent element emits white light.

12. A lighting unit comprising:

a plurality of panels arranged adjacently, each panel having a transparent substrate, which has on opposite sides thereof a light exit surface and a light incidence surface, each panel also having an electroluminescent element that is provided on the light incidence surface of the transparent substrate, each panel further having end faces, wherein the light exit surfaces or the light incidence surfaces are positioned roughly in an identical plane, each electroluminescent element being located so as to exist on the same side relative to the plane; and

a scattering member provided on a side of the light exit surface of the transparent substrate and/or uneven portions formed on the light exit surface.

13. The lighting unit according to claim 12, further comprising a light scattering means provided between the panels adjacent to each other.

14. The lighting unit according to claim 12, wherein a plurality of the electroluminescent elements are electrically connected in series.

15. The lighting unit according to claim 12, wherein each electroluminescent element emits white light.