baber/WOPTO huggingface dataset:
Patent KR-20060110930-A (KR)
Title: Sprue cooling device of mold
Inventor: SHIN GIL HO
IPC: B29C45/72
Filed: 2005-04-20
Abstract: A sprue cooling apparatus of a mold is provided to improve the productivity by promptly cooling a resin introduced into a sprue which is a passage for supplying the resin into the interior of the mold. A mold includes a fixed plate(10), a movable plate, and a sprue. In a sprue cooling apparatus of the mold, a cooling block(50) is provided at a lower portion of the sprue. A cooling hole(51) through which cooling water is circulated is formed in the interior of the cooling block. The cooling block is detachably mounted to the bottom surface of the fixed plate by means of an engaging member(60). The cooling hole has a U-shape and is provided on the outer circumferential surface of the sprue.
Patent KR-20060114483-A (KR)
Title: Driving device for electron emission device and the method thereof
Inventor: JEON DONG HYUP
IPC: G09G3/22
Filed: 2005-04-29
Abstract: A driving apparatus and a driving method of an electron emission device are provided to protect a panel and a driving circuit by restricting diode emission generated at the electron emission device by controlling anode voltage. A driving apparatus of an electron emission device includes a pixel unit(106); a power supply unit(103) for supplying anode power to the pixel unit, comparing an anode current value with a predetermined current value, and then outputting the compared value; and a control unit(102) for controlling the power supply unit to change the voltage level of the anode power correspondingly to the compared value output from the power supply unit. The power supply unit compares the anode current value with the predetermined current value by a comparator(101). The predetermined current value is for the peak luminance.
Patent KR-20060122107-A (KR)
Title: Mobile communication terminal with frequency modulation and its operating method
Inventor: KU BON HYOUK
IPC: H04B1/38
Filed: 2005-05-25
Abstract: A mobile communication terminal capable of transceiving a voice by using an FM module and an operating method thereof are provided to modulate a voice signal into FM frequency, thereby enabling a user to set an FM frequency band and significantly increasing portability and availability through usage of a PTT(Push-To-Talk) service. A mobile communication terminal capable of transceiving a voice by using an FM(Frequency Modulation) module comprises the followings: a microphone(10); a speaker(20); a wireless unit(30) which performs FM-modulation of transceived voice data into a preset frequency; and a controller which enables the voice data, inputted through the microphone(10), to be transmitted through the wireless unit(30) and enables the voice data, received through the wireless unit(30), to be outputted to the speaker(20).
Patent KR-20060122498-A (KR)
Title: Door opening and closing device for refrigerator
Inventor: KIM SEONG JAE
IPC: F25D23/02
Filed: 2005-05-27
Abstract: A door opening/closing device for a refrigerator is provided to move rotation centers of doors in direction to apart from each other along movement paths thereof provided by guide elements, thereby opening the doors without interference of gasket elements. A door opening/closing device for a refrigerator includes hinge elements(45) connected between doors and a main body of the refrigerator. Guide elements(80) are mounted over the main body and the doors for guiding movement of rotation centers of the doors when the doors are opened. The guide elements have cam guides(84) for guiding translation and rotation paths for the doors, and cam bosses(82) mounted in guide holes(85) of the cam guides on the doors to move along the cam guides.
Patent KR-20060123972-A (KR)
Title: Ceiling cover with device for navigating a mobile robot
Inventor: LEE HYANG JE
IPC: E04B9/04
Filed: 2005-05-30
Abstract: A ceiling finishing member for mobile robot navigation is provided to install an RFID tag which provides location information for autonomic movement of a mobile robot to the ceiling plane easily and to promote convenience of life by adding a lighting function to the ceiling finishing member. A ceiling finishing member for mobile robot navigation comprises: a finishing member(10) formed by piling up an adhesive layer and a back coat layer on the backside of a decoration sheet in order, and attached to the ceiling plane or another ceiling finishing member using the adhesive layer after taking off the back coat layer; and many protective housings(20) installed to the front of the decoration sheet of the finishing member and provided with a Ý¿-shaped fitting groove and a projection to fix the front of a Ý‹-shaped fixing member and a built-in RFID tag having a self-powered device, a human body sensor and a light-emitting diode(LED) to navigate a mobile robot(3) and to turn on a light by sensing the human body in the dark.
