baber/WOPTO huggingface dataset:
Patent KR-20130016695-A (KR)
Title: Manufacturing method of vacuum door equipped with honeycomb structure
Inventor: LEE KYUNG EUN
IPC: E04C2/36
Filed: 2011-08-08
Abstract: PURPOSE: A vacuum door with a honeycomb member and manufacturing method is provided to improve insulation capability and soundproof capability of a door used as a construction material and to improve suitability as the construction material by fully increasing a period in which a vacuum state is maintained. CONSTITUTION: A vacuum door with a honeycomb member and manufacturing method comprises a first door panel, a second door panel, a honeycomb member(30), an adhesive resin layer(40), a thiokol coating layer(50), and a side finishing material(60). The first door panel and the second door panel include same size. The honeycomb member is installed in the inside of the first door panel and the second door panel and is vacuumized. The adhesive resin layer is generated by coating an adhesive resin in space between the first door panel and the second door panel along the outside of the honeycomb member. The Thiokol coating layer is generated by coating a Thiokol at the outside of the adhesive resin layer. The side finishing material is adhered to the outside of the Thiokol layer and to the up down left right side of the first door panel and the second door panel.
Patent KR-20130017709-A (KR)
Title: Base station and virtual base station system for controllling connection of data offloading
Inventor: LEE KI HO
IPC: H04L29/06
Filed: 2011-08-11
Abstract: PURPOSE: A base station device and a virtualization base station system are provided to offer an effective data transmission environment to a terminal by directly transmitting the data of a specific subscriber to a data network. CONSTITUTION: A local breakout service unit(107) directly connects to an internet network. The local breakout service unit provides a local breakout service which transmits data to the Internet network. A determination unit(105) determines the subscriber identification information of a call setup target. The determination unit determines the provision of a local breakout service. A storage unit(104) stores a local breakout service target as the subscriber identification information. [Reference numerals] (101) Call connecting unit; (103) Storage unit; (105) Determination unit; (107) Local breakout service unit; (109) Data service unit
Patent KR-20130019213-A (KR)
Title: Humidifier
Inventor: KIM KYEONG BO
IPC: F24F6/06
Filed: 2011-08-16
Abstract: PURPOSE: A humidifier is provided to enable a user to easily assemble the humidifier including a disc assembly. CONSTITUTION: A humidifier comprises a water tank, a tray, a rotary shaft(430), a multiple discs(410), and a disc cover(440). The tray comprises a storage chamber which is supplied water from the water tank and stores the water. The rotary shaft is rotatably installed in the tray. A plurality of discs is installed on the rotary shaft. The disc cover is installed in the end of a plurality of discs and generates hole in order to insert the rotary shaft. The disc cover includes a locking bar passing through the hole, and an insertion part is included in order to insert the looking bar in the end of the rotary shaft.
Patent KR-20130019642-A (KR)
Inventor: RYU WOONG SEON
IPC: H02K1/12
Filed: 2011-08-17
Abstract: 본 발명에 의한 스테이터 코어는 스테이터 코어의 중심축에 수직한 단면이 "T"자 형상으로 마련되며, 요크(yoke)를 구성하는 내주면과 외주면이 스테이터 코어 중심에 대해 원호를 형성하고, 상기 내주면으로부터 상기 중심을 향해 돌출 형성되어 코일이 권선되는 치(tooth)를 가지는 분할 코어; 상기 요크의 일측 단부에 형성되는 돌기부; 및 상기 요크의 타측 단부에 상기 돌기부와 상보적인 형상으로 마련되어, 인접한 다른 분할 코어의 돌기부와 맞물리는 홈부;를 포함하며, 상기 돌기부는 상기 홈 부와 적어도 1개의 접점을 가지는 부등호(>) 형상으로 마련되어, 상기 복수 개의 분할 코어의 돌기부 및 홈부의 맞물림 결합에 의해 원통형상으로 조립되는 것이 바람직하다.
Patent KR-20120096954-A (KR)
Title: Dual image sensor image processing system and method
Inventor: COTE GUY
IPC: H04N5/347
Filed: 2011-08-18
Abstract: PURPOSE: A dual image sensor image processing system and method thereof are provided to reduce realization costs for the whole of hardware by gradually processing images in function blocks. CONSTITUTION: A front-end pixel processing unit(80) processes image data received from a first image sensor(90a) and a second image sensor(90b). When the first image sensor or the second image sensor is activated, a front-end control unit(84) executes front-end processing logic in a single sensor mode. When the first image sensor and the second image sensor are activated, the front-end control unit executes the front-end processing logic in a dual sensor mode.
