Sharp Kabushiki Kaisha Corporation

Naoshi Yamada

Toshihide Tsubata

Fumikazu Shimoshikiryoh

Masae Kitayama

Kentaro Irie

Masumi Kubo

Takashi Ochi

Akihiro Yamamoto

Kiyoshi Ogishima

Katsuhiko Morishita

Kazuhiro Maekawa

Hidehiko Yamaguchi

Tetsuhiro Yamaguchi

Masayuki Tsuji

Hidetoshi Nakagawa

Yukio Kurozumi

Mitsuaki Hirata

Kentaroh Irie

Makoto Shiomi

Yoshiki Takata

Shigeaki Mizushima

Yoshinori Shimada

Takaharu Yamada

Mitsuhiro Shigeta

Shinichi Hirato

Okifumi Nakagawa

Akihiro Shoraku

Chikanori Tsukamura

Nobuhiro Waka

Junichi Sawahata

Toshihisa Uchida

Eiichiro Nishimura

Nobuhiko Nakai

Ichiro Nakamura

Hidetomo Miyake

Hiroyuki Araki

Kohichi Toriumi

Kazushi Tsuji

Yuhichi Inoue

In one embodiment of the present invention, each pixel includes first and second subpixels. CS bus lines connected to the respective storage capacitors of the first and second subpixels are electrically independent of each other. A CS voltage has a waveform that inverts its polarity at least once a frame, which includes a first subframe for sequentially scanning a series of odd rows and a second SF for sequentially scanning even rows that have been skipped during the first SF. A source signal voltage varies so as to have two frames or subframes with mutually opposite polarities. A CS voltage has a waveform that has quite opposite consequences on the effective voltage of a subpixel of a pixel connected to the jscan line to be selected during the first subframe and on that of another subpixel of a pixel connected to the (j+1)scan line to be selected during the second subframe. In this manner, the deterioration in display quality, which would be caused if either a source line inversion drive or a block inversion drive is applied to a multi-pixel technology, can be minimized.

Liquid crystal display

In one embodiment of the present invention, a driving method of a liquid crystal display device is disclosed. According to one embodiment of the present invention a driving method of an active matrix display device is disclosed including: a plurality of source lines; a plurality of gate lines that intersect the source lines; and a plurality of pixel formation sections being disposed in a matrix manner at the respective intersections of the source lines and the gate lines, each of the pixel formation sections receiving as a pixel value a voltage applied to the source line that passes through the corresponding intersection when the gate line that passes through the corresponding intersection is selected, wherein non-image signals are applied to the source lines in each horizontal scanning period, and the gate lines are selected in an effective scanning period, and thereafter the gate lines are selected, in sync with a timing of application of the non-image signals to the source lines, before the subsequent effective scanning period comes after a point in time when the gate lines have been brought into non-selected state.

Liquid Crystal display device and driving method thereof, television receiver, liquid crystal display program computer-readable storage medium storing the liquid crystal display program, and drive circuit

In one embodiment, a liquid crystal display device is disclosed in which a gate driver applies a gate-on pulse so that a second period is longer than a first period. Among gate-on pulses applied before the moment of polarity inversion of a data signal, the last end of the gate-on pulse nearest to the moment of the polarity inversion is earlier than the end time of the horizontal period during which the gate-on pulse is applied. The first period starts at the last end of the gate-on pulse and ends at the end time of the horizontal period during which the gate-on pulse is applied. The second period starts at the moment of the polarity inversion and ends at the moment of the application start of the gate-on pulse nearest to the moment of the polarity inversion among the gate-on pulses applied after the polarity inversion.

Liquid crystal display device, scan signal drive device, liquid crystal display device drive method, scan signal drive method, and television receiver

A gate driver creates a dummy insertion period in which the driver does not apply a gate on pulse to a scanning signal line immediately after the time of the inversion of a data signal. When a period from the time of the application of the gate on pulse to an odd numbered or even numbered scanning signal line to which the gate on pulse is applied previously to the time of the application of the gate on pulse to an even numbered or odd numbered scanning signal line to which the gate on pulse is applied later is set as an adjacent line writing time lag period for two scanning signal lines adjacent to each other, a CS control circuit allows the polarity of every CS signal to be reversed on the same cycle at least in the adjacent line writing time lag period.

