Abstract: A frame memory 105 stores the original image data received from a higher-level device 102 via an interface 103. Color reduction processing means receives color reduction rate data through a transfer from an upper-level device 102 or manual setting means such as a switch or jumper settings. Based on this color reduction rate data, the number of colors in the gradation data of the original image is reduced, and the color count of the original image is simulated using the reduced color count. Also included are a timing generating circuit 106 and a gradation voltage generating circuit 107. A gradation voltage selector 108 performs a partial halting of driver operations based on the color reduction rate.

Abstract: A display device displays corrected externally-supplied video signals, and includes plural pixels, a scanning driver and a signal driver which applies display voltages to signal lines coupled to the pixels. The signal driver includes a first converter which converts a format of the externally supplied video signals into a first format, a memory which stores the video signals from the first converter temporarily, a correction circuit which computes correction values based upon the video signals from the first converter and the video signals in the memory and corrects the video signals from the first converter based upon the correction values, and a second converter which converts the first format of the video signals from the correction circuit to a format of the display voltages. The memory stores the correction values also, and the correction circuit corrects the video signals in the memory based upon the correction values in the memory.

Abstract: The present invention provides a liquid crystal display controller device and method which provides for a full and/or partial display with good display quality and/or low power consumption based on the scanning period for an active scan line being dependent upon a number of reference clock pulses. Some embodiments of the present invention include one or more of the following features: keeping the frequency substantially constant for different numbers of active scan lines, allowing change of the frequency due to characteristics of the LCD, displaying gradation with near linear effective voltage characteristics, displaying graduation data with lower power, or displaying a partial or full screen in a mobile device, for example, a cell phone.

Abstract: The present invention provides a technique that is capable of preventing a separation of elements of the display panel of a slim display device in which the bending radius of a flexible printed circuit is small. A flexible printed circuit connects to a first side of the display panel and is bent in the vicinity of the first side, part of which is disposed between the back of a backlight and a holder. The holder has an opening or a depression in the vicinity of the first side of the backlight corresponding to the first side of the display panel. The flexible printed circuit has a portion which is deflected so that the top thereof projects into a space in the opening or the depression in the holder, as viewed in section perpendicular to the first side.

Abstract: A display driver for outputting gradation voltages corresponding to gradation data from an external device to pixels. The display driver includes a generator for generating a plurality of gradation voltages having a plurality of levels based on a reference voltage, and a selector for selecting at least one gradation voltage corresponding to the gradation data from the plurality of gradation voltages generated by the generator. The gradation data includes multi-bits for each color of red, green and blue, and the generator outputs or stops outputting each gradation voltage according to data for color reduction from the external device. The generator stops outputting at least one gradation voltage that is unnecessary for displaying as a result of the color reduction, when the color of the gradation data is reduced according to the data for color reduction.

Abstract: A display apparatus includes a data driver that is common to a main screen and a sub screen, and the data driver applies, to the main screen, a tone voltage corresponding to display data from a CPU, and during a vertical blanking time-period of the main screen, the data driver applies, to the sub screen, a tone voltage corresponding to black data or white data, and also includes a scan driver scans the main screen and scans the sub screen during the vertical blanking time-period of the main screen.

Abstract: The present invention suppresses the increase of consumptive electricity derived from the alternation timing driving of a passive matrix type liquid crystal display device such as an STN system or the like. According to the present invention, the liquid crystal display device which is driven by applying selection voltages to common electrodes during a scanning period of the common electrodes and by applying non-selection voltages during other periods to the common electrodes includes a switching circuit which temporarily short-circuits the common electrode n and the common electrode m during a period shifting from the scanning period of the common electrode n to the scanning period of the common electrode m which succeeds the scanning period of the common electrode n, and makes use of the charge stored in the common electrode n by the application of the selection voltage during the scanning period of the common electrode n for charging the common electrode m.

Abstract: A frame memory 105 stores the original image data received from a higher-level device 102 via an interface 103. Color reduction processing means receives color reduction rate data through a transfer from an upper-level device 102 or manual setting means such as a switch or jumper settings. Based on this color reduction rate data, the number of colors in the gradation data of the original image is reduced, and the color count of the original image is simulated using the reduced color count. Also included are a timing generating circuit 106 and a gradation voltage generating circuit 107. A gradation voltage selector 108 performs a partial halting of driver operations based on the color reduction rate.

