baber/WOPTO huggingface dataset:
Patent KR-20000016374-A (KR)
Title: Irradiation device and method for fluids especially for body fluids
Inventor: MOWAT DAVID MCIVOR
IPC: A61L2/24
Filed: 1997-05-29
Abstract: PURPOSE: Disclosed is a device suitable for use in use in the sterilization of a fluid such as a biological fluid or a fraction thereof, containing lymphocytes and/or micro-organisms. CONSTITUTION: The device (1) comprises a vessel (2) having an inlet (4) and an outlet (5) and a passage (3) which extends non-tortuously therebetween. The passage (3) has a heat exchange device (14) with a heat exchange surface (10) in substantial direct thermal contact with the interior of the passage (3). A temperature control means (7) is formed and arranged to maintain temperature of fluid (17) in the passage (3) below a temperature at which fluid (17) components may form insoluble particles during irradiation. The passage (3) has a wall which is substantially transparent to a lymphocyte and/or micro-organism inactivating radiation (20). The passage (3) contains a static mixer device (6) which is formed and arranged for thoroughly mixing the fluid (17) in use of the device so as to bring substantially the whole of the fluid (17) into an irradiation zone (19) extending along and in substantially direct proximity to the passage walls (3) during passage between the inlet (4) and the outlet (5)and into contact with the heat exchange surface (10). In use of the device(1) substantially the whole of a body of fluid to be sterilized passes through the vessel (2) and may be exposed to a similar substantial level of irradiation whilst maintaining it at a safe temperature.
Patent KR-19990067808-A (KR)
Title: 비휘발성 아날로그 및 멀티레벨 메모리 집적 회로에 대한 열 중복 방법 및 장치
IPC: G11C11/56
Filed: 1999-01-08
Abstract: 본 발명은 저장 어레이로 열 중복 회로를 제공하고, 회로는 제조상의 결함으로 인한 생산 양품율을 높이기 위해 비휘발성 메모리 칩에 사용된다. 본 발명은 중복 정보를 래치하고 전송하는 방법, 중복 논리 회로, 열 중복성을 가진 어레이 아키텍처, 열 중복 메모리 셀을 프로그램하고 판독하는 방법, 퓨즈를 다중화하는 방법, 및 열 중복 인에이블/디스에이블 신호로서 범위밖의 어드레스를 사용하는 회로를 포함하고 있다.
Patent KR-19990077617-A (KR)
Title: 메타크릴산메틸의제조방법
IPC: C07C255/12
Filed: 1999-03-05
Abstract: 청산과 아세톤으로 아세톤시안히드린을 제조하는 공정1과, 아세톤시안히드린을 수화시켜서 α-히드록시이소부티르산아미드를 제조하는 공정2와, α-히드록시이소부티르산아미드와 메탄올로 α-히드록시이소부티르산메틸과 암모니아를 제조하는 공정3과, α-히드록시이소부티르산메틸을 탈수시켜서 메타크릴산메틸을 제조하는 공정4와, 또한 메탄올과 공정3에서 얻어진 암모니아를 분자상산소의 공존하에 고체촉매상에서 반응시켜, 기체상의 청산을 제조하는 공정5로된 메타크릴산메틸의 제조방법. 
     공정3에서 메탄올을 사용하므로서 반응계로부터 생성된 암모니아를 제거하여 반응의 평형을 생성측으로 용이하게 이동시키기때문에, α-히드록시이소부티르산아미드로부터 α-히드록시이소부티르산메틸로의 전환율이 증가한다. 
     공정3에서 메탄올을 사용하므로서 분리와 정화의 공정을 생략하여 효율적으로 공정을 연결하는 추가적인 이점이 있고 제조비용을 절감시킨다.
Patent KR-19990064467-A (KR)
Title: 음료용기 개방용 합성수지제 손잡이
IPC: B65D17/28
Filed: 1999-03-09
Abstract: 본 발명은 식 음료용 금속제 용기를 개방하는 손잡이에 관한 것으로, 젖힘 작용에 의하여 음료용기의 상부를 개방하는 음료용기 개방용 손잡이에 있어서, 손잡이가 굴곡탄성율 2500 MPa이상(ASTM D790), 내열온도 80℃이상(ASTM D648), 신율이 50%이하(ASTM D638)인 엔지니어링 플라스틱으로 제조되고 손잡이의 두께가 1∼5mm인 것을 특징으로 하며, 본 발명에 의하여 음료용기 개방용 손잡이는 합성수지 재질로 대체될 수 있으며, 이에 의하여 생산공정의 단축은 물론, 제품 원가를 크게 줄일 수 있다.
