摘要:
An image is updated on a bi-stable display (310) such as an electrophoretic display by providing separate scaling functions (SF1, SF2) for scaling a duration of a reset pulse (R) and a duration of a driving pulse (D) in a drive waveform based on temperature (335). An absolute value of a slope with varying temperatures of the scaling factor (SF1) for the reset pulse (R) is significantly greater than that of the scaling factor (SF2) for the driving pulse (D), while both scaling factors increase with decreasing temperature. Image update time (IUT) is significantly reduced at lower temperatures, while a range of variation of IUT across all temperatures is also reduced. Scaling functions (SF3, SF4) may also be used for scaling a duration of a help reset pulse (H) and/or a duration of one or more shaking pulses (SH1, SH2).
摘要:
The invention relates to a 3 D display. The 3 D display comprises suspended particle devices with a suspension of elongated particles that align at a predetermined angle with incoming light beam. The display will allow information to be separated relevant to the left and right eye. An electronically controllable set of suspended particle devices adjusts the deflection angle of the outcoming light beam.
摘要:
Driver circuitry of each pixel provides pixel drive currents to respective LED display elements of the pixels of a display. An output transistor arrangement for each column drive circuit within a pixel has a plurality of output transistors (70, 72, 74) in parallel, and one or more of these are selected in order to provide desired output characteristics. Thus, the output of each column drive circuit can be tuned to provide desired output characteristics. In order to select an output transistor, fusible links of non selected transistors may be broken, or further transistors may connect selected transistors to a gate control line while non-selected transistors are connected to a de-select line.
摘要:
A display device, for example a liquid crystal display device (1), and driving method are provided that avoid the need to provide the display device with display data (e.g. video) containing individual display settings for each pixel. The display device comprises an array of pixels (21-36, 71a-79d, 121-136) and an array of processing elements (41-48, 71-79, 141-148), each processing element being associated with a respective pixel or group of pixels. The processing elements (41-48, 71-79, 141-148) perform processing of compressed input display data at pixel level. The processing elements (41-48, 71-79, 141-148) decompress the input data to determine individual pixel settings for their associated pixel or pixels. The processing elements (41-48, 71-79, 141-148) then drive the pixels (21-36, 71a-79d, 121-136) at the individual settings. A processing element may interpolate pixel settings from input data allocated to itself and one or more neighbouring processing elements. Alternatively, the processing elements may have knowledge of the pixel locations of pixels associated with it, and use this information to determine whether one or more of its pixels needs to be driven in response to common input data received by the plural processing elements.
摘要:
A pixel having an upper substrate and a base carrier disposed opposite each other; a dielectric fluid with dispersed electrophoretic particles filled in a gap between the upper substrate and the base carrier; a wall disposed on at least one of the upper substrate and the base carrier between adjacent pixels, preventing migration of the electrophoretic particles between the adjacent pixels; a surrounding electrode disposed in proximity to the wall and extending substantially parallel to an interior surface of the wall; and a facilitating structure positioned along an inner surface of the surrounding electrode, and having a curved inner surface, wherein the facilitating structure is electrically floating relative to the surrounding electrode. The pixels may be used with particles that are colored, black white, and/or reflective. The pixels may incorporate color filters therein.
摘要:
The invention relates to a display device (6;6′) comprising a display (2) having a plurality of display pixels (3;3′) with light emitting elements (LED) and at least a first drive element (T1) and a second drive element (T2) for driving said light emitting elements (LED) in accordance with an analogue data signal, representing at least one frame in a range from low to high overall light emission states for said display (2). The display device (6;6′) further comprises a display controller (10) having a data input (9) for the analogue data signal, a sensing unit (16) adapted to evaluate the overall light emission state of said frame and an output (13) for generating at least one sparkling signal for the one or more display pixels (3;3′) having a high light emission state (18) exceeding a sensed low overall light emission state of said frame. The display controller (10) is arranged to individually control said first drive element (T1) and said second drive element (T2) by said sparkling signal such that said one or more display pixels (3;3′) having said high light emission state are driven by at least one of said drive elements (T1,T2) in a sparkling light emission state (18′;18″) exceeding said high light emission state (18).
摘要:
A drive method is provided for a display device using the movement of charged particles with a pixel area, with each pixel having first and second drive electrodes (20,23; 22) and a pixel electrode (26). The method comprises a reset phase to move the particles in each pixel towards the first drive electrode (20,23), a pixel data loading phase, to cause selected particles either to stay in the vicinity of the first drive electrode (20,23) or move towards the pixel electrode (26), and a drive phase to distribute the particles which have moved towards the pixel electrode over the pixel electrode (26).The address phase is line-by-line but can be made short, and the other phases can be carried out in parallel for all pixels, saving time.
摘要:
In a display device comprising a first substrate having at least one transparent, first picture electrode of a first material, a second substrate comprising at least one second picture electrode of a second material which, jointly with the picture electrode on the first substrate and an intermediate opto-electronic material, defines a pixel, and means for supplying electric voltages to the picture electrodes, the work function between the two picture electrodes is decreased in that at least one of the picture electrodes is coated with at least one layer of conducting material, or a layer of a material comprising a dipole.
摘要:
In a liquid crystal display device, the dielectric constants (∈) and resistivities (&rgr;) of the liquid crystal material and the layers of orienting material have such values that the liquid crystal display device can be driven by means of a DC voltage.
摘要:
A device and method for controllably locally altering the magnetization direction in a body of magnetic material, whereby a layer of at least one of non-metallic material and a semi-metallic material is disposed on a surface of the body, on which layer is provided a body of magnetic material having a fixed magnetization direction, whereby both bodies of magnetic material are magnetically coupled across the interposed layer, the nature of this magnetic coupling being locally alterable by means of locally subjecting the layer to a controllable electric field.