baber/WOPTO huggingface dataset:
Patent KR-20140049790-A (KR)
Title: Electrochromic device and window including the same
Inventor: KIM JOONG BAE
IPC: G02F1/15
Filed: 2012-10-18
Abstract: The present invention relates to an electrochromic device and a window containing the same. The electrochromic device comprises: a transparent first electrically conductive layer; a first UV and IR barrier layer formed on the first electrically conductive layer; a counter electrode formed on the first UV and IR barrier layer; an ion conductive electrolyte layer formed on the counter electrode; an electrochromic material layer formed on the ion conductive electrolyte layer; a second UV and IR barrier layer formed on the electrochromic material layer; and a transparent second electrically conductive layer formed on the second UV and IR barrier layer.
Patent KR-20130044165-A (KR)
Title: Contact terminal for a probe card, and the probe card
Inventor: HOSHINO TOMOHISA
IPC: H01L21/66
Filed: 2012-10-19
Abstract: PURPOSE: A contact terminal for a probe card, and the probe card are provided to prevent the abrasion of the central part of outer housing and the deformation of a contact part. CONSTITUTION: A pogo pin is arranged on a surface facing a semiconductor device. The plunger of the pogo pin has a pillar-shaped contact part(14c). The contact part has outer housing(14e) for covering a central part(14d) and a pillar-shaped central part. The central part and the outer housing are made of different materials. The hardness and the resistivity of an outer housing material are different from those of a central part material.
Patent KR-20140051670-A (KR)
Inventor: YOON GIL SANG
IPC: H01L33/48
Filed: 2012-10-23
Abstract: A tray for manufacturing a fluorescent layer according to the present invention comprises a body having a predetermined thickness and at least one receiving groove which is able to receive a fluorescent material on a top surface thereof and having a depth less than the thickness of the body. A method of manufacturing a light emitting diode package by using the tray includes the following steps of: mounting a light emitting diode chip on a substrate; providing a fluorescent material in the receiving groove of the tray for manufacturing the fluorescent layer which includes the body having the predetermined thickness and the at least one receiving groove which is able to receive the fluorescent material on the top surface thereof and having the depth less than the thickness of the body; hardening the fluorescent material; separating the hardened fluorescent material from the tray for manufacturing the fluorescent layer; and forming the fluorescent layer by mounting the separated fluorescent material on the light emitting diode chip.
Patent KR-20130047617-A (KR)
Title: Organic thin film transistor of having micro-structure
Inventor: KIM JAE HOON
IPC: H01L51/05
Filed: 2012-10-26
Abstract: PURPOSE: An organic thin film transistor having a microstructure is provided to form the microstructure in a specific region or the whole region of the lower part of an active layer and to improve the injection of the electric charges from a source region to a channel region. CONSTITUTION: A gate electrode(110) is formed on a substrate(100). A gate insulating layer(120) is formed on the gate electrode. An active induction layer(130) is formed on the gate electrode. An active layer(140) is formed on the active induction layer. A source electrode(150) and a drain electrode(160) are formed on the active layer. [Reference numerals] (AA) Second direction; (BB) First direction
Patent KR-20140055199-A (KR)
Title: 조명 설치구조
Inventor: KANG KI WON
IPC: F21V17/10
Filed: 2012-10-30
Abstract: 본 발명에 따른 조명 설치구조는, 측방으로 길이를 갖도록 일정 높이에 설치되어, 조명을 일정 높이로 설치하기 위한 한 쌍의 지지대와, 상기 지지대들의 하단을 따라 등 간격으로 돌출 형성되며, 동일 방향을 향하도록 일측에 삽입홈이 형성되는 다수의 걸림편 및, 상기 조명에 일단이 결합되며, 상기 조명과 반대되는 타단에는 상기 걸림편들의 상기 삽입홈에 측방으로 슬라이드 삽입될 수 있도록 하나 또는 다수의 삽입편이 돌출 형성되는 한 쌍의 브라켓을 포함한다.