Liquid crystal display device, liquid crystal display device drive method, and television receiver

The liquid crystal display device of this invention includes picture element regions each defined by a first electrode provided on a first substrate and a second electrode provided on a second substrate so as to oppose the first electrode via a liquid crystal layer sandwiched therebetween. In each of the picture element regions, the first electrode includes a solid portion and a nonsolid portion. The liquid crystal display device further includes a pair of polarizing plates disposed with polarization axes thereof crossing each other substantially perpendicularly. The polarization axis of one of the pair of polarizing plates is substantially parallel to a direction in which the solid portion extends. When a voltage is applied between the first electrode and the second electrode, in each of the picture element regions, liquid crystal molecules of the liquid crystal layer are in a radially-inclined orientation state.

Liquid crystal display device

In a liquid crystal display device according to one embodiment of the present invention, when the polarities of the source signal voltages do not change over a plurality of horizontal scanning periods, the image write pulse of the gate signal supplied to a gate bus line that corresponds to pixels along the jrow rises before the source signal voltages change to values that correspond to pixels along the jrow. Next, the image write pulse of the gate signal supplied to a gate bus line that corresponds to pixels along the jrow falls, and then the image write pulse of the gate signal supplied to a gate bus line that corresponds to pixels along the krow (j&#x2260;k) rises. The polarities of the storage capacitor signal voltages applied to storage capacitor bus lines that correspond to sub-pixels of pixels along the jrow are inverted after the image write pulse of the gate signal supplied to a gate bus line that corresponds to pixels along the krow rises.

In one embodiment of the present invention, a gate driver creates a dummy insertion period in which the driver does not apply a gate on pulse to a scanning signal line immediately after the time of the inversion of a data signal. When a period from the time of the application of the gate on pulse to an odd numbered or even numbered scanning signal line to which the gate on pulse is applied previously to the time of the application of the gate on pulse to an even numbered or odd numbered scanning signal line to which the gate on pulse is applied later is set as an adjacent line writing time lag period for two scanning signal lines adjacent to each other, a CS control circuit allows the polarity of every CS signal to be reversed on the same cycle at least in the adjacent line writing time lag period. This makes it possible to provide a liquid crystal display device capable of offering high quality display in which unevenness in the display is suppressed without being affected by the blunt waveform of the data signal and the blunt waveform of a retention volume signal at the time of the inversion.

Provided is an active matrix substrate configured such that: a retention capacitor line () is provided so as to correspond to a space between adjacent pixel regions (&#x3b2;); capacitor electrodes () are provided so as to overlap the retention capacitor line (); a retention capacitor line () is provided so as to correspond to a space between adjacent pixel region (&#x3b3;); capacitor electrodes () are provided so as to overlap the retention capacitor line (); a first pixel electrode () provided in the pixel region (&#x3b1;) is electrically connected to the capacitor electrode () overlapping one () of adjacent retention capacitor lines () and a second pixel electrode () provided in the pixel region (&#x3b1;) is electrically connected to the capacitor electrode () overlapping the other one () of the two adjacent retention capacitor lines (); and an interconnection line () for electrically connecting the first pixel electrode () is provided. The arrangement allows an active matrix substrate employing a pixel dividing method in which a plurality of pixel electrodes are provided in a single pixel, to restrain the number of retention capacitor lines and to improve flexibility in shapes of individual pixel electrodes.

Active matrix substrate, liquid crystal panel, liquid crystal display unit, liquid crystal display device, and television receiver

In one embodiment of the present invention, a liquid crystal display device is disclosed in which a gate driver applies a gate-on pulse so that a second period is longer than a first period. The first period and the second period are defined as follows. Among gate-on pulses applied before the moment of polarity inversion of a data signal, the last end of the gate-on pulse nearest to the moment of the polarity inversion is earlier than the end time of the horizontal period during which the gate-on pulse is applied. The first period starts at the last end of the gate-on pulse and ends at the end time of the horizontal period during which the gate-on pulse is applied. The second period starts at the moment of the polarity inversion and ends at the moment of the application start of the gate-on pulse nearest to the moment of the polarity inversion among the gate-on pulses applied after the polarity inversion. Thus, even when a data signal waveform is not sharp upon polarity inversion, it is possible to suppress display unevenness and perform a high-quality display.

