Abstract: A plurality of batteries is printed on a flexible substrate, where each battery may output the same voltage, such as about 1.5 volts. Batteries in a first subset are connectable in parallel by controllable switches to control the maximum current that can be delivered to a load. Batteries in a second subset are also connectable in parallel by additional controllable switches to control the maximum current that can be delivered to the load. Another group of switches can either connect the two subsets of batteries in series, to generate 3 volts, or connect the subsets in parallel to increase the maximum current. Additional subsets of batteries and their associated switches may be further connected to increase the voltage and current. The power supply may be standardized and configured by the user for a particular load, such as a sensor for a medical skin patch.

Abstract: A plurality of batteries is printed on a flexible substrate, where each battery may output the same voltage, such as about 1.5 volts. Batteries in a first subset are connectable in parallel by controllable switches to control the maximum current that can be delivered to a load. Batteries in a second subset are also connectable in parallel by additional controllable switches to control the maximum current that can be delivered to the load. Another group of switches can either connect the two subsets of batteries in series, to generate 3 volts, or connect the subsets in parallel to increase the maximum current. Additional subsets of batteries and their associated switches may be further connected to increase the voltage and current. The power supply may be standardized and configured by the user for a particular load, such as a sensor for a medical skin patch.

Abstract: A flexible light sheet includes a thin substrate that allows light to pass through it, a transparent first conductor layer overlying the substrate, an array of vertical light emitting diodes (VLEDs) printed as an ink over the first conductor layer, each of the VLEDs having a bottom electrode electrically contacting the first conductor layer, a dielectric material between the VLEDs overlying the first conductor layer, and a transparent second conductor layer overlying the VLEDs and dielectric layer, each of the VLEDs having a top electrode electrically contacting the transparent second conductor layer. Each individual VLED may emit light bidirectionally. The VLEDs are illuminated by a voltage differential between the first conductor layer and the second conductor layer such that bidirectional light passes through the first conductor layer and the second conductor layer. Phosphor layers may be deposited on both sides to create white light using blue VLEDs.

Abstract: A flexible light sheet includes a thin substrate that allows light to pass through it, a transparent first conductor layer overlying the substrate, an array of vertical light emitting diodes (VLEDs) printed as an ink over the first conductor layer, each of the VLEDs having a bottom electrode electrically contacting the first conductor layer, a dielectric material between the VLEDs overlying the first conductor layer, and a transparent second conductor layer overlying the VLEDs and dielectric layer, each of the VLEDs having a top electrode electrically contacting the transparent second conductor layer. Each individual VLED may emit light bidirectionally. The VLEDs are illuminated by a voltage differential between the first conductor layer and the second conductor layer such that bidirectional light passes through the first conductor layer and the second conductor layer. Phosphor layers may be deposited on both sides to create white light using blue VLEDs.

Abstract: The invention relates to a light source comprising a phosphor composition 14 and a light emitting device 12 such as an LED or a laser diode 32. The phosphor composition 14 absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO3:Ce3+,Tb3+; BaMgAl10O17:Eu2+,Mn2+; (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+; and Y3Al5O12—Ce3+; and at least one of: Y2O2S:Eu3+,Bi3+; YVO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; and (Ca,Sr)S:Eu2+. The phosphor composition 14 and the light source 12 together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.

Abstract: There is provided a halophosphate phosphor having the formula (Ca, Mg, Ba, Sr, Zn)5(PO4)3(F, Cl, Br): Sb3+, Mn2+ doped with at least one rare earth ion which has a higher charge carrier capture cross section than the phosphor lattice defects. The rare earth ion preferentially traps charge carriers and thus decreases the density of color centers. The rare earth ions are preferably trivalent ions selected from Eu3+, Sm3+, Yb3+, Tm3+, Ce3+, Tb3+ and Pr3+.

Abstract: There is provided an emissive mixture for cathodes of fluorescent lamps comprising a ceramic material having a formula (A1-x Cax)6 (Ta1-y Wy)2 O11+y, where A is barium or a combination of barium and strontium, 0≦x<0.5, 0≦y<1, and one of x or y is greater than zero. The ratio of lamp efficacy to number of lamp starts may be improved by optimizing the amount of Ca and W present in the ceramic material.

Abstract: Ca8Mg(SiO4)4Cl2:Eu2+,Mn2+ and Y2O3:Eu3+,Bi3+ are phosphors which have been sensitized to absorb ultraviolet radiation, such as from a light emitting diode, and to convert the radiation into visible light. A phosphor conversion material blend comprises Ca8Mg(SiO4)4Cl2:Eu2+,Mn2+; Y2O3:Eu3+,Bi3+, and known blue phosphors that absorb ultraviolet radiation from a LED and convert the radiation into visible bright white light. Also, a light emitting assembly comprises at least one of a red, green and blue phosphor for absorbing and converting ultraviolet radiation into visible light. A laser diode can be used to activate the phosphors to provide improved efficiency and brightness.

Abstract: The invention relates to a light source comprising a phosphor composition and a light emitting device such as an LED or a laser diode. The phosphor composition absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO3:Ce3+,Tb3+; BaMgAl10O17:Eu2+,Mn2+; (Sr,Ca,Ba)(Al,Ga)2S4:Eu2+; and Y3Al5O12—Ce3+; and at least one of: Y2O2S:Eu3+,Bi3+; YVO4:Eu3+,Bi3+; SrS:Eu2+; SrY2S4:Eu2+; CaLa2S4:Ce3+; and (Ca,Sr)S:Eu2+. The phosphor composition and the light source together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.