Patent application number | Description | Published |
20080297673 | Liquid Crystal Display Device - A liquid crystal display device included in a compact portable device reduces burden imposed on a driver circuit for driving counter electrodes and produces images having preferable quality. The liquid crystal display device includes liquid display element and liquid crystal driving circuit. The liquid crystal driving circuit drives two counter electrode signal lines during one scanning period for driving one scanning signal line. Counter signals having different polarities are supplied to the two counter signal lines. Since the number of pixels operated by one counter electrode signal line is decreased to half, burden imposed during drive of counter electrodes is reduced. | 12-04-2008 |
20090058783 | LIQUID CRYSTAL DISPLAY DEVICE - LCD device including: a first LCD panel for displaying an image in a transmission mode; a second LCD panel for displaying an image in a reflection mode; and a power supply circuit for supplying a first counter voltage for displaying in the transmission mode to a first counter electrode of the first LCD panel and a second counter voltage for displaying in the reflection mode to a second counter electrode of the second LCD panel, wherein the first counter voltage and the second counter voltage are at voltage levels mutually different from one another. | 03-05-2009 |
20090102822 | Display Device - The present invention provides an integral-type liquid crystal display module having a first display panel and a second display panel which can use a display panel of high resolution as the second display panel. The display device includes a first display panel, a second display panel, and a first flexible printed circuit board which connects the first display panel and the second display panel. Here, the first display panel includes display drive means. Video lines of the second display panel are connected with the display drive means through connection lines for video lines of the first flexible printed circuit board. Further, the second display panel includes scanning line drive means which supplies drive voltages to scanning lines of the second display panel. | 04-23-2009 |
20090109360 | Liquid Crystal Display Device - The present invention provides a liquid crystal display device used in miniaturized portable equipment which exhibits favorable display quality while decreasing a load applied to a driver circuit which supplies a video signal line to pixel electrodes. In a liquid crystal display device which includes liquid crystal display elements and a liquid crystal driving circuit, a boosting circuit is provided to a pixel portion. The boosting circuit, after writing a video signal in a pixel electrode and one electrode of a boosting capacitance, brings the pixel electrode into a floating state. Then, by applying the video signal to another electrode of the boosting capacitance, a voltage of the pixel electrode is boosted or dropped. | 04-30-2009 |
20090195492 | Liquid crystal display device - A liquid crystal display device used in miniaturized portable equipment which adopts dot inversion in performing a display and adopts frame inversion in driving the liquid crystal display device thus acquiring favorable display quality with low power consumption is provided. In a liquid crystal display device which includes a liquid crystal display element and a liquid crystal driver circuit, pixel portions are arranged on both left and right sides with a video signal line sandwiched therebetween. Pixel portions which are connected to an odd-numbered scanning line are formed on a left side of the video signal line and pixel portions which are connected to an even-numbered scanning line are formed on a right side of the video signal line thus performing a display by dot inversion. When the pixels are arranged on a right side of the video signal line, a distribution circuit may be configured to supply video signals outputted from a left-side terminal out of two neighboring terminals of the driver circuit also to the video signal lines which are connected to the right-side terminal. | 08-06-2009 |
20090219241 | Liquid crystal display device - A liquid crystal display device has a liquid crystal display panel which includes: a first substrate; a second substrate; a liquid crystal composition which is sandwiched between the first substrate and the second substrate; a pixel region which is formed of a plurality of pixels arranged in a matrix array on the first substrate, each pixel including a pixel electrode, a counter electrode which faces the pixel electrode in an opposed manner, and a switching element which is electrically connected with the pixel electrode; and a driver circuit which is mounted on the first substrate along a first side of the pixel region. In such a liquid crystal display device, the driver circuit is configured to rewrite a video signal in each pixel of the pixel region for every 1 frame period via the switching element, the driver circuit includes a first AC driving mode in which polarity of a video signal to be rewritten in a frame period succeeding to the 1 frame period is inverted, and a second AC driving mode in which the polarity of the video signal to be rewritten in the succeeding frame period is equal to polarity of the video signal in the 1 frame period, and a reference voltage of the video signal is corrected so as to decrease brightness of the pixel in the second AC driving mode. | 09-03-2009 |
20090231257 | LIQUID CRYSTAL DISPLAY DEVICE - Provided is a drive circuit low in power consumption and high in display quality for a liquid crystal display device that is used in a small-sized portable device. The liquid crystal display device includes liquid crystal display elements and a liquid crystal driving circuit. The liquid crystal driving circuit is mounted to one of the four sides of a liquid crystal display panel, and is capable of outputting two-system counter electrode voltages. A variable resistor circuit having a resistance value which is variably adjusted by a register is used to correct and output a gray scale voltage according to a position of a relevant scanning signal line. Equalization is also performed by short-circuiting two counter electrode signal lines. | 09-17-2009 |
20090251387 | Display device - Let a drive circuit chip shrink in outer shape size to thereby enable miniaturization of a display device as a whole. | 10-08-2009 |