KR100728829B1 - High brightness back light apparatus of vehicle - Google Patents

High brightness back light apparatus of vehicle Download PDF

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Publication number
KR100728829B1
KR100728829B1 KR1020050030197A KR20050030197A KR100728829B1 KR 100728829 B1 KR100728829 B1 KR 100728829B1 KR 1020050030197 A KR1020050030197 A KR 1020050030197A KR 20050030197 A KR20050030197 A KR 20050030197A KR 100728829 B1 KR100728829 B1 KR 100728829B1
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South Korea
Prior art keywords
vehicle
light source
source unit
voltage
switching
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KR1020050030197A
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Korean (ko)
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KR20060108078A (en
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백영문
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(주)다보컴
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/30—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0088—Details of electrical connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

본 발명은 차량의 등화장치에 관한 것으로, 특히 다수의 발광다이오드를 직병렬 접속하여 미등을 구성함으로써, 고광도 및 내구성의 향상을 실현한 차량용 미등장치에 관한 것이다. 이를 위해 본 발명은 차량용 미등장치에 있어서, 직병렬로 접속된 다수의 발광다이오드(LED)로 이루어진 광원부(200)와; 배터리로부터 인가되는 전압을 소정 크기의 전압으로 변환하여 상기 광원부(200)로 공급하는 파워 컨버터(100)를 구비하는 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lighting apparatus, and more particularly, to a vehicle taillight apparatus that realizes high brightness and improved durability by constructing a taillight by connecting a plurality of light emitting diodes in parallel and in parallel. To this end, the present invention provides a taillight device for a vehicle, comprising: a light source unit (200) consisting of a plurality of light emitting diodes (LEDs) connected in series and parallel; It is characterized in that it comprises a power converter 100 for converting the voltage applied from the battery to a voltage of a predetermined size and supplying to the light source unit (200).

미등, 발광다이오드, 광도, 내구성 Taillight, Light Emitting Diode, Brightness, Durability

Description

차량용 고광도 미등장치{HIGH BRIGHTNESS BACK LIGHT APPARATUS OF VEHICLE}HIGH BRIGHTNESS BACK LIGHT APPARATUS OF VEHICLE}

도 1은 본 발명에 따른 미등장치를 나타낸 회로도.1 is a circuit diagram showing a taillight device according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100 : 파워 컨버터 200 : 광원부100: power converter 200: light source

F1 : 퓨즈 D1~D3 : 다이오드F1: fuse D1 ~ D3: diode

U1 : 레귤레이터 C1~C3 : 캐패시터U1: Regulator C1 ~ C3: Capacitor

L1 : 인덕터 R1~R3 : 저항L1: Inductor R1 ~ R3: Resistance

LED : 발광다이오드 J1~J2 : 커넥터LED: Light Emitting Diode J1 ~ J2: Connector

본 발명은 차량의 등화장치에 관한 것으로, 특히 야간에 차량의 존재를 알려주는 미등을 다수의 발광다이오드로 구성함으로써, 고광도 및 내구성의 향상을 실현한 차량용 미등장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vehicle lighting device, and more particularly, to a vehicle taillight device that realizes high brightness and improved durability by constructing a plurality of light emitting diodes that inform the presence of a vehicle at night.

일반적으로, 차량에는 운전자의 시계확보를 위한 등화장치와 신호, 표식을 위한 등화장치가 장착되어 있다.In general, a vehicle is equipped with an equalizing device for securing a driver's field of view and an equalizing device for signaling and marking.

시계확보를 위한 등화장치로는 전조등, 안개등, 실내등, 후진등 등이 있으며, 신호, 표식을 위한 등화장치로는 방향 지시등, 미등, 번호등, 정지등 등이 있는데, 미등은 야간에 후속 차량에게 차량의 존재를 알려주기 위해 차량의 후방에 설치된다.Equalizers for securing the clock include headlights, fog lights, indoor lights, reversing lights, etc. Equalizers for signals and signs include turn signals, taillights, number lights, stop lights, etc. It is installed at the rear of the vehicle to indicate the presence of the vehicle.

