Patent number 8542338 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The present invention relates to a liquid crystal display (LCD) device, and more particularly, to an in-plane switching (IPS) mode LCD device and a fabrication method thereof that prevent a blot phenomenon, such as a chuck blot, causing an external light to be reflected.
"In light of the recent developments in various portable information display electronic devices, research is actively ongoing focusing on several types of flat panel display devices including liquid crystal display (LCD) devices, plasma display panel (PDP) devices, field emission display (FED) devices, and vacuum fluorescent display (VFD) devices. In particular, LCD devices have received much attention because they are light and thin, are simple to mass produce, produce high quality images, and have a low power consumption.
"An LCD device displays images by controlling a light transmittance of a liquid crystal layer with pixels arranged in a matrix form and applying a data signal according to picture information to each pixel. The LCD device is commonly driven using an active matrix (AM) method in which a switching device, such as a thin film transistor (TFT), is provided in each pixel to apply a voltage to each pixel to change the light transmittance therethrough.
"There are various display modes of the LCD devices based on how liquid crystal molecules are driven. For example, a twisted nematic (TN) mode is commonly employed in LCD devices due to advantages, such as easy black and white display function, rapid response time and low driving voltage. The TN mode LCD device drives liquid crystal molecules using an electric field perpendicular to a substrate, such that a director of liquid crystal can have an angle between 0.degree. and 90.degree. with respect to the substrate. However, the TN mode LCD device is disadvantageous in that a viewing angle for an observer is undesirably narrow because the liquid crystal molecules are aligned vertically by the electric field perpendicular to the substrate.
"To solve such a narrow viewing angle problem, a new technology, such as an in-plane switching (IPS) mode LCD device, has been proposed. In an IPS mode LCD device, when a voltage is applied to an electrode, an in-plane electric field, which is a horizontal field with respect to a substrate, is formed to align liquid crystal molecules horizontally to obtain wide viewing angle characteristics.
"FIG. 1 is a plan view illustrating a portion of a thin film transistor array substrate of an in-plane switching mode liquid crystal display device according to the related art. In FIG. 1, a TFT array substrate includes a gate line 16 and a data line 17 formed thereon crossing each other, thereby defining a pixel region. In the pixel region, a plurality of common electrodes 8 for switching liquid crystal molecules and a plurality of pixel electrodes 18 are alternately disposed parallel to the data line 17 to generate in-plane electric field on the array substrate. The pixel electrodes 18 are electrically connected to each other by a pixel electrode line 18L via first contact holes 40A, and the common electrodes 8 are electrically connected to each other by a common electrode line 8L via second contact holes 40B. The pixel electrode line 18L and the common electrode line 8L are disposed parallel to the gate line 16.
Most Popular Stories
- AIG to Create 230 Jobs in Charlotte
- 15 Myths That Could Ruin Your Hispanic Ad Campaign
- Russia Says Nyet to Canada North Pole Claim
- General Motors Names Mary Barra as First Female CEO
- Bipartisan Negotiators Reach Modest Budget Agreement
- Justin Bieber Visits Typhoon Victims, Plays Concert
- Senate Dems Move Forward With Obama Nominees
- New Obama Aide to Focus on Climate Change
- Obama Nominee Confirmed for D.C. Appeals Court
- MasterCard to Split Shares, Raise Dividend