Patent KR-20000059899-A (KR)
Inventor: LEE CHANG GYU
IPC: H04B7/155
Filed: 1999-03-09
Abstract: PURPOSE: An apparatus for stabilizing a base station amplifier is provided to stably operate the base station amplifier by using an isolation port to add one signal path, and by maintaining signal streams of the base station amplifier for a long time. CONSTITUTION: A balanced amplifier separates inputted signals to each path to amplify the signals as regular gains, and couples the amplified signals. Couplers(10,40) are located in an input port and an output port of the balanced amplifier to separate or couple the signals. A preliminary amplifying element(50) amplifies one or more than one signal of the input port coupler as a regular gain. The preliminary amplifying element is equipped on a path. The path shorts each isolation port of the input port coupler and the output port coupler. The preliminary amplifying element is operated as a gain multiplied as a fixed number for gains of each amplifying element. Each of the amplifying elements amplifies signals separated to each path from the input port coupler.
Patent KR-20000060089-A (KR)
Title: Method for forming trench of semiconductor device
Inventor: JI PIL SEON
IPC: H01L21/76
Filed: 1999-03-11
Abstract: PURPOSE: A method for fabricating a trench of a semiconductor device is provided to prevent the semiconductor device from being damaged by forming the top portion of shallow trench isolation area to a rounded shape. CONSTITUTION: A first insulation film and a second insulation film are sequentially formed on a semiconductor substrate(21). Then, a photo sensitive film pattern is formed such that a part of the second insulation film is exposed. The second and first insulation films are etched by using the photo sensitive film pattern as a mask thereby forming a second pad insulation film(23a) and a first pad insulation film(22a). Then, the photo sensitive film pattern is removed. A cleaning process is carried out after forming a trench on the semiconductor substrate(21). A side of the first pad insulation film(22a) is isotropically etched. Then, the top edge portion of the trench is rounded by further etching the side of the trench by using the first and the second pad insulation films(22a,23a).
Patent KR-19990078041-A (KR)
Title: 액정표시장치
IPC: G02F1/1335
Filed: 1999-03-18
Abstract: 본 발명은 광시야각인 액정표시장치를 실현하기 위하여, 편광판, 컬러필터에 의한 흡수손실을 저감하기 위하여, 반사형색선택수단, 반사형편광선택수단, 광로변환소자 등의 배치를 규정하여, 밝이를 향상한 고성능의 표시를 실현하는 것을 목적으로 한 것이며, 그 구성에 있어서, 액정표시장치를, 편광을 제어하여 화소의 긴축방향을 조명장치로부터의 직선편광성분출사광의 높은 방향으로 대략 평행하게 되도록 구성한 액정표시소자(20)와, 액정표시소자의 배면에 배치한 조명장치(50)와, 조명장치의 뒷면에 배치한 반사수단(54)과, 액정표시소자와 조명장치사이에 배치한 광로변환수단(40), 및 반사형편광선택수단(30)과, 액정표시소자의 상기 조명장치와는 반대쪽에 배치한 스크린(10)에 의해 구성하는 것을 특징으로 하는 것이다.
Patent KR-20000060788-A (KR)
Inventor: LEE JONG UK
IPC: H01L21/316
Filed: 1999-03-19
Abstract: PURPOSE: A method for manufacturing a silicon-on-insulator device is provided to prevent a void on a bonding boundary and to stabilize a bonding of a supporting substrate, by using a thermally stabilized low temperature thermal oxidation layer as a bonding medium. CONSTITUTION: A method for manufacturing a silicon-on-insulator device comprises the steps of: preparing a silicon substrate(1) having a field oxidation layer on a side surface; forming a buried oxidation layer(3) on a side surface of the silicon substrate to cover the field oxidation layer(2); etching a predetermined portion of the buried oxidation layer, and forming a contact hole exposing a predetermined portion of the silicon substrate to the buried oxidation layer; forming a capacitor(10) contacting the exposed silicon substrate to the buried oxidation layer; forming an oxidation layer(7) of which the surface is planarized, on a side surface of the silicon substrate including the capacitor; forming a silicon layer(11) on the oxidation layer; performing a low temperature thermal process regarding the silicon layer, and forming a first thermal oxidation layer on a portion of the silicon layer; preparing a supporting substrate(21) having a second thermal oxidation layer on a side surface, and bonding the silicon substrate to the supporting substrate to have the second thermal oxidation layer and the first thermal oxidation layer contact each other; polishing the other side surface of the silicon substrate by using the field oxidation layer as a polishing stop layer; and forming a transistor on the remaining silicon substrate.
