Abstract: A display device (1) comprising: a liquid crystal display (2) having pixels (8) which are arranged in columns C and rows R; and a gate driving arrangement (4) for activating the pixels (8) of rows (R) in dependence on a row scanning scheme; a source driving arrangement (3) for providing column voltages representing the respective image data, a number of buffers (40) depending on the number of grey levels for supplying the respective voltage levels to the columns (C), a switching unit (31) for selecting a voltage level which corresponds to the grey level to be displayed; and a control unit (32) for controlling the buffers (40). For reducing the power consumption, an analyzing unit (39) is provided which analyzes the image data to be displayed such that the control unit (32) can determine the number of required buffers in dependence on the number of grey levels to be displayed and can switch off any unused buffers.

Abstract: A display device includes pixels arranged in columns and rows, in which the pixels of a row can be selected by means of a row voltage supplied via control lines, and column voltages that correspond to the image data of the selected pixel to be displayed can be supplied via data lines, wherein mutually adjoining pixel groups arranged in a row or column, consisting of adjoining pixels of a row or column, are connected to adjoining control lines or data lines, as applicable, in alternation.

Abstract: The present invention provides a driving circuit capable of reducing power consumption in an amplifier for outputting a target voltage. A driving circuit for driving a capacitive load Ccol of a display device, comprising: driving signal supplying means (10) for supplying a driving signal Vin having a target voltage to be applied; an amplifying stage (20) for receiving the driving signal Vin and selectively outputting the driving signal Vin to the capacitive load Ccol; and a pair of current sources Ipcp, Ipcn for selectively supplying a positive current and a negative current to the capacitive load Ccol, respectively during their on-states. The driving circuit repeats a repetitive operation including a pre-operation where any one of the current sources Ipcp, Ipcn is switched ON in accordance with the driving signal Vin and then switched OFF and a post-operation where the amplifying stage (20) is switched to a state for outputting the driving signal Vin to the capacitive load Ccol after the pre-operation.

Abstract: A display device (1) comprising: a liquid crystal display (2) having pixels (8) which are arranged in columns C and rows R; and a gate driving arrangement (4) for activating the pixels (8) of rows (R) in dependence on a row scanning scheme; a source driving arrangement (3) for providing column voltages representing the respective image data, a number of buffers (40) depending on the number of grey levels for supplying the respective voltage levels to the columns (C), a switching unit (31) for selecting a voltage level which corresponds to the grey level to be displayed; and a control unit (32) for controlling the buffers (40). For reducing the power consumption, an analyzing unit (39) is provided which analyzes the image data to be displayed such that the control unit (32) can determine the number of required buffers in dependence on the number of grey levels to be displayed and can switch off any unused buffers.

Abstract: The invention relates to a display device (2) with pixels (8) arranged in columns m and rows n, wherein the pixels of a row n can be selected by a row voltage (VROW) supplied through control lines (6), and column voltages (VCOL) that correspond to the picture data of the selected pixels to be displayed can be supplied through data lines (7). The invention further relates to a method of controlling such a display device. To obtain a display device in which an optimized picture quality is achieved in combination with a long battery life and low manufacturing costs, it is proposed to connect the mutually adjoining pixel groups arranged in one row or column, said groups comprising adjoining pixels of one row or column, to adjoining control lines (6n, 6n+1) or data lines (7m, 7m+1) in alternation. This renders it possible to control such a display device by a conventional control method.

Abstract: The invention describes a display device for displaying information, comprising a display unit 1 with a plurality of columns C and rows R and a display driver 2. Further the invention describes a display driver 2 controlling a display unit 1 with storing means 3 for providing image information to the columns C of a display. The invention relates also to a terminal for mobile communication with a display device, having a display unit 1 and a display driver 2. To achieve a flexible multiplex rate of the display a control device 4 is arranged to switch off a definable number of rows R of the display depending on a state signal which contains the state information of the rows R. By this the multiplex rate is freely programmable, so in a partial mode (N/{overscore (P)}=0) the multiplex rate is reduced and by this the power consumption is reduced. Further it is possible to enable the rows or the groups of rows in a none consecutive order.

Abstract: The invention describes a display device for displaying information, comprising a display unit 1 with a plurality of columns C and rows R and a display driver 2. Further the invention describes a display driver 2 controlling a display unit 1 with storing means 3 for providing image information to the columns C of a display. The invention relates also to a terminal for mobile communication with a display device, having a display unit 1 and a display driver 2. To achieve a flexible multiplex rate of the display a control device 4 is arranged to switch off a definable number of rows R of the display depending on a state signal which contains the state information of the rows R. By this the multiplex rate is freely programmable, so in a partial mode (N/{overscore (P)}=0) the multiplex rate is reduced and by this the power consumption is reduced. Further it is possible to enable the rows or the groups of rows in a none consecutive order.

Abstract: A voltage converter, for converting an input voltage (U.sub.i) to an output voltage (U.sub.0), includes a plurality of cascaded voltage multipliers (VM1-VMN) having clock inputs, a control circuit (CNTRLG) for supplying clock signals to the clock inputs, for controlling the voltage multipliers (VM1-VMN). The control circuit (CNTRLG) includes circuitry (SL) for activating selected ones from the plurality of the voltage multipliers (VM1-VMN). The clock signals can be programmed to a part of the voltage multiplier to a non-active state. The voltage converter can, in addition, be provided with monitoring circuitry (MN) coupled between the output of the voltage converter and an input of the circuitry (SL). The monitoring means (MN) measures the output voltage (U.sub.0) in order to take a decision about the required number N of active voltage multipliers (VM1-VMN).