Abstract: A two-way speaker includes: a frame having a space for accommodating parts; a yoke partitioning the space of the frame vertically and having a lower surface and a side wall; a first speaker unit disposed below the yoke and having a magnet, a top plate, a voice coil, and a diaphragm; a protector disposed below the first speaker unit and protecting the diaphragm; a second speaker unit disposed above the yoke and having a magnetic circuit and a flexible-printed coil membrane (F-PCM) diaphragm having a coil pattern formed on a polymer film; and a sound emission yoke attached to an upper surface of the second speaker unit.

Abstract: As for a method for manufacturing a light valve and a light valve manufactured thereby of the present invention, the light valve is composed of a film 1 in which a light-polarizing suspension 3, containing: 5 to 20 wt % of light polarization variable particles 4 showing light polarization characteristics and having a size of 0.2 to 0.5 ?m; 2 to 10 wt % of a dispersion aid; and 80 to 93 wt % of a suspension agent which is a plasticizer, is dispersed in the form of fine droplets 5 in a polymer resin 2 having excellent adhesive strength to a substrate 9, wherein the ratio of the droplets 5 and the polymer resin 2 is 0.5 to 1:1, the polymer resin 2 is polyvinyl butyral, and regarding the suspension agent constituting the light-polarizing suspension 3, at least one plasticizer among trioctyl trimellitate- or trioctyldecyl trimellitate-based plasticizers is used as the suspension agent.

Abstract: The present invention relates to a testing device for a variable light transmittance window, and a testing device for a variable light transmittance window according to one embodiment of the present invention comprises: a light source unit for irradiating light to a variable light transmittance window to measure optical characteristics of a suspended particle device (SPD) film; a detection unit for detecting the light irradiated from the light source unit and transmitted through the variable light transmittance window and outputting an electrical signal by means of the detected light; an AC power supply unit for supplying AC power to the variable light transmittance window; and a terminal for calculating the optical characteristics of the light transmittance variable window by using the electrical signal output from the detection unit.

Abstract: A sealed double glazing unit having an outer pane with a countersunk hole punched in a corner thereof, and an inner pane with a hole punched in a corner thereof, opposed to the countersunk hole in the outer pane. A generally cylindrical liner is inserted into the countersunk hole in the outer pane, a bottom of the liner extending into, without passing through, the countersunk hole in the outer pane. A glazing unit is secured to a supporting member by a fixing member which is fixed through the liner, and a sealing member engages the holes in the inner and outer panes. This sealing member includes a guide ring having the same diameter as the diameter of the bottom of the liner, with a front end of the guide ring extending into the countersunk hole and abutting against the bottom of the liner.

Abstract: A film for a light valve is made by phase separation of a mixture comprising a homogeneous polymeric solution and a liquid suspension of light-polarizing particles. Uniform liquid-suspension droplets in a polymeric matrix are formed by phase separation processing, e.g., by polymerization or solvent evaporation. Such simple, one-step processing results in cost reduction in display and window applications. Sealing problems of conventional light valves are alleviated.