Abstract: An image display device includes a laser source for emitting a laser beam, an image forming element which uses the laser beam to emit image light for displaying an image, a first diffraction element for diffracting the image light, and a controller for controlling a display position of the image on the basis of a wavelength of the laser beam and a temperature of the first diffraction element.

Abstract: Included is a light emitting unit, an optical deflector, a control unit, and a liquid crystal panel. The optical deflector includes a first optical deflector and a second optical deflector which are arranged side by side in a direction from a light incident side to a light emitting side. A maximum light deflection angle of the first optical deflector is smaller than a maximum light deflection angle of the second optical deflector, and a maximum light deflection speed of the first optical deflector is higher than a maximum light deflection speed of the second optical deflector. The first optical deflector includes a first optical deflection layer and a second optical deflection layer stacked in the direction from the light incident side to the light emitting side. Each of the first and second optical deflection layers includes the liquid crystal deflection elements arranged in the planar state.

Abstract: A transmissive display device includes: a light source which outputs light; a display part which receives the light from the light source and generates display light representing an image; a deflecting element which changes a direction of the display light emitted from the display part; and a transmissive reflector which reflects, towards a user, light of a wavelength included in the display light emitted from the display part, and transmits light of other wavelengths. An angle formed by a straight line, which extends between an upper edge of an incident area of the display light on the transmissive reflector and a lower portion of an eyebox which is defined as a visible range of the reflected light from the transmissive reflector, with respect to a horizontal line is smaller than a difference between an emission angle and an incident angle of the display light at the transmissive reflector.

Abstract: A light deflector which deflects incident light and emits the deflected light, by changing a refractive index of a liquid crystal: a pair of ITO films; a plurality of prisms which are provided between the pair of transparent electrodes and are arranged on a facing surface of one of the pair of transparent electrodes, the facing surface facing a surface of the other one of the pair of transparent electrodes; two spacers arranged between the pair of transparent electrodes, and having, in a direction from one of the pair of transparent electrodes toward the other, widths which (i) are greater than widths of the prisms and (ii) are identical to each other; and a liquid crystal which is provided, within a space between the pair of transparent electrodes, in a portion other than a portion where the prisms and the two spacers exist.

Abstract: A stereoscopic image display apparatus including: a light source unit; a light guide plate having an incidence surface and an emission surface; and a liquid-crystal panel which spatially modulates light. The light source unit emits the light so that the light is incident on the incidence surface in the first and second directions for the right and left eyes of a viewer, which are different from each other and each is inclined at a predetermined angle in the emission surface with respect to a reference direction perpendicular to an alignment direction of the right and left eyes of the viewer. Also, the light emitted from the emission surface of the light guide plate is in a direction which is determined according to the propagation direction of the incident light and in which a component in the alignment direction, included in the propagation direction, is maintained.

Abstract: A display apparatus, includes: a display light emission unit which includes a light source, forms an image, and emits display light corresponding to formed image; a deflection unit which deflects the display light; a narrow band reflection unit which has characteristics of reflecting only light in a reflected wavelength range and transmitting light of wavelengths other than the reflected wavelength range, and reflects the display light incident from the deflection unit towards a viewpoint; and a control unit which changes an incidence angle at which the display light is incident on the narrow band reflection unit, in accordance with change in a wavelength of the light, wherein the narrow band reflection unit is configured such that the reflected wavelength range changes when an incidence angle of light changes, and the control unit changes the incidence angle such that a wavelength of the light is included within the reflected wavelength range.

Abstract: A display device includes: a first light source which emits light; a second light source which emits light; a display panel which displays an image; a first light guide plate and a second light guide plate which guide, to the display panel, the light from the first light source and the light from the second light source, respectively; and a control unit which causes one of the first light source and the second light source to emit the light. A first divergence angle obtained when the light from the first light source enters the first light guide plate is larger than a second divergence angle obtained when the light from the second light source enters the second light guide plate.

Abstract: The present application discloses a see-through display device a light source configured to emit light, a projection optical system configured to project image light generated from the light; a transmissive hologram including a first surface which the image light enters from the projection optical system; and an interface configured to cause Fresnel reflection of the image light deflected by the hologram. The hologram includes a first interference fringe recorded by object light and reference light which are incident on the first surface by means of two-light flux interference. The image light incident on the first surface is deflected by the first interference fringe toward the interface. The interface reflects the image light toward the first surface.

Abstract: Included is a light emitting unit, an optical deflector, a control unit, and a liquid crystal panel. The optical deflector includes a first optical deflector and a second optical deflector which are arranged side by side in a direction from a light incident side to a light emitting side. A maximum light deflection angle of the first optical deflector is smaller than a maximum light deflection angle of the second optical deflector, and a maximum light deflection speed of the first optical deflector is higher than a maximum light deflection speed of the second optical deflector. The first optical deflector includes a first optical deflection layer and a second optical deflection layer stacked in the direction from the light incident side to the light emitting side. Each of the first and second optical deflection layers includes the liquid crystal deflection elements arranged in the planar state.

