Abstract:
In active semiconductor backplane (3), for example for a smectic liquid crystal cell, which comprises an array of electronic or elctrical elements in a first region (4), logic elements for addressing said array in a second region spaced from the first, and conductors coupling said first and second regions, the first and second regions are sufficiently widely spaced (21, 22) (providing a "glue lane") to permit the presence of an adhesive sealing strip therebetween without substantial contact with the first and/or second regions, even when an opposed substrate is sealed thereto. The backplane may comprise spacers (25, 26) in the first region and/or glue lane.
Abstract:
An electro-optic device such as a smectic liquid crystal cell (1) with an active semiconductor backplane (3) is mounted on a hybrid substrate (2), for example of alumina or silica. Other active or passive electronic or optical components may also be mounted on the substrate, and interconnected by conductive tracks, for example by wire bonding (17), and the substrate itself may be mounted on a printed circuit board. The substrate may comprise a heat sink. The arrangement facilitates the safe connection of the liquid crystal cell and good optical alignment thereof.
Abstract:
Coloring layers (R, G, B) of a color filter are arranged in a delta array. Data lines (212) for applying voltage to the sub-pixels are connected via TFDs (220) repeatedly in a predetermined order to pixel electrodes (234) of the sub-pixels corresponding to each color. The pixel electrodes (234) connected commonly to each data line (212) are located on the same side as the data line (212). Consequently, the potential of a sub-pixel in a specific color is influenced equally from the potentials of the sub-pixels of the other colors.
Abstract:
A method is provided to prevent the degradation and irregularity in performance of a transistor due to surface irregularities, particularly impurity segregation on the surface irregularities, of a thin polysilicon film formed by laser annealing. The method comprises (1) removing projections and impurity segregation from the surface of a laser-annealed thin polysilicon film chemically and mechanically, and (2) performing crystal growth by a heat treatment and smoothing the surface while removing the extraneous matter from the surface.
Abstract:
A thin film of ferroelectric layered superlattice material in a flat panel display device is energized to selectively influence the display image. In one embodiment, a voltage pulse causes the layered superlattice material to emit electrons that impinge upon a phosphor, causing the phosphor to emit light. In another embodiment, an electric potential creates a remanent polarization in the layered superlattice material, which exerts an electric field in liquid crystal layer, thereby influencing the transmissivity of light through the liquid crystal. The layered superlattice material is a metal oxide formed using an inventive liquid precursor containing an alkoxycarbolyxate. The thin film thickness is preferably in the range of 50-140 nm, so that polarizability and transparency of the thin film is enhanced. A display element may comprise a varistor device to prevent cross-talk between pixels and to enable sudden polarization switching. A functional gradient in the ferroelectric thin film enhances electron emission. Two ferroelectric elements, one on either side of the phosphor may be used to enhance luminescence. A phosphor can be sandwiched between a dielectric and a ferroelectric layer to enhance emission.
Abstract:
A reflection liquid crystal display device comprising only one polarization film, wherein the twist angle of a nematic liquid crystal ranges from 0 DEG to 90 DEG , the relationship between the difference between the indexes of birefringence DELTA nLC, the thickness of the liquid crystal layer dLC, and the retardation of the phase plate RF is expressed by DELTA nLC.dLC=0.20 to 0.30 mu m, RF- DELTA nLC.dLC=-0.20 to -0.05 mu m. Defining the direction in which a nematic liquid crystal is twisted toward a lower substrate when viewed from above an upper substrate is positive, and letting the direction of the major axis of the liquid crystal molecule the nearest to one of upper and lower substrates be represented PHI LC, the direction of the phase lagging axis of the phase plate be represented PHI F, and the direction of the absorbing or transmitting axis of the polarization film be represented PHI P, the relationship between the directions is expressed by PHI F- PHI LC=-40 DEG to -25 DEG , PHI P- PHI F=+50 DEG to +80 DEG or PHI F- PHI LC=+65 DEG to +105 DEG , PHI P- PHI F=-60 DEG to -90 DEG . Therefore, bright white can be displayed and a nonchromatic high-contrast image can be also displayed.
Abstract:
The invention relates to an active matrix liquid crystal display in which picture elements are arranged in lines and columns of a matrix and activated by way of line electrodes and column electrodes. To improve and expand the possibilities for image representation without an increase in the number of lines and columns to be activated, the picture elements (25) are subdivided into sub-elements (26, 27, 28) having corresponding sub-element electrodes (29) which are each connected via controllable switches (32) with the column electrode (33) assigned to the picture element (25). The controllable switches (32) are connected on the control side via a shared picture element control device (34) with the line electrode (35) assigned to the picture element (25). From a control signal (40) supplied to it via the line electrode (35) the picture element control device (34) generates connecting signals (44) which differ in time and place for the different switches (32) such that these sequentially transmit different time-sequential grey tone levels of a grey tone signal (38) applied at the level of the column electrode (33) to the sub-element electrodes (29).
Abstract:
A liquid crystal display of which the display operation is controlled by an electric field parallel to the substrate plane, of which the angle of view is equivalent to that of a cathode-ray tube and which has an excellent uniform luminance with little display irregularity. The display is provided with a pair of transparent substrates opposed to each other through a liquid crystal, means for controlling the initial orientation of the liquid crystal, and a pixel electrode (PX) and a counter electrode (CT) spaced from each other in each pixel region of the surfaces on the liquid crystal sides of the transparent substrates, and controls the quantity of light transmitted through the liquid crystal between the pixel electrode (PX) and the counter electrode (CT) in each pixel region by the electric field between the electrodes (PX) and (CT). The display is provided, in the light-transmitting region in each pixel region, with a region (A) where the angle between the direction of electric field between the pixel electrode (PX) and the counter electrode (CT) and the direction of initial orientation and another region (B) where the angle between the direction of electric field and the direction of initial orientation is different from that in the region (A).
Abstract:
In an electrode means for addressing of a functional element (7) a layer (4) of electrical isolating material is provided between first and second electrodes (1, 2) intersecting without direct physical or electrical contact and forming a bridge structure. Over both electrodes (1, 2) an electrical conducting or semiconducting contact layer (10) is provided and contacts both electrodes (1, 2) electrically. In an electrode means with detecting, information storing and/or information indicating function an electrically addressable functional element (7) is provided adjacent to or in the intersection between the electrodes (1, 2). In an electrode device (13) comprising two or more electrode means (26) of this kind, the electrodes (1, 2) form patterned layers of row and column electrodes in a 2-dimensional matrix, wherein the contact layer (3) forms a patterned or integrated global layer and functional elements (7) which each registers with an electrode intesection in the matrix, are provided in one or more patterned or non patterned layers. Use in an optical or electronic camera, in a chemical camera, in an electrically addressable memory device or electrically addressable data processing device, and in an electrically addressable display device.
Abstract:
A reflective liquid crystal display such as an AMLCD includes an array of reflective pixels located over a surface of a silicon substrate, with light transmissive regions being located between the reflective pixels. The structure includes two metal layers between the reflective pixels and the silicon substrate surface, with segments of one metal layer extending in a first direction to form row electrodes of the LCD and segments of the other metal layer extending in a second direction substantially perpendicular to the first to form column electrodes of the LCD. In order to block light that would otherwise pass through light transmissive regions between the reflective pixels. In this manner, a light-blocking function is provided withouth the need for a separate blocking or shading metal layer.