Patent KR-20140057012-A (KR)
Title: Air column structure
Inventor: MIN KYUNG SOO
IPC: A63B69/36
Filed: 2012-11-02
Abstract: The present invention relates to an air column structure and, more specifically, to an air column structure consisting of an air tube (2) which is swollen in a form of a circular cylinder if air is filled, and shrunk to decrease volume thereof if the air is released; a connecting bracket (3) which is configured with a cover plate (301), a connection pipe (303), and a connection plate (302); an air valve (4) which forms an air inlet (401) connected to an air injection hose (403) and is opened and closed by a lever (402); an air pressure meter (5) which measures the injected air pressure; and a safety valve (6) which maintains the air pressure at an appropriate level by discharging internal air to the outside when the air pressure exceeds the certain pressure.
Patent KR-20140058720-A (KR)
Title: Operating apparatus for vehicle
Inventor: LEE HUI SUNG
IPC: B60R25/34
Filed: 2012-11-05
Abstract: The present invention enables a user to control doors, a trunk lid, or a window by a sound or vibrations, without an additional manipulation of keys to maximize the convenience of the vehicle usage and enhance the product value of the vehicle. According to the present invention, the operating device of a vehicle includes: a sensing instrument (1) for converting a knocking of a user into an electrical signal; a controller (3) for receiving the electrical signal of the sensing instrument, compares the signal with a pre-input pattern, and drives a driving device (5) of the vehicle set on the same pattern; and more than at least one driving device (5) which is controlled and driven by the command of the controller (3).
Patent KR-20140058893-A (KR)
Title: Method of preparing nano particles having core-shell structure and nano particles prepared from the same
Inventor: KIM MI YOUNG
IPC: H01B1/16
Filed: 2012-11-07
Abstract: The present invention relates to a nanoparticle having a core-shell structure including a shell layer formed using a precursor represented by the following formula 1, and to a method for preparing the same. [Formula 1] In the formula 1, X indicates hydrogen, alkyl group having 1-6 carbons, or halogen, and n indicates an integer of 0 to 23. According to the present invention, adjustment of particle size and synthesis of core nanoparticles having a uniform shape can be possible by controlling reduction using partition equilibrium of an organic phase (nonpolar solvent) and water phase (polar solvent). Also, the present invention can adjust thickness of the shell layer by controlling reaction temperature and concentration using the shell layer forming precursor capable of controlling oxidation-reduction reaction by high solubility and partition equilibrium.
Patent KR-20140060902-A (KR)
Title: Printed circuit board and manufacturing method thereof
Inventor: AN YUN HO
IPC: H05K1/18
Filed: 2012-11-13
Abstract: The present invention relates to a printed circuit board and a manufacturing method for the same. The manufacturing method for the printed circuit board according to an embodiment of the present invention includes a step of mounting elements in inner cavities formed on an insulation board; a step of forming a first insulation layer, which has the same height as the height of the upper surface of a first element most protruding from the insulation board, on the elements; and a step of additionally forming a protection insulation layer covering the upper part of the first element on the first insulation layer.
Patent KR-20140063045-A (KR)
Title: Expression of bovine lactoferrin using transformed chlorella
Inventor: KOO JUNG MO
IPC: A23K1/16
Filed: 2012-11-16
Abstract: The present invention relates to a method for expressing a bovine-derived lactoferrin protein using micro-algae Chlorella, more specifically, inserting a lactoferrin gene optimized to a codon for Chlorella into an expression cassette including a dual CaMV35S promoter, and inserting the cassette into an expression vector to form a recombinant lactoferrin expression vector. The present invention relates to a method for expressing a recombinant lactoferrin protein by genetically modifying Chlorella by the formed expression vector. The production of a recombinant lactoferrin can be increased to use the recombinant lactoferrin for alternatives to antibiotics for an animal, when Chlorella comprising the recombinant lactoferrin expressing system is mass cultured by the present invention.
Patent KR-20140065596-A (KR)
Title: Power transmitting apparatus and image forming apparatus adopting the same
Inventor: CHOI JUNG HOON
IPC: G03G21/16
Filed: 2012-11-16
Abstract: A power transmitting apparatus according to an embodiment of the present invention includes a driving source; a driving member which is rotated by the driving source; a driven member which is interlocked with the driving member to rotate; a transmitting member which is arranged between the driving member and the driven member, is rotated by the driving member, is moved along the rotation direction of the driving member to be connected to the driven member; and an elastic member which is arranged between the transmitting member and the driven member and provides an elastic bias for the transmitting member to separate the transmitting member from the driven member.