따라서 주변의 밝기, 예를 들어 야간이나 차량이 터널 또는 지하 주차장내를 주행하는 경우에 운전자가 미등 스위치를 수동 조작하면 배터리의 전원이 미등으로 인가되어 미등이 점등하게 된다.Therefore, when the driver operates the taillight switch manually in the surrounding brightness, for example, at night or when the vehicle is traveling in a tunnel or an underground parking lot, the power of the battery is applied to the taillight and the taillight is turned on.

그러나 종래의 미등은 광원으로 전구를 이용하고 있는데, 이와 같은 전구는 그 광도가 낮아 시인성이 떨어질 뿐만 아니라 점멸에 따라 그 사용 수명도 저하되는 등의 문제점을 가지고 있다. However, the conventional taillight uses a light bulb as a light source, but such a light bulb has a problem that its light life is low and its visibility is not only lowered, but also its service life decreases as it blinks.

이에 본 발명은 상기와 같은 문제점을 해결하기 위해 발명된 것으로, 내구성이 우수한 다수의 발광다이오드로 미등을 구성함으로써, 고광도 및 내구성의 향상을 실현한 차량용 미등장치를 제공하는 것을 그 목적으로 한다.Accordingly, the present invention has been invented to solve the above problems, and an object of the present invention is to provide a taillight device for a vehicle that realizes high brightness and improved durability by constructing a taillight with a plurality of light emitting diodes having excellent durability.

상기와 같은 목적을 달성하기 위하여 본 발명은, 차량용 미등장치에 있어서,직병렬로 접속된 다수의 발광다이오드로 이루어진 광원부와; 배터리로부터 인가되는 전압을 소정 크기의 전압으로 변환하여 상기 광원부로 공급하는 파워 컨버터를 구비하는 것을 특징으로 한다.In order to achieve the above object, the present invention is a vehicle taillight device, comprising: a light source unit consisting of a plurality of light emitting diodes connected in parallel; And a power converter for converting the voltage applied from the battery into a voltage having a predetermined magnitude and supplying the voltage to the light source unit.

상기 파워 컨버터는, 배터리로부터 인가되는 입력 전압을 소정 크기의 전압으로 변환하는 스위칭 레귤레이터와; 상기 레귤레이터의 출력 전압을 스위칭 온 타 임 동안 축적하고, 스위칭 오프 타임 동안 상기 광원부로 인가하는 인덕터와; 상기 레귤레이터의 이득 조정용 귀환 저항; 및 스위칭 오프 타임 동안 상기 레귤레이터의 출력단을 접지시키는 쇼트키 다이오드를 포함하는 것을 특징으로 한다.The power converter includes: a switching regulator for converting an input voltage applied from a battery into a voltage having a predetermined magnitude; An inductor accumulating the output voltage of the regulator during the switching on time and applying the switching voltage to the light source during the switching off time; A feedback resistor for gain adjustment of the regulator; And a Schottky diode for grounding the output terminal of the regulator during a switching off time.

상기 파워 컨버터는, 배터리로부터 인가되는 입력 전압의 맥동 성분을 제거하는 입력측 평활 캐패시터와; 상기 인덕터의 출력 전압의 맥동 성분을 제거하여 상기 광원부로 인가하는 출력측 평활 캐패시터;를 더 포함하는 것을 특징으로 한다.The power converter includes: an input side smoothing capacitor for removing a pulsation component of an input voltage applied from a battery; And an output-side smoothing capacitor which removes the pulsating component of the output voltage of the inductor and applies it to the light source unit.

