Au Optronics Corporation

Chen-Kuo Yang

Hsueh-Ying Huang

Chien-Hua Chen

Chih-Yuan Chien

Ming-Sheng Lai

Chih-Wei Wang

Min-Feng Chiang

Hsuen-Ying Huang

A pixel circuit includes a first sub-pixel and a second sub-pixel. The first sub-pixel is coupled to a scan line and a data line, so as to determine whether to be enabled according to a first scan signal transmitted on the scan line, and whether to be driven according to a data signal transmitted on the data line. The second sub-pixel is coupled to the scan line, so as to determine whether to be enabled according to the first scan signal. The data signal is in a first state when the first scan signal is in a pre-charged period. The data signal is in a second state during a time interval after the pre-charged period is over and before the first scan signal enters a turn-on period. Voltage polarities of the first state and the second state are opposite. The pixel design can improve color shift and frame flicker.

Pixel circuit

A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes a plurality of pixels, a plurality of scan lines, and a plurality of data lines. Each pixel includes a plurality of sub-pixels. Each sub-pixel is coupled to the data line, and includes a switch, a storage capacitor, and a sub-pixel electrode. The switch is coupled to a scan line to receive a scan signal. The switch is turned on by the scan signal to receive a data signal transmitted from the data line. The storage capacitors of the sub-pixels of each pixel are coupled to the scan lines, or the storage capacitor of one of the sub-pixels of each pixel is coupled to a common electrode and the storage capacitors of the other sub-pixels are coupled to the scan lines. The switch and the storage capacitor of each sub-pixel are coupled to different scan lines. The method includes transmitting the scan signal having a plurality of voltage levels to modulate the voltage levels of one or more sub-pixel electrodes of the sub-pixels of the same pixel, thereby enabling the sub-pixels of the same pixel to have different voltage levels.

Liquid crystal display and driving method thereof

Pixel circuit, display panel, and driving method thereof

In a multi-domain vertical alignment liquid crystal display wherein a pixel that has two sub-pixels, an additional switching element is used to achieve a voltage differential between the electrode voltage potential in one sub-pixel and the other during and after the charge-sharing period. The electrodes in the sub-pixels are connected to each other through a charge-sharing capacitor and a controlling switching element, such as another transistor. Before the charge-sharing period, the controlling switching element is operated in a non-conducting state and the voltage potentials of the sub-pixel electrodes are substantially equal. During the charge-sharing period, the controlling switching element is operated in a conducting state to facilitate charge-sharing. The additional switching element is used to achieve the voltage differential more effectively and without additional capacitors.

Multi-domain vertical alignment liquid crystal display with charge sharing

A liquid crystal display (LCD) panel with color washout improvement. In one embodiment, the LCD panel a plurality of pixels, {P}, spatially arranged in the form of a matrix, n=1, 2, . . . , N, and m=1, 2, . . . , M, and N, M being an integer greater than zero, each pixel Pcomprising at least a first sub-pixel, P(), having a sub-pixel electrode and a second sub-pixel, P(), having a sub-pixel electrode. The plurality of pixels, {P}, is configured such that when a gray level voltage associated with a gray level, g, of an image to be displayed on a pixel is applied to the pixel P, a potential difference, &#x394;V(g), is generated in the sub-pixel electrodes of the first and second sub-pixels of the pixel P. The potential difference, &#x394;V(g) varies with the gray level g of the image to be displayed on the pixel, where g=0, 1, 2, . . . , R corresponding to one of the shades of grey of the image expressed in h bits, h being an integer greater than zero and R=(2&#x2212;1).

Liquid crystal display panel with color washout improvement and applications of same

A liquid crystal display (LCD) panel with color washout improvement. In one embodiment, the LCD panel includes a common electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixels formed by the plurality of data lines crossing the plurality of scanning lines, each pixel comprising two or more sub-pixels, each sub-pixel comprising a sub-pixel electrode, a transistor electrically coupled to a corresponding scanning line, a corresponding data line and the sub-pixel electrode, a liquid crystal capacitor electrically coupled between the sub-pixel electrode and the common electrode, and a storage capacitor, wherein at least one of the storage capacitors of the two or more sub-pixels is electrically coupled between its corresponding sub-pixel electrode and a scanning line immediately prior or next to the corresponding scanning line, and the rest of the storage capacitors of the two or more sub-pixels each is coupled between its corresponding sub-pixel electrode and the common electrode.

Liquid crystal display panel with color washout improvement by scanning line coupling and applications of same

A liquid crystal display with uniform feed-through voltage includes a plurality of data lines for receiving a plurality of data signals respectively, a plurality of gate lines for receiving a plurality of gate signals respectively, a plurality of common lines for receiving a common voltage, a plurality of storage units, a plurality of first switches, and a plurality of second switches. Each storage unit includes a first liquid crystal capacitor and a second liquid crystal capacitor coupled to a corresponding common line. Each first switch is coupled to a corresponding data line, a corresponding gate line, and a corresponding first liquid crystal capacitor. Each second switch is coupled to a corresponding gate line, a corresponding first switch, and a corresponding second liquid crystal capacitor. The capacitance of the gate-source capacitor of each first switch is greater than the capacitance of the gate-source capacitor of each second switch.

Growing community of inventors

Hsinchu, Taiwan

Chen-Kuo Yang