Abstract: A display device is formed by a matrix of surface-stabilized bi-stable ferroelectric liquid crystal elements each being separately settable by a matrix driver. To provide brightness control or color in the display, all the elements of the matrix are set in accordance with a portion of a signal for display and the amount of light passing through the matrix for that setting is controlled in accordance with the binary significance of the respective portion of the signal. This control is produced by varying one of the activation duration or intensity of a light source, such as sets of fluorescent tubes in accordance with the binary significance of the brightness information in the input signal. Half of the frame time (T) is used for the numerous setting operations on the matrix of elements and half is used for the backlighting operations of the various settings.

Abstract: A method of manufacturing a color filter for a liquid crystal cell comprises forming a plurality of patterns, each of a respective dye intermediate material, on a carrier element. The patterns of dye intermediate materials are then brought into contact with a substrate layer, supported on a glass substrate, under the application of heat and pressure. The substrate layer, such as a polyacrylonitrile layer, contains free acid groups which interact with the dye intermediate materials to form the colors of the color filter in the substrate layer. The method permits the actual formation of the colors on the substrate to be effected in a single alignment step, minimizing wastage of the relatively expensive glass substrates. Furthermore, as the dyes providing the colors of the filter are chemically part of the substrate layer, they are very resistant to leaching by the liquid crystal materials.

Abstract: A liquid crystal device comprises backlighting means to provide illumination from the rear for a liquid crystal panel. The backlighting means has a layer of light-transmitting material formed with a prismatic region at one edge and a plurality of light sources of differing chromatic output, located adjacent the prismatic region.

Abstract: A balance weight for counterbalancing vehicle wheels having a rim flange and a protruding lip to receive the weight composed of a body having a mass of heavy metal and a clip or adhesive to position the weight on the wheel. The body has a front wall facing outwardly from the wheel and at least one cutout area is provided on the front wall for receiving an additional weight. The additional weight is held in the cutout area by the walls. The additional weight can be adhesively secured to the first weight.

Abstract: An electronic apparatus and a method for dynamically counter-balancing vehicle wheels with balance weights of a single, pre-selected mass. The apparatus is characterized by a device for determining the magnitude and the location on the inside and outside rim flanges of the subject wheel at which a weight of the determined magnitude could be placed to provide the moment required to achieve a counter-balanced condition, an arithmetic unit for operating upon said position and magnitude data to compute the positions on the inside and outside rim flanges at which one each of said balance weights should be placed to provide a resultant counter-balancing moment equal to that required to balance the wheel when using only a single weight of the determined magnitude on each rim flange, and a means for visually displaying the positions on the rim flanges at which such balance weights are to be affixed in order to balance the wheel.