KR20150024503A - Light source module and illuminating device having the same - Google Patents

Abstract

Disclosed is a light source module capable of reducing manufacturing costs and reliability and having superior light efficiency. The light source module includes a power line, light emitting devices which are connected in series on the power line, an IC which supplies uniform driving currents to the light emitting devices, and an IC driving line which is connected to the light emitting devices and the IC. It not only reduces manufacturing costs but also improves reliability.

Description

TECHNICAL FIELD [0001] The present invention relates to a light source module,

The present invention relates to a light source module, and more particularly, to a light source module that has excellent light efficiency, can reduce manufacturing cost, and can improve reliability, and a lighting device having the same.

BACKGROUND ART An illumination device is a self-light-emitting device including a light source that emits light, and lamps, light-emitting diodes, and the like are widely used. An illumination device using a lamp is an optical member which is disposed on a side surface and converts it into a surface light, or a structure that is spaced from the front surface by a certain distance is generally used.

However, the lighting apparatus using the lamp has a problem that it is difficult to keep the brightness of the lamp constant according to the driving time and the surrounding environment. In particular, a general lighting apparatus has a problem that reliability is lowered due to a luminance difference between a region in which the lamp is disposed and a region in which the lamp is not disposed, and a large number of lamps are provided for high brightness to increase power consumption, There was a problem.

Further, the lighting apparatus using the lamp has a problem in that maintenance and repair such as replacement work are costly due to a short life span, and it is difficult to make it slim.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light source module having excellent light efficiency and a lighting apparatus having the same.

Another object of the present invention is to provide a light source module capable of reducing manufacturing cost as well as reliability and a lighting device having the same.

The light source module according to embodiments of the present invention includes a power supply line; A plurality of light emitting devices connected in series on the power supply wiring; An IC for supplying a uniform driving current to the plurality of light emitting devices; And an IC driving wiring connected to the IC and the plurality of light emitting devices, and has an advantage of being excellent in light efficiency, reducing manufacturing cost, and improving reliability.

The light emitting device includes one first light emitting device including the IC and at least two second light emitting devices that do not include the IC.

The IC is connected between the positive polarity power supply wiring and the negative polarity power supply wiring of the power supply wiring, and the IC and the light emitting devices form a closed loop with the IC driving wiring.

The light emitting device is focused within 10 degrees in the x-axis direction from the central axis at which light is emitted, and within 45 degrees in the y-axis direction perpendicular to the x-axis.

Each of the plurality of light emitting devices has a brightness of 120 ㏐ or more.

The plurality of light emitting devices may include a circuit board; A light emitting diode chip mounted on one surface of the circuit board; A mold part molded on one surface of the circuit board; And a lens portion positioned on the mold portion.

The mold part includes a receiving hole for receiving the lens part.

The lens unit has a hexagonal upper surface; Side surfaces of the hexagonal column extending from the upper surface; A receiving groove for receiving the light emitting diode chip; A convex portion positioned above the receiving groove; And a concave portion positioned between the side surfaces and the receiving groove.

And an inclined portion formed by the concave portion to surround the receiving groove by the concave portion.

And an uneven portion of the concavo-convex structure having an acid and a valley on the upper surface.

And a rounded round portion is formed between the adjacent side surfaces.

And a heat sink disposed on the other side of the circuit board.

According to another embodiment of the present invention, there is provided a lighting apparatus comprising: a screen for displaying a screen using light; And a light source module provided on at least one side of the inside of the screen, wherein the light source module includes a power source wiring, a plurality of light source devices connected in series on the power source wiring, IC; And an IC driving wiring connected to the IC and the plurality of light emitting devices.

The light source module may be located on sides symmetrical to each other within the screen.

The light source module of the present invention can be used in a lighting device which is required to have high brightness, stable constant voltage and constant current driving, stable and excellent heat dissipation, and high brightness and excellent reliability. For example, the light source module may be used for a large screen advertisement lighting device of 20 inches or more.