Patent KR-20060124058-A (KR)
Title: Apparatus and method for authentication
Inventor: CHAE KYOUNG SOO
IPC: G06F19/00
Filed: 2005-05-30
Abstract: An authentication device and a method thereof are provided to prevent stealth of an entry card and improve authentication correctness by detecting weight and a walking pattern of a user, and applying the detected weight/walking pattern of the user to entry authentication. A pressure sensor(11) detects the weight of the user. An inertia sensor(12) detects the walking pattern of the user. A microcomputer(13) generates an entry permission signal for the user in case that the detected weight/walking pattern of the user is matched with the stored weight/walking pattern of the user within a specific range. A wireless communicator(14) wirelessly transmits the entry permission or refusal signal. The device is installed to shoes of the user. The microcomputer includes a memory(132) storing the weight/walking pattern of the user and an operator(131) generating the entry permission signal for the user in case that the detected weight/walking pattern of the user is matched with the stored weight/walking pattern within the specific range.
Patent KR-20060127713-A (KR)
Title: Device and method for saving electric power consumption of television system
Inventor: SEO GI JUN
IPC: H04N5/63
Filed: 2005-06-08
Abstract: A device and a method for saving electric power consumption of a television system are provided to reduce power consumption by cutting off power supplied to an unoperated part by selectively supplying power to a broadcasting signal processor and to an external input unit. A power supply unit(100) supplies power. A broadcasting signal processor(130) outputs audio signals and video signals of broadcasting signals of a selected channel. The broadcasting signal processor includes a tuner(132) selecting a channel, and an intermediate frequency amplifier(134) amplifying the selected channel to output the audio and video signals. An output terminal(150) receives the audio and video signals from the broadcasting signal processor or an external input unit(140) for outputting the audio and video signals to a speaker and a picture. A power switch unit(110) selectively supplies power to the broadcasting signal processor or the external input unit. A control unit(120) controls the power switch unit to cut off power supplied to the broadcasting signal processor or the external input unit which is not being operated.
Patent KR-20060130959-A (KR)
Title: Ommited
Inventor: OH EUN YEONG
IPC: C09D201/00
Filed: 2005-06-14
Abstract: Provided is a high-speed curable surface coating agent, which has highly increased drying and hardening rates and improved physical properties, increases a service life of color asphalt, and facilitates maintenance and repair of color asphalt. The surface coating agent for color asphalt is prepared by mixing one selected from various synthetic resin polymers or elastomers, or a combination thereof with one organic solvent selected from methylene chloride or 141b, or a combination thereof, homogeneously. The solvent further comprises at least one solvent with a high boiling point. The coating agent further comprises at least one admixture selected from various physical admixtures and chemical admixtures in order to reinforce physical and chemical properties of the surface coating agent.
Patent KR-20060131505-A (KR)
Title: Monitoring system in exposing apparatus and control system with the same
Inventor: KIM EUN SU
IPC: H01L21/66
Filed: 2005-06-16
Abstract: A monitoring system of an exposure apparatus and a control system including the same are provided to display a wafer processing number, a wafer processing time, and a total processing lot as well as an operating of the exposure apparatus. A first display section(1461) is used for displaying an operating state, a warning state, and an error state of an exposure apparatus. A second display section(1463) is used for displaying a processing number of a processing wafer in the exposure apparatus. A third display section(1465) is used for displaying a processing time of the wafer. A fourth display section(1467) is used for displaying a wafer processing lot number in the exposure apparatus.
Patent KR-20060133359-A (KR)
Title: Image forming apparatus having a color sensor
Inventor: KIM TAE YOUNG
IPC: G03G15/01
Filed: 2005-06-20
Abstract: An image forming apparatus including a color sensor is provided to enable the color sensor including a light emitting unit and a light receiving unit to be installed in a transfer path of a document and read a color of an image formed in a sheet, thereby acquiring printing quality with rich colors. In an image forming apparatus including an image forming unit(10) for forming an image on a predetermined document, the image forming apparatus comprises a color sensor(20) and a color reader(50). The color sensor(20) comprises the followings: a light emitting unit(30) which is installed on a transfer path of the document, and generates predetermined light to the document where the image is formed in the image forming unit(10); and a light receiving unit(40) which receives reflected light reflected from the document and outputs an electric signal corresponding to the reflected light. The color reader(50) reads a color of the image, formed in the document, through the electric signal outputted from the light receiving unit(40).