Patent KR-20140065708-A (KR)
Title: Method for selecting and guiding merchandise based health management of people
Inventor: PARK JONG TAE
IPC: G06Q50/22
Filed: 2012-11-20
Abstract: Disclosed is a method to guide selection of an article for user health management. According to the present invention, the method includes a step of guiding a user of an article (e.g., drug or food) associated with the health status of the user (e.g., aged person or senior citizen who lives alone) based on the current location of the user. Therefore, the method of the present invention enables the user who is not familiar with the purchase of an attention-required article or the user who lacks the intelligence or physical ability to easily purchase the corresponding article in the current location where the user is located.
Patent KR-20130138075-A (KR)
Inventor: KO HEA SUN
IPC: B62H3/00
Filed: 2012-11-29
Abstract: The present invention relates to a bicycle safety deposit flower pot comprising: at least on flower pot with vegetation space; at least one bicycle storage board removably coupled with the flower pot and having wheel housing space for accepting wheels; and a locking unit binding the wheel by being arranged in the flower pot and the bicycle storage board. The flower pot and the bicycle storage board are arranged alternating with each other.
Patent KR-20140070045-A (KR)
Title: Light emitting diode and method of fabricating the same
Inventor: HAN YU DAE
IPC: H01L33/48
Filed: 2012-11-30
Abstract: Disclosed is a light emitting diode having excellent heat dissipating ability. The light emitting diode of the present invention comprises: at least one light emitting chip; a substrate which includes a lead frame electrically connected to electrodes of the light emitting chip; a lens located on the substrate to cover the light emitting chip; and oil contained in the lens and in the substrate.
Patent KR-20140070103-A (KR)
Title: flexible touch screen panel and fabrication method thereof
Inventor: KANG SUNG KU
IPC: G06F3/041
Filed: 2012-11-30
Abstract: A flexible touchscreen panel according to an embodiment of the present invention comprises: a substrate which is divided into an active area and a first and second inactive area formed on the edge of the active area; multiple first sensing electrodes which are arranged on the active area in a first direction and multiple second sensing electrodes which are arranged on the active area in a second direction; multiple first and second location detection lines which are formed on the first inactive area and respectively connected to the multiple first and second electrodes; and a pad unit which is formed on the second inactive area and includes multiple pads electronically connected to the multiple first and second location detection lines. The first sensing electrodes and the second sensing electrodes are made of different materials.
Patent KR-20130066532-A (KR)
Title: Background paging monitoring in multiple sim user equipment
Inventor: GONG ZHIJUN
IPC: H04W68/02
Filed: 2012-12-11
Abstract: PURPOSE: Background paging monitoring is provided to implement selective connection for a reception call of a second SIM(Subscriber Identity Module) by monitoring the background paging of a second SIM in an activation section connected to a communication resource. CONSTITUTION: A first SIM is connected to a communication resource, and a controller logic identifies the activation of a first SIM on a communication interface(302). The controller logic identifies paging switching time(304). The controller logic identifies paging switching duration(306). A second SIM receives a paging indicator. The controller logic receives the display of an incoming voice call from the second SIM(308). [Reference numerals] (302) Identify whether an SIM 1 is active; (304) Identify a paging switching time; (306) Identify a paging duration; (308) Receive the display of an incoming call on an SIM 2; (310) PS or CS ?; (312) Prevent the switching of a communication interface to the SIM 1; (314) Assign the communication interface to the SIM 2 in order to handle a voice call; (316) Identify a network controller; (318) Search a caller ID; (320) Notify the incoming call to a user on the SIM 2; (322) Inquire a user of interrupting the connection of the SIM 1; (324) Does a user receive a call?; (326) Return the communication interface to the SIM 1; (AA) Start; (BB) Yes; (CC) No; (DD) End
Patent KR-20140076889-A (KR)
Inventor: RYU YONG SUN
IPC: E02D5/80
Filed: 2012-12-13
Abstract: The present invention relates to a soil nailing structure using a geotextile and a slope reinforcing method using the same which comprises a boring step for forming a bored hole by boring a slope to be reinforced; an installing step for installing the soil nailing structure in the bored hole; a filling step for filling a grout material in the bored hole using the soil nailing structure; and a step for curing the grout material filled in the bored hole. The soil nailing structure according to an embodiment of the present invention comprises a reinforcing material lengthened in one direction and inserted into a bored hole on a slope; a bearing plate inserted into the head of the reinforcing material and mounted on the slope having the bored hole formed thereon; and a spacer arranging the reinforcing material in the center of the bored hole and combined with the reinforcing material, wherein the reinforcing material is made of a band shaped geotextile.
