EP2846073B1

EP2846073B1 - Ultrathin projecting lamp

Info

Publication number: EP2846073B1
Application number: EP13831925.6A
Authority: EP
Inventors: Xiaoyu CAI; Liang Zhang
Original assignee: Ningbo Yusing Optoelectronic Technology Co Ltd
Current assignee: Ningbo Yusing Optoelectronic Technology Co Ltd
Priority date: 2013-07-03
Filing date: 2013-12-27
Publication date: 2017-06-21
Anticipated expiration: 2033-12-27
Also published as: EP2846073A4; WO2015000279A1; EP2846073A1

Description

Field of the Patent Application

This patent application relates to the technical field of the spotlight, and particularly relate to a slim spotlight.

Background

The mounting method of the front cover and the body of the spotlight in the market usually uses the screw to pass through front cover and into the body. This design increases the thickness of the entire spotlight, and affects the beauty of the spotlight. The LED lamp beads of the existing spotlight require the regulator or constant current power supply, which also increases the thickness of the entire spotlight. To eliminate the power supply and make the product thinner will definitely satisfy the customer.
CN202791659 discloses a light emitting diode protection lamp which comprises a lamp body and an installation support. The lamp body comprises a lamp body front cover, a lamp body rear cover, a seal ring arranged between the lamp body front cover and the lamp body rear cover, an LED integration lamp bead and a driving power. A light hole is arranged in the lamp body front cover, and a glass cover plate is fixed on the light hole. The LED projection lamp also comprises lamp body angle regulators, wherein the lamp body angle regulators are arranged on two ends of the connection of the lamp body rear cover and the installation support, and angle regulating discs are arranged on two end surfaces of the lamp body angle regulators; and the lamp body rear cover is rotatably connected with the installation support.
CN102933005 discloses a circuit for an LED constant current power supply. In the circuit, an alternating current voltage is subjected to rectification by a rectifier bridge, and then is subjected to a filter to enable the waveform of an input voltage to be smooth; the input voltage is converted into a direct voltage after passing an electrolytic capacitor filter; the direct voltage is loaded on an LED after passing a constant-current IC chip; current range of the LED is adjusted by resistors R2 and R3, which are connected with the constant-current IC chip; and a constant-current IC chip protection circuit formed by a Zener diode ZD1, a triode Q1 and a resistor R1 is arranged between the electrolytic capacitor filter and the constant-current IC chip.
CN101404842 discloses a three-wire high power LED drive which is mainly used for driving a high power LED. The three-wire high power LED drive comprises an LED drive and a high power LED load. The LED drive is provided with three output wires which are an output anode, an output cathode and a signal control wire respectively. The high power LED load is connected between the output anode and the output cathode. S1 is a control switch. One end of the S1 is connected with the output anode, and the other end thereof is connected with the signal control wire. The signal control wire is connected with a diode anode in an LED drive opto-coupler U2 by a current-limiting resistor R10. The control switch S1, the signal control wire and the current-limiting resistor R10 form a low voltage control circuit together.

Summary

The object of the present patent application is to overcome the above deficiencies and provide a slim spotlight.
The present patent application provides a slim spotlight, including a surface cover, a glass plate, a rubber ring, a reflector cover, a light expansion hood, a waterproof ring, a bolt, a seal ring, a nut, a mounting bracket and a body. A LED circuit without power supply is set between the light expansion hood and the body, the rear side of the body has a plurality of screw holes, the screw holes pass through the body, the surface cover is provided with a plurality of hidden holes which match up with the screw holes. The output of the LED circuit includes a rectifier bridge, a safety capacitor, a piezoresistor and a filter capacitor, the safety capacitor is connected in series between a firing line and a null line; the piezoresistor is connected in series between the firing line and the null line; the input port of the rectifier bridge connects with the firing line and the null line; the output port of the rectifier bridge connects the positive lead of the filtering capacitor; the input port of the LED circuit connects a number of high-voltage LED lamp beads in series. In one aspect of the present patent application, a fuse is connected in series between the firing line and the safety capacitor, wherein the fuse is a self-resettable fuse.
In another aspect of the present patent application, the rectifier bridge is a surface mount device.
In another aspect of the present patent application, the filter capacitor connects in parallel with a current-limiting resistor.
In another aspect of the present patent application, the negative lead of the high-voltage LED lamp bead connects in series with a diode.
In yet another aspect of the present patent application, the diode is a SMT packaged constant current diode.
The slim spotlight of the patent application has the following advantages: the slim spotlight adopts a plurality of screw holes on the back of the body to mount the surface cover. This assembly method offers a large light emitting area, and ensures a slim outer housing. The electrical circuit of the slim spotlight uses the high-voltage LED lamp beads and eliminates the power supply, which makes the slim spotlight thinner and lighter.

