baber/WOPTO huggingface dataset:
Patent KR-20030044666-A (KR)
Title: Organic electro-luminescence panel
Inventor: BAE HO GI
IPC: H05B33/10
Filed: 2001-11-30
Abstract: PURPOSE: An organic electroluminescence panel is provided to improve the performance of hole injection by coating a mono-chlorobenzene on surfaces of an insulating layer and a separator of a cathode. CONSTITUTION: An ITO(Indium Tin Oxide) layer(20) is provided on a glass substrate(10). A positive photoresist(30) is provided on the ITO layer(20) through a spin coating. An MCB(Mono-ChloroBenzene)(50) is provided on the positive photoresist(30) through the spin coating. After baking at 110°C, a mask(90) is provided over the MCB(50) and exposing and developing are sequentially performed. Then, a desired insulating layer is formed. A negative photoresist is coated and an MCB(60) is coated on the negative photoresist through the spin coating. After exposing, developing, and curing, a cathode wall(40) is formed. The MCBs(50,60) provided on the insulating layer(30) and the cathode wall(40) serve as protective layers.
Patent KR-20030044687-A (KR)
Title: Digital broadcasting display device and operating method thereof
Inventor: KIM IK JU
IPC: H04N5/445
Filed: 2001-11-30
Abstract: PURPOSE: A digital broadcast displaying system and a method for operating the system are provided to display the kind of a received data broadcast to allow a user to easily decide whether or not the user watches the data broadcast. CONSTITUTION: A digital broadcast displaying system(200) includes a user display setting unit(210), a data broadcast informing controller(220), and an image display(230). The user display setting unit receives the kind of a data broadcast in which a user is interested from the user, and stores information about the kind of the data broadcast. The data broadcast informing controller judges the kind of a received data broadcast and compares the kind of the received data broadcast with the kind of the data broadcast stored in the user display setting unit, to control whether or not the user is informed of the reception of the data broadcast. The image display displays the receiving state of the data broadcast.
Patent KR-20030045875-A (KR)
Title: Broadcasting Control System and Method by Network
Inventor: KIM SEUNG BEOM
IPC: H04N7/14
Filed: 2001-12-03
Abstract: PURPOSE: A broadcast control system and method using a network are provided to allow a producer to connect with the network through his terminal to correct the contents of his program. CONSTITUTION: A broadcast control system using a network includes an edition server(10), at least one terminal(40), a data server(30), and a transmission server(20). The edition server stores and provides web pages and editing software for producing and correcting programs. A producer or operator connects with the edition server through the network, produce, edits and corrects a program using the terminal. The data server is connected to the edition server and stores normalized data files and program contents. The transmission server receives data from the edition server and data server and automatically transmits the data to a main console.
Patent KR-20030047589-A (KR)
Title: The method of increasing yield of calcium when it is inputted into deoxygenized melting steel
Inventor: CHOI IN SEOP
IPC: C21C7/04
Filed: 2001-12-11
Abstract: PURPOSE: A method capable of securing the same level of molten steel cleanliness as conventional method and obtaining superior cost reduction effect by effectively increasing actual yield of calcium fed into molten steel and improving cleanliness of molten steel when manufacturing aluminum and calcium added molten steel is provided. CONSTITUTION: In a method for improving actual yield of calcium when manufacturing steel containing 0.04 to 0.60 wt.% of C, 0.005 to 0.060 wt.% of Al, 1.0 to 2.0 wt.% of Mn, and 5 to 50 ppm of Ca, the method for improving actual yield of calcium comprises first process of feeding calcium wire into molten steel; and second process of performing post-reflux after feeding the calcium wire into molten steel, wherein a feeding amount of calcium is adjusted by the following expression 1 according to temperature of molten steel when feeding calcium into molten steel in the first process of feeding calcium wire into molten steel:£Expression 1|Y=0.1xX-143, where Y has a unit of kg-Ca/min as calcium feeding amount per minute, X has a unit of deg.C as temperature of molten steel during feeding of calcium, 0.1 has a unit of kg-Ca/min·deg.C, and 143 has a unit of kg-Ca/min.
