Abstract: A projection display includes three illumination units to emit red, green, and blue beams, at least one optical modulator to modulate the red, green, and blue beams to be suitable for image data, and projection optics to magnify and project the light beams emitted from the at least one optical modulator. Each of the illumination units includes: a collimator including a parabolic first reflective surface; a compact light source located at a focal point of the first reflective surface; a polarizer that transforms a light beam emitted from the collimator into a P- or S-polarized beam; and an integrator that transforms the light beam emitted from the polarizer to be emitted at a uniform intensity of light.

Abstract: The present invention is directed to provide, for example, a lighting device and an image display, with which higher luminance and others can be achieved.

Abstract: The invention provides an image display apparatus (1) comprising a lighting system (100); a LCD element (304); and an actuating means for varying the transmittance of the LCD element (304) according to image signals, wherein the LCD element (304) is designed such that when the angle of view with respect to a specified direction of a screen varies provided that the entire LCD element (304) is in a white display mode, transmittance varies such that it has peak values at viewing angles other than viewing angles in the vicinity of 0 degree, and wherein the lighting system (100) is designed such that the intensities of light beams emitted in the directions of the viewing angles in the vicinity of 0 degree are higher than the intensities of light beams emitted in the directions of the viewing angles at which the transmittance has a peak value.

Abstract: A projection optical system and an image projection apparatus that are small in size and can achieve projection with a wide angle while a good image forming performance is assured includes a first lens group having a negative refracting power and a second lens group also having a negative refracting power. The first and second lens groups are arranged in order from the projection side. The first lens group includes a negative meniscus lens that has a concave surface directed to the projection side and formed as an aspherical reflecting surface.

Abstract: Provided is a projection display including an illumination module. The illumination module includes a light source including a plurality of light emitting devices, a light guide panel having a top surface from which light is emitted, the top surface facing the optical modulator, and an edge surface on which light is incident, and an optical transport member for guiding light emitted from the light source to the edge surface of the light guide panel, the section of the optical transport member parallel to the edge surface increasing in size from the edge surface to the light source.

Abstract: A compact light source module includes a compact light source and a collimator that includes a parabolic first reflective surface to reduce a radiation angle at which a light beam radiates from the compact light source, so as to emit the light beam through a side aperture and a plane second reflective surface which is located under the first reflective surface and comprises an incident portion through which the light beam radiates from the compact light source. The compact light source is located in the vicinity of a focal point of the first reflective surface.

Abstract: A projection display includes three integrator modules which emit red, green, and blue beams, respectively. The integrator modules include at least one compact light source and a glass rod that transforms a light beam emitted from the at least one compact light source so as to have a uniform light intensity and emits a modulated light beam. The glass rod includes an incident portion through which the light beam radiates, and an emission portion through which the light beam is emitted. The incident portion includes a parabolic first reflective surface to collimate the light beam radiating from the at least one compact light source, and the at least one compact light source is located in the vicinity of a focal point of the first reflective surface.

Abstract: A projection optical system and an image projection apparatus that are small in size and can achieve projection with a wide angle while a good image forming performance is assured includes a first lens group having a negative refracting power and a second lens group also having a negative refracting power. The first and second lens groups are arranged in order from the projection side. The first lens group includes a negative meniscus lens that has a concave surface directed to the projection side and formed as an aspherical reflecting surface.

Abstract: A projection display includes three illumination units to emit red, green, and blue beams, at least one optical modulator to modulate the red, green, and blue beams to be suitable for image data, and projection optics to magnify and project the light beams emitted from the at least one optical modulator. Each of the illumination units includes: a collimator including a parabolic first reflective surface; a compact light source located at a focal point of the first reflective surface; a polarizer that transforms a light beam emitted from the collimator into a P- or S-polarized beam; and an integrator that transforms the light beam emitted from the polarizer to be emitted at a uniform intensity of light.

Abstract: A projection display includes three integrator modules which emit red, green, and blue beams, respectively. The integrator modules include at least one compact light source and a glass rod that transforms a light beam emitted from the at least one compact light source so as to have a uniform light intensity and emits a modulated light beam. The glass rod includes an incident portion through which the light beam radiates, and an emission portion through which the light beam is emitted. The incident portion includes a parabolic first reflective surface to collimate the light beam radiating from the at least one compact light source, and the at least one compact light source is located in the vicinity of a focal point of the first reflective surface.