Patent KR-20130021749-A (KR)
Title: 쌀 찐빵의 제조 방법
Inventor: CHOE DAE IL
IPC: A23L7/104
Filed: 2011-08-23
Abstract: 본 발명은 글루텐 무(無) 첨가한 쌀 찐빵의 제조 방법에 관한 것으로서, 쌀가루와 밀가루의 전체 중량을 기준으로 쌀가루 20중량%~70중량% 밀가루 80중량%~30중량%, 과 전분(옥수수전분, 고구마전분, 타피오카전분)을 첨가한 쌀 찐빵의 제조 방법에 관한 것이다. 
상기와 같은 목적을 달성하기 위하여 본 발명은 배합 통에 물. 쌀가루·밀가루. 정백. 제염. 타피오카 전분 또는 옥수수 전분·고구마 전분·이스트를 넣고 저속으로 2분간 믹싱을 한 후 식물성 팜유를 투입하고 중속에서 3~ 4 분간 믹싱 하는 단계에서 반죽이 된 생지를 50~65g중량으로 분할하는 과정과. 그 속에 팥, 안 금을 넣어 찐빵모양을 만들어 20~30분간 발효를 시키는 단계와 찜 솥에 13~15 분간 스팀으로 쪄내는 단계로 이루어진 글루텐 무(無) 첨가한 쌀 찐빵 제조방법.
Patent KR-20130022122-A (KR)
Title: A lighting device and a method of controlling a light emitted thereof
Inventor: KIM NAM JIN
IPC: H05B37/02
Filed: 2011-08-25
Abstract: PURPOSE: A lighting device and a method for controlling light irradiated from the lighting device are provided to improve dimming performance by preventing the reversing of a light flux due to input voltage. CONSTITUTION: A rectifying circuit supplies rectified AC voltage to each light emitting part. A control part controls on and off states of the each light emitting part according to input voltage. The light emitting part is turned on and off according to the control of the control part. A first light emitting part(440) and a third light emitting part(460) are connected in parallel. The first light emitting part and the second light emitting part are connected in series.
Patent KR-20130022872-A (KR)
Title: Semiconductor device with air gap spacer and method for manufacturing the same
Inventor: YEOM SEUNG JIN
IPC: H01L27/108
Filed: 2011-08-26
Abstract: PURPOSE: A semiconductor device including an air gap spacer and a manufacturing method thereof are provided to reduce parasitic capacitance between a bit line and a storage node contact plug by forming an air gap between the bit line and the storage node contact plug. CONSTITUTION: A device isolation layer(22) is formed on a semiconductor substrate(21). A plurality of active regions(23) include a bit line contact region and a storage node contact region. A storage node contact plug(29A,29B) is formed on the storage node contact region. A bit line(36) separates the storage node contact plug. An air gap(38) and a bit line spacer(35) are formed between the bit line and the storage node contact plug. A bit line hard mask layer(37) is formed on the bit line.
Patent KR-20130023003-A (KR)
Title: Battery charge circuit
Inventor: HWANG KYU MIN
IPC: H02J7/02
Filed: 2011-08-29
Abstract: PURPOSE: A battery charge circuit is provided to improve the efficiency of a battery and to selectively change a battery. CONSTITUTION: A charging power unit(20) generates outer alternating current(10) and inner direct current(Vdc). The charging power unit includes a transformer(21) and a rectifier(22). A charging unit(100) measures the voltage level of a battery and outputs a measurement signal(Vdet<1:4>). The charge unit selectively charges the battery in response to a charging control signal(CTRL<1:7>). A control unit(30) generates a charge control signal in response to the measurement signal. The control unit includes a MCU(Micro Controller Unit). [Reference numerals] (100) Charging unit; (20) Charging power unit; (21) Transformer; (22) Rectifier; (30) Control unit
Patent KR-20130026728-A (KR)
Title: Spindle motor
Inventor: HAN CHEONG UN
IPC: G11B19/20
Filed: 2011-09-06
Abstract: PURPOSE: A spindle motor is provided to increase lifetime of a bearing by smoothly collecting oil between a bearing and an oil stopper. CONSTITUTION: A bearing assembly(200) includes a bearing housing accommodating a bearing. A stator(20) includes a core combined with a bearing housing and a wound coil to a core. A rotor(30) is combined with a rotary shaft rotatably supported to a bearing. The rotor includes a magnet facing a core. In an oil stopper(300), a penetration hole in which the rotary shaft passes is formed. A chamfer unit is formed in an edge formed by the inner surface of the bearing and the upper surface of the bearing.