Patent KR-20030051012-A (KR)
Title: Apparatus for diffusing spacer
Inventor: KIM SANG HYEON
IPC: G02F1/1339
Filed: 2001-12-20
Abstract: PURPOSE: A spacer sprayer is provided to spray spacers uniformly and reduce a period of time required for a spacer spraying process. CONSTITUTION: A spacer sprayer includes a spacer spray chamber(62) and a plurality of spray nozzles(72a,72b). The spray nozzles are arranged in at least two rows on a substrate(61) to spray spacers onto the substrate. The substrate is moved while the spacers are sprayed on to the substrate. The spacer sprayer further includes a plurality of driving rollers(80) that are set inside the spacer spray chamber to move the substrate. The spray nozzles are arranged zigzag.
Patent KR-20030056936-A (KR)
Title: Apparatus and method for operating memory
Inventor: JUNG U CHEOL
IPC: G06F12/00
Filed: 2001-12-28
Abstract: PURPOSE: A device and a method for operating a memory are provided to store a program in a program memory according to a use frequency used by a processor, and to offer the program to the processor. CONSTITUTION: An external memory(400) previously stores the program needed when an MPEG(Moving Picture Experts Group) decoding chip decodes the image data compressed by the MPEG, and offers the stored program to an MPEG decoding chip(300). The MPEG decoding chip(300) comprises a decoding hardware(310) decoding the MPEG image data, an interface logic(320) interfacing the digital image data with the outside, the program memory(330) downloading and storing the program stored in the external memory(400), the processor(340) decoding the MPEG image data by controlling the decoding hardware(310) while requesting and receiving the program stored in the program memory(330), and a memory manager(350) downloading the program previously stored in the external memory(400) to the program memory(330) and offering the program to the processor(340).
Patent KR-20030058509-A (KR)
Title: A semiconductor memory device which enables a word line using column decoding information, and driving method thereof
Inventor: KIM GWAN EON
IPC: G11C8/08
Filed: 2001-12-31
Abstract: PURPOSE: A semiconductor memory device capable of enabling the word line by using the column decoding information and a method for driving the same are provided, which dose not require much time and large current consumption in enabling the word line by only one word line driving circuit. CONSTITUTION: A semiconductor memory device capable of enabling the word line by using the column decoding information includes a memory cell array made of a plurality of sub cell mats, a column decoder(306) and a word line driving circuit(302). In the semiconductor memory device, the column decoder(306) generates a column decoding information from the address signal applied from outside. And, the word line driving circuit(302) enables only the word line of the corresponding sub cell mat among the plurality of the cell mats by using the column decoding information.
Patent KR-20010072842-A (KR)
Title: 토양 또는 암석에 구멍을 드릴링하고 배수하기 위한 장치
IPC: E02D3/10
Filed: 1999-08-20
Abstract: 본 발명은 드릴링, 특히 진동 또는 회전-진동 드릴링 장치(1)에 관한 것이다.  드릴 로드(4)에 장착된 드릴비트(2,3)는 보어 구멍을 형성하고 재킷튜브(6)는 드릴 로드(4) 또는 드릴비트(2,3)에 연결된다.  드릴비트(2,3)에 인접한 영역에서, 재킷튜브(6)는 드릴 로드와 재킷튜브사이에 구현된 고리형 공간 내로 통하는 적어도 하나 이상의 구멍을 가진다.  드릴비트(2,3)에 인접한 단부 영역에서, 재킷튜브(6)는 재킷튜브의 둘레에 균등하게 분배된 다수의 통과 구멍 또는 슬릿(8)을 가진 적어도 하나 이상의 필터 튜브(7)에 의해 둘러싸인다.  이것은 간단한 기구에 의해 보링되는 동안 확실한 배수 및 이에 상응하는 안전성을 가능하게 한다.
Patent KR-20010075663-A (KR)
IPC: H01L21/308
Filed: 1999-10-29
Abstract: 본 발명은 액체내 용해 가스의 농도를 정확히 설정 및 유지하는 방법 및 시스템(10)에 관한 것이다. 보다 구체적으로, 본 발명은 원하는 가스를 충분한 농도로 포함하는 가스 혼합물(18)을 사용하여 액체에 용해된 원하는 농도의 가스, 즉  "정합 가스(matched gas)"와 평형을 이루게 하고, 원하는 농도의 가스를 함유하는 액체 혼합물을 제조함으로써 액체내 용해 가스의 농도를 정확히 설정 및 유지하는 방법 및 시스템에 관한 것이다. 상기 방식으로, 본 발명의 방법 및 시스템은 엄격한 시방서에 따라 적용되는 용도에 적합한 정확한 양의 용해 가스를 포함하는 액체 혼합물을 제조할 수 있고, 나아가 실질적으로 용해 가스의 손실없이 상기 제조된 액체 혼합물을 사용 지점에 송달할 수 있다.
