Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device in which a display size of a virtual image may be increased with a simple structure, what is called an Eyring diameter may be largely secured and see-through observation may be satisfactorily performed.SOLUTION: Image light GL reflected by a third reflection surface 21c of a light incident part B1 is propagated while being totally reflected by first and second reflection surfaces 21a and 21b of a light guiding part, and is reflected by a fourth reflection surface 21d of a light emission part B3, so as to enter eyes EY of an observer as a virtual image. At this point, since the number of reflections caused in the light guiding part of first image light GL11 and GL12 emitted from a first partial region A10 of an image display device 11 is different from the number of reflections caused in the light guiding part B2 of second image light GL21 and GL22 emitted from a second partial region A20 of the image display device 11, the image light GL emitted from the different partial regions A10 and A20 of the image display device 11 may be taken in with a comparatively wide viewing angle.
Abstract:
PROBLEM TO BE SOLVED: To reduce the thickness of an image reading device having a light guide member for guiding light from a light source to an object.SOLUTION: The image reading device includes: a light source; a light guide member for guiding light emitted from the light source to irradiate an object; an image forming optical system for reflecting light directed in a first direction from the object in a second direction intersecting the first direction via a reflection surface disposed in the first direction of the object, and converging the light reflected by the reflection surface in the second direction via an emission section arranged in the second direction of the reflection surface, to form an erecting same magnification image of the object in the second direction of the emission section; and an optical sensor disposed in the second direction of the emission section of the image forming optical system to detect the erecting same magnification image formed by the image forming optical system. The light guide member is disposed on the object side of the emission section with respect to the first direction.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device capable of preventing luminance unevenness and image unevenness of image light relatively easily.SOLUTION: In a virtual image display device, a large number of illuminating light reflecting faces 15c of an image light forming device 10 change reflection efficiency depending on the position of the reference direction (similarly Z direction) of a backlight guiding plate 15b which is a direction corresponding to a repetitive arrangement direction (Z direction) of a large number of image light reflecting faces of an image light guide plate. Thus, in the image light forming device 10, illumination light PL can be formed so as to compensate luminance unevenness and image unevenness of image light formed at the side of the image light guide plate and luminance unevenness and image unevenness of image light can be prevented relatively easily.
Abstract:
PROBLEM TO BE SOLVED: To provide a projector which efficiently utilizes light at low cost.SOLUTION: The projector includes: light sources 10R, 10G, and 10B for emitting laser beams; liquid crystal display devices 12R, 12G, and 12B being spatial light modulators for modulating the laser beams according to an image signal; a projection optical system 16 for projecting the laser beams subjected to modulation by the spatial light modulators; and phosphors 14R, 14G, and 14B which are excited by irradiation with excitation light and emit the fluorescence of predetermined wavelength ranges. The phosphors 14R, 14G, and 14B are disposed in an optical path between the spatial light modulators and the projection optical system 16, and excited by the incidence of light passing through the spatial light modulators as the excitation light.
Abstract:
PROBLEM TO BE SOLVED: To provide a blood vessel display device that displays a blood vessel image, which is clear and has no positional deviation from the actual blood vessels, on a body tissue surface.SOLUTION: The blood vessel display device 100 includes: a detection means that scans an arm 600 with laser beam for detection and detects reflected light from an irradiated part 610 of the arm 600 which has been irradiated with the laser beam for detection; an image data generating unit that detects a surface shape of the irradiated part 610 and the arrangement of blood vessels, which are present in a superficial layer of the irradiated part 610, on the basis of a detection result of the detection unit and generates image data of an image 900 for visualizing the blood vessels displayed on the irradiated part 610; and a display means that displays the image 900 for visualizing the blood vessels 620 on the irradiated part 610 by scanning the irradiated part 610 with laser beam for display on the basis of the image data generated by the image data generating unit 900.
Abstract:
PROBLEM TO BE SOLVED: To provide: a display device with which an apparent dynamic range is expanded and which has little color change; a direct-view display device; and a projection display device. SOLUTION: The display device includes a light modulation means having a plurality of pixels and displays an image according to an image signal. The display device includes a light source for illuminating the light modulation means. The display device includes a light source-driving means which controls the quantity of light emitted from the light source by adjusting the time when the light source is lit up with a predetermined intensity for one unit time. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent a high intensity laser beam from accidentally entering an eye of an observer. SOLUTION: A projector of rear-projection type includes a light source 101 that outputs a laser beam and a scanner 106 that scans a screen 120 with the laser beam. At least one optical member (lens optical system 103, scanner 106, reflection mirror 109 and screen 120 or the like) located in an optical path of the laser beam is configured so as to be broken or altered in quality and to prevent or discourage the beam with energy exceeding the accessible emission limit from being output from the screen 120, when a laser beam with energy exceeds an accessible emission limit due to failure of the light source 101 or the scanner 106. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting device having a novel light-emitting element capable of reducing speckle noise and having high output. SOLUTION: The light-emitting device 1000 includes a mounting module 160 and the light-emitting element 100 mounted on the upper part of the mounting module, wherein the light-emitting element has a first clad layer, an active layer formed thereon and a second clad layer formed thereon, at least one part of the active layer configures a gain region 180, the gain region is provided in a direction inclined to a perpendicular P of a first side face 107 from a first side face 107 to a second side face 109 when viewed on a plane, and the mounting module has a first reflection surface 162 for reflecting a first emitted light L1 emitted from the first end face 170 of the first side face side of the gain region toward the upper part of the light-emitting element, and a second reflection surface 164 for reflecting a second emitted light L2 emitted from the second end face 172 of the second side face side of the gain region toward the upper part of the light-emitting element. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide technology capable of suppressing the very largeness of a power supply circuit and driving in a control mode suitable depending on the application, with respect to a laser light source device equipped with a wavelength conversion component. SOLUTION: The laser light source device 100 includes: a light source section including first and second fundamental light sources for emitting first and second fundamental wave light beams according to supplied drive currents respectively and a wavelength conversion component for allowing incidence thereon of the first and second fundamental light beams to produce first and second converted light beams by wavelength conversion; and a drive current controller 25 capable of controlling the drive currents supplied to respective fundamental light sources. The first and second fundamental light sources emit the fundamental wave light beams such that the first and second converted light beams substantially have the same color and timings of reaching peaks of amounts of the first and second converted light beams do not mutually overlap. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide light source equipment capable of obtaining stable laser beam output and improving the conversion efficiency of a wavelength conversion element, and to provide an image display device, a projector, and a monitoring device. SOLUTION: Temperature detection starts before the temperature of the wavelength conversion element begins to become stable (T 1 -T 2 in Fig. 3) after pulse emission starts, thus preventing an error from occurring between the phase matching temperature of the wavelength conversion element and actual temperature in detection considering the relationship between the thermal capacity of the wavelength conversion element and that of a thermistor, and detecting the phase matching temperature considering the wavelength absorption content of the wavelength conversion element reliably. COPYRIGHT: (C)2008,JPO&INPIT