Patent KR-20120026455-A (KR)
Title: 연마 장치
Inventor: WATANABE KATSUHIDE
IPC: H01L21/304
Filed: 2011-09-08
Abstract: 연마 장치는, 연마 테이블을 회전시키는 테이블 회전 모터와, 톱링을 회전시키는 톱링 회전 모터와, 연마 패드를 드레싱하는 드레서와, 연마 패드의 높이를 측정하는 패드 높이 측정기와, 연마 패드의 높이로부터 연마 패드의 감모량을 산출하고, 연마 패드의 감모량과, 테이블 회전 모터의 토크 또는 전류와, 톱링 회전 모터의 토크 또는 전류에 기초하여 연마 패드(22)의 수명을 결정하는 진단부를 구비한다.
Patent KR-20120029328-A (KR)
Title: Non-aqueous oily injectable formulation exhibiting preservative efficacy
Inventor: SO JIN EON
IPC: A61K9/107
Filed: 2011-09-08
Abstract: PURPOSE: An oily injectable formulation is provided to prevent phase separation and to ensure safety and high antiseptic ability. CONSTITUTION: An injectable formulation contains: phamacologically effective amount of active ingredients; oil containing active ingredients; hydrophilic excipient without phase separation in oil; and an oil affinity antiseptic has high antiseptic ability by binding with the hydrophilic excipient. The active ingredient is protein, peptide drug, and hyalronic acid, inorganic salt thereof. The concentration of the oil affinity antiseptic is 0.01-20% (%(w/v)).
Patent KR-20130030018-A (KR)
Title: A traction apparatus for the cervical vertebrae
Inventor: PARK SANG IL
IPC: A61F5/04
Filed: 2011-09-16
Abstract: PURPOSE: A traction apparatus for a patient with ruptured cervical disk is provided to enable a user to easy wearing through a control unit. CONSTITUTION: A traction apparatus comprises: support parts(15-1, 15-2) which supports a boundary of jaw and neck and a boundary of neck and back of the head; a support part(10) placed on a shoulder part; extension devices(12-1, 12-2) which pushes up the support part; an extension device fixing part(11-1,11-2) which fixes the extension device on one side of the support; a connector(16) which helps movement of the extension device; a device for supplying air by manipulation; a device for discharging air; and an air line(17) for supplying and discharging air.
Patent KR-20130030042-A (KR)
Title: Acryl-based copolymers for an optical film, and an optical film comprising the same
Inventor: SUNG DA EUN
IPC: C08F220/10
Filed: 2011-09-16
Abstract: PURPOSE: An acrylic copolymer for an optical film is provided to have excellent heat resistance by having a glass transition temperature of 100 deg. C. or higher, and to provide an optical film which is suitable for manufacturing a phase difference compensation film. CONSTITUTION: An acrylic copolymer for an optical film comprises 10-60 parts by weight of an alkyl(meth)acrylate unit; 20-50 parts by weight of a 2-phenoxyethyl acrylate unit; and 1-40 parts by weight of one or more selected from a (meth)acrylic acid unit and a tert-butyl (meth)acrylate unit. The acrylic copolymer has a glass transition temperature of 100-500 deg. C. and a weight average molecular weight of 50,000-500,000. The optical film comprises the acrylic copolymer.
Patent KR-20130035462-A (KR)
Title: Drainage of the urinal
Inventor: SONG TAE GWANG
IPC: E03D13/00
Filed: 2011-09-30
Abstract: PURPOSE: A drain device of a urinal is provided to drain urine and washing water by vertically moving a float cap according to a water lever of the washing water. CONSTITUTION: A drain device(100) of a urinal comprises a drainage member(110), a float cap(120), and a connection member(130). The drainage member is mounted on an installation hole of a toilet bowl and comprises a drainpipe(113) to drain urine and washing water. The float cap is connected to the drainpipe and drains the urine and the washing water. The float cap closes the drainpipe by descending according to the water level of the residual water and blocks the bad smell flowing backwards. The connection member fixes the drainage member mounted on the installation hole.
