CN202188319U

CN202188319U - Light-emitting diode (LED) light pipe with high lighting effect

Info

Publication number: CN202188319U
Application number: CN2010206705554U
Authority: CN
Inventors: 苏睿
Original assignee: RYDON LED LIGHTING CO Ltd
Current assignee: RYDON LED LIGHTING CO Ltd
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2012-04-11
Anticipated expiration: 2020-12-20

Abstract

The utility model provides a light-emitting diode (LED) light pipe with high lighting effect, which comprises a radiating casing, a circuit board (1), an LED array (2), a lamp shade and a first end cover (3.1) and a second end cover (3.2) arranged at two ends of the circuit board (1). The LED array (2) is a single-line LED array composed of LED lamp wicks with large lighting angles, and a diffusing reflection layer is coated on the circuit board (1), so that black shadow phenomena existing between different lines of the existing LED are completely removed. Further, the LED lamp wicks are large in lighting angle, the diffusing reflection layer of the circuit board has light distribution effect, lighting angles after secondary light distribution through a light cover are proper, and the diffusing reflection layer improves lighting effect. The LED array is divided into a plurality of groups, each group is independently controlled through a constant-current integrated circuit (IC), and service life of the LED light pipe is ensured while the lighting effect is provided.

Description

A kind of high light efficiency LED light pipe

Technical field

The utility model relates to lighting technical field, is specifically related to a kind of high light efficiency LED light pipe.

Background technology

In recent years, the LED light fixture receives much concern because of characteristics such as its energy-saving and environmental protection, efficient are high, volume is little, the life-span is long.The LED light fixture is replacing traditional incandescent lamp and fluorescent tube as the main flow illuminations.Meanwhile, along with the development of clean energy resource efficiency techniques and the continuous enhancing of people's environmental consciousness, increasing civilian and commercial LED light fixture has obtained popularizing.

As one of main application form of LED, the LED light pipe is also constantly being popularized.But; Existing LED light pipe generally all adopts the led array that is not less than 2 row; Two circuit boards 150 that as shown in Figure 1, a kind of LED light pipe 100 in existing comprises heat-dissipating casing 110, lampshade (figure does not show), is positioned at the end cap 120 at said heat-dissipating casing 110 and lampshade two ends, be electrically connected through electrical connector 145, be positioned at the LED lamp pearl 170 on said two circuit boards 150, the driving (scheming not show) that is positioned at the contact pin 180 on the said end cap 120 and is connected with two circuit boards 150 respectively.

This LED light pipe adopts two row LED to form array format, and directly adopts single driving to unify power supply, and the current stabilization performance is not good, influences the whole light efficiency of LED light pipe easily.

Because the LED lighting angle smaller usually (as 30 °, 40 °) that is adopted, after realizing illumination, there is shadow easily in the zone between the two row LED.Simultaneously, because the light of the front surface of two circuit boards 150 itself reflects, diffusive is bad, also influenced the light efficiency of LED light pipe.

In addition, existing LED light pipe adopts built-in dc source to drive usually, and its driving is arranged within the two end cap 120 of light pipe usually, perhaps is positioned within the heat-dissipating casing 110, makes that the volume of whole light pipe is excessive, and weight also has to be reduced.

The utility model content

The purpose of the utility model is to overcome weak point of the prior art, and a kind of high light efficiency LED light pipe is provided, and this LED light pipe adopts the LED wick of big lighting angle to form the single file led array; And be coated with diffuse reflector on the circuit board; Eliminated the phenomenon that has shadow between the existing middle different LED row fully, and LED wick lighting angle is big, the diffuse reflector of circuit board also plays the luminous intensity distribution effect; Lighting angle behind the soft light cover secondary light-distribution is moderate, and diffuse reflector has also improved light efficiency.

The purpose of the utility model realizes through following technical scheme: a kind of high light efficiency LED light pipe; Comprise heat-dissipating casing; Circuit board (1), led array (2) and lampshade are positioned at first end cap (3.1) and second end cap (3.2) at circuit board (1) two ends; The single file led array that said led array (2) is formed for the LED wick that adopts big lighting angle, said circuit board is coated with diffuse reflector on (1).

Said dc source drives and places outside the LED light pipe, also promptly adopts external power supply, effectively reduces the volume and weight of light pipe.

The lighting angle of said LED wick preferably is not less than 140 °.

Said led array (2) is not less than 140 ° LED wick by n * m lighting angle to be formed, wherein, and n＜m, and be natural number;

Said circuit board (1) is provided with: non-polar first bridge heap of out-put supply (4.1), second bridge heap (4.2), first filter capacitor (c1), second filter capacitor (c2), and n current stabilization IC; First bridge heap (4.1) connects the live wire of dc source through first end cap (3.1); Second bridge heap (4.2) connects the zero line of dc source through second end cap (3.2); Connect first filter capacitor (c1) between positive and negative two output lines of first bridge heap (4.1); Connect second filter capacitor (c2) between positive and negative two output lines of second bridge heap (4.2); Two negative poles of first bridge heap (4.1), second bridge heap (4.2) directly connect, and each current stabilization IC is provided with working power input (VDD), earth terminal (GND) and output current control end (ADJ);

The working power input (VDD) of each current stabilization IC is received the forward transportation outlet of first bridge heap (4.1) respectively through a resistance R 1; And its output current control end (ADJ) is received the forward transportation outlet of first bridge heap (4.1) successively through a resistance R 2, resistance R 1, and earth terminal (GND) is connected on the negative output utmost point connecting line between first bridge heap (4.1), second bridge heap (4.2); Each current stabilization IC all is provided with current output terminal mouth (out), and current output terminal mouth (out) is connected the back with the series arm that m LED wick formed and inserts in the forward transportation outlet of second bridge heap (4.2).

