KR200355683Y1 - a controller for traffic signal light type of LED lamp - Google Patents

Abstract

The present invention relates to the illumination control of a traffic light, the purpose of which is to improve the lighting brightness control device in the traffic light of the energy-saving LED adoption method.

In order to achieve the above object, a DC power generator means for converting the AC voltage output from the load switching unit (LSU) of the traffic signal controller into a direct current, the LED driving current; Circuit means for detecting phase control data of a voltage output in accordance with a command of a central control center or an order of a program mounted on a traffic controller; A main processing unit (MPU) unit for controlling the illumination control output signal according to the operation of the detection data and the operation result; The invention relates to a drive device for an LED traffic light, characterized in that it is composed of an output drive circuit means for driving an LED lamp.

According to the present invention, since the brightness (illuminance, 光度) is controlled in accordance with the control output of the traffic signal controller in the traffic signal lamp using the LED lamp, it is expected to reduce the loss of installation and maintenance due to the sensor attached and energy saving effect You can do it.

Description

Driving device for LED traffic light {a controller for traffic signal light type of LED lamp}

The present invention is to be installed on one side of an existing traffic signal controller (human road where flashing road traffic lights are installed) and refers to an existing traffic signal controller provided by a gray steel box under a yellow roof. LED signal driven by receiving AC voltage outputted from LSU (load switching unit, load interruption control means), and the following description will be omitted. The present invention relates to a driving device for a traffic light, and, in summary, relates to a light signal control of a traffic signal that receives an output of a traffic signal controller installed on a road and performs a point and light out operation.

Conventionally, an AC power source (commonly referred to as "AC") is output through "LSU" based on the operation sequence of a general traffic signal controller. The signal lamp receiving the electric signal is connected to the signal by using an incandescent lamp or "LED" (abbreviation for light emitting diode, commonly referred to as a light emitting diode) in which rectifying means is installed. Corresponding green or yellow or red lights are illuminated.

Such a conventional configuration method is output from the central control unit of the traffic signal controller or remote control from the traffic signal central control center in order to adjust the illumination corresponding to the brightness of the day and night in the traffic signal lamp mainly installed in the adoption of incandescent bulbs In accordance with the signal of the illumination control amount (hereinafter referred to as a traffic signal controller), the AC power is phase-controlled and output from the "LSU" circuit block according to the signal of the illuminance adjustment amount, thereby reducing power energy by adjusting brightness more than necessary at night. Effect was provided.

However, according to the trend of semiconductor industry technology and market changes, various traffic lights using LEDs have been developed and installed due to the semi-permanent lifespan and the production and diffusion of LEDs, which are environmentally friendly lighting means. However, there are the following problems.

The AC power output from the traffic signal controller is applied to the LED through the rectifying step, the smoothing step, and the constant voltage adjusting step, and is driven regardless of the action of adjusting the illuminance to the phase-controlled output according to the amount of external light. There is a disadvantage that the energy saving or illumination control effect is not provided.

Subsequently, a conventional embodiment of the circuit configuration of the control section in the traffic signal controller provided with the above-described illuminance adjustment, that is, the illumination brightness adjustment function will be described with reference to FIGS. 3 and 4 as follows.

3 is a block diagram of an exemplary embodiment of a circuit configuration of an "LSU" unit of a conventional traffic signal control apparatus.

According to the operation order of the normal traffic signal controller provided on the road where the traffic light is installed, the AC power of the AC ON or OFF signal is output through the LSU, and the traffic light blinks upon receiving the AC power.

In the traffic signal controller, a schematic circuit configuration of the "LSU" unit includes a circuit block cb10 of a power input unit for supplying electrical energy, and a central control device of the traffic signal controller in which a program of phase control according to light quantity is stored. The photo triac is turned on and off in response to the input of the phase control signal output from the circuit, and a circuit block cb20 of means for performing phase control for illuminance adjustment is provided, and the photo triac is turned on and off. By controlling the gate trigger signal of the triac, the AC power that has passed through the triac is provided with a circuit block cb30 of an action means for outputting a phase controlled AC power, and monitoring the phase controlled output AC power. The circuit block cb40 of the acting means to be provided is comprised.

The output of the phase-controlled AC power in the "LSU" circuit block is to be input to the traffic signal 100, such as a crosswalk light, road traffic light, yellow flashing light, crossing signal remaining amount indicator.

4 illustrates a waveform of a lighting signal of a traffic light output from the above-described "LSU", that is, a phase controlled AC power source, as follows.