Patent KR-20000022609-A (KR)
Inventor: SAKAMOTOGENICHI
IPC: H04L69/40
Filed: 1999-03-29
Abstract: PURPOSE: An IP(internet protocol) packet communication device is provided to detect the quality degrade of an optic channel forming a packet network and perform the conversion of the optic channel according to the detection of the quality degrade. CONSTITUTION: An IP packet communication device comprises input/output interfaces(1)connected to an optic network, and a switch(2) transmitting the IP packet input from the input interface to prescribed output path in accordance with the header value of the IP packet. The output interface transmits the IP packet to the optic network and monitors the IP packet from the input interface, thereby monitoring the transmission quality of the network and generating the control packet. The input interface identifies and receives the control packet and the IP packet, and interprets the received control packet.
Patent KR-20000061781-A (KR)
Inventor: KIM GI HONG
IPC: F27B3/10
Filed: 1999-03-31
Abstract: PURPOSE: A driver for turning the electrode bar of an electric furnace is provided to produce excellent casting products by increasing the efficiency of the electric furnace and by equalizing the flow of molten substances. CONSTITUTION: A forward and reverse rotating motor installing a decelerator is rotated and a driving gear is rotated, and then a driven gear is driven on a supporter(2) of a turning driver. Thus, a plate(4) and a clamp supporter(8) are turned together and an electrode bar(11) fixed to an electric hydraulic clamp(9) is turned. Using a hydraulic cylinder(7) connected to the clamp supporter, the slant angle of the electrode bar is changed and the turning radius of the electrode bar is adjusted.
Patent KR-19990064528-A (KR)
IPC: A45D40/30
Filed: 1999-04-01
Abstract: An eyebrow dressing stamper apparatus, the apparatus comprising: a body; two ink cartridges, each releasably mounted to front end and rear end of the body and filled therein with dressing ink for being exuded when applied thereto by external force; a pusher movably installed within the body for receiving an external force to apply same to the ink cartridges; and a manipulating apparatus connected to the pusher in order to transmit a manipulating force of a user to the pusher, such that when a user puts an ink injection screen to desired eyebrow areas to manipulate the manipulating apparatus, manipulating force of user on a rear side of the ink injection screen via the pusher to inject the dressing ink filled in the ink cartridges and to be coated on the eyebrow areas, thereby enabling a swift dressing of eyebrows and varying eyebrow dressing with maximized natural beauty applied thereto.
Patent KR-19990078558-A (KR)
Title: 전력증폭및변환장치
Filed: 1999-04-24
Abstract: 본 발명 전력증폭 및 변환장치는 종래의 전력변환장치가 전력변환을 위해서 반드시 회전시킬 수 밖에 없었던 회전자를 오히려 고정시키고 반대로 종래에는 고정되어있던 브러쉬를 DC모터로 회전시켜주므로써 회전자가 회전하므로써 발생하는 손실(풍손, 브러쉬손. 기계손)과 소음을 방지할 수 있도록 하는 동시에, 회전자의 고정으로 인해 전력변환장치의 내구성과 안정성, 편리성이 증가되는 효과를 가지며, 회전자와 고정자가 최대한 가깝게 밀착한 상태에서 회전자와 고정자간의 반대자극을 일치시킬 수 있게 되므로 기자력을 무한대로 높이고, 역률을 100으로 높이는 과정에서 전력의 증폭효과를 얻을 수 있는 것이다. 
     또한 소용량 DC모터에 의해 브러쉬만을 회전시키고, 회전속도를 쉽게 조절 할 수 있으므로 매우 높은 전압의 AC출력도 용이하게 조절할 수 있으므로 주파수 변환기기인 인버터와 같은 부가적인 장치를 사용하지 않고도 직류전원을 교류로 바꿀 수 있게 되어 전력의 변환도 가능하므로 전력증폭 및 변환장치의 제작비용의 절감과 전력생산에 필요한 에너지사용량도 획기적으로 절감시킬 수 있는 효과를 갖는 것이다.
