Abstract: In an IPS-type transflective liquid crystal display device in which reflective portions of sub pixels possess a normally white characteristic, contrast of the reflective portions can be enhanced.

Abstract: The present invention provides a liquid crystal display device having a liquid crystal display panel in which a liquid crystal material is held between a first substrate and a second substrate. Liquid crystal molecules are aligned in a direction vertical to a surface of the substrate when a display is made in black; the second substrate has a first counter electrode; the first substrate has a pixel electrode, a protrusion for alignment control, and a second counter electrode having an electric potential different from an electric potential in the pixel electrode and different from an electric potential in the first counter electrode when a display is made in black; and the pixel electrode has a slit or an opening at a position where the protrusion for alignment control is formed, and the second counter electrode extends at a position overlapping the slit or the opening of the pixel electrode.

Abstract: Below a transparent pixel electrode, an opaque pixel electrode is arranged while sandwiching an insulation film between the transparent pixel electrode and the opaque pixel electrode. A common electrode is arranged below the opaque pixel electrode thus forming a holding capacitance between the common electrode and an opaque metal electrode. In case when the pixel is divided into four or more portions, an interval between the pixel electrode and the common electrode is set to an unequal pitch size or an unequal electrode width within one pixel.

Abstract: The present invention lowers leaking of light at the time of performing a black display of VA-type liquid crystal display device and, at the same time, prevents lowering of a numerical aperture. In a liquid crystal display device having a liquid crystal display panel which sandwiches a liquid crystal material between a first substrate having a pixel electrode and a second substrate having a counter electrode, the second substrate includes an orientation control projection which is formed by forming a conductive film on the second substrate, by forming an insulation film on the conductive film and, thereafter, by patterning the insulation film, and a light shielding layer which is formed by patterning the conductive film using the orientation control projection as a mask.

Abstract: A liquid crystal display device that includes a first substrate, a second substrate, and a liquid crystal material sandwiched between the first and second substrates. In the device, the first substrate includes an active element, a first insulation film formed above the active element, a first electrode formed above the first insulation film, a second insulation film formed above the first electrode, and a second electrode formed above the second insulation film.

Abstract: A pair of electrodes which constitute an upper layer and a lower layer with respect to an interlayer insulation film are formed as different layers at respective pixel regions on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal. At two pixel regions which are selected from the respective pixel regions, the height of background layers on which the electrodes which constitute the lower layers with respect to the interlayer insulation films are formed differs with respect to a surface of one substrate. The film thickness of the interlayer insulation film is set small with respect to the high background layer out of respective background layers which differ in height and is set large with respect to the low background layer out of respective background layers which differ in height.

Abstract: 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.

Abstract: The present invention provides a liquid crystal display device which exhibits the excellent wide viewing angle characteristic and the high-speed responsiveness. A pixel region includes a switching element which is operated in response to a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied through a switching element, and a counter electrode which generates an electric field between the counter electrode and the pixel electrode. The pixel region is constituted of divided respective regions.

Abstract: In a TFT type liquid crystal display device comprising first and second transparent substrates and a liquid crystal layer which is sandwiched between the first and second substrates, the first substrate includes a plurality of video signal lines, a plurality of scanning signal lines and a plurality of pixel regions which are formed as regions surrounded by the video signal lines and the scanning signal lines, each pixel region includes at least one active element, one pixel electrode and one common electrode, and color filter layers are formed between the pixel electrodes and the liquid crystal layer. The liquid crystal display device is substantially characterized in that the common electrodes are formed as layers above the color filters, the pixel electrodes are formed as layers below the color filters, and the color filters are superposed at least on the whole surfaces of the pixel electrodes in the pixel region.

Abstract: A display device such as liquid crystal display device which restrains the entrance of static electricity into a scanning signal driver circuit or a video signal driver circuit includes a pair of substrates, a signal line, a capacitance line and a counter voltage line formed on one substrate of the pair of substrate, a pixel including a thin film transistor connected to the signal line, a pixel electrode connected to the thin film transistor and a counter electrode connected to the counter voltage line, a driver circuit formed on the one substrate and connected to the signal line and an interconnection layer disposed between the pixel and the driver circuit. At least one of the capacitance line and the counter voltage line is connected to the interconnection layer between the driver circuit and the pixel.

Abstract: A liquid crystal display device includes at least a common electrode line, a common electrode and a pixel electrode in each pixels, the common electrode line comprising a first common electrode line which extends in the extending direction of the gate lines and a second common electrode line which extends in the extending direction of the drain lines in the pixel region, the first common electrode line and the second common electrode line are spaced apart from each other by way of a first insulating film, the first common electrode line and the second common electrode line are connected via an opening portion formed in the first insulating film, and a second insulating film is formed over the opening portion.

