Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.

Aspects of this disclosure concern controllers and control methods for applying a drive voltage to bus bars of optically switchable devices such as electrochromic devices. Such devices are often provided on windows such as architectural glass. In certain embodiments, the applied drive voltage is controlled in a manner that efficiently drives an optical transition over the entire surface of the electrochromic device. The drive voltage is controlled to account for differences in effective voltage experienced in regions between the bus bars and regions proximate the bus bars. Regions near the bus bars experience the highest effective voltage.

The present disclosure describes one or more communities of components (e.g., comprising one or more sensors and/or transceivers) that are configured to automatically locate and/or self-locate their members. The community of components includes a plurality of stationary components, and may include at least one transitory component.

The present disclosure describes one or more communities of components (e.g., comprising one or more sensors and/or transceivers) that are configured to automatically locate and/or self-locate their members. The community of components includes a plurality of stationary components, and may include at least one transitory component.

According to one embodiment, a color changing display includes a housing, a cover cooperatively coupled to the housing, a light panel, and a color display panel. The light panel and the color display panel are positioned between the housing and the cover. The light panel and the colored display panel are each selectively activated to operate in at least one of: a reflective mode, a transmissive mode, and a transflective mode.

According to one embodiment, a color changing display includes a housing, a cover cooperatively coupled to the housing, a light panel, and a color display panel. The light panel and the color display panel are positioned between the housing and the cover. The light panel and the colored display panel are each selectively activated to operate in at least one of: a reflective mode, a transmissive mode, and a transflective mode.

An electrochromic element, includes: a pair of electrodes (3, 5); and an electrochromic layer (7) disposed between the pair of electrodes (3, 5), the electrochromic element being controlled in transmittance by pulse width modulation, in which: the electrochromic layer (7) contains at least one of two or more kinds of anode electrochromic materials, or two or more kinds of cathode electrochromic materials; and all of one of the anode electrochromic materials and the cathode electrochromic materials have an equal molecular length, or have a molecular length ratio of (large molecular length)/(small molecular length) of 1.4 or less, the electrochromic element being such that even when a driving environment temperature changes, its gradation can be controlled under a state in which its absorption spectrum is retained.

There are provided methods for driving an electro-optic display having a plurality of display pixels, a such method includes detecting a white-to-white graytone transition on a first pixel; and determining whether a threshold number of cardinal neighbors of the first pixel are not making a graytone transition from white to white, or if the first pixel is a color pixel, and apply a first waveform.

There are provided methods for driving an electro-optic display having a plurality of display pixels, a such method includes detecting a white-to-white graytone transition on a first pixel; and determining whether a threshold number of cardinal neighbors of the first pixel are not making a graytone transition from white to white, or if the first pixel is a color pixel, and apply a first waveform.

There are provided methods and apparatus for driving an electro-optic display. In an electronic color display including an active matrix of pixels and an electro-optic medium, the method comprises receiving an input image, processing the input image to create color separation cumulate, and using a threshold array to process the color separation cumulate to generate output colors for the electronic color display. In many instances the color gamut of the input image and the color gamut of the electronic color display are different.