Patent KR-20000074425-A (KR)
Inventor: AHN JONG GEUN
IPC: G06F9/355
Filed: 1999-05-20
Abstract: PURPOSE: An address extensible data processing system is to provide a microprocessor of a von Neumann structure which can access an extended data memory. CONSTITUTION: An instruction register(106) stores instructions inputted from a memory device(200) through a data bus(DB£7:0|) in a fetch step. An instruction decoder(104) decodes the instructions stored in the instruction register(106) and outputs addresses corresponding to the instructions in an execution step. A programmable control unit(102) outputs control signals corresponding to the addresses inputted from the instruction decoder(104). A register file(110) is a group of registers to temporarily store data or addresses. An interrupt controller(112) carries out the overall interrupt control of a microprocessor(100) in response to interrupt signals inputted from the external. An arithmetic logic unit(114) receives the control signals from the programmable control unit(102) and the data or addresses from the decoder(104) and carries out arithmetic logic operation. An extra address interface(120) is comprised of an extra program counter, an extra data address counter, a multiplexer and a latch circuit.
Patent KR-19990088539-A (KR)
Title: 직물용방충제
IPC: A01N53/06
Filed: 1999-05-25
Abstract: 직물을 먹어치우는 것을 특히 좋아하는 해충 (예, 특정한 나방) 을 효과적으로 방제하는 직물 보호제가 제공된다.     2,3,5,6-테트라플루오로-4-메틸벤질 3-(2-클로로-2-플루오로비닐)-2,2-디메틸시클로프로판카르복실레이트 또는 그의 이성질체를 활성 성분으로서 제공함으로써, 본 발명의 직물 보호제는 통상 본 발명의 직물 보호제로부터 처리된 직물로의 냄새의 전이를 막고, 제공된 직물 보호제로 인한 원하지 않는 직물의 변색을 방지하며, 상기와 같이 직물을 먹어치우는 것을 특히 좋아하는 해충을 신속하게 제거하고, 직물과 관련된 해충에 대한 잔류 효과를 제공한다.
Patent KR-20000074878-A (KR)
Inventor: LIM YUN BAE
IPC: B32B9/00
Filed: 1999-05-26
Abstract: PURPOSE: A method for producing mat is provided by transfer-printing patterns on a textile, therefor, the patterns are clear and products have high qualities. CONSTITUTION: The method comprises the steps of: adhering transfer paper closely to the textile attached on a cushion material; heat-pressing at 180-200°C for 10-30 seconds. The patterns of the transfer paper are printed on the textile by sublimation.
Patent KR-20010001114-A (KR)
Inventor: NAM JAE UK
IPC: A23B7/10
Filed: 1999-06-02
Abstract: PURPOSE: A kimchi storage container for a sink which is convenient for a homemaker to use is provided. Because it can be furnished inside the sink, it can save space, too. CONSTITUTION: The kimchi storage container for a sink is characterized by being comprised of: a sink body with a door at the front; a space formed at the upper part of the sink body, formed a plate(22) at the edge; a room having a cooling device at the center of the sink body, formed a storage container(30) wrapped with an insulating material on top; a cover(32) for the storage container(30); a device for keeping tight(33) between the storage container(30) and the cover(32); and a mounting case(31) for fixing the storage container(30) and discharging water in the plate(22).
Patent KR-20000006123-A (KR)
Inventor: OGAWADADAHIKO
IPC: H03K19/00
Filed: 1999-06-11
Abstract: PURPOSE: A semiconductor integrated circuit is provided to solve a problem originated from a through-current occurring in transition period between an active mode and a sleep mode. CONSTITUTION: A semiconductor integrated circuit comprises a high speed bus driver coupled bus lines, and a bur receiver. The high speed bus driver enters an active mode driving power from a positive power supply line and a virtual ground line, and a sleep mode cutting off the virtual ground line from a ground line to reduce power consumption. In a transition period between the active mode and the sleep mode, and the sleep mode, a switching circuit is coupled between the high speed driver and the bus line to cut off the bus line from the high speed driver, so that a through-current originated from a leakage current can be cut off.
Patent KR-20010002300-A (KR)
Inventor: KIM YEONG IL
IPC: B23K9/10
Filed: 1999-06-14
Abstract: PURPOSE: A method for checking an expulsion of a spot welder is provided to accurately check the expulsion using a dynamic resistance value. CONSTITUTION: First, the dynamic resistance value of a spot welder is sensed during welding. Then, the probability of the expulsion is detected with the variation of a dynamic resistance value from the next cycle after detecting a maximum value to a final conductive cycle. When the probability of the expulsion is more than a predetermined value, a system decides whether the expulsion happens or not. Then, the expulsion is accurately checked with using the dynamic resistance value.