Patent KR-20140077747-A (KR)
Title: A diffential side oil seal
Inventor: PARK EUN MIN
IPC: F16H57/029
Filed: 2012-12-14
Abstract: The present invention is to provide a differential side oil seal. According to a proper embodiment of the present invention, the differential side oil seal comprises a reinforcing member and a sealing member. The sealing member includes a sealing body made of rubber materials connected to the reinforcing member; a main lip protruding from the sealing body toward a rotary shaft and interlocking with the outer surface of the rotary shaft to prevent an oil leakage between the rotary shaft and differential gear housing; multiple dust lip units protruding toward the rotary shaft from the sealing body and placed side by side to interlock with the outer surface of the rotary shaft outside the main lip; and a side lip protruding toward the opposite side of the main lip from the sealing body and placed to interlock with the inner surface of the differential gear housing installed outside the rotary shaft.
Patent KR-20140079549-A (KR)
Inventor: LEE MYUN WOO
IPC: G06Q50/22
Filed: 2012-12-14
Abstract: The purpose of the present invention is to provide a device for supporting pregnant women, which is easy to control and can provide pregnancy information continually. To achieve the above purpose, the present invention provides a device for supporting pregnant women, which can provide information necessary for pregnant women every day. The device includes: a main body which includes a memory to store pregnancy information necessary for childbirth and a control device to store information in the memory and search and process the stored information; an output device attached to the main body to display information outputted by the control device; an input device attached to the main body to acquire information inputted by a user and transmit the inputted information to the control device; and a microphone connected to the main body to transmit an external voice signal to the control device. The control device calculates a pregnancy period, based on a baby due inputted through the input device, outputs, through the output device, pregnancy information corresponding to a pregnancy period calculated every day, stores, in the memory, user information inputted through the microphone and the input device, and outputs, to the output device, the user information stored in the memory according to a request of the user.
Patent KR-20140086318-A (KR)
Title: Method for controlling electricity generation of vehicle
Inventor: MAING KWANG SEOG
IPC: B60W40/076
Filed: 2012-12-28
Abstract: A method for controlling electricity generation of a vehicle is disclosed. The method comprises a detecting step of detecting information on a corresponding downhill section when a downhill distance is greater than or equal to a first reference distance in a driving path of a vehicle; a first non-load operating step of operating an alternator in a non-load state when a distance between the position of the vehicle and a starting point of the downhill section is less than or equal to a second reference distance; and a cut-in dropping step of dropping the cut-in voltage of a battery to a first voltage when the distance between the position of the vehicle and the starting point of the downhill section is less than or equal to the second reference distance.
Patent KR-20140087292-A (KR)
Inventor: SMIRNOV VIATCHESLAV
IPC: F16C33/10
Filed: 2012-12-28
Abstract: A spindle motor according to one embodiment of the present invention includes: a rotating member which includes a shaft having a fixing groove on a lower side thereof, a hub base extended from the upper end of the shaft to the outside of a radius direction, and a magnet support unit extended from the outer end of the hub base to the lower side of an axial direction; a sleeve which supports the rotating member to be rotatable and includes a receiving groove recessed to the lower side of the axial direction on an upper side thereof; and a stopper member which includes a fixing unit inserted into the fixing groove and a flange part extended to the outside of the radius direction in the fixing unit. The hub base includes a protrusion part which protrudes from one side of the hub base and is stored in the receiving groove.
Patent KR-20140088951-A (KR)
Title: Smart Home Control Apparatus of Power Measuring Control System Using Bluetooth Module
Inventor: PARK HEE DONG
IPC: H04L12/24
Filed: 2012-12-31
Abstract: The present invention relates to a smart home control apparatus for a power measurement control system using a wireless communication module. The wireless communication module is a Bluetooth module and performs Bluetooth communication through a Bluetooth antenna. A smart phone terminal turns on or off a specific power control adaptor of one or more power control adaptors through the Bluetooth module, sets up a reservation (schedule), names power measurement control adaptors, displays a power amount, a temperature, and an on/off state, displays an accumulated use and a charge (numerals/grapes by month, day, and time), switches the on/off state, and performs an on/off reservation (schedule), thereby performing settings related to day, night, sleep, and vacation.