Patent KR-20060049432-A (KR)
Inventor: JO IN HO
IPC: G06F3/00
Filed: 2005-06-22
Abstract: 본 발명의 목적은 가정용 콘솔형 비디오 게임기에 과금기능을 부여하여 업소용 게임기로 사용할 수 있게 하는 게임 인터페이스 장치를 제공하는데 있다. 
     본 발명의 게임 인터페이스 장치는 비디오 게임기(300)의 A/V신호출력부(311)에서 업소용 게임기 본체(200)의 A/V신호처리부(210)로 전송되는 A/V신호를 중간에서 픽업하는 A/V검출부(112)와, 게임 프로그램 별 자동 프리세팅 정보, 특정 영상화면 체크를 위한 복수 지점의 좌표값과 그 좌표값 지점들의 색신호정보, 특정 영상화면 체크를 위한 뮤트정보 및 키입력 맵핑정보를 가지는 프로그램팩(400)과, 업소용 게임기 본체(200)의 1P,2P키버튼(215,216)신호를 비디오 게임기(300)의 1P,2P포트(315,316)로 중계 출력하는 키입력맵핑모듈(120)과, 업소용 게임기 본체(200)내 코인박스(213)로부터의 과금신호에 기초하여 게임진행 단계별 A/V신호에서 오디오 뮤트정보 및 영상화면의 특정 좌표점의 색신호정보를 추출한 후 상기 프로그램팩(400)의 기준값에 비교하여 게임진행 상황을 판단하고 그 게임진행 상황에 따라 키입력맵핑모듈(120)을 통해 비디오 게임기(300)의 1P,2P포트로 전달되는 키입력신호를 제어하는 제어부(111)와, 상기 제어부(111)에 의한 게임진행 제어 상황을 모니터로 출력하기 위한 OSD구동부(113)를 포함하는 것을 특징으로 한다. 
       
      가정용 게임기, 좌표값, 영업용, 맵핑정보, 인터페이스, 프로그램팩
Patent KR-20070000316-A (KR)
Title: Flat fluorescent lamp
Inventor: KIM MIN JOO
IPC: G02F1/13357
Filed: 2005-06-27
Abstract: A flat type of fluorescent lamp is provided to minimize the area of main electrode, thereby improving the brightness at a corner region of the fluorescent lamp, by forming a plurality of stripe-shaped auxiliary electrodes between main electrodes formed at both ends of the fluorescent lamp. A first flat plate(100a) and a second flat plate are disposed to face each other. A first main electrode(110) is formed at first ends of the first and second flat plates. A second main electrode(120) is formed at second ends of the first and second flat plates. First and second auxiliary electrodes(110',120') are independently formed between the first and second main electrodes. At least one resistor(130) connects the first main electrode and the first auxiliary electrode and the second main electrode and the second auxiliary electrode. A distance between the first and second auxiliary electrodes is shorter than a distance between the first and second main electrodes.
Patent KR-20070000574-A (KR)
Title: Plasma etching equipment
Inventor: JUNG WOO JIN
IPC: H01L21/3065
Filed: 2005-06-28
Abstract: A plasma etching apparatus is provided to prevent Vpp drop effect of high-frequency power by maintaining constantly a gap between a baffle plate and a depo shield or the baffle plate and an inner wall of a process chamber. A process chamber(300) is used for supplying a reaction gas. An electrostatic chuck(200) is positioned at a lower part of the process chamber. A wafer(100) is loaded into the electrostatic chuck. A baffle plate(400) is installed between the process chamber and the electrostatic chuck in order to seal a bottom of the process chamber and discharge products due to etching reaction. A baffle plate supporter(410) is formed at a lower end of the baffle plate in order to maintain constantly a gap between the baffle plate and an inner wall of the process chamber.
Patent KR-20070004315-A (KR)
Title: Apparatus for manufacturing a color filter and method for manufacturing a color filter
Inventor: LEE KWONG HO
IPC: G02F1/1335
Filed: 2005-07-04
Abstract: An apparatus for manufacturing color filters and a method for manufacturing the color filters are provided to make the evaporation speed of color resin uniform over a color resin layer, thereby minimizing the step difference of the color filter layer, by ejecting air within a chamber to the outside after dropping color resin on the substrate. A housing part(30) is disposed above a substrate, wherein the housing part surrounds the substrate and a black matrix. The housing part has a chamber(45) for blocking the black matrix from the outside. At least one vacuum line(40) is configured to eject air within the chamber. A sealing member(35) is positioned at the contact surface between the housing part and the substrate, and seals the chamber.