Patent KR-19990068783-A (KR)
Title: 철근간격유지구
Filed: 1999-06-19
Abstract: 본 발명은 건축물의 옹벽을 구축할 경우에 철근이 거푸집과 일정한 간격으로 유지되어서 콘크리트 타설시에 철근이 정위치에 시공되도록 하기 위하여 사용되는 철근 간격유지구에 관한 것으로서, 더욱 상세하게는 거푸집판넬의 내측에 설치되는 수직철근과 수평철근의 교차부위에 한번 끼워지면 빠지지 않도록 끼워지면서, 콘크리트를 타설시에는 콘크리트의 유입이 용이한 구조로 철근 간격유지구가 형성되어서, 콘크리트 타설시에 철근이 정위치에 위치할 수 있으면서 거푸집의 내측으로 콘크리트가 충분히 채워져서 공동현상이 발생되지 않도록 하기 위한 것이다. 
     이를 위하여 본 발명은, 수직철근(1)과 수평철근(2)의 교차부위에 설치되어 수직철근(1)과 수평철근(2)이 거푸집(3)과 일정한 간격을 유지되도록 하는 철근 간격유지구에 있어서, “Ｓ”자 형태로 형성된 내측지지대(6)의 상하측에는 각기 반대방향으로 개구부를 구비한 원호형태의 수평철근 지지홈(5)을 형성하되, 상부측 수평철근 지지홈(5)이 하부측 수평철근 지지홈(5)보다 내경이 작게 작게 형성되고, 상기 내측지지대(6)의 외부 양측에는 내측지지대(6)의 상하측 수평철근 지지홈(5)과 동일한 원호홈부를 구비한 “Ｓ”자 형태의 외측지지대(7)를 내측지지대(6)와 일체로 각각 형성하되, 각각의 수평철근 지지홈(5)에 대응하는 삽입개시부(8)가 수평철근 지지홈(5)의 개시부 선단부보다 소정의 길이만큼 길게 형성되고, 각각의 원호홈부에는 수평철근 지지홈(5)으로 삽입된 수평철근(2)의 이탈을 방지하는 이탈방지편(9)이 각각 형성되고, 삽입개시부(8) 반대측의 날개부(10)는 상부측 날개부(10)의 길이가 하부측 날개부(10)의 길이보다 짧게 형성되며, 양측 외측지지대(7)의 상하부 양측 날개부(10)의 내측면에는 양측 외측지지대(7)의 내측 수직철근 지지공간부(11)로 삽입된 수직철근(1)의 이탈을 방지하는 이탈방지편(12)이 각각 형성된 것을 특징으로 한다.
Patent KR-20000006492-A (KR)
Inventor: KIKIMASATO
IPC: G11C11/407
Filed: 1999-06-26
Abstract: PURPOSE: The memory device having a direct sense circuit is provided to use commonness column decoder and sense buffer circuit in a plurality of memory block. CONSTITUTION: In the memory device having a direct sense circuit, when a memory block 0 is activated a direct sense activation circuit 20 which composed against sense circuit line 12A activate a direct sense operating line to answer an activated lead bus line of a control circuit. The plurality of memory block arrayed perpendicular to a sense circuit column. The plurality of memory block located between the column decoder 13 and the sense buffer circuit 15 and located a word decoder 11 at an edge side.
Patent KR-20010009495-A (KR)
Inventor: JO IN HO
IPC: B41J2/00
Filed: 1999-07-10
Abstract: PURPOSE: A digital copier provided with a recording and reproducing means of a manuscript content is to allow the digital copier to have a data recording means capable of storing the manuscript content, thereby making it possible to reproduce data recorded in the data recording means using another reproducing means. CONSTITUTION: A digital copier provided with a recording and reproducing means of a manuscript content comprises: a scanner(13) for reading in the content of a manuscript(14); a memory(12) for storing a digital data read in by the scanner; a developing unit(15) for charging the digital data stored in the memory on a drum to transfer the digital data onto a printing paper; a system controller(10) for controlling all operations of the digital copier; a data interface unit(17) for extracting the digital data stored in the memory to the outside and transmitting manuscript content digital data input from the outside to the memory; and a read/write unit(18) for storing the manuscript content digital data extracted by the data interface unit in storing mediums(19,20,21) and transmitting the manuscript content digital data stored in the storing medium to the data interface unit.
