Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device in which luminance spot is suppressed.SOLUTION: A filter 50 is arranged between a projection optical system 12 and a light guide device 20, and changes a spatial distribution of a transmitted light volume. Consequently, an image with suppressed luminance spot is displayed to an observer, even when the image as the virtual image formed by the projection optical system and a light guide device 20 has a comparatively large luminance spot. Thus, the virtual image displayed by a virtual image display device 100 is made high quality while enlarging the size of the displayed image.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device with which display size of a virtual image can be enlarged with a simple configuration, and an excellent see through observation can be implemented.SOLUTION: A supporting frame 123 includes a light transmission section 23k that constitutes a see-through section B4 by being combined with a light guide member 21. Consequently, observation of an external world by see-through with the see-through section B4 is achieved by attaching the light guide member 21 for observation of image light to the supporting frame 123. Further, by arranging a light transmission section 23h on the supporting frame 123, the strength of the supporting frame 123 is enhanced while weight saving the light guide member 21.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate for a virtual image display device and a virtual image display device which can suppress brightness unevenness and image unevenness and can emit virtual image light with an inexpensive technique.SOLUTION: In the light guide plate which guides virtual image light into an observer with a discontinuous reflection unit, a reflection film formation region and a reflection film non-formation region are formed on a first reflection surface 23a or a second reflection surface 23b of a reflection unit 23c in a state in which the regions are mixed.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device capable of setting the aspect ratio of image light entering the eyes of an observer as a virtual image to a desired state while fulfilling design limitations to some extent.SOLUTION: An inventive virtual image display device 100 can convert the aspect ratio of a formed virtual image into the aspect ratio (16:9) laterally longer than the original aspect ratio (4:3) of the image area of an image display element 11 by means of expansion conversion in an aspect ratio conversion optical system 15. Thus, the aspect ratio of image light to be recognized as a virtual image by the eye of the observer can be adjusted to a desired state (e.g., the aspect ratio of 16:9) by the aspect conversion in the cylindrical lenses 15a, 15b even in the case in which, for example, the lateral width WD of an image forming device 10 including the image display device 11 with respect to the whole of the virtual image display device 100 is limited by a design requirement and therefore the image area fails to have a relatively landscape aspect ratio (e.g., 16:9) required as a picture, but has a ratio approximating square (e.g., the aspect ratio of 4:3).
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a light guide plate in which void generation between a reflection plane for extracting image light and a resin for burying the reflection plane or the like is suppressed and in a see-through type light guide plate, a transmission image can be prevented from blurring.SOLUTION: A resin material PM positioned at the deepest side of a sawtooth-shaped part DT is preferentially cured to avoid void generation between the resin material and a reflection membrane MB and to maintain optical characteristics of the reflection membrane MB, namely, of reflection planes 23a and 23b excellent, thereby improving a definition of a light guide plate 20. Furthermore, by suppressing cyclic swell occurrence caused by shrinkage on a surface, a front face FF having desired flatness can be formed in a flattening step that is a final step of manufacturing an ultraviolet-curable resin member Qa. Therefore, when using the light guide plate 20 as a see-through type, an outer field image is prevented from being blurred or disturbed.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate for a virtual image display device and the virtual image display device having the light guide plate incorporated therein capable of acquiring high accuracy in manufacturing a mold, prolonging a service life thereof and improving manufacturing throughput thereof while reducing manufacturing cost thereof.SOLUTION: Since a first reflection surface 23a of an imaging section 23 has an inclination angle α, a flat surface having high flatness can be relatively easily segmented and the imaging section 23 having high reflection characteristics can be manufactured in manufacturing of a mold for forming the first reflection surface 23a. In addition, since it is possible to enhance releasability with respect to a section of the imaging section 23 in manufacturing process thereof, a longer service life of the mold can be obtained due to a reduced load applied thereto and manufacturing throughput of a light guide plate 20 is enhanced. Consequently, manufacturing cost of the light guide plate 20 can be reduced.
Abstract:
PROBLEM TO BE SOLVED: To provide a light scanning device for displaying an image with high color reproducibility by use of light beams, and an image display device.SOLUTION: The light scanning device includes: at least four light sources 101R, 101Y, 101G1, 101G2, 101B that provide light beams having different wavelength spectra; and a scanner part 200 that scans the light beams from the light sources 101R, 101Y, 101G1, 101G2, 101B in a first direction and a second direction substantially perpendicular to the first direction.
Abstract:
PROBLEM TO BE SOLVED: To prevent blurred image displaying with trailing and to further increase uniformity of lightness among respective regions (the whole of one screen) and uniformity of lightness in each region.SOLUTION: An image display device has: solid-state light sources L11 to L15, L21 to L25, and L31 to L35 which respectively illuminate a plurality of regions A1, A2, and A3 into which a panel surface of an electro-optical modulating device (liquid crystal display panel 11) is divided; and a light source control section 102 which controls lighting of the solid-state light sources. The light source control section 102 controls lighting of the solid-state light sources for respective regions in synchronism with writing of image data to the electro-optical modulating device, wherein the control of lighting is carried out so that a solid-state light source corresponding to at least one of the plurality of regions is turned off in a write period for a one screen portion of image data. The light source control section 102 controls lighting for furthermore increasing the uniformity of lightness among the respective regions (the whole of one screen) and the uniformity of lightness in each region.
Abstract:
PROBLEM TO BE SOLVED: To provide a projector with an optical system having the high degree of freedom in selection of a projection lens. SOLUTION: An intermediate image 200 is formed in predetermined size at an imaging position P1 predetermined in advance between a mount 12 and an intermediate image forming part 100. Since a flange back FB1 of a first projection lens 60 and a flange back FB2 of a second projection lens 70 are constituted to be nearly the same as a distance from the mount 12 to the imaging position of the intermediate image 200, the first projection lens 60 and the second projection lens 70 are focused at the intermediate image 200. Therefore, a sharp image in focus is projected onto a screen 50. A user may use the first projection lens 60 and the second projection lens 70 properly in accordance with the installation position of the projector 10 and desired image quality. For example, in a case where the projector 10 is installed near the screen 50, the user may select the second projection lens 70 which is a short-focus lens. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent trailing, blurred image display and to increase the uniformity of brightness between regions (for one entire screen) and the uniformity of brightness within each region. SOLUTION: An image display apparatus has solid light sources L11-L15, L21-L25, L31-L35 for respective regions, for illuminating the respective regions A1, A2, A3 formed by dividing a panel surface of an electrochemical modulation apparatus (liquid-crystal display panel 11) into a plurality of regions, and a light source control unit 102 for controlling the lighting of the solid light sources. The light source control unit 102 controls the lighting of the solid light sources for each region in synchronism with the writing of image data to the electrochemical modulation apparatus. The lighting control is such that during the period of writing of the image data for one screen, the solid light source corresponding to at least one of the plurality of regions is turned off. Further, lighting control or the like for further increasing the uniformity of brightness between the regions (for one entire screen) and the uniformity of brightness in each region is performed. COPYRIGHT: (C)2009,JPO&INPIT