Disclosure of Invention
Based on this, it is necessary to solve the problem of the prior art that the brightness is lowered due to the low voltage of the LED lamp string or LED lamp at the far end of the line loss.
An LED lighting device, the LED lighting device comprising: the LED module comprises a constant current driving chip and a first LED lamp bead electrically connected with an output pin of the constant current driving chip, wherein a power input pin of the constant current driving chip is used for being connected with an external second LED lamp bead so that the current in the second LED lamp bead reaches the preset current output by the constant current driving chip
Further, the LED lamp comprises a substrate and a packaging layer, wherein the first LED lamp beads and the constant current driving chip are fixed on the substrate, the packaging layer is arranged on the substrate and used for covering the constant current driving chip and the first LED lamp beads, and power input pins of the constant current driving chip are led out of the packaging layer and used for being connected with external second LED lamp beads.
Specifically, the light emitting diode module comprises a plurality of light emitting diode units, wherein the light emitting diode units comprise the constant current driving chip and the first light emitting diode lamp beads, wherein the constant current driving chip and the first light emitting diode lamp beads are fixed on the substrate and covered by the packaging layer.
Specifically, the light emitting diode modules are multiple, and the light emitting diode modules are connected in parallel.
A light emitting diode unit, comprising: the LED comprises a constant current driving chip, a first LED lamp bead, a substrate and a packaging layer;
the first LED lamp bead and the constant current driving chip are fixed on the substrate, and the output end of the constant current driving chip is connected with the output end of the LED lamp bead;
The packaging layer is arranged on the substrate and used for covering the constant current driving chip and the first light emitting diode lamp beads;
And a power input pin of the constant current driving chip is led out from the packaging layer and is used for being connected with an external second light-emitting diode lamp bead so that the current in the second light-emitting diode lamp bead reaches the preset current output by the constant current driving chip.
Further, the encapsulation layer includes: a fluorescent film;
the fluorescent film coats the first LED lamp beads.
Further, the encapsulation layer further includes: a transparent resin;
The transparent resin coats the fluorescent film and the constant current driving chip.
Further, the light emitting diode lighting device includes: a fixed housing;
The fixed shell is used for fixing the first light-emitting diode lamp bead, the constant current driving chip, the substrate and the packaging layer.
Further, the stationary housing further comprises a light emitting window.
Further, the fixed shell further comprises a first bracket, a second bracket and a third bracket;
the input end of the first LED lamp bead, the power input pin and the grounding pin of the constant current driving chip are respectively fixed on the first bracket, the second bracket and the third bracket.
According to the LED lighting device and the LED unit, the power input pin of the constant current driving chip is connected with the second LED lamp beads, so that the voltage drop of the first LED lamp beads can be added into the internal voltage of the constant current driving chip, the internal voltage of the constant current driving chip is improved, and the constant current driving chip is further enabled to output preset constant current, so that the brightness of the LED lamp beads in the LED module is improved.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic circuit connection diagram of an LED lighting device according to an embodiment of the present invention, where the LED lighting device includes: at least one LED module 100, the LED module 100 includes a constant current driving chip 111 and a first LED lamp bead 112 electrically connected to an output pin of the constant current driving chip 111, and a power input pin of the constant current driving chip 111 is used for being connected to an external second LED lamp bead 120, so that a current in the LED lamp bead reaches a preset current output by the constant current driving chip.
In the embodiment of the invention, a plurality of LED modules are provided, and a plurality of LEDs are connected in parallel. In practical application, since a plurality of LED modules are connected in parallel, a problem that the brightness of the LED beads in the LED modules connected in parallel at the ends is reduced due to line loss occurs, where the second LED beads 120 are LED beads with reduced brightness in the LED modules due to the line loss in this embodiment, and the number of the second LED beads 120 may be one or more, and the specific number is not limited.
The principle of adjusting the brightness of the second lamp beads 120 using the constant current driving chip will be specifically described as shown in fig. 2, and fig. 2 shows the structure of the constant current driving chip 111. In this embodiment, after the power input pin of the constant current driving chip 111 is connected to the external second LED lamp bead, the voltage drop of the first LED lamp bead may be added to the voltage of the constant current driving chip 111 to increase the power voltage of the constant current driving chip 111, at this time, the power voltage of the constant current driving chip 111 is increased, so that the current output by the constant current driving chip 111 reaches the preset constant current, and the brightness of all the LED lamp beads in the LED lamp module is further increased.
The number of the second LED beads is not limited, and the position where the power input pin of the constant current driving chip 111 is connected to the second LED beads is not limited. In practical application, the first LED lamp beads are connected in series with the plurality of second LED lamp beads, and when the power input pin of the constant current driving chip 111 is connected with the second LED lamp beads, the first LED lamp beads and the plurality of second LED lamp beads may be connected in series between the constant current driving chip 111 and the second LED lamp beads, at this time, the power voltage of the constant current driving chip 111 may be increased, so that the constant current driving chip 111 outputs a preset constant current, and brightness is further improved. The connection position of the power input pins of the constant current driving chip 111 may be set according to actual line loss, which is not described herein.
According to the LED lighting device provided by the invention, the power input pin of the constant current driving chip is connected with the second LED lamp bead, so that the voltage drop of the first LED lamp bead can be added into the internal voltage of the constant current driving chip, the internal voltage of the constant current driving chip is improved, and the constant current driving chip is further enabled to output a preset constant current, so that the brightness of the LED lamp bead in the LED module is improved.