Patent KR-20140087690-A (KR)
Title: Nozzle system for removing chips
Inventor: HONG SOON KI
IPC: B23Q11/02
Filed: 2012-12-31
Abstract: The present invention relates to a nozzle system for preventing scattering and accumulation of foreign materials, such as chips, which are produced during a cutting process. The present invention provides the nozzle system comprising at least one rotating nozzle that is installed on the ceiling of a machine room, receives coolant and sprays coolant horizontally toward a space between the ceiling of the machine room and a machine tool; and a cleaning nozzle that is installed on the side wall of the machine room, receives coolants and removes remaining foreign materials after a cutting process.
Patent KR-20120019504-A (KR)
Inventor: VAN LOON JOHANNES MARIA
IPC: H04L47/22
Filed: 2010-07-13
Abstract: 본 발명은 원격통신 네트워크에서 혼잡 제어를 하기 위한 방법에 관한 것이다. 원격통신 네트워크는 단말기들을 위해 적어도 제1 및 제2 베어러를 제공함으로써 적어도 제1 및 제2 통신 단말기와 서버 사이에서 하나 이상의 활성 데이터 세션을 지원한다. 적어도 제1 및 제2 통신 단말기는 공통의 그룹 식별자가 저장되었거나 저장되는 그룹을 위해 할당된다. 나아가, 제1 및 제2 통신 단말기의 제1 베어러에 대한 제1 개별 혼잡 파라미터 및 제2 베어러에 대한 제2 개별 혼잡 파라미터가 저장되었거나 저장된다. 그룹 부하 인디케이터는 공통의 그룹 식별자에 대응하는 단말기들의 그룹에 대해 정의된다. 그룹 부하 인디케이터는 모니터되고, 공통의 그룹 식별자에 대응하는 적어도 제1 및 제2 통신 단말기들의 그룹에 대한 그룹 부하 조건과 비교된다. 상기 그룹 부하 인디케이터가 그룹 부하 조건을 충족시키는 경우에, 제1 베어러의 제1 개별 혼잡 파라미터 및 제2 베어러의 제2 개별 혼잡 파라미터 중의 적어도 하나를 조정함으로써 혼잡이 제어된다.
Patent KR-20120027478-A (KR)
Inventor: ARTHEY SPENCER JAMES ROBERT
IPC: A47L9/06
Filed: 2010-06-29
Abstract: 표면 처리 헤드는 본체, 브러쉬 유닛 및 수용 위치와 전개 위치 사이에서 브러쉬 유닛을 본체에 대해 움직이게 하는 구동 기구를 포함한다.  구동 기구는 압력실 및 이 압력실 내의 압력을 변화시키는 밸브 유닛을 포함한다.  이 밸브 유닛은 하우징, 이 하우징 안에 배치되는 밸브, 및 그 하우징에 배치되는 밸브 작동용 액츄에이터와 적어도 하나의 표면 접촉 부재를 포함하며, 상기 액츄에이터는 처리될 표면과의 접촉을 통해 상기 하우징에 대해 움직일 수 있고, 상기 표면 접촉 부재는 하방으로 액츄에이터를 넘어 연장되어 있다.  표면 접촉 부재가 처리될 표면과의 접촉을 유지하도록 하우징이 본체에 대해 움직일 수 있다.
Patent KR-20120049875-A (KR)
Inventor: SHIGEMIZU TETSURO
IPC: G01R19/165
Filed: 2010-02-24
Abstract: 이차전지의 추정 개방 전압에 근거하여 제 1 추정 충전율을 출력하고, 이차전지의 실측 전류 및 그 오차 상한치를 소정 주기로 적분한 결과와 이차전지의 전지 용량에 근거하여 제 2 추정 충전율을 출력하고, 실측 전류 및 그 오차 하한치를 소정 주기로 적분한 결과와 전지 용량에 근거하여 제 3 추정 충전율을 출력하고, 실측 전류를 소정 주기로 적분한 결과와 전지 용량에 근거하여 제 4 추정 충전율을 출력한다.  소정 주기의 기간 내에는 상기 제 4 추정 충전율을 충전율로서 출력하고, 소정 주기의 종점에 있어서, 제 1 추정 충전율이 제 2 추정 충전율과 제 3 추정 충전율의 사이의 추정 충전율의 값일 때는 제 1 추정 충전율을 충전율로 하고, 제 1 추정 충전율이 제 2 추정 충전율 이상의 값일 때는 제 2 추정 충전율을 충전율로 하고, 제 1 추정 충전율이 제 3 추정 충전율 이하의 값일 때는 제 3 추정 충전율을 충전율로 한다.