The waveforms of the phase-controlled AC power supply are shown in five exemplary embodiments, and the waveform of “Full P” is an example of a waveform in which the AC power is applied to the maximum and the signal lamp is at maximum brightness. % P "is a half cycle control waveform," b% P "is a full cycle control waveform, and" c% P "is an example of a waveform that cuts off and supplies current at a predetermined phase angle among all cycles. The phase control method is selected according to the manufacturer or operation type of the traffic signal controller, and the purpose of the phase control is an example of a power waveform in which the power supply is phase controlled so that the traffic light is dimmed from the maximum brightness. In the drawing, "Zero P" shows an unlit state in which power supply is cut off.

As described above, in the case of using the incandescent lamp, the phase control of the traffic light supply AC power supply in the traffic signal controller is provided to control the brightness of the light.However, in the case of the traffic light employing the LED, the DC power supply is controlled by the constant voltage. As it is supplied, the brightness becomes constant.

More specifically, the phase control has been steadily used in traffic signal control technology since the introduction of the national policy of energy saving, and has been applied to signal lamps employing incandescent lamps, but converts existing AC power into DC power. The LED signal, the pedestrian crossing remaining time display device, or the LED signal light driven by receiving the signal of external light amount are the constant current or constant voltage driving method regardless of the phase control of the AC power output from the "LSU". The action was not easy.

In other words, incandescent lamps have a high power consumption and have a relatively short lifespan, and thus, are gradually being installed as LED lamps. However, LED lamps require a light quantity sensor for each signal lamp and existing ones. It does not use the phase control function installed in the traffic signal controller in the operation function is a disadvantage that is lost.

Therefore, an object of the present invention is to provide a driving device of an LED traffic signal lamp to exhibit both the advantages of the conventional incandescent lamp employing method and the advantages of the LED employing method.

The present invention is to provide a technology of the invention further improved and advanced in view of the above problems and situations,

The present invention is a LED traffic light driving device that can adjust the illumination of the traffic light employing the LED, without modifying the existing traffic signal controller control device, repair or additional light quantity controller for each additional traffic lights The purpose is to provide a technical problem and object of the present invention.

1 is a circuit configuration block diagram of the driving device of the LED traffic light according to the present invention

Figure 2 is an example of the operation sequence of the driving device of the LED traffic light according to the present invention

3 is a block diagram of an exemplary circuit configuration of an "LSU" unit of a conventional traffic signal control apparatus;

4 is an AC power supply waveform diagram of an exemplary embodiment in which phase control is performed from a conventional "LSU";

<Description of Major Symbols in Drawing>

cb1. Block of power input means, cb2. Circuit block of central control means,

cb3. Circuit block of dc power generating means,

cb4. Circuit block of the power supply state detecting means,

cb5. Circuit block of drive means of traffic light LED module,

cb100. LED module for traffic light

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the traffic light employing LED, the driving device of the LED adoptive traffic light which can adjust the illuminance without modifying or repairing the control device of the existing traffic signal controller or adding a separate light quantity controller with reference to the accompanying drawings. The technical configuration and operation of the present invention will be described.

1 is a block diagram of an exemplary embodiment of a circuit configuration of a driving device of an LED signal lamp according to the present invention.

The circuit configuration of the driving device of the LED traffic light according to the present invention is provided with a block cb1 of means for receiving AC power phase-controlled according to the amount of ambient light from " LSU " of the traffic signal controller; A block cb3 of a direct current power generating means for receiving the power and outputting a constant voltage within a direct current 50 volts including rectification and smoothing means to supply direct current power to all circuit portions of the drive device; The circuit block cb4 of the power supply state detection means of the means for detecting together the state of the phase control of the AC power supplied from the "LSU" and the communication signal of turning off or turning off the signal light of the color or the second signal light is provided. Output data; Taking out the detected output data from a central processing unit (MPU) block cb2 in which a predetermined program is embedded, and outputting a turning off and illuminance control signal after computational processing such as calculation and comparison; An LED drive circuit block cb5 is provided to take electrical signals from the central processing unit and to turn off and turn on the LED module cb100 as a signal lamp, and to operate the LED module in a state of driving current or voltage. The circuit block cb6 of the means for detecting the error state of the traffic light indication by detecting the provided is provided.

To summarize the relationship in which the blocks operate in conjunction,

Receives the AC power output from the traffic signal controller "LSU", detects the phase, converts the data to "DLL" (digital logic level), receives the signal from the central processing unit, and computes the result. It transmits the signal "DLL", which is the output level of the central processing unit, to the operation level of the LED module in the LED drive unit, and the signal lamp is turned on according to the illuminance corresponding to the converted output. As a more simple explanation, the phase of the AC power output from the "LSU" of the traffic signal controller is detected and computed, and the signal lamp provided with the LED module is turned on so as to match the computed illuminance adjustment level.