Projecting sections controlling alignment directions of liquid crystal molecules are provided on at least one of an active matrix substrate and a counter substrate. When viewed from a direction perpendicular to a surface of the active matrix substrate or of the counter substrate, an outline shape of the projecting sections is constituted by continuously arranging a plurality of unit patterns each having a side in parallel with the polarization axis of the first polarizing plate and a side in parallel with the polarization axis of the second polarizing plate. This makes it possible to provide a liquid crystal panel that performs better display with high contrast by reducing a light leakage during a black display period and by ensuring a light transmittance during a gray level display period and a white display period.

Liquid crystal panel, liquid crystal display unit, and television receiver equipped with the same

The present invention provides a liquid crystal display panel, a liquid crystal display device, and a television receiver, each of which permits shortening of production time, simplification of inventory management of the CF substrate, and reduction in production costs. The present invention is a liquid crystal display panel including:

Liquid crystal display panel, liquid crystal display device, and television receiver

A first sub-pixel area and a second sub-pixel area that are provided in each of pixel areas so as to sandwich a scanning signal line. A first sub-pixel is arranged to include the first sub-pixel area and a section of the counter substrate which section corresponds to the first sub-pixel, area and the second sub-pixel is arranged to include the second sub-pixel area and a section of the counter substrate which section corresponds to the second sub-pixel area. A first alignment control structure is provided in the first sub-pixel and a second alignment control structure is provided in the second sub-pixel. The first alignment control structure (Land Sto S) provided in one pixel () of two adjacent pixels has a shape obtained by rotating by 180&#xb0; the first alignment control structure (L, Sto S) provided in the other one pixel () of the two adjacent pixels. This makes it possible to suppress deterioration in viewing angle characteristics caused by disordered alignment along the scanning signal line () in a liquid crystal panel in which a plurality of alignment domains can be formed.

Liquid crystal panel, liquid crystal display device, and television device

In one embodiment of the present invention, a liquid crystal panel driving apparatus is disclosed which sequentially receives pieces of video data for one data signal line, (i) prepares a data string by sorting, in order of outputting, a plurality of pieces of video data inputted in a predetermined period while adding a piece of dummy data to a predetermined position, (ii) assigns one horizontal scanning period to an output of a piece of video data while assigning a dummy scanning period to an output of a piece of dummy data, and (iii) sets one horizontal scanning period shorter than an interval of inputting of pieces of video data. This makes it possible to suppress an increase in vertical display period even though a piece of dummy data is added to inputted video data while a dummy scanning period is assigned thereto.

Liquid crystal panel driving apparatus, liquid crystal display apparatus, method for driving liquid crystal display apparatus, drive condition setting program, and television receiver

The present invention provides a liquid crystal display panel which can reduce the transmittance and further improve the response speed. The liquid crystal display panel of the present invention is a liquid crystal display panel including the first substrate, a liquid crystal layer, and the second substrate in this order, wherein at least one of the first and second substrates has a linear alignment control structure for dividing a pixel into a plurality of regions, and the linear alignment control structure has a comb-tooth structure extending toward one side, and preferably wherein the liquid crystal display panel has three or more alignment control structures for dividing a pixel into a plurality of regions, the three of more alignment control structures including the linear alignment control structure, the liquid crystal display panel has a region where the linear alignment control structure, a linear alignment control first structure of the three or more alignment control structures, a linear alignment control second structure of the three or more alignment control structures extend in parallel with one another and an interval between the linear alignment control structure and the linear alignment control first structure is larger than an interval between the linear alignment control structure and the linear alignment control second structure, and the comb-tooth structure of the linear alignment control structure extends toward the linear alignment control first structure.

Liquid crystal display panel, liquid crystal display element, and liquid crystal display device

A liquid crystal display panel () includes an active matrix substrate (), a liquid crystal material (), and a color filter substrate (), wherein a spacer () is provided between the active matrix substrate () and the color filter substrate (), and the color filter substrate () includes a step section () for restricting a movement of a spacer, the step section being provided so as to surround the spacer (). This makes it possible to restrict the movement of the spacer in the liquid crystal display panel, thereby improving evenness of a cell gap.

Liquid crystal display panel, liquid crystal display unit, liquid crystal display device, television receiver, and method for manufacturing color filter substrate

Growing community of inventors

Osaka, Japan

Naoshi Yamada