Sony Corporation

Fuji Xerox Co., Ltd.

Hideki Yamamoto

Tetsuyuki Miyawaki

Masao Katsumata

Junichi Iwai

Jun Nishikawa

Yuji Manabe

Takaaki Yoshida

Taisuke Endo

Hideo Tomita

Yoshihisa Aikoh

Shigeru Tsukada

Keisuke Homma

Masahiro Inoue

Hiroyasu Tagami

Keigo Yamada

Yusuke Kabe

Hiroshi Tsuyuki

Tetsuaki Iwane

Satoko Imai

Yasuhiro Minamidate

Kyoichi Imon

Toshihiro Osawa

A pallet includes at least one top board on which a load is to be placed and at least one substantially plate-shaped stringer board that is provided independently of the top board and that has at least one non-contact portion, which is not in contact with the top board in a region between the stringer board and the top board, the stringer board being in contact with the top board in a vertical direction.

Pallet

An optical device includes: a light synthesis prism that synthesizes incident light beams which are incident to a plurality of incidence surfaces and outputs the synthesized light beams; a light modulation unit that includes an optical compensation element and a reflective light modulation device; and a fixing member that fixes a reflective polarization element and the light modulation unit to the light synthesis prism so as to correspond to one of the incidence surfaces, wherein the light modulation unit includes a light blocking member that blocks light from reaching the light modulation unit and limits light with which the optical compensation element and the reflective light modulation device are irradiated, to light passing an aperture portion; and a heat insulating member that comes into contact with the light blocking member and the fixing member.

Optical device and projection device using the optical device which reduce registration shift caused by heat

A packaging box includes a box body having a bottom board, side boards, and bending flaps; and a cushioning material having a bottom surface section and side surface sections. A restrainer is formed at least one of the bending flaps, the restrainer having a portion that is separated from and opposes the bottom board when the portion of the restrainer is bent into an accommodation space of the box body. A restrain portion is formed at the side surface section of the cushioning material opposing the restrainer formed at the at least one of the bending flaps, the restrain portion having a portion that is positioned at a side of the bottom board so as to abut upon the portion of the restrainer and that opposes the portion of the restrainer when the cushioning material is fitted in the accommodation space of the box body.

Packaging box

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 horizontal register transfer pulse generator includes: phase adjuster generating an output signal, from reference signal; and horizontal blanking period generator based on output signal, reference signal, and horizontal blanking pulse, wherein horizontal blanking period generator includes: delay masking pulse generator generating delay masking pulse delayed by predetermined phase relative to masking pulse generated on horizontal blanking pulse inputted into horizontal blanking period generator; and determination means determining phase difference between output signal and reference signal, when phase difference between output signal and reference signal is less than predetermined phase, horizontal blanking period generator combines masking pulse with output signal to generate horizontal register transfer pulse with horizontal blanking period, and when phase difference between output signal and reference signal is equal to or greater than predetermined phase, horizontal blanking period generator combines delay masking pulse with output signal to generate horizontal register transfer pulse with horizontal blanking period.

Horizontal register transfer pulse generation circuit and imaging apparatus

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

An apparatus for transmitting or reflecting incident light. The apparatus includes a pair of diffraction grid substrates; a substantially grid-shaped diffraction grid formed of metal, wherein the diffraction grid is disposed between the substrates; and a pair of adhesive layers, each adhesive layer coupled to each substrate. The apparatus also includes a pair of block members, wherein each block member is coupled to each adhesive layer. The block member is configured with a plurality of substantially equally-shaped flat plate members alternately layered with adhesive layers for optically coupling the block member with substantially reduced optical distortion than when configured with a single transparent component. The block member includes a surface to output the light transmitted or reflected from the diffraction grid and passing through the flat plate members.

Prism, projection and optical component

Provided are an illumination optical system having superior color rendering properties while ensuring sufficient illuminance, an image display apparatus comprising the illumination optical system and a spatial modulation device illuminated by the illumination optical system, and a method of illuminating the spatial modulation device. A first light source (), a second light source () having a different emission spectrum from an emission spectrum of the first light source (), and a replacement optical system replacing light in a specific waveband in a luminous flux (L) from the first light source () with a luminous flux (L) from the second light source () are comprised, and the light in the specific waveband with weak light intensity in the luminous flux (L) from the first light source () is replaced with the luminous flux (L) with sufficient intensity from the second light source (). Thereby, a white balance can be kept without reducing the illuminance more than necessary, and superior color rendering properties can be exhibited.

Illuminating optical system, image display unit and method of illuminating space modulation element

A prism optimally separating and synthesizing a light beam of a wide angle of incidence. A diffraction prism of the present invention is so constructed that a diffraction grid is sandwiched between a pair of diffraction grid substrates , a pair of prism substrates are bonded to the surfaces of the prism substrates facing the diffraction grid with interposition of adhesive layers , and a diffraction grid medium having a refractive index substantially equal to that of the prism substrates is charged in a gap defined by the diffraction grid and the prism substrates , with the respective component members being optically combined together. An incident light is led to the diffraction grid and separated on transmission or reflection by the operation of diffraction by the diffraction grid

Prism, projection device and optical component

A projection-type display device which is used in a projector device for projecting optical images spatially modulated by reflection-type liquid crystal panels onto a screen to display an image, wherein a wavelength separation mirror is arranged so that an angle exhibited by an optical axis of light incident on the wavelength separation mirror and the optical axis of reflected light becomes smaller than 90 degrees or polarization filters or polarization separation elements are arranged on an incident facet side or an emission facet side of optical separation elements.

Projection-type display device

A projection apparatus is disclosed which uses a light modulation element of the reflection type and can demultiplex and multiplex light appropriately. The projection apparatus includes four PBSs including an incoming PBS, a RB-PBS, a G-PBS and an outgoing PBS to demultiplex illumination light emitted from a lamp into light components in wavelength bands of blue, red and green. The illumination light in the wavelength band of green is introduced to a position at which the highest contrast is obtained, and a third liquid crystal panel is disposed at the position. The illumination light in the wavelength band of red is introduced to another position at which the second highest contrast is obtained, and a second liquid crystal panel is disposed at the position. The illumination light in the wavelength band of blue is introduced to the remaining position, and a first liquid crystal panel is disposed at the position. Reflected light components in the wavelength bands modulated by the individual liquid crystal panels are multiplexed and then projected in an enlarged scale through a projection lens.

Projection apparatus

A projection-type display device for displaying an image using a projector device emitting optical images spatially modulated by reflection-type liquid crystal panels onto a screen, wherein phase difference plates are arranged at the incidence planes of the reflection-type liquid panels so as to cancel out the retardation comprised of the retardation corresponding to one-quarter of the wavelength of the incident light due to the polarization beam splitter plus the retardations due to the dichroic mirrors of the color separating and synthesizing means, whereby it is possible to make the illumination light leaking from the polarization beam splitter to the projection lens at the black level portions extremely small and possible to prevent a reduction in the contrast due to the haze phenomenon.

Growing community of inventors

Kanagawa, Japan

Hideki Yamamoto