Patent KR-20120085176-A (KR)
Title: Coil component
Inventor: OGAWA HIDEKI
IPC: H01F1/24
Filed: 2011-10-13
Abstract: PURPOSE: A coil component is provided to fix a height thereof by receiving a conductive wire of a coil in the coil component. CONSTITUTION: A magnetic core(11) includes a sheet part and a pillar part. A pair of first conductive films(12,13) are formed from the lateral side to the lower side of the sheet part of the magnetic core. A conductive wire with a rectangular shape is spirally wound around a spiral unit. A coil(14) is contacted with the lateral surface of the first conductive film. A magnetic sheath(15) covers the top of the pillar part and the lateral side of the sheet part of the magnetic core, the lateral surface of the first conductive film, and the spiral unit. A pair of second conductive films(16,17) cover the lower sides of a pair of the first conductive films. A pair of third conductive films(18,19) cover the surfaces of the second conducive films.
Patent KR-20130041700-A (KR)
Title: An ice bucket for unlaying ice curdling
Inventor: KIM YONG HYUN
IPC: F25D11/00
Filed: 2011-10-17
Abstract: PURPOSE: An ice bucket for unlaying tangled ice and a refrigerant equipping the same are provided to unlay arch-shaped ice cubes in a tangle for preventing the malfunction of an ice cube ejecting member. CONSTITUTION: An ice bucket for unlaying tangled ice comprises a container body(100), an ice cube ejecting member(200), and a tangled ice cubes unlaying member(300). The ice cube ejecting member comprises a motor shaft(220) and a blade installation shaft. The ice cube ejecting member is radially protruded from the blade installation shaft, is equipped with a plurality of blades which is separately arranged along the circumferential direction, and is rotatably arranged at one side of the container body. The tangled ice cubes unlaying member prevents ice cubes from being tangled and frozen in the upper part of the ice cube ejecting member.
Patent KR-20130042183-A (KR)
Title: Apparatus, method, and recording media for processing input event
Inventor: PARK KYUNG DONG
IPC: G06F3/01
Filed: 2011-10-18
Abstract: PURPOSE: A device for processing an input event, a method thereof, and a recording medium thereof are provided to manufacture a UI component operated in a method desired by people not having a development career by intuitively defining the operation of the UI component and easing the operation modification of the UI component. CONSTITUTION: A storage unit(110) includes an attribute table matched with an attribute value about state attributes and an input sensing unit(120) senses an input event. A state determining unit(130) determines the next input state by considering a current input state and the input event. An attribute extracting unit(140) refers to the attribute table to extract the attribute value about an attribute corresponding to the next input state. A screen processing unit(150) processes a screen corresponding to the input event according to the attribute value. The storage unit includes a state switching table regulating the next input state according to the input event. [Reference numerals] (110) Storage unit; (120) Input sensing unit; (130) State determining unit; (140) Attribute extracting unit; (150) Screen processing unit; (160) Component generating unit;
Patent KR-20130046215-A (KR)
Title: A swimming assistant apparatus worn on body
Inventor: LEE SUNG JONG
IPC: A63B35/00
Filed: 2011-10-27
Abstract: PURPOSE: A body-wearing type swimming assist device is provided to enable a user to enjoy swimming through the operation of an on/off working operation switch as well as to be applied to water sports through the use of a propeller. CONSTITUTION: A body-wearing type swimming assist device includes the following parts: a body frame(10) put on the body of a user; a water-jet propeller(20) fixed to the body frame and generating propulsion by shooting water; a battery(30) connected with the water-jet propeller and supplying power; a controller(40) controlling the operation of the water-jet propeller; and a buoyancy component(50) fixed to the body frame. The buoyancy component has buoyancy above neutral buoyancy. The body frame has a bottom surface touching the back or stomach of the user, and the water-jet propeller and the battery are placed at the upper side of the bottom surface. [Reference numerals] (20) Water-jet propeller; (30) Battery; (40) Controller; (50) Buoyancy component
Patent KR-20130047040-A (KR)
Title: Composition for skin whitening containing chelidonium majus extracts and trihydroxyisoflavones
Inventor: PARK JUN SEONG
IPC: A61K31/352
Filed: 2011-10-31
Abstract: PURPOSE: A composition containing a Chelidonium majus extract and trihydroxy isoflavone for skin whitening is provided to maintain skin safety and excellent whitening effect and to suppress skin cell apoptosis and melanogenesis. CONSTITUTION: A composition for skin whitening contains 0.0001-10 wt% of a Chelidonium majus extract and 0.001-10wt% of trihydroxy isoflavone as active ingredients. The trihydroxy isoflavone is 3',4'7-trihdyroxy isoflavone. Trihydroxy isoflavone is derived from daidzin or daidzein contained in Leguminosae.