The lighting apparatus including the light source module has advantages in that it is lower in manufacturing cost than a lighting apparatus having a general lamp, and maintains uniform brightness even in a driving time or a change in the surrounding environment, thereby improving the reliability of the lighting apparatus.

Further, the present invention has an advantage that the cost of maintenance and the like can be reduced with a longer lifetime than a lighting apparatus provided with a general lamp.

Further, the present invention has an advantage that it can be driven at a significantly lower power consumption than a lighting apparatus provided with a general lamp.

In addition, since the present invention uses a thin-type light-emitting diode chip rather than a lighting device having a general lymph, it has an advantage of being slim.

1 is a plan view showing a light source module according to an embodiment of the present invention.
2 is a perspective view illustrating the unit light emitting device of FIG.
3 is an exploded perspective view showing the unit light emitting device of FIG.
4 is a circuit diagram showing the light source module of FIG.
5 is a perspective view showing the lens unit of FIG. 2. FIG.
6 is a cross-sectional view of the lens section taken along the line I-I 'of FIG. 5;
7 is a view showing a vertical exit angle of a light source module according to an embodiment of the present invention.
8 is a view illustrating a horizontal exit angle of a light source module according to an embodiment of the present invention.
9 is a diagram illustrating a spectrum of a light source module according to an embodiment of the present invention.

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the shapes of components and the like can be exaggeratedly expressed. Like reference numerals designate like elements throughout the specification. Modifications of the components that do not depart from the technical scope of the present invention are not limited thereto and can be defined only by the description of the claims in order to clearly describe the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

FIG. 1 is a plan view showing a light source module according to an embodiment of the present invention, FIG. 2 is a perspective view illustrating the unit light emitting device of FIG. 1, and FIG. 3 is an exploded perspective view of the unit light emitting device of FIG.

1 to 3, the light source module 100 according to an embodiment of the present invention has a structure in which a plurality of light emitting devices are connected in series. For example, the light source module 100 may be composed of one module by connecting three light emitting devices in series. In the present invention, the light source module 100 composed of three light emitting devices is described in detail, but the number of the light emitting devices is not particularly limited.

The light source module 100 includes a power wiring 120 and an IC driving wiring 130. The plurality of light emitting devices may be connected in series by the power supply wiring 120.

The plurality of light emitting devices include a first light emitting device 110a including an IC 145 and a plurality of second light emitting devices 110b not including the IC 145. [

The first and second light emitting devices 110a and 110b include a circuit board 142, a light emitting diode chip 141, a mold unit 111, and a lens unit 160. The first and second light emitting devices 110a and 110b have high brightness. For example, the first and second light emitting devices 110a and 110b have a high brightness of more than 120 cd / m 2. The first and second light emitting devices 110a and 110b may be used in a 20 or more surface-emitting illumination device requiring high brightness. For example, the first and second light emitting devices 110a and 110b may be used in a lighting apparatus of a screen advertisement.

The light emitting diode chip 141 may be located in a central region of the circuit board 142.

The lens unit 160 covers the center region of the circuit board 142 including the LED chip 141. The lens unit 160 guides light emitted from the light emitting diode chip 141 to be concentrated within 10 degrees in the x-axis direction and within 45 degrees in the y-axis direction from the central axis. Here, the x-axis is defined as an axis perpendicular to the arrangement direction of the first and second light emitting devices 110a and 110b with respect to the light emitting direction of the light source module 100. [ The x-axis direction may correspond to the direction of the mountain and the valley of the concave-convex portion formed on the upper surface of the lens portion 160. The y-axis is defined as a horizontal axis with respect to the arrangement wandering of the first and second light emitting devices 110a and 110b with respect to the light emitting direction of the light source module 100. [ The y-axis direction may correspond to an image of the concave-convex portion formed on the upper surface of the lens portion and a direction perpendicular to the shape direction of the trough.

