4774 results about "Liquid crystal molecule" patented technology

The purpose is to provide an active-matrix liquid crystal display device using a in-plane field type having wide viewing angle characteristics with homogeneous color tones, capable of realizing characristics equal to those of a CRT.In this active-matrix liquid crystal display device of the present invention, liquid crystal molecules of the liquid crystal layer have at least two kinds of driving (reorientation) directions by electric field over the substrate surface.

A liquid crystal composition comprises liquid crystal molecules and an alignment promoter. The alignment promoter is represented by the formula (I). <paragraph lvl="0"><in-line-formula>(Hb-L1-)nBl (I) </in-line-formula>In the formula (I), Hb is an aliphatic group having 4 to 40 carbon atoms, an aromatic group having 6 to 40 carbon atoms or an aliphatic substituted oligosiloxanoxy group having 1 to 40 carbon atoms. L1 is a single bond or a divalent linking group, and n is an integer of 2 to 12. Bl is an n-valent group comprising at least two rings.

In a semi-transmissive liquid crystal display device having a reflective region 5 and a transmissive region therein, a one-half wavelength plate 29 is disposed between a lower substrate 11 and a polarizer 21a provided on a side of the lower substrate. This makes liquid crystal molecules in at least the transmissive region 6 driven by a horizontal electric field and allows the device to operate in a normally-black mode in both the reflective region 5 and the transmissive region 6, realizing a semi-transmissive liquid crystal display device having wide viewing angle characteristics.

A circularly polarizing plate comprises a linearly polarizing membrane and a quarter wave plate. The quarter wave plate comprises an optically anisotropic layer A and an optically anisotropic layer B. The quarter wave plate has such an optical characteristic that a retardation value essentially is a quarter of a wavelength when the retardation value is measured at the wavelength of 450 nm, 550 nm and 650 nm. One of the optically anisotropic layers A and B is a layer made from liquid crystal molecules, and the other is a polymer film or a layer made from liquid crystal molecules.

It is an object of the present invention to provide a liquid crystal display device which has a wide viewing angle and less color-shift depending on an angle at which a display screen is seen and can display an image favorably recognized both outdoors in sunlight and dark indoors (or outdoors at night). The liquid crystal display device includes a first portion where display is performed by transmission of light and a second portion where display is performed by reflection of light. Further, a liquid crystal layer includes a liquid crystal molecule which rotates parallel to an electrode plane when a potential difference is generated between two electrodes of a liquid crystal element provided below the liquid crystal layer.

A liquid crystal display device according to the present invention is constituted of a TFT substrate and an opposing substrate which are arranged so as to be opposite to each other with a liquid crystal layer interposed therebetween. In addition, in the liquid crystal layer, formed is a polymer into which a polymer component added to liquid crystal is polymerized, and which determines directions in which liquid crystal molecules tilt when voltage is applied. In the TFT substrate, formed are a sub picture element electrode directly connected to a TFT and a sub picture element electrode connected to the TFT through capacitive coupling. In each of these sub picture element electrodes, formed are slits extending in directions respectively at angles of 45 degrees, 135 degrees, 225 degrees and 315 degrees to the X axis.

A liquid crystal display device includes a display panel and a viewing angle control panel. The viewing angle control panel includes a pair of substrates, a liquid crystal layer interposed between the pair of substrates, and a pair of electrodes for applying an electric field to the liquid crystal layer. The liquid crystal layer is composed from hybrid-aligned liquid crystal molecules. The viewing angle of the display panel is controlled by changing an alignment state of the hybrid-aligned liquid crystal molecules in the liquid crystal layer by voltage applied by the electrodes.

