Abstract:
A stable electrochromic stack is provided that is able to persistently hold a desired optical state. The stable electrochromic stack has at least two states. One state may be, for example, a bleached state in which light may readily pass, and the other state may be a colored state that distorts or interferes with the passage of light. Advantageously, the persistent electrochromic stack holds one or both of the optical states without the application of external power. The persistent time period may extend for days, weeks, or years depending on particular constructions, and on application requirements.
Abstract:
There is shown a method of treating household waste comprising separation, shredding and dewatering steps, as well as detoxifying steps, prior to mixing the household waste with an alkali solution and thereafter mixing the alkali solution and household waste mixture with a dry mixture of cement and aggregate to form a concrete mixture. The concrete mixture can then be used in the construction of building elements or may in turn be used as an aggregate material in future concrete mixtures. Expensive composting steps are thereby avoided and the household waste is handled in an environmentally secure, yet efficient manner.
Abstract:
The invention relates to electro-optic displays and methods for driving such displays. The invention provides (i) electrochromic displays with solid charge transport layers; (ii) apparatus and methods for improving the contrast and reducing the cost of electrochromic displays; (iii) apparatus and methods for sealing electrochromic displays from the outside environment and preventing ingress of contaminants into such a display; and (iv) methods for adjusting the driving of electro-optic displays to allow for environmental and operating parameters.
Abstract:
A vertical screening apparatus in which the board to be screened is reciprocally shuttled into and out of the print zone before and after vertical reciprocation of the flood blades and print squeegees. A mechanism is provided to horizontally locate each board and to jog each board between successive sequences of flood and print strokes. Means are provided for tilting the print squeegee between successive print strokes.