Abstract: An LCD backlight has a light source that emits a laser light, a lens, a mirror, a rotary polygon mirror, a scanning lens and a return mirror constituting a transforming optical system that transforms the laser light from the light source to a linear light. A light guiding plate allows the linear light to enter and emits two-dimensional light in the horizontal direction. An emission end face of the light source is disposed in a rear face side of the light guiding plate so that a surface normal line thereof is in the horizontal direction or is inclined downward from the horizontal direction. The lens, mirror and scanning lens are disposed in the rear face side of the light guiding plate, so that surface normal lines of the light transmission surface and light reflection surface thereof are all in the horizontal direction or are inclined downward from the horizontal direction.

Abstract: An image display device including a light source, an image display unit including plural pixels, a deflection unit which includes plural regions and deflects, for each of the plural regions, a light beam traveling from the light source toward the image display unit, and a light control unit which controls the deflection unit to cause each of light beams passing through a corresponding one of the regions of the deflection unit to be deflected toward one of a first point and a second point that are different from each other, according to a pixel value of the pixel corresponding to the region.

Abstract: A display device includes: a light source which emits light; a position detection unit which detects an eye position of a user; a light deflection unit which deflects the emitted light toward the eye position detected by the position detection unit; a user identification unit which identifies which one of persons is the user; a deflection control unit which controls a deflecting direction in which the light deflection unit deflects the light, depending on the person identified as the user; and a liquid crystal display panel which receives the light from the light deflection unit and display an image formed by the light.

Abstract: A light deflector capable of deflecting light in a predetermined deflection direction and modulating the angle of deflection of light includes a plurality of liquid crystal deflection elements arranged in the predetermined deflection direction. In at least one pair of adjacent liquid crystal deflection elements, the dimension of one of the liquid crystal deflection elements in the predetermined deflection direction is different from the dimension of the other liquid crystal deflection element in the predetermined deflection direction.

Abstract: It is aimed to provide an LCD backlight device and liquid crystal display that can suppress light quantity loss and ensure uniform brightness. An LCD backlight device 101 has a laser light source 1 that emits laser light, and a light guiding plate 3 that transforms the laser light from the laser light source 1 into linear laser light, and transforms the linear laser light into a planar laser light, and emits the planar laser light, and the light guiding plate 3 has a third side face 6 that transforms the linear laser light into the planar laser light by reflecting the linear laser light by a plurality of reflection surfaces that are formed along the entrance direction of the linear laser light.

Abstract: A wavelength conversion laser light source includes an element temperature switching section that switches a temperature of the wavelength conversion element according to a harmonic wave output value as set in an output setting device, and the element temperature switching section for switching a temperature of a wavelength conversion element according to a harmonic wave output level as set in the output setting device. The element temperature switch section includes an element temperature holding section that holds the wavelength conversion element at the temperature as switched by the element temperature switching section.

Abstract: An optical deflector which deflects incident light, includes an optical deflection element which deflects the incident light when a distribution of internal refraction indexes of the optical deflection element is modulated. The light incident on the optical deflection element is emitted from the optical deflection element after passing through the optical deflection element a plurality of times.

Abstract: A wavelength selection substrate 23 is configured with a wavelength selection section 23R which transmits only red laser light and reflects other light components, a wavelength selection section 23G which transmits only a green laser light and reflects other light components, and a wavelength selection section 23B which transmits only a blue laser light and reflects other light components. Of laser light 12 outputted from a light guide plate 14, a laser light component that corresponds to a color passing through one of the wavelength selection sections passes through the wavelength selection substrate 23 and enters a liquid crystal panel 22, whereas a laser light component that does not correspond to the color is reflected from the wavelength selection substrate 23 and returns the light guide plate 14. The laser light having returned the light guide plate 14 is reflected from the reflection plate 21 and again enters the wavelength selection substrate 23.

Abstract: A light-emitting device used in a liquid crystal display device is provided with a planar illuminator that focuses emitted light on a predetermined light focus point, and an optical deflector that two dimensionally deflects the light from the planar illuminator. The planar illuminator switches an emission direction of the light to enable alternate switching between a first light focus state in which the predetermined light focus point is the position of a right eye of a viewer and a second light focus state in which the predetermined light focus point is the position of a left eye of the viewer. The optical deflector can modulate each of the predetermined light focus point in the first light focus state and the predetermined light focus point in the second light focus state according to movement of the viewer.

Abstract: An optical scanning device includes at least one laser light source for emitting a laser light; a deflection section for deflecting and scanning the laser light emitted from the at least one laser light source; and a light guide plate of which a side surface is irradiated with the laser light deflected and scanned by the deflection section. The at least one laser light source includes a multi-mode fiber light source, or a broad-stripe semiconductor laser light source arranged such that a vertical direction of a stripe structure is parallel to a scanning direction. An exit pupil in a thickness direction, which is perpendicular to the scanning direction, is formed at least in one area on the side surface of the light guide plate.

Abstract: A wavelength conversion device includes a laser light source that emits a fundamental wave; a wavelength conversion element that converts the fundamental wave into a second harmonic wave; and an optical system including a wavelength selective mirror that reflects the fundamental wave transmitted through the wavelength conversion element without being converted into the second harmonic wave, while transmitting therethrough the second harmonic wave generated by wavelength conversion, wherein the optical system makes the fundamental wave transmitted through the wavelength conversion element without being converted into the second harmonic wave enter the wavelength conversion element again to be subjected to wavelength conversion once or more than once, while being focused by the wavelength selective mirror, and the conversion efficiency in at least one of the second stage and stages subsequent to the second stage is higher than the conversion efficiency in the first stage, where the conversion efficiency in each