Patent KR-20070008145-A (KR)
Title: The manager methodology for network-based managed security services
Inventor: LEE YOUNG SEOK
IPC: H04L12/22
Filed: 2005-07-13
Abstract: A method for managing a security service of a network-based management type is provided to enable a user to use a management function and security policy setting of each user, and integrally manage security equipment through a GUI(Graphic User Interface) environment for each user. Connection to a security service system is set up and the user performs login through user authentication(S2). The user sets a scope/network area of the security policy setting according to authority set to the login user by using the GUI environment customized to the user(S20). The scope/network area of the user is applied with discrimination from the scope/network area of other users(S16).
Patent KR-20060046597-A (KR)
Title: Laser scanning and sensing device for detection around automatic doors
Inventor: ZAMBON ALAIN
IPC: G01S17/87
Filed: 2005-07-22
Abstract: A door sensor system (90) for detecting a target object (56) in and/or near a door comprising a door opening (96), and at least one movable door element (76; 76-1, 76-2, 76-3, 76-4), the system comprising at least one light scanner device (10) which is capable of measuring optically the distance to a target to make such a measurement over a given scan angle at regular intervals by deflecting the light with moving mirrors, and which generates at least one vertical plane of detection.
Patent KR-20070014585-A (KR)
Title: Apparatus for aligning a semiconductor substrate
Inventor: PARK HAN WOO
IPC: H01L21/027
Filed: 2005-07-29
Abstract: A substrate align apparatus is provided to align exactly a substrate by performing a substrate align process in a normal state alone of the light irradiated onto an align mark using a sensor unit and a control unit. A substrate align apparatus includes a light source unit(120) for irradiating light onto a substrate, a detecting unit(130) for detecting an align mark from the light reflected from the substrate, a stage(110) for supporting the substrate and controlling the position of the substrate on the basis of the align mark detected by the detecting unit, a sensor unit(150) for measuring the intensity of light at one side of the light source unit, and a control unit. The control unit(160) is used for determining the state of the light source unit by comparing the intensity of light obtained from the sensor unit with a reference value.
Patent KR-20070020649-A (KR)
IPC: G02F1/167
Filed: 2005-08-16
Abstract: 본 발명은 전기습윤(eletrowetting) 현상을 이용하는 액체 유동형 전자종이에 관한 것으로, 종래의 액체 유동형 전자종이에서 투명전극 및 방수절연층은 수평한 층 구조로 이루어졌기 때문에 전압이 인가될 때 기름막의 뭉침 면적이 크고 그로 인해 백색 반사판의 노출면적이 크지 않아 백색 구현효과가 떨어지는 문제점이 있었던바, 본 발명에 따라 광 투과성 막과 소정의 간격을 두고 대향 배치되는 백색 반사판; 상기 백색 반사판에 내접하는 투명전극; 상기 투명전극에 당접하여 코팅된 방수절연층; 상기 방수절연층과 상기 광 투과성 막 사이에 존재하여 화소공간을 형성하는 투명한 친수성 액체; 및 상기 친수성 액체의 하단부에 존재하는 색을 띠는 기름막이 포함되어 이루어지고, 상기 투명전극 및 방수절연층의 적어도 한쪽 측면에 기름막이 응집되도록 차단하는 블록부가 형성된 것을 특징으로 하는 액체 유동형 전자종이에 의하는 경우, 기름막이 뭉쳐지는 정도를 증가시켜 백색 반사판의 노출면적을 증가시키기며 이로 인한 우수한 백색 구현 효과가 있는 것이다.   
       
     전자종이, 액체 유동형, 절연체
Patent KR-20070021478-A (KR)
IPC: G06Q10/00
Filed: 2005-08-18
Abstract: 본 발명은 여러 가지 단계의 학습방법을 통해 영어단어의 발음을 매우 간편하고 효율적으로 학습할 수 있는 방법으로, 영영사전의 발음기호를 근간으로 하여 이를 단어 상에 소정의 형태로 표기하여 줌으로써 별도의 영한사전 식 발음기호를  재차 찾아 표기 또는 암기하지 않고도 직접 단어를 보면서 쉽게 발음할 수 있도록 한 영어단어 발음 학습방법이며, 동시에 상기 영어단어 발음 학습방법을 이용한 영어교제 및 영상매체 등의 합습매체를 제공하는 것이다. 
