Nec Viewtechnology, Ltd.

Synztec Co., Ltd.

Nec Display Solutions, Ltd.

Hitachi, Ltd.

Jun Ogawa

Atsushi Ikeda

Wataru Nemoto

Asuka Koyanagi

Kazuya Takato

Naofumi Ishikura

Keisuke Yamamoto

Atsushi Katou

Kunitaka Furuichi

Kohei Terasaki

A schedule creation assisting deviceincludes: a storage unit that stores information on a total working time length in a specified period of each of workers who work in cooperation in a specified operation, a number of the workers necessary at each timing during the period, and a constraint condition regarding allocation of the workers to the operation; and a computation unitthat computes an Ising model in which, regarding an objective function including, as terms, the total working time length in the period, the number of necessary workers, and a constraint condition function that is minimized when the constraint condition is satisfied, whether each of the workers is to attend at work is set as a spin, and a sensitivity between variables of the constraint condition function is set as an intensity of interaction between the spins, and that outputs a schedule in which whether each of the workers is to attend at work at the each timing during the specified period is specified based on the result.

Schedule creation assisting device and schedule creation assisting method

In the elastomer porous material of the invention, when cells in a first observation region of a first cross section are observed at a certain magnification, cells having an aspect ratio a/b, wherein a represents the maximum diameter of each cell and b represents the length of the minor axis of that cell as measured in a direction orthogonal thereto, of 1.3 or less account for 70% or more of all cells in the first observation region, and, when cells in a second observation region of a second cross section orthogonal to the first cross section are observed at a certain magnification, cells having an aspect ratio a/b, wherein a represents the maximum diameter of each cell and b represents the length of the minor axis of that cell as measured in a direction orthogonal thereto, of 1.3 or less account for 70% or more of all cells in the second observation region.

Elastomer porous material and method of producing the same

In the elastomer porous material of the invention, when cells in a first observation region of a first cross section are observed at a certain magnification, cells having a shape factor SF1, which indicates the roundness of a circle and is represented by the following formula: (wherein a represents the length of major axis of each cell, and A represents the area thereof), of 150 or less account for 80% or more of all cells in the first observation region, and, when cells in a second observation region of a second cross section orthogonal to the first cross section are observed at a certain magnification, cells having a shape factor SF1, which indicates the roundness of a circle and is represented by the same formula (wherein a represents the length of major axis of each cell, and A represents the area thereof), of 150 or less account for 80% or more of all cells in the second observation region.

In the elastomer porous material of the invention, when cells in a first observation region of a first cross section are observed at a certain magnification, cells having a shape factor SF, which indicates the remoteness from complete roundness and is represented by the following formula: (wherein A represents the area of each cell, and P represents the perimeter length thereof), of 130 or less account for 80% or more of all cells in the first observation region, and, when cells in a second observation region of a second cross section orthogonal to the first cross section are observed at a certain magnification, cells having a shape factor SF, which indicates the remoteness from complete roundness and is represented by the same formula (wherein A represents the area of each cell, and P represents the perimeter length thereof), of 130 or less account for 80% or more of all cells in the second observation region.

The invention provides an illumination optical system that guides light emitted from light source deviceto DMD, the illumination optical system including: light tunnelthat uniformizes luminance distribution of light emitted from light source device; relay optical systemthat guides light having uniformized illumination distribution to DMD; and shield boarddisposed on an optical path between light tunneland relay optical system. Shield boardis smaller than outlet end faceof light tunneland at the same time has an opening of a shape similar to the image formation area on DMD, and is movable in a plane containing the opening.

Illumination optical system and projection type display apparatus with a shield board

In a projection display device that is provided with a relay lens for converting flux that is emitted from a light source to a parallel flux for illuminating an image display element (DMD), and a total internal reflection prism for both directing flux that is emitted from the relay lens to the DMD and directing flux that is reflected by the DMD toward a projection lens, the relay lens is unified with the prism as a lens-integral prism by bonding the relay lens to the total internal reflection surface of the prism.

Projection display device

A light flux modulated by a picture is shot out from a liquid crystal projector, and projected on the rear surface of the transparent screen, and a user enjoys the picture from the front side thereof. The sawlike prismatic surface is formed on the rear surface of the transparent screen. Edges of the sawlike prismatic surface form concentric circles centering around a point which is given as an intersection of an optical axis of the projector and a downward extensions of the transparent screen. A face looking downward transmits the light flux incident thereon into the transparent screen efficiently on condition that an angle formed by the incident ray of light and the optical axis of the projector is greater than 40&deg; and less than 90&deg;. A face looking upward totally reflects the ray of light incident thereon to the light-shooting surface, if the aforementioned condition is satisfied.

Picture display of rear surface projection type

A DMD projector of small size, lightweight and long life, which employs LED arrays as a light source for brighter screen. According to the projector, projection light from sets of a LED array, a first fly-eye lens appressed thereto, and a second fly-eye lens disposed at a distance therefrom, which are prepared for red, green and blue, enters into three entrance planes of a XDP, and a synthesized light of red, green and blue is projected from the exit plane of the XDP to illuminate a DMD panel. At this point, rays reflected from on-pixels of the DMD panel makes images on a screen via a projection lens using an optical system in which extended images of the same number as the elements of the LED arrays, the images being obtained through exit pupils of respective element lenses of the first fly-eye lenses, the corresponding element lenses of the second fly-eye lenses, and the subsequent illumination lenses, are focused and superposed on the DMD panel. In addition, the projector projects images in color by synchronizing on/off signals of red, green and blue with on/off signals of the pixels on the DMD panel.

LED-illumination-type DMD projector and optical system thereof

A reflection type image forming optical system and a projector are compact with wide view angle, in expensive and having uniform illumination intensity. The reflection type image forming optical system includes a first reflection mirror having a rotation symmetric aspheric shape concave reflection surface directed to an image forming surface arranged an image forming element thereon, a second reflection mirror having a rotation symmetric aspheric shape convex reflection surface directed toward a flux of light from the first reflection mirror, a third reflection mirror having a rotation symmetric aspheric shape concave reflection surface directed toward a flux of light from the second reflection mirror and a fourth reflection mirror having a rotation symmetric aspheric shape convex reflection surface directed toward a flux of light from the third reflection mirror. The first, second, third and fourth reflection mirrors form a telecentric optical system.

Reflection type image forming optical system and projector

All of optical elements constituting a projecting optical system are reflection mirrors to The reflection mirrors to are arranged in a plate-shaped support member with a relative positional relation between the reflection mirrors being fixed. A position of the whole projecting optical system with respect to an image-forming component is adjust by moving the support member

Projector

A lens-less projection optical system of the reflection type is provided with four reflecting mirrors, which successively reflect a light flux transmitted through a picture-forming device. The light flux reflected by the fourth reflecting mirrors is projected on the screen. The second reflecting mirror is so situated that its reflecting surface shaped into a convexly curved surface is directed to the light flux reflected from the first reflecting mirror. The third reflecting mirror is so situated that its reflecting surface shaped into a convexly curved surface is directed to the light flux reflected form the second reflecting mirror. The fourth reflecting mirror is so situated that its reflecting surface shaped into a convexly curved surface is directed to the light flux reflected from the third reflecting mirror.

Growing community of inventors

Tokyo, Japan

Jun Ogawa