In the such scheme; R1 directly links working power input (VDD) on the one hand; Current stabilization IC is played the voltage stabilization and current stabilization power supply function, on the other hand, link output current control end (ADJ) through connecting with R2; With the output current of control current output terminal mouth (out), and then play the effect of controlling LED wick series arm.

Preferably, said n=4, m=33, each current stabilization IC is provided with 3 current output terminal mouths (out), and each current output terminal mouth (out) all is connected with the series arm that 11 LED wicks are formed.

The utility model is following with respect to the beneficial effect of existing technology: this LED light pipe adopts the LED wick of big lighting angle to form the single file led array; And be coated with diffuse reflector on the circuit board; Eliminated the phenomenon that has shadow between the existing middle different LED row fully, and LED wick lighting angle is big, the diffuse reflector of circuit board also plays the luminous intensity distribution effect; Lighting angle behind the soft light cover secondary light-distribution is moderate, and diffuse reflector has also improved light efficiency.Led array is divided into some groups, and every group has a current stabilization IC independently to control, when light efficiency is provided, also guaranteed working life.

Description of drawings

Fig. 1 is the stereogram of existing LED light pipe;

Fig. 2 is the structure principle chart of the light pipe of LED shown in the embodiment;

Fig. 3 is the circuit theory diagrams of the light pipe of LED shown in the embodiment.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but the embodiment of the utility model is not limited thereto.

Embodiment

A kind of high light efficiency LED light pipe; As shown in Figure 2, comprise heat-dissipating casing (figure does not show), circuit board (1); Led array (2) and lampshade (figure does not show); Be positioned at first end cap (3.1) and second end cap (3.2) at circuit board (1) two ends, the single file led array that said led array (2) is formed for the LED wick that adopts big lighting angle is coated with diffuse reflector (figure does not show) on the said circuit board (1).

Said dc source drives and places outside the LED light pipe, also promptly adopts external power supply.

As shown in Figure 3, led array (2) is that 140 ° LED wick is formed by 4 * 33 lighting angles.

Circuit board (1) is provided with: non-polar first bridge heap of out-put supply (4.1), second bridge heap (4.2), first filter capacitor (c1), second filter capacitor (c2), and 4 current stabilization IC; First bridge heap (4.1) connects the live wire of dc source through first end cap (3.1); Second bridge heap (4.2) connects the zero line of dc source through second end cap (3.2); Connect first filter capacitor (c1) between positive and negative two output lines of first bridge heap (4.1); Connect second filter capacitor (c2) between positive and negative two output lines of second bridge heap (4.2); Two negative poles of first bridge heap (4.1), second bridge heap (4.2) directly connect, and each current stabilization IC is provided with working power input (VDD), earth terminal (GND) and output current control end (ADJ);

The working power input (VDD) of each current stabilization IC is received the forward transportation outlet of first bridge heap (4.1) respectively through a resistance R 1; And its output current control end (ADJ) is received the forward transportation outlet of first bridge heap (4.1) successively through a resistance R 2, resistance R 1, and earth terminal (GND) is connected on the negative output utmost point connecting line between first bridge heap (4.1), second bridge heap (4.2); Each current stabilization IC all is provided with 3 current output terminal mouths (out1, out2, out3), and each current output terminal mouth (out) is connected the back with the series arm that 11 LED wicks are formed and inserts in the forward transportation outlet of second bridge heap (4.2).

The foregoing description is the utility model preferred implementation; But the embodiment of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection domain of the utility model.

Claims

1. high light efficiency LED light pipe; It is characterized in that: comprise heat-dissipating casing; Circuit board (1), led array (2) and lampshade are positioned at first end cap (3.1) and second end cap (3.2) at circuit board (1) two ends; The single file led array that said led array (2) is formed for the LED wick that adopts big lighting angle, said circuit board is coated with diffuse reflector on (1).

2. high light efficiency LED light pipe according to claim 1 is characterized in that: said dc source drives and places outside the LED light pipe.

3. high light efficiency LED light pipe according to claim 1 is characterized in that: the lighting angle of said LED wick is not less than 140 °.

4. high light efficiency LED light pipe according to claim 3 is characterized in that: said led array (2) is not less than 140 ° LED wick by n * m lighting angle to be formed, wherein, and n＜m, and be natural number.

5. high light efficiency LED light pipe according to claim 4; It is characterized in that: said circuit board (1) is provided with: non-polar first bridge heap of out-put supply (4.1), second bridge heap (4.2); First filter capacitor (c1), second filter capacitor (c2), and n current stabilization IC; First bridge heap (4.1) connects the live wire of dc source through first end cap (3.1); Second bridge heap (4.2) connects the zero line of dc source through second end cap (3.2); Connect first filter capacitor (c1) between positive and negative two output lines of first bridge heap (4.1); Connect second filter capacitor (c2) between positive and negative two output lines of second bridge heap (4.2); Two negative poles of first bridge heap (4.1), second bridge heap (4.2) directly connect, and each current stabilization IC is provided with working power input (VDD), earth terminal (GND) and output current control end (ADJ);

6. high light efficiency LED light pipe according to claim 5 is characterized in that:

Said n=4, m=33, each current stabilization IC is provided with 3 current output terminal mouths (out), and each current output terminal mouth (out) all is connected with the series arm that 11 LED wicks are formed.