3m Innovative Properties Company

James F Poch

Hamid R Mortazavi

Kayla A McGrath

Michael Alan Meis

Raymond Patrick Johnston

Robert L Brott

Paul Edward Humpal

Orlin Bruce Knudson

Daniel M Pierpont

Martin J Vos

Mark G Mathews

Jae Yong Lee

James C Medek

Jake D Swensen

Blake R Shamla

Mikhail L Pekurovsky

Matthew S Stay

Perry S Dotterman

Ravi Palaniswamy

Shawn C Dodds

Roger W Barton

Charles N DeVore

Matthew R D Smith

Saagar A Shah

Alexander Chieruen Tsuei

Ankit Mahajan

Thomas J Metzler

Siang Sin Foo

Kayla A Hagens

Mahmut Aksit

Michael W Dolezal

Alejandro Aldrin A Narag, Ii

Gareth A Hughes

Antonny Enojo Flor

Timothy J Pommer

Loren E Moeri

Donato G Caraig

Michael J Meis

Alejandro Aldrin A Narag Ii

Antonny E Flor

Emily L Bowen

Systems and methods for monitoring the status of air filters are provided. One or more thermoelectric sensors are provided to have an upstream sensing surface positioned adjacent the inlet surface of the air filter, and a downstream sensing surface positioned adjacent the outlet surface of the air filter. Sensing circuitry are connected to the thermoelectric sensors, configured to receive signals from the thermoelectric sensors and process the signals to obtain status information of the air filter.

Air filtration monitoring based on thermoelectric devices

Electronic devices including a layer of polymeric material and solid semiconductor dies partially embedded in the layer are provided. The dies have first ends projecting away from the first major surface of the layer. The electronic devices can be formed by sinking the first ends of the dies into a major surface of a liner. A flowable polymeric material is filled into the space between the dies and solidified to form the layer of polymeric material. The first ends of the dies are exposed by delaminating the liner from the first ends of the dies. Electrical conductors are provided on the layer to connect the first ends of the dies.

Electronic devices including solid semiconductor dies

A method for a light bulb or fixture to emit light and measure ambient light. The method includes driving solid state light sources, such as LEDs, in the bulb with a cyclical signal to repeatedly turn them off and on, where the light sources are turned off and on at a rate sufficient for the bulb to appear on. The method also includes measuring ambient light via a light sensor in or on the bulb during at least some times when the light sources are off, and outputting a signal related to the measured ambient light. In some cases the light sensor saturates when the solid state light sources are active and measures the ambient light level when the solid state light sources are not active. The ambient light level signal can be used to control when the light bulb is on and an intensity of light output by the bulb.

Apparatus and method for ambient light measurement by a solid state light bulb

Apparatus for assessing the quality of membrane electrode assemblies

A method for a light bulb or fixture to emit light and measure ambient light. The method includes driving solid state light sources, such as LEDs, in the bulb with a cyclical signal to repeatedly turn the solid state light sources off and on, where the light sources are turned off and on at a rate sufficient for the bulb to appear on. The method also includes measuring ambient light via a light sensor in or on the bulb during at least some times when the light sources are off, and outputting a signal related to the measured ambient light. The ambient light level signal can be used to control when the light bulb is on and an intensity of light output by the bulb.

A method for assessing the quality of a membrane electrode assembly (MEA), the method comprising:

Method for accessing the quality of membrane electrodes assemblies

A driver circuit is configured for connection to a power source and includes a plurality of light emitting diodes (LEDs) having at least one performance characteristic that varies according to different performance categories ranging between higher performance and lower performance. The driver circuit also includes a plurality of LED sections each populated with at least one LED of a different one of the different performance categories. Circuitry is coupled to the LED sections and configured to activate and deactivate the LED sections based on LED performance.

Sectioned network lighting device using full distribution of LED bins

A solid state light having a solid state light source such as LEDs, a light guide having an enclosed interior volume such as a bulb shape without vents, and a thermal guide. The light guide is coupled to the light source for receiving and distributing light from the light source. The thermal guide is at least partially contained within the interior volume with an air gap between a portion of the thermal guide and the light guide. The thermal guide provides for thermal conduction from the light source and dissipating heat through convection and radiation for cooling the light.

Solid state light with enclosed light guide and integrated thermal guide

Solid state light assembly

A solid state light having a shell forming an interior volume and with surface texture for redirecting light. A light section is coupled to the shell, and a light source board in the light section includes at least one solid state light source such as an LED. The shell, light section, and light source board have apertures for providing an air cooling channel through the light. The solid state light source transmits light into the interior volume, and the light exits from the shell and is redirected by the surface texture, providing for various light distribution curves of the light.

Solid state light with features for controlling light distribution and air cooling channels

Growing community of inventors

Ellsworth, WI, United States of America

James F Poch