Patent application number | Description | Published |
20090278141 | Light-emitting devices and displays with improved performance - Light-emitting devices and displays with improved performance are disclosed. A light-emitting device includes an emissive material disposed between a first electrode, and a second electrode. Various embodiments include a device having a peak external quantum efficiency of at least about 2.2%; a device that emits light having a CIE color coordinate of x greater than 0.63; a device having an external quantum efficiency of at least about 2.2 percent when measured at a current density of 5 mA/cm | 11-12-2009 |
20100044635 | Blue emitting semiconductor nanocrystals and compositions and devices including same - A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation. In a further embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation. | 02-25-2010 |
20100044636 | Semiconductor nanocrystals and compositions and devices including same - A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising zinc, cadmium, and sulfur and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material. In a further embodiment, a semiconductor nanocrystal includes a core comprises a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation. In a further embodiment, a semiconductor nanocrystal including a core comprises a first semiconductor material comprising zinc, cadmium, and selenium and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation. | 02-25-2010 |
20100051870 | Semiconductor nanocrytals and compositions and devices including same - A semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. The present invention further relates to compositions and devices including semiconductor nanocrystals capable of emitting light with an improved photoluminescence quantum efficiency. A semiconductor nanocrystal wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 50% upon excitation and including a maximum peak emission with a FWHM less than 20 nm is disclosed. Also disclosed are a device, a population of semiconductor nanocrystals, and a composition including a semiconductor nanocrystal wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 50% upon excitation and including a maximum peak emission with a FWHM less than 20 nm. A semiconductor nanocrystal that is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 90%. Also disclosed are a device, a population, and a composition including a semiconductor nanocrystal. | 03-04-2010 |
20100051901 | Light emitting devices and displays with improved performance - Light emitting devices and devices with improved performance are disclosed. In one embodiment, a light emitting device includes an emissive material disposed between a first electrode, and a second electrode, wherein the emissive material comprises semiconductor nanocrystals capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation, wherein the light emitting device can have a peak external quantum efficiency of at least about 1.0 percent. Also disclosed is a display including at least one light emitting device including an emissive material disposed between a first electrode, and a second electrode, wherein the at least one light emitting device can have a peak external quantum efficiency of at least about 1.0 percent. In another embodiment, a light emitting device includes an emissive material disposed between a first electrode and a second electrode. The emissive material comprises semiconductor nanocrystals capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation. The device further includes a first spacer material disposed between the emissive material and the first electrode. In certain embodiments, the device further includes a first material capable of transporting charge disposed between the emissive material and the first electrode, wherein the first spacer material is disposed between the emissive material and the first electrode. In certain embodiments, for example, light emitting devices can have a maximum peak emission in a range from about 380 nm to about 500 nm. In certain embodiments, the light emitting device can have a maximum peak emission peak in the range from about 450 nm to about 490 nm. Displays including light emitting devices are also disclosed. | 03-04-2010 |
20120100417 | ELECTROLYTE COMPOSITIONS AND METHODS OF MAKING AND USING THE SAME - Electrolyte compositions suitable for use in batteries, such as a lithium ion battery, are disclosed The electrolyte compositions include functionalized metal oxide particles In several embodiments the compositions utilize the presence of solvent or a scavenger Methods of making and using electrolyte compositions are also disclosed Articles of manufacture containing an electrolyte composition are also disclosed | 04-26-2012 |
20130221291 | SEMICONDUCTOR NANOCRYSTALS AND COMPOSITIONS AND DEVICES INCLUDING SAME - A composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%. Also disclosed is a composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation. | 08-29-2013 |
20130234109 | Blue Emitting Semiconductor Nanocrystals And Compositions And Devices Including Same - A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation. In a further embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation. | 09-12-2013 |
20140312300 | SEMICONDUCTOR NANOCRYSTALS AND COMPOSITIONS AND DEVICES INCLUDING SAME - A semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with an improved photoluminescence quantum efficiency. Also disclosed are populations of semiconductor nanocrystals, compositions and devices including a semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. In one embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%. In another embodiment, a semiconductor nanocrystal includes a core comprising a first semiconductor material comprising zinc, cadmium, and sulfur and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material. In a further embodiment, a semiconductor nanocrystal includes a core comprises a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation. In a further embodiment, a semiconductor nanocrystal including a core comprises a first semiconductor material comprising zinc, cadmium, and selenium and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation. | 10-23-2014 |
Patent application number | Description | Published |
20120314864 | Broadcast Replenishment of Account Parameters for Groups of Wireless Devices - A system and method are provided for the broadcast replenishment of account parameters for select groups of wireless devices, where select groups of wireless devices have their internally-stored account parameters (e.g., prepaid amount of usage authorization) simultaneously updated as a group by a single broadcast message, such as an encrypted SMS message. An account update message is generated based on the account parameters to be updated and encrypted using an encryption key uniquely associated with the select group of wireless devices. The encrypted account update message is broadcast for receipt by the select group of wireless devices, such only those wireless devices previously provided with a key for decryption can receive and decrypt the broadcast account update message. The wireless devices use information and/or instructions in the broadcast message in order to update their internally stored account parameters accordingly. | 12-13-2012 |
