WO2001046931A1 - Led traffic signal lamp - Google Patents

Led traffic signal lamp Download PDF

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Publication number
WO2001046931A1
WO2001046931A1 PCT/KR2000/001500 KR0001500W WO0146931A1 WO 2001046931 A1 WO2001046931 A1 WO 2001046931A1 KR 0001500 W KR0001500 W KR 0001500W WO 0146931 A1 WO0146931 A1 WO 0146931A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
traffic signal
led
detecting
lamp
Prior art date
Application number
PCT/KR2000/001500
Other languages
French (fr)
Other versions
WO2001046931A9 (en
Inventor
Jun-Ho Jang
Original Assignee
Jang Jun Ho
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jang Jun Ho filed Critical Jang Jun Ho
Publication of WO2001046931A1 publication Critical patent/WO2001046931A1/en
Publication of WO2001046931A9 publication Critical patent/WO2001046931A9/en

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights

Definitions

  • the present invention relates to a traffic signal lamp, and m particular to an LED traffic signal lamp having a device for detecting an error and a device for operating an emergency amp.
  • Figure 1 is a circuit diagram illustrating a detecting unit of a conventional traffic signal control unit
  • Figure 2 is a flowchart showing an operation of the conventional LED traffic signal lamp.
  • a signal lamp 240 when operated by an AC control unit 200, current and voltage are induced through a trans unit 210 according to the operation of an AC bulb.
  • a detecting unit 220 detects the induced current and voltage, and transmits a signal to a central processing unit 230.
  • a yellow lamp is flickered m the wnole traffic signal lamps to warn drivers.
  • an AC power is transmitted to an LED bloc ⁇ unit 330 through a DC power unit 310 and a control unit 320 by an AC power unit 300 for inputting the AC power to the traffic signal lamp 240.
  • the LED block un t 330 may use the LED instead of the incandescent lamp.
  • 200 to 300 LEDs are connected m series or parallel m the LED block unit 330. Accordingly, when the LEDs are connected m series, if any of them has a defect, the whole LEDs are not operated.
  • the LED traffic signal lamo consumes small power, namely about 10W m using about 300 LEDs.
  • the detecting unit of the conventional traffic signal control unit cannot recognize such small power consumption.
  • the trans unit is designed suitable for current and voltage flowing through lOO bulb. Therefore, wher 10W of the LED traffic signal lamp is installed, the trans unit is reduced to 1/10 induced current and voltage, thus transmitting a non-operation state to the detecting unit.
  • a new design method is required to detect flow of a small current by using the conventional detectin ⁇ device.
  • to replace the traffic signal lamp may cause many problems .
  • an object of the present invention is to provide an LEE traffic signal lamp which can detect an error of an LED when the LEDs of a serial LED block are not turned on due to the error, transmit the detected error to another device to handle the error, operate an emergency ramp, and utilize a detecting unit of a general traffic signal control unit accordin ⁇ to the operation of the emergency lamp.
  • an LED traffic signal lamp including: a detectingunit for detecting an error detection signal by detecting an operation of an LED block unit; a drive terminal driven according to the detection signal detected by the detecting unit; and an emergency lamp unit driven by the drive terminal.
  • an emergency lamp is automatically operated by error signal detection of the traffic signal lamp itself, thereby preventing a traffic ja from occurring.
  • the traffic am may also be generated by flickering the whole lamps.
  • tne lamps can be individually flickered to induce a slow speed.
  • the device for detecting the error can be externally connected to automaticallymonitor the traff c signal lamp, whichprevents the traffic jam from occurring.
  • Figure 1 is a circuit diagram illustrating a detecting unit of a conventional traffic signal control unit
  • Figure 2 is a flowchart showing an operation of a conventional LED traffic signal lamp
  • Figure 3 is a circuit diagram illustrating a device for detecting an error and a device for operating an emergency lamp m an LED traffic signal lamp in accordance with the present invention
  • Figure 4 is a full-wave rectification waveform diagram of the LED traffic signal lamp in accordance with the present invention
  • Figure 5 is a waveform diagram passing a rectifying unit in the LED traffic signal lamp m accordance with the present invention.
  • Figure 3 is a circuit diagram illustrating the device for detecting the error andthe device for operating the emergency lamp m the LED traffic signal lamp m accordance with the present invention.
  • a DC detecting unit 20 detects rectified power.
  • the stabilized DC power for detection forms a low voltage by a Zener diode ZD1 of a rectifying unit 30, and supplies the voltage to an on/off drive of the emergency lamp.
  • the AC power unit 10 is connected to a bridge diode composing the detecting unit 20.
  • the bridge diode is connected to a resistor R4 which is an emergency control circuit through the rectifying unit 30 consisting of a resistor Rl, a resistor R3 connected to the resistor Rl, an accumulator Cl connected between the resistors Rl, R2, and the Zener diode ZD1.
  • a high voltage is applied to an emergency lamp unit 60 before the resistor Rl of the rectifying unit 30.
  • An LED block unit 40 is driven by connecting the AC power unit 10 to a DC power unit 11m parallel, thereby driving LEDs m a photo LED 43 connected to the resistor R2.
  • a transistor of the photo LED 43 is bypassed through the resistor R3, and a gate terminal consisting of a transistor Ql is not driven.
  • the transistor Ql of a drive terminal 70 connected to the resistor R4 of the drive terminal 70 is connected to the emergency lamp unit 60, and thus the emergency lamp is turned off.
  • the 50 can confirm the operation of the LED block unit 40 by using the transistor according to the state of the LEDs in the photo
  • the transistor of the photo LED 43 When an error occurs, the transistor of the photo LED 43 is not operated. A signal having a reduced voltage through the resistor R3 detects an external output terminal Jl which is an error detection signal through the resistor R4 of the drive terminal 70. Thereafter, the AC emergency lamp unit 60 is operated by driving the gate terminal of the field effect transistor Ql of the drive terminal 70.
  • the AC emergency lamp unit 60 is designed so that five 20W AC bulbs can be driven by 100W, which can be recognized by the detecting unit of the general traffic signal control unit.
  • the general device can be used as it is.
  • the LED traffic signal lamp can minimize traffic jams frequently generated inthe current traffic system, andalsoprevent traffic accidents from occurring due to a traffic signal error.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