A liquid crystal display device, in which the liquid crystal molecules are aligned vertically when no voltage is applied, includes pixels each having plural sub-pixel electrodes, a data bus drive circuit for applying drive signals to the sub-pixel electrodes via a data bus line and a switching element, and alignment regulation structure for regulating the direction of alignment of liquid crystal molecules. The first and second sub-pixel electrodes have different areas. The data bus drive circuit applies a first drive signal, which causes luminance to change from minimum to maximum for an increase of input grayscale of image signal, to the first sub-pixel electrode, and a second drive signal, which causes the luminance to be lower than the first drive signal, to the second sub-pixel electrode.

The method of the present invention turns off the line of LEDs of a backlight module behind the currently enabled scanline of a LCD device so that the transient behavior of the liquid crystal molecules are less obvious, thereby enhancing the dynamic response of the LCD device. For one type of embodiments, in accordance with the top-down scanning of the LCD device, the corresponding horizontal lines of the LEDs of the backlight module are turned off in a certain manner so that they exhibit a lighting (or, more precisely, darkening) pattern as if they are also “scanned” from top to down. For another type of embodiments, the horizontal lines of the LEDs of the backlight module are turned off and on simultaneously so that the backlight module actually “flashes” the LCD device.

A display panel includes an array substrate and an opposite substrate. The array substrate includes a plurality of data lines, a plurality of gate lines, a plurality of first signal lines, a plurality of second signal lines and a plurality of pixels. Each of the pixels includes a pixel electrode and a common electrode insulated from the pixel electrode. The opposite substrate includes a plurality of connecting members. At least one of the connecting members is electrically connected to at least one of the first signal lines and the second signal lines by an externally provided pressure. Thus, when an externally provided pressure is applied to the display panel in order to perform a touch screen function, an alignment of the liquid crystal molecules disposed on the array substrate may not be substantially changed, and a display quality may be improved.

A liquid crystal display device is provided, including a liquid crystal layer interposed between a first display panel and a second display panel; and an alignment film formed on at least one of the first and second display panels, the alignment film including first polysiloxanes and second polysiloxanes disposed on the first polysiloxanes, wherein a first portion of silicon atoms of the second polysiloxanes are bonded to vertical functional groups interacting with liquid crystal molecules in the liquid crystal layer, and to first pre-tilting functional groups aligning the liquid crystal molecules in the liquid crystal layer to be tilted with respect to at least one of the first and second display panels by being cross-linked. The bonding structure of the first and the second polysiloxanes being different.

A display device includes: a first panel having a pixel region including a pixel electrode therein; a second panel having a common electrode facing the first panel; a liquid crystal layer having vertically aligned liquid crystal molecules interposed between the first and second panels; a first alignment layer disposed on the pixel electrode; and a second alignment layer disposed on the common electrode. At least one of the pixel electrode and the common electrode has a micro slit pattern. At least one of the first and second alignment layers divides the pixel region into domains, is formed to have pretilt directions corresponding to a given domain, and pretilts the vertically aligned liquid crystal molecules in the given domain. A direction of summed horizontal components of a fringe field at an edge of the pixel region is substantially equal to a direction of summed horizontal components of a pretilt direction of the at least one of the first and second alignment layer.

A liquid crystal display panel, including: a pixel electrode formed on a first substrate; an alignment layer formed on the pixel electrode, wherein the alignment layer includes an alignment layer material and aligns first liquid crystal molecules in a direction substantially perpendicular to the pixel electrode; and a photo hardening layer formed on the alignment layer, wherein the photo hardening layer includes a photo hardening layer material and aligns second liquid crystal molecules to be tilted with respect to the pixel electrode, wherein the alignment layer material and the photo hardening layer material have different polarities from each other.

