Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

Abstract: A method of operating an EWOD device to employs a magnetic field to separate magnetically responsive particles from a polar liquid droplet. The method includes the steps of dispensing a liquid droplet onto an element array of the EWOD device, wherein the liquid droplet includes magnetically responsive particles; performing an electrowetting operation to move the liquid droplet along the element array to a location relative to a magnet element in proximity to that location of the EWOD device; operating the magnet element to apply a magnetic field to the liquid droplet, wherein at least a portion of the magnetically responsive particles aggregate within the liquid droplet in response to the magnetic field; and separating the aggregated magnetically responsive particles from the liquid droplet with the magnetic field, wherein the aggregated magnetically responsive particles move in response to the magnetic field to a location on the element array in proximity to the magnet element.

Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

Abstract: An EWOD (or AM-EWOD) device includes a reference electrode and a plurality of array elements, each array element including an array element electrode, and control electronics. In a first mode optimized for EWOD actuation, the control electronics is configured to control a supply of time varying voltages to the array element electrodes and the reference electrode, thereby generating an actuation voltage as a potential difference between voltages at the array element electrodes and the reference electrode. The reference electrode includes a first electrical connection and a second electrical connection. In a second mode, the control electronics further is configured to supply an electrical current flow between the first electrical connection and the second electrical connection to generate resistance heat for controlling temperature of the EWOD device. Control may include sensing a temperature of the EWOD device, and switching between operating in the first or second mode based on the sensed temperature.

Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

Abstract: A method of determining the result of an assay in a microfluidic device includes the steps of: dispensing a sample droplet onto a first portion of an electrode array of the microfluidic device; dispensing a reagent droplet onto a second portion of the electrode array of the microfluidic device; controlling actuation voltages applied to the electrode array to mix the sample droplet and the reagent droplet into a product droplet; sensing a dynamic property of the product droplet; and determining an assay of the sample droplet based on the sensed dynamic property. The dynamic property is a physical property of the product droplet that influences a transport property of the product droplet on the electrode array. Example dynamic properties of the product droplet include the moveable state, split-able state, and viscosity based on droplet properties. The method may be used to perform an amoebocyte lysate (LAL) assay.

Abstract: A method of droplet manipulation utilizing a droplet manipulation device includes activating elements of the device to bring a first droplet into proximity of a second droplet, controlling the elements of the device to alter the shape of at least one of the first and second droplets, and further controlling the elements of the device to move at least one of the first or second droplets until the droplets are in contact about an aggregate area. The elements are controlled in a manner so as to control the area of contact and the degree of mixing of the fluid between the first and second droplets. The method may be employed to move particles of a particulate suspension from the first droplet to the second droplet. The droplet manipulation device may be an electrowetting on dielectric (EWOD) device, which includes shaping electrodes activated to shape droplets, and a bridging electrode activated to join the droplets to transfer fluid between the shaped droplets.

Abstract: An EWOD (or AM-EWOD) device includes a reference electrode and a plurality of array elements, each array element including an array element electrode, and control electronics. In a first mode optimized for EWOD actuation, the control electronics is configured to control a supply of time varying voltages to the array element electrodes and the reference electrode, thereby generating an actuation voltage as a potential difference between voltages at the array element electrodes and the reference electrode. The reference electrode includes a first electrical connection and a second electrical connection. In a second mode, the control electronics further is configured to supply an electrical current flow between the first electrical connection and the second electrical connection to generate resistance heat for controlling temperature of the EWOD device. Control may include sensing a temperature of the EWOD device, and switching between operating in the first or second mode based on the sensed temperature.

Abstract: An active matrix device is provided which includes N array elements arranged spatially in a sequence of first through Nth array elements (where N is an integer ?2); the N array elements each including a write input for receiving a corresponding write input signal which controls operation of the array element, and a sense circuit for sensing a property of the array element and providing a sensor output based on the sensed property; and further including a manipulation circuit including logic circuitry connecting the sensor output from an nth array element in the sequence directly to the write input of an (n+1)th array element and configured to provide the write input signal to the write input of the (n+1)th array element based on the sensor output from the nth array element.