The present invention discloses an LED traffic signal lamp. Power supplied from an AC power unit is converted into DC power through a full-wave rectifying unit to drive an LED block unit. The LED traffic signal lamp includes a detecting unit, a drive terminal and an emergency lamp unit. The detecting unit detects an error detection signal by detecting an operation of the LED block unit, a drive terminal is driven according to the detection signal detected by the detecting unit, and an emergency lamp unit is driven by the drive terminal.

Description

LED TRAFFIC SIGNAL LAMP
TECHNICAL FIELD
The present invention relates to a traffic signal lamp, and m particular to an LED traffic signal lamp having a device for detecting an error and a device for operating an emergency amp.
BACKGROUND ART A conventional traffic signal lamp will now be described with reference to Figures 1 and 2.
Figure 1 is a circuit diagram illustrating a detecting unit of a conventional traffic signal control unit, and Figure 2 is a flowchart showing an operation of the conventional LED traffic signal lamp.
Referring to Figure 1, when a signal lamp 240 is operated by an AC control unit 200, current and voltage are induced through a trans unit 210 according to the operation of an AC bulb. A detecting unit 220 detects the induced current and voltage, and transmits a signal to a central processing unit 230. In the case of an error state, a yellow lamp is flickered m the wnole traffic signal lamps to warn drivers.
On the other hand, the operation of the traffic signal lamp using the LED instead of an incandescent lamp will now be described with reference to Figure 2.
As illustrated m Figure 2, an AC power is transmitted to an LED blocκ unit 330 through a DC power unit 310 and a control unit 320 by an AC power unit 300 for inputting the AC power to the traffic signal lamp 240. The LED block un t 330 may use the LED instead of the incandescent lamp.
Here, 200 to 300 LEDs are connected m series or parallel m the LED block unit 330. Accordingly, when the LEDs are connected m series, if any of them has a defect, the whole LEDs are not operated.
Advantageously, the LED traffic signal lamo consumes small power, namely about 10W m using about 300 LEDs. However, the detecting unit of the conventional traffic signal control unit cannot recognize such small power consumption. In addition, the trans unit is designed suitable for current and voltage flowing through lOO bulb. Therefore, wher 10W of the LED traffic signal lamp is installed, the trans unit is reduced to 1/10 induced current and voltage, thus transmitting a non-operation state to the detecting unit. As a result, a new design method is required to detect flow of a small current by using the conventional detectinσ device. Here, to replace the traffic signal lamp may cause many problems . DISCLOSURE OF THE INVENTION
Accordingly, an object of the present invention is to provide an LEE traffic signal lamp which can detect an error of an LED when the LEDs of a serial LED block are not turned on due to the error, transmit the detected error to another device to handle the error, operate an emergency ramp, and utilize a detecting unit of a general traffic signal control unit accordinα to the operation of the emergency lamp.
In order to achieve the above-described object of the present invention, there is provided an LED traffic signal lamp including: a detectingunit for detecting an error detection signal by detecting an operation of an LED block unit; a drive terminal driven according to the detection signal detected by the detecting unit; and an emergency lamp unit driven by the drive terminal.