Further, as shown in fig. 3, the LED lighting device further includes: the LED lamp comprises a substrate 113 and a packaging layer 114, wherein the first LED lamp beads 112 and the constant current driving chip 111 are fixed on the substrate 113, the packaging layer 114 is arranged on the substrate 113 and used for covering the constant current driving chip 111 and the first LED lamp beads 112, and power input pins of the constant current driving chip 111 are LED out of the packaging layer 114 and used for being connected with external second LED lamp beads.
Specifically, the constant current driving chip 111 may be fixed to the substrate 113 by using an adhesive, and may be fixed by other fastening means, which is not limited herein. The substrate 113 may be a silicon substrate, an aluminum oxide substrate, a gallium nitride substrate, or an aluminum nitride substrate.
Specifically, as shown in fig. 4, fig. 4 is a schematic connection diagram of the constant current driving chip 111 and the first LED lamp beads 112 and the second LED lamp beads 120. The output pin OUT of the constant current driving chip 111 is connected to the output terminal N pin of the first LED lamp bead 112, the ground pin GND of the constant current driving chip 111 is grounded, and the power input pin VIN of the constant current driving chip 111 is LED OUT.
In one embodiment of the present invention, as shown in fig. 1 and 3, the LED module 100 includes a plurality of LED units 110. The LED unit includes a constant current driving chip 111 and a first light emitting diode lamp bead 112 fixed on a substrate 113 and covered by a package layer 114. The number of the LED units 110 in the LED module 100 is not limited, and the LED units 110 may be all or part of the LED modules 100.
In one embodiment of the present invention, the constant current driving chip 111 and the first LED lamp bead 112 in the LED module 100 are not packaged, as shown in fig. 5, in this embodiment, the power supply voltage of the constant current driving chip 111 may be increased by connecting the power supply input pin VIN of the constant current driving chip 111 with the input end of the second LED lamp bead 120, so that the constant current driving chip 111 outputs a preset current, so as to improve the brightness of the second LED lamp bead and the first LED lamp bead.
For example, in the embodiment shown in fig. 5, a plurality of LED modules are connected in parallel, the voltage of the whole string of LED beads in the terminal LED module is reduced due to the brightness of circuit loss, and by connecting the power input pin VIN of the constant current driving chip 111 with the input end of the LED bead L1, the power voltage of the constant current driving chip 111 is increased, so that the currents of the LED beads L1 and L2 can be increased, and the brightness is further improved.
Note that, in this embodiment, the specific position of the constant current driving chip 111 in the LED module is not limited, and may be the middle or two ends of a plurality of LED light beads in the LED module. The power input end of the constant current driving chip 111 may be connected with the input end of the second LED lamp bead according to actual situations, as shown in fig. 5.
The present invention provides an LED unit, as shown in fig. 3, comprising: a constant current driving chip 111, a first LED lamp bead 112, a substrate 113, and a package layer 114;
the first LED lamp beads 112 and the constant current driving chip 111 are fixed on the substrate 113, and the output ends of the constant current driving chip 111 are connected with the output ends of the LED lamp beads;
the packaging layer 114 is disposed on the substrate 113 and is used for covering the constant current driving chip 111 and the first LED lamp beads 112;
the power input pin of the constant current driving chip 111 is LED out from the packaging layer 114 and used for connecting with an external second LED lamp bead, so that the current in the second LED lamp bead reaches the preset current output by the constant current driving chip 111.
It should be noted that the number of the first LED beads is not limited, and preferably, the number of the first LED beads is 1.
Further, the LED unit further includes: a stationary housing 115;
the fixing case 115 fixes the first LED lamp bead 112, the constant current driving chip 111, the substrate 113, and the encapsulation layer 114.
The specific shape and material of the fixed housing 115 are not limited as long as the functions thereof can be achieved.
The stationary housing 115 further includes a first bracket, a second bracket, and a third bracket;
The input end of the first LED lamp bead 112, the power input pin of the constant current driving chip 111 and the grounding pin of the constant current driving chip 111 are respectively fixed on the first bracket, the second bracket and the third bracket.
The power input end, the grounding pin and the input end of the LED chip in the constant current LED lamp bead are respectively LED out through the first bracket, the second bracket and the third bracket on the fixed shell 115, so that the installation efficiency can be improved.
Optionally, the stationary housing 111 further comprises a light emitting window.
Optionally, the encapsulation layer further includes: fluorescent film 1141, fluorescent film 305 encapsulates the LED chip.
The fluorescent film 1141 is used for coating the LED chip, so that the black LED chip can be covered, and the beautiful effect is achieved in actual decoration.
Further, the constant current LED lamp bead further comprises: transparent resin 1142, transparent resin 1142 is embedded in fixed housing 115.
The transparent resin 1142 faces the light-emitting window, and the transparent resin 1142 is used for facilitating fixation and enabling light emitted by the LED to pass through the light-emitting window.
According to the LED unit provided by the invention, the power supply input pin of the constant current driving chip is connected with the second LED lamp bead outside, so that the power supply voltage of the constant current driving chip is increased, the constant current driving chip outputs the preset current, and the current of the second LED lamp bead is further increased, and the brightness of the LED unit is further improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.