Patent application number | Description | Published |
20090103025 | Liquid crystal display device - The present invention realizes an IPS liquid crystal display device which exhibits small directivity of viewing angle and high brightness. Below a pixel electrode having a comb-teeth-shaped electrode and having a laterally-extending trapezoidal profile, a planar common electrode not shown in the drawing is formed by way of an insulation film. When a video signal is applied to the pixel electrode, an electric field is generated between the pixel electrode and the common electrode via slit portions formed in the pixel electrode thus controlling liquid crystal molecules. The pixel electrodes are arranged in a packed state by alternately reversing the direction of the trapezoidal shape in the longitudinal direction. Since a light blocking film is not present between two pixel electrodes arranged adjacent to each other in the longitudinal direction, the liquid crystal display device can acquire high transmissivity. As a result, a liquid crystal display device having high brightness can be realized. | 04-23-2009 |
20090115712 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, and a Positive liquid crystal sandwiched between the first and second substrates. The liquid crystal display panel includes a plurality of sub pixels which include a first electrode and a second electrode formed on the first substrate. The liquid crystal display panel is configured to drive the liquid crystal by generating an electric field using a difference in potential between the first electrode and the second electrode. The first substrate includes a first alignment film, a plurality of video lines, and a first polarizer, and the second substrate includes a second alignment film, and a second polarizer. Relationships exist among extension directions of the video lines and directions of alignment axis orthogonal thereto, of the alignment films a polarization axis of at least one of the polarizer, and angles therebetween. | 05-07-2009 |
20090115946 | Liquid crystal display device - An absorption axis of a polarizer on a viewer's side is set to an arbitrary direction to cope with problems attributed to polarization sunglasses or the like. Video lines extend in a reference direction as a whole while being bent locally. Assuming a narrow-side angle out of intersection angles between the reference direction and the extension direction of a portion of the video line as θ | 05-07-2009 |
20090185123 | Liquid crystal display device - In an IPS type liquid crystal display device, it is attempted to improve display quality. In the IPS type liquid crystal display device, in the case where a liquid crystal layer is of a positive liquid crystal, a counter electrode is divided for each display line. When two adjacent display lines are defined as one display line and the other display line, respectively, a gap between the counter electrode of the one display line and the counter electrode of the other display line extends in a direction of the display line as a whole while bending locally. The gap has a first portion extending along an extending direction of a video line and a second portion extending from the first portion along a direction crossing the video line. An initial alignment axis of the liquid crystal layer is in a direction within a range of +5° to +20° or −5° to −20° clockwise with respect to the video line. When an angle measured clockwise from the initial alignment axis of the liquid crystal layer to the second portion of the gap is θ1, a relation of 88°≦θ1≦92° is satisfied. The video line is formed of a light-shielding material, and the first portion of the gap is planary overlapped with the video line. | 07-23-2009 |
20090207364 | Liquid crystal display device - A liquid crystal display device which can enhance optical transmissivity is provided. One pixel region is divided into a first pixel region, a second pixel region and a third pixel region in order from one video signal line to another video signal line, the first pixel region and the third pixel region adopt the so-called IPS-Pro type structure, and the second pixel region adopts the so-called IPS structure in narrow meaning. A line width of linear electrode in the second pixel region is set to 2.5 μm or less. | 08-20-2009 |
20100002162 | Liquid Crystal Display Device - A liquid crystal display device includes pixels A and pixels B, wherein a width BB of the pixel B is smaller than a width AA of the pixel A. A pixel electrode formed in the pixel B is smaller than a pixel electrode formed in the pixel A in area and hence, capacitance formed between the pixel electrode and a counter electrode which is formed below the pixel electrode with an insulation film sandwiched therebetween becomes small. To eliminate this difference in capacitance, a first branch electrode and a second branch electrode are formed on the pixel electrode of the pixel B thus increasing capacitance between the pixel electrode and the counter electrode. Due to such a constitution, it is possible to prevent the deterioration of image quality attributed to imbalance of capacitance. | 01-07-2010 |
20100002174 | Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view - The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor. | 01-07-2010 |
20110025961 | Transflective liquid crystal display device - A transflective liquid crystal display device with improved display quality in which the liquid initial alignment direction of the liquid crystal layer is in a direction perpendicular to the extending direction of a clearance between the counter electrode of a transmission portion and a counter electrode of a reflection portion or in a direction within a range of ±2° in the clockwise direction perpendicular to the extending direction of the clearance in a case where the liquid crystal layer comprises positive type liquid crystals, or the liquid crystal initial alignment direction of the liquid crystal layer is in a direction parallel with the extending direction of a clearance, or a direction within a range of ±2° in the clockwise direction relative to the extending direction of the clearance in a case where the liquid crystal layer comprises negative type liquid crystals. | 02-03-2011 |