Patent KR-20010113642-A (KR)
IPC: A61K47/36
Filed: 2000-01-06
Abstract: The present invention relates to the enhancement of the efficacy of drugs, and more particularly, with overcoming the resistance of cells or organisms to drugs. In particular, the present invention provides a method for enhancing the effectiveness of a cytotoxic or anti-neoplastic agent, comprising the step of co-administering said agent with hyaluronan, wherein co-administration with hyaluronan enhances the agent's cancer cell-killing potential.
Patent KR-20010105387-A (KR)
Title: 계층적 전송을 이용한 인터넷 방송 시스템 및 인터넷 방송방법
Inventor: HWANG JUN
IPC: H04L45/16
Filed: 2001-01-17
Abstract: 본 발명은 계층적 전송을 이용한 인터넷 방송 시스템 및 인터넷 방송 방법에 관한 것으로, 본 발명에 의한 인터넷 방송은 소정 갯수의 단말기가 접속할 수 있도록 하고, 상기 소정 개수를 초과하는 접속 시도 단말기들은 서버 또는 단말기에서 하위 단말기들로 접속을 유도하여 항상 같은 속도로 데이터를 전송받을 수 있도록 하여 서버의 용량을 증가시키지 않고도 통신 부하 없이 대용량의 방송 서비스가 가능하도록 한다. 
     본 발명은 서버를 최상위로 하고 서버에 접속되는 단말기의 수를 한정하고, 한정된 수 이상의 단말기가 접속을 요청할 경우 이미 접속되어 있는 하위 단말기들중 어느 한 단말기로 접속을 유도하여 접속되어 있는 단말기들이 데이터 전송의 중계기 역할을 하게 함으로써 서버 용량의 증가 없이도 원하는 모든 인터넷 방송 이용자들에게 양질의 방송을 제공할 수 있는 효과가 있다. 
     또, 본 발명에 따른 분산 IP 멀티캐스팅을 이용한 인터넷 방송 시스템 및 인터넷 방송 방법은, 인터넷 방송용 서버에 매우 적은 수의 단말기에게만 직접 데이터를 송신하면 되므로 서버의 통신 부하를 매우 줄일 수 있을 뿐만 아니라 IP 멀티캐스팅을 이용하여 방송을 수신할 수 있는 단말기의 숫자를 대폭적으로 늘일 수 있다.
Patent KR-20010113777-A (KR)
Title: A method for setting a transmission quality target value for power control in a mobile radiocommunication system
IPC: H04W52/24
Filed: 2001-01-29
Abstract: A method for setting a transmission quality target value for power control in a mobile radiocommunication system, a method wherein:  an offset is applied in an anticipated way to said transmission quality target value to compensate for the effects of a compressed mode whereby transmission is interrupted during transmission gaps in compressed frames, and the transmission rate is correspondingly increased to compensate for said transmission gaps, said offset includes a first component intended to compensate for the effects of said transmission rate increase, and a second component intended to compensate for the effects of said transmission gaps, said transmission rate increase applies not only for a compressed frame but for a plurality of frames including said compressed frame, and said second component is not applied for all frames of said plurality of frames, but only for said compressed frame and/or for at least one frame, or recovery frame, following said compressed frame.  <IMAGE>
Patent KR-20020035489-A (KR)
IPC: H01L23/522
Filed: 2000-06-08
Abstract: 본 발명은 집적회로 디바이스와 같은 마이크로 전자 디바이스 구조의 형성에 관한 것이다. 더욱 상세하게는, 본 발명은 다중 저유전체 상수 금속간 유전체를 사용하여 비아의 형성 및 금속 및 와이어링 라인의 연결에 관한 것이다. 본 발명에서는 집적회로의 Cu 기반 듀얼 다마슨공정의 후처리의 금속간 유전체로서 상이한 2개 이상의 저-k 유전체를 사용한다. 유기 및 무기의 저-k 유전체의 사용은 2 종류의 유전체의 플라스마 에칭 특성이 매우 다르기 때문에 여러가지 장점을 제공한다. 
     하나의 유전체가 다른 유전체를 에칭하는데 에칭스톱으로 작용하여, 추가적인 에칭스톱이 필요하지 않게 된다. 저-k 유전체를 사용하기 때문에 기생 용량이 작아지기때문에 탁월한 성능이 얻어진다. 