상기 광원부는 650 칸델라의 광도를 발하도록 다수의 발광다이오드를 직병렬 접속하여 구성한 것을 특징으로 한다.The light source unit may be configured by connecting a plurality of light emitting diodes in parallel and in parallel so as to emit 650 candelas.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 차량용 미등 장치를 나타낸 회로도로, 도면에 도시된 것처럼 내구성이 우수한 다수의 발광다이오드(LED)를 직병렬 접속하여 미등의 광원부(200)를 형성하고 있다. FIG. 1 is a circuit diagram illustrating a taillight device for a vehicle according to the present invention. As shown in the drawing, a plurality of light emitting diodes (LEDs) having excellent durability are connected in parallel to form a light source unit 200 of a taillight.

본 실시예에서는 가로 22개, 세로 12개의 총 264개의 백색 발광다이오드를 200mm간격으로 직병렬 접속하여 미등의 광원부(200)를 형성하고 있는데, 각 발광다이오드(LED)가 250mcd의 광도를 발함에 따라 광원부(200)는 총 660 칸델라의 광도를 발하게 된다. In the present embodiment, a total of 264 white light emitting diodes of 22 horizontally and 12 vertically are connected in parallel to each other at 200 mm intervals to form a light source unit 200 of taillights. As each LED emits 250 mcd of light The light source unit 200 emits a total of 660 candelas.

상기 광원부(200)의 구성은 본 발명을 설명하기 위해 예시한 것으로, 본 발 명은 이에 한정되는 것은 아니다.The configuration of the light source unit 200 is illustrated to explain the present invention, but the present invention is not limited thereto.

한편, 상기 광원부(200)와 미도시된 배터리의 사이에는 배터리로부터 인가되는 전압을 소정 크기의 전압으로 변환하여 상기 광원부(200)로 공급하는 파워 컨버터(100)가 구비된다.On the other hand, between the light source unit 200 and the battery not shown is provided a power converter 100 to convert the voltage applied from the battery to a voltage of a predetermined size to supply to the light source unit 200.

상기 파워 컨버터(100)는 퓨즈(F1)와 다이오드(D1~D2)를 통해 배터리로부터 인가되는 입력 전압에 포함된 맥동 성분을 제거하는 입력측 평활 캐패시터(C1)와, 상기 평활 캐패시터(C1)의 출력 전압을 소정 크기의 전압으로 변환하는 스위칭 레귤레이터(U1)와, 상기 레귤레이터(U1)의 출력 전압을 스위칭 온 타임 동안 축적하고, 스위칭 오프 타임 동안 상기 광원부(200)로 인가하는 인덕터(L1)와, 상기 인덕터(L1)의 출력 전압에 포함된 맥동 성분을 제거하는 출력측 평활 캐패시터(C3)와, 상기 레귤레이터(U1)의 이득 조정용 귀환 저항(R1,R2), 및 스위칭 오프 타임 동안 상기 레귤레이터(U1)의 출력단을 접지시키는 쇼트키 다이오드(D3)로 구성되어 있다.The power converter 100 includes an input side smoothing capacitor C1 for removing pulsation components included in an input voltage applied from a battery through a fuse F1 and diodes D1 to D2, and an output of the smoothing capacitor C1. A switching regulator U1 for converting the voltage into a voltage having a predetermined magnitude, an inductor L1 accumulating the output voltage of the regulator U1 during the switching on time, and applying the switching voltage to the light source unit 200 during the switching off time; An output-side smoothing capacitor C3 for removing the pulsating component included in the output voltage of the inductor L1, a gain adjusting feedback resistors R1 and R2 of the regulator U1, and the regulator U1 during a switching off time. Schottky diode (D3) to ground the output terminal of the.

도면중 미설명된 도면부호 C2는 스위칭 저항을 최소화시키는 부스트 캐패시터를, J1, J2는 각각 커넥터를 나타낸 것이다.In the drawings, reference numeral C2, which is not described, denotes a boost capacitor that minimizes switching resistance, and J1 and J2 denote connectors.

다음에는 상기와 같이 구성된 본 발명에 따른 차량용 미등 장치의 동작 방법을 상세히 설명한다.Next, the operation method of the taillight device for a vehicle according to the present invention configured as described above will be described in detail.

