Abstract:
To provide a display device in which the brightness of the image viewed by the observer is bright, and the brightness of the image is as uniform as possible. The display device according to the present invention includes a frame 10 and an image display device 100, the image display device 100 includes an image forming apparatus 11 and an optical device 120, the optical device 120 includes a light guide plate 121, a first deflection unit 130 configured with a first hologram diffraction grating 131 and a second hologram diffraction grating 135, and a second deflection unit 140 configured with a third hologram diffraction grating 141, and slant angles and pitches of the first hologram diffraction grating 131, the second hologram diffraction grating 135, and the third hologram diffraction grating 141 satisfy a predetermined relation.
Abstract:
PROBLEM TO BE SOLVED: To prolong the life of a light source, to realize excellent color reproduction, to improve the utilization efficiency of light, to reduce power consumption and to miniaturize the device. SOLUTION: Illuminating light beams of red, green and blue emitted from light emitting diodes 12R, 12G and 12B respectively pass through a relay lens and a field lens, irradiate video display light valves 11R, 11G and 11B, are spatially intensity-modulated, synthesized by a synthesizing prism 10 and enlarged and projected to a screen 17 by a projection lens 15. The shape of the light emitting parts of the light emitting diodes 12R, 12G and 12B is made the same as or similar to the shape of a video display area on the light valves 11R, 11G and 11B so that the shape of luminous flux irradiating the video display area on the valves may be the shape corresponding to the shape of the video display area on the screen.
Abstract:
PROBLEM TO BE SOLVED: To adjust a color shade of an image taken with emission of auxiliary light to a natural color shade.SOLUTION: An environmental light white balance gain generating section generates environmental light white balance gain from an image taken under environmental light. A composite white balance gain generating section combines auxiliary light white balance gain corresponding to a color temperature of auxiliary light with the environmental light white balance gain to generate composite white balance gain. A white balance gain correcting section corrects the composite white balance gain in accordance with a ratio of the environmental light to the auxiliary light.
Abstract:
PROBLEM TO BE SOLVED: To optimize a polarization split characteristic even in a state where an element temperature becomes high relative to room temperature such as temperature inside a projector by using a material having the temperature dependency of comparatively high refractive index as a component like a liquid crystal material. SOLUTION: In a diffracted optical element composed of a structure in which a first region and second region 6 and 7 each having different temperature dependency in the refractive index with each other are arranged alternatively, the element temperature at which diffraction efficiency for incident light in a specific polarization direction becomes minimal is set within the limits of 25 to 70 degrees C. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To enhance the diffraction efficiency and to enlarge the polarization separation degree by specifying and optimizing the selection of a liquid crystal, the combination of each kind of monomers, the combination of a photopolymerization starting material and a coloring matter, and the compounding ratio of each kind of material, for a structure in which the anisotropic region and an isotropic region are alternately stacked by making use of a liquid crystal and a polymer material. SOLUTION: A mixture of a photopolymerizable multifunctional group monomer, a photopolymerizable bifunctional group monomer, a photopolymerizable monofunctional group monomer and a liquid crystal are placed between a pair of optical substrates 1 and 2, and this layer is subjected to holographic exposure to form it. The photopolymerized bifunctional group monomer is hydroxy pivalic acid neopently glycol diacrylate, or its adduct compound. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To simply capture a panned image with reality.SOLUTION: An imaging apparatus comprises: a first imaging device which captures an image corresponding to condensed light; a second imaging device which captures an image corresponding to condensed light; and a synthesizing unit which compares a first image captured by the first imaging device with a second image captured by the second imaging device and synthesizes at least a portion of the first image and at least a portion of the second image. The first exposure period of the first image is longer than that of the second image, and the first exposure period and the second exposure period overlap at least partially, with respect to a time axis.
Abstract:
PROBLEM TO BE SOLVED: To improve light utilization efficiency, and to reduce the power consumption and the size of an apparatus. SOLUTION: Red, green and blue illuminating light beams, emitted from light-emitting diodes 12 R, 12G and 12R, are radiated to picture display light bulbs 11R, 11G and 11B through relay lenses and field lenses and are spatially modulated in intensity and are composited by a composite prism 10 and are enlarged and projected on a screen 17 by a projection lens 15. Profiles of light-emitting portions of the light-emitting diodes 12R, 12G and 12B are made identical or similar to profiles of the picture display areas in picture display light bulbs 11R, 11G and 11B so that the profiles of light beams radiated to the picture display areas will correspond to profiles of the picture display regions. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an imaging apparatus, an imaging control method, and a program capable of minimizing the difference of brightness of an image acquired from two image pickup devices when the incident light from a subject is polarized.SOLUTION: In an imaging apparatus, an imaging control method, and a program: a half mirror 22 divides an incident light from a subject into two optical paths; a first image pickup device 24 receives one of the incident lights divided by the half mirror 22; a second image pickup device 25 receives the other one of the incident lights divided by the half mirror 22; a first subject luminance calculation part 26 calculates a first subject luminance information based on the output of the first image pickup device 24; a second subject luminance calculation part 29 calculates a second subject luminance information based on the output of the second image pickup device 25; and an exposure correction value calculation part 32 compares the first subject luminance information and the second subject luminance information. For instance, the disclosed technique can be applied to an imaging device.
Abstract:
PROBLEM TO BE SOLVED: To produce a hologram recording film, in which a diffraction grating layer having interference fringes different in slant angle is multilayered, by a simple method. SOLUTION: The hologram recording film manufacturing method includes: a step (A) of obtaining a laminated structure 13 by alternately laminating M (where M≥2) photosensitive material precursor layers 11A, 11B and at least one (M-1) resin layer 12A on one another; a step (B) of obtaining M photosensitive material layers 21A, 22A, 21B, where at least two interference fringes with a desired pitch and a desired slant angle are formed on each of the M photosensitive material layers, from the M photosensitive material precursor layers by irradiating the laminated structure 13 with a reference laser light beam and an object laser light beam; and a step (C) of making the slant angles of the M photosensitive material layers 21A, 21B different from each other while retaining the pitch value, which is defined on a face of the photosensitive material layer, by irradiating the laminated structure 23 with an energy ray from the one face side of the laminated structure 23, and heating the laminated structure. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a hologram optical device having a structure formed by alternately piling up an anisotropic region and an isotropic region using a liquid crystal and a high molecular material, wherein the selection of the liquid crystal, the combination of various monomers, the combination of a photo-polymerization initiator and a dyestuff or the blending ratio of the various material are specified and optimized to improve diffraction efficiency, to increase the polarization separation degree, to mitigate contraction stress associated with the photo-polymerization of the material and to prevent the degradation of the material due to heat and light. SOLUTION: The polarization selecting hologram optical device is formed by forming a layer from a mixture comprising at least one kind of a photo-polymerizable monomer having one or more functional groups and the liquid crystal to have a prescribed thickness between a pair of optical substrates 1, 2 and holographic-exposing the layer. Further the stress mitigation layer 10 is provided on the optical substrate. COPYRIGHT: (C)2008,JPO&INPIT