Hyundai Electronics Industries Co. Ltd.

Boe Hydis Technology Co., Ltd.

Hyundai Display Technology Inc.

Boe-hydis Technology., Ltd.

Seung Hee Lee

Hyang Yul Kim

In Cheol Park

Seung Ho Hong

Seok Lyul Lee

Youn Hak Jeong

Woo Ho Choi

Bong Gyu Rho

Jin Mahn Kim

Yun Hee Lee

Won Geon Lee

Seok Pil Lee

Sung Woon Kim

Jung Yeal Lee

Sung Hun Song

Jeong Dong Noh

Jae Geon You

Han Jun Park

Mi Sook Kim

Seung June Yi

Kyu Chang Park

Jae Hak Shin

Chi Hyuck Park

Jai Wan Koh

Jang Sick Park

Wan Yong Choi

Joon Heon Kim

Soon Ho Baek

Kyu Hwan Lim

Tae Yup Min

Seong Ho Hong

Tae Yong Eom

Hyung Il Jeon

Bong Gyu Roh

Seong Jun An

Disclosed is a method for aligning polymer network liquid crystal. In the method, alignment of liquid crystal in a bulk state is controlled by means of an orientation power of polymer material itself which is formed by irradiating linearly polarized ultraviolet rays to monomer material having an orientation power, thereby achieving a transparent state at an initial state without an orientation layer. That is, Linearly polarized ultraviolet rays are irradiated to ultraviolet-hardening type monomers having an orientation power. Alignment of liquid crystal of a bulk state is controlled while the monomers are changed to polymers, thereby achieving an initial transparent state. The molecules of the liquid crystal are placed in disorder by a vertical electric field and the horizontal orientation power of a polymer chain.

Method for aligning polymer network liquid crystal

Disclosed is a reflective liquid crystal display. The present invention provides a reflective liquid crystal display comprising: a lower substrate and an upper substrate opposed with a selected distance; a liquid crystal layer sandwiched between the lower and upper substrates and comprising a plurality of liquid crystal molecules; a gate bus line and a data bus line formed on the lower substrate to define a pixel; a counter electrode and a pixel electrode formed at an inner surface of the lower substrate, wherein both electrodes are formed with a selected distance and width so that most of the liquid crystal molecules in upper portions of those electrodes are sufficiently driven by forming a fringe field between said counter and pixel electrodes; a thin film transistor provided adjacent to an intersection of the gate bus line and the data bus line and transmitting a signal of the data bus line into the pixel electrode when the gate bus line is selected; a polarizing plate disposed at an outer surface of the upper substrate; a reflecting plate disposed at an outer surface of the lower substrate; and a quarter wave plate sandwiched between the quarter wave plate and the lower substrate, or between the polarizing plate an the upper substrate, wherein both counter and pixel electrodes are made of a transparent conductor, wherein a distance between the upper and lower substrates is greater in length than a distance between the counter and pixel electrodes.

Reflective liquid crystal display of high aperture ratio, high transmittance and wide viewing angle

A thin film transistor liquid crystal display is capable of improving a screen quality by preventing generation of residual ions in pixels. The disclosed comprises a substrate; a plurality of gate bus lines arranged to a predetermined direction on the substrate, having a gate pad unit for applying driving signals; a plurality of data bus lines cross-arranged with the gate bus lines to define a unit pixel, having a data pad unit for applying graphic signals; a thin film transistor arranged at the intersection of the data bus lines and gate bus lines; a pixel electrode arranged in the unit pixel region to be in contact with the thin film transistor; and a plurality of common bus lines arranged parallel with the gate bus lines, having a common pad unit for regularly applying common signals to pixels; and wherein a shielding line is arranged to be in contact with the common bus line and parallel with the data bus line on the outer side of pixels adjacent to the common pad unit and gate pad unit.

Thin film transistor liquid crystal display

The present invention relates to a method for forming post spacers in a liquid crystal display, which enables cell gap to be uniform by means of a half-tone mask. The method comprises the steps of: defining a active region and a dummy region in a substrate; forming a black matrix on the substrate at the outside of the active region; selectively forming a RGB resin film on the active region while selectively forming a RGB resin film on the dummy region; forming a protective film on the resulting structure; forming a photosensitive resin film on the protective film; forming a half-tone mask pattern on the photosensitive resin film; and selectively etching the photosensitive resin film using the half-tone mask pattern so as to form the post spacers having a different height.

Method for forming post spacers in liquid crystal display

High screen quality In Plane-Fringe Field Switching mode Liquid Crystal Device ('LCD') having plural gate bus and data bus line cross-arranged on a transparent substrate; common bus lines parallel with the gate bus line; thin film transistor at the intersection of the gate bus and the data bus lines; counter electrode, including a first body parallel with the data bus lines and a plurality of first branches, the end of one side being in contact with the first body, the first branches having a predetermined angle symmetric with the common bus line; and pixel electrode, including a second body parallel with the data bus line and plural second branches, the other end being in contact with the second body and the one end being extended to the upper part of the first branches, the second branches being on the same layer with the first branches, extending parallel between the first branches.

In plane fringe field switching mode LCD realizing high screen quality

A liquid crystal display device with plastic substrates is disclosed, which comprises: a subsidiary substrate, upper and lower plastic substrates including edge grooves and being fixed on the subsidiary substrate by heat resistant tapes and being joined with liquid crystals sealed there-between, and alignment layers formed on the surfaces which face one another of the upper and lower plastic substrates.

