A chip testing method and an apparatus for testing of a plurality of field emission light sources
AssigneesLightlab Sweden AB, Nanyang Technological University
InventorsJonas TIRÉN, Hilmi Volkan DEMIR, Vijay Kumar SHARMA, Swee Tiam TAN
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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. The invention also relates to a corresponding testing system.
Claims20
A method of controlling a plurality of field emission light sources, each field emission light source comprising a cathode side including an electrical cathode connection and an oppositely arranged anode side including an electrical anode connection, wherein 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 connections for the field emission light sources are electrically connected to each other in line with the rows,
- proving an electrical interface point for each of the m rows and the n columns,
- 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,
- acquiring, using a light sensor, an indication of a photonic output from the at least one energized field emission light source,
- determining an operational status for the at least one energized field emission light source based on the indication of the photonic output from the at least one energized field emission light source, and
- separating the field emission light sources from each other, wherein the separation is based on the operational status for the at least one energized field emission light source.
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A system adapted for controlling a plurality of field emission light sources, wherein:
- each field emission light source comprising a cathode side including an electrical cathode connection and an oppositely arranged anode side including an electrical anode connection,
- the plurality of field emission light sources being arranged 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 connections for the field emission light sources are electrically connected to each other in line with the rows, and
- at least one electrical interface point being arranged at each of the m rows and at least one interface point being arranged at each of the n columns, wherein the system comprises:
- a first electrical contact adapted to be connected the at least one interface point of the m rows and a second electrical contact to be connected to the at least one test point of the n columns, and
- means for applying a control signal to the first and the second electrical contacts, thereby energizing at least one of the field emission light sources for emitting light, wherein the system is further adapted to:
- acquire, using a light sensor comprised with the system, an indication of a photonic output from the at least one energized field emission light source,
- determine an operational status for the at least one energized field emission light source, and
- separate the field emission light sources from each other, wherein the separation is based on the operational status for the at least one energized field emission light source.
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Dependencies are inferred from the claim text.