초록 ▼

An illumination system for illuminating a display device (3) comprises a light-emitting panel (1) having a light-emission window (2) and at least one edge surface (4) for coupling light into the light-emitting panel (1). The illumination system further comprises a light mixing chamber (5) provided w

An illumination system for illuminating a display device (3) comprises a light-emitting panel (1) having a light-emission window (2) and at least one edge surface (4) for coupling light into the light-emitting panel (1). The illumination system further comprises a light mixing chamber (5) provided with a light source (6). The light mixing chamber (5) is associated with the edge surface (4). According to the invention, the light source (6) comprises a plurality of clusters of light-emitting diodes (LEDs) having different light-emission wavelengths, the clusters being arranged at a pitch P with respect to each other. The ratio of the height H of the light mixing chamber (5) to the pitch P of the clusters meets the relation 0.1≤H/P≤10, preferably 0.2≤H/P≤2. Preferably, each cluster comprises one blue, one green and one red LED, or one blue, two green and one red LEDs. Preferably, each LED has a luminous flux of at least 5 lumen. The illumination system according to the invention has a very uniform light distribution, so that the display device is uniformly illuminated.

대표청구항 ▼

An illumination system for illuminating a display device (3) comprises a light-emitting panel (1) having a light-emission window (2) and at least one edge surface (4) for coupling light into the light-emitting panel (1). The illumination system further comprises a light mixing chamber (5) provided w