Patent KR-20120048495-A (KR)
Title: Portable hyperthermo-therapeutic apparatus
Inventor: LEE HEA SUNG
IPC: A61F7/00
Filed: 2011-11-02
Abstract: PURPOSE: A portable thermotherapy device is provided to enable a user to take out parts thereof or to keep the parts inside the device. CONSTITUTION: A portable thermotherapy device comprises a body part(110) and a parts receiving part(120). In the body part, an empty space capable of receiving external parts is formed in the rear thereof. The parts receiving part receives external parts for thermal treatments. The body part and parts receiving part are detachably combined with each other. The parts receiving part comprises a front panel(121), a rear panel(122), a left panel(123), a right panel(124), and a bottom panel(125).
Patent KR-20130051652-A (KR)
Title: Escaping rope ladder and top down type fire escaping apparatus having the same
Inventor: KIM HAN GI
IPC: E06C9/08
Filed: 2011-11-10
Abstract: PURPOSE: A fire escape device for equipping an escaping rope ladder is provided to ensure excellent operation reliability and stability and to lower a production cost by simplifying a structure. CONSTITUTION: An escaping rope ladder comprises a plurality of footstools(22) and a movable footstool spacer member(28). The footstools are movably fitted to two ropes(18,20) which are wound or unwound on the bobbins(14,16) of an operation shaft(12) in the longitudinal direction. The movable footstool spacer member comprises a pair of links(24,26) and is connected to both ends of the footstools.
Patent KR-20130053690-A (KR)
Title: 한글을 이용한 음성 인식 시스템
Inventor: CHOI SEONG HWAN
IPC: G10L15/26
Filed: 2011-11-16
Abstract: 본 발명은 한글을 이용한 음성 인식 시스템에 관한 것으로서, 특히  사용자의 음성신호가 입력되는 오디오부와, 상기 오디오부에서 입력되는 사용자 음성에서 잡음을 제거하여 음성 신호만 추출하는 잡음제거부와, 상기 잡음제거부에서 전달되는 음성 신호에서 발음 정보를 분석하여,  한글을 기반으로 발음되는 최소 소리 단위로 검출하는 음성 인식 엔진부와, 상기 음성 인식 엔진부에서 검출 된 최소 소리 단위를 기반으로 소리를 표기하는 표음 문자를 생성하는 문자 생성부와, 사용자의 선택에 따라 , 상기 문자 생성부에서 생성된 표음 문자를 통해 음성 명령을 실행하거나, 모니터 또는 스피커를 통해 출력 하도록 제반 제어 기능을 수행하는 제어부로 이루어진 것을 특징으로 한다. 
따라서, 본 발명은 한글에서 기본 자음과 기본 모음을 추출하여 소리 법칙을 설정하고, 이 소리 법칙에 따라 사용자 음성을 표음 문자로  변환하는 음성 인식 엔진 기능을 실행함으로써 간단하게 사용자 음성의 문자 변환이 가능할 뿐만 아니라, 음 성 인식 엔진 기능을 컴퓨터, 통신 기기 등의 각종 멀티미디어 기기에 적용하여 음성만으로 시스템 구동, 문자 전송, 음성 메일 전송 등의 사용자 편의 기능이 실행될 수 있다.
