Abstract:
The present invention generally relates to a field emission light source and specifically to a miniaturized field emission light source that is possible to manufacture in large volumes at low cost using the concept of wafer level manufacturing, i.e. a similar approach as used by IC's and MEMS. The invention also relates to a lighting arrangement comprising at least one field emission light source. The field emission light source comprises: - a field emission cathode (106) comprising a plurality of nanostructures (104) formed on a substrate; - an electrically conductive anode structure (108) comprising a first wavelength converting material (118) arranged to cover at least a portion of the anode structure, wherein the first wavelength converting material is configured to receive electrons emitted from the field emission cathode and to emit light of a first wavelength range, and - means for forming an hermetically sealed and subsequently evacuated cavity (106) between the substrate of the field emission cathode and the anode structure, including a spacer structure (302, 110) arranged to encircle the plurality of nanostructures, wherein the substrate for receiving the plurality of nanostructures is a wafer (102').
Abstract:
The present disclosure generally relates to field emission cathode structure for a field emission arrangement, specifically adapted for enhance reliability and prolong the lifetime of the field emission arrangement by arranging a getter element underneath a gas permeable portion of the field emission cathode structure. The present disclosure also relates to a field emission lighting arrangement comprising such a field emission cathode structure and to a field emission lighting system.
Abstract:
The present invention generally relates to an extraction structure for a UV lighting element. The present invention also relates to a UV lamp comprising such an extraction structure onto a substrate. The extraction structure comprises a plurality of nanostructures for anti-reflecting purposes. The nanostructures are grown on the top surface of at least one of the first and second side of the substrate.
Abstract:
The present disclosure generally relates to a system for treating a surface, comprising an ultraviolet (UV) lighting arrangement configured to emit UV light towards the surface at a first and a second wavelength range to effectively reduce microorganisms at the surface.
Abstract:
The present invention relates to the field of field emission lighting, and specifically to a method for forming a field emission cathode. The method comprises arranging a growth substrate in a growth solution comprising a Zn-based growth agent, the growth solution having a pre-defined pH-value at room temperature; increasing the pH value of the growth solution to reach a nucleation phase; upon increasing the pH of the solution nucleation starts. The growth phase is then entered by decreasing the pH. The length of the nanorods is determined by the growth time. The process is terminated by increasing the pH to form sharp tips. The invention also relates to a structure for such a field emission cathode and to a lighting arrangement comprising the field emission cathode.
Abstract:
The present invention relates to a method for controllably growing ZnO nanowires, for example to be used in relation to field emission lighting. In particular, the invention relates to a method of controlling thermal oxidation conditions to achieve steady-state conditions between an oxygen consumption rate by a growing oxide on a surface of a structure and the decomposition rate of the oxygen-carrying species within the chamber. The invention also relates to a corresponding field emission cathode.
Abstract:
The present invention relates to a field emission lighting arrangement, comprising an anode and a cathode, where the shape of the cathode is selected based on the shape of a evacuated envelope in which the anode and cathode is provided. The inventive shape of cathode allows for an improved uniformity of an electric field provided between the anode and cathode during operation of the field emission lighting arrangement. The invention also relates to a corresponding method for selecting a shape of such a cathode.
Abstract:
There is provided a method for manufacturing a plurality of nanostructures comprising the steps of providing a plurality of spherical Zn structures andoxidizing the spherical structures in ambient atmosphere at a temperature in the range of 350°C to 600°C for a time period in the range of h to 172h, such that ZnO nanowires protruding from the spherical structures are formed. There is also provided a field emission arrangement comprising a cathode having the aforementioned ZnO nanowire structures arranged thereon.
Abstract:
The present invention generally relates to an x-ray source and specifically to an x-ray source suitable for large area x-ray generation. The invention also relates to a system comprising such an x-ray source.
Abstract:
The present invention generally relates to a method for operating a plurality of field emission light sources, specifically for performing a testing procedure in relation to a plurality of field emission light sources manufactured in a chip based fashion. Each field emission light source comprising a cathode side including an electrical cathode connection and an oppositely arranged anode side including an electrical cathode connection. The method comprises: - arranging the plurality of field emission light sources in vicinity of each other in a matrix formation having m rows and n columns, where the electrical cathode connections for the field emission light sources are electrically connected to each other in line with the columns, and the electrical anode connection for the field emission light sources are electrically connected to each other in line with the rows, - providing an electrical interface point for each of the m rows and the n columns, and - applying a control signal to at least one of the electrical interface points at each of the m rows and to at least one of the electrical interface points at each of the n columns, thereby energizing at least one of the field emission light sources for emitting light. The invention also relates to a corresponding testing system.