Sharp Kabushiki Kaisha Corporation

Kao Corporation

Sanyo Vacuum Industries Co. Ltd.

Hiroshi Takanashi

Kenji Misono

Makoto Iwamoto

Shunsei Fukuchi

Kyouhei Isohata

Masami Ogura

Kazuhiko Akimoto

Mitsuaki Shioji

Hiroshi Fukutani

Kunihiko Ito

Toshihiro Matsumoto

Tohru Okuda

Katsuhiko Rindo

Akira Yoshimatsu

Tadashi Nishimori

Masayuki Yamanaka

Masahiro Tanimoto

Shoichiro Takahara

Kenji Yasutake

Yasuhiro Inamasu

A glass substrate having the first through fourth thin films formed thereon and a glass substrate having the fifth through seventh thin films formed thereon are bonded to each other with the thin-film forming surfaces facing each other through a seal member that is located at the surrounding portion of the substrates. Seal-portion spacers, which are to be mixed in the seal member, are made of glass beads with a spherical particle shape, and the rate thereof to the seal material is set to 7 to 20 Wt %. Further, the particle diameter of the spherical-shaped spacers is represented by (the layer thickness A of a liquid crystal layer)+(the total thickness B+B' of various thin films located within the effective display area)-(the total thickness C+C' of various thin films located in a seal portion)+(0.1 to 0.2 .mu.m). It becomes possible to eliminate irregularities in luminance in the vicinity of the effective display area, and consequently to provide a liquid crystal display element that meets the recent demands for high display quality of STN color liquid crystal display elements.

Liquid crystal display element

There is provided a plastic liquid crystal display device in which an aligning film processing can be carried out at 150 to 180.degree. C. and which can have optical characteristics comparable to those of the conventional glass substrate liquid crystal display device. The plastic liquid crystal device comprises a pair of plastic substrates, transparent electrodes, insulating films for protecting the electrodes, aligning films and a liquid crystal, wherein the aligning film is an aligning film which is formed by dissolving a high-temperature sintering organic polymer aligning film made of polyimide or a polyimide-like substance in a solvent, printing a resulting solution thereof on a substrate, removing only the solvent by heating and/or heating under reduced pressure, and sintering the substrate at 200.degree. C. or less.

Plastic substrate liquid crystal display device, method of making, and

A liquid crystal display device has a liquid crystal layer having super twisted nematic liquid crystal with a twist angle of 260.degree., the liquid crystal layer being sandwiched between a first substrate and a second substrate. A color filter is formed on the second substrate. The first substrate is orientation-processed so that pretilt angles of the liquid crystal to the first substrate are 5.5.degree.. The second substrate is orientation-processed so that pretilt angles of the liquid crystal to the second substrate are 3.0.degree.. Therefore, it is possible to easily reduce occurrence rate of inadequate display and, at the same time, to maintain beneficial characteristics of a liquid crystal display device with a twist angle of 250.degree. or more, i.e., a good temperature characteristic, a small contrast change against a temperature change, and good quality display.

Liquid crystal display device

A color filter is formed on one surface of one of a pair of light-transmitting substrates and an organic overcoat film for smoothing is formed on the color filter. In addition, a metallic or silicon nitride film such as SiNx and a metallic or silicon oxide film such as SiOx are formed thereon in this order before forming the ITC film. The formation of the metallic or silicon nitride film and the metallic or silicon oxide film enhances the adhesion of the ITC film.

Color liquid crystal device with organic smoothing layer over ITO

A plastic liquid crystal display device having top coats (insulating films) which can be set at 200.degree. C. or less without resort to ultraviolet light and have appreciable flexibility. The plastic liquid crystal display device comprises a pair of plastic substrates, transparent electrodes, insulating films for protecting the transparent electrodes, aligning films and a liquid crystal, wherein the insulating film (top coat) is formed by dispersing any one of acryl-silanic resin, epoxy-silanic resin and silanic resin in a solvent to provide a solution, coating the solution on the transparent electrode and sintering a resulting coating at 200.degree. C. or less.