Abstract: In a TFT type liquid crystal display device comprising first and second transparent substrates and a liquid crystal layer which is sandwiched between the first and second substrates, the first substrate includes a plurality of video signal lines, a plurality of scanning signal lines and a plurality of pixel regions which are formed as regions surrounded by the video signal lines and the scanning signal lines, each pixel region includes at least one active element, one pixel electrode and one common electrode, and color filter layers are formed between the pixel electrodes and the liquid crystal layer. The liquid crystal display device is substantially characterized in that the common electrodes are formed as layers above the color filters, the pixel electrodes are formed as layers below the color filters, and the color filters are superposed at least on the whole surfaces of the pixel electrodes in the pixel region.

Abstract: A liquid crystal display device includes a liquid crystal display panel having respective pixels which are allocated to red, green and blue and a light source which allows light to pass through the respective pixels, wherein the light source is constituted of a plurality of red light emitting elements, a plurality of green light emitting elements and a plurality of blue light emitting elements. The liquid crystal display device further includes pixels which have the largest light transmitting quantity out of the respective pixels allocated to red, green and blue, and the number of light emitting elements of color corresponding to color which is allocated to the pixels having the largest light transmitting quantity is smaller than the number of light emitting elements of other color.

Abstract: A liquid crystal display of a transflective IPS system in which a lateral electric field is applied to a liquid crystal layer. Polarization films are arranged on the entire surface of a transmissive display unit and a reflective display unit in a manner similar to a transmissive IPS system. An inner retardation layer whose retardation is equal to a half wave is formed in the reflective display unit. A retardation of the liquid crystal layer of the reflective display unit is set to a quarter wave. Thus, a reflective display can be performed in a wide range of environment from a light place to a dark place and a transmissive display of a wide viewing angle and high picture quality can be performed.

Abstract: A display device such as liquid crystal display device which restrains the entrance of static electricity into a scanning signal driver circuit or a video signal driver circuit includes a pair of substrates, a signal line, a capacitance line and a counter voltage line formed on one substrate of the pair of substrate, a pixel including a thin film transistor connected to the signal line, a pixel electrode connected to the thin film transistor and a counter electrode connected to the counter voltage line, a driver circuit formed on the one substrate and connected to the signal line and an interconnection layer disposed between the pixel and the driver circuit. At least one of the capacitance line and the counter voltage line is connected to the interconnection layer between the driver circuit and the pixel.

Abstract: In a liquid crystal display device, a capacitance element uses a semiconductor layer as one electrode and is formed between the semiconductor layer and a storage capacitance line with an insulating film interposed therebetween, and a voltage which constantly brings a MOS type transistor into an ON state is applied to the storage capacitance line.

Abstract: A liquid crystal display of a transflective IPS system in which a lateral electric field is applied to a liquid crystal layer. Polarization films are arranged on the entire surface of a transmissive display unit and a reflective display unit in a manner similar to a transmissive IPS system. An inner retardation layer whose retardation is equal to a half wave is formed in the reflective display unit. A retardation of the liquid crystal layer of the reflective display unit is set to a quarter wave. Thus, a reflective display can be performed in a wide range of environment from a light place to a dark place and a transmissive display of a wide viewing angle and high picture quality can be performed.

Abstract: Below a transparent pixel electrode, an opaque pixel electrode is arranged while sandwiching an insulation film between the transparent pixel electrode and the opaque pixel electrode. A common electrode is arranged below the opaque pixel electrode thus forming a holding capacitance between the common electrode and an opaque metal electrode. In case when the pixel is divided into four or more portions, an interval between the pixel electrode and the common electrode is set to an unequal pitch size or an unequal electrode width within one pixel.

Abstract: The present invention provides a transmission-type, partial-transmission-type or a semi-transmission-reflection-type lateral electric field driving liquid crystal display device which can obtain the favorable transmissivity even when a circulatory polarized light is incident on a liquid crystal layer from a back surface side.

Abstract: A pair of electrodes which constitute an upper layer and a lower layer with respect to an interlayer insulation film are formed as different layers at respective pixel regions on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other in an opposed manner by way of liquid crystal. At two pixel regions which are selected from the respective pixel regions, the height of background layers on which the electrodes which constitute the lower layers with respect to the interlayer insulation films are formed differs with respect to a surface of one substrate. The film thickness of the interlayer insulation film is set small with respect to the high background layer out of respective background layers which differ in height and is set large with respect to the low background layer out of respective background layers which differ in height.