Patent KR-20120061864-A (KR)
Inventor: FUKUSHIMA DAISUKE
IPC: H01B1/20
Filed: 2010-08-11
Abstract: 하기 화학식 (1)로 표시되는 제1 구성 단위와, 하기 화학식 (2)로 표시되는 제2 구성 단위와, 하기 화학식 (3)으로 표시되는 제3 구성 단위 및 하기 화학식 (4)로 표시되는 제4 구성 단위로 이루어지는 군으로부터 선택되는 적어도 1종의 구성 단위를 포함하는 고분자 화합물. 
[화학식 1] 
   
[화학식 2] 
   
[화학식 3] 
   
[화학식 4]
Patent KR-20120080180-A (KR)
Inventor: GROENER ALFRED
IPC: B01D27/10
Filed: 2010-08-11
Abstract: 본 발명은 필터장치(1), 특히 유체 필터장치, 바람직하게는 오일 필터장치로서, 필터 하우징(3)에서 미정제부(4)와 청정부(5)를 분리하는 하나 이상의 필터 요소(2)와, 하나 이상의 필터 요소(2)를 우회하는 바이패스(9)를 조절하는 바이패스 밸브(8)를 구비하고 있는 필터장치에 관한 것이다. 상기 바이패스 밸브(8)는 바이패스 개구(11)를 조절하는 밸브부재(10)를 구비하며, 바이패스 개구는 미정제부(4)와 유체가 흐르도록 연결되어 있는 바이패스 밸브(8)의 연결챔버(15)를 청정부(5)에 유체가 흐르도록 연결시킨다. 바이패스 밸브(8)는 밀폐 스프링(17)을 포함하고, 밀폐 스프링은 밸브부재(10)를, 바이패스 개구(11)를 닫는 밀폐 위치에 놓이게 한다. 필터장치(1)를 여러가지 작동조건에 맞추어 사용하기 위해, 바이패스 밸브(8)는 밸브부재(10)에 작용하는 선응력을 바꾸는 작동장치(18)를 포함하고 있다.
Patent KR-20120068892-A (KR)
Inventor: O'SHEA FENTON
IPC: F16G13/02
Filed: 2010-09-08
Abstract: 엔진용 텐셔너 시스템은 적어도 하나의 종동 스프로킷, 적어도 하나의 구동 스프로킷, 체인, 및 체인에 장력을 주는 텐셔너를 포함한다. 유체가 텐셔너를 빠져나갈 수 있도록 하는 밸브에 의해 텐셔너의 댐핑을 능동 제어한다.
Patent KR-20120059598-A (KR)
Inventor: MCCAMY JAMES W
IPC: C23C16/455
Filed: 2010-08-16
Abstract: 본 발명은 글래스 리본 상의 코팅을 개선시키기 위해, 그리고, 이러한 코팅의 수율을 개선시키기 위해, 비직교 코터 기하 구조를 포함한다.  장치는, 글래스 형성 챔버에 제공되는 코팅 구역을 통과하는 제 1 가상 직선(23)을 따라 리본을 이동시키기 위한 제 1 구조물을 포함한다.  코터는 코팅 노즐(80)과 배출 슬롯(82)을 포함하고, 각각은 종방향 축을 갖는다.  코팅 노즐(80)은 코팅 구역을 향해 코팅 증기를 지향시키고, 배출 슬롯(82)은 코팅 구역으로부터 증기를 제거한다.  제 2 구조물은 상기 코팅 구역에 면하는 상기 코팅 노즐(80) 및 배출 슬롯(82)을 갖는 경로에 이격 관계로 코터를 장착한다.  제 2 가상 직선(94)은 코팅 노즐(80)의 종방향 축에 수직이고, 상기 제 1 가상 직선(23) 및 제 2 가상 직선(94)은 0도보다 크고 90도 이하인 범위의 각도를 이룬다.