An illumination system for illuminating a display device (3) comprises a light-emitting panel (1) having a light-emission window (2) and at least one edge surface (4) for coupling light into the light-emitting panel (1). The illumination system further comprises a light mixing chamber (5) provided with a light source (6). The light mixing chamber (5) is associated with the edge surface (4). According to the invention, the light source (6) comprises a plurality of clusters of light-emitting diodes (LEDs) having different light-emission wavelengths, the clusters being arranged at a pitch P with respect to each other. The ratio of the height H of the light mixing chamber (5) to the pitch P of the clusters meets the relation 0.1≤H/P≤10, preferably 0.2≤H/P≤2. Preferably, each cluster comprises one blue, one green and one red LED, or one blue, two green and one red LEDs. Preferably, each LED has a luminous flux of at least 5 lumen. The illumination system according to the invention has a very uniform light distribution, so that the display device is uniformly illuminated. nd the spacer plate being disposed between the base plate and the manifold plate. 6. An ink-jet printer head as claimed in claim 5, wherein a cross sectional area of each of the plurality of longitudinal and lateral grooves is less than a cross sectional area of each spacer plate through hole. 7. An ink-jet printer head as claimed in claim 1, the base plate further comprising a plurality of base plate grooves disposed adjacent to the pressure chambers. 8. An ink-jet printer head as claimed in claim 7, wherein each pressure chamber of the plurality of pressure chambers includes an end passage and an other end passage, and the base plate includes a base plate groove disposed adjacent to each end passage and each other end passage. 9. An ink-jet printer head as claimed in claim 8, the base plate further comprising a base plate groove disposed parallel to each pressure chamber of the plurality of pressure chambers. 10. An ink-jet printer head as claimed in claim 9, wherein a cross sectional area of each base plate groove is less than a cross sectional area of each pressure chamber of the plurality of pressure chambers, each end passage, and each other end passage. 11. An ink-jet printer head as claimed in claim 9, the base plate further comprising a narrow groove disposed between each pressure chamber of the plurality of pressure chambers and each other end passage of the other end passages, the narrow groove having a cross sectional area greater than the cross sectional area of each base plate groove of the plurality of base plate grooves. 12. A method for manufacturing an ink-jet printer head, comprising: providing a nozzle plate having a plurality of nozzles for ejecting ink; providing a base plate having a plurality of pressure chambers, each pressure chamber corresponding to each nozzle and having at least one base plate groove adjacent to the plurality of pressure chambers; providing a manifold plate having at least one ink passage and at least one manifold plate groove disposed adjacent to the ink passage; and stacking the nozzle plate, the base plate and the manifold plate using an adhesive disposed therebetween, wherein excess adhesive flows into the base plate groove and the manifold plate groove. 13. A method for manufacturing an ink-jet printer head as claimed in claim 12, further comprising: providing at least one manifold plate escape hole in the manifold plate and connecting the at least one manifold plate escape hole with the at least one manifold plate groove; providing at least one base plate escape hole in the base plate and connecting the at least one base plate escape hole with the at least one base plate groove; and forming an escape hole adhesive collection area by aligning the at least one manifold plate escape hole with the at least one base plate escape hole. 14. An electrical component, comprising: a plurality of plates, at least one of the plurality of plates including a pattern and having at least one groove adjacent to the pattern, wherein the plates are stacked using an adhesive applied therebetween so that excess adhesive flows into the at least one groove. 15. An electrical component as claimed in claim 14, wherein each one of the plurality of plates includes at least one escape hole, and the escape holes of each plate are aligned to form an adhesive collection area. 16. An electrical component as claimed in claim 14, wherein the at least one of the plurality of plates includes a first surface and a second surface and the at least one groove is disposed on only the first surface. 17. An ink-jet printer head, comprising: a nozzle plate having a plurality of nozzles for ejecting ink; a base plate having a first base plate surface, a second base plate surface, a plurality of pressure chambers and at least one base plate groove adjacent to the plurality of the pressure chambers, the at least one base plate groove being disposed only on the first base plate surface; a manifol d plate having a first manifold plate surface, a second manifold plate surface, at least one ink passage and at least one manifold plate groove adjacent to the at least one manifold plate groove, the at least one manifold plate groove being disposed only on the first manifold plate surface, the base plate and the manifold plate being stacked in such a manner that the first base plate surface opposes the second manifold plate surface; and an adhesive applied at the first base plate surface so that excess adhesive flows into the at least one base plate groove. 18. The ink-jet printer head as claimed in claim 17, wherein the nozzle plate and the manifold plate are stacked in such a manner that the first manifold plate surface opposes the nozzle plate, and the adhesive is applied at the first manifold plate surface so that excess adhesive flows into the at least one manifold plate groove. 19. The ink-jet printer head as claimed in claim 18, further comprising: a spacer plate having a first spacer plate surface, a second spacer plate surface, a plurality of spacer plate through holes and at least one spacer plate groove adjacent to the plurality of the spacer plate through holes, the at least one spacer plate groove being disposed on only the first spacer plate surface, each spacer plate through hole corresponding to each nozzle, the spacer plate and the manifold plate being stacked in such a manner that the first spacer plate surface opposes the second manifold plate surface; wherein the adhesive is applied between the first spacer plate surface and the second manifold plate surface so that excess adhesive flows into the at least one spacer plate groove. 20. The ink-jet printer head as claimed in claim 19, wherein the spacer plate further comprises at least one spacer plate ink supply hole, the at least one spacer plate groove including a plurality of lateral grooves, a plurality of longitudinal grooves, and at least one spacer plate curved groove, wherein each of the plurality of lateral grooves and each of the plurality of longitudinal grooves is disposed on only the first spacer plate surface and adjacent to the plurality of spacer plate through holes, and the at least one spacer plate curved groove is disposed on only the first spacer plate surface and about the at least one spacer plate ink supply hole. 21. The ink-jet printer head as claimed in claim 19, wherein: the base plate includes at least one ink supply hole penetrating the base plate, and the at least one base plate groove further comprises a first circular groove and a second circular groove, the first circular groove and the second circular groove being separate and disposed in concentric circles about the at least one ink supply hole; the first base plate surface opposes the second spacer plate surface; and the first circular groove defines an inner edge and the at least one ink supply hole defines a second edge, and the inner edge is separated from the second edge by at least 60 μm. 22. The ink-jet printer head as claimed in claim 21, wherein the first circular groove defines a first edge and the second circular groove defines a third edge, and the first edge is separated from the third edge by 60 μm. 23. The ink-jet printer head as claimed in claim 21, wherein the inner edge of the first circular groove is offset by at least 90 μm from the second edge. 24. The ink-jet printer head as claimed in claim 21, wherein the first circular groove defines an outer edge and the second circular groove defines a second inner edge, and the outer edge and the second inner edge are separated by at least 60 μm. 25. The ink-jet printer head as claimed in claim 18, wherein: the base plate includes at least one ink supply hole penetrating the base plate, and the at least one base plate groove further comprises at least one base plate circular groove disposed around the at least one ink supply hole; and the base plate and manifold plate are stacked so that th