54results about How to "Uniform discoloration" patented technology

A tamper evident closure (1) includes a housing (5) containing a blister pack (2) and a substrate (3), wherein the blister pack (2) contains a first reagent which is visible prior to first opening and the substrate (3) contains a second reagent. First opening of the closure ruptures the blister pack thereby exposing the first reagent to the second reagent and effecting a reaction that causes a visual change that signals the closure has been opened. The tamper evident closure of the present invention is primarily intended to be used as an anti-counterfeit measure on a spirit or pharmaceutical bottle. In the preferred embodiment, the closure incorporates a liquid that when brought into contact with a reagent chemical contained in an absorbent pad, effects an irreversible color change. This color change will indicate to a consumer the bottle has been previously opened or tampered with. The design makes it very difficult for a counterfeiter to cover up or eradicate the visible effects. In particular, the only way a counterfeiter could do this would be to put in a replacement blister and an absorbent pad. Filling a blister pack with a liquid is a highly specialist task which makes replication very difficult. The ability to control the color change to complement the branded goods provides a way of building up consumer recognition of the product and thereby establishing confidence in those products that carry the tamper evident closure of the present invention.

The invention provides a solar photovoltaic electrochromic device, which comprises a semitransparent thin film solar battery substrate, an electrochromic solution and a transparent nonconductive substrate, wherein the electrochromic solution is positioned between the transparent nonconductive substrate and the semitransparent thin film solar battery substrate; the semitransparent thin film solar battery substrate comprises a transparent substrate and a plurality of thin film solar batteries; and an anode and a cathode of each thin film solar battery are simultaneously taken as an anode and a cathode of the solar photovoltaic electrochromic device. A driving voltage required by the electrochromic solution is low, so the thickness of an intrinsic layer of each thin film solar battery can bereduced so as to increase the transmittance of the solar photovoltaic electrochromic device. In addition, the solar photovoltaic electrochromic device can control current output provided by the thin film solar batteries by adding the configuration of an output switch connected with the thin film solar batteries.

The invention discloses a photothermal responsive intelligent energy-saving composite film, which is composed of reversible photochromic substances containing spiropyrans and reversible thermochromic substances containing vanadium dioxide bases. The intelligent energy-saving composite film can be used to prepare one or more layers of alternately compounded color-changing films, which integrates functionality and decoration, and is suitable for building energy-saving needs in most areas of my country, and can be widely used in building doors, windows and automobiles. Safety glass and agricultural greenhouse film and other fields. The intelligent energy-saving composite membrane material of the present invention is based on photothermal response technology, has good discoloration effect, good anti-aging performance, good stability, and can reduce energy consumption and carbon emissions, and has a very broad market prospect.