The lens unit 160 and the circuit board 142 may include hook structures or protrusions and grooves for aligning the lens unit 160.

The mold part 111 is formed on the upper surface of the circuit board 142. The mold part 111 has a function of fixing the lens part 160 and protecting the light emitting diode chip 141 and the circuit board 142 from the outside. The mold part 111 includes a receiving hole 113 in which the lens part 160 is received.

The first light emitting device 110a is mounted on the circuit board 142 with the IC 145 and the driving elements 146 mounted thereon. The first light emitting device 110a on which the IC 145 is mounted is capable of single driving. Specifically, the light source module 100 of the present invention has a structure in which one first light emitting device 110a and two second light emitting devices 110b are connected in series. The first and second light emitting devices 110a and 110b may be driven by a switching driving method of the IC 145. Therefore, the light source module 100 of the present invention can be driven including at least the first light emitting device 110a on which the IC 145 is mounted. For example, the light source module 100 cuts the power supply wiring 120 and the IC driving wiring 130 to separate the first and second light emitting devices 110a and 110b, and one of the first light emitting devices 110a ) Can be used. Also. The light source module 100 may use one first light emitting device 110a and one second light emitting device 110b connected in series by separating the two second light emitting devices 110b. The light source module 100 of the present invention has an advantage that the number of light emitting devices can be variously changed by including the first light emitting device 110b.

The circuit board 142 of the first and second light emitting devices 110a and 110b further includes substrate pads 147 electrically connected to the power wiring 120 and the IC driving wiring 130.

A heat sink 147 for heat dissipation may be provided on a lower surface of the circuit board 142.

As described above, the light source module 100 according to the embodiment of the present invention is supplied with a constant voltage through the power supply line 120, and the first and second light emitting devices 110a and 110b ), It is possible to perform stable and high-efficiency constant-voltage and constant-current driving.

Further, the present invention is advantageous for an illumination device requiring high brightness by allowing light emitted from the light emitting diode chip 141 to be concentrated within 10 degrees in the x-axis direction and within 45 degrees in the y-axis direction from the central axis .

4 is a circuit diagram showing the light source module of FIG.

As shown in FIG. 4, the light source module of the present invention has a structure in which the IC 145 and the light emitting diode chips 141 are connected in series.

The IC 145 is electrically connected to the positive and negative power supply lines. The IC 145 has a function of supplying a uniform drive signal to the light emitting diode chips 141 using the input power supply voltage. For example, the light emitting diode chips 141 may be driven at a constant current of 700 mA by the IC 145 using a power supply voltage of 12V. Here, the IC 145 and the light emitting device chips 141 form a closed loop through the IC driving wiring.

The present invention has the advantage of being able to drive constant voltage and constant current with excellent efficiency by a 4-line circuit structure composed of power supply wiring and IC drive wiring using IC (145).

FIG. 5 is a perspective view illustrating the lens unit of FIG. 2, and FIG. 6 is a cross-sectional view of a lens unit taken along the line I-I 'of FIG.

As shown in FIGS. 5 and 6, the lens unit 160 covers the light emitting diode chip, and guides the light emitted from the light emitting diode chip to a specific angle.

The lens unit 160 has a hexagonal columnar shape as a whole. The lens unit 160 may be formed of PMMA.

The lens unit 160 includes a hexagonal upper surface 161, a concave / convex portion 162, side surfaces 163, a round portion 164, a receiving groove 165, a convex portion 166, a concave portion 167 And an inclined portion 168.

The upper surface 161 may be defined as a light emitting surface through which light is emitted.

The irregularities 162 are formed on the upper surface 161 to improve light extraction and refract light at a specific angle. The concave-convex portion 162 has mountains and valleys, and the directions of the mountains and the valleys coincide with the x-axis direction.

The side surfaces 163 are defined as the outer surface of the hexagonal column, and the round portion 164 is located between the adjacent side surfaces 163.

