Sharp Kabushiki Kaisha Corporation

Masae Kawabata

Fumikazu Shimoshikiryoh

Kentaroh Irie

Toshikazu Tsuchiya

Yuki Yamashita

Hiroto Suzuki

Makoto Shiomi

Kentaro Irie

Akihiro Shohraku

Toshihide Tsubata

Yoshihiro Izumi

Fumikazu Shimoshikiryo

Akihiro Shoraku

Ikumi Itsumi

Hiroaki Nakasu

Kentarou Irie

A liquid crystal panel () includes a plurality of pixels arranged in a matrix pattern having rows and columns. A plurality of Cs bus lines () as storage capacitor lines are routed in the row direction of the liquid crystal panel (). A plurality of branch lines () are routed in the column direction across a pixel region (). The branch lines () are connected to the Cs bus lines () so that control signals are sent to storage capacitors from the branch lines () through the Cs bus lines ().

Liquid crystal panel

A liquid crystal display device includes a liquid crystal panel having a plurality of pixels grouped into four types of type, type, type, and type; a panel driver circuit connected to the liquid crystal panel to drive the liquid crystal panel; and a display control circuit connected to the panel driver circuit, wherein said display control circuit divides each refresh cycle of the image signal into consecutive first to fourth terms and causes the panel driver circuit to drive the liquid crystal panel to perform a halftone display by changing pixel luminance during each refresh cycle composed of the first to fourth terms, and wherein said display control circuit provides timing signals and gradation data to the panel driver circuit so that, for a given halftone to be displayed in a refresh cycle, pixels belonging to respective types in the liquid crystal panel are driven such that the halftone is generated as averaged over the first to fourth terms.

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

In a liquid crystal display device adopting a time-division scheme to improve viewing angle characteristics, the occurrence of horizontal lines on a screen is suppressed. When first output gray scales are obtained for one-line data, the sum total of differences between 'source voltages for a horizontal scanning period immediately before a horizontal scanning period during which a processing target line is placed in a selected state' and 'source voltages determined based on the first output gray scales obtained by a gray scale value obtaining unit' for all source bus lines is determined (step S). Then, based on the amount of CS ripple corresponding to the sum total determined at step S, correction addition/subtraction values are obtained from a polarity-by-polarity background look-up table, for the respective picture elements included in the processing target line (step S). Then, second output gray scales are determined in an addition/subtraction process of the first output gray scales and the correction addition/subtraction values (step S).

Liquid crystal display device

The present invention provides a liquid crystal display device that appropriately compensates for a feed-through voltage. The liquid crystal display device is arranged such that when data of a certain gray level is to be displayed, the effective value of a pixel voltage changes in an N-frame cycle, a first pixel and a second pixel are provided that are different in the effective value during an i-th frame (1&#x2266;i&#x2266;N), the first pixel has a positive polarity during the i-th frame, whereas the second pixel has a negative polarity during an i{N/2 after}th frame, the first pixel has a polarity during a j-th frame (where 1&#x2266;j&#x2266;N and i&#x2260;j), the polarity being different from the polarity of the second pixel during a j{N/2 after}th frame, and when data of a first gray level is to be displayed, VB and VC are different from each other, where VA is a source voltage (VD) of the first pixel during the i-th frame, VB is a source voltage (VD) of the second pixel during the i{N/2 after}th frame, and VC is, in a case where data of a second gray level is to be displayed when the first pixel has a positive polarity during the j-th frame, a source voltage (VD) of the second pixel during the j{N/2 after}th frame for the case in which the source voltage (VD) of the first pixel during the first pixel is VA.

Liquid crystal display device and method for driving a liquid crystal display device

A liquid crystal display device which carries out a single tone display with a change in pixel luminance during a single cycle composed of first to mth frame periods (m is an integer of 4 or more), includes: pixels of a first type in which when a halftone is displayed, supply of two or more kinds of data voltage during at least either the first to nth frame periods (n is an integer of 2 or more to m or less) or the (n+1)th to mth frame periods causes liquid crystal layers to produce rise responses during the first to nth frame periods and produce decay responses during the (n+1)th to mth frame periods; and pixels of a second type in which when a halftone is displayed, supply of two or more kinds of data voltage during at least either the first to nth frame periods or the (n+1)th to mth frame periods causes liquid crystal layers to produce decay responses during the first to nth frame periods and produce rise responses during the (n+1)th to mth frame periods. This makes it possible to achieve both an improvement in viewing angle characteristic and a reduction in flickers.

LCD device and television receiver

The present invention has as an object to reduce display unevenness that occurs under the influence of a coupling between a first pixel in which a green component is displayed and a data signal line by which second pixel is driven. The present invention includes a correction process section () for obtaining pixel data on a second pixel in which a blue component or a red component is displayed, the second pixel being driven by a data signal line adjacent to a first pixel in which a green component is displayed, and for, if the pixel data on the second pixel represents a tone value falling within a range of 0 to a predetermined first value, correcting the tone value to be the first value.

