Abstract:
PROBLEM TO BE SOLVED: To improve the light receiving sensitivity of infrared rays in a solid-state imaging apparatus for achieving the simultaneous image pickup of visible rays and infrared rays. SOLUTION: The functional region of infrared ray detection pixels is formed to the deeper place of the functional region of visible ray detection pixels. In the functional region of pixels in the depth direction from the surface of an N type semiconductor substrate, modulation doping is carried out so that the density of N type dopant can be turned to be lower according as it becomes deeper from the surface side of the semiconductor substrate, and P type dopant is carried out so that the peak position of the density of the P type dopant can be turned to be deeper than the peak position of the density of the N type dopant. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To acquire a high quantity image even under low illumination, using an imaging apparatus. SOLUTION: An IR light cut filter layer 313 having openings 313a permeable to the visible light and the IR light and non-openings 313b permeable to the visible light but impermeable to the IR light, and a color filter group 314 for separating the visible light region into the components R, G, B, are disposed integrally on a solid state imaging element 312. A wavelength region pixel 12A detects a wide wavelength region component including the visible light and the IR light passed through the openings 313a to generate a brightness signal from its detected signal. Each of color pixels 12R, 12G, 12B detects each of the color components R, G, B passed through the non-openings 313b to generate a color difference signal from each color signal. If needed, it detects the color signal from the brightness signal based on the detected signal of the wavelength region pixel 12A to correct each color signal detected by each of the color pixels 12R, 12G, 12B, using its color signal. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a screen that will not cause the contrast of images to deteriorate and can present clean images in which black display portions have lowered luminance level, even when an unrelated external light is made incident on the image, and to provide an image display system that uses the screen. SOLUTION: The screen for projection is constituted, by successively stacking photonic crystals for red color reflection, photonic crystals for green color reflection and photonic crystals for blue color reflection on a substrate. The substrate used here can absorb lights of wavelengths, other than those of three primary colors of red, green and blue. The image display system is comprises the screen and light sources for projection, comprising semiconductor light-emitting elements which emit lights of wavelengths, corresponding to the three primary colors of red, green and blue. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To enable influence of unwanted wavelength-region components, such as infrared light, etc. to be eliminated, even if an infrared filter is not used, in an imaging device. SOLUTION: A visible light region is detected therein by each detecting unit, after performing wavelength separation through filters C1, C2, C3, while an infrared light region is to be detected by a detection unit, after performing the wavelength separation through a filter C4. An imaging signal, relating to visible light region components eliminated of the influences of infrared light region components is to be acquire, by correcting signals SC1, SC2, SC3 to be detected through the filters C1, C2, C3 using a signal SC4 to be detected through the filter C4. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a particulate arrangement structure, a method of producing the particulate arrangement structure and a method of producing optical medium, capable of improving the optical characteristics, as compared to the conventional practice by enhancing crystallinity of each of objective fine particle layers. SOLUTION: Respective reflective layers 31B, 31G, 31R of three primary colors as the objective fine particle layers are formed self-organizedly on a first base body 21 via a substrate fine particle layer 30, in the order starting from a fine particle layer having smaller particle size. Thereby, each of the reflecting particle layers is always laminated on a substrate layer formed of fine particles, having particle size smaller than those of the fine particles constituting the said particle layer; and, thus the crystallinity of each of the reflecting layers is enhanced. Thereafter, a reflection-type screen in which a blue color reflective layer 31B is arranged on the light incident side is produced through a process of transferring the produced particulate arrangement structure 20A to a second base body 22. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To solve the problem of crystallinity in an imaging apparatus utilizing a band gap. SOLUTION: The band gap is controlled by changing the composition ratio of a mixed crystal system of a compound semiconductor. For example, the absolute value of lattice mismatching Δa is made small by using an AlGaInP-based mixed crystal, an SiGeC-based mixed crystal, a ZnCdSe-based mixed crystal, and an AlGaInN-based mixed crystal. For example, Ge having a lattice constant larger than that of Si is mixed with SiC, thus reducing the absolute value of the lattice mismatching, and increasing crystallinity. At least one superlattice layer having a thickness of approximately 10 nm or smaller is formed at the interface of Si and SiC, or Si and SiGeC-based layer, thus increasing crystallinity further. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To heighten a contrast ratio of a light scattering type display element compared with a conventional one by heightening only a reflectance in white display without heightening a reflectance in black display. SOLUTION: A projecting and recessing layer 22 is laminated on the uppermost surface of a display side substrate portion 2, and a projecting and recessing shaped portion 23 is formed on the surface. The projecting and recessing shaped portion 23 has slopes inclined toward a substrate surface and a light incident surface. A plurality of projecting and recessing shaped portions 23 are formed for each pixel. Due to the fact that the uppermost surface of the display side substrate portion 2 is formed to have a projecting and recessing structure with the slopes, internal reflection is reduced compared with the case of a flat uppermost surface, and, in the white display state, the ratio of light returning to the liquid crystal layer 30 side is reduced. The surface structure of the projecting and recessing layer 22 is not restricted to a curved surface (a spherical surface) with a perfect circle cross section, but is possibly a curved surface recognized as a recessing surface seen from the observer's side. For example, the cross section is optionally an elliptic curved surface, or further a distorted elliptic curved surface. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a particle arrangement structure in which the particle arrangement and its forming speed are hardly influenced by the unevenness of the surface of a substrate and its production method, an optical structure and its production method, and an underlayer particle arrangement structure and its production method. SOLUTION: The surface of a plastic substrate 100 such as a PET film is sand-blasted to prepare a substrate 1. An underlayer particle layer 2 and a second particle layer 3 are laminated on the substrate 1 for example by a self-organization method, or practically by a natural sedimentation method or a pulling-up method. The underlayer particle layer 2 is formed so that the surface unevenness of the substrate 1 is covered completely with particles whose particle size is smaller than that of the particle layer 3, and an upper layer part is a regular arrangement structure. When the second particle layer 3 is formed from silica particles whose diameters are 305 nm, 250 nm, and 220 nm, layers each selectively reflecting red light, green light, and blue light can be formed. By laminating these three layers, a layer which reflects primary three color light can be formed. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method of producing a particulate arrangement structure by which a substrate holding a particulate layer is not limited by a method of producing the particulate layer, and the arrangement of the particulates is hardly affected by the ruggedness of the surface of the substrate, and to provide a method of producing an optical medium. SOLUTION: The surface of a plastic substrate 100 such as a PET film subjected to a sand blast treatment is used as a first substrate 1. Next, a buffer layer 3 and a particulate layer 4 are formed on the first substrate 1, e.g., by a self-organizing method, concretely, by a natural precipitating method or a pulling method. The buffer layer 3 is formed to a thickness in a degree of covering-up the ruggedness of the surface in the first substrate 1 by particulates with a particle diameter smaller than that of the particulates composing the particulate layer 4. Then, an adhesive material layer 18 is formed on the second substrate 2, and the first substrate 1 and the second substrate 2 are press-contacted. Thereafter, the first substrate 1 and the second substrate 2 are separated, and the particulate layer 4 is transferred to the surface of the second substrate 2, so that the particulate-arranged structure 10 is produced. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a structure capable of making mechanical strength strong enough against bending stress, tensile stress, or the like and reducing also peeling and cracking in a particulate deposit layer by inhibiting a material such as a protective film from entering the gaps among the particulates without having an influence on an optical characteristic such as a reflection characteristic when applying that material onto the particulate deposit layer such as photonic crystal. SOLUTION: The particulate structure uses a visible light absorbing body 1 absorbing visible light as a substrate, and silica particulates of a 290 nm diameter are accumulated thereon as a particulate layer 2 for reflecting red light; silica particulates of a 240 nm diameter are accumulated thereon as a particulate layer 3 for reflecting green light; silica particulates of a 210 nm diameter are accumulated thereon as a particulate layer 4 for reflecting blue light; and further on these, a polymer layer 60 or gelatin layer 70 consisting of polymers larger in size than the gaps among the particulates is formed. Moreover, the optical medium such as a reflective screen has a diffusion film 7 on this polymer layer 60 or gelatin layer 70. COPYRIGHT: (C)2004,JPO&NCIPI