CN201310764Y - Improved lamp decoration device for Christmas - Google Patents

Abstract

The utility model discloses a can be for improvement lamp decoration device of usefulness on christmas, include: a display lamp group composed of LEDs, the display lamp group is controlled by an electronic switch, a microcontroller and a switching power supply with overcurrent protection and overpower protection characteristics, the switching power supply is matched with the electronic switch to set and control the lighting and starting modes (such as the flashing frequency and times or the running horse lamp mode) of the display lamp group; therefore, the total current of the display lamp group can be limited within a rated range, so that the stability of the lamp decoration in use is improved, the service life of the lamp decoration is prolonged, the visual brightness of the LED can be instantly improved under the condition that the electronic switch is switched on, the brightness felt by eyes can be still maintained by means of the visual persistence when the electronic switch is switched to the off state, the output of electric power is reduced, and the purposes of saving electricity and energy and protecting the environment are achieved.

Description

An improved light fixture for Christmas

technical field

The utility model relates to an improved lighting device for Christmas.

Background technique

At present, the LED (Light Emitting Diode, light-emitting diode) display lamp group (as shown in Figure 1) generally used as a light source, indicator light or device lamp, in order to prevent the LED from burning out during use, often needs to be connected in series in the circuit 10 A current-limiting resistor 20 can prevent the LED from burning out; however, once the display lamp group is applied in a high-power circuit environment, the resistor in the current-limiting resistor 20 will become a heating element and directly affect the internal parts and cause the internal parts to be burned , which in turn will reduce the service life of the display lamp group and increase maintenance costs; in addition, the current limiting resistor 20 consumes excess energy by heating, so it consumes more power during use.

Utility model content

The main purpose of the utility model is to provide an improved lighting device for Christmas, which can increase the service life of the display lights and reduce maintenance costs.

The utility model provides an improved lighting device for Christmas, including:

A display lamp group composed of light-emitting diodes LED, the display lamp group is controlled by an electronic switch, a microcontroller and a switching power supply with over-current protection and over-power protection characteristics, the switching power supply Cooperate with the electronic switch to set and control the lighting mode of the display lamp group; wherein, the microcontroller controls the on/off state of the electronic switch; the microcontroller also controls The switching power supply limits the total current of the display lamp group within a rated range, and provides a power supply system with a certain power for the display lamp group.

The utility model utilizes the switching power supply with the functions of over-current protection and over-power protection, so that the total current of the display lamp group is limited within a rated range, and there is no need to perform current-limiting operation on the electronic switch, which can prevent traditional The heating of the current-limiting resistor can reduce the pressure drop of the internal resistance of the electronic switch itself or the trouble of burning parts or shortening the life due to the temperature rise caused by the voltage drop of the traditional current-limiting resistor, so as to improve the stability and service life of the lighting. When the electronic switch is turned on, the current of the LED can be instantly increased, making its visual brightness much higher than the visual brightness of the LED under the traditional use of a current-limiting resistor; making the display lamp group switch to the off state when the electronic switch is turned off At times, you can still rely on persistence of vision to maintain the brightness perceived by the eyes, so as to reduce the output of electric power, and then achieve the environmental protection purpose of saving electricity and energy.

The utility model not only avoids the problem that the internal parts of the display lamp group are easily burned or the service life is reduced due to the use of the current-limiting resistor, but also saves more power and energy than the traditional display lamp group using the current-limiting resistor.

Description of drawings

Figure 1 is a circuit diagram of a traditional LED with a current limiting resistor;

Fig. 2 is the application equivalent circuit diagram of LED switch in the utility model;

Fig. 3 is the schematic block diagram of application circuit in the utility model;

Figure 4 is a schematic diagram of the arrangement of display lamp groups in the utility model;

Fig. 5 is the schematic block diagram of circuit in the utility model;

Fig. 6 is the schematic block diagram of circuit action in the utility model;

Fig. 7 is the V-I curve comparison figure of the LED among the utility model and the LED of traditional use current-limiting resistance;

Fig. 8 is the brightness waveform comparison chart 1 of the LED in the utility model and the LED using the traditional current-limiting resistor;

Fig. 9 is the comparison diagram 2 of the brightness waveform of the LED in the present invention and the traditional LED using a current-limiting resistor.

Marks in the figure: 30-display lamp group; 31-LED; 40-electronic switch; 50-microcontroller; 60-switching power supply.