Data processing device, liquid crystal display device, television receiver, and data processing method

Provided is a data processing apparatus including a correction circuit. In at least one embodiment, the data correction circuit acquires pixel data of a first pixel for display of a first color component and pixel data of a second pixel for display of a second color component, the second pixel being driven by a scanning signal line which drives the first pixel and being driven by a data signal line which is adjacent to the first pixel, and corrects the pixel data of the second pixel in accordance with a relationship between a value of the pixel data of the first pixel and a value of the pixel data of the second pixel. Thus, it is possible to cause a liquid crystal driving panel to perform uniform display without causing display unevenness even in a case where a halftone of a specific color component is uniformly displayed.

Data processing apparatus, liquid crystal display device, television receiver, and data processing method

Provided is a liquid crystal display device which displays each halftone by changing the luminance of pixels during a cycle (F-F) composed of a first term (F-F), a second term (F-F), a third term (F-F), and a fourth term (F-F). The liquid crystal display device includes: a type 1 pixel, which luminance level rises during the first term, rises or stays on hold during the second term, decays during the third term, and decays or stays on hold during the fourth term; a type 2 pixel, which luminance level decays during the first term, decays or stays on hold during the second term, rises during the third term, and rises or stays on hold during the fourth term; a type 3 pixel, which luminance level rises or stays on hold during the first term, decays during the second term, decays or stays on hold during the third term, and rises during the fourth term; a type 4 pixel, which luminance level decays or stays on hold during the first term, rises during the second term, rises or stays on hold during the third term, and decays during the fourth term to continuously display the same halftone.

At least one embodiment of a liquid crystal display device including: scanning signal lines provided in a display area; and a dummy scanning signal line provided in a non-display area, the scanning signal lines being divided into groups each of which includes a plurality of scanning signal lines, the groups being sequentially selected, signal electric potentials of an identical polarity being sequentially supplied to a data signal line while scanning signal lines belonging to a selected group are sequentially scanned horizontally, the polarity of the signal electric potentials being inverted when the selected group is changed from a preceding group to a succeeding group which is selected immediately after the preceding group, a dummy scanning period being inserted between a horizontal scanning period corresponding to last horizontal scanning in the preceding group and a horizontal scanning period corresponding to first horizontal scanning in the succeeding group, and the dummy scanning signal line being subjected to dummy scanning during the dummy scanning period. With the arrangement, it is possible to suppress horizontal-shaped unevenness that occurs in a case where block inversion driving is carried out.

Liquid crystal display device, method for driving liquid crystal display device, and television receiver

The present invention provides a display device which is arranged so that when an image is scrolled, a noise pattern does not easily overlap the image. The display device includes a display region that includes a region in which an arrangement pattern (U) including X i-th pixels arranged next to one another in the row direction for each data color, the arrangement pattern being repeated in the row direction, the X being represented by/2+

Display device and method for driving display device

At least one embodiment of a liquid crystal display device including: pixels each of which includes a plurality of sub-pixels; and scanning signal lines provided in a display area, the scanning signal lines being divided into groups each of which includes a plurality of scanning signal lines, the groups being sequentially selected, the polarity POL of signal electric potentials being inverted when the selected group is changed from a preceding group to a succeeding group which is selected immediately after the preceding group, a plurality of (for example, two) dummy scanning periods being inserted between a horizontal scanning period corresponding to last horizontal scanning (scanning of G) in the preceding group and a horizontal scanning period corresponding to first horizontal scanning (scanning of G) in the succeeding group, and a scanning signal line (for example, G) which belongs to a group selected after the preceding group being subjected to dummy scanning during each dummy scanning period so as to be made active for a predetermined period of time, and then deactivated. With the arrangement, it is possible to suppress horizontal-shaped unevenness that occurs in a case where block inversion driving is carried out in a multi-pixel mode liquid crystal display device.

At least one embodiment of a liquid crystal display device including a display unit having scan signal lines divided into a plurality of groups which are successively selected. While the scan signal lines belonging to the selected group are successively scanned horizontally, signal potentials of the same polarity are successively supplied to a data signal line. The polarity of the signal potential is reversed between a preceding group and a subsequent group which are selected continuously. A plurality of dummy scan periods are inserted between the horizontal scan period corresponding to the last horizontal scan in the preceding group and the horizontal scan period corresponding to the first horizontal scan in the subsequent group. In each of the dummy scan periods, one of the scan signal lines which belong to the group selected after the preceding group is subjected to a dummy scan so that the scan signal line is maintained in an active state for a predetermined period and then deactivated so as to align the load state of a scan signal line drive circuit. This can reduce irregularities of the horizontal stripes when the data signal line is subjected to the block reverse drive.

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

When each of R, G, and B pixels continuously display identical gray scales (1023 gray scale) in a liquid crystal display device in which the thicknesses of the liquid crystal layers are of R pixel&#x3e;G pixel&#x3e;B pixel, the R pixel is alternately supplied with a positive signal potential (SHR) and a negative signal potential (SLR), the G pixel is alternately supplied with a positive signal potential (SHG) and a negative signal potential (SLG), and the B pixel is alternately supplied with a positive signal potential (SHB) and a negative signal potential (SLB). A first middle value (SMR) that between SHRand SLRis set higher than a second middle value (SMG) that is between SHGand SLG, and second middle value (SMG) is set higher than a third middle value (SMB) that is between SHBand SLB

Growing community of inventors

Osaka, Japan

Masae Kawabata