The receiving groove 165 receives the light emitting diode chip, and has the side surfaces 163 and the horizontal inner surface.

The convex portion 166 is positioned on the upper surface of the receiving groove 165 and may be defined as an incident surface through which the light from the light emitting diode chip is incident on the lens portion 160. Here, the convex portion 166 may be deflected toward the inside of the lens portion 160 by the convex curvature of light incident from the LED chip.

The inclined portion 168 may be formed by a concave portion 167 formed inside the side surfaces 163. The inclined portion 168 surrounds the edge of the receiving groove 165 and has an inclination angle symmetrical with respect to the receiving groove 165.

The lens unit 160 of the present invention is configured such that the light is concentrated within 10 degrees in the x-axis direction from the central axis of the upper surface 161 defined by the light emitting surface, and within 45 degrees in the y-axis direction perpendicular to the x- Thereby realizing a high brightness and realizing a highly efficient light emitting device.

7 is a view showing a vertical exit angle of a light source module according to an embodiment of the present invention.

As shown in FIG. 7, the light source module of the present invention is concentrated at a vertical emission angle within about 10 degrees from a central axis of a light emitting diode chip that emits light in a vertical angle direction. Here, the vertical emission angle direction corresponds to the x-axis direction described with reference to Figs. 1 to 6.

Specifically, the light source module has the highest brightness at the center axis of the light emitting diode chip, has a brightness of 80% within approximately 5 degrees from the central axis in the vertical emission angle direction, And has a brightness of 50% at 5 to 10 degrees.

8 is a view illustrating a horizontal exit angle of a light source module according to an embodiment of the present invention

As shown in FIG. 8, the light source module of the present invention is concentrated within about 45 degrees in the horizontal angle direction from the center axis of the light emitting diode chip that emits light. Here, the horizontal emergence angle direction corresponds to the y-axis direction described with reference to Figs. 1 to 6.

Specifically, the light source module has the highest brightness at the center axis of the LED chip, has a brightness of about 80% at about 10 to 20 degrees from the central axis in the horizontal emission angle direction, To about 50% at about 20 to about 22.5 degrees.

9 is a diagram illustrating a spectrum of a light source module according to an embodiment of the present invention.

As shown in Fig. 9, the light source module of the present invention shows a wavelength band having a peak at 380 nm to 480 nm.

As described above, the light source module of the present invention can be used for a lighting device which is required to have a high brightness, a stable constant voltage and a constant current driving, and is excellent in heat radiation and high brightness and excellent reliability. For example, the light source module may be used for a large screen advertisement lighting device of 20 inches or more.

The large screen advertising lighting device may be disposed on the back side of the advertising screen or on the inner side of the two-sided advertising screen. The lighting apparatus for a large screen advertisement may have a structure in which a plurality of light source modules are connected in series at least at one inner side.

Preferably, the plurality of light source modules are located at one side of the illumination device, and the angle between the light emitting direction and the display surface of the screen is 90 degrees.

The lighting apparatus including the light source module has advantages in that it is lower in manufacturing cost than a lighting apparatus having a general lamp, and maintains uniform brightness even in a driving time or a change in the surrounding environment, thereby improving the reliability of the lighting apparatus.

Further, the present invention has an advantage that the cost of maintenance and the like can be reduced with a longer lifetime than a lighting apparatus provided with a general lamp.

Further, the present invention has an advantage that it can be driven at a significantly lower power consumption than a lighting apparatus provided with a general lamp.

In addition, since the present invention uses a thin-type light-emitting diode chip rather than a lighting device having a general lymph, it has an advantage of being slim.

Although various embodiments have been described above, the present invention is not limited to the specific embodiments. In addition, the elements described in the specific embodiments may be applied to the same or similar elements in other embodiments without departing from the spirit of the present invention.