A novel liquid crystal display is disclosed. The display comprises a pair of substrates disposed facing each other and at least one of which has an electrode, a liquid-crystal layer being sandwiched in between the pair of substrates and comprising liquid-crystal molecules aligned along with a first alignment axis and a second alignment axis respectively formed on facing surfaces of the first and second substrates, a pair of polarizing plates disposed sandwiching the liquid-crystal layer, and at least an optically anisotropic layer disposed between the liquid-crystal layer and either of the polarizing plates, and comprising at least one liquid crystal compound which is aligned along with a third alignment axis and is fixed in the alignment state. And their disposition satisfies at least one of Condition (1): the alignment axes of the substrates are not parallel to transmission axes of the polarizing plates; and Condition (2): the alignment axis of the substrate is not parallel to the alignment axis of the optically anisotropic layer.

An optical compensatory sheet comprises an optically anisotropic layer formed of discotic liquid crystal molecules provided on a transparent substrate. The liquid crystal molecules are horizontally aligned in the optically anisotropic layer. An average inclined angle between discotic planes of the discotic liquid crystal molecules and a surface of the transparent substrate is less than 5°. The discotic liquid crystal molecules are fixed in the optically anisotropic layer while keeping the horizontal alignment.

The invention has an object to provide a liquid crystal display in which a wide angle of view is obtained and a response time at a halftone can be shortened by regulating an alignment orientation of a liquid crystal by the use of a polymer fixation system in which a liquid crystal layer containing a polymerizable component is sealed between substrates, and the polymerizable component is polymerized while a voltage is applied to the liquid crystal layer to fix a liquid crystal alignment. A liquid crystal layer containing a polymer for regulating a pretilt angle of a liquid crystal molecule and a tilt direction at a time of driving is sealed between two substrates arranged opposite to each other. A plurality of stripe-like electrode patterns in which a pattern width is formed to be wider than a width of a space, are arranged so that the liquid crystal molecule is aligned in a longitudinal direction of the pattern when the polymer is formed by solidifying a polymerizable component mixed in the liquid crystal layer while a voltage is applied to the liquid crystal layer.

A polarization grating includes a substrate and a first polarization grating layer on the substrate. The first polarization grating layer includes a molecular structure that is twisted according to a first twist sense over a first thickness defined between opposing faces of the first polarization grating layer. Some embodiments may include a second polarization grating layer on the first polarization grating layer. The second polarization grating layer includes a molecular structure that is twisted according to a second twist sense that is opposite the first twist sense over a second thickness defined between opposing faces of the second polarization grating layer. Also, a switchable polarization grating includes a liquid crystal layer between first and second substrates. The liquid crystal layer includes liquid crystal molecules having respective relative orientations that are rotated over a thickness defined between opposing faces thereof by a twist angle that is different from a relative phase angle between respective first and second periodic alignment conditions of the first and second substrates. Related devices and fabrication methods are also discussed.

A viewing angle switchable display apparatus including a display panel, an electrically controlled viewing angle switching device, an electrically controlled light scattering switching device, and a backlight module is provided. The electrically controlled viewing angle switching device includes two first transparent substrates, two first transparent conductive layers, a liquid crystal layer, and a first polarizer located on a side of the electrically controlled viewing angle switching device which is far away from the display panel. The liquid crystal layer includes liquid crystal molecules, and optical axes of the liquid crystal molecules are parallel or perpendicular to a transmission axis of the first polarizer. The electrically controlled light scattering switching device is located between the display panel and the backlight module and includes two second transparent substrates, two second transparent conductive layers, and an electronically controlled polymer material layer.

A view angle control element capable of limiting a view angle without degrading image quality (front quality) when seen from a front side and a display device provided with the view angle control element are provided. A liquid crystal display device (1) includes a liquid crystal panel (10), and a view angle control film (20) that controls a view angle of the liquid crystal panel (10). The view angle control film (20) is a laminated film including at least a liquid crystal film (21) and a linearly polarizing plate (22). In the liquid crystal film (21), liquid crystal molecules are solidified while being aligned with major axes tilted in a predetermined azimuth angle direction from a normal direction of a film surface. The linearly polarizing plate (22) of the view angle control film (20) and the linearly polarizing plate (14) of the liquid crystal panel (10) are placed so that polarization transmission axes thereof cross a major axis direction of the liquid crystal molecules when seen from the normal direction.

