Vertically-aligned liquid crystal display panel having no light leakage in the black state

• Main Authors: HAO-TING TIEN, CHEN-LUN CHIU
• Format: Patent
• Language: English
• Published: 10.01.2007
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A liquid crystal display panel including a first substrate (100), a second substrate (105) and a liquid crystal layer (108) is provided. The first substrate (100) has active devices (102) and pixel electrodes (104) thereon, wherein each pixel electrode (104) includes first strips (308). The second substrate (105) has a common electrode (107) thereon, wherein the common electrode (107) includes second strips (408), and the second strips (408) are aligned to the first strips (308). The liquid crystal layer (108) is disposed between the first substrate (100) and the second substrate (105), wherein the liquid crystal layer (108) includes a plurality of vertically aligned liquid crystal molecules (108a). The vertically aligned liquid crystal molecules (108a) are perpendicular to the two substrates (100, 105) when no electric filed is formed between the pixel electrodes (104) and the common electrode (107). The vertically aligned liquid crystal molecules (108a) arrange in accordance with the distribution of an electric field when a driving voltage is applied between the pixel electrodes (104) and the common electrode (107). Such that the device is like an optically compensated bend (OCB) mode LCD, and has no light leakage in the black state.