摘要:
In an optical data storage medium with a storage area formed from a transparent, homogenous base material and with a number of optically active structures at one side of the storage area, the optically active structures are diffractive optical elements which can focus a beam of light incident on the storage area on to one or more points in the storage area and/or a redirected beam of light or emitted light radiation from this or these points on to a point outside the optical storage medium. During writing/reading of data in the storage medium, the diffractive optical elements are used for focusing the write/read beam in order to generate a data carrying structure or read data stored in such a data carrying structure, respectively. By exploiting the special optical properties of diffractive optical elements, it is possible to achieve parallel writing/reading of data, possibly in several parallel storage layers in the optical storage medium or randomly distributed therein, the optical storage medium thus providing a genuine volumetric storage and a corresponding genuine volumetric accessing of the stored data.
摘要:
In a method for reducing detrimental phenomena related to disturb voltages in a data storage apparatus employing passive matrix addressing, particularly a memory device or a sensor device, an application of electric potentials conforming to an addressing operation is generally controlled in a time-coordinated manner according to a voltage pulse protocol. In an addressing operation a data storage cell is set to a first polarization state by means of a first active voltage pulse and then, dependent on the voltage pulse protocol, a second voltage pulse which may be a second active voltage pulse of opposite polarity to that of the first voltage pulse, is applied and used for switching the data storage cell to a second polarization state. The addressed cell is thus set to a predetermined polarization state as specified by the addressing operation. The data storage cells of the apparatus are provided in two or more electrically separated segments such that each segment comprises a separate physical address space for the apparatus. In an addressing operation the data are directed to a segment that is selected based on information on prior and/or scheduled applications of active voltage pulses to the segments.
摘要:
A ferroelectric or electret volumetric memory device with a memory material provided in sandwich between first and second electrode layers with stripe-like electrodes forming word lines and bit lines of a matrix-addressable memory array, memory cells are defined in volumes of memeory material in between two crossing word lines and bit lines and a plurality of memory arrays are provided in a stacked arrangement. A stack of memory arrays is formed by tow or more ribbon-like structures, which are folded and/or braided into each other. Each ribbon-like structure includes a flexible substrate of non-conducting material and the electrode layers respectively provided on each surface of the substrate and including the parallel strip-like electrodes extending along the ribbon-like structure. A layer of memory material covers one of the electrode layers whereby each memory array of the stack is formed by overlapping portions of a pair of adjacent ribbon-like structures and crossing in substantially orthogonal relationship.
摘要:
In a ferroelectric data processing device for processing and/or storage of data with passive or electrical addressing a data-carrying medium is used in the form of a thin film (1) of ferroelectric material which by an applied electric field is polarized to determined polarization states or switched between these and is provided as a continuous layer in or adjacent toelectrode structures in the form of a matrix. A logic element (4) is formed at the intersection between an x electrode (2) and a y electrode (3) of the electrode matrix. The logic element (4) is addressed by applying to the electrodes (2, 3) a voltage greater than the coercivity field of the ferroelectric material. Dependent on the polarization state and the form of the hysteresis loop of the ferroelectric material a distinct detection of the polarization state in the logic element (4) is obtained and it may also be possible to switch between the polarization states of the logic element, which hence may be used for implementing a bistable switch or a memory cell. The data processing device according to the invention may be stacked layerwise if the separate layers are separated by an electrical isolating layer and hence be used for implementing volumetric data processing devices.
摘要:
In a method for obviating the effect of disturb voltages in a data storage apparatus employing passive matrix addressing, an application of electric potentials for an addressing operation is according to a voltage pulse protocol. The data storage cells of the apparatus are provided in two or more electrically separated segments each constituting non-overlapping physical address subspaces of the data storage apparatus physical address space. A number of data storage cells in each segment are preset to the same polarization by an active voltage pulse with a specific polarization. In a first addressing operation one or more data storage cells are read by applying an active pulse with the same polarization to each data storage cell and recording the output charge response. On basis thereof the output data in subsequent second addressing operation are copied onto preset data storage cells in another segment of the data storage apparatus, this segment being selected on the basis of its previous addressing history.
摘要:
An optoelectronic camera comprises an objective system formed by a number of optical active structures (L), particularly refractive structures in the form of microlenses or lenslets provided in an array. A detector device (D) is assigned to the lens array and comprises detectors (Dn) formed by sensor elements (E) which define pixels in the optical image. Each detector (Dn) defines a sample of the optical image and optimally all samples are used to generate a digital image. The optoelectronic camera may be realized as a color image camera, particularly for recording images in an RGB system. In a method for digital electronic formatting of an image recorded with the optoelectronic camera, zoom and pan functions are implemented in the camera.
摘要:
A read-only memory is made electrically addressable over a passive conductor matrix, wherein the volume between intersection of two conductors (2; 4) in the matrix defines a memory cell (5). Data are stored as impedance values in the memory cells. The memory cells (5) comprise either an isolating material (6) which provides high impedance or one or more inorganic or organic semiconductors (9), preferably with an anisotropic conducting property. The semiconductor material (9) forms a diode junction at the interface to a metallic conductor (2; 4) in the matrix. By suitable arrangement of respectively the isolating material (6) and semiconductor material (9) in the memory cells these may be given a determined impedance value which may be read electrically and corresponds to logical values in a binary or multi-valued code. One or more read-only memories (ROM) may be provided on a semiconductor substrate (1) which also comprises driver and control circuits (13), to accomplish a read-only memory device. The device may be realized either planar or also volumetrically by stacking several read-only memories (ROM) in horizontal layers (15) and connecting them with the substrate (1) via addressing buses.
摘要:
In a memory and/or data processing device having at least two stacked layers which are supported by a substrate or forming a sandwiched self-supporting structure, wherein the layers include memory and/or processing circuitry with mutual connections between the layers and/or to circuitry in the substrate, the layers the are mutually arranged such that contiguous layers form a staggered structure on at least one edge of the device and at least one electrical edge conductor is provided passing over the edge on one layer and down one step at a time, enabling the connection to an electrical conductor in any of the following layers in the stack. A method for manufacturing a device of this kind includes the steps for adding the layers successively, one layer at a time, such that the layers form a staggered structure, and for providing one or more layers with at least one electrical contact pad for linking to one or more interlayer edge connectors.
摘要:
A method of driving a passive matrix display or memory array of cells comprising an electrically polarizable material exhibiting hysteresis, in particular a ferroelectric material, wherein the polarization state of individual cells can be switched by application of electric potentials or voltages to word and bit lines in the matrix or array.
摘要:
A matrix-addressable ferroelectric or electret memory device and a method of operating are explained. The method includes applying a first plurality of voltage difference across a first and a second set of electrodes in the memory when data are read, and applying a second plurality of voltage differences when data are refreshed or rewritten. The first and second plurality of voltage differences correspond to sets of potential levels comprising time sequences of voltage pulses. At least one parameter indicative of a change in a memory cell response is used for determining at least one correction factor for the voltage pulses, whereby the pulse parameter is adjusted accordingly. The memory device comprises means for determining the at least one parameter, a calibration memory connected with means for determining the correction factor, and control circuits for adjusting pulse parameters as applied to read and write operations in the memory device.