Abstract:
PURPOSE: A prism sheet and a liquid crystal display device using the same are provided to improve the vertical incidence to a liquid crystal display panel by condensing light, and realize uniform distribution of brightness. CONSTITUTION: A liquid crystal display panel displays an image. A lamp emits light. A light guide plate is arranged at the rear of the liquid crystal display panel for radiating the light towards the liquid crystal display panel. An optical sheet layer is interposed between the liquid crystal display panel and the light guide plate. The optical sheet layer includes a plurality of prism sheets having a plurality of prism convexes formed in parallel in a predetermined pitch. A V-shaped groove(46a) is formed at the top of each prism convex(46) of a first prism sheet(36) in association with a longitudinal direction of the prism convex.
Abstract:
PURPOSE: An LCD(Liquid Crystal Display) is provided to enhance the display quality by emitting the heat of the inside of the LCD. CONSTITUTION: The LCD(500) comprises a display unit(100) for displaying an image, a backlight assembly(200) for providing light to the display unit(100), a mold frame(300) for receiving the display unit(100) and a top chassis(400). The backlight assembly(200) comprises a lamp unit(230) generating the first light for displaying the image, a diffusion plate(240) for changing the first light into the second light with a uniform luminance distribution, a reflective plate(250) for reflecting light leaked from the lamp unit(230) into the diffusion plate(240), cooling members(260a,260b) for emitting the heat generated by the lamp unit(230) to the outside, and a bottom chassis(270).
Abstract:
PURPOSE: A lamp fixing holder and a back light assembly having the same are provided to realize a display of the high quality by maximizing the use efficiency of light generated in a lamp. CONSTITUTION: A lamp fixing holder(100) includes a lamp fixing body(110) and a fixing member(120). The lamp fixing body restraints a lamp(130) from moving while minimizing loss of light generated from the lamp. The lamp fixing body is roundly formed to be inserted into a part of a cylindrical surface of the lamp. The fixing member fixes the lamp fixing body at a container(200) containing the lamp to face a part of the lamp which is not hidden by the lamp fixing body with the liquid crystal display panel.
Abstract:
PURPOSE: A direct type liquid crystal display device is provided to prevent the generation of Becke's line on a screen by forming a Becke's line preventing pattern on a diffusion sheet and the discoloring of the Becke's line preventing pattern by ultraviolet rays and visible rays included in the light of a lamp and the heat of the lamp by mounting a diffusion plate between the sheet and the lamp. CONSTITUTION: A direct type liquid crystal display device includes a diffusion sheet(242) having an incident surface to which light provided from a lamp is incident. The incident surface of the diffusion sheet is formed with a Becke's line preventing pattern(242a) for blocking the Becke's line caused by the light of the lamp. The pattern is formed at a position corresponding to the position of the lamp. Beads or a binder(242b) is further coated on a projecting surface of the diffusion sheet to project the incident light to a liquid crystal panel.
Abstract:
PURPOSE: An apparatus for constructing a home-zone database for home-zone service is provided to offer an apparatus for constructing a home-zone database in order to exactly embody home-zone service. CONSTITUTION: A cell plan processor(100) consists of a cell plan tool(110) and a conversion part(120). The cell plan tool(110) generates a coverage map to determine coverage by base stations. The conversion part(120) generates zone data using the coverage map. A home location register(400) stores subscriber information, such as terminal information, extrinsic information, etc. A location determination part(200) is composed of an address location database(210) and a zone database(220). The address location database(210) is transferred mobile identification numbers and national significant numbers from a CCC(Customer Care Center). The zone database(220) receives national significant numbers and RTD(Round Trip Delay) information from a base station transceiver subsystem. Also the zone database(220) stores home-zone data for each subscriber, based on latitude and longitude information provided from the address location database(210). An SPC(Service Provisioning Center)(300) transfers the home-zone data provided from the location determination part(200) to the home location register(400).
Abstract:
PURPOSE: A method for establishing more base stations for cell expansion in a cellular system is provided to establish new base stations in view of location of base stations and height of antennas CONSTITUTION: A ratio of a distance between a new base station and the nearest circumferential base station to that between a new base station and the farthest circumferential base station is within 1:2. And, when the new base station(6) is not located on the middle place between circumferential base stations and the ratio of the distance is 1:2, a ratio of a height of an antenna of the circumferential base station to that of the new base station(6) is within 8:5. Therefore, the new base station is established on a place in which interference between signals from the new base station and the circumferential base station is smallest.
Abstract:
본 발명에 의한 코드 분할 다중 접속 네트워크의 역방향 링크 최적화 방법은 링크 평형화 방법과 병행으로 실시할 수 있는 역방향 링크에 대한 최적화 시험 방법에 관한 것이다. 본 발명은, 선정된 시험 장소에서 수집된 통화 데이터중 단말 송신 전력 데이터와 단말 송신 이득 조정 데이터, 역방향 프레임 에러율 데이터 및 잡음대 비트 에너지 결정점 데이터를 분석하여, 각 데이터가 미리 정의되어 있는 지정범위를 만족시키지 않는 경우 순방향 서비스 범위를 축소하거나 또는 잡음대 비트 에너지 결정점 파라미터를 조정한다. 상기와 같은 과정을 통해 각 링크의 적정 서비스 영역을 유지시켜 통화 품질을 개선시키고 전체적인 시스템 성능을 최적의 상태로 유지한다.
Abstract:
본 발명은 특정 시스템의 송신 주파수가 타 시스템의 수신 주파수와 인접되어 있어서, 송신 주파수의 불요파 성분이 기존망에 간섭으로 작용하는 경우의 안테나 배치방법에 관한 것이다. 본 발명에 의한 인접 주파수간 간섭시 안테나 설치 방법의 바람직한 일 실시예는, 송수신 안테나가 같은 공간에 설치되어야 할 때, 일반적 형태의 송신 안테나와 수신 안테나를 서로 수직으로 이격시켜 설치한다. 본 발명의 다른 실시예는, 송수신 안테나가 같은 공간에 설치되어야 할 때, 수신 안테나가 섹터 형태로 설치되어 있을 경우, 송신 안테나의 방향을 수신안테나들의 방향각 사이가 중심방향이 되도록 설치하는 것이 바람직하다. 본 발명은, 송신 신호의 불요파 성분에 의한 간섭신호를 크게 줄이는 효과를 갖는다.