Patent application number | Description | Published |
20100103803 | OPTICAL HEAD, OPTICAL DISC DEVICE AND INFORMATION PROCESSING DEVICE - It is aimed to provide an optical head, an optical disc device and an information processing device capable of suppressing the amount of third-order astigmatism created upon recording or reproducing information on or from a multi-layer optical disc including at least three information recording surfaces. | 04-29-2010 |
20100142357 | OBJECTIVE LENS SYSTEM AND OPTICAL PICKUP DEVICE - Provided are an optical pickup device which is compatible with a plurality of disc standards, and can stably monitor the outputs from light sources, and an objective lens system used in the optical pickup device. An optical pickup device | 06-10-2010 |
20100278030 | OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE SAME - An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device | 11-04-2010 |
20120023514 | COMPOUND OBJECTIVE LENS, OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE - A compound objective lens, an optical head device, an optical information device, and an information processing device that can inhibit the occurrence of aberration even when a light beam source wavelength shifts from the designed value. A diffraction structure having a sawtooth or stepwise cross section is formed in the region (R | 01-26-2012 |
20120075978 | Objective Lens Element and Optical Pickup Device - An objective lens element that can suppress occurrence of an aberration is disclosed. Sawtooth-like diffraction structures having different height and cycles (pitches) are provided on an inner part R | 03-29-2012 |
20120075982 | Objective Lens Element and Optical Pickup Device - An optical pickup device is provided which is compatible with at least two types of optical disc standards having different NAs and which controls an effective NA when a light beam for an optical disc standard having a relatively small NA is converged, thereby forming a desired spot. An inner part | 03-29-2012 |
20120163142 | Objective Lens Element and Optical Pickup Device Using the Same - An objective lens element which can obtain appropriate spot performance only by simple position adjustment, and an optical pickup device using the objective lens element are provided. In the objective lens element, an amount of a generated third-order astigmatism of a spot which is formed when symmetry axes of optically functional surfaces are located parallel to the normal line of a base plate and an incident light beam incident such that a central light beam thereof is tilted at 0.5 degree with respect to the normal line of the base plate is converged, is reduced to be less than an amount of a generated spherical aberration of a spot which is formed when the symmetry axes of the optically functional surface are located parallel to the normal line of the base plate and an incident light beam incident parallel to the normal line of the base plate is converged. | 06-28-2012 |
20120163154 | Optical Element and Optical Pickup Device Using the Same - An optical element which has optical steps each providing a phase difference to transmitted light and has low light amount loss and a high efficiency is provided. The optical element includes a symmetry axis, a plurality of optically functional surfaces which are ring-shaped regions around the symmetry axis, and a plurality of wall regions connecting the optically functional surfaces to each other. The optically functional surfaces and the wall regions constitute the optical steps. On a cross-section taken by, as a cutting plane, a plane including the symmetry axis, the contour line of each wall region is substantially parallel to a light beam which is incident on the optically functional surface on the outer side and passes near the wall region. The maximum value of the angle between the symmetry axis and the light beam passing near the wall region is equal to or more than 25 degrees. | 06-28-2012 |
20120163155 | Optical System for Optical Pickup - An optical system for optical pickup includes a magnification conversion optical element moving along an optical axis direction in accordance with each recording surface and an objective lens element converging a light beam incident through the magnification conversion optical element, to form a spot on a corresponding recording surface of the recording surfaces, and satisfies the following formula. | 06-28-2012 |
20120163156 | Objective Lens Element - A high-NA and thin objective lens which prevents occurrence of a crack during lens molding and can stably be molded is provided. The present invention is directed to an objective lens having an optical surface having power which is not negative. The objective lens is a single lens and is formed such that a flat portion which is provided at an outer peripheral portion and perpendicular to the optical axis is closer to a disc surface than the position of the top of an exit-side surface of the objective lens and such that the rate of change in sag of the exit-side surface is continuous across the entire region. | 06-28-2012 |
20120163157 | Optical Element and Optical Pickup Device - An optical element which can be shared by three wavelengths for BD, DVD, and CD and which is easily manufactured is provided. An objective lens system includes an optical element | 06-28-2012 |
20120170122 | Objective Lens Element - An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element | 07-05-2012 |
20120170439 | Objective Lens Element - An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): | 07-05-2012 |
20120207008 | Objective Lens Element and Optical Head Device Including the Same - An objective lens element having improved diffraction efficiency at least one of used wavelengths is provided. The objective lens element includes one surface including: a first region including an optical axis; and a second region surrounding the first region. A periodic first diffraction structure is formed on the first region, and a periodic second diffraction structure different from the first diffraction structure is formed on the second region. The objective lens element satisfies the following conditions. | 08-16-2012 |
20120213052 | OPTICAL HEAD, OPTICAL DISC DEVICE, INFORMATION PROCESSING DEVICE, AND OBJECTIVE LENS - Provided are an optical head capable of favorably recording or reproducing information to or from an information recording medium including a plurality of information recording surfaces, an optical disc device including the optical head, an information processing device including the optical disc, and an objective lens. The optical head ( | 08-23-2012 |
