White light-emitting device with improved doping
First Claim
1. An organic light-emitting diode (OLED) device that produces white light, including:
- a) an anode;
b) a hole-transporting layer disposed over the anode;
c) a blue light-emitting layer disposed over the hole-transporting layer;
d) an electron-transporting layer disposed over the blue light-emitting layer, e) a cathode disposed over the electron-transporting layer; and
f) the hole-transporting layer including a host material, a yellow dopant, and a red dopant.
2 Assignments
0 Petitions
Accused Products
Abstract
Organic light-emitting diodes (OLEDs) that produce white light include an anode, a hole-transporting layer disposed over the anode, a blue light-emitting layer disposed over the hole-transporting layer, an electron-transporting layer disposed over the blue light-emitting layer, and a cathode disposed over the electron-transporting layer. The hole-transporting layer is doped with both a yellow-emitting and a red-emitting dopant. When used together with red, green, and blue color filters, the OLEDs produce red, green, and blue light with good color quality and high efficiency. Also disclosed are multicolor display devices utilizing the OLEDs together with color filters or together with both color filters and liquid-crystal light valves.
96 Citations
46 Claims
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1. An organic light-emitting diode (OLED) device that produces white light, including:
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a) an anode;
b) a hole-transporting layer disposed over the anode;
c) a blue light-emitting layer disposed over the hole-transporting layer;
d) an electron-transporting layer disposed over the blue light-emitting layer, e) a cathode disposed over the electron-transporting layer; and
f) the hole-transporting layer including a host material, a yellow dopant, and a red dopant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A light-emitting display including:
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a) a plurality of OLEDs that produce white light when current is driven through them, each OLED including;
i) an anode;
ii) a hole-transporting layer disposed over the anode;
iii) a blue light-emitting layer disposed over the hole-transporting layer;
iv) an electron-transporting layer disposed over the blue light-emitting layer;
v) a cathode disposed over the electron-transporting layer; and
vi) the hole-transporting layer including a host material, a yellow dopant and a red dopant; and
b) an array of color filters, including red, green, and blue filters, disposed in the display, each filter corresponding to a different OLED such that the white light produced by each OLED is filtered by its corresponding filter. - View Dependent Claims (45)
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46. A light-emitting display including:
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a) one or more OLEDs that produce white light upon passage of electrical current through the OLED(s), each OLED including;
i) an anode;
ii) a hole-transporting layer disposed over the anode;
iii) a blue light-emitting layer disposed over the hole-transporting layer;
iv) an electron-transporting layer disposed over the blue light-emitting layer;
v) a cathode disposed over the electron-transporting layer; and
vi) the hole-transporting layer including a host material, a yellow dopant and a red dopant; and
b) an array of color filters, including red, green, and blue filters, disposed in the display such that the white light produced by the OLED(s) is filtered through the color filters; and
c) an array of liquid-crystal light valves, each light valve corresponding to a different color filter, disposed in the array such that the white light produced by the OLED(s) and filtered by the color filter is adjusted in brightness by the liquid-crystal light valves.
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Specification