In an example, a display device includes a rollable display including a display side and an opposite non-display side. The rollable display includes a conductive material with a pattern disposed on the non-display side. The device includes a housing configured to house the rollable display and configured to roll in and roll out the rollable display along a first direction, and a capacitive sensor including a transmitter and a receiver electrode disposed within the housing and configured to sense the pattern.

In an example, a display device includes a rollable display including a display side and an opposite non-display side. The rollable display includes a conductive material with a pattern disposed on the non-display side. The device includes a housing configured to house the rollable display and configured to roll in and roll out the rollable display along a first direction, and a capacitive sensor including a transmitter and a receiver electrode disposed within the housing and configured to sense the pattern.

A wearing detection module configured to be fixed on a spectacle frame element of a smart spectacle frame, the spectacle frame element including a first surface configured to face the wearer when using the smart spectacle frame and a second surface opposed to the first surface, and the wearing detection module including a pair of sensors configured to measure one parameter indicative of the distance between the spectacle frame element and the wearer, one sensor is arranged on the first surface and the other one is arranged on the second surface, and a processing unit configured to receive data indicative of the parameter sensed by each sensors and to determine a wearing data indicative of the use by the wearer of the smart spectacle frame based on the received data.

The present invention relates to a method for measuring the active area of an active material in an electrode, comprising: manufacturing three types of electrodes including a first electrode coated with an electrode mixture including both an electrode active material and a conductive material, a second electrode coated with an electrode mixture which includes the electrode active material as a main ingredient and does not include the conductive material, and a third electrode coated with an electrode mixture which does not include the active material and includes the conductive material as a main ingredient; a cell manufacturing step of manufacturing three types of monocells by using the same types of electrodes; a capacitance measuring step of measuring, from the monocells, capacitance of each electrode used in the monocells; and an active area calculating step of calculating the active area of the electrode active material from the capacitance.

The present invention relates to a method for measuring the active area of an active material in an electrode, comprising: manufacturing three types of electrodes including a first electrode coated with an electrode mixture including both an electrode active material and a conductive material, a second electrode coated with an electrode mixture which includes the electrode active material as a main ingredient and does not include the conductive material, and a third electrode coated with an electrode mixture which does not include the active material and includes the conductive material as a main ingredient; a cell manufacturing step of manufacturing three types of monocells by using the same types of electrodes; a capacitance measuring step of measuring, from the monocells, capacitance of each electrode used in the monocells; and an active area calculating step of calculating the active area of the electrode active material from the capacitance.

The present invention relates to a method for measuring the active area of an active material in an electrode, comprising: manufacturing three types of electrodes including a first electrode coated with an electrode mixture including both an electrode active material and a conductive material, a second electrode coated with an electrode mixture which includes the electrode active material as a main ingredient and does not include the conductive material, and a third electrode coated with an electrode mixture which does not include the active material and includes the conductive material as a main ingredient; a cell manufacturing step of manufacturing three types of monocells by using the same types of electrodes; a capacitance measuring step of measuring, from the monocells, capacitance of each electrode used in the monocells; and an active area calculating step of calculating the active area of the electrode active material from the capacitance.

The present invention relates to a method for measuring the active area of an active material in an electrode, comprising: manufacturing three types of electrodes including a first electrode coated with an electrode mixture including both an electrode active material and a conductive material, a second electrode coated with an electrode mixture which includes the electrode active material as a main ingredient and does not include the conductive material, and a third electrode coated with an electrode mixture which does not include the active material and includes the conductive material as a main ingredient; a cell manufacturing step of manufacturing three types of monocells by using the same types of electrodes; a capacitance measuring step of measuring, from the monocells, capacitance of each electrode used in the monocells; and an active area calculating step of calculating the active area of the electrode active material from the capacitance.

A sheet detection device includes a sheet guiding component, a conductor element and a sensing element. The sheet guiding component is disposed in a sheet tray and movable between an initial position and a threshold position along a first direction. The conductor element is disposed in the sheet tray, and is conductor continuously extended and disposed correspondingly between the initial position and the threshold position. The sensing element is disposed on and moved with the sheet guiding component, and is disposed in spaced with the conductor element and overlaps with at least a part of the conductor element. An overlapping portion between the conductor element and the sensing element correspondingly generates a capacitance value, and the capacitance value changes gradually corresponding to the movement of the sensing element along the first direction.

A sheet detection device includes a sheet guiding component, a conductor element and a sensing element. The sheet guiding component is disposed in a sheet tray and movable between an initial position and a threshold position along a first direction. The conductor element is disposed in the sheet tray, and is conductor continuously extended and disposed correspondingly between the initial position and the threshold position. The sensing element is disposed on and moved with the sheet guiding component, and is disposed in spaced with the conductor element and overlaps with at least a part of the conductor element. An overlapping portion between the conductor element and the sensing element correspondingly generates a capacitance value, and the capacitance value changes gradually corresponding to the movement of the sensing element along the first direction.

In an example, a display device includes a rollable display including a display side and an opposite non-display side. The rollable display includes a conductive material with a pattern disposed on the non-display side. The device includes a housing configured to house the rollable display and configured to roll in and roll out the rollable display along a first direction, and a capacitive sensor including a transmitter and a receiver electrode disposed within the housing and configured to sense the pattern.