20120287037 | LIGHT-EMITTING DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE AND IMAGE DISPLAY DEVICE THAT USE THE SAME - 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. | 11-15-2012 |
20120320728 | OBJECTIVE LENS, OPTICAL HEAD AND OPTICAL DISK DEVICE - A lens surface ( | 12-20-2012 |
20130002983 | Backlight Device, Liquid Crystal Display Apparatus, and Lens - Provided is a backlight device having: a light source element having LEDs and a lens expanding light from the LEDs; a housing containing the element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the element, toward the diffuser plate. The LEDs are arranged in one or more rows, at a central zone. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. In the exit surface, in an optical-axis-containing sectional plane viewed laterally along the orientation in which the LEDs are arrayed, the len's curvature C in a minute interval along the exit surface is maximum in a range 60°<θ | 01-03-2013 |
20130010230 | Backlight Device and Liquid Crystal Display Apparatus - Provided is a backlight device having: a light source element having LEDs and a lens expanding light from the LEDs; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. The LEDs are arranged in one or more rows, at a central zone. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. The reflection sheet is configured such that the angle between the optical axis of the lens of the light source element, and a line connecting a light emitting surface of each LED of the light source element and an end portion of the backlight device on the long side thereof is within a range of 60°≦θm≦80°. | 01-10-2013 |
20130010231 | Backlight Device and Liquid Crystal Display Apparatus - Provided is a backlight device having: a light source element having light emitting diodes and a lens expanding light from the light emitting diodes; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. In the light source element, a plurality of the lenses are arranged at a central zone, the plurality of lenses being arranged in a plurality of rows. | 01-10-2013 |
20130010457 | Backlight Device and Liquid Crystal Display Apparatus - Provided is a backlight device having: a light source element having light emitting diodes and a lens expanding light from the light emitting diodes; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. In the light source element, the plurality of light emitting diodes and a plurality of the lenses are arranged at a central zone. The luminance distribution of a portion corresponding to the light source element as seen from the diffuser plate has a central region indicating a peak value of luminance, attenuation regions in which luminance gradually attenuates from the central region toward a right end and a left end, and end regions that include a distribution portion in which luminance does not attenuate. | 01-10-2013 |
20130077024 | OPTICAL DEFLECTOR, OPTICAL DEFLECTION APPARATUS, AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE OPTICAL DEFLECTOR AND THE OPTICAL DEFLECTION APPARATUS - 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. | 03-28-2013 |
20130093663 | LIGHT DEFLECTOR AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - 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. | 04-18-2013 |
20130113685 | DISPLAY DEVICE, DISPLAY METHOD, INTEGRATED CIRCUIT, PROGRAM - 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. | 05-09-2013 |
20130113767 | IMAGE DISPLAY DEVICE, IMAGE DISPLAY METHOD, AND INTEGRATED CIRCUIT - 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. | 05-09-2013 |
20130169704 | IMAGE DISPLAY APPARATUS - An image display apparatus according to the present disclosure includes: an image display panel; a backlight device; a first optical element located between the image display panel and the backlight device and configured to deflect a light incident thereon; a second optical element located between the first optical element and the image display panel and configured to change a deflection angle of emitted light according to a voltage applied thereto; a plurality of first lenses located between the first optical element and the backlight device; a plurality of second lenses located between the second optical element and the image display panel; a position detection section configured to detect a viewing position of a viewer; and a control section configured to control the voltage applied to the second optical element, according to the detected viewing position. The first lenses and the second lenses constitute an afocal optical system. | 07-04-2013 |
20130170042 | OBJECTIVE LENS ELEMENT - An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): | 07-04-2013 |
20130201425 | BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY APPARATUS - Provided is a backlight device having: a light source element having LEDs and a lens expanding light from the LEDs; a housing containing the element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the element, toward the diffuser plate. The LEDs are arranged in one or more rows, at a central zone. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. A plurality of the lenses are provided such that the arrangement intervals of the individual lenses at a center and edge regions of the light source element are narrow and dense, and the arrangement intervals of the individual lenses at intervening regions between the center and the edge regions are wide in comparison with those at the center and the edge regions. | 08-08-2013 |
20130201426 | BACKLIGHT DEVICE, LIQUID CRYSTAL DISPLAY APPARATUS, AND LENS - Provided is a backlight device having: a light source element having LEDs and a lens expanding light from the LEDs; a housing containing the element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the element, toward the diffuser plate. The LEDs are arranged in one or more rows, at a central zone. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. The incident surface is a continuous concave surface, and the projected shape thereof as seen from an upper surface of the lens is an ellipse centered on an optical axis of the lens. | 08-08-2013 |