Abstract: A method of droplet manipulation utilizing a droplet manipulation device includes activating elements of the device to bring a first droplet into proximity of a second droplet, controlling the elements of the device to alter the shape of at least one of the first and second droplets, and further controlling the elements of the device to move at least one of the first or second droplets until the droplets are in contact about an aggregate area. The elements are controlled in a manner so as to control the area of contact and the degree of mixing of the fluid between the first and second droplets. The method may be employed to move particles of a particulate suspension from the first droplet to the second droplet.

Abstract: An array element circuit with an integrated impedance sensor is provided. The array element circuit includes an array element which is controlled by application of a drive voltage by a drive element; writing circuitry for writing the drive voltage to the drive element; and sense circuitry for sensing an impedance presented at the drive element.

Abstract: An active-matrix device is provided which includes a plurality of array element circuits arranged in rows and columns; a plurality of source addressing lines each shared between the array element circuits in corresponding same columns; a plurality of gate addressing lines each shared between the array element circuits in corresponding same rows; a plurality of sensor row select lines each shared between the array element circuits in corresponding same rows, wherein each of the plurality of array element circuits includes: an array element which is controlled by application of a drive voltage by a drive element; writing circuitry for writing the drive voltage to the drive element, the writing circuitry being coupled to a corresponding source addressing line and gate addressing line among the plurality of source addressing lines and gate addressing lines; and sense circuitry for sensing an impedance presented at the drive element, the sense circuitry being coupled to a corresponding sensor row select line; and

Abstract: A microfluidic system includes a microfluidic device; and a metered fluid loading system formed integrally with the microfluidic device and configured to load a discrete metered volume of fluid into the microfluidic device upon actuation.

Abstract: An array element for a temperature sensor array circuit. The array element includes a switch transistor; and a temperature sensor element having an impedance which varies as a function of temperature, the temperature sensor element being connected in parallel with a source and drain of the switch transistor.

Abstract: A display is switchable between a first display mode with a first viewing angle range, a second display mode having a second viewing angle range smaller than the first viewing angle range and a multiple view directional display mode. The display includes an image display layer and a control element that is switchable between a first state in which it cooperates with the image display layer to provide the first display mode, a second state in which it cooperates with the image display layer to provide the second display mode, and a third state in which it cooperates with the image display layer to provide the multiple view directional display mode.

Abstract: An active matrix device is provided which includes N array elements arranged spatially in a sequence of first through Nth array elements (where N is an integer ?2); the N array elements each including a write input for receiving a corresponding write input signal which controls operation of the array element, and a sense circuit for sensing a property of the array element and providing a sensor output based on the sensed property; and further including a manipulation circuit including logic circuitry connecting the sensor output from an nth array element in the sequence directly to the write input of an (n+1)th array element and configured to provide the write input signal to the write input of the (n+1)th array element based on the sensor output from the nth array element.

Abstract: An active matrix electrowetting on dielectric (AM-EWOD) device which includes a plurality of array elements configured to manipulate one or more droplets of fluid on an array, each of the array elements including a corresponding array element circuit. Each array element circuit includes a top substrate electrode and a drive electrode between which the one or more droplets may be positioned; circuitry configured to write data to the corresponding array element by selectively applying to the drive electrode either: (i) a time-varying voltage waveform V1 of amplitude VB and period t0; or (ii) a time-varying voltage waveform V2, the logical inverse of V1, and applying to the top substrate electrode the time-varying voltage waveform V2+Voffset, where Voffset represents an offset voltage signal which may have AC and/or DC components and may equal zero.

Abstract: An active-matrix device is provided which includes a plurality of array element circuits arranged in rows and columns; a plurality of source addressing lines each shared between the array element circuits in corresponding same columns; a plurality of gate addressing lines each shared between the array element circuits in corresponding same rows; a plurality of sensor row select lines each shared between the array element circuits in corresponding same rows, wherein each of the plurality of array element circuits includes: an array element which is controlled by application of a drive voltage by a drive element; writing circuitry for writing the drive voltage to the drive element, the writing circuitry being coupled to a corresponding source addressing line and gate addressing line among the plurality of source addressing lines and gate addressing lines; and sense circuitry for sensing an impedance presented at the drive element, the sense circuitry being coupled to a corresponding sensor row select line; and

Abstract: An array element circuit with an integrated impedance sensor is provided. The array element circuit includes an array element which is controlled by application of a drive voltage by a drive element; writing circuitry for writing the drive voltage to the drive element; and sense circuitry for sensing an impedance presented at the drive element.