야간이나 차량이 터널 또는 지하 주차장내를 주행하는 경우, 운전자가 미등 스위치를 조작하면 배터리의 전원이 퓨즈(F1)와 다이오드(D1~D2)를 통해 파워 컨버터(100)의 입력측 평활 캐패시터(C1)로 인가된다. At night or when the vehicle is traveling in a tunnel or underground parking lot, when the driver operates the tail light switch, the battery power is supplied to the input side smoothing capacitor C1 of the power converter 100 through the fuses F1 and diodes D1 to D2. Is applied.

이에 따라, 입력측 평활 캐패시터(C1)는 배터리로부터 인가되는 입력 전압에 포함된 맥동 성분을 제거하고, 스위칭 레귤레이터(U1)는 상기 평활 캐패시터(C1)의 출력 전압을 소정 크기의 전압으로 변환한다.Accordingly, the input side smoothing capacitor C1 removes the pulsation component included in the input voltage applied from the battery, and the switching regulator U1 converts the output voltage of the smoothing capacitor C1 into a voltage having a predetermined magnitude.

한편, 스위칭 레귤레이터(U1)의 출력단에 접속된 인덕터(L1)는 상기 레귤레이터(U1)의 출력 전압을 스위칭 온 타임 동안 축적하고, 출력 전압의 맥동 성분을 제거하는 출력측 평활 캐패시터(C3)를 통해 스위칭 오프 타임 동안 상기 광원부(200)로 인가한다.Meanwhile, the inductor L1 connected to the output terminal of the switching regulator U1 switches through the output side smoothing capacitor C3 which accumulates the output voltage of the regulator U1 during the switching on time and removes the pulsation component of the output voltage. It is applied to the light source unit 200 during the off time.

따라서, 광원부(100)의 발광다이오드(LED)가 전압의 인가에 따라 점등되어 차량의 존재를 후속 차량에게 알려주게 된다.Therefore, the light emitting diode LED of the light source unit 100 is turned on according to the application of the voltage to inform the subsequent vehicle of the existence of the vehicle.

이때, PWM(pulse-width-modulation) 제어되는 스위칭 레귤레이터(U1)의 출력 전압(Vout)은 이득 조정용 귀환 저항(R1,R2)의 저항치와 이들 저항을 통해 귀환되는 피드백 전압(VFB)의 크기에 따라 다음의 [수학식1]과 같이 설정된다.At this time, the output voltage (V out ) of the pulse-width-modulation (PWM) controlled switching regulator U1 is the resistance value of the feedback resistors R1 and R2 for gain adjustment and the feedback voltage V FB fed back through these resistors. According to the size, it is set as [Equation 1] below.

Figure 112005018908948-pat00001
Figure 112005018908948-pat00001

또한, 스위칭 오프 타임 동안에는 상기 레귤레이터(U1)의 출력 전압이 인덕터(L1)로 인가되지 못하도록 상기 레귤레이터(U1)의 출력단은 쇼트키 다이오드(D3)를 통해 접지되게 된다.In addition, the output terminal of the regulator U1 is grounded through the Schottky diode D3 so that the output voltage of the regulator U1 is not applied to the inductor L1 during the switching off time.

상기와 같이 본 발명은 차량의 미등을 다수의 발광다이오드로 구성함에 따라 고광도를 발휘할 수 있으며, 또한 내구성이 우수하여 미등의 사용 수명을 연장할 수 있다는 효과가 있다.As described above, according to the present invention, the tail light of the vehicle is composed of a plurality of light emitting diodes, so that high brightness can be exhibited and the durability of the tail light can be extended, thereby extending the service life of the tail light.