     본 발명의 집적회로 구조는, 기판; (a) 상기 기판 위에 금속 라인의 패턴과, 상기 금속 라인 사이의 기판 위에 무기 유전체를 갖는 상기 기판 위의 무기층; 및 (b) 상기 무기층의 금속 라인에 연결된, 금속으로 채워진 비아를 갖는 유기 유전체를 갖는 무기 유전체 위의 유기층을 포함한다.
Patent KR-20020030279-A (KR)
IPC: B32B7/02
Filed: 2000-06-13
Abstract: 흡수층 (2) 및 이 흡수층 (2) 과 접촉하는 내절단성 재료를 포함하는 다목적 시트재.     내절단성 재료는, 예컨대 흡수층에 형성된 내절단성 지지 요소 (1) 와 같은 내절단성 지지계를 포함할 수 있다.     내절단성 재료는, 예컨대 평균 크기가 약 100 ㎛ 이상인 폴리머 입자과 같은 내절단성 입자들을 선택적으로 포함할 수도 있다.     바람직하게는, 시트재의 흡수 효율이 약 0.2 이상, 내슬라이스성이 약 30 kgf/cm 이고, 보다 바람직하게는 흡수 효율이 약 1.0 이상, 내슬라이스성이 약 40 kgf/cm 이다.     또한, 시트재는 내절단성이 약 30 kgf/cm 이상, 흡수 효율이 약 0.2 이상이고, 습식 마모 손실이 약 400 mg/100 회전 미만인 것이 바람직하다.
Patent KR-20030002294-A (KR)
IPC: C12N9/12
Filed: 2000-06-23
Abstract: 본 발명은 코리네박테리움 글루타미쿰 ( Corynebacterium glutamicum )으로부터 신규 SMP 단백질을 코딩하는, SMP 핵산 분자로 명명된 단리된 핵산 분자를 기재한다.  또한, 본 발명은 안티센스 핵산 분자, SMP 핵산 분자를 함유하는 재조합 발현 벡터, 및 상기 발현 벡터가 도입된 숙주 세포를 제공한다.  또한, 본 발명은 단리된 SMP 단백질, SMP 단백질 돌연변이, 융합 단백질, 항원성 펩티드, 및 코리네박테리움 글루타미쿰에서 SMP 유전자의 유전 공학을 기초로 하여 상기 생물체로부터 목적하는 화합물의 생산을 향상시키는 방법을 제공한다.
Patent KR-20030059898-A (KR)
Inventor: KIM SEUNG CHEON
IPC: F24F1/00
Filed: 2002-01-03
Abstract: PURPOSE: A structure for installing motor of ceiling type air conditioner is provided to offer a structure of a cabinet enduring impact load generated by vibration of a motor. CONSTITUTION: A motor is mounted and fixed on a motor mount(3). The motor mount is fixed on a cabinet(21) by a coupling member comprising a bolt(6) and a nut(17). A plurality of coupling holes are formed on the cabinet. Insertion holes are formed on the motor mount correspondingly with the coupling holes of the cabinet. A vibration absorbing member(5) is installed on the insertion hole of the motor mount. The bolt penetrates a penetrating hole formed on the vibration absorbing member. The vibration absorbing member is formed with rubber or silicon. Diameter of the coupling hole of the cabinet is approximately same with diameter of the bolt. Diameter of the insertion hole of the motor mount is larger than the diameter of the bolt. Diameter of the vibration absorbing member is gradually reduced from a center in longitudinal direction to one end thereof. A coupling groove(5a) is formed near the center. A shock absorbing groove(5b) is formed between the coupling groove and the other end of the vibration absorbing member to be depressed inwardly. A stiffness reinforcing groove(21a) is formed around each of the coupling groove of the cabinet in annular shape to improve stiffness of the cabinet.
Patent KR-20030059982-A (KR)
Inventor: AHN JUN GI
IPC: H04B7/005
Filed: 2002-01-05
Abstract: PURPOSE: A method for controlling a power for ACK/NACK signal in an automatic repeat request system is provided to control a power level of ACK/NACK to be transmitted to a transmitter side according to a result which a receiver side judges quality of a received signal. CONSTITUTION: A wireless packet communication system receives packet data and judges quality of the received signal, and transmits ACK/NACK signal to a transmitter side. According to contents of the ACK/NACK signal, a transmission power level of the ACK/NACK signal is controlled. The ACK/NACK signal includes information indicating that a transmission signal is received or not. A transmission power of a signal of the information indicating that the transmission signal is not received is set to be less than that of the information indicating that the transmission signal is received.. The transmission power of a signal of the information indicating that the transmission signal is not received has a transmission power level corresponding to an error rate limit which a system requests.
