摘要:
A receiving circuit includes a termination resistance circuit and a resistance adjustment circuit. The termination resistance circuit is configured to receive a first differential signal via a first input terminal and a second differential signal via a second input terminal, and to be selectively connected to the first and second input terminals. The termination resistance circuit has an adjustable resistance value. The resistance adjustment circuit is configured to decrease the resistance value of the termination resistance circuit in response to a signal reception preparation command and connection of the termination resistance circuit to the first and second input terminals.
摘要:
A method and an apparatus for resource allocation scheduling in a wireless communication system are provided. The apparatus includes a scheduler for, if an UpLink (UL) scheduling for scheduling an allocation order of UL resources is performed prior to a DownLink (DL) scheduling for scheduling an allocation order of DL resources, setting a size α representing a size in which a DL burst region is maximally allocated in a DL sub frame, for, if the DL scheduling is performed prior to the UL scheduling, setting a size β representing a size in which the DL burst region is maximally allocated in the DL sub frame, for determining whether to discard a DL Medium Access Control (MAC) management message to be transmitted by using the size β, and for, if it is not determined to discard the DL MAC management message, determining a priority of a DL scheduling and a UL scheduling by using the size α and first performing one of the DL scheduling and the UL scheduling in accordance with the determined priority.
摘要:
An image display apparatus which includes at least one light source to generate and radiate a light beam, a color separating unit to separate the light beam emitted from the light source into a plurality of color light beams and make at least one of the separated color light beams and the other color light have different polarizations. Further, a plurality of light valves are used to form an image by controlling at least one of the color light beams separated by the color separating unit and emitted therefrom, in the unit of pixel according to input image signals. Additionally, an image combiner is used to combine images generated by the light valves.
摘要:
A beacon to measure a distance based on a time difference between a transmitted light and a reflected light and to put the measured distance information into the lights, and a positioning system to detect a position of a moving body using the beacon, and a method thereof. Since a relative position of the moving body with respect to the beacon is precisely detected and infrared laser having directionality is used as a light source, the moving body can travel in a wide working area.
摘要:
A projection system that can adjust color balance of incident light is provided. The projection system includes a light source, a spatial filter, an optical separator, a scrolling unit, a light valve, and a projecting lens unit. The spatial filter has a slit to adjust a divergent angle or etendue of light emitted from the light source. The optical separator separates light passing through the spatial filter according to color of incident light. The scrolling unit has one or more spiral lens discs, which are formed by spirally arranging cylindrical lens cells, rotate, and scroll color beams separated by the optical separator. The light valve processes light passing through the scrolling unit according to an image signal and forms an image. The projecting lens unit magnifies the image formed on the light valve and projects the magnified image onto a screen.
摘要:
A projection system and a method of forming a color image are provided. A projection system includes a light source, a color splitter which splits light emitted from the light source into colors according to a plurality of wavelength ranges, a scrolling unit which scrolls the colors split by the color splitter, a polarization converter which converts the light emitted from the light source into light having a first polarization, a color selector which converts at least some of the light having the first polarization into light having a second polarization different from the first polarization, an image combiner which transmits or reflects light transmitted by the color selector according to a polarization direction, and at least two light valves each of which receives light transmitted by the image combiner and processes the received light according to an image signal to form an image.
摘要:
An optical combining device for combining the paths of two light beams having different polarizations is provided. The device includes a scroll direction change prism and a polarized beam splitter. The scroll direction change prism is disposed in the path of a first light beam and changes a scroll direction of the first light beam to as to be the same as that of a second light beam. The polarized beam splitter is disposed in the path of both the first light beam, reflected from the scroll direction change prism, and the second light beam and combines the first and second beams by selectively transmitting or reflecting them according to the polarization direction thereof.
摘要:
An illumination system designed to remove laser speckle and a projection system including the same. The illumination system includes a laser light source having at least one laser, a diffractive optical element to divide a laser beam emitted from the laser light source into a plurality of sub-beams and to periodically move in such a way as to temporally average the speckle of the laser beam, and an optical fiber bundle including a plurality of fibers with the same length to divide the sub-beams into smaller sub-beams. The illumination system divides the laser beam emitted from the laser light source into sub-beams and temporally or spatially averages the sub-beams, thereby effectively reducing or removing laser speckle. The projection system employing the illumination system can provide improved image quality.
摘要:
A projection system that can adjust color balance of incident light is provided. The projection system includes a light source, a spatial filter, an optical separator, a scrolling unit, a light valve, and a projecting lens unit. The spatial filter has a slit to adjust a divergent angle or etendue of light emitted from the light source. The optical separator separates light passing through the spatial filter according to color of incident light. The scrolling unit has one or more spiral lens discs, which are formed by spirally arranging cylindrical lens cells, rotate, and scroll color beams separated by the optical separator. The light valve processes light passing through the scrolling unit according to an image signal and forms an image. The projecting lens unit magnifies the image formed on the light valve and projects the magnified image onto a screen.
摘要:
A highly efficient projection system and a color scrolling method are provided. In the color scrolling method, first, an optical splitter splits a beam emitted from a light source into individual color beams. Next, a rectangular light valve is disposed such that its long axis is along the direction into which the optical splitter splits the beam. Thereafter, the individual color beams are scrolled in the long axial direction of the light valve. The color scrolling in the long axial direction can increase light efficiency much more than a color scrolling performed in a short axial direction.