KR20030005143A - traffic signal - Google Patents

traffic signal Download PDF

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Publication number
KR20030005143A
KR20030005143A KR1020010039922A KR20010039922A KR20030005143A KR 20030005143 A KR20030005143 A KR 20030005143A KR 1020010039922 A KR1020010039922 A KR 1020010039922A KR 20010039922 A KR20010039922 A KR 20010039922A KR 20030005143 A KR20030005143 A KR 20030005143A
Authority
KR
South Korea
Prior art keywords
light
light emitting
traffic
signal
emitting diode
Prior art date
Application number
KR1020010039922A
Other languages
Korean (ko)
Inventor
김봉진
Original Assignee
나이넥스 주식회사
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 나이넥스 주식회사 filed Critical 나이넥스 주식회사
Priority to KR1020010039922A priority Critical patent/KR20030005143A/en
Publication of KR20030005143A publication Critical patent/KR20030005143A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Led Devices (AREA)
  • Traffic Control Systems (AREA)
  • Control Of El Displays (AREA)

Abstract

PURPOSE: A traffic signal light is provided to reduce the changes of illumination in response to the changes of temperature. CONSTITUTION: A signal light includes a light source for utilizing a light emitting diode as a major display light source, a sensing block for detecting a temperature around the traffic light signal or an internal temperature and an electronic circuit block for increasing or for decreasing the current supplied to the light emitting diode in response to the value of the sensor. In the device, the circuit gradually and continuously changes the current.

Description

교통신호등{traffic signal}Traffic signal

발광다이오드는 주위의 온도에 따라 발광효율이 변하는 특성을 가지고 있다. 일반적으로 온도가 올라감에 따라 다이오드 내부의 발광효율이 감소함에 따라 휘도가 낮아지는 특성이 있다. 따라서 발광다이오드를 주요광원으로 사용하는 교통신호등은 주변 또는 내부의 온도가 변하면 휘도가 따라서 변하는 것을 막을 수 없다.The light emitting diode has a characteristic that the light emitting efficiency changes according to the ambient temperature. In general, the luminance is lowered as the luminous efficiency inside the diode decreases as the temperature increases. Therefore, a traffic light that uses the light emitting diode as a main light source cannot prevent the luminance from changing accordingly when the ambient or internal temperature changes.

하지만, 신호기 내부에 온도를 냉각할 수 있는 냉각기를 부착하는 것은 실용적으로 어려움이 있고, 냉각팬을 달아도 한여름 대낯에는 충분한 냉각효율은 얻기가 어렵다.However, it is practically difficult to attach a cooler capable of cooling the temperature inside the signal, and sufficient cooling efficiency is difficult to obtain in midsummer even when a cooling fan is attached.

따라서 본 발명은 이러한 신호기 내부의 온도에 따른 신호등의 휘도변화 뿐 아니라 시간에 따른 휘도변화를 최소화 하기위한 것으로 신호등 발광부의 휘도를감지하는 센서를 장착하고, 휘도를 감지하여 발광다이오드에 공급되는 전류와 전압을 조절하는 회로를 구비함으로서, 주야간, 계절과 날씨에 따른 신호등의 온도변화와 사용시간에 상관없이 신호등의 밝기를 일정하게 유지한다.Therefore, the present invention is to minimize the change in the brightness of the signal lamp according to the temperature inside the signal, as well as to minimize the change in the brightness over time. By providing a circuit for regulating the voltage, the brightness of the traffic light is kept constant regardless of the temperature change and usage time of the traffic light according to the day and night, season and weather.

도 1 : 본 발명에 의한 계략도1: Schematic diagram according to the present invention

신호기 발광부의 전면이나 측면, 또는 후면에 포토다이오드나 광전소자등 광을 감지할 수 있는 센서를 장착하고, 이들 센서의 값에 따라 전류를 증가 또는 감소 시킬 수 있는 회로를 둔다.Sensors that can sense light, such as photodiodes or photoelectric devices, are mounted on the front, side, or rear of the signal emitter, and a circuit that can increase or decrease the current according to the values of these sensors.

예로 신호등 발광부의 정면 일부분에 포토다이오드를 장착하고, 이 센서의 출력을 일정배수 많큼 증폭한다. 이 증폭된 신호를 발광부에 전압을 공급하는 회로에 역(부)으로 되먹임(feedback)하면, 발광부의 휘도가 감소함에 따라 공급되는 전압이 증가하게 되고, 따라서 공급되는 전류도 증가하고 발광부의 휘도가 증가하게 된다. 발광부의 휘도가 증가하게 되면 공급되는 전압이 감소하고 따라서 휘도가 감소되어 일정한 휘도를 유지할 수 있다.For example, the photodiode is mounted on the front part of the light emitting part of the traffic light, and the output of the sensor is amplified by a certain number of times. When the amplified signal is fed back to the circuit for supplying voltage to the light emitting part, the voltage supplied increases as the brightness of the light emitting part decreases, so that the supplied current also increases and the brightness of the light emitting part increases. Will increase. When the luminance of the light emitting unit is increased, the voltage to be supplied decreases, and thus the luminance is decreased to maintain a constant luminance.

온도변화에 따른 휘도 변화가 감소되었다.Luminance change with temperature change was reduced.

Claims (2)

발광다이오드를 주요 표시 광원으로 사용하는 교통신호등에 있어서, 상기 신호등의 발광부의 휘도를 감지 할 수 있는 광센서를 포함하고, 상기 센서의 값에 따라 발광다이오드에 공급되는 전류를 증가 또는 감소시키는 회로를 포함하는 신호등A traffic light using a light emitting diode as a main display light source, comprising: an optical sensor capable of sensing the brightness of a light emitting portion of the signal light, and a circuit for increasing or decreasing a current supplied to the light emitting diode according to the value of the sensor. Including traffic lights 제 1항에 있어서, 전류를 연속적으로 또는 단계적으로 변화시킬 수 있는 회로를 구비한 신호등2. The traffic light of claim 1 having a circuit capable of varying the current continuously or stepwise.
KR1020010039922A 2001-07-05 2001-07-05 traffic signal KR20030005143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020010039922A KR20030005143A (en) 2001-07-05 2001-07-05 traffic signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020010039922A KR20030005143A (en) 2001-07-05 2001-07-05 traffic signal

Publications (1)

Publication Number Publication Date
KR20030005143A true KR20030005143A (en) 2003-01-17

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ID=27713459

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020010039922A KR20030005143A (en) 2001-07-05 2001-07-05 traffic signal

Country Status (1)

Country Link
KR (1) KR20030005143A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100757177B1 (en) * 2007-01-04 2007-09-07 송영덕 Apparatus for indicating remaining time for traffic signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100757177B1 (en) * 2007-01-04 2007-09-07 송영덕 Apparatus for indicating remaining time for traffic signals

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