Brief Descriptions of the Drawings

Figure 1 is an exploded view of a slim spotlight according to one embodiment of the present patent application.
Figure 2 is a rear view of the body of the slim spotlight of the present patent application.
Figure 3 is a rear view of the surface cover of the slim spotlight of the present patent application.
Figure 4 is the circuit diagram of the output port of the LED of the present patent application.
Figure 5 is the circuit diagram of the intput port of the LED of the present patent application.

Detailed Description

Reference will now be made in detail to a preferred embodiment of the slim spotlight disclosed in the present patent application, examples of which are also provided in the following description. Exemplary embodiments of the slim spotlight disclosed in the present patent application are described in detail, although it will be apparent to those skilled in the relevant art that some features that are not particularly important to an understanding of the slim spotlight may not be shown for the sake of clarity. The following examples are used to illustrate the present patent application but not intended to limit the scope of the present patent application.
Referring to Figures 1-5, a slim spotlight includes a surface cover 1, a glass plate 2, a rubber ring 3, a reflector cover 4, a light expansion hood 5, a waterproof ring 6, a bolt 7, a seal ring 8, a nut 9, a mounting bracket 10 and a body 11. A LED circuit 14 without power supply is set between the light expansion hood 5 and the body 11. The rear side of body 12 has a plurality of screw holes 12. The screw holes 12 pass through the body 11. The surface cover 1 is provided with a plurality of hidden holes 13 which match up with the screw holes 12.
The output port of the LED circuit 14 includes a rectifier bridge U1, a safety capacitor X1, a piezoresistor V1 and a filter capacitor C1, the safety capacitor X1 is connected in series between the firing line L and the null line N. The piezoresistor V1 is connected in series between the firing line L and the null line N.
The input port of the rectifier bridge U1 connects with the firing line L and the null line N. The output port of the rectifier bridge U1 connects the positive lead of the filtering Capacitor C1. The input port of the LED circuit 14 connects a number of high-voltage LED lamp beads D1 ∼ D8 in series. In this embodiment, the null line N connects in series with a resistor R3 with small resistance value.
A fuse F1 is connected in series between the firing line L and the safety capacitor X1. The fuse F1 is a self-resettable fuse.
The rectifier bridge U1 is preferably a surface mount device.
The filter capacitor C1 connects in parallel with current-limiting resistors R1 and R2.
The negative lead of the high-voltage LED lamp bead D8 connects in series with a diode DP 1.
The diode DP1 is preferably a SMT constant current diode.
The slim spotlight adopts a plurality of screw holes on the back of the body to mount the cover, which offers a large lightemitting area and ensures a slim outer housing. The maximum thickness of the entire slim spotlight is only 25mm, which is slimmer than the existing similar products. The electrical circuit of the slim spotlight uses the high-voltage LED lamp beads, which eliminates the power supply and makes the slim spotlight thinner and lighter.
The above are only preferred embodiments of the present patent application, it should be understood that the slim spotlight disclosed in the present patent application is not limited to the precise embodiments described above and that various changes and modifications thereof may be effected by one skilled in the art without departing from the scope of the protection. For example, elements and/or features of different illustrative embodiments may be combined with each other and/or substituted for each other within the scope of this disclosure.

Claims

A slim spotlight comprising a surface cover (1), a glass plate (2), a rubber ring (3), a reflector cover (5), a light expansion hood (5), a waterproof ring (6), a bolt (7), a seal ring (8), a nut (9), a mounting bracket (10) and a body (11), characterizing in that a LED circuit (14) without power supply is set between the light expansion hood (5) and the body (11), a rear side of the body (11) has a plurality of screw holes (12), the screw holes pass through the body (11), the surface cover (1) is provided with a plurality of hidden holes (13) which match up with the screw holes; the output port of the LED circuit (14) comprises a rectifier bridge (U1), a safety capacitor (X1), a piezoresistor (V1) and a filter capacitor (C1), the safety capacitor (X1) is connected in series between a firing line and a null line; the piezoresistor is connected in series between the firing line (L) and the null line (N); an input port of the rectifier bridge (U1) connects with the firing line (L) and the null line (N); an output of the rectifier bridge (U1) connects a positive lead of the filtering capacitor (C1); a negative lead of the filtering capacitor (C1) connects the ground; the output of the rectifier bridge (U1) directly connects the output port of the LED circuit (14); an input port of the LED circuit (14) connects a number of high-voltage LED lamp beads (D1-D8) in series.
The slim spotlight of claim 1, characterizing in that a fuse (F1) is connected in series between the firing line (L) and the safety capacitor (X1), wherein the fuse (F1) is a self-resettable fuse.
The slim spotlight of claim 1, characterizing in that the rectifier bridge (U1) is a surface mount device.
The slim spotlight of claim 1, characterizing in that the filter capacitor (C1) connects in parallel with a current-limiting resistor (R1, R2).
The slim spotlight of any one of claims 1-4, characterizing in that a negative lead of the high-voltage LED lamp bead (D1-D8) connects in series with a diode (DP1).
The slim spotlight of claim 5, characterizing in that the diode (DP1) is a SMT constant current diode.