120: power supply wiring 130: IC driving wiring
141: Light emitting diode chip 145: IC
160: lens unit 161: upper surface
162: concave / convex portion 163:
164: round section 165: receiving groove
166: convex portion 167: concave portion
168:

Claims (20)

Power wiring;
A plurality of light emitting devices connected in series on the power supply wiring;
An IC for supplying a uniform driving current to the plurality of light emitting devices; And
And an IC driving wiring connected to the IC and the plurality of light emitting devices. The method according to claim 1,
Wherein the light emitting device includes one first light emitting device including the IC and at least two second light emitting devices not including the IC. The method according to claim 1,
Wherein the IC is connected between the positive polarity power supply wiring and the negative polarity power supply wiring of the power supply wiring, and the IC and the light emitting devices form a closed loop with the IC driving wiring. The method according to claim 1,
Wherein the light emitting device is concentrated within 10 degrees in the x-axis direction from the center axis where light is emitted, and within 45 degrees in the y-axis direction perpendicular to the x-axis. The method according to claim 1,
Wherein each of the plurality of light emitting devices has a brightness of 120 ㏐ or more. The method according to claim 1,
Wherein the plurality of light emitting devices include:
A circuit board;
A light emitting diode chip mounted on one surface of the circuit board;
A mold part molded on one surface of the circuit board; And
And a lens unit disposed on the mold unit. The method of claim 6,
And the mold part includes a receiving hole for receiving the lens part. The method of claim 6,
The lens unit includes:
A hexagonal top surface;
Side surfaces of the hexagonal column extending from the upper surface;
A receiving groove for receiving the light emitting diode chip;
A convex portion positioned above the receiving groove; And
And a concave portion located between the side surfaces and the receiving groove. The method of claim 8,
And an inclined portion which surrounds the accommodation groove by the concave portion and is formed by the concave portion. The method of claim 8,
And a concavo-convex structure having a concavo-convex structure having an acid and a valley on the upper surface. The method of claim 8,
And a rounded round portion between the adjacent side surfaces. The method of claim 6,
And a heat sink located on the other side of the circuit board. A screen for displaying a screen using light; And
And a light source module provided on at least one side of the inside of the screen,
The light source module includes a power supply line, a plurality of light emitting devices connected in series on the power supply line, an IC for supplying a uniform drive current to the plurality of light emitting devices, And an IC driving wiring connected to the IC and the plurality of light emitting devices. 14. The method of claim 13,
Wherein the light source module is located on sides symmetrical to each other inside the screen. 14. The method of claim 13,
Wherein the light emitting device includes one first light emitting device including the IC and at least two second light emitting devices not including the IC. 14. The method of claim 13,
Wherein the IC is connected between the positive polarity power supply wiring and the negative polarity power supply wiring of the power supply wiring, and the IC and the light emitting devices form a closed loop with the IC driving wiring. 14. The method of claim 13,
Wherein the light emitting device is focused within 10 degrees in the x-axis direction from the central axis at which light is emitted, and within 45 degrees in the y-axis direction perpendicular to the x-axis. 14. The method of claim 13,
Wherein each of the plurality of light-emitting devices has a brightness of 120 ㏐ or more. 14. The method of claim 13,
Wherein the plurality of light emitting devices include:
A circuit board;
A light emitting diode chip mounted on one surface of the circuit board;
A mold part molded on one surface of the circuit board; And
And a lens portion (22) positioned on the mold portion (22). The method of claim 19,
The lens unit includes:
A hexagonal top surface;
A concave-convex portion of a concavo-convex structure having an acid and a valley on the upper surface;
Side surfaces of the hexagonal column extending from the upper surface;
A rounded round portion between the adjacent side surfaces;
A receiving groove for receiving the light emitting diode chip;
A convex portion positioned above the receiving groove;
A concave portion positioned between the side surfaces and the receiving groove; And
And an inclined portion which surrounds the accommodation groove by the recess and is formed by the recess.

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