According to the present invention, an emergency lamp is automatically operated by error signal detection of the traffic signal lamp itself, thereby preventing a traffic ja from occurring. The traffic am may also be generated by flickering the whole lamps. According to the present invention, tne lamps can be individually flickered to induce a slow speed. Moreover, the device for detecting the error can be externally connected to automaticallymonitor the traff c signal lamp, whichprevents the traffic jam from occurring.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a circuit diagram illustrating a detecting unit of a conventional traffic signal control unit;
Figure 2 is a flowchart showing an operation of a conventional LED traffic signal lamp;
Figure 3 is a circuit diagram illustrating a device for detecting an error and a device for operating an emergency lamp m an LED traffic signal lamp in accordance with the present invention;
Figure 4 is a full-wave rectification waveform diagram of the LED traffic signal lamp in accordance with the present invention; and Figure 5 is a waveform diagram passing a rectifying unit in the LED traffic signal lamp m accordance with the present invention.
MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS An LED traffic signal lamp having a device for detecting an error and a αevice for operating an emergency lamp in accordance with the present invention will now be described m detail with reference to the accompanying drawings.
Figure 3 is a circuit diagram illustrating the device for detecting the error andthe device for operating the emergency lamp m the LED traffic signal lamp m accordance with the present invention.
Referring to Figure 3, in order to drive an LED bulb, power is supplied from an AC power unit 10 for supplying power to an AC bulb for a traffic signal lamp 140 to a DC detecting unit 20. As shown in Figure 4, the DC detecting unit 20 detects rectified power. The stabilized DC power for detection forms a low voltage by a Zener diode ZD1 of a rectifying unit 30, and supplies the voltage to an on/off drive of the emergency lamp.
In addition, as illustrated m Figure 3, the AC power unit 10 is connected to a bridge diode composing the detecting unit 20. The bridge diode is connected to a resistor R4 which is an emergency control circuit through the rectifying unit 30 consisting of a resistor Rl, a resistor R3 connected to the resistor Rl, an accumulator Cl connected between the resistors Rl, R2, and the Zener diode ZD1. A high voltage is applied to an emergency lamp unit 60 before the resistor Rl of the rectifying unit 30. An LED block unit 40 is driven by connecting the AC power unit 10 to a DC power unit 11m parallel, thereby driving LEDs m a photo LED 43 connected to the resistor R2.
At this time, a transistor of the photo LED 43 is bypassed through the resistor R3, and a gate terminal consisting of a transistor Ql is not driven.
As a result, the transistor Ql of a drive terminal 70 connected to the resistor R4 of the drive terminal 70 is connected to the emergency lamp unit 60, and thus the emergency lamp is turned off.
In addition, when the LED block unit 40 is connected to the transistor output of the photo LED 43, a detecting unit
50 can confirm the operation of the LED block unit 40 by using the transistor according to the state of the LEDs in the photo
LED 43.
When an error occurs, the transistor of the photo LED 43 is not operated. A signal having a reduced voltage through the resistor R3 detects an external output terminal Jl which is an error detection signal through the resistor R4 of the drive terminal 70. Thereafter, the AC emergency lamp unit 60 is operated by driving the gate terminal of the field effect transistor Ql of the drive terminal 70.
Here, the AC emergency lamp unit 60 is designed so that five 20W AC bulbs can be driven by 100W, which can be recognized by the detecting unit of the general traffic signal control unit. When a detecting code is inversely executed m a program of the control unit, the general device can be used as it is.
In accordance with the present invention, the LED traffic signal lamp can minimize traffic jams frequently generated inthe current traffic system, andalsoprevent traffic accidents from occurring due to a traffic signal error.