Claims (4)

차량용 미등장치에 있어서,In the vehicle taillight device, 직병렬로 접속된 다수의 발광다이오드(LED)로 이루어진 광원부(200)와;A light source unit 200 including a plurality of light emitting diodes (LEDs) connected in parallel and in parallel; 차량용 배터리로부터 인가되는 전압을 소정 크기의 전압으로 변환하여 상기 광원부(200)로 공급하는 파워 컨버터(100);를 구비하는 것을 특징으로 하는 차량용 고광도 미등장치.And a power converter (100) for converting the voltage applied from the vehicle battery into a voltage having a predetermined magnitude and supplying the voltage to the light source unit (200). 제 1 항에 있어서, 상기 파워 컨버터(100)는, The method of claim 1, wherein the power converter 100, 배터리로부터 인가되는 입력 전압을 소정 크기의 전압으로 변환하는 스위칭 레귤레이터(U1)와; A switching regulator U1 for converting an input voltage applied from the battery into a voltage having a predetermined magnitude; 상기 레귤레이터(U1)의 출력 전압을 스위칭 온 타임 동안 축적하고, 스위칭 오프 타임 동안 상기 광원부(200)로 인가하는 인덕터(L1)와; An inductor (L1) for accumulating the output voltage of the regulator (U1) during the switching on time and applying it to the light source unit (200) during the switching off time; 상기 레귤레이터(U1)의 이득 조정용 귀환 저항(R1,R2); 및 스위칭 오프 타임 동안 상기 레귤레이터(U1)의 출력단을 접지시키는 쇼트키 다이오드(D3);를 포함하는 것을 특징으로 하는 차량용 고광도 미등장치.Gain regulating feedback resistors R1 and R2 of the regulator U1; And a Schottky diode (D3) for grounding the output terminal of the regulator (U1) during a switching off time. 제 2 항에 있어서, 상기 파워 컨버터(100)는, The method of claim 2, wherein the power converter 100, 배터리로부터 인가되는 입력 전압의 맥동 성분을 제거하는 입력측 평활 캐패시터(C1)와; An input side smoothing capacitor C1 for removing the pulsating component of the input voltage applied from the battery; 상기 인덕터(L1)의 출력 전압의 맥동 성분을 제거하여 상기 광원부(200)로 인가하는 출력측 평활 캐패시터(C3);를 더 포함하는 것을 특징으로 하는 차량용 고광도 미등장치. And an output-side smoothing capacitor (C3) for removing the pulsating component of the output voltage of the inductor (L1) and applying it to the light source unit (200). 제 1 항에 있어서, The method of claim 1, 상기 광원부(200)는 650 칸델라 정도의 광도를 발하도록 다수의 발광다이오드(LED)를 직병렬 접속하여 구성한 것을 특징으로 하는 차량용 고광도 미등장치. The light source unit 200 is a high-intensity taillight device for a vehicle, characterized in that configured to be connected in parallel to a plurality of light emitting diodes (LED) to emit a light intensity of about 650 candela.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101132715B1 (en) 2011-09-16 2012-04-06 장동철 Led fountain having stable jet and power saving features

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KR20000005129U (en) * 1998-08-22 2000-03-15 윤종용 Charging Voltage Supply
KR20000020856A (en) * 1998-09-24 2000-04-15 윤종용 Thin film transistor liquid crystal display having circuit for stabilizing driving power source
KR20030000881A (en) * 2001-06-27 2003-01-06 주식회사 포스코 A Method for Removing Reclained lump steel on the Converter Throat Using Nitrogen Blowing
JP2004136719A (en) * 2002-10-15 2004-05-13 Koito Mfg Co Ltd Lighting circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000005129U (en) * 1998-08-22 2000-03-15 윤종용 Charging Voltage Supply
KR20000020856A (en) * 1998-09-24 2000-04-15 윤종용 Thin film transistor liquid crystal display having circuit for stabilizing driving power source
KR20030000881A (en) * 2001-06-27 2003-01-06 주식회사 포스코 A Method for Removing Reclained lump steel on the Converter Throat Using Nitrogen Blowing
JP2004136719A (en) * 2002-10-15 2004-05-13 Koito Mfg Co Ltd Lighting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101132715B1 (en) 2011-09-16 2012-04-06 장동철 Led fountain having stable jet and power saving features

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