An electro-optical device typified by an active matrix type liquid crystal display device, is manufactured by cutting a rubbing process, and in addition, a reduction in the manufacturing cost and an improvement in the yield are realized by reducing the number of process steps to manufacture a TFT. By forming a pixel TFT portion having a reverse stagger type n-channel TFT, and a storage capacitor, by performing three photolithography steps using three photomasks, and in addition, by having a uniform cell gap by forming wall-like spacers by performing one photolithography step, without performing a rubbing process, a multi-domain perpendicular orientation type liquid crystal display device having a wide viewing angle display, and in which a switching direction of the liquid crystal molecules is controlled, can be realized.

A viewing angle control device including at least one liquid crystal panel, at least one compensation film and polarizers is provided. Each of the at least one liquid crystal panel includes two transparent conductive layers and liquid crystal molecules. The polarizers include at least one first polarizer and a second polarizer. The at least one first polarizer is located between the at least one compensation film and the at least one liquid crystal panel. The second polarizer is located at a side of the at least one liquid crystal panel, the at least one compensation film and the at least one first polarizer. When there is no potential difference between the transparent conductive layers, an optical axis of each of the liquid crystal molecules is parallel or vertical to a transmission axis of the at least one first polarizer. A viewing angle controllable display apparatus is also provided.

A liquid crystal display device with an IPS mode having wide view angle characteristic and capable of improving response time and transmittance, is disclosed. A liquid crystal display device with an in-plane switching mode includes a first substrate having first and second electrodes formed thereon. A second substrate is disposed opposite to the first substrate with a selected distance. On a surface of the second substrate are also formed third and fourth electrodes. When a voltage is applied to the respective electrodes, a first electric field which is parallel to the planes of the substrates is generated between the first electrode and the second electrode, and a second electric field which is parallel to the planes of the substrates and is orthogonal to the first electric field is generated between the third electrode and the fourth electrode. A polarizer is arranged on the outside of the first substrate and a analyzer is arranged on the outside of the second substrate. A first homogeneous alignment film is applied to the first substrate on which the first and second electrodes are formed. A second homogeneous alignment film is also applied to the second substrate on which the third and fourth electrodes are formed. A liquid crystal layer having liquid crystal molecules is interposed between the both substrates, wherein the liquid crystal molecules are arranged in a homogeneous state in an absence of the electric field and are twisted in a presence of the electric field.

The present invention discloses a liquid crystal display device which is arranged by: (A) the first substrate including a plurality of scanning lines and a plurality of signal lines arranged in a matrix form; a common signal line extended in parallel to one of the scanning lines and the signal lines, for applying a reference potential thereto; a pixel electrode; and a thin-film transistor having a source electrode connected to the pixel electrode, a drain electrode connected to the signal line, and a gate electrode connected to the scanning line, the thin-film transistor being formed in an intersection portion between the scanning line and the signal line; (B) the second substrate including a black matrix layer and positioned opposite to the first substrate with sandwiching a liquid crystal layer between the first substrate and the second substrate; and (C) an insulating layer sandwiched between the pixel electrode of the first substrate and the scanning line. While a voltage is applied between the common signal line and the pixel electrode to thereby produce an electric field, a direction of a molecular axis of liquid crystal molecules contained in the liquid crystal layer is rotated within a plane located in parallel to the first substrate so as to perform a liquid crystal display; and further said pixel electrode of the first substrate covers a portion of the scanning lines located in a region other than such a region where the thin-film transistor is formed.

A light source device has a transparent/scattering state switching element for switching the range of irradiation angles, and liquid crystal molecules and dichroic dye molecules are dispersed in a polymer matrix in the PDLC layer of the transparent/scattering state switching element. The range of irradiation angles can thereby be switched, and the color can be prevented from changing when the radiation angle is switched.