     영어, 단어, 발음, 표시, 표기, 학습
Patent KR-20060053153-A (KR)
Inventor: WATANABE TAKATOSHI
IPC: G11C11/40
Filed: 2005-08-19
Abstract: 본 발명은, 하나의 메모리 제어 컨트롤러(LSI)에 의해 제어 방식이 상이한 복수종의 RAM을 제어할 수 있도록 하는 것을 목적으로 한다.  이를 위해, LSI 구성의 메모리 제어 회로(1)는, CPU 등의 상위의 제어부(도시 생략)로부터, RAM 소자의 종별에 따르지 않는 신호인 RAM 액세스 요구 신호(100)를 받아 부하의 RAM 소자(10)에 대하여 RAM 제어 신호·데이터군(200)을 송신하여 이것을 제어한다.  신호(100)를 수신한 메모리 액세스 RAM 비지 관리 회로(11)는, 실제로 접속되어 있는 RAM 소자(10)에 적합한 RAM 커맨드·데이터(300)를 작성하고 이것을 메모리 액세스 공통 제어 회로(13)에 송신한다.  신호(300)를 수신한 메모리 액세스 공통 제어 회로(13)는, RAM 제어 신호·데이터군(200)을 작성하여 이것을 RAM 소자(10)에 송신한다.   
       
     메모리 제어 회로, RAM 소자, RAM 종별 레지스터, RAM 제어 커맨드·데이터, RAM 종별 신호
Patent KR-20070021623-A (KR)
IPC: B60C13/00
Filed: 2005-08-19
Abstract: 본 발명은, 스노우체인 설치부를 가진 자동차용 타이어를 제공하기 위한 것이다. 종래에는 타이어에 스노우체인 설치부가 설치되어 있지 아니하여 스노우체인 그 자체에 스노우체인을 타이어나 휠에 고정시키기 위한 고정수단을 구비하지 않으면 아니되어 스노우체인의 제조가 곤란하고 스노우체인의 장착 작업이 불편한 결점이 있었던 바, 본 발명은 타이어의 비드부 외측에 설치되는 림 프로텍트 바를 개량하여 이에 걸이홈을 형성시키고 걸이홈에 스노우체인을 설치할 수 있게 한 것임.
Patent KR-20070021728-A (KR)
IPC: H04B1/38
Filed: 2005-08-19
Abstract: A slide driving-type portable terminal is provided to allow a rotating unit of a main body to rotate as a user slides a slide body on the main body to make a call so that a transmitting unit disposed in the rotating unit is rotated toward the user, thereby reducing the inconvenience during the call. A slide body(110) is equipped with a display(111) and a receiving unit(112). A main body(120) is combined with the slide body(110) so that the slide body(110) performs slide motion. A rotative body(130) is equipped with a keypad(131) and a transmitting unit(132), is rotatively combined with the main body(120), and is rotated toward the slide body(110) as the slide body(110) does the slide motion.
Patent KR-20070023215-A (KR)
IPC: H01L21/68
Filed: 2005-08-23
Abstract: 리프트 장치 및 이를 이용하여 반도체부품을 장착 및 탈착하는 방법들을 제공한다. 상기 리프트 장치는 리프트 축을 구비한다. 상기 리프트 축의 하단부에 지지대가 고정되어 배치된다. 상기 지지대 하부에 이동유닛이 배치된다. 상기 리프트 축의 상단부에 개구부를 갖는 안전대가 고정되어 배치된다. 상기 지지대 및 상기 안전대 사이에 상기 리프트 축을 따라 수직이동이 가능한 물체받침대가 배치된다. 상기 물체받침대의 일측에 상기 물체받침대의 높낮이 조절부가 배치된다.  