Abstract: A compact light source module includes a compact light source and a collimator that includes a parabolic first reflective surface to reduce a radiation angle at which a light beam radiates from the compact light source, so as to emit the light beam through a side aperture and a plane second reflective surface which is located under the first reflective surface and comprises an incident portion through which the light beam radiates from the compact light source. The compact light source is located in the vicinity of a focal point of the first reflective surface.

Abstract: Provided is a projection display including an illumination module. The illumination module includes a light source including a plurality of light emitting devices, a light guide panel having a top surface from which light is emitted, the top surface facing the optical modulator, and an edge surface on which light is incident, and an optical transport member for guiding light emitted from the light source to the edge surface of the light guide panel, the section of the optical transport member parallel to the edge surface increasing in size from the edge surface to the light source.

Abstract: A projection display includes an illumination module, an optical modulator for modulating light incident from the illumination module in response to image data, and a projection optical system for projecting light emitted from the optical modulator on an enlarged scale. The illumination module includes at least one light source, and a light recycling unit which causes light emitted from the light source having an emission angle beyond a predetermined range in which light can be effectively projected by the projection optical system to travel within the predetermined range.

Abstract: In a display device according to a first aspect of the invention, luminance is not made substantially uniform over the entire display screen but rather imparted a luminance gradient such that luminance substantially monotonously decreases from the center of the screen towards the peripheral portion using a luminance gradient forming means, whereby power consumption is reduced compared to cases in which the entire screen shows substantially uniform luminance. In a second aspect of the invention, by optimizing gray level characteristics and thereby improving a viewer's impression of brightness, luminance gradient is made even less perceivable without increasing power consumption. These configurations provide large screen, low power consumption display devices.

Abstract: The present invention is directed to provide, for example, a lighting device and an image display, with which higher luminance and others can be achieved.

Abstract: The invention provides an image display apparatus (1) comprising a lighting system (100); a LCD element (304); and an actuating means for varying the transmittance of the LCD element (304) according to image signals, wherein the LCD element (304) is designed such that when the angle of view with respect to a specified direction of a screen varies provided that the entire LCD element (304) is in a white display mode, transmittance varies such that it has peak values at viewing angles other than viewing angles in the vicinity of 0 degree, and wherein the lighting system (100) is designed such that the intensities of light beams emitted in the directions of the viewing angles in the vicinity of 0 degree are higher than the intensities of light beams emitted in the directions of the viewing angles at which the transmittance has a peak valu

Abstract: The disclosed spatial light modulator includes a pair of facing transparent electrodes, and a light-modulating layer and a photoconductive layer provided between the transparent electrodes In the spatial light modulator, the light-modulating layer has different optical states depending on an applied charge amount. Specifically, the light-modulating layer has: a first optical state when the applied charge amount is a first threshold charge amount or more; a second optical state when the applied charge amount is a second threshold charge amount or less; and a spatially uniform intermediate state between the first optical state and the second optical state depending on the applied charge amount. Also, a driving method for such a spatial light modulator is disclosed.

Abstract: The present invention relates to a projection type image displaying apparatus capable of displaying larger picture images which are bright, uniform and after-image-free.

Abstract: In a projection type video display device comprising a light writing type spacial light modulator, disturbances brought about by a resetting pulse and appearing in a projected picture as a black belt or beat are prevented. This is accomplished by causing the resetting pulse, which is to withdraw electric charges produced by incoming writing light and accumulated in spacial light modulator, to occur within a vertical blanking period synchronized with vertical synchronization signal.Further, by changing the pulse width and the voltage of the resetting pulse in accordance with vertical synchronization frequency, pictures of a certain fixed brightness are made available against various vertical synchronization frequencies; and even with a high vertical synchronization frequency, projected pictures are never annoyed by such disturbance that is caused by a resetting pulse dislocated out of the vertical blanking period.

Abstract: A spatial light modulator (SLM) providing effects light blocking of even strong incident light without reducing the photoelectric conversion efficiency, and a projector using said SLM, are disclosed.