Patent KR-20130055851-A (KR)
Title: Lighting apparatus of solar-light for limiting transfer heat and protecting right to sunshine
Inventor: LEE CHAN BONG
IPC: F21S11/00
Filed: 2011-11-21
Abstract: PURPOSE: A natural-lighting device is provided to protect the right to sunshine of lower floor residents by eliminating a blind spot, where sunlight is not cast, in an area crowded with buildings. CONSTITUTION: A natural-lighting device includes a supporting stand(10), a driving unit(40), a first light guiding unit(20), a second light guiding unit(50), and a UV-IR(Ultraviolet-Infrared) shield layer(30). One or more of the supporting stand are installed at a structure or an area and enables the first light guiding unit and the second light guiding unit to be installed at a location separated from the surface of the structure, etc. The driving unit is installed at the supporting stand and controls the range of sunlight projection. The first light guiding unit is installed at the driving unit and reflects or refracts sunlight supplied from the sun to a sunlight blind spot. The UV-IR shield layer is formed on the surface of the first light guiding unit and blocks ultraviolet and infrared rays among the sunlight incident on the first light guiding unit. The second light guiding unit is installed at the driving unit and reflects or refracts sunlight supplied from the sun to the sunlight blind spot.
Patent KR-20130056692-A (KR)
Title: Height adjusting apparatus for modules of temperature sensor in gas range
Inventor: KIM YONG HO
IPC: F24C3/12
Filed: 2011-11-22
Abstract: PURPOSE: A height control device of a gas range temperature sensor module is provided to obtain reliability on a detected signal through a temperature sensor by preventing operation of a flowing unit and flowage of the temperature sensor from being stopped. CONSTITUTION: A height control device of a gas range temperature sensor module comprises a shaft(2), a holer(3), a spring(4), a heat collecting plate(5), a temperature sensor(6), and a height control unit(8). The holder comprises a spring storage unit(32) and a rotation prevention unit(31) for preventing twisting of a signal line of the temperature sensor. The heat collecting plate and the temperature sensor elastically come into contact with a bottom surface of a cooking container. The temperature sensor is attached to the inside of the heat collecting plate and coverts temperature of the cooking container into an electrical signal. A length of the shaft is longer than the initial length, and a diameter of shaft is different from the initial diameter in order to divide upper and lower shafts. The height control unit is formed in a mutual connection unit of the upper and lower shafts.
Patent KR-20130058319-A (KR)
Title: Eco-friendly light weight radial tire for vehicle
Inventor: LEE JI WAN
IPC: D02G3/48
Filed: 2011-11-25
Abstract: PURPOSE: A lightweight environment-friendly radial tire for a vehicle is provided to reduce rotational resistance and to improve fuel efficiency. CONSTITUTION: A lightweight environment-friendly radial tire for a vehicle is formed by braiding a high-strength textile cord such as aramid. In case of a bead wire, an aramid cord of a conditioned size of 2,000 deniers or greater is applied to the bead wire and a belt portion of a tire and replaced. [Reference numerals] (AA) Roll a textile cord; (BB) Slit the rolled material to be thin; (CC) Braid the slit rolled material into a cylindrical shape; (DD) Cut the braided material in a cylindrical shape amounting to the size of a tire to fit the width of the tire; (EE) Manufacture the tire with the cut braided material as a belt layer
Patent KR-20130059204-A (KR)
Title: 근거리 네트워크 디바이스 연결장치 및 방법
Inventor: KIM YOUNG HAN
IPC: H04W88/02
Filed: 2011-11-28
Abstract: 근거리 네트워크에서의 디바이스 연결장치 및 방법이 개시된다. 본 발명의 연결방법은, 근거리 네트워크에 접속하고, 근거리 네트워크에 접속하는 디바이스부터 디바이스 정보를 수신하여, 촬영부가 촬영하는 영상에 근거리 네트워크에 접속하는 디바이스가 위치하는 경우, 상기 디바이스 정보를 소정 형식으로 디스플레이한다. 본 발명에 의하면, 손쉬운 근거리 네트워크 디바이스간 연결을 제공한다.
Patent KR-20130060575-A (KR)
Title: Hollow backlight
Inventor: CHOI WON
IPC: G02F1/13357
Filed: 2011-11-30
Abstract: PURPOSE: A hollow backlight is provided to maintain the minimum brightness over 70% of maximum brightness of an output facet. CONSTITUTION: Optical sheets(40,50,60) and a reflector sheet(30) are arranged to form a hollow cavity(10). A light emitting diode(20) is comprised between the optical sheet and one end of the reflector sheet. A light distribution of the light emitting diode is equal to or less than 30°. The optical sheet includes a prism type optical sheet(40) whose apical angle is 100 to 130°.