       
     리프트 장치, 안전대, 개구부, 물체받침대, 높낮이 조절부, 회전판, 위치고정턱
Patent KR-20070026993-A (KR)
Title: Liquid crystal display panel and method of fabricating the same
Inventor: KIM KYUNG WOOK
IPC: G02F1/136
Filed: 2005-08-29
Abstract: An LCD(Liquid Crystal Display) panel and a method of manufacturing the LCD panel are provided to prevent the horizontal line phenomenon by compensating for a charging rate variation due to data delay. A first thin film transistor(TFT1) for providing a data signal having a polarity opposite to the polarity of a previous horizontal line is formed. A second thin film transistor(TFT2) for providing a data signal having the same polarity as that of the previous horizontal line is formed. At least one of the channel width and the channel length of the second thin film transistor is different from the channel width and the channel length of the first thin film transistor. The channel width of the second thin film transistor is smaller than the channel width of the first thin film transistor. The channel length of the second thin film transistor is greater than the channel length of the first thin film transistor.
Patent KR-20070027322-A (KR)
Title: Apparatus and method for a did implementation of key phone system
Inventor: CHO EUI SEOK
IPC: H04M3/22
Filed: 2005-09-06
Abstract: A DID(Direct Inward Dialing) realization device in a keyphone system and a method thereof are provided to connect a relay element of an E&M(Ear and Mouth) circuit to a transformer center coupled with a DID circuit, thereby realizing the keyphone system through DID with reduced hum noise even without adding a new element or separating a hybrid trunk board. A hybrid trunk board(130) consists of a DID circuit, a transformer coupled with the DID circuit, and a relay element for connecting a center of the transformer with a ground(GND). A controller(120) turns on or off the relay element, so that the transformer center of the hybrid trunk board(130) is connected with or separated from the ground(GND). The hybrid trunk board(130) further comprises an E&M circuit and a relay element for connecting the E&M circuit with the ground(GND).
Patent KR-20070028132-A (KR)
Title: Air-conditioner for both heating and cooling
Inventor: KIM JAE YOUNG
IPC: F25B39/00
Filed: 2005-09-07
Abstract: An air-conditioner having heating and cooling systems is provided to improve the efficiency of the air-conditioner by forming a heat exchanger to vary the heating area. An air-conditioner having heating and cooling systems a circulating passage(61,65,75), a heat exchanger(56), and a valve device. The circulating passage where the flow direction of the coolant is changed according to heating or cooling mode of the air-conditioner. The heat exchanger is installed on the circulating passage, composed of a basic channel(56a) and an extension channel(56b) to vary the heating area, and condensed or evaporated the coolant. The valve device is located on the circulating passage to control the flow of the coolant by opening and closing the passage which is connected to the extension channel.
Patent KR-20070029436-A (KR)
Title: Slab structure for a building
Inventor: JEON JIN YONG
IPC: E04F15/20
Filed: 2005-09-09
Abstract: A slab structure of a building is provided to effectively decrease the vibration noise from the floor slab to the indoor space by blocking the vibration noise of the low frequency band by the reinforcing members. A slab structure of a building comprises a ceiling slab(11); a floor slab(12) horizontally arranged with the ceiling slab; a wall slab(13) connected to the ceiling and floor slabs to divide an indoor space with the slabs; a finishing material layer horizontally placed with the slab of the indoor space of at least one of the ceiling, floor, and wall slabs; and honeycomb-shaped reinforcing members(61) placed between the finishing material layer and the slab horizontal to the finishing material layer. Plural connecting member(42) are installed between the finishing material layer and the wall slab to support the finishing material layer at the wall slab. A soundproof member(67) is installed between the finishing material layer and the reinforcing member.
Patent KR-20070033706-A (KR)
Title: 광 확산판 및 이를 포함하는 백라이트 어셈블리 및표시장치
IPC: G02F1/13357
Filed: 2005-09-22
Abstract: 선광원으로부터 발생한 빛의 휘도분포를 제어하며, 선광원과 선광원 사이에서 상기 수납용기와 밀착하여 결합하는 지지부와 상기 선광원 근방에서 상기 선광원을 둘러싸도록 상기 지지부로부터 융기 형성된 광 확산부를 포함하는 판상의 광 확산 부재를 포함하는 표시장치가 개시된다.  광 확산 부재는 수납용기와 밀착하여 결합함으로써, 유동이 최소화되며 마찰에 의한 마모나 소음 발생이 줄어든다.  광 확산 부재의 광 확산부는 선광원의 중심으로부터의 각거리에 따라 두께가 변화하여 휘도 분포를 균일하게 할 수 있다.