Sharp Kabushiki Kaisha Corporation

Tohoku University

Yasuhisa Itoh

Kiyoshi Minoura

Kozo Nakamura

Naofumi Kimura

Yutaka Ishii

Shun Ueki

Yoshitaka Yamamoto

Tatsuo Uchida

Hiroshi Yoneda

Shigeto Yoshida

Makoto Kanbe

Takahiro Ishinabe

Tohru Kawakami

Yoshito Suzuki

Yoshihiro Hashimoto

Katsunori Ehara

Kazuhiko Tsuda

Akiyoshi Fujii

Tomoko Teranishi

Yutaka Sawayama

Masako Nakamura

Toshiki Matsuoka

Mariko Ban

Ichiroh Ihara

Kohji Taniguchi

Masumi Kubo

David James Montgomery

Atsushi Ban

Takeshi Ishida

Eiji Satoh

Masahiro Shimizu

Taimi Oketani

Masahiko Tomikawa

Eiji Sato

Kazuo Sekiya

Masahiro Nishizawa

A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2):(1+)/(1&#x2212;)&#x2264;63.895&#xd7;tan(0.5&#xb0;)&#xd7;500/+6.0525&#x2003;&#x2003;(1)2=1&#x2003;&#x2003;(2)wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.

Chip-mounted board, display device, and method for producing chip-mounted board

A lighting device () includes: a surface light source (); a first lens (L) having a first focal point (F), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L) having a second focal point (F), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I) is formed by the first lens and a second virtual image (I) is formed by the second lens, wherein the first virtual image (I) is formed between the second focal point (F) and the first lens, and the second focal point (F) is on a side opposite to the light source side relative to a predetermined focal position f'.

Illumination device

To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet () of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (), a &#xbc; wavelength plate (), and a polarized-light separating element (), the plurality of first prisms () each having (i) a first surface () through which light enters the first prism and (ii) a second surface () that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism () that reflects light.

Optical film

A lighting device () includes: a surface light source (); a first lens (L) having a first focal point (F), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L) having a second focal point (F), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I) is formed by the first lens and a second virtual image (I) is formed by the second lens, wherein the first virtual image (I) is formed between the second focal point (F) and the first lens, the second focal point (F) is on a side opposite to the light source side relative to a predetermined focal position f', and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B-B) whose curvatures vary discontinuously are provided in the non-revolution surface.

A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.

Micro corner cube array, method of making the micro corner cube array and reflective type display device

An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source. Consequently, it has become possible to erase an afterimage quickly on an active matrix liquid crystal display panel with a memory maintaining function of a liquid crystal display device, thereby not only upgrading the display quality, but also preventing deterioration of the liquid crystal caused by an application of an abnormal voltage associated with the occurrence of an afterimage.

Erasing device for liquid crystal display image and liquid crystal display device including the same

The reflection-type liquid crystal display device includes two liquid crystal layers for selectively reflecting light in a specific wavelength range, and a partition wall interposed between the liquid crystal layers so as to separate the liquid crystal layers from each other. The partition wall serves as a scattering layer having a light scattering function.

Reflection-type liquid crystal display device having partition wall between liquid crystal layers and light scattering layer

A display device includes a reflector in which a plurality of elements, each including a number of reflective regions, is arranged. In the reflector, the reflective regions of each said element are disposed so that at least part of incoming light, which has been incident on the element, is reflected by each one of the reflective regions after another and then allowed to go out of the element. At least one of the reflective regions of each said element includes: a light reflective plane; and a light modulating layer that is formed on one side of the light reflective plane so as to face the incoming light.

Display device

A reflector includes a substrate, a plurality of convex/concave portions formed on the substrate, and a thin reflective film formed over the convex/concave portions. When light is incident upon the reflector from a certain direction, an intensity of reflected light in a viewing angle range of about &minus;45&deg; to &plus;45&deg; with respect to a regular reflection direction of the incident light 10 is about 60% or more of an intensity of light which is incident upon a standard white plate from a direction inclined by about 30&deg; from a direction normal to the plate and is reflected to the direction normal to the plate.

Reflector, method for fabricating the same and reflective liquid crystal display device incorporating the same

A liquid crystal display device, includes: a first substrate, a second substrate, a liquid crystal layer interposed therebetween, and a plurality of pixel regions defined by a pair of electrodes for applying a voltage to the liquid crystal layer. Each of the plurality of pixel regions includes a reflection region and a transmission region, and the liquid crystal layer is made of a liquid crystal material having positive dielectric anisotropy. A first polarizing element is provided on the first substrate opposite to the liquid crystal layer; a second polarizing element is provided on the second substrate opposite to the liquid crystal layer; a first phase difference compensator is provided between the first polarizing element and the liquid crystal layer; and a second phase difference compensator is provided between the second polarizing element and the liquid crystal layer. A twist angle &thgr; of the liquid crystal layer is in a range of 0&deg; to 90&deg;. Retardation Rd and the twist angle &thgr; in a visible light region of the liquid crystal layer in the reflection region are in ranges within curves respectively represented by the following Formulae (1) and (2), and Formulae (3) and (4), in ranges within curves respectively represented by the following Formulae (5) and (6) and Formulae (7) and (8) at the twist angle &thgr; in a range of 0&deg;&lE;&thgr; &lE;54.3&deg;, and in ranges within curves respectively represented by prescribed Formulae.

Liquid crystal display device

Erasing device for liquid crystal display image and liquid crystal

A liquid crystal display device having a liquid crystal cell including: a pair of substrates at least one of which has light transparency; a chiral nematic liquid crystal layer having positive anisotropy of dielectric constant, disposed between the pair of substrates; and a voltage applying circuit for applying a voltage to the liquid crystal layer, wherein the liquid crystal layer contains a pleochroic dye, and liquid crystal molecules in the liquid crystal layer are twisted with respect to a helical axis perpendicular to surfaces of the pair of substrates, a twist angle of the liquid crystal molecules from one of the pair of substrates to the other of the pair of substrates is in a range selected from the group consisting of a range from 0.degree. to 50.degree., a range from 140.degree. to 250.degree., and a range of twist angles obtained by adding an integral multiple of n radian to the twist angles in the range from 0.degree. to 50.degree. and in the range from 140.degree. to 250.degree..

GH LCD having particular parameters and characteristics

A reflector includes a substrate, a plurality of convex/concave portions formed on the substrate, and a thin reflective film formed over the convex/concave portions. When light is incident upon the reflector from a certain direction, an intensity of reflected light in a viewing angle range of about -45.degree. to +45.degree. with respect to a regular reflection direction of the incident light is about 60% or more of an intensity of light which is incident upon a standard white plate from a direction inclined by about 30.degree. from a direction normal to the plate and is reflected to the direction normal to the plate.

Reflector, method for fabricating the same and reflective liquid crystal

Growing community of inventors

Tenri, Japan

Yasuhisa Itoh