In the circuit configuration of the driving device of the LED signal lamp described above, a preferred embodiment in the circuit configuration of the block cb3 of the DC power generating means for outputting a constant voltage within 50 volts of DC voltage including rectification and smoothing means is shown in FIG. Since the input power is phase-controlled and input as shown in FIG. 2, a circuit configuration of a switching power method is preferable to a circuit configuration using a conventional inductive transformer, and the switching power is generally known as "SMPS". Detailed description thereof will be omitted.

The dimming control level is divided by the amount of power supply per phase-controlled unit of input power from 0 to 100% to perform computational processing such as calculation, and time-division per hour to turn on the LED by% (percent) corresponding to the computerized data. It refers to the level that controls brightness by operating from 0 to 100% with power.

In addition, the circuit structure of an LED drive is comprised by switching elements, such as a transistor TR, a field effect transistor, and an SCR.

FIG. 2 is a flowchart illustrating an example of a circuit operation procedure of the driving device of the LED signal lamp according to the present invention as described above.

First of all, the driving is started by receiving the phase controlled electric signal from the "LSU" of the traffic signal controller, that is, AC power, and receiving the control communication signals such as phase control data and traffic signal classification of the input AC power. After performing the computational processing for comparison, a controlled DC power supply for driving the LEDs is output at a corresponding level of illuminance (time-divided DC power output) so that the traffic light is turned on and the current or voltage of the controlled DC output power supply is turned on. It is to output the reset signal to turn off the traffic lights when the phase-controlled electrical signal, that is, the AC power becomes zero, is fed back. .

The operation and configuration of the present invention have been described above, and the contents of the present invention described above will be summarized.

The present invention relates to illuminance control of a traffic light, and more particularly, in a traffic light employing LEDs, the illumination control of the existing traffic signal controller can be performed without modifying, repairing, or additionally installing a separate light quantity controller. It is an object of the present invention to provide a driving device for an LED traffic light.

In order to achieve the above object, a DC power generator means for converting an AC voltage output from the "LSU" (load switching unit) of the traffic signal controller into a direct current, the LED driving current; Circuit means for detecting phase control data of a voltage output in accordance with a command of a central control center or an order of a program mounted on a traffic controller; An MPU (main control unit) unit for controlling the illumination control output signal according to the operation of the detection data and the operation result; The invention relates to a drive device for an LED traffic light, characterized in that it is composed of an output drive circuit means for driving an LED lamp.

The driving device of the traffic signal lamp employing the LED according to the present invention is to leave the traffic signal controller using the incandescent lamp as it is, and detect the phase of the AC power output from the "LSU" and time-division by the corresponding illuminance level. It is composed of driving a LED-type traffic signal that outputs a DC power supply (a ratio of the time when a rated DC power is applied per unit time) to the illumination control, and such circuit configuration can be modified by any person skilled in the art. It should be protected if its implementation is within the scope of the technical configuration and idea for the purpose of the present invention.

According to the present invention, since the brightness is automatically controlled according to the control output form of the traffic signal controller in the traffic light using the LED lamp, the effect of reducing the loss of installation and maintenance due to the attachment of the sensor and the energy saving effect can be expected. In addition, it can be installed without modification of the existing traffic signal controller, it is possible to obtain the effect of saving energy by phase control as in the case of using an incandescent light bulb, the cost of the illumination control effect or action is provided, namely The advantage is the low cost of the facility.

Claims (3)

The present invention relates to a driving device of the LED light traffic lights that can adjust the illumination, A circuit of rectifying means for inputting a phase controlled AC power source suitable for illuminance from a load switching unit (LSU) of the traffic signal controller, and converting the AC power source to DC; A circuit of means for detecting a phase control state of the AC power supply; A central control unit for calculating phase detection data and outputting a time division energization control signal corresponding to illuminance; A drive device for an LED traffic light, characterized by comprising a circuit of drive means for receiving the time-division signal and driving the LED. 2. A drive device for an LED traffic signal light according to claim 1, wherein the rectifying means for converting to direct current is constituted by a switching power circuit. 2. The driving device of an LED traffic signal light according to claim 1, wherein a circuit portion for detecting a malfunction of a traffic light is provided by comparing the time division energization control signal corresponding to the illuminance with the LED drive signal.