Claims

1. An LED traffic signal lamp driving a LED block unit by power supplied from an AC power unit being converteα into DC power through a full-wave rectifying unit, comprising: a detecting unit for detecting an error detection signal by detecting an operation of an LED block unit; a drive terminal driven according to the detection signal detected by the detecting unit; and an emergency lamp unit driven by the drive terminal.
2. The LED traffic signal lamp according to claim 1, wherein the detecting unit comprises a resistor and a transistor connected to the rectifying unit, the drive terminal comprises a resistor and a transistor connected to the resistor ana transistor of the detecting unit, and the emergency lamp unit comprises a plurality of lamps connected to the transistor of the drive terminal and the rectifying unit.
PCT/KR2000/001500 1999-12-21 2000-12-21 Led traffic signal lamp WO2001046931A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR19990029085U KR200191371Y1 (en) 1999-12-21 1999-12-21 Led sign detector & emergency lamp
KR1999/29085U 1999-12-21

Publications (2)

Publication Number Publication Date
WO2001046931A1 true WO2001046931A1 (en) 2001-06-28
WO2001046931A9 WO2001046931A9 (en) 2004-11-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/001500 WO2001046931A1 (en) 1999-12-21 2000-12-21 Led traffic signal lamp

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KR (1) KR200191371Y1 (en)
WO (1) WO2001046931A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140331A1 (en) * 2001-08-16 2003-04-03 Siemens Ag Traffic control light signals and method for monitoring the function of such a sign
WO2003091965A1 (en) * 2002-04-15 2003-11-06 Gatsometer B.V. Method and device for controlling a red light camera

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321599A (en) * 1976-08-12 1978-02-28 Fujitsu Ltd Lamp disconnection detecting circuit
US4733335A (en) * 1984-12-28 1988-03-22 Koito Manufacturing Co., Ltd. Vehicular lamp
JPH07287043A (en) * 1994-04-18 1995-10-31 Sankosha:Kk Disconnection detector of signal lamp using light emitting diode
JPH0986274A (en) * 1995-09-20 1997-03-31 Harness Sogo Gijutsu Kenkyusho:Kk Light trouble backup device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321599A (en) * 1976-08-12 1978-02-28 Fujitsu Ltd Lamp disconnection detecting circuit
US4733335A (en) * 1984-12-28 1988-03-22 Koito Manufacturing Co., Ltd. Vehicular lamp
JPH07287043A (en) * 1994-04-18 1995-10-31 Sankosha:Kk Disconnection detector of signal lamp using light emitting diode
JPH0986274A (en) * 1995-09-20 1997-03-31 Harness Sogo Gijutsu Kenkyusho:Kk Light trouble backup device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10140331A1 (en) * 2001-08-16 2003-04-03 Siemens Ag Traffic control light signals and method for monitoring the function of such a sign
DE10140331C2 (en) * 2001-08-16 2003-11-06 Siemens Ag Traffic control light signals and method for monitoring the function of such a sign
US7129856B2 (en) 2001-08-16 2006-10-31 Siemens Aktiengesellschaft Illuminated sign for traffic control and method for functional monitoring of such a sign
WO2003091965A1 (en) * 2002-04-15 2003-11-06 Gatsometer B.V. Method and device for controlling a red light camera

Also Published As

Publication number Publication date
KR200191371Y1 (en) 2000-08-16
WO2001046931A9 (en) 2004-11-18

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