Patent KR-20020025906-A (KR)
Title: A none electromagnetic wave heat controler for an electric heating bedding
Inventor: DO TAE HOON
IPC: H05B1/02
Filed: 2002-01-12
Abstract: PURPOSE: A non-electromagnetic wave temperature controller for an electric heater is provided to eliminate an electromagnetic wave generated in an electric heater by providing an electromagnetic wave generation preventing circuit in the internal of a temperature controller. CONSTITUTION: An AC(Alternating Current) power is connected to a temperature controller(100) through a terminal(1). A current outputted from the temperature controller(100) is supplied to an electric heater frame(3) through a connection hole(2). An integrated circuit(LLLD4422 chip)(4) for eliminating an electromagnetic wave and controlling temperature has NE555. A light emitting diode(LED) and a resistor(R2) are serially connected to an output terminal of NE555 to supply a gate turn-on voltage of a silicon control rectifier(SCR). The connection hole(2) is comprised of connection pins(C11,C22) connected to a heat generation line(5) and connection pins(C12,C21) connected to a thermoresponsive line(6). The connection pins(C21,C22) of the connection hole(2) are connected in an internal of LLLD4422 chip(4).
Patent KR-20030061930-A (KR)
Title: Hose connecting
Inventor: KIM CHANG HUN
IPC: F16L3/00
Filed: 2002-01-12
Abstract: PURPOSE: A hose connector is provided to fix the hose connector on the ground by integrally forming a hose connector body with a support fixing unit. CONSTITUTION: A hose connector(100) is composed of a hose connector body(101) having a passage(140). A support fixing unit(130) formed at the hose connector body is fixed on the ground, and has various shapes. A handle(120) is formed at the hose connector body, and has various shapes.
Patent KR-20030064447-A (KR)
Title: Device for controling weight of training device
Inventor: LEE BYUNG DON
IPC: A63B21/062
Filed: 2002-01-28
Abstract: PURPOSE: A weight adjusting device of a weight training apparatus is provided to know and adjust the weight of stacks with ease and prevent a safety accident by stably maintaining a coupling state of the stacks and a fixing bar by a fixing device. CONSTITUTION: A guide(420) is installed to a plate(210) connected to a wire(503) so that a user of a weight training apparatus easily adjusts the weight of stacks(310) suitable for its physical aptitude. A vertically slidable fixing device(100) is mounted along the guide so that the user stops at a desired position of the stacks to make fixing device engaged to the stacks. Thus the user overcomes the inconvenience occurred when a fixing tool is inserted into the hole of the stacks.
Patent KR-20020065865-A (KR)
Title: Antenna apparatus
Inventor: IMAGAWA TOSHIYUKI
IPC: H01Q1/38
Filed: 2002-02-07
Abstract: PURPOSE: An antenna apparatus is provided to reduce a size and to widely increase a bandwidth. CONSTITUTION: An antenna apparatus comprises a substrate(10), a chip antenna(12) mounted on the substrate(10), and a ground pattern(18) disposed on the substrate, at least a portion on the side of a power supply terminal(26) of an antenna conductor(22) in the chip antenna(12) being overlapped with the ground pattern.
Patent KR-20030071423-A (KR)
Title: Temperature measurement of spreading-room
Inventor: HONG GI HO
IPC: G01K7/02
Filed: 2002-02-28
Abstract: PURPOSE: A contact-type temperature measuring method is provided to reduce a measuring cost caused by an additional processing for an engine part and to freely measure the temperature in a combustion chamber of an engine. CONSTITUTION: A thermocouple(1) is inserted into an engine part(7) through a safety valve hole(9b) formed in the engine part(7). The thermocouple(1) is fixed to a measuring point(8b) formed in the engine part(7). Then, the safety valve hole(9b) is blocked by an adapter(10) from an exterior of the engine part(7). After operating the engine part(7), a temperature of a combustion chamber of the engine part(7) is measured. When fixing the thermocouple(1) to the measuring point(8b) of the engine part(7), a stopper(11) is used for fixing the thermocouple(1) to an inner part of the engine part(7).
