A writeable display medium incorporating various sensing elements into the backplane of the writeable display medium so that the sensing elements can cause the associated pixels to update immediately in contrast to state-of-the art writeable displays that rely on a feedback loop between a digitizing layer and a display driver that controls the output of a display. As a stylus is moved over the display, a signal emitted from the stylus (e.g., an electromagnetic field) will change the state of a transistor associated with a pixel, resulting in a nearly instantaneous state change in the display (i.e., white to black).

The present disclosure provides a handwritten screen and a control display device. The handwritten screen includes a plurality of pixels arranged in an array, and a first substrate and a second substrate both being electrically insulating and thermally conductive. Each of the plurality of pixels includes a thermoelectric generator and a display unit connected with each other, the thermoelectric generator and the display unit are between the first substrate and the second substrate, and the thermoelectric generator generates an electric filed once there is a difference between a temperature of the first substrate and a temperature of the second substrate, so as to supply power to the display unit. The present disclosure effectively utilizes a difference in temperature between a finger (i.e., the first substrate) and an external environment (i.e., the second substrate) during touch, and converts thermal energy into electrical energy to perform thermoelectric power generation.

A writeable display medium incorporating various sensing elements into the backplane of the writeable display medium so that the sensing elements can cause the associated pixels to update immediately in contrast to state-of-the art writeable displays that rely on a feedback loop between a digitizing layer and a display driver that controls the output of a display. As a stylus is moved over the display, a signal emitted from the stylus (e.g., an electromagnetic field) will change the state of a transistor associated with a pixel, resulting in a nearly instantaneous state change in the display (i.e., white to black).

An optical polarizer includes a dielectric substrate and a number of elongated dielectric ridges positioned or disposed in spaced relation on a surface of the substrate. Each dielectric ridge has a length direction, curved or straight, that extends along the surface of the substrate. Each dielectric ridge also includes a pair of spaced sides that extend away from the surface of the substrate and a top extending between the spaced sides opposite the surface of the substrate. Each side of each dielectric ridge includes an electrically conductive coating.

An optical isolator includes a polarizer for receiving an optical signal from an optical signal source, a Faraday rotator disposed on one surface of the polarizer for rotating a polarization of the optical signal output by the polarizer and outputting the same as a rotator output optical signal, and an analyzer disposed on an opposing surface of the polarizer for receiving the rotator output optical signal and for outputting at least a part thereof. The polarizer and the analyzer each include a number of spaced elongated dielectric ridges. Each dielectric ridge has a length direction extending along the one surface of the Faraday rotator, pair of spaced sides that extend away from the one surface of the Faraday rotator and a top extending between the spaced sides opposite the one surface of the Faraday rotator. Each dielectric ridge includes an electrically conductive coating on each side of the dielectric ridge.

A security device that elicits at least one dynamic response upon acceleration, or upon change of orientation with respect to gravity, wherein the dynamic response continues after cessation of the acceleration or the change of orientation. In addition, the dynamic response can be optical, such that it is visually observable by an unaided human eye. Alternatively, the response can be machine readable. In some cases, the dynamic response has duration of from about 0.01 s to about 100 s, or from about Is to about 10 s.

Systems and methods for ambient light management for a transparent display are described herein. For example, an illustrative display system may comprise an ambient light sensor configured to detect a first spectral power distribution associated with ambient light. The display system may further comprise a transparent display including a display panel and an optical stack. The display panel may be associated with a second spectral power distribution and may be configured to generate display light. The optical stack may be configured to present the display light while allowing passthrough of a portion of the ambient light. The optical stack may include a configurable color filter that filters the portion of the ambient light to change the first spectral power distribution based on the second spectral power distribution. Corresponding devices and processes are also disclosed.

Systems and methods for ambient light management for a transparent display are described herein. For example, an illustrative display system may comprise an ambient light sensor configured to detect a first spectral power distribution associated with ambient light. The display system may further comprise a transparent display including a display panel and an optical stack. The display panel may be associated with a second spectral power distribution and may be configured to generate display light. The optical stack may be configured to present the display light while allowing passthrough of a portion of the ambient light. The optical stack may include a configurable color filter that filters the portion of the ambient light to change the first spectral power distribution based on the second spectral power distribution. Corresponding devices and processes are also disclosed.