Abstract:
An electroluminescent lamp assembly wherein the basic lamp electrode structure is encased in at least one layer of a primary encapsulant material and at least one layer of a secondary encapsulant material, a layer of substantially transparent polymeric film material, which is thermally stable up to temperatures of at least 300.degree. F., being disposed between the primary and secondary encapsulants. The polymeric film material is bonded to the primary encapsulant using a silane agent to enhance the adhesion thereto. In a preferred embodiment of the lamp assembly a gas suppressant agent is included in the electroluminescent material and the light transmitting electrode thereof has a substantially transparent and infusible coating of a polymeric material having release characteristics on its exterior surface, such coating providing an unbonded contact between such electrode and the layer of material adjacent thereto. In a further embodiment thereof the terminal leads attached to the electrodes are coated at their contact areas with a powdered solder in a curable and infusible thermosetting binder which coated areas form solder joints during the sealing of the encapsulant of the lamp assembly.
Abstract:
An electroluminescent (EL) lamp element and a process for making same. The EL lamp element has a monolayer of phosphor particles deposited in a resin binder material. The sizes of the particles are controllably pre-selected to lie within a selected range thereof. The thickness of the resin binder layer is about one-half that of the average particle size so that the tendency of the resin to migrate through the particles and to cover the surfaces of the particles is prevented. A second resin binder layer is then deposited over the exposed surfaces of phosphor particles to form a relatively thin monolayer of particles uniformly distributed in the resin binder layers. If desired, the particles can be coated with a colloidal silica material to prevent any agglomeration thereof when depositing them in the resin binder layer.
Abstract:
A lamp assembly for providing light emission only over a selected portion of the visible spectrum which lamp assembly includes an electroluminescent means for emitting light over a predeterminable range of the visible spectrum which includes such selected portion. The lamp assembly further includes a first fluorescent means which absorbs light emitted by the electroluminescent means over another portion of the predeterminable range which does not include the selected portion thereof and emits the absorbed light over the desired selected portion. Additional light emitted by the electroluminescent means over still other portions of the visible spectrum can be prevented from emission from the lamp assembly by the use of a suitable filter therefor or by the use of an additional fluorescent means which absorbs such additional light and emits such absorbed light over the portion of the spectrum in which light is absorbed by the first fluorescent means.
Abstract:
A CURRENT CONTROLLING DEVICE FOR AN ELECTRICAL CIRCUIT INCLUDING A SEMICONDUCTOR ELEMENT AND ELECTRODES IN LOW ELECTRICAL RESISTANCE CONTACT THEREWITH, WHEREIN SAID SEMICONDUCTOR ELEMENT HAS A TREASHOLD VOLTAGE VALUE AND A HIGH ELECTRICAL RESISTANCE TO PROVIDE A BLOCKING CONDITION FOR SUBSTANTIALLY BLOCKING CURRENT THERETHORUGH, WHEREIN THE HIGH ELECTRICAL RESISTANCE IS SUBSTANTIALLY INSTANTANEOUSLY DECREASED TO A LOW RESISTANCE IN RESPONSE TO A VOLTAGE ABOVE SAID THRESHOLD VOLTAGE VALUE TO PROVIDE A CONDUCTING CONDITION FOR SUBSTANTIALLY CONDUCTING CURRENT THERETHROUGH, WHREIN THE SEMICONDUCTOR ELEMENT COMPRISES HIGH ELECTRICAL RESISTANCE REFRACTORY POWDER PARTICLES SUBSTANTIALLY INDIVIDUALLY COATED WITH A THIN SOLID COATING OF SUBSTANTIALLY VO2, WHEREIN THE HIGH ELECTRICAL RESISTANCE REFRACTORY POWDER PARTICLES MAY COMPRISE SNO2, SIO2, AL2O3, ZRO2, RO TIO2 OR THE LIKE, WHEREIN THE THIN SUBSTAINTIALLY VO2 COATING ON THE PARTICLES IS OBTAINED FROM V2O3 AND/OR V2O3 IN THE FORMATION THEREOF BY SEVERAL METHODS DESCRIBED HEREIN, WHEREIN THE DEVICES MAY BE OF THE NONMEMORY TYPE OR THE MEMROYTYPE, AND WHEREIN THE DEVICES MAY HAVE AN INTERMEDIATE OR PARTIAL CONDUCTING CONDITION.