Abstract:
PROBLEM TO BE SOLVED: To provide a display device capable of achieving high contrast, and high-speed response.SOLUTION: An electrophoretic element includes electrophoretic particles and a porous layer formed by a fibrous structure containing non-electrophoretic particles having different optical reflection properties from the electrophoretic particles in an insulating liquid. The insulating liquid contains two kinds of components different in a dissolution parameter value. The dissolution parameter value of the fibrous structure is larger than that of a particle surface of the electrophoretic particle, and the dissolution parameter value of the particle surface of the electrophoretic particle is larger than those of two kinds of the components.
Abstract:
PROBLEM TO BE SOLVED: To provide a lighting device capable of inhibiting chromatic variation by a visibility angle and an incident angle. SOLUTION: In the lighting device provided with a blue light emitting diode 10 as a light source and a phosphor sheet 21 containing a phosphor body capable of obtaining a white color light from the blue color light from the blue color light emitting diode 10 through color conversion, diffusion plates 22, 23 are arranged to face each of a light emitting side surface and a light incident side of the fluorescent sheet 21. The diffusion plate 22 arranged to face the emitting side surface of the fluorescent sheet 21 reduces a variation of a white color chromaticity by the visibility angle, and the diffusion sheet 23 arranged to face the incident side surface of the fluorescent sheet 21 reduces a variation of a white color chromaticity by the incident angle. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wire grid polarization film which exhibits excellent wire grid characteristics, and to provide a liquid crystal display excellent in image display performance using the wire grid polarization film. SOLUTION: The wire grid polarization film 10 includes: a film-like transparent substrate 11; a grid structure layer 12 which is disposed on the substrate 11 and has a one-dimensional grid-like ruggedness; and metal films 13 disposed on protruded parts 12a of the grid structure layer 12, wherein the substrate 11 is a polymer plastic film 11a made of an amorphous polyolefin of which the coefficient of water absorption is smaller than that of polyethylene naphthalate (PEN). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a compact and large-capacity hard disk device. SOLUTION: A head part 3A constituting the hard disk device is provided with a light-transmitting/receiving board 11 provided with a VCSEL 111 and a photodetector 112; and a probe 131 having an opening part 131a generating near field light, based on light rays emitted from the VCSEL 111. Cores 121, 122 being an optical waveguide 12B for guiding the light rays emitted from the VCSEL 111 to the opening part 131a of the probe 131 and guiding light rays that entered from the opening part 131a to the photodetector 112 are provided integrally with a probe slider 13, in which an air lubricating plane 134 is formed at a plane, provided with the opening part 131a in between the light-transmitting/receiving board 11 and the probe slider 13. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a laser beam oscillation mode detector, and also to provide a laser device utilizing the same detector. SOLUTION: Interference fringes are generated at a light-receiving surface of a photodetector 17, utilizing the difference in the optical paths of the optical beams reflected at the front surface and the rear surface of an optical wedge 16, by guiding the laser beam to the optical wedge 16. This interference fringe changes pattern, according to the oscillation mode of the laser beam. The photodetector 17 is constituted of a plurality of photodetectors for detecting, with an arithmetic controller 30, a comparison signal, indicating the ratio of the minimum value and the maximum value of the output signals detected from each photodetector. Here, each photodetector is arranged previously to provide changes in the comparison signal value, according to the oscillation mode of the laser beam. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To operate a laser device in the area of a stable usable mode. SOLUTION: In the external resonance type laser device having a mode detector, the mode detector is provided with an optical wedge 16 and a hop mode detection disk 17. Interference fringes are generated in the light receiving surface of the hop mode detection disk 17 to detect a mode detection signal according to an oscillation mode of a laser beam. A controller 30 reduces a current flowing through a laser diode 11, detects the movement of a mode from a current oscillation mode to other oscillation mode by a mode detection signal, and controls a diode current flowing through the laser diode 11 to stay in the current oscillation mode. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To change wavelengths of laser beams from a laser device according to the temperature of a hologram recording medium. SOLUTION: The laser device is equipped with a laser diode 11 which oscillates in multiple modes, a grating 13 which makes first-order diffracted light return to the laser diode 11, and a mirror 14, wherein the grating 13 and the mirror 14 are rotated by gear mechanism 41b, 41c and a motor 41a while keeping the angle between the grating surface 13a and the mirror surface 14a constant so as to obtain the laser beam 25 of a predetermined wavelength. A control section 30 controls the wavelength of the laser light 25 on the basis of the temperature by a temperature detector which detects the temperature of a hologram recording medium. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of detecting a spectrum and mode transition of laser light emitted from an external resonator type laser light source. SOLUTION: The external resonant laser 10 comprises, for detection of generation of mode hop, an external-resonator laser light source 2 for emitting a source light beam 17; an optical wedge 1 for separating the source light beam 17 into a light beam 18 for detection and a light beam 19 for output, and for changing the length of optical path in the direction of axis x as the predetermined direction at the cross-section almost orthogonally crossing the progressing direction of the light beam 18 for detection; a 2-split detector 3 for detecting luminance of interference fringe generated in the direction of x axis which is changing in accordance with wavelength of the light beam 18 for detection; a differential arithmetic unit for detecting a difference signal S3d from the 2-split detector 3; and a mode transition detector for detecting a transition signal indicating transition of spectrum mode through determination in result of comparison between quantity of change of the arithmetic difference signal S3dc based on the difference signal S3d and the threshold value ΔTh. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To ensure the detection of changes in laser wavelength even in a tunable laser. SOLUTION: A laser beam emitted from an external resonator-type semiconductor laser enters into an optical wedge, and a reflected light which generates interference fringes of the optical wedge is received by two pairs of 2-divisional detectors PD1, PD2 for detection of any wavelength change due to mode hopping. A distance L between centers of the two pairs of 2-divisional detectors PD1, PD2 is set at a distance that is approximately an odd multiple of one-quarter cycle of an interference fringe. Due to this distance setting, when one of the 2-divisional detectors is in a position inconvenient for wavelength detection, the other of the 2-divisional detectors may be used. COPYRIGHT: (C)2007,JPO&INPIT