20110176094 | Transflective Liquid Crystal Display Device - A transflective liquid crystal display device including a liquid crystal display panel which includes a pair of substrates; liquid crystal which is sandwiched between the pair of substrates; a plurality of sub pixels each of which includes a transmissive portion and a reflective portion, each sub pixel having a pixel electrode formed on one substrate out of the pair of substrates and a counter electrode formed on the one substrate, the pixel electrode being arranged in common in the transmissive portion and the reflective portion and the counter electrode being arranged individually in the transmissive portion and the reflective portion in one sub pixel, the pixel electrode and the counter electrode generating an electric field therebetween thus driving the liquid crystal. The liquid crystal display panel includes color filters having different lengths or different shape portions, for example. | 07-21-2011 |
20110234958 | Transflective liquid crystal display device - To improve display quality in a transflective liquid crystal display device. | 09-29-2011 |
20110234959 | Liquid crystal display device having rectangular-shaped pixel electrodes overlapping with comb-shaped counter electrodes in plan view - The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor. | 09-29-2011 |
20120133877 | Liquid Crystal Display Device Having Rectangular-Shaped Pixel Electrodes Overlapping with Comb-Shaped Counter Electrodes in Plan View - The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor. | 05-31-2012 |
20120200813 | Liquid Crystal Display Device - A liquid crystal display device includes a first substrate on which pixels having a thin film transistor are formed in regions surrounded by scanning lines and video signal lines, a second substrate which faces the first substrate and having color filters and light blocking films formed thereon, and a liquid crystal layer which is sandwiched between the first substrate and the second substrate. The thin film transistor has a gate electrode connected to the scanning line, a drain electrode connected to the video signal line and a source electrode connected to a pixel electrode. The pixels include first pixels having a first width and second pixels having a second width smaller than the first width. The pixel electrode of the second pixel has a branch electrode extending from the pixel electrode with at least a portion of the branch electrode overlapping the video signal line or the scanning line. | 08-09-2012 |
20120224131 | Liquid Crystal Display Device - In the step of curing a resin for bonding a TFT substrate and a counter substrate each having an alignment film that has been optically aligned by using UV-light, damage to the alignment film due to the UV-light can be prevented without using a light shielding mask. | 09-06-2012 |
20130070177 | LIQUID CRYSTAL DISPLAY DEVICE HAVING RECTANGULAR-SHAPED PIXEL ELECTRODES OVERLAPPING WITH COMB-SHAPED COUNTER ELECTRODES IN PLAN VIEW - The present invention realizes a bright image display by enhancing a numerical aperture of pixels. At least a portion of a pixel electrode is overlapped to a thin film transistor by way of a first insulation film, the pixel electrode is connected to an output electrode of the thin film transistor via a contact hole which is formed in the first insulation film, the counter electrode is arranged above the pixel electrode by way of a second insulation film in a state that the counter electrode is overlapped to the pixel electrode, the counter electrode is formed at a position avoiding the contact hole formed in the first insulation film as viewed in a plan view, and at least a portion of the counter electrode is overlapped to the thin film transistor. | 03-21-2013 |
20140043551 | LIQUID CRYSTAL DISPLAY DEVICE - In the step of curing a resin for bonding a TFT substrate and a counter substrate each having an alignment film that has been optically aligned by using UV-light, damage to the alignment film due to the UV-light can be prevented without using a light shielding mask. A UV-light absorption layer is formed between each black matrix on the counter substrate. The TFT and counter substrates are sealed at their periphery by a resin that is cured by UV-light radiated from the counter substrate side. Since the absorption layer has a high absorbability to UV-light at a wavelength of 300 nm or less that degrades the alignment film, damage to the alignment film due to the UV-light for curing the resin can be prevented. Thus, provision of a light shielding mask for shielding the UV-light for the display region can be saved. | 02-13-2014 |
20150070636 | LIQUID CRYSTAL DISPLAY DEVICE - In the step of curing a resin for bonding a TFT substrate and a counter substrate each having an alignment film that has been optically aligned by using UV-light, damage to the alignment film due to the UV-light can be prevented without using a light shielding mask. A UV-light absorption layer is formed between each black matrix on the counter substrate. The TFT and counter substrates are sealed at their periphery by a resin that is cured by UV-light radiated from the counter substrate side. Since the absorption layer has a high absorbability to UV-light at a wavelength of 300 nm or less that degrades the alignment film, damage to the alignment film due to the UV-light for curing the resin seal material can be prevented. Thus, provision of a light shielding mask for shielding the UV-light for the display region can be saved. | 03-12-2015 |