An example device includes a substrate having a first surface, an electrowetting force generation layer above the first surface, and a nanostructure layer formed above the electrowetting force generation layer, the nanostructure layer having nano-fingers formed thereon. The electrowetting force generation layer is to generate an electrical field to selectively move at least one reactant on the nano-fingers of the nanostructure layer.

A display device including a first support plate and an opposing second support plate. A first pixel is positioned between the first support plate and the second support plate. A spacer structure is coupled to the second support plate and associated with the first pixel. The spacer structure allows propagation of light having a first wavelength and prevents propagation of light having a second wavelength.

A display panel includes a light waveguide layer and a first substrate disposed opposite to each other, and further including an electrowetting control layer disposed between the light waveguide layer and the first substrate, the electrowetting control layer including a first electrode layer, a second electrode layer, and a grating layer and an electrowetting layer which are disposed between the first electrode and the second electrode layer, the grating layer and the electrowetting layer are configured to operatively couple light with a set transmittance, a setting direction, and a set wavelength out of the light waveguide layer.

A optical phase shifter is provided for adjusting an optical phase of light propagating therethrough along an optical axis. The optical phase shifter includes first and second transparent slides defining a cavity therebetween. A sheet is received in the cavity and has first and second sides. The sheet includes a rigid inner portion alignable with the optical axis and is moveable along the optical axis between a first position and a second position. A tuning structure is operatively engageable with the rigid inner portion of the sheet to selectively move the rigid inner portion of the sheet along the optical axis so as to adjust the optical phase of light propagating through the optical phase shifter.

A liquid lens can include two or more liquids enclosed in a chamber. The liquid lens can be configured to reduce the chromatic aberration produced when the meniscus formed at the interface of two of the liquids is tilted. This can be accomplished in a number of ways including selecting the liquids to maximize the refractive index difference and minimize the Abbe number difference.

Disclosed is a liquid lens control circuit, which includes a liquid lens including a plurality of individual electrodes disposed in compartmental areas at the same level and a common electrode disposed at a different level from that of the individual electrodes, a voltage control circuit configured to supply voltages to the common electrode and at least one of the individual electrodes in the liquid lens in order to control an interface in the liquid lens, and a capacitance measuring circuit configured to calculate a capacitance between the common electrode and at least one of the individual electrodes in the liquid lens using a switched capacitor.

The present invention provides a circuit for controlling a voltage for driving a liquid lens including a first voltage generator for outputting a first voltage; a second voltage generator for outputting a second voltage having an opposite polarity to the first voltage; a first switch for selecting one of the first voltage and a ground voltage, and transmitting the selected voltage; a second switch for selecting one of the second voltage and the ground voltage, and transmitting the selected voltage; and a third switch for selecting one of a voltage selected by the first switch and the voltage selected by the second switch, and transmitting the selected voltage, wherein the third switch is plural in number, and the first switch is connected in common to the plurality of third switches.

A liquid crystal lens, a manufacturing method thereof, and a display device are disclosed. The liquid crystal lens includes a liquid layer located between a first substrate and a second substrate, the liquid layer includes a liquid crystal layer and a filler layer, the filler layer is filled in a square between the first substrate and the second substrate except the liquid crystal layer; the liquid crystal layer is made of a material different from the filler layer.

An apparatus for manufacture of an electrowetting device is provided. The apparatus includes a first and second support plate feeding system to provide a first and second support plate respectively. The first and second support plate feeding systems include a first and second element respectively. The first and second elements are positioned relative to each other so as to angle the first support plate relative to the second support plate such that the first support plate and the second support plate are brought closer together as the first support plate and the second support plate are fed by the first element and the second element, respectively, so as to provide, during the manufacture of the electrowetting device, a cavity between the first support plate and the second support plate. The apparatus also includes a first and second fluid supply system for supply of a first and second fluid respectively.

A system and method for an electrowetting display device are presented. The electrowetting display device includes a first support plate and a second support plate, A plurality of pixel walls associated with an electrowetting pixel are formed over the first support plate. A color filter is over the electrowetting pixel. The color filter allows propagation of visible light of a first color and prevents propagation of visible light of a second color. In an embodiment, the color filter includes a layer of light-absorbing photoresist that is patterned into a first plurality of regions and a second plurality of regions. Each region in the first plurality of regions has a first optical density and each region in the second plurality of regions has a second optical density so that the color filter has a non-uniform optical density.