Liquid crystal display device with plastic substrate

Liquid crystal display devices having stairs type driving signal capable of preventing over-twist and improving response time properties by applying data signal of stairs type pulse signal when a gate signal is applied to drive the TFT, including upper and lower substrates with an interposed liquid crystal layer driving electrodes to drive the liquid crystals; first and second alignment layers rubbed in a first direction and in a direction parallel with the first alignment layer, respectively; first polarizing plate arranged outside of the lower substrate, forming 45&deg; angle with the first direction; and second polarizing plate outside of the upper substrate having a transmittance axis perpendicular to the first polarizing plate and forming 45&deg; angle with the first direction. A gate signal is applied to drive a thin film transistor in each pixel, and data signals having two or more stairs type pulse signals are successively applied.

Liquid crystal display device having stairs type driving signal

A liquid crystal display device capable of realizing high aperture ratio and high brightness by reducing or removing a conventional black matrix layer is provided. The device has a lower substrate and an upper substrate confronting each other. A counter electrode is formed on the lower substrate, and a pixel electrode is formed on the counter electrode with an insulating layer interposed. A lower polarizing plate and an upper polarizing plate are attached on respective outer sides of the lower and the upper substrates. The device further has a gate bus line and a data bus line. Particularly, a rubbing direction of the lower substrate corresponds with a direction of noise field formed between the data bus line and the pixel electrode or the counter electrode and between the gate bus line and the pixel electrode or the counter electrode.

Liquid crystal display device

A liquid crystal display device with spacers integrally formed at a plastic substrate. The liquid crystal display device comprises: upper and lower substrates joined with liquid crystals interposed there-between, at least one substrate of which is made of plastic; a driving electrode for the liquid crystals formed at the lower substrate; polarizers attached at respective rear surfaces of the upper and lower substrates; and spacers interposed between the upper and lower substrates to maintain cell gaps, wherein the spacers are integrally formed at the substrate, and concurrently act as posts. Also, spacers can be integrally formed at either one of the lower plastic substrate and the upper plastic substrate, or the spacers can be integrally formed at both the lower plastic substrate and the upper plastic substrate, and the spacers have a height of &ldquo;cell gap&plusmn;a&rdquo;, wherein the cell gap is 0.2 to 10 &mgr;m and &ldquo;a&rdquo; is not more than 1 &mgr;m.

Liquid crystal display device with spacers integrally formed at plastic substrate

A method of producing two domains within a liquid crystal layer by first forming two electrodes on a substrate, using a liquid crystal layer aligned vertically with respect to the substrate formed on the substrate where the substrate has two electrodes separated from each other with a selected distance. Finally, an electric field between the two electrodes is applied.

Method of producing two domains within a liquid crystal layer and liquid crystal display device

The present invention comprises an upper substrate; a data bus line and a storage capacitance bus line on a lower substrate; a gate bus line at the position of bisecting the unit pixel; a thin film transistor on the gate bus line; a counter electrode; and a pixel electrode. The pixel electrode comprises a frame shaped body unit formed on the edge in counter electrode and a plurality of slant slits arranged with a regular distance to divide the body unit into several parts, forming a predetermined angle with the gate bus line. The angle of slant slits in the pixel electrode is symmetric with respect to the gate bus line. The storage capacitance bus line is partially overlapped with both the upper edge of pixel electrode in one unit pixel and the lower edge of pixel electrode in the closest unit pixel. According to the present invention, the black matrix area is reduced by eliminating or minimizing the light leakage through modifying the pixel structure, thereby improving the aperture ration and transmittance.

Fringe field switching liquid crystal display device and method for manufacturing the same

A reflective type FFS-LCD includes: a liquid crystal layer; a first substrate formed with counter and pixel electrodes on one side of the liquid crystal layer to generate a fringer field to drive the liquid crystal molecules; a second substrate on the other side of the liquid crystal layer; a first homogeneous alignment layer near the first substrate having a rubbing axis in a selected direction; a second homogeneous alignment layer near the second substrate and having a rubbing axis in a selected direction; a polarizer having a selected polarizing axis; and a reflective plate. Retardation occurs in the liquid crystal layer by (2n&plus;1)&lgr;/4 when the liquid crystal molecules in the liquid crystal layer are driven by the fringe field.

Reflective type-fringe switching mode LCD having liquid crystal retardation (2n&plus;1)&lgr;/4

The present invention provides a Fringe Field Switching-Liquid Crystal Display comprising: an upper substrate and a lower substrate; a gate line and a data line for defining a unit pixel, a plurality of protrusion parts being respectively formed on an edge region of the gate line adjacent to a pixel electrode, each of protrusion parts of the gate line being positioned in a depression part formed between the protrusion parts of the pixel electrode; a counter electrode formed in the unit pixel; a common line for applying a common signal to the counter electrode; a pixel electrode forming an electric field with the counter electrode, a plurality of protrusion parts being formed on an edge region of the pixel electrode adjacent to the gate line, each of protrusion parts being positioned in a depression part formed between the protrusion parts of the gate line; and a liquid crystal filled between the upper substrate and the lower substrate.

Apparatus for fringe field switching liquid crystal display

Disclosed is an in-plane switching(IPS) mode liquid crystal display(LCD) to prevent generating parasitic electric field due to residual DC components and static electricity. The IPS mode LCD according to the present invention comprises a first substrate; counter electrodes formed on the first substrate; pixel electrodes formed on the first substrate and spaced apart from the counter electrodes; a first high dielectric layer formed between the counter and pixel electrodes on the first substrate in which the counter and pixel electrodes are formed; a second substrate opposed to the first substrate; and a second high dielectric layer disposed at an inner surface of the second substrate.

Growing community of inventors

Kyoungki-do, South Korea

Seung Hee Lee