摘要:
A liquid crystal display device (100A) according to the present invention includes a plurality of pixels (10) which are arranged in columns and rows to form a matrix pattern. Each of the plurality of pixels (10) includes first and second subpixels (10a, 10b), which are arranged in a column direction, one of which is a bright subpixel that exhibits a higher luminance than the other at least at a particular grayscale, and the other of which is a dark subpixel. The plurality of pixels define a plurality of color display pixels, each of which includes an even number of pixels including first, second, third and fourth pixels (Y, R, G, B) that are arranged in a row direction. In an arbitrary row of pixels, a row of subpixels including the bright subpixels includes the respective bright subpixels of all of the first, second, third and fourth pixels.
摘要:
An active matrix type liquid crystal display device may include a black signal insertion device to apply a voltage corresponding to a black display as a voltage for data signal lines only during a black signal insertion period that is a part of one frame period, a black insertion ratio change device to change the insertion period, and an unchanged-storage-capacitor-phase-keeping device to control the insertion period after the change. The control makes a time difference the same, before and after the change, between (i) a timing, among timings at which signal voltages of the first or second storage capacitor line rise, at which a storage capacitor voltage rises that is both prior to a start timing of the insertion period and a closest timing to the start timing of the insertion period, and (ii) the start timing of the insertion period.
摘要:
A liquid crystal display device includes a plurality of pixels each including a first subpixel and a second subpixel having liquid crystal layers to which mutually different voltages are applicable, and two switching elements that are provided for the first and second subpixels, respectively. The device further includes a plurality of storage capacitor trunks electrically connected to respective storage capacitor counter electrodes of either the first subpixels or the second subpixels of the pixels through storage capacitor lines.
摘要:
In at least one embodiment a ripple, generated in an electric potential of data signal lines even in long-term reversal driving, is reduced and display quality is improved. In at least one example embodiment, the liquid crystal display apparatus of the present invention includes scanning signal lines and data signal lines, in which one scanning pulse is outputted to select one scanning signal line, each of the data signal lines receives data signals whose polarities are reversed per one vertical scanning period while in one horizontal scanning period, one of two data signal lines receives a data signal having a polarity and the other of the two data signal lines receives another data signal having another polarity, the two data signal lines being arranged adjacent to each other, scanning pulses are successively outputted in sets of two, and at a timing in which two scanning pulses fall, two scanning pulses rise.
摘要:
Each pixel includes first and second subpixels and two switching elements provided for those subpixels. Each subpixel includes a liquid crystal capacitor and a storage capacitor. The storage capacitor counter electrodes of the first and second subpixels are electrically independent. A storage capacitor counter voltage applied to each storage capacitor counter electrode by way of its associated storage capacitor line has a first period (A) with a first waveform during one vertical scanning period. The first waveform oscillates between multiple voltage levels in a first cycle time (PA) that is an integral number of times (and at least four times) as long as one horizontal scanning period (H). Each of the voltage levels has a flat portion with a duration TP. While the two switching elements are ON, a display signal voltage is applied to the respective subpixel electrodes and respective storage capacitor electrodes of the first and second subpixels. After the two switching elements have been turned OFF, voltages at the storage capacitor counter electrodes of the first and second subpixels change. And if an interval between a point in time when the two switching elements in ON state have just been turned OFF and a point in time when the storage capacitor counter voltage changes for the first time is βH, TP/4≦β
摘要:
A display device includes first and second display pixels connected to a first source line, third and fourth display pixels connected to the second source line. The device further includes a receiver receiving display voltage for each display pixel, a calculator calculating first difference voltage between the display voltages of the first and second display pixels, and calculating a second difference voltage between the display voltages of the third and fourth display pixels. A parasitic capacitance is generated between the first display pixel and each source line and between the third display pixel and each source line. The display device further includes a generator correcting the first display voltage based on the first and second difference voltages and generating first write voltage for the first display pixel, and correcting the third display voltage based on the second difference voltage and generating third write voltage for the third display pixel.
摘要:
In one embodiment of the present invention, a liquid crystal display device according to the present invention includes a plurality of pixels, each including first and second subpixels. When a predetermined grayscale tone is displayed continuously through four or more consecutive even number of vertical scanning periods, the first and second subpixels have different luminances in at least two of the even number of vertical scanning periods, first polarity periods that are included in the vertical scanning periods and that maintain a first polarity are as long as second polarity periods that are also included in the vertical scanning periods and that maintain a second polarity for each of the first and second subpixels, and in each of the first and second polarity periods, the difference between the average of effective voltages applied to the liquid crystal layer of the first subpixel and that of effective voltages applied to the liquid crystal layer of the second subpixel is substantially equal to zero.
摘要:
Provided are a display device which may be capable of eliminating display irregularities due to the difference in the charging rate between lines, while preventing increase in heat generation and power consumption by the device, and a circuit and method for driving the same. In a liquid crystal display device employing both a 2-line dot-inversion drive method and a charge-sharing method, a charge-sharing period (TB) within a horizontal scanning period (2H period) in which the polarity of each data signal is the same as that in one horizontal scanning period previous thereto, is set to be longer than a charge-sharing period (TA) within a horizontal scanning period (1H period) in which the polarity of each data signal is different from that in one horizontal scanning period previous thereto. Thus, a charge period within the 2H period can be shorter than that within the 1H period.
摘要:
The vertical scan period of the input video signal is divided into at least two sub-frames. In each of the sub-frames, a display signal voltage is written into each pixel. Two vertical scan periods in which the input video signals are continuous contain a sequence of two continuous sub-frames where a display signal voltage is written with the same polarity and a sub-frame where the polarity of the display signal voltage is inversed. The auxiliary capacity opposing voltage includes, in each of the sub-frames, a first waveform vibrating with a first cycle of the horizontal scan period multiplied by an integer not smaller than 2 and a second waveform in which an effective value of the auxiliary capacity opposing voltage is set to a predetermined constant value for each vertical scan period of a predetermined number of continuous input video signals.
摘要:
The present invention relates to display devices. The present invention aims to provide a display device capable of eliminating display irregularities due to the difference in the charging rate between lines, while preventing increase in heat generation and power consumption by the device, and also to provide a circuit and method for driving the same. In a liquid crystal display device employing both a 2-line dot-inversion drive method and a charge-sharing method, a second charge-sharing period (TB), which is a charge-sharing period within a horizontal scanning period (2H period) in which the polarity of each data signal is the same as that in one horizontal scanning period previous thereto, is set to be longer than a first charge-sharing period (TA), which is a charge-sharing period within a horizontal scanning period (1H period) in which the polarity of each data signal is different from that in one horizontal scanning period previous thereto. Thus, a charge period within the 2H period can be shorter than that within the 1H period.