Patent KR-20030074012-A (KR)
Title: Apparatus for Treatment of Wastewater having Bioreactor with Nonwoven Fabric Filter and a Method for Treatment thereby
Inventor: BAE MIN SU
IPC: C02F3/30
Filed: 2002-03-15
Abstract: PURPOSE: Provided are a wastewater treatment apparatus with a bioreactor having non-woven fabric filter and a wastewater treatment method using the same apparatus. CONSTITUTION: The apparatus comprises a bioreactor(100) with a wastewater inlet and an air vent at an upper portion thereof, and a treated water outlet at the bottom thereof, and a non-woven fabric filter bag(101) installed in the bioreactor(100) in such a way that the filter bag is separated from inner side surfaces of the bioreactor(100), wherein the filter bag(101) has an opening at an upper portion thereof and a closed lower end, and an air diffuser(102) provided at a lower portion of the filter bag(101) for aeration in the bioreactor(100). The method comprises the steps of inputting solution mixture containing microorganism into the bioreactor with the non-woven fabric filter bag therein, culturing the microorganism while supplying air to the bioreactor, inputting wastewater at a constant flow rate, and removing nitrogen and phosphorous in the wastewater by microorganism under aerobic or anaerobic condition.
Patent KR-20030076811-A (KR)
Title: A natural dye and method for dyeing such dye
Inventor: KIM YOUNG JA
IPC: C09B61/00
Filed: 2002-03-21
Abstract: PURPOSE: Provided is a natural dye for five half-toned color dyeing, which can be commercialized as it is, and by which the five half-toned color dyeing can be performed easily only by using a different mordant. A method of dyeing with five half-toned color using the natural dye is also provided. CONSTITUTION: The natural dye for five half-toned color dyeing comprises 10 to 20 wt% of Caesalpiniae Lignum, 10 to 70 wt% of Gardeniae fructus and 10 to 70 wt% of Curcumae tuber, in a finely chopped or ground state. The natural dyeing method comprises the steps of forming the natural dye, boiling the dye in water to obtain a dye bath and adding a material to be dyed into the dye bath, warming to perform dyeing, and then adding a suitable mordant selected from the group consisting of iron, potassium bichromate, alum and alum mixed with iron into the dye bath with warming to perform mordanting.
Patent KR-20030075951-A (KR)
Title: Heating apparatus for adhesion
Inventor: SIN HYUN WOO
IPC: D04H1/60
Filed: 2002-03-22
Abstract: PURPOSE: A non-woven fabric bonding-heating device of a roll back gluing machine is characterized by coating a back of non-woven fabric with an adhesive and preheating the non-woven fabric on an adhesive heating rod, a heating rod and a heating roller. The non-woven fabric bonding-heating device of the roll back gluing machine is capable of using thin non-woven fabric, reducing a production cost, drying rapidly the adhesive and reducing a drying time. CONSTITUTION: The non-woven fabric bonding-heating device of the roll back gluing machine is comprised of: the adhesive heating rod(210) containing the adhesive and heating the adhesive; a bonding box(200) containing the adhesive heating rod(210); a rotating roller(300) which is installed on an upper part of the bonding box(200), coating the back of the non-woven fabric(100) transferred from a winding roll(120) with the adhesive and heating the fabric with the heating rod(310); and the heating roller(400) heating first the non-woven fabric just before a drying chamber(500).
Patent KR-20030077192-A (KR)
Title: Power saving mode control method for display
Inventor: KANG HUI JIN
IPC: H04N5/63
Filed: 2002-03-25
Abstract: PURPOSE: A method for controlling a power-saving mode of a video display device is provided to forcibly enter or release a power-saving mode by controlling power or a power-saving mode according to a time inputting a power switch. CONSTITUTION: If a user inputs a power switch(102), a microprocessor(100) counts a power switch input time. If the user orders entering a power-saving mode by continually inputting the power switch input time, the microprocessor checks input states of horizontal and vertical synchronous signals. If the horizontal and vertical synchronous signals are inputted, the microprocessor controls a power-saving control unit(106) for forcibly converting a mode of a monitor into the first power-saving mode. If both horizontal and vertical synchronous signals are not inputted, the power-saving control unit converts the mode of the monitor into the second power-saving mode. If the user inputs the power switch, the microprocessor controls the power-saving control unit for converting the mode of the monitor into a normal mode.