A kind of LED high voltage and constant current waterproof advertisement light box backlight
The utility model relates to a kind of advertisement and identifier lamp box LED-backlit technology, and a kind of LED high voltage and constant current waterproof advertisement light box backlight is provided.
At present, what the used lamp box backlight of advertisement and identifier industry mainly adopted is the technical scheme of not constant current of low pressure, and there is following problem in it:
The LED driving voltage is low, and because there being problem of pressure drop, the fed distance of LED power supply is shorter, so the LED power supply must be installed near the LED module, just so that the LED power supply just often is operated in the open-air situation, this just requires the LED power supply must possess the sun-proof ability of good waterproof, and LED power supply cost raises.
What circuit adopted is the technology of not constant current, and the decay of voltage causes the LED electric current different, and front and back brightness is difficult to consistent.
Voltage is low, and electric current is high, and decay is just large, so just need to connect more power line, trouble is installed.
In a word, there is following shortcoming in this scheme: power supply distance is short, electric current is high, voltage antidamping ability, and connection line is many, installation cost is high, front and back brightness is difficult consistent, and reliability is lower, and spoilage is higher, especially maintenance is very difficult, and the utility model of LED high voltage and constant current light-negative source of advertisement lamphouse has well solved above problem.
The utility model content
The purpose of this utility model is to provide a kind of LED high voltage and constant current waterproof advertisement light box backlight.
The utility model is to achieve these goals by the following technical solutions:
A kind of LED high voltage and constant current waterproof advertisement light box backlight, it is characterized in that: comprise the high voltage and constant current wiring board, " [" type groove structure shell, shell " be fixed with the led circuit plate in [" type groove, the shell two ends are fixed with Wire connection slot, lead to power line in the described Wire connection slot, the both positive and negative polarity of described power line circuit board connects.
In the such scheme, adopt high pressure 48V power supply during described led circuit plate design, and used two LC1912 constant current chips to provide driving for LED, formed unique dual fail-safe loop design.
In the such scheme, described Wire connection slot is provided with the small column for the projection that positions with wiring board.
In the such scheme, also comprise water-proof silica-gel, described water-proof silica-gel is attached to above the wiring board.
In the such scheme, be provided for the installing hole that is fixed on the lamp box rectangular on the described Wire connection slot.
In the such scheme, also comprise screw, the both positive and negative polarity of described power line wiring board connects by screw.
The utlity model has following beneficial effect:
One, the utility model adopts high pressure 48V power supply, and the utility model adopts high pressure 48V power supply, and electric current reduces by 75% with respect to the 12V power voltage supply, and voltage decay on the line is corresponding to reduce by 75% thereby make;
Two, the utility model has adopted constant-current drive technology, and constant current accuracy makes lamp box surface brightness uniformity up to 2%,
Three, the utility model adopts constant-current drive technology, and the circuital current fluctuation is little, so the LED longer service life, light decay is less;
Four, the utility model adopts imported with original packaging LC1912 constant current chip peripheral component few, and cost is low;
Five, the utility model antidamping ability is strong, especially is fit to remote power-feeding, and voltage attenuation reaches as high as 9V, and brightness is constant;
Six, the utility model has adopted two LC1912 constant current chips to form unique dual fail-safe loop design, and work independent of one another is independent of each other, and reliability is high, greatly reduces the product repairing rate;
Seven, the utility model adopts between whole screen shipment mode, set of hanging scrolls distance fixing, easy for installation, and is quick;
Eight, the utility model circuit board top is attached with water-proof silica-gel, even also can not cause short circuit so that rainwater is invaded in the casing, thereby has strengthened whole service life and the adaptability of equipment;
Nine, the utlity model has energy-saving and environmental protection, brightness height, replace traditional fluorescent lamp.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams;
Fig. 2 is single integral piece structure chart of the present utility model;
2-Wire connection slot, 2-power line, 3-screw, 4-plastic casing, 5-circuit board, 6-constant current chip among the figure.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
This LED high voltage and constant current waterproof advertisement light box backlight as shown in Figure 1, comprise the LED wiring board, described led circuit plate adopts high pressure 48V power supply, and form unique dual fail-safe loop designs with two imported with original packaging constant current chip LC1912, be used for fixing circuit board " [" type groove structure shell, described shell two ends are fixed with Wire connection slot with screw, there is the small column of a projection Wire connection slot inside, is used for positioning with wiring board.Also be provided with installing hole above the Wire connection slot, be used for being fixed on above the lamp box rectangular.Also comprise power line, power line drawing in the Wire connection slot, the power line part that is built in the Wire connection slot links to each other with the both positive and negative polarity of wiring board by screw.
The utlity model has following characteristics:
One, the utility model in actual use can be according to the requirement of client to brightness, and line length can be customized.
Two, because utility model adopts the LED of low energy as light source, make its than the about power consumption of traditional fluorescent lamp tube coupling up to 70%.
Three, unique dual fail-safe loop design has improved the reliability of product greatly.
Four, antidamping ability is strong, especially is fit to remote power-feeding, and voltage attenuation reaches as high as 9V, but brightness is constant.
Five, the quality guarantee time limit: 4 years or 20000 hours.
Six, adopt high pressure, output voltage only has 48V, and human body is belonged to safe voltage.
Seven, the utility model adopts silica gel to be attached to lamp bar upper and lower side, makes it possess good waterproof ability, has increased the adaptive capacity of product to environment, classification of waterproof: IP67.