Illumination system and display device
First Claim
1. An illumination system for illuminating a display device, the illumination system comprising:
- first and second light-emitting panels arranged so as to be at least substantially parallel, each panel having a front wall, a rear wall situated opposite said front wall, and edge areas between the front wall and the rear wall, at least one of the edge areas of the first and second panels being light-transmitting, at least one light source in each panel being associated with its respective light-transmitting edge area, and in operation, light originating from the light source being incident on the light-transmitting edge area and spreading in the panel, characterized in thatthe light source associated with the light-transmitting edge area of the first light-emitting panel comprises first and second light-emitting diodes having respective first and second light emission wavelengths, the light source associated with the light-transmitting edge area of the second light-emitting panel comprises a third light-emitting diode having a third light emission wavelength, and the first, the second and the third light emission wavelength being different.
1 Assignment
0 Petitions
Accused Products
Abstract
A backlight system includes at least first and second light-emitting panels (1; 11) having a front wall (2; 12), an opposing rear wall (3; 13) and opposite edge surfaces (4, 14; 5, 15). At least one of the edge surfaces (4; 14) is light-transmitting and associated with a light source (6; 16). Light originating from the light source is diffused in the light-emitting panels and coupled out of the light-emitting panels in the direction of a display device (25), preferably a LCD device. The light source associated with the first light-emitting panel (1) has clusters of red and blue or red and green LEDs. The light source (16) associated with the second light-emitting panel (11) has clusters of blue and green LEDs or only green LEDs.
55 Citations
22 Claims
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1. An illumination system for illuminating a display device, the illumination system comprising:
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first and second light-emitting panels arranged so as to be at least substantially parallel, each panel having a front wall, a rear wall situated opposite said front wall, and edge areas between the front wall and the rear wall, at least one of the edge areas of the first and second panels being light-transmitting, at least one light source in each panel being associated with its respective light-transmitting edge area, and in operation, light originating from the light source being incident on the light-transmitting edge area and spreading in the panel, characterized in that the light source associated with the light-transmitting edge area of the first light-emitting panel comprises first and second light-emitting diodes having respective first and second light emission wavelengths, the light source associated with the light-transmitting edge area of the second light-emitting panel comprises a third light-emitting diode having a third light emission wavelength, and the first, the second and the third light emission wavelength being different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An illumination system for illuminating a display device, the illumination system comprising:
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a first light-emitting panel, a second light-emitting panel and a third light-emitting panel, said first, second and third light-emitting panels arranged so as to be substantially parallel, each panel having a front wall, a rear wall situated opposite said front wall, and edge areas between the front wall and the rear wall, at least one of the edge areas of the first, second and third panels being light-transmitting, at least one light source in each panel being associated with its respective light-transmitting edge area, and in operation, light originating from the light source being incident on the light-transmitting edge area and spreading in the panel the light source associated with the light-transmitting edge area of the first light-emitting panel comprising a light-emitting diode having a first light emission wavelength, the light source associated with the light-transmitting edge area of the second light-emitting panel comprising a light-emitting diode having a second light emission wavelength, the light source associated with the light-transmitting edge area of the third light-emitting panel comprising a light-emitting diode having a third light emission wavelength, and the first, the second and the third light emission wavelength are different. - View Dependent Claims (15, 16, 17)
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18. An illumination system for illuminating a display device, the illumination system comprising:
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first and second light-emitting panels arranged so as to be at least substantially parallel, each panel having a front wall, a rear wall situated opposite said front wall, and edge areas between the front wall and the rear wall, at least one of the edge areas of the first and second panels being light-transmitting, at least one light source in each panel being associated with its respective light-transmitting edge area, and in operation, light originating from the light source being incident on the light-transmitting edge area and spreading in the panel, the light source associated with the light-transmitting edge area of the first light-emitting panel comprising first and second light-emitting diodes having respective first and second light emission wavelengths, the light source associated with the light-transmitting edge area of the second light-emitting panel comprising a third light-emitting diode having a third light emission wavelength, and the first, the second and the third light emission wavelength being different, wherein the light-emitting diodes comprise red (R), green (G) and blue (B) light-emitting diodes provided in a ratio of R;
G;
B of 2;
1;
1. - View Dependent Claims (19, 20)
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21. The illumination system as claimed in claim wherein the first light-emitting panel includes a plurality of alternately disposed red and green light-emitting diodes and the second light-emitting panel includes the plurality of only blue light-emitting diodes.
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22. An illumination system for illuminating a display device, the illumination system comprising:
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first and second light-emitting panels arranged so as to be at least substantially parallel, each panel having a front wall, a rear wall situated opposite said front wall, and edge areas between the front wall and the rear wall, at least one of the edge areas of the first and second panels being light-transmitting, at least one light source in each panel being associated with its respective light-transmitting edge area, and in operation, light originating from the light source being incident on the light-transmitting edge area and spreading in the panel, the light source associated with the light-transmitting edge area of the first light-emitting panel comprising first and second light-emitting diodes having respective first and second light emission wavelengths, the light source associated with the light-transmitting edge area of the second light-emitting panel comprising a third light-emitting diode having a third light emission wavelength, and the first, the second and the third light emission wavelength being different, wherein the light source associated with the second light-emitting panel further comprises a fourth light emitting diode.
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Specification