A switchable image capturing system is provided. Through modulating light by an electro-optical switch, the light intake received by the lens assembly and the image sensor may be changed. Specifically, when the electro-optical switch receives a positive voltage, the electro-optical switch obstructs the light so that the lens assembly and the image sensor are not able to image by receiving the light; when the electro-optical switch receives a negative voltage, the electro-optical switch allows the light to pass through so that the lens assembly and the image sensor is able to image by receiving the light. Through the configuration in the aforementioned statements, the image time of the image sensor may be controlled to interrupt or continue filming according to the user's needs.

Herein are described two-dimensional metal organic frameworks (2D MOFs). The 2D MOFs includes a plurality of multivalent metals or metal ions and a plurality of multidentate ligands arranged to form a crystalline structure having a lateral size of at least about 2.5 μm and a thickness of less than about 5 nm. Herein are also described methods for preparing the 2D MOFs. The 2D MOFs can be used, for example, in electrochromic devices such as smart windows and flexible displays.

A system and method for color correction in an electrochromic device includes applying a stepped voltage profile to the electrochromic device in a high-transmission state to achieve a desired low-transmission state. Each step of the stepped voltage profile is at a step difference of about 0.01 volts to about 0.5 volts from an adjacent step with each successive step being at a varying voltage level and each of the steps is held for a time period from about 0.1 seconds to about 10 seconds. At the desired low-transmission state, the system and method include applying a reverse bias voltage from about 0.01 volts to about 0.5 volts for about 0.01 seconds to about 10 seconds to color correct the low-transmission state.

A system and method for color correction in an electrochromic device includes applying a stepped voltage profile to the electrochromic device in a high-transmission state to achieve a desired low-transmission state. Each step of the stepped voltage profile is at a step difference of about 0.01 volts to about 0.5 volts from an adjacent step with each successive step being at a varying voltage level and each of the steps is held for a time period from about 0.1 seconds to about 10 seconds. At the desired low-transmission state, the system and method include applying a reverse bias voltage from about 0.01 volts to about 0.5 volts for about 0.01 seconds to about 10 seconds to color correct the low-transmission state.

A reflective liquid crystal display device includes: first to fourth substrates spaced apart from and parallel to each other; a first stack including a first pixel electrode, a first alignment layer, a first common electrode, a second alignment layer and a first cholesteric liquid crystal layer between the first and second alignment layers; a second stack including a second pixel electrode, a third alignment layer, a second common electrode, a fourth alignment layer and a second cholesteric liquid crystal layer between the third and fourth alignment layers; a third stack including a third pixel electrode, a fifth alignment layer, a third common electrode, a sixth alignment layer and a third cholesteric liquid crystal layer between the fifth and sixth alignment layers; and a fourth stack including a first mode electrode, an ion storing layer, an electrolyte layer, an electrochromic layer and a second mode electrode sequentially on the first substrate.

An EC element whose coloring unevenness due to concentration unevenness is reduced by bringing the ratio of red and green wavelength ranges of a colored form of an anodic EC compound close to the ratio of red and green wavelength ranges of a colored form of a cathodic EC compound.

A method of testing one or more electrochromic devices and/or wiring during commissioning is disclosed. The method can include providing one or more electrochromic devices and at least one controller. The controller can be electrically connected to the one or more electrochromic devices. The method can further include setting a commissioning voltage for the one or more electrochromic devices. The commissioning voltage can be no more than 2 V. The method can further include sending from the at least one controller, the commissioning voltage to each of the one or more electrochromic devices to change the one or more electrochromic devices from a first transmission state to a second transmission state.

A method of testing one or more electrochromic devices and/or wiring during commissioning is disclosed. The method can include providing one or more electrochromic devices and at least one controller. The controller can be electrically connected to the one or more electrochromic devices. The method can further include setting a commissioning voltage for the one or more electrochromic devices. The commissioning voltage can be no more than 2 V. The method can further include sending from the at least one controller, the commissioning voltage to each of the one or more electrochromic devices to change the one or more electrochromic devices from a first transmission state to a second transmission state.

An electrochromic device includes an electrochromic medium including a cathodic component, an anodic component, a hydroquinone, and a solvent.

An electro-optic element includes a first substrate defining first and second surfaces and a second substrate defining third and fourth surfaces. A first electrically conductive layer is disposed on the second surface and a second electrically conductive layer is disposed on the third surface. An electrochromic medium is disposed in a cavity between the first and second substrates, the electrochromic medium including an anodic component and a cathodic component. At least the anodic component is configured to reversibly attenuate transmittance of light having a wavelength within a predetermined wavelength range when in an electrochemically activated state. The anodic component includes a substituted ketal phenazine compound.