20130310087 | MOBILE DEVICE MESSAGE SCHEDULER FOR REDUCING CONGESTION - A method, device and system are provided for scheduling the delivery of messages from a wireless device in order to reduce congestion on the wireless network used by the wireless device. A message scheduler application operating on the wireless device intercepts messages being sent from at least one application running on the wireless device to a device layer for transmission, where intercepted messages are collected and held in a message queue for later transmission. The message scheduler monitors operation of the wireless device to detect the establishment of a communication connection, such as a voice call or packet data session, and causes the messages in the message queue to be transmitted from the wireless device utilizing logical channels assigned to the wireless device when setting up the communication connection that are different from the traffic channel assigned for the communication connection to transmit voice or data content. | 11-21-2013 |
20140038545 | DEVICE INITIATED REPLENISHMENT PROCEDURES FOR WIRELESS DEVICES - A method, device and system are provided for wireless device-initiated automatic replenishment of internally-stored account parameters associated with an amount of authorization for usage of the wireless device (e.g., prepaid amount of airtime minutes, data usage, messages, etc.). Upon determining within the wireless device that the account parameter(s) should be replenished, the wireless device transmits a message to a control server indicating that the wireless device intends to perform the determined replenishment according to the replenishment parameters stored within the wireless device. The wireless device delays performance of the replenishment for a predetermined period of time to determine whether the control server provides a response containing updated replenishment parameters. Depending upon whether the wireless device receives a response from the control server during the time period, the wireless device then replenishes the internally-stored account parameter(s) using either the previously stored replenishment parameters or the updated replenishment parameters. | 02-06-2014 |
20140113610 | Wireless Device Configured to Operate Under a Plurality of Different Brands and a Plurality of Different Networks and Configured to be Customized to One Brand and One Network - A process of configuring an electronic device and an electronic device configured to operate under a plurality of different brands and with a plurality different networks. The brand and network to be utilized are designated at the point-of-sale, during activation, by the seller, and/or by the user. The electronic device including a processor configured to execute instructions and a display device configured to generate an interface based in part in response to the processor. The electronic device further including a memory configured to store the instructions to operate the electronic device. The processor further configured to execute a component to designate a brand and network to be utilized at the point-of-sale, during activation, by the seller, and/or by the user. | 04-24-2014 |
20140128020 | HYBRID NETWORK BASED METERING SERVER AND TRACKING CLIENT FOR WIRELESS SERVICES - A process of tracking usage of a wireless device in a third party wireless network with a metering system includes implementing the metering system in a network separate from the third party wireless network and activating the wireless device in response to identification of the wireless device and confirmation of use of a tracking system to the metering system. The process further includes obtaining, by the metering system, an amount of wireless services used by the wireless device. The obtaining includes at least one of obtaining an amount of wireless services used from the third party wireless network and obtaining an amount of wireless services used from the tracking system. | 05-08-2014 |
20150031328 | Hybrid Network Based Metering Server and Tracking Client for Wireless Services - A process of tracking usage of a wireless device in a third party wireless network with a metering system includes implementing the metering system in a network separate from the third party wireless network and activating the wireless device in response to identification of the wireless device and confirmation of use of a tracking system to the metering system. The process further includes obtaining, by the metering system, an amount of wireless services used by the wireless device. The obtaining includes at least one of obtaining an amount of wireless services used from the third party wireless network and obtaining an amount of wireless services used from the tracking system. | 01-29-2015 |
Patent application number | Description | Published |
20140273941 | Packet-Based Usage Tracking for a Wireless Device - A method for tracking usage of a wireless device includes monitoring, at a tracking device connected to and different from a wireless network, information regarding a first data packet sent from a wireless device to the wireless network, wherein the information regarding the first data packet includes an identifier of the wireless device, an identifier of a first type of wireless service, and an amount of data included in the first data packet. | 09-18-2014 |
20140273944 | Wireless Account Management Application for a Wireless Device - A method for displaying wireless service usage information and account information using an account management application operating on a wireless device includes receiving, at the account management application operating on the wireless device and from a tracking module locally stored on the wireless device, wireless service usage information for a wireless subscriber associated with the wireless device, the wireless service usage information including one or more units of wireless services that the wireless subscriber has used, receiving, at the account management application operating on the wireless device and from a service provider over a wireless network, account information associated with the wireless subscriber associated with the wireless device, the service provider being different from the wireless device and the wireless network, and enabling presentation, on a display of the wireless device, of the account management application including the wireless service usage information and the account information for the wireless subscriber associated with the wireless device. | 09-18-2014 |
20140273948 | Proxy-Based Usage Tracking for a Wireless Device - A method for tracking usage of a wireless device includes monitoring a communications trigger to initiate communication with a wireless device over a wireless network, determining an identifier of the communication, comparing the identifier of the communication with a database including two or more communication identifiers and two or more proxy identifiers, each communication identifier being associated with a corresponding proxy identifier, identifying, in response to a comparison of the identifier of the communication with the database, a proxy corresponding with the identifier of the communication, monitoring data from the wireless device to a destination through the identified proxy, and receiving usage of the wireless device from the identified proxy to track the usage of the wireless device. | 09-18-2014 |