20130222234 | IMAGE DISPLAY APPARATUS - The present disclosure realizes an image display apparatus that can make the emission angle range of emitted light bilaterally symmetrical, at low cost, irrespective of the material refractive index of a prism composing a liquid crystal prism. An image display apparatus | 08-29-2013 |
20130286344 | LIQUID CRYSTAL OPTICAL ELEMENT AND IMAGE DISPLAY APPARATUS INCLUDING THE SAME - A liquid crystal prism element includes: a first prism array; a second prism array arranged so as to face the first prism array; and a liquid crystal layer provided between the first and second prism arrays. The first prism array is composed of a plurality of first prisms that have ridge lines extending in a Y axis direction and are arranged so as to be spaced apart from each other at predetermined intervals in an X axis direction The second prism array is composed of second prisms that have ridge lines extending in the Y axis direction and are arranged so as to be spaced apart from each other at predetermined intervals in the X axis direction. Each first prism has an inclined surface facing a center side of the liquid crystal layer. Each second prism has an inclined surface facing the center side of the liquid crystal layer. | 10-31-2013 |
20140146653 | OBJECTIVE LENS ELEMENT AND OPTICAL HEAD DEVICE INCLUDING THE SAME - An objective lens element having improved diffraction efficiency at at least one of used wavelengths is provided. The objective lens element includes one surface including: a first region including an optical axis; and a second region surrounding the first region. A periodic first diffraction structure is formed on the first region, and a periodic second diffraction structure different from the first diffraction structure is formed on the second region. The objective lens element satisfies the following conditions. | 05-29-2014 |
20140176835 | LIQUID CRYSTAL OPTICAL ELEMENT AND IMAGE DISPLAY APPARATUS INCLUDING THE SAME - A liquid crystal optical element according to the present disclosure includes: a prism array composed of a plurality of prisms that have ridge lines extending in a first direction and are arranged in a second direction orthogonal to the first direction; a liquid crystal layer provided on the prism array; and an electrode via which a voltage is applied to the liquid crystal layer. When the voltage applied to the liquid crystal layer is 0 volt, long axes of liquid crystal molecules of the liquid crystal layer are oriented so as to be inclined at a predetermined angle relative to the first direction in a plane orthogonal to the second direction. | 06-26-2014 |
20140247211 | IMAGE DISPLAY APPARATUS - An image display apparatus capable of ensuring a wide view range is provided. The image display apparatus includes: an image display panel; a backlight located on a back surface side of the image display panel; prisms located between the image display panel and the backlight and configured to deflect incident light; a liquid crystal layer located between the image display panel and the backlight and configured to change a deflection direction of emitted light by changing a refractive index thereof according to a voltage applied thereto; a position detection section configured to detect a position of a user; and a control section configured to control the voltage applied to the liquid crystal layer, on the basis of information of the position of the user detected by the position detection section. | 09-04-2014 |
20140247493 | OBJECTIVE LENS ELEMENT - An objective lens element which has excellent compatibility with optical discs having different base material thicknesses is provided. An objective lens element | 09-04-2014 |
20150036209 | LIGHT DEFLECTION ELEMENT AND IMAGE DISPLAY APPARATUS USING THE SAME - A light deflection element is capable of deflecting incident light so as to follow a position of an observer and suppressing reduction in intensity of light that reaches eyes of the observer regardless of their position. The light deflection element includes: a first optical element configured to deflect incident light; a second optical element configured to change a deflection direction of emitted light by changing a refractive index thereof according to a voltage applied thereto; a third optical element; and a control section configured to control the voltage applied to the second optical element. At least one of interfaces between the first and second optical elements and the second and third optical elements is an aspheric surface. The aspheric surface has an optical power that compensates enlargement of the emitted light which is caused by refractive index distribution caused when a voltage is applied to the second optical element. | 02-05-2015 |
20150085214 | LIQUID CRYSTAL LENS AND IMAGE DISPLAY APPARATUS INCLUDING THE SAME - A liquid crystal lens according to the present disclosure includes: a first electrode; a plurality of second electrodes arranged in a stripe manner, each second electrode facing the first electrode; a liquid crystal layer provided between the first electrode and the second electrodes, the liquid crystal layer including liquid crystal molecules whose orientation changes in accordance with a voltage applied between the first electrode and the second electrodes, the liquid crystal layer serving as a lens when a refractive index distribution occurs therein due to change in the orientation of the liquid crystal molecules. In the liquid crystal lens, a direction of initial orientation of the liquid crystal molecules is substantially parallel to an extending direction of the second electrodes. | 03-26-2015 |
20150338670 | IMAGE DISPLAY APPARATUS - The present disclosure provides an image display apparatus having excellent light converging characteristics. The image display apparatus includes: a liquid crystal prism element including a prism array in which a plurality of prisms are arranged, a liquid crystal layer laminated on the prism array, and electrodes provided at position corresponding to the respective prisms which form the prism array; a control section configured to control a voltage to be applied to each electrode; and a position detection section configured to detect a viewing position of a user. The control section is able to apply the same or different voltages to the respective electrodes provided at the positions corresponding to the respective prisms, on the basis of a result of the detection of the viewing position by the position detection section. | 11-26-2015 |