Sony Corporation

Texas Instruments Corporation

Junichi Iwai

Shigeo Kubota

Naoya Katoh

Hiroshi Yamashita

Yoshiki Shirochi

Hideo Morita

Koichiro Kakinuma

Shuichi Haga

Takehiro Nakatsue

Ko Ishimoto

Tatsuhiko Matsumoto

Yoshihiro Kosugi

Hiroshi Takizuka

Koichi Oura

Kazuji Uemura

Hideki Yamamoto

Hiroshi Nakayama

Yasuaki Nakane

Shuichi Igarashi

Jun Nishikawa

Yuji Manabe

Hideo Tomita

Sakuya Tamada

Senri Miyaoka

Satoru Mizouchi

Signals are provided which allow colors in a wider color range than predetermined standards, which can be handled by apparatus according to such predetermined standards. A primary color converter converts first color signals having primary color points in a wider color range than the primary color points according to BT.709 into second color signals based on the primary colors according to BT.709. A photoelectric transducer converts the second color signals into third color signals according to photoelectric transducer characteristics defined in a numerical range wider than a range from 0 to 1.0 of color signals corresponding to a luminance signal and color difference signals according to BT.709. A color signal converter converts the third color signals into a luminance signal and color difference signals. A corrector incorporated in the color signal converter corrects the color difference signals into color difference signals.

Signal processing apparatus and method, and program

A projection image display apparatus includes: a light source; an illumination optical system that uniformly irradiates a surface of an image modulation element serving as a primary image surface with a light beam emitted from the light source; and a projection optical system that enlarges and projects image information on the primary image surface modulated by the image modulation element onto a screen serving as a secondary image surface, and that includes a first optical system that forms an intermediate image from the image information, a single-image second optical system that enlarges and projects the intermediate image to display a single image on the screen, a plural-image second optical system that enlarges and projects the intermediate image to display plural images on the screen, and an optical path switching mechanism that selectively guides a light beam from the first optical system to the single-image or plural-image second optical system.

Projection image display apparatus and projection optical system

A projection display apparatus includes a light source configured to emit light, at least one reflective liquid crystal device configured to generate an image by modulating a polarization of the light emitted from the light source and reflecting the light, an imaging lens configured to form a real image of the image generated by the reflective liquid crystal device, a quarter-wave plate disposed between the reflective liquid crystal device and the imaging lens, an image splitter configured to include at least one reflecting plane and spatially split the real image into at least two split real images by reflecting the real image on the reflecting plane, at least two projection lenses configured to form the split real images again on a screen, and a phase difference corrector configured to correct a phase difference between a p-polarized light and an s-polarized light generated by the reflecting plane.

Projection display apparatus

A liquid crystal projector which projects a three-dimensional imaged based on image signals for the left and right eyes including: a liquid crystal panel into which an image for the left or right eye is written in a one-field time period based on the image signal; an optical shutter has a plurality of divisional regions arranged in a vertical direction and controllable independently in regard to whether or not light should be blocked; a polarizing element has a plurality of divisional regions arranged in vertical direction and controllable independently in regard to whether the polarization direction should be set to that for the left eye or the right eye; and a control circuit controls the optical shutter and the polarizing element in synchronism with a writing position in the liquid crystal panel.

Liquid crystal projector and control method for liquid crystal projector

Disclosed herein is a projection type display apparatus, including: a color separation optical system configured to separate light from a light source into a plurality of light fluxes of different colors; a plurality of reflection type light valve devices provided individually for the color light fluxes; a plurality of polarization beam splitters each configured to polarize and separate a predetermined one of the color light fluxes separated by said color separation optical system and then polarize and separate the light coming in from the reflection type light valve device; and a light reception device provided for one or more of said polarization beam splitters and configured to detect light emitted from a second face from among faces of the predetermined polarization beam splitter which is opposite to a first face to which the predetermined color light flux from said color separation optical system is introduced.

Projection type display apparatus which detects light emitted from a face of a beam splitter and method thereof

Signals are provided which allow colors in a wider color range than predetermined standards, which can be handled by apparatus according to such predetermined standards. A primary color converter converts first color signals having primary color points in a wider color range than the primary color points according to BT.709 into second color signals based on the primary colors according to BT.709. A photoelectric transducer converts the second color signals into third color signals according to photoelectric transducer characteristics defined in a numerical range wider than a range from 0 to 1.0 of color signals corresponding to a luminance signal and color difference signals according to BT. 709. A color signal converter converts the third color signals into a luminance signal and color difference signals. A corrector incorporated in the color signal converter corrects the color difference signals into color difference signals.

Provided are a projector capable of correcting a polarization state properly and improving image quality, a retardation plate being used in a projector or the like and being capable of correcting a polarization state properly, and a method of placing a retardation plate. A quarter-wave plate () is placed between a reflective spatial light modulator () and a PBS (). The quarter-wave plate () includes a combination of a first retardation plate () and a second retardation plate () each producing a different phase difference. The phase differences produced by two retardation plates (), () are set to be suitable amounts of phase difference according to a position state, so in spite of the fact that the quarter-wave plate () including the combination of two retardation plates, the quarter-wave plate () can correct the polarization state properly with performance equal to or higher than that in the case where the quarter-wave plate includes a single plate.

Projector and phase difference plate and method of arranging phase difference plate

A small-sized and light-weight projector apparatus capable of projecting images of high picture quality. A color separation/synthesis section of a projector apparatus includes a glass block body composed of a plurality of glass blocks combined together in such a manner that the corresponding sides are in close contact with each other; and a plurality of dielectric multilayer films for separating corresponding component rays of white light included in incident light and for synthesizing emitted rays from a plurality of corresponding spatial modulators. Shapes of individual glass blocks are respectively chosen in so that unnecessary rays generated by the reflection or transmission of reflected rays from respective spatial modulators at the corresponding dielectric multilayer films to be transmitted through or reflected from do not travel toward the reflective surface of any of spatial modulators and moreover after the reflection or transmission at the corresponding dielectric multilayer film, the unnecessary rays first enter the surface of the glass block with an incidence less than 30.

Projector apparatus

An image display apparatus having light beam sources for generating light beams, an optical modulator for modulating the light beams by image signals to be projected, a deflection device for deflecting the modulated light beams, the deflection device including a polygon mirror and an auxiliary reflection mirror provided near the polygon mirror such that the modulated light beams are reflected from the polygon mirror to said auxiliary reflection means and back toward the polygon mirror, a device for supplying the modulated light beams to the polygon mirror with predetermined angles relative to a rotational plane of the polygon mirror, such that the modulated light beams incident upon the polygon miror are reflected a plurality of times by the polygon mirror, and a projection device for projecting the modulated and deflected light beams from the deflection device on a screen or the like.

Image display apparatus with increased raster scan rate of laser beams

A laser beam deflection apparatus is comprised of a polygon mirror having a plurality of reflection surfaces, a laser beam incident on the reflection surfaces of the polygon mirror, and n number of reflection devices positioned in facing relation to the polygon mirror, and aligned in a rotational direction of the polygon mirror for reflecting the laser beam reflected from one of the reflection surfaces back towards the one of the reflection surfaces of the polygon mirror, whereby the laser beam is twice reflected by the one of the reflection surfaces and is deflected through a predetermined angle n times during each predetermined increment of rotation of the plurality of reflection surfaces of the polygon mirror.

Growing community of inventors

Kanagawa, Japan

Junichi Iwai