Patent KR-20010010266-A (KR)
Inventor: LEE JONG IN
IPC: G03B29/00
Filed: 1999-07-16
Abstract: PURPOSE: A camera exclusively for vehicle accidents is provided to take a photograph with a disposable camera automatically in a short time by operating a flash function quickly and manually by rotating a motor by 360 degrees according to an instruction of an incorporated program. CONSTITUTION: A camera exclusively for vehicle accidents includes an impact sensor mounted in the vehicle to generate a signal in case of collision of the vehicle, a disposable camera for taking a photograph, a small-sized geared motor(M1) for stopping a film to take a photo automatically by a control program, an OTP IC semiconductor chip for dividing a place, unable to take a photo under the state that the film is moving, to a short pulse counter to take a photograph, a small-sized geared motor(M2) for rotating 360 degrees to take a photograph manually, and a semicircular cap for surrounding the components to serve as a safety element.
Patent KR-20010010343-A (KR)
Inventor: KANG SEONG WON
IPC: H03G3/30
Filed: 1999-07-19
Abstract: PURPOSE: A gain controlled amplifier is provided to make a control width be wider and to prevent a degradation of a power characteristics using a two-stage active feedback circuit that uses a drain common field effect transistor. CONSTITUTION: An amplifier part(220) has the first input terminal(201) that inputs an exterior signal, the first to third capacitor(202,204,205) and the first and second field effect transistor(203,206). The amplifier part(220) amplifies and outputs the input signal with two-stage. A feedback part(230) has an output terminal to which the amplified signal is output and the second input terminal(209) which a bias is inputted to. The feedback part(230) has the forth and fifth capacitor(208,213) and the third field effect transistor(210) having a source and drain connected to a load(211,212). The feedback part(230) feedbacks a part of the signal output to the output terminal(207) to the amplifier part(220) when the high bias is inputted through the second input terminal(209).
Patent KR-20010010994-A (KR)
Inventor: KIM JE YUN
IPC: H01M10/0566
Filed: 1999-07-24
Abstract: PURPOSE: A non-aqueous electrolyte solution for a battery is provided to improve a charge and discharge life performance of a battery by detecting an electrochemistrical stable compound and detecting an adding amount having an optimal performance. CONSTITUTION: A non-aqueous electrolyte solution includes an organic solvent obtained by adding at least one of 0.01-10wt% selected from an ethylenetrithiocarbonate or induction material to a non-aqueous electrolyte solution for a lithium battery having an organic solvent and a lithium salt.
Patent KR-20010017636-A (KR)
Inventor: KIM JAE HWAN
IPC: A23K1/18
Filed: 1999-08-13
Abstract: PURPOSE: A method for producing egg that contains natural astaxanthin having antioxidative and physiologically active effect, EPA and DHA is provided to get a functional egg product in high yield with low cost. CONSTITUTION: The egg is produced by adding 0.01-50wt% of dried natural astaxanthin extracted from krill by dissolving the shrimp with enzyme to feed of layer, based on the weight of the feed, and giving the feed containing the astaxanthin to layers. The liposoluble astaxanthin is mixed with 0.1-10wt% of oil and fat to be absorbed into the inside body of the layer well. The oil and fat extracted from the insides of cuttlefish or bean curd including tuna containing EPA(Eicosapentaenoic acid) and DHA (Docosahexaenoic acid) promote the coloring effect of the yolk and reduce the color deviation.
Patent KR-20010018725-A (KR)
Inventor: BAE BYEONG SEONG
IPC: G02B6/00
Filed: 1999-08-21
Abstract: PURPOSE: A method for controlling the optical power of an optical waveguide flat display panel is provided which controls the size of each of a plurality of gray-scale electrodes or adds a light reflecting structure to improve efficiency of gray scale display of the flat display panel. CONSTITUTION: The optical power of an optical waveguide flat display panel is controlled using an electro-optic material(330) whose refractive index is varied by electric field and multiple electrodes in order to modulate the intensity of rays of light going along an optical waveguide(320). On the basis of an area from which rays of light propagated along the optical waveguide in parallel are reflected by the electro-optic material, the area of the first gray-scale electrode(351) is half the area such that the voltage of the first electrode is controlled to make rays of light corresponding to half the area escape from the first electrode. The second gray-scale electrode(352) corresponds to half an area from which rays of light that were not escaped from the first electrode are reflected at the boundary between the electro-optical material. A plurality of opposite electrodes(300) are formed at locations opposite to the plurality of gray-scale electrode. A voltage is applied to at least one gray-scale electrode and one opposite electrode.