Abstract: The present invention suppresses the increase of consumptive electricity derived from the alternation timing driving of a passive matrix type liquid crystal display device such as an STN system or the like. According to the present invention, the liquid crystal display device which is driven by applying selection voltages to common electrodes during a scanning period of the common electrodes and by applying non-selection voltages during other periods to the common electrodes includes a switching circuit which temporarily short-circuits the common electrode n and the common electrode m during a period shifting from the scanning period of the common electrode n to the scanning period of the common electrode m which succeeds the scanning period of the common electrode n, and makes use of the charge stored in the common electrode n by the application of the selection voltage during the scanning period of the common electrode n for charging the common electrode m.

Abstract: A liquid crystal display includes a scanning voltage driver which applies selective scanning voltages to scanning electrodes of a liquid crystal display panel one group of M (an integer of 2 or greater) adjacent scanning electrodes at a time in accordance with M orthogonal function data. A data voltage driver applies to data electrodes of the liquid crystal display panel data voltages selected from M+1 data voltages in accordance with a coincidence number representing a number of coincidences between values of M display data corresponding to the M adjacent scanning electrodes in a current group of scanning electrodes and values of the M orthogonal function data corresponding to the M adjacent scanning electrodes in the current group.

Abstract: The present invention provides a liquid crystal display controller device and method which provides for a full and/or partial display with good display quality and/or low power consumption based on the scanning period for an active scan line being dependent upon a number of reference clock pulses. Some embodiments of the present invention include one or more of the following features: keeping the frequency substantially constant for different numbers of active scan lines, allowing change of the frequency due to characteristics of the LCD, displaying gradation with near linear effective voltage characteristics, displaying graduation data with lower power, or displaying a partial or full screen in a mobile device, for example, a cell phone.

Abstract: A liquid crystal display comprises a liquid crystal display panel having a plurality of scanning electrodes and data electrodes, the data electrodes driving circuit has a latch at a front stage for fetching a display data of two lines for partial driving and a latch at a post stage for storing the display data of two lines. The display data from the latch at the post stage is compared with the scanning function supplied from the scanning driver, one of the voltages at three levels is selected in accordance with the result of the comparison, and the selected voltage is applied to the data electrodes. Further, the data electrode driving circuit has a latch for storing the result of the comparison for a period of one line and a correction voltage is applied to the data electrode in accordance with a value obtained by comparing an output of the latch and the comparison result.

Abstract: It is possible to reduce the thickness and size of a liquid crystal display module and to suppress any display irregularity due to the heat generation of a light source, by providing a liquid crystal display module which is characterized by an upper frame 1 made of a thin stainless steel sheet and a lower frame 2 made of a thin aluminum sheet thereby to reduce the thickness of an intermediate frame 42, and to form the lower frame 2 with cut-away portions 55 and 56, which extend in a direction perpendicular to a back light source 36 over at least the area of a liquid crystal display panel 62 and which are positioned symmetrically to the line perpendicular to the center portion of the back light source 36, cut-away portions 57 and 58, which extend just below the back light source 36 in the longitudinal direction of the back light source 36, and notches 53 and 54 which are positioned below the two end portions of the back light source 36.

Abstract: A liquid crystal display device comprises: a liquid crystal module including liquid crystal display panel having a plurality of liquid crystal picture elements arranged in a matrix form, and driving circuits for applying driving signals to signal electrodes and to scanning electrodes of the liquid crystal display panel, respectively; a control circuit for controlling operations of the liquid crystal module; and a means for inverting polarity of a voltage to be applied to a liquid crystal layer by generating a control signal M' having a period m.tau. which signal inverts the polarity of the voltage to be applied to the liquid crystal layer whenever a clock signal having a period .tau. is counted a predetermined number m/2. However, if a period of a frame frequency is n.tau. and an arbitrary integer is L,(1) m is set to be 2n/(2L-1), or(2) m is set to be n/L and the control signal M' is inverted per said frame period n.tau.