Detailed ways

A preferred embodiment of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Fig. 2 shows the application equivalent circuit diagram of the LED switch in the utility model (please refer to Fig. 3-Fig. Christmas, etc.) are arranged into various patterns (such as Christmas trees, etc.); electronic switches 40 (can be set as MOSFET or transistors, etc.), are used to control the display lamp group 30; MCU Control (MicroController Unit Control, micro-control unit controller) microcontroller 50; and a switching power supply 60 (abbreviated as SPS) with over-current protection (OCP) and over-power protection (OPP) functions, the switching power supply 60 and the electronic switch 40 are controlled by the microcontroller 50, and the switching power supply 60 cooperates with the electronic switch 40 to set and control the lighting mode of the display lamp group 30 (such as flicker frequency and times or presented as a marquee).

When the electronic switch 40 (as shown in FIG. 6 ) is in a fully turned-on state, the current will rise instantaneously. At this time, the over-power protection (OPP) module of the switching power supply 60 presents a short-circuit current; then the over-current protection ( The OCP) module receives a message from the microcontroller 50 to limit the output current within a predetermined value range to avoid damage caused by excessive load current, and at the same time lower the voltage to about 3.8V to approach the operating voltage value of the lamp group 30 Vf (as shown in Figure 7, A is the application range of the present invention, the voltage value loaded on the lamp group 30 can be higher than its working voltage Vf, and B is the general application range). Through the above operations, using the switching power supply 60 with over-current protection (OCP) and over-power protection (OPP) functions, the total current of the display lamp group 30 can be limited within a rated range to prevent traditional current limiting The heating of the resistance causes the parts to burn out, thereby improving the stability of the lighting in use and prolonging the service life of the lighting.

The brightness of each LED31 in the display lamp group 30 is proportional to the conduction current, and then utilizes the V-I (voltage-current) characteristics of the LED31 itself in the display lamp group 30, that is, the characteristics of a slight increase in voltage and a rapid increase in current. When the electronic switch 40 is in the conduction state, the visual brightness of the LED31 can be instantly increased to make it higher than the visual brightness of the LED31 when the traditional current-limiting resistor is used; The waveform corresponding to the time, B is the waveform corresponding to the time of the voltage at both ends of the LED31 when the current limiting resistor is generally used, where the power consumption A=B, but the visual brightness A>>B.

The display lamp group 30 can still rely on the persistence of vision to maintain the brightness perceived by the eyes when the electronic switch is switched to the off state, so as to reduce the output of electric power, so that the display lamp group 30 can be provided by the switching power supply 60 A certain power supply system does not need to perform current limiting operation on the electronic switch 40, thus reducing the voltage drop of the internal resistance of the electronic switch 40 itself or the temperature rise caused by the voltage drop of the traditional current limiting resistor; as shown in Figure 9, A In order to display the waveform of the voltage corresponding to the time at both ends of the LED31 in the lamp group 30, B is the waveform of the voltage corresponding to the time at the two ends of the LED31 when a current limiting resistor is generally used, wherein the power consumption A<<B, but the visual brightness A=B; thus, It can also achieve the environmental protection purpose of saving electricity and energy.

The above-mentioned content is only a feasible embodiment of the utility model, and the scope of implementation of the utility model cannot be limited by it. The improved lighting device provided by the utility model, which can be used for Christmas, is also applicable to LED lighting And LED lamps; all equal changes and modifications done according to the patent scope of the utility model should all belong to the scope of protection of the utility model patent.

Claims (8)

1, a kind of improvement lamp decoration device of using Christmas that can be is characterized in that, comprising:

One electronic switch;

The one display lamp group who forms by LED, this display lamp group is controlled by described electronic switch;

One has the switched power supplier of overcurrent protection and overpower protection characteristic, and this switched power supplier matches with described electronic switch to set and to control described display lamp group's the bright mode that opens;

One microcontroller, conducting/the closed condition of the described electronic switch of this microprocessor control, and the described switched power supplier of this microprocessor control is limited in the specified scope described display lamp group's total current, and the power-supply system that certain power is provided for described display lamp group.

2, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that described electronic switch can be made as metal-oxide layer-semiconductor-field-effect transistor MOSFET.

3, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that described electronic switch can be made as electric crystal.

4, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that, described display lamp group can be arranged in various pattern modelling of doing something for the occasion according to the difference of festival celebration.

5, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that, described microcontroller can be made as micro-control unit controls device MCU Control.

6, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that described display lamp group is series limiting resistor not.

7, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that, the voltage that described display lamp group two ends load is higher than its operating voltage.

8, the improvement lamp decoration device of using Christmas that can be according to claim 1 is characterized in that, the described improvement lamp decoration device of using Christmas that can be also throws light on and the LED light fixture applicable to LED.

Images