Plastic liquid crystal display device

A method of producing a liquid crystal display device comprising the steps of opposing two substrates, which are composed of a transparent electrode formed on a plastic substrate, with a specified space therebetween, sealing the circumferential ends of the substrates with a sealant so as to form a sealed space, and injecting a liquid crystal to the sealed space, wherein a degassing treatment is conducted by heating each of the substrates or the sealed substrates in a vacuum atmosphere to release gas adsorbed on the surface of the substrates prior to the step of forming the transparent electrode, the sealing step or the injection step of the liquid crystal.

Method of producing liquid crystal display device including degassing

First and second transparent hard plastic substrates are placed one over the other to form therebetween a gap into which a liquid crystal is to be sealed in. The first and second substrates are mounted on the reference plane of a stage. The distance between the first substrate and the reference plane is measured in a non-contact manner at a plurality of measuring points on a predetermined dividing line. Based on the distances measured, a slit is formed on the first substrate by cutting the first substrate along the dividing line while leaving a portion of a predetermined thickness uncut. The first substrate is then broken along the slit. With this arrangement, it is possible to cut the substrates while leaving a portion of an appropriate thickness uncut irrespective of unevenness of the thickness or waviness of the first substrate. Moreover, since the surfaces of the cut sections of the substrates do no crack and since the portions of the substrates to be broken have a reduced thickness, the divided sections have smoother surfaces.

Method for dividing substrates of liquid crystal displays using repeated

In a color liquid crystal display device, the shape of a color filter cannot be seen and coloring of areas other than a display area due to leaking light is prevented. By making a first and second segment electrodes in a two layer construction, it becomes possible to display two different display image planes in different colors with only the single layer type color liquid crystal display device. Further, sufficient contrast can be obtained by using a liquid crystal element for compensation. It is also possible to display two kinds of display image planes, namely a color display image plane and a black and white display image plane. Two kinds of color display image planes can be displayed because the color liquid crystal display device is made in a two layered construction. A so-called normally black display and normally white display can be switched. Further, when the display state is switched between normally black display and normally white display, the background color changes and it is possible to maintain the same display color. Further display colors can be doubled as compared to the example of the prior art.

Two celled color liquid crystal display device

A plastic-substrate liquid crystal display device has, on inner faces of a pair of plastic substrates 3 for sandwiching liquid crystals 10, a hard coat 4 made of an organic material, an SiOx undercoat 5, and an ITO electrode 6 in this order. Boron (B) is contained in the material of the hard coat 4. It is thus possible to enhance the adhesion property of the SiOx undercoat 5 and the ITO electrode 6 with respect to the substrate 3 and to prevent the occurrence of cracks therein.

Plastic-substrate liquid crystal display device with a hard coat

A liquid crystal display having a structure such that two sheets of substrates each provided with a transparent electrode and an orientation film are disposed opposite to each other through a spacer particle, which has an elastic modulus in compression of 370 to 550 kg/mm.sup.2 at the 10% displacement of the particle diameter, and a liquid crystal layer is also provided. As a result of this structure for the liquid crystal display, a uniform display quality can be realized through a reduction in the cell gap deviation caused when use is made of a thin sheet substrate.

Liquid crystal display with spacer having elastic modulus in compression

A color liquid crystal display device in which a color filter is provided over the entire surface of the glass substrate. In a first embodiment, display electrodes extend over a plurality of color filter sectors to form segment electrodes. In a second embodiment, the transmissivity of light passing through the liquid crystal layer can be varied in levels by making the display electrodes in two-layer, operating voltage on each of the electrodes independently, and varying in levels the amplitude of voltage applied on the liquid crystal layer by the display electrodes. In a third embodiment, the amount of light transmitted in the display area of a color filter sector is controlled by two or more display electrodes which divide up the display area.

Color liquid crystal display device

A pair of polarizers are respectively attached to a pair of substrates forming a twisted nematic field effect mode liquid crystal display. An orientation control film is disposed on each of the pair of substrates to orient liquid crystal molecules of a liquid crystal material in a desired direction. Each of the pair of polarizers is attached to an outer surface of the respective substrates such that the plane of polarization of each of the polarizers is not in parallel with or perpendicular to a direction oriented by the orientation